CN117208788A - Auxiliary arm, arm support and working machine - Google Patents

Abstract

The invention relates to the technical field of working machine assembly, and provides a jib, a boom and a working machine, including a jib connecting body provided with a connecting portion for connecting a traction rope and a jib connecting structure connected to a main arm connecting structure. A telescopic oil cylinder is provided between the main body of the jib and the jib connector, and a telescopic connection mechanism is provided on the jib connector. During the connection process, the traction force generated by the traction rope on the main arm is the power source and is passed through the main arm. The traction rope pulls the jib connecting body to move, and then uses the telescopic connecting mechanism and the telescopic cylinder to connect the main arm, the jib connecting body and the main body of the jib as a whole. The operator operates the telescopic end of the telescopic connecting mechanism and the main arm. The connection of the arm and the connection between the sub-arm connection structure and the main arm connection structure simplify the operation steps of connecting the sub-arm and the main arm, saving labor costs. Relying on the precise control of the telescopic connection mechanism and the telescopic cylinder also improves assembly and disassembly. work efficiency.

Description

Jib, boom and working machinery

Technical field

The invention relates to the technical field of work machine assembly, and specifically relates to a jib, a boom and a work machine.

Background technique

The boom system in large operating 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 jib). By assembling and connecting the auxiliary arm to the main arm, the main boom can be compensated. The working height of the boom increases and the working range of the main boom is expanded.

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 installed on one side of the main boom. When needed, it can be rotated and installed by the hydraulic cylinder and the operator. On the main arm, due to weight issues for cranes above 200 tons, the jib is a separate component. When necessary, an auxiliary crane is used to assemble it to the main arm.

However, when the above-mentioned jib is a separate component and is assembled or disassembled from the main arm, additional cranes and operators 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 go back and forth. The inspection, assembly or disassembly steps are cumbersome, increase labor costs, and the assembly or disassembly efficiency is low.

Contents of the invention

The present invention provides a jib, a boom and a working machine to solve the problem of complicated assembly or disassembly steps of the jib in the prior art.

A first aspect of the invention provides a jib, comprising:

jib body;

The jib connecting body is hinged with the jib main body at a first hinge point. The jib connecting body is provided with a connecting part for connecting with a traction rope, wherein the traction rope is led out from the main arm and used for Pulling the auxiliary arm connecting body, the auxiliary arm connecting body is provided with a auxiliary arm connecting structure, and the auxiliary arm connecting structure is used to connect with the main arm;

Telescopic oil cylinder, one end of the telescopic oil cylinder is hinged to the main body of the jib, and the other end of the telescopic oil cylinder is hinged to the jib connector, and is used to drive the jib connector relative to the jib. The main body rotates around the first hinge point;

A retractable telescopic connection mechanism, the telescopic connection mechanism includes a first end and a second end, the first end is hinged to the auxiliary arm connector, and the second end is used to be hinged to the main arm. .

The auxiliary arm provided according to the present invention also includes:

A support wheel is provided at an end of the sub-arm main body away from the sub-arm connecting body. The support wheel is used to support the sub-arm main body when the sub-arm main body moves relative to the main arm.

According to the jib provided by the present invention, the jib connection structure includes:

A first connection structure, the first connection structure is provided on the side of the auxiliary arm connection body opposite to the first hinge point, and is used to connect with the third connection structure of the main arm;

A second connection structure is provided on the side of the sub-arm connecting body opposite to the first hinge point and is located above the first connection structure for connecting with the main arm. The fourth connection structure is connected.

According to the jib provided by the present invention, both the first connection structure and the second connection structure include a connection base assembly, and the connection base assembly is provided with a pin hole.

According to the auxiliary arm provided by the present invention, the connecting surface of the connecting seat assembly is provided with a guide slope for cooperating with the connecting surfaces of the third connecting structure and the fourth connecting structure of the main arm to guide the The connecting seat assembly is connected to the third connecting structure and the fourth connecting structure of the main arm.

According to the jib provided by the present invention, the connecting part includes:

A connecting frame, the connecting frame is provided with connecting holes;

A pin is adapted to be inserted into the connecting hole, and the traction rope is connected to the pin and is rotatably connected to the connecting frame.

