Auxiliary boom, boom frame and work machine

Abstract

The present application provides an auxiliary boom, a boom frame and a work machine. The work machine comprises an auxiliary boom connecting body, the auxiliary boom connecting body being provided with a connecting part for a traction rope to connect to and an auxiliary boom connecting structure connected to a main boom connecting structure. A telescopic oil cylinder is provided between an auxiliary boom main body and the auxiliary boom connecting body, the auxiliary boom connecting body being provided with an extendable and retractable connecting mechanism. In the process of connecting an auxiliary boom and a main boom, a traction force generated by the traction rope on the main boom is a power source and, by means of the traction rope on the main boom, pulls the auxiliary boom connecting body to move; and then, by means of the extension and retraction of the extendable and retractable connecting mechanism and the telescopic oil cylinder, the main boom, the auxiliary boom connecting body and the auxiliary boom main body are connected to become a whole body.

Description

Jib, boom and operating machinery

[0001] This application claims priority to Chinese patent application No. 202311158880.0 filed on September 8, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of operating machinery assembly, and in particular to a jib, an arm, and an operating machinery. Background Art

[0003] The boom system of large-scale working machinery with a boom generally includes a main boom (hereinafter referred to as the main boom) and an auxiliary boom (hereinafter referred to as the auxiliary boom). By assembling and connecting the auxiliary boom to the main boom, the operating height of the main boom can be compensated and the operating range of the main boom can be expanded.

[0004] Large-scale operating machinery with a boom, such as large-tonnage telescopic tire cranes, are equipped with a jib. Cranes with a tonnage of less than 200 tons usually have the jib assembled on one side of the main boom. When needed, it is rotated and mounted on the main boom through a hydraulic cylinder and the operator. Due to weight issues, cranes with a tonnage of more than 200 tons have the jib as a separate component. When needed, it is assembled on the main boom with the help of an auxiliary crane.

[0005] However, when the auxiliary arm is a separate component and is assembled or disassembled with the main arm, an additional crane and operator are required to assist in the assembly or disassembly. During the process, the crane needs to be moved to different angles to match the main arm, and the operator needs to check back and forth. The assembly or disassembly steps are cumbersome, which increases labor costs and low assembly or disassembly efficiency. Technical issues

[0006] The present application provides a jib, a boom and an operating machine to solve the problem of complicated assembling or disassembling steps of the jib in the prior art. Technical Solutions

[0007] A first aspect of the present application provides a jib, comprising:

[0008] Jib body;

[0009] a jib connector, hinged to the jib main body at a first hinge point, the jib connector being provided with a connection portion for connecting to a traction rope, wherein the traction rope is led out from the main arm and used to pull the jib connector, and the jib connector being provided with a jib connection structure, the jib connection structure being used to connect to the main arm;

[0010] a telescopic oil cylinder, one end of which is hinged to the auxiliary arm main body, and the other end of which is hinged to the auxiliary arm connecting body, for driving the auxiliary arm connecting body to rotate relative to the auxiliary arm main body around the first hinge point;

[0011] A telescopic connecting mechanism is provided, wherein the telescopic connecting mechanism comprises a first end and a second end, wherein the first end is hinged to the auxiliary arm connecting body, and the second end is used to be hinged to the main arm.

[0012] The jib provided in this application also includes:

[0013] A support wheel is provided at one end of the auxiliary arm main body away from the auxiliary arm connecting body, and the support wheel is used for supporting the auxiliary arm main body when the auxiliary arm main body moves relative to the main arm.

[0014] According to the auxiliary arm provided in this application, the auxiliary arm connection structure includes:

[0015] a first connecting structure, the first connecting structure being provided on a side of the auxiliary arm connecting body opposite to the first hinge point and being configured to be connected to the third connecting structure of the main arm;

[0016] The second connecting structure is arranged on a side of the auxiliary arm connecting body opposite to the first hinge point and is located above the first connecting structure, and is used to be connected to the fourth connecting structure of the main arm.

[0017] According to the auxiliary arm provided in the present application, the first connecting structure and the second connecting structure both include a connecting seat assembly, and a pin hole is provided on the connecting seat assembly.

[0018] According to the auxiliary arm provided in the present application, the connecting surface of the connecting seat assembly is provided with a guiding inclined surface for cooperating with the connecting surfaces of the third connecting structure and the fourth connecting structure of the main arm to guide the connecting seat assembly to be connected with the third connecting structure and the fourth connecting structure of the main arm.

[0019] According to the auxiliary arm provided in this application, the connecting portion includes:

[0020] A connecting frame, wherein the connecting frame is provided with a connecting hole;

[0021] A pin shaft is suitable for being inserted into the connecting hole, and the traction rope is connected to the pin shaft and is rotatably connected to the connecting frame.

