Telescopic arm and engineering machine

Abstract

The application provides a telescopic arm and engineering machinery, wherein the telescopic arm comprises a base, a telescopic arm section rotationally connected to the base, a first telescopic oil cylinder, one end of the first telescopic oil cylinder being connected to the telescopic arm section, the other end of the first telescopic oil cylinder being rotationally connected to the base, a second telescopic oil cylinder, one end of the second telescopic oil cylinder being connected to the telescopic arm section, the other end of the second telescopic oil cylinder being rotationally connected to the base, and a control assembly connected to the first telescopic oil cylinder and the second telescopic oil cylinder, the control assembly being used for controlling the first telescopic oil cylinder and the second telescopic oil cylinder to work, so that the first telescopic oil cylinder and the second telescopic oil cylinder drive the telescopic arm section to move.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and more specifically, to a telescopic boom and an engineering machine. Background Technology

[0002] In related technologies, construction machinery needs to be equipped with a swingable telescopic boom. Currently, the telescopic boom is driven by two hydraulic cylinders to achieve lifting, lowering, leftward, or rightward movement. In the process of developing this application, the inventors discovered the following technical problem in the prior art: the two telescopic hydraulic cylinders used to drive the telescopic boom's movement are controlled by different valve bodies. When controlling it, the control switches of different valve bodies need to be adjusted separately at different positions, which is inconvenient to operate. Summary of the Invention

[0003] To address at least one of the aforementioned technical problems, the first objective of this application is to propose a telescopic arm.

[0004] The second objective of this application is to propose an engineering machine.

[0005] According to the first objective of this application, the telescopic boom provided by this application includes: a base; a telescopic boom section rotatably connected to the base; a first telescopic cylinder, one end of which is connected to the telescopic boom section, and the other end of which is rotatably connected to the base; a second telescopic cylinder, one end of which is connected to the telescopic boom section, and the other end of which is rotatably connected to the base; and a control component connected to the first and second telescopic cylinders, the control component being used to control the operation of the first and second telescopic cylinders so that the first and second telescopic cylinders drive the telescopic boom section to move.

[0006] The telescopic boom proposed in this application includes a base, a telescopic boom section, a first telescopic cylinder, a second telescopic cylinder, and a control assembly. The telescopic boom section is rotatably connected