According to the jib provided by the present invention, the jib connecting body is provided with a locking structure, and the locking structure can lock the second end to the jib connecting body when the telescopic connecting mechanism is in a contracted state. .

A second aspect of the present invention provides an arm, including:

A auxiliary arm, the auxiliary arm is the auxiliary arm described in any one of the above;

The main arm is provided with a main arm connection structure for connecting to the sub-arm connection structure of the sub-arm and a support pin for hinged connection with the second end of the telescopic connection mechanism of the sub-arm. ;

A traction rope is provided on the main arm and is led out from the main arm for connecting with the connecting portion of the sub-arm connecting body of the sub-arm.

The arm provided according to the present invention also includes:

A pulley is provided on the side of the main arm close to the auxiliary arm connector, and is rotatably connected to the main arm through a pulley shaft. The pulley shaft is a hollow structure, and the support pin is provided on the slide inside the axle.

A third aspect of the present invention provides a working machine, including the boom as described above.

Beneficial effects: The jib provided by the present invention includes a jib main body and a jib connecting body. The jib connecting body is provided with a connecting portion for connecting the traction rope and a jib connecting structure connected to the main arm connecting structure. A telescopic cylinder is provided between the main arm and the sub-arm connector, and a telescopic connection mechanism is provided on the sub-arm connector. During the connection process between the main arm and the sub-arm, the traction force generated by the traction rope on the main arm is the power source, and no additional Use an auxiliary crane to lift the jib. The traction rope on the main arm pulls the jib connector to move. After reaching the set height of the main arm, hinge the telescopic end of the telescopic connection mechanism to the main arm, and then use the Telescopically, connect the jib connector and the main arm through the connecting structure, and then use the telescopic cylinder to adjust the position of the jib connector and the jib body relative to the main arm, so that the main arm, jib connector and The jib main bodies are connected as a whole. The disassembly process of the main arm and the jib 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 jib connecting structure and the main arm connecting structure. It simplifies the operation steps of connecting the auxiliary arm and the main arm, saving labor costs. It also improves the efficiency of assembly and disassembly by relying on the precise control of the telescopic connection mechanism and the telescopic cylinder.

Furthermore, since the boom provided by the present invention is provided with the auxiliary arm as mentioned above, it also has various advantages as mentioned above.

Furthermore, since the working machine provided by the present invention is equipped with the boom as mentioned above, it also has various advantages as mentioned above.

Description of the drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are the drawings of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the relative position of the auxiliary arm to be connected and the main arm in an embodiment of the present invention;

Figure 2 is a schematic diagram of the relative position of the auxiliary arm to be connected and the main arm in the embodiment of the present invention from another angle;

Figure 3 is an enlarged view of part A in Figure 2;

Figure 4 is an enlarged detailed view of one end of the main arm near the auxiliary arm in the embodiment of the present invention;

Figure 5 is a cross-sectional view of the connection between the pulley shaft and the support pin in the embodiment of the present invention;

Figure 6 is an enlarged detailed view of the connection between the main hoisting traction rope and the traction rope on the main arm in the embodiment of the present invention;

Figure 7 is a schematic diagram of the connection process state between the auxiliary arm and the main arm in the embodiment of the present invention;

Figure 8 is an enlarged detailed view of the connection position between the auxiliary arm and the main arm in Figure 7;

Figure 9 is a schematic diagram of the second state of the connection process between the auxiliary arm and the main arm in the embodiment of the present invention;

Figure 10 is a schematic diagram of three states of the connection process between the auxiliary arm and the main arm in the embodiment of the present invention;

Figure 11 is a schematic diagram of the completed connection state between the auxiliary arm and the main arm in the embodiment of the present invention.