[0022] According to the auxiliary arm provided in the present application, a locking structure is provided on the auxiliary arm connecting body, and the locking structure can lock the second end to the auxiliary arm connecting body when the telescopic connecting mechanism is in a contracted state.

[0023] A second aspect of the present application provides a boom, comprising:

[0024] A jib, wherein the jib is any one of the jibs described above;

[0025] A main arm, the main arm being provided with a main arm connecting structure for connecting to the auxiliary arm connecting structure of the auxiliary arm and a support pin for being hinged to the second end of the telescopic connection mechanism of the auxiliary arm;

[0026] A traction rope is provided on the main arm and led out from the main arm for connecting to the connecting portion of the auxiliary arm connector of the auxiliary arm.

[0027] The arm provided in this application also includes:

[0028] The pulley is arranged on a side of the main arm close to the auxiliary arm connecting body, and is rotatably connected to the main arm through a pulley shaft. The pulley shaft is a hollow structure, and the support pin shaft is arranged in the pulley shaft.

[0029] A third aspect of the present application provides a working machine comprising the boom as described above. Beneficial effects

[0030] The auxiliary arm provided by the present application comprises an auxiliary arm main body and an auxiliary arm connector. The auxiliary arm connector is provided with a connecting portion for connecting a traction rope and an auxiliary arm connecting structure connected to the main arm connecting structure. A telescopic oil cylinder is provided between the auxiliary arm main body and the auxiliary arm connector, and a telescopic connecting mechanism is provided on the auxiliary arm connector. In the process of connecting the main arm and the auxiliary arm, the traction force generated by the traction rope on the main arm is used as the power source, and there is no need to use an auxiliary crane to lift the auxiliary arm. The traction rope on the main arm pulls the auxiliary arm connector to move. After reaching the set height of the main arm, the telescopic end of the telescopic connecting mechanism is hinged to the main arm, and then the telescopic connecting mechanism is used. Telescopic, the jib connector and the main arm are connected through the connecting structure, and then the telescopic cylinder is used to adjust the position of the jib connector and the jib body relative to the main arm, so that the main arm, the jib connector and the jib body are connected as a whole. The disassembly process of the main arm and the jib is the opposite of the assembly process. The operator operates the connection between the telescopic end of the telescopic connection mechanism and the main arm, and the connection between the jib connection structure and the main arm connection structure, which simplifies the operating steps of connecting the jib and the main arm, saves labor costs, and relies on the precise control of the telescopic connection mechanism and the telescopic cylinder to improve the work efficiency of assembly and disassembly.

[0031] Furthermore, the boom provided in the present application has the auxiliary arm as described above, and thus also has the various advantages as described above.

[0032] Furthermore, the working machine provided in the present application has the boom as described above, and thus also has the various advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] FIG1 is a schematic diagram of the relative positions of the auxiliary arm and the main arm to be connected in an embodiment of the present application;

[0035] FIG2 is a schematic diagram of the relative positions of the auxiliary arm and the main arm to be connected from another angle in an embodiment of the present application;

[0036] FIG3 is an enlarged view of a portion A in FIG2 ;

[0037] FIG4 is an enlarged view of the details of the main arm near the auxiliary arm in the embodiment of the present application;

[0038] FIG5 is a cross-sectional view of the connection between the pulley shaft and the support pin shaft in an embodiment of the present application;

[0039] FIG6 is an enlarged view of the details of the connection between the main hoisting traction rope and the traction rope on the main boom in the embodiment of the present application;

[0040] FIG7 is a schematic diagram of a state of the auxiliary arm and the main arm connection process in an embodiment of the present application;

[0041] FIG8 is an enlarged view of the details of the connection position between the auxiliary arm and the main arm in FIG7;

[0042] FIG9 is a schematic diagram of a second state of the connection process between the auxiliary arm and the main arm in an embodiment of the present application;

[0043] FIG10 is a schematic diagram of a third state of the auxiliary arm and the main arm connection process according to an embodiment of the present application;

[0044] FIG11 is a schematic diagram of the auxiliary arm and the main arm in the embodiment of the present application.

[0045] Reference numerals:

[0046] 1. Main boom; 2. Jib body; 3. Jib connector; 4. Traction rope; 5. Telescopic cylinder; 6. Connecting rod cylinder; 7. Connecting frame; 71. Connector; 8. Support wheel; 9. Connecting seat; 10. Fork; 11. U-shaped bracket; 12. Bolt; 13. Main winch traction rope; 14. Rope joint; 15. Connecting fork; 16. Center shaft; 17. Pulley shaft; 18. Support pin shaft; 19. Block; 20. Stop cap; 21. Upper pulley; 22. Lower pulley. Modes for Carrying Out the Invention

[0047] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0048] In the description of this application, it should be understood that the terms "upper", "lower", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0049] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0050] In order to make the purpose, technical solutions and advantages of this application more clear, this application is further described in detail below with reference to the accompanying drawings and embodiments.

[0051] The boom system of large-scale working machinery with a boom generally includes a main boom (hereinafter referred to as the main boom) and an auxiliary boom (hereinafter referred to as the auxiliary boom). By assembling and connecting the auxiliary boom to the main boom, the operating height of the main boom can be compensated and the operating range of the main boom can be expanded.

[0052] Large-scale operating machinery with a boom, such as large-tonnage telescopic tire cranes, are equipped with a jib. Cranes with a tonnage of less than 200 tons usually have the jib assembled on one side of the main boom. When needed, it is rotated and mounted on the main boom through a hydraulic cylinder and the operator. Due to weight issues, cranes with a tonnage of more than 200 tons have the jib as a separate component. When needed, it is assembled on the main boom with the help of an auxiliary crane.

[0053] However, when the auxiliary arm is a separate component and is assembled or disassembled with the main arm, an additional crane and operator are required to assist in the assembly or disassembly. During the process, the crane needs to be moved to different angles to match the main arm, and the operator needs to check back and forth. The assembly or disassembly steps are cumbersome, which increases labor costs and low assembly or disassembly efficiency.

[0054] In the embodiment of the present application, a connecting portion for connecting a traction rope and a jib connecting structure connected to the main arm connecting structure are provided on the jib connecting body, and a telescopic oil cylinder is provided between the jib main body and the jib connecting body, and a telescopic connecting mechanism is provided on the jib connecting body. In the process of connecting the main arm and the jib, the traction force generated by the traction rope on the main arm is used as the power source, and there is no need to use an auxiliary crane to lift the jib. The traction rope on the main arm pulls the jib connecting body to move. After reaching the set height of the main arm, the telescopic end of the telescopic connecting mechanism is hinged to the main arm, and then the jib is extended and retracted by using the telescopic connecting mechanism. The connector and the main arm are connected through a connecting structure, and then the telescopic cylinder is used to adjust the position of the jib connector and the jib body relative to the main arm, so that the main arm, the jib connector and the jib body are connected as a whole. The disassembly process of the main arm and the jib is the opposite of the assembly process. The operator operates the connection between the telescopic end of the telescopic connecting mechanism and the main arm, and the connection between the jib connecting structure and the main arm connecting structure, which simplifies the operating steps of connecting the jib and the main arm, saves labor costs, and relies on the precise control of the telescopic connecting mechanism and the telescopic cylinder to improve the work efficiency of assembly and disassembly.

[0055] The auxiliary arm, the boom and the working machine of the present application are described below with reference to FIG. 1 to FIG. 11 .

[0056] As shown in Figures 1 to 3, the auxiliary arm in the embodiment of the present application is used to be connected to the main arm 1. The main arm 1 and the auxiliary arm in the large-scale operating machinery with an arm are separate structures. When the operating range of the main arm 1 needs to be expanded, the auxiliary arm is assembled on the main arm 1 for use.

[0057] The jib of the embodiment of the present application includes a jib body 2 and a jib connector 3, the jib body 2 and the jib connector 3 are hinged at a first hinge point, and the jib connector 3 can rotate relative to the jib body 2 around the first hinge point, and the jib connector 3 is provided with a connecting part for connecting with a traction rope 4, the traction rope 4 is led out from the main arm 1 and used to pull the jib connector 3, and a jib connecting structure for connecting with the main arm 1 is provided on the jib connector 3, and a telescopic cylinder 5 is provided between the jib body 2 and the jib connector 3, one end of the telescopic cylinder 5 is hinged to the jib body 2, and the other end of the telescopic cylinder 5 is hinged to the jib connector 3, and the telescopic cylinder 5 is used to drive the jib connector 3 to rotate relative to the jib body 2 around the first hinge point, and a retractable telescopic connection mechanism is provided on the jib connector 3, the telescopic connection mechanism including a first end and a second end. In this embodiment, the first end is the connecting end and the second end is the telescopic end. The connecting end is hinged to the jib connector 3, and the telescopic end is used to be hinged with the main arm 1.

[0058] Specifically, the main arm 1 and the auxiliary arm body 2 can be a telescopic box-type arm or a frame structure arm, which is not limited in this embodiment. The auxiliary arm connector 3 can be a frame structure arm or a triangular box-shaped arm, which is not limited in this embodiment.