Reference signs:

1. Main arm; 2. Main body of jib; 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. Connecting fork; 11. U-shaped bracket; 12. Bolt; 13. Main winch traction rope; 14. Rope joint; 15. Connecting fork; 16. Central shaft; 17. Pulley shaft; 18. Bearing pin; 19. Clamp; 20. Block cap; 21. Upper pulley; 22. Lower pulley.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "level", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. , is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

The boom system in large operating 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 jib). By assembling and connecting the auxiliary arm to the main arm, the main boom can be compensated. The working height of the boom increases and the working range of the main boom is expanded.

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 installed on one side of the main boom. When needed, it can be rotated and installed by the hydraulic cylinder and the operator. On the main arm, due to weight issues for cranes above 200 tons, the jib is a separate component. When necessary, an auxiliary crane is used to assemble it to the main arm.

However, when the above-mentioned jib is a separate component and is assembled or disassembled from the main arm, additional cranes and operators 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 go back and forth. The inspection, assembly or disassembly steps are cumbersome, increase labor costs, and the assembly or disassembly efficiency is low.

In the embodiment of the present invention, the jib connecting body is provided with a connecting part for connecting the traction rope and a jib connecting structure connected to the main arm connecting structure, and a telescopic oil cylinder is provided between the jib main body and the jib connecting body. A telescopic connection mechanism is provided on the jib connector. During the connection process between the main arm and the jib, the traction force generated by the traction rope on the main arm is the power source. There is no need to use an additional auxiliary crane to lift the jib. The traction rope 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 telescopic connecting mechanism is used to telescopically connect the jib connecting body and the main arm. The connection structure is connected, 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, and the main arm and the jib body are connected as a whole. The disassembly process of the jib 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 jib connection structure and the main arm connection structure, which simplifies the operation steps of connecting the jib and the main arm and saves money. The labor cost is reduced, and the efficiency of assembly and disassembly is also improved by relying on the precise control of the telescopic connection mechanism and telescopic cylinder.

The jib, boom and working machine of the present invention will be described below with reference to FIGS. 1 to 11 .

As shown in Figures 1 to 3, the auxiliary arm in the embodiment of the present invention is used to connect with the main arm 1. The main arm 1 and the auxiliary arm in a large working machine with a boom are separate structures, and the main arm needs to be enlarged. When the operating range is 1, the auxiliary arm is assembled to the main arm 1 for use.

The jib arm in the embodiment of the present invention includes a jib body 2 and a jib connecting body 3. The jib body 2 and the jib connecting body 3 are hinged at a first hinge point. The jib connecting body 3 can be relative to the jib around the first hinge point. The arm body 2 rotates, and the sub-arm connector 3 is provided with a connecting portion for connecting to the traction rope 4. The traction rope 4 is led out from the main arm 1 and used to pull the sub-arm connector 3. The sub-arm connector 3 is provided with a connection portion for connecting with the traction rope 4. The jib connecting structure is connected to the main arm 1. A telescopic cylinder 5 is provided between the jib body 2 and the jib connecting body 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 body 2. On the jib connector 3, the telescopic cylinder 5 is used to drive the jib connector 3 to rotate around the first hinge point relative to the jib body 2. The jib connector 3 is provided with a telescopic telescopic connection mechanism, and the telescopic connection mechanism includes a third One end and the second end. In this embodiment, the first end is a connecting end, and the second end is a telescopic end. The connecting end is hinged on the jib connecting body 3 , and the telescopic end is used for hinged connection with the main arm 1 .

Specifically, the main arm 1 and the sub-arm main body 2 can be a telescopic box-shaped arm or an arm with a frame structure. There is no limitation in this embodiment. The sub-arm connector 3 can be a frame-structured arm or a triangular box shape. The arm body is not limited in this embodiment.

As shown in Figures 2 and 3, the jib connector 3 is provided with a connecting portion for connecting to the traction rope 4. The connecting portion is located at the end of the jib connector 3 close to one end of the main arm 1 to facilitate the traction rope 4. For traction, the connection part can be a fork or a lifting lug structure, etc., and any connection structure that can realize the connection with the traction rope 4 can be used, which is not limited in this embodiment. In order to further improve the flexibility of the connection between the traction rope 4 and the jib connector 3, the connection part in this embodiment is the connecting frame 7 shown in Figure 2. The connecting frame 7 can be provided as one or multiple at intervals. In order to ensure traction The rope 4 pulls the stability of the jib connector 3. In this embodiment, there are two connecting frames 7. The two connecting frames 7 are arranged at a certain distance. The connecting frame 7 is provided with a connecting hole, and the pin is inserted into the connecting frame. In the hole, it is rotatably connected to the connecting frame, and the traction rope 4 can be directly connected to the pin by rotation, so that when the traction rope 4 is connected to the connecting frame 7, the angle between the traction rope 4 and the jib connector 3 can be flexibly adjusted. .