[0059] As shown in Figures 2 and 3, the connecting portion for connecting to the traction rope 4 is provided on the auxiliary arm connector 3. The connecting portion is provided at the end of the auxiliary arm connector 3 near one end of the main arm 1 to facilitate the pulling of the traction rope 4. The connecting portion can be a fork or a lifting lug structure, etc. Any connecting structure that can achieve connection with the traction rope 4 is acceptable, and is not limited in this embodiment. In order to further improve the flexibility of the connection between the traction rope 4 and the auxiliary arm connector 3, the connecting portion in this embodiment is a connecting frame 7 as shown in Figure 2. The connecting frame 7 can be provided as one or multiple connecting frames 7 are provided at intervals. In order to ensure the stability of the traction rope 4 pulling the auxiliary arm connector 3, the connecting frame 7 is provided as two connecting frames 7 in this embodiment, and the two connecting frames 7 are provided at a certain distance. The connecting frame 7 is provided with a connecting hole, and a pin is inserted into the connecting hole and is rotatably connected to the connecting frame. The traction rope 4 can be directly rotatably connected to the pin, so that when the traction rope 4 is connected to the connecting frame 7, the angle between the traction rope 4 and the auxiliary arm connector 3 can be flexibly adjusted.

[0060] In some other embodiments, the end of the traction rope 4 is connected to a connector 71, which is connected to a pin. The connector 71 and the pin can be connected by a threaded connection or other clamping method. At the same time, the traction rope 4 can be provided as one or more. In order to ensure the stability of the traction rope 4 pulling the auxiliary arm connection body 3, the traction rope 4 is also provided as two, which are connected to the two connecting frames 7 respectively. The traction rope 4 is connected to the pin on the connecting frame 7, and the angle between it and the auxiliary arm connection body 3 can change as the pin rotates, thereby facilitating the traction of the traction rope 4.

[0061] The jib connection structure provided in the jib connection body 3 is a fork, a lifting ear structure or a connecting seat. The jib connection structure may be provided with a pin hole. The main arm 1 may also be provided with a main arm connection structure having the same pin hole structure as the jib connection body 3. When connected with the main arm 1, pin shafts are inserted into the pin holes of the two connection structures to achieve connection, or the jib connection structure provided in the jib connection body 3 is directly connected to the main arm 1 by bolts. The jib connection structure may be set as one or more.

[0062] The telescopic connection mechanism can be a connecting rod cylinder, a telescopic cylinder, a telescopic connecting rod or a telescopic structure driven by a gear rack, which is not limited in this embodiment. In this embodiment, it is a connecting rod cylinder 6, which is respectively arranged on the two side surfaces of the auxiliary arm connector 3. As shown in Figure 2, both side surfaces of the auxiliary arm connector 3 in the width direction are provided with a connecting rod cylinder 6, which further increases the stability during the connection process. The connecting end of the connecting rod cylinder 6 is a cylinder body, and the telescopic end is a telescopic rod. The cylinder body is hinged to the auxiliary arm connector 3, and the telescopic rod is used to be hinged to the main arm 1. Among them, the way in which the connecting end of the connecting rod cylinder 6 is hinged to the auxiliary arm connector 3 can be: a hinge shaft or hinge seat is provided on the auxiliary arm connector 3, and the connecting end of the connecting rod cylinder 6 is provided on the hinge shaft or hinge seat to realize the hinge connection between the connecting end of the connecting rod cylinder 6 and the auxiliary arm connector 3. Similarly, the telescopic rod can be hinged to the main arm 1 in the following manner: a hinge shaft or hinge seat is provided on the main arm 1, and the telescopic end of the connecting rod cylinder 6 is provided on the hinge shaft or hinge seat to realize the hinge connection between the telescopic end of the connecting rod cylinder 6 and the main arm 1.

[0063] With reference to Figure 1, during the specific connection process of the jib, the jib connector 3 is pulled upward by the traction rope 4 on the main arm 1. When the jib connection structure moved to the jib connector 3 is aligned with the connection position of the main arm 1 in the height direction, the telescopic end of the telescopic connection mechanism is hinged to the main arm 1, and then the telescopic connection mechanism is extended and retracted to connect the jib connector 3 and the main arm 1 through the connection structure. Thereafter, the telescopic oil cylinder 5 is extended and retracted to adjust the positions of the jib connector 3 and the jib body 2 relative to the main arm 1, so that the main arm 1, the jib connector 3 and the jib body 2 are connected as a whole.