In some other embodiments, the end of the traction rope 4 is connected with a connector 71, and the connector 71 is connected to the pin. The connector 71 and the pin can be connected through a threaded connection or other snap-in forms. At the same time, the traction rope 4 can be set to one or more. In order to ensure the stability of the traction rope 4 towing the jib connector 3, the traction rope 4 is also set to two, which are connected correspondingly to the two shaped connectors 7. The traction rope 4 is connected to The pin on the connecting frame 7 can change the angle with the jib connecting body 3 as the pin rotates, so as to facilitate the traction of the traction rope 4.

The jib connecting structure provided in the jib connecting body 3 is a fork, a lifting eye structure or a connecting seat. The jib connecting structure can be provided with a pin hole, and the main arm 1 can also be provided with the same pin hole as the jib connecting body 3. When the main arm connection structure with a pin hole structure is connected to the main arm 1, the pin shaft is inserted into the pin holes of the two connection structures to realize the connection, or the sub arm connection structure provided in the sub arm connector 3 directly passes through the main arm 1 Bolt connection and jib connection structure can be set to one or multiple.

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 and rack. There is no limitation in this embodiment. In this embodiment, it is a connecting rod cylinder 6, and the connecting rod cylinders 6 are respectively located on the auxiliary parts. As shown in Figure 2, both sides of the arm connector 3 are provided with connecting rod cylinders 6 on both sides of the width direction of the jib connector 3, 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 connecting end of the connecting rod cylinder 6 and the jib connecting body 3 can be hinged in the following manner: a hinge shaft or a hinge seat is provided on the jib connecting body 3, and the connecting end of the connecting rod cylinder 6 is set on the hinge shaft or the hinge seat. to achieve hinged connection between the connecting end of the connecting rod cylinder 6 and the jib connecting body 3. Similarly, the telescopic rod and the main arm 1 can be hinged in the following manner: a hinge shaft or a hinge seat is provided on the main arm 1, and the telescopic end of the connecting rod cylinder 6 is located on the hinge shaft or hinge seat to realize the connecting rod cylinder 6 The telescopic end is hinged with the main arm 1.

Referring 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 it moves to the connection between the jib connection structure on the jib connector 3 and the main arm 1 When the position and height direction are aligned, the telescopic end of the telescopic connection mechanism is hinged to the main arm 1, and then the telescopic connection mechanism is used to telescopically connect the sub-arm connector 3 and the main arm 1 through the connecting structure, and then the telescopic cylinder is used 5, adjust the position of the sub-arm connector 3 and the sub-arm main body 2 relative to the main arm 1, so that the main arm 1, the sub-arm connector 3 and the sub-arm main body 2 are connected as a whole.

In the embodiment of the present invention, the jib connecting body 3 is provided with a connecting part for connecting the traction rope 4 and a jib connecting structure connected to the connecting structure of the main arm 1, and between the jib body 2 and the jib connecting body 3 A telescopic cylinder 5 is provided in the middle and a telescopic connection mechanism is provided on the jib connector 3. During the connection process between the main arm 1 and the jib, 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. Lift the jib, and use the traction rope 4 on the main arm 1 to pull the jib connector 3 to move. After reaching the set height of the main arm 1, hinge the telescopic end of the telescopic connection mechanism to the main arm 1, and then use The expansion and contraction of the telescopic connection mechanism connects the jib connecting body 3 and the main arm 1 through the connecting structure, and then uses the telescopic cylinder 5 to adjust the positions of the jib connecting body 3 and the jib main body 2 relative to the main arm 1 , so that the main arm 1, the sub-arm connector 3 and the sub-arm main body 2 are connected as a whole. The disassembly process of the main arm 1 and the sub-arm is opposite to the assembly process. The operator operates the telescopic end of the telescopic connection mechanism and the main arm. The connection and the connection between the jib connection structure and the main arm connection structure simplify the operation steps of connecting the jib and the main arm, saving labor costs. Relying on the precise control of the telescopic connection mechanism and the telescopic cylinder also improves the assembly and disassembly work. efficiency.

The traction rope 4 pulls the jib connecting body 3 to move upward, and the jib connecting body 3 drives the jib main body 2 to move together. Since the length of the jib main body 2 is long, in order to ensure the flexibility of movement, the jib main body 2 is moved away from the jib connecting body. One end of the body 3 is provided with a support wheel 8. The support wheel 8 is used to support the sub-arm main body 2 when the sub-arm main body 2 moves relative to the main arm 1. One support wheel 8 can be provided, or multiple support wheels can be provided symmetrically to ensure that the sub-arm main body 2 can be supported. The stability of the arm body 2 during movement.

As shown in Figures 2 and 3, in some embodiments of the present invention, the jib connection structure specifically includes a first connection structure and a second connection structure. The first connection structure is provided on the jib connecting body 3 opposite to the first hinge point. One side is used to connect with the third connection structure of the main arm 1, and the second connection structure is provided on the side of the sub-arm connection body 3 opposite to the first hinge point, and is located above the first connection structure, as shown in Figure 2, the second connection structure is located above the first connection structure in the vertical direction and is used to connect with the fourth connection structure of the main arm 1. Among them, the first connection structure is provided at the lower end of the sub-arm connection body 3, and the second connection structure is provided at the upper end of the sub-arm connection body 3. Correspondingly, the third connection structure on the main arm 1 is provided at the lower end of the main arm 1. Corresponding to the first connection structure, the fourth connection structure on the main arm 1 is provided at the upper end of the main arm 1 and is provided corresponding to the second connection structure. The first connection structure, the second connection structure, the third connection structure and the fourth connection structure are arranged corresponding to the first connection structure. The connection structure can be a fork, a lifting eye structure or a connection seat. These structures can be provided with pin holes. When connecting, a pin shaft is inserted into the pin hole to realize the connection or the connection is achieved by bolts. The first connection structure, the second connection structure, The number of the third connection structure and the fourth connection structure may be one or more.

During the specific connection process, when the traction rope 4 pulls the sub-arm connector 3 to the first set height of the main arm 1, the first set height mentioned here is the height direction alignment of the first connection structure and the third connection structure. , and the connection position can be achieved. When the telescopic rod of the connecting rod cylinder 6 is hinged to the main arm 1, adjust the telescopicity of the connecting rod cylinder 6 to connect the first connection structure and the third connection structure. Continue to adjust the connection structure. The rod cylinder 6 expands and contracts to realize the connection between the second connection structure and the fourth connection structure.

As shown in Figures 2 to 4, in some embodiments of the present invention, the first connection structure and the second connection structure are both connection base components, and the connection base components are provided with pin holes. Specifically, the first connecting structure is two connecting seats 9 spaced at the lower end of the jib connecting body 3, and the second connecting structure is two connecting seats 9 spaced at the upper end of the jib connecting body 3. Both connecting seats 9 have Pin holes are provided.

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 invention, a guide slope is provided on the connection surface of the connection base assembly. It cooperates with the connecting surface 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 . Specifically, the two side surfaces of the two connecting seats 9 at the lower end of the jib connecting body 3 are connecting surfaces, and both sides are inclined surfaces. Similarly, the two side surfaces of the two connecting seats 9 at the upper end of the jib connecting body 3 are connecting surfaces. , both sides are inclined planes, and the inclined planes are used to provide guidance for the jib connection structure and improve the connection efficiency.