[0064] In the embodiment of the present application, a connecting portion for connecting a traction rope 4 and a jib connecting structure connected to the main arm 1 connecting structure are provided on the jib connecting body 3, and a telescopic oil cylinder 5 is provided between the jib main body 2 and the jib connecting body 3, and a telescopic connecting mechanism is provided on the jib connecting body 3. In the process of connecting the main arm 1 with the jib, the traction force generated by the traction rope 4 on the main arm 1 is used as the power source, and there is no need to use an additional auxiliary crane to lift the jib, and the jib connecting body 3 is moved by the traction rope 4 on the main arm 1. After reaching the set height of the main arm 1, the telescopic end of the telescopic connecting mechanism is hinged to the main arm 1, and then the telescopic connection mechanism is used to , the auxiliary arm connector 3 and the main arm 1 are connected through the connecting structure, and then the telescopic cylinder 5 is used to adjust the position of the auxiliary arm connector 3 and the auxiliary arm body 2 relative to the main arm 1, so that the main arm 1, the auxiliary arm connector 3 and the auxiliary arm body 2 are connected as a whole. The disassembly process of the main arm 1 and the auxiliary arm is the opposite of the assembly process. The operator operates the connection between the telescopic end of the telescopic connection mechanism and the main arm, and the connection between the auxiliary arm connection structure and the main arm connection structure, which simplifies the operation steps of connecting the auxiliary arm to the main arm, saves labor costs, and relies on the precise control of the telescopic connection mechanism and the telescopic cylinder to improve the work efficiency of assembly and disassembly.

[0065] The traction rope 4 pulls the auxiliary arm connector 3 to move upward, and the auxiliary arm connector 3 drives the auxiliary arm main body 2 to move together. Since the length of the auxiliary arm main body 2 is relatively long, in order to ensure the flexibility of movement, the auxiliary arm main body 2 is provided with a support wheel 8 at one end away from the auxiliary arm connector 3. The support wheel 8 is used to support the auxiliary arm main body 2 when the auxiliary arm main body 2 moves relative to the main arm 1. The support wheel 8 can be set as one or multiple support wheels can be set symmetrically to ensure the stability of the auxiliary arm main body 2 during the movement.

[0066] As shown in Figures 2 and 3, in some embodiments of the present application, the auxiliary arm connecting structure specifically includes a first connecting structure and a second connecting structure. The first connecting structure is arranged on the side of the auxiliary arm connecting body 3 opposite to the first hinge point, and is used to connect to the third connecting structure of the main arm 1. The second connecting structure is arranged on the side of the auxiliary arm connecting body 3 opposite to the first hinge point, and is located above the first connecting structure, that is, in Figure 2, the second connecting structure is located above the first connecting structure in the vertical direction, and is used to connect to the fourth connecting structure of the main arm 1. Among them, the first connecting structure is arranged at the lower end of the auxiliary arm connecting body 3, and the second connecting structure is arranged at the upper end of the auxiliary arm connecting body 3. Correspondingly, the third connecting structure on the main arm 1 is arranged at the lower end of the main arm 1, corresponding to the first connecting structure, and the fourth connecting structure on the main arm 1 is arranged at the upper end of the main arm 1, corresponding to the second connecting structure. The first connecting structure, the second connecting structure, the third connecting structure and the fourth connecting structure can be forks, ear structures or connecting seats, and these structures can be provided with pin holes. When connected, pin shafts are inserted into the pin holes to achieve connection or are connected by bolts. The first connecting structure, the second connecting structure, the third connecting structure and the fourth connecting structure can be set as one or more.

[0067] During the specific connection process, when the traction rope 4 pulls the auxiliary arm connector 3 to the first set height of the main arm 1, the first set height mentioned here is the position where the first connecting structure and the third connecting structure are aligned in height direction and can be connected. When the telescopic rod of the connecting rod cylinder 6 is hinged on the main arm 1, the telescopic rod of the connecting rod cylinder 6 is adjusted to connect the first connecting structure and the third connecting structure, and the telescopic rod of the connecting rod cylinder 6 is continued to be adjusted to connect the second connecting structure and the fourth connecting structure.

[0068] As shown in Figures 2 to 4, in some embodiments of the present application, the first and second connection structures are both connection seat assemblies, each of which is provided with a pin hole. Specifically, the first connection structure comprises two connection seats 9 spaced apart at the lower end of the auxiliary arm connector 3, and the second connection structure comprises two connection seats 9 spaced apart at the upper end of the auxiliary arm connector 3, each of which is provided with a pin hole.

[0069] In order to improve the connection efficiency between the first connection structure and the third connection structure, and between the second connection structure and the fourth connection structure, in some embodiments of the present application, a guiding inclined surface is provided on the connection surface of the connection seat assembly, which is used to cooperate with the connection surfaces of the third connection structure and the fourth connection structure of the main arm 1 to guide the connection between the connection seat assembly and the third connection structure and the fourth connection structure of the main arm 1. Specifically, the two side surfaces of the two connection seats 9 at the lower end of the auxiliary arm connector 3 are connection surfaces, and both side surfaces are inclined surfaces. Similarly, the two side surfaces of the two connection seats 9 at the upper end of the auxiliary arm connector 3 are connection surfaces, and both side surfaces are inclined surfaces. The inclined surfaces are used to provide a guiding effect for the auxiliary arm connection structure, thereby improving the connection efficiency.

[0070] As shown in FIG3 , in some embodiments of the present application, when the jib is placed as a separate component or the telescopic end of the connecting rod cylinder 6 on the jib connector 3 does not yet need to be articulated with the main arm 1, in order to prevent the telescopic end from interfering with other components, a locking structure is provided on the jib connector 3. When the connecting rod cylinder 6 is in a retracted state, the locking structure locks the telescopic end to the jib connector 3. Specifically, a U-shaped bracket 11 is provided on the jib connector 3. When the connecting rod cylinder 6 is not in use, the telescopic rod of the connecting rod cylinder 6 is provided in the U-shaped bracket 11, which is convenient for storing the connecting rod cylinder 6 and does not interfere with other parts. A limiter is provided at the open end of the U-shaped bracket 11. The limiter is used to confine the telescopic rod of the connecting rod cylinder 6 in the U-shaped bracket 11. The limiter can be a bolt or a pin, etc. In this embodiment, the limiter is a bolt 12.

[0071] As shown in Figures 1 and 11, the second aspect of the present application provides an arm frame, including the above-mentioned auxiliary arm, main arm 1 and traction rope 4, the main arm 1 is provided with a main arm connecting structure for connecting to the auxiliary arm connecting structure of the auxiliary arm and a support pin shaft 18 for hingedly connecting to the telescopic end of the telescopic connection mechanism, the traction rope 4 is arranged on the main arm 1 and led out from the main arm 1, and the traction rope 4 is used to connect to the connecting part of the auxiliary arm connector 3.

[0072] The main arm connection structure includes a third connection structure and a fourth connection structure. The third connection structure is arranged on the side of the main arm 1 close to the auxiliary arm connector 3, and the fourth connection structure is arranged above the third connection structure. Specifically, in order to achieve connection with the first connection structure and the second connection structure, the third connection structure can be two forks 10 arranged at the lower end of the main arm 1, and the fourth connection structure can be two forks 10 arranged at the upper end of the main arm 1. Pin holes are also provided on the forks 10. When the connecting seat 9 is connected to the fork 10, the connecting seat 9 is inserted into the fork 10, the two pin holes are aligned, and the pin shaft is inserted into the pin hole to achieve connection. The connecting seat 9 and the fork 10 have simple structures and good versatility. They are all assembly parts, which are convenient for disassembly and replacement, and are easier to change and use for existing lifting cranes.

[0073] In order to improve the connection efficiency between the first connecting structure and the third connecting structure and between the second connecting structure and the fourth connecting structure, in some embodiments of the present application, guide bevels are provided on the connecting surfaces of the third connecting structure and the fourth connecting structure. Specifically, the inner two side surfaces of the two forks 10 at the lower end of the main arm 1 are connecting surfaces, and both side surfaces are bevels. Similarly, the inner two side surfaces of the two forks 10 at the upper end of the main arm 1 are connecting surfaces, and both side surfaces are bevels. The guide bevels of the connecting surfaces where the connecting seat 9 and the fork 10 are connected are matched, that is, the two side surfaces of the connecting seat 9 are inclined inwardly in the direction close to the fork 10, and the inner two side surfaces of the fork 10 are inclined outwardly in the direction close to the connecting seat 9. The bevels are used to guide the connection between the connecting seat 9 and the fork 10, thereby improving the connection efficiency.

[0074] A pulley is provided at one end of the main arm 1 close to the auxiliary arm connector 3. The traction rope 4 can pass around the pulley and be connected to the connecting frame 7 of the auxiliary arm connector 3. The pulley is rotatably connected to the main arm 1 through the pulley shaft 17. The pulley shaft 17 is a hollow structure, and the support pin shaft 18 is arranged inside the pulley shaft 17.

[0075] As shown in Figure 4, the pulley can be set to multiple, specifically to an upper pulley 21 and a lower pulley 22. The upper pulley 21 is set to two steering pulleys. The upper pulley 21 is provided at the upper end of the main arm 1 and is provided between the two forks 10 at the upper end. The lower pulley 22 is provided to two guide pulleys, which are provided at the lower end of the main arm 1 and are provided between the two forks 10 at the lower end. The two traction ropes 4 on the main arm 1 are respectively provided in the wheel grooves of the two steering pulleys to realize steering of the two traction ropes 4 and reduce the friction during the traction process. The two traction ropes 4 on the main arm 1 are respectively provided in the wheel grooves of the two guide pulleys to realize guidance of the two traction ropes 4 to avoid the two traction ropes 4 from offsetting during the traction process and affecting the stability during the traction process.