As shown in Figure 3, in some embodiments of the present invention, when the jib is placed as a separate component or when the telescopic end of the connecting rod cylinder 6 on the jib connector 3 does not require the main arm 1 to be hinged, in order to avoid the telescopic end To interfere with other components, the jib connector 3 is provided with a locking structure. When the connecting rod cylinder 6 is in a contracted state, the locking structure locks the telescopic end on the jib connector 3. Specifically, the jib connector 3 is provided with a U-shaped bracket 11. When the connecting rod cylinder 6 is not in use, the telescopic rod of the connecting rod cylinder 6 is located in the U-shaped bracket 11 to facilitate the storage of the connecting rod cylinder 6 and separate it from other parts. cause interference. The open end of the U-shaped bracket 11 is provided with a limiter. The limiter is used to limit the telescopic rod of the connecting rod cylinder 6 within the U-shaped bracket 11. The limiter can be a bolt or a pin, etc. In this embodiment, the limiter for bolt 12.

As shown in Figures 1 and 11, the second aspect of the present invention provides a boom, which includes the above-mentioned auxiliary arm, a main arm 1 and a traction rope 4. The main arm 1 is provided with a auxiliary arm connection structure for connecting with the auxiliary arm. The connected main arm connection structure and the support pin 18 for hinged connection with the telescopic end of the telescopic connection mechanism. The traction rope 4 is provided on the main arm 1 and is led out from the main arm 1. The traction rope 4 is used to connect with the sub-arm. The connecting parts of body 3 are connected.

The main arm connection structure includes a third connection structure and a fourth connection structure. The third connection structure is provided on the side of the main arm 1 close to the auxiliary arm connection body 3. The fourth connection structure is provided 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 may be two forks 10 provided at the lower end of the main arm 1 , and the fourth connection structure may be two forks provided at the upper end of the main arm 1 10. The fork 10 is also provided with a pin hole. When the connecting seat 9 is connected to the fork 10, the connecting seat 9 is inserted into the fork 10, align the two pin holes, and insert the pin into the pin hole to realize the connection. The base 9 and the connecting fork 10 have a simple structure and good versatility. They are both assembled parts, which are convenient for disassembly and replacement, and are easier to modify and use existing lifting cranes.

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 invention, the connection surface of the third connection structure and the fourth connection structure Both are provided with guide slopes. Specifically, the two inner sides of the two forks 10 at the lower end of the main arm 1 are connecting surfaces, and both sides are slopes. Similarly, the inner sides of the two forks 10 at the upper end of the main arm 1 are connecting surfaces. Both sides are connection surfaces, and both sides are slopes. The guide slopes of the connection surface where the connection base 9 is connected to the fork 10 are matched, that is, the two sides of the connection base 9 are inclined inward in the direction close to the fork 10, and Both sides of the interior of the fork 10 are inclined outward in the direction close to the connecting seat 9, and the inclined surfaces are used to guide the connection between the connecting seat 9 and the fork 10, thereby improving the connection efficiency.

The main arm 1 is provided with a pulley at one end close to the sub-arm connector 3. The traction rope 4 can bypass the pulley and be connected to the connecting frame 7 of the sub-arm connector 3. The pulley is rotationally connected to the main arm 1 through a pulley shaft 17. The pulley shaft 17 is It has a hollow structure, and the support pin 18 is arranged in the pulley shaft 17 .

As shown in Figure 4, there can be multiple pulleys, specifically an upper pulley 21 and a lower pulley 22. The upper pulley 21 is set as two steering pulleys. The upper pulley 21 is located at the upper end of the main arm 1 and is located at both ends of the upper end. Between the forks 10, the lower pulley 22 is set as two guide pulleys, located at the lower end of the main arm 1, and between the two forks 10 at the lower end. The two traction ropes 4 on the main arm 1 are respectively located on the two In the wheel grooves of two steering pulleys, the two traction ropes 4 can be turned to achieve steering while reducing the friction during the traction process. The two traction ropes 4 on the main arm 1 are respectively located in the wheel grooves of the two guide pulleys. The two traction ropes 4 implement guidance to prevent the two traction ropes 4 from deflecting during the traction process and affecting the stability during the traction process.