[0076] As shown in Figure 6, the main boom 1 is also provided with a main hoisting traction rope 13, which is connected to the two traction ropes 4 via a cable joint 14. Specifically, the ends of the two traction ropes 4 are respectively connected to a connecting fork 15, and the cable joint 14 is provided with a central axis 16. The two connecting forks 15 are hinged to the cable joint 14.

[0077] The lower pulley 22 is rotatably connected to the main arm 1 through a pulley shaft 17 . The pulley shaft 17 is a hollow structure. A support pin 18 is provided inside the pulley shaft 17 . The telescopic rod of the connecting rod cylinder 6 is hinged on the support pin 18 .

[0078] Specifically, as shown in Figure 5, the pulley shaft 17 is a hollow structure, and a block 19 is assembled inside the pulley shaft 17. The support pin 18 is fixed to the block 19 by bolts, and the end of the support pin 18 is also connected to the stop cap 20 by a screw. The telescopic rod of the connecting rod cylinder 6 is hinged to the support pin 18 and is axially limited by the stop cap 20 to ensure the stability of the telescopic rod connection. At the same time, the structure is simple and convenient for disassembly and assembly. The support pin 18 to which the telescopic rod of the connecting rod cylinder 6 is hinged is directly set in the pulley shaft 17 of the lower pulley 22, sharing the same installation position. There is no need to set an additional installation position for the support pin 18, which improves the versatility of the arm connection.

[0079] The connection process between the auxiliary arm and the main arm 1 provided in this application is as follows:

[0080] When the jib needs to be installed, the jib is transported to a certain position in front of the main arm 1 by a flatbed truck, or the jib is lifted to the position shown in Figure 1 by a crane where the jib needs to be installed, and then the main arm 1 is leveled to ensure that the position where the jib is connected to the main arm 1 is in the same vertical direction.

[0081] One end of the two traction ropes 4 on the main arm 1 passes through the steering pulley and guide pulley on the main arm 1 respectively, and is connected to the two connecting frames 7 of the auxiliary arm connector 3. The other ends of the two traction ropes 4 are connected to the main winch traction rope 13 through the central shaft 16 and the cable segment 14.

[0082] Start the main winch traction rope 13 and slowly winch it, and the force-bearing end of the auxiliary arm connector 3 rises until it reaches the position shown in Figure 7 or Figure 8. At this time, the connecting frame 7 is close to the lower pulley 22 of the main arm 1, and the bolt 12 for limiting on the U-shaped bracket 11 is pulled out. The length of the telescopic rod of the connecting rod cylinder 6 is adjusted to a length that can be sleeved on the support pin 18 in the pulley shaft 17 of the lower pulley 22, and the stop cap 20 is used to limit the axial position of the telescopic rod. The telescopic rod of the connecting rod cylinder 6 is hinged to the support pin 18, and the telescopic rod of the connecting rod cylinder 6 can rotate around the support pin 18.

[0083] Continue to lift the traction rope 4 until the connecting seat 9 at the lower end of the auxiliary arm connector 3 is aligned in height with the connecting fork 10 at the lower end of the main arm 1, adjust the telescopic rod length of the connecting rod cylinder 6, and align the connecting seat 9 at the lower end of the auxiliary arm connector 3 with the pin hole of the connecting fork 10 at the lower end of the main arm 1, as shown in Figure 9, insert the pin shaft, remove the traction rope 4, and relieve the pressure of the connecting rod cylinder 6 by operating the hydraulic system.

[0084] Make sure that the support wheel 8 is on a hard and flat road surface, or you can put a steel plate within the assembly range of the auxiliary arm, adjust the telescopic cylinder 5, and rotate the pin shaft in the connecting seat 9 at the lower end of the auxiliary arm connector 3 until the connecting seat 9 at the upper end of the auxiliary arm connector 3 is aligned with the pin hole of the connecting fork 10 at the upper end of the main arm 1, and insert the pin shaft, as shown in the state of Figure 10, completing the connection of the connecting structure between the main arm 1 and the auxiliary arm.

[0085] Continue to adjust the telescopic cylinder 5 and lift the jib body to the required working condition, as shown in Figure 11, to complete the assembly of the jib, so that the main arm 1, the jib connector 3 and the jib body 2 are connected as a whole. The jib disassembly process can be reversed according to the above steps, which will not be repeated here.