As shown in Figure 6, the main arm 1 is also provided with a main hoisting and traction rope 13, and the main hoisting and traction rope 13 is connected to the two traction ropes 4 through cable joints 14. Specifically, the ends of the two traction ropes 4 are respectively connected with connecting forks 15. The cable joint 14 is provided with a central axis 16, and the two connecting forks 15 are hingedly connected to the cable joint 14.

The lower pulley 22 is rotationally 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 hingedly connected to the support pin 18.

Specifically, as shown in Figure 5, the pulley shaft 17 has a hollow structure. The pulley shaft 17 is equipped with a clamping block 19 inside. The support pin 18 is fixed on the clamping block 19 through bolts. The end of the support pin 18 is also screwed through. Connected to the blocking cap 20, the telescopic rod of the connecting rod cylinder 6 is hinged to the support pin 18, and is axially limited through the blocking cap 20 to ensure the stability of the telescopic rod connection. At the same time, the structure is simple and easy to disassemble and assemble. The connecting rod The support pin 18 articulated with the telescopic rod of the oil cylinder 6 is directly installed 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 of the support pin 18, which improves the versatility of the boom connection. .

The connection process between the auxiliary arm and the main arm 1 provided by the invention is:

When it is necessary to install the jib, use a pallet truck to transport the jib to a certain position in front of the main arm 1, or use a crane that needs to install the jib to first lift the jib to the position shown in Figure 1, and then level the main arm 1 to ensure that the jib is The position where the arm is connected to the main arm 1 is in the same vertical direction.

One end of the two traction ropes 4 on the main arm 1 respectively bypasses the steering pulley and the guide pulley on the main arm 1 and is connected to the two connecting frames 7 of the jib connector 3. The other ends of the two traction ropes 4 One end is connected to the main hoisting traction rope 13 through the central shaft 16 and the cable joint 14.

Start the main winch traction rope 13 to slowly winch, and the force-bearing end of the jib connector 3 rises to the position shown in Figure 7 or Figure 8. At this time, the connector 7 is close to the lower pulley 22 of the main arm 1, and pull out the U-shaped bracket 11 Use the bolt 12 for limiting, adjust the length of the telescopic rod of the connecting rod cylinder 6 to be able to be sleeved on the bearing pin 18 in the pulley shaft 17 of the lower pulley 22, and use the blocking cap 20 to axially limit the telescopic rod. position, 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.

Continue to lift the traction rope 4 until the connecting seat 9 at the lower end of the jib connecting body 3 is aligned with the fork 10 at the lower end of the main arm 1. Adjust the length of the telescopic rod of the connecting rod cylinder 6 and move the connecting seat 9 at the lower end of the jib connecting body 3. Align it with the pin hole of the fork 10 at the lower end of the main arm 1, as shown in Figure 9. Insert the pin, remove the traction rope 4, and relieve the pressure of the connecting rod cylinder 6 by operating the hydraulic system.

Ensure that the support wheel 8 is on a hard and flat road surface, or a steel plate can be placed within the assembly range of the jib, adjust the telescopic cylinder 5, and the pin in the connecting seat 9 at the lower end of the jib connector 3 rotates until the jib The connecting seat 9 at the upper end of the connecting body 3 is aligned with the pin hole of the fork 10 at the upper end of the main arm 1, and the pin is inserted. As shown in Figure 10, the connection of the connecting structure between the main arm 1 and the auxiliary arm is completed.

Continue to adjust the telescopic cylinder 5, and lift the main arm of the jib to the state required by the working conditions, as shown in Figure 11. That is, the assembly of the jib is completed, so that the main arm 1, the jib connecting body 3 and the jib main body 2 are connected as a whole. , the jib disassembly process can be reversed according to the above steps, and will not be repeated here.

In the embodiment of the present invention, in the process of connecting the main arm 1 and the jib, 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 jib, and through the main arm 1 The traction rope 4 pulls the jib connector 3 to move and is connected to the main arm 1 through the connecting structure. The telescopic connection mechanism and the telescopic cylinder 5 are used 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 sub-arm connector 3 and the sub-arm main body 2 are connected as a whole. The disassembly process of the main arm 1 and the sub-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 simplifies the operation steps of connecting the auxiliary arm and the main arm, saving labor costs. It also improves the efficiency of assembly and disassembly by relying on the precise control of the telescopic connection mechanism and the telescopic cylinder.