[0086] In the embodiment of the present application, during the process of connecting the main arm 1 with the auxiliary arm, the traction force generated by the traction rope 4 on the main arm 1 is the power source, and there is no need to use an additional auxiliary crane to lift the auxiliary arm. The auxiliary arm connector 3 is moved by the traction rope 4 on the main arm 1, and is connected to the main arm 1 through the connecting structure. The telescopic connection mechanism and the telescopic oil cylinder 5 are used to adjust the position of the auxiliary arm connector 3 and the auxiliary arm body 2 relative to the main arm 1, so that the main arm 1, the auxiliary arm connector 3 and the auxiliary arm body 2 are connected as a whole. The process of disassembling the main arm 1 and the auxiliary arm is opposite to the assembly process. The operator operates the connection between the telescopic end of the telescopic connection mechanism and the main arm, and the connection between the auxiliary arm connection structure and the main arm connection structure, which simplifies the operation steps of connecting the auxiliary arm and the main arm, saves labor costs, and relies on the precise control of the telescopic connection mechanism and the telescopic oil cylinder to improve the work efficiency of assembly and disassembly.

[0087] The third aspect of the present application further provides an operating machine including the above-mentioned boom. The operating machine may be a large operating machine with a boom structure, such as a boom crane, a straight-arm operating vehicle, and a cantilever operating vehicle.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A jib, wherein: The auxiliary arm is configured to be connected to the main arm (1), and the auxiliary arm comprises: A jib body (2); A jib connecting body (3) is hinged to the jib main body (2) at a first hinge point, the jib connecting body (3) is provided with a connecting portion connected to a traction rope (4), wherein the traction rope (4) is led out from the main arm (1) and is configured to tow the jib connecting body (3), and a jib connecting structure is provided on the jib connecting body (3), and the jib connecting structure is configured to be connected to the main arm (1); a telescopic oil cylinder (5), one end of which is hinged to the auxiliary arm body (2), and the other end of which is hinged to the auxiliary arm connecting body (3), and is configured to drive the auxiliary arm connecting body (3) to rotate relative to the auxiliary arm body (2) around the first hinge point; A telescopic connecting mechanism is provided, the telescopic connecting mechanism comprising a first end and a second end, the first end being hinged to the auxiliary arm connecting body (3), and the second end being configured to be hinged to the main arm (1).

2. The auxiliary arm according to claim 1, wherein: The auxiliary arm also includes: A support wheel (8) is arranged at one end of the auxiliary arm body (2) away from the auxiliary arm connecting body (3), and the support wheel (8) is configured to support the auxiliary arm body (2) when the auxiliary arm body (2) moves relative to the main arm (1).

3. The auxiliary arm according to claim 1 or 2, wherein: The auxiliary arm connection structure comprises: a first connection structure, the first connection structure being arranged on a side of the auxiliary arm connection body (3) opposite to the first hinge point and being configured to be connected to a third connection structure of the main arm (1); A second connecting structure, the second connecting structure is arranged on a side of the auxiliary arm connecting body (3) opposite to the first hinge point and is located above the first connecting structure, and is configured to be connected to a fourth connecting structure of the main arm (1).

4. The auxiliary arm according to claim 3, wherein: The first connection structure and the second connection structure both include a connection seat assembly, and the connection seat assembly is provided with a pin hole.

5. The auxiliary arm according to claim 4, wherein: The connecting surfaces of the connecting seat assembly are provided with guiding inclined surfaces, which are configured to cooperate with the connecting surfaces of the third connecting structure and the fourth connecting structure of the main arm (1) to guide the connecting seat assembly to connect with the third connecting structure and the fourth connecting structure of the main arm (1).

6. The auxiliary arm according to any one of claims 1 to 5, wherein: The connecting portion comprises: A connecting frame (7), wherein the connecting frame (7) is provided with a connecting hole; A pin shaft is suitable for being inserted into the connecting hole, and the traction rope (4) is connected to the pin shaft and is rotatably connected to the connecting frame (7).

7. The auxiliary arm according to any one of claims 1 to 6, wherein: The auxiliary arm connecting body (3) is provided with a locking structure, and the locking structure is configured to lock the second end to the auxiliary arm connecting body (3) when the telescopic connecting mechanism is in a contracted state.

8. A boom, wherein: The arm frame comprises: A secondary arm, wherein the secondary arm is the secondary arm according to any one of claims 1 to 7; A main arm (1), the main arm (1) being provided with a main arm connection structure configured to be connected to the auxiliary arm connection structure of the auxiliary arm, and a support pin shaft (18) configured to be hinged to the second end of the telescopic connection mechanism of the auxiliary arm; A traction rope (4) is arranged on the main arm (1) and led out from the main arm (1), and is configured to be connected to a connecting portion of a secondary arm connecting body (3) of the secondary arm.

9. The boom according to claim 8, wherein: The arm also includes: A pulley is arranged on a side of the main arm (1) close to the auxiliary arm connecting body (3), and is rotatably connected to the main arm (1) via a pulley shaft (17). The pulley shaft (17) is a hollow structure, and the support pin shaft (18) is arranged in the pulley shaft (17).

10. A working machine, wherein: Comprising the arm support as claimed in claim 8 or 9.

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