A third aspect of the present invention also provides a working machine, including the above-mentioned boom. The working machine can be a large working machine with a boom structure, such as a jib crane, a straight-arm working vehicle, a cantilever working vehicle, or the like.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be used Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A secondary arm for connection to a primary arm (1), comprising:

a sub-arm main body (2);

the auxiliary arm connecting body (3) is hinged with the auxiliary arm main body (2) at a first hinge point, the auxiliary arm connecting body (3) is provided with a connecting part used for being connected with a traction rope (4), wherein the traction rope (4) is led out from the main arm (1) and used for traction of the auxiliary arm connecting body (3), an auxiliary arm connecting structure is arranged on the auxiliary arm connecting body (3), and the auxiliary arm connecting structure is used for being connected with the main arm (1);

the telescopic oil cylinder (5), one end of the telescopic oil cylinder (5) is hinged to the auxiliary arm main body (2), and the other end of the telescopic oil cylinder (5) is hinged to the auxiliary arm connecting body (3) and is used for driving the auxiliary arm connecting body (3) to rotate around the first hinge point relative to the auxiliary arm main body (2);

the telescopic connecting mechanism comprises a first end and a second end, wherein the first end is hinged to the auxiliary arm connecting body (3), and the second end is hinged to the main arm (1).

2. The auxiliary arm of claim 1, further comprising:

and a support wheel (8) which is arranged at one end of the auxiliary arm main body (2) away from the auxiliary arm connecting body (3), wherein the support wheel (8) is used for supporting the auxiliary arm main body (2) when the auxiliary arm main body (2) moves relative to the main arm (1).

3. The auxiliary arm according to claim 1 or 2, wherein,

the auxiliary arm connecting structure includes:

the first connecting structure is arranged on one side of the auxiliary arm connecting body (3) opposite to the first hinging point and is used for being connected with the third connecting structure of the main arm (1);

the second connecting structure is arranged on one side of the auxiliary arm connecting body (3) opposite to the first hinging point and is positioned above the first connecting structure and used for being connected with the fourth connecting structure of the main arm (1).

4. A secondary arm as claimed in claim 3, wherein the first and second connection structures each comprise a connector assembly having a pin bore.

5. The auxiliary arm according to claim 4, wherein guide inclined surfaces are arranged on the connecting surfaces of the connecting seat assembly and are used for being matched with the connecting surfaces of the third connecting structure and the fourth connecting structure of the main arm (1) so as to guide the connecting seat assembly to be connected with the third connecting structure and the fourth connecting structure of the main arm (1).

6. A secondary arm as claimed in claim 3, wherein the connection comprises:

the connecting frame (7), the said connecting frame (7) has connecting holes;

the 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 with the connecting frame (7).

7. The auxiliary arm according to claim 1, characterized in that the auxiliary arm connector (3) is provided with a locking structure capable of locking the second end to the auxiliary arm connector (3) when the telescopic connection is in a contracted state.

8. An arm support, comprising:

a sub-arm, which is a sub-arm according to any one of claims 1 to 7;

the main arm (1), the main arm (1) is provided with a main arm connecting structure used for being connected with a subsidiary arm connecting structure of the subsidiary arm and a support pin shaft (18) used for being hinged with a second end of a telescopic connecting mechanism of the subsidiary arm;

and the traction rope (4) is arranged on the main arm (1), is led out from the main arm (1) and is used for being connected with the connecting part of the auxiliary arm connecting body (3) of the auxiliary arm.

9. The boom of claim 8, further comprising:

the pulley is arranged on one side, close to the auxiliary arm connecting body (3), of the main arm (1), and is rotatably connected with the main arm (1) through a pulley shaft (17), the pulley shaft (17) is of a hollow structure, and the support pin shaft (18) is arranged in the pulley shaft (17).

10. A work machine comprising a boom according to claim 8 or 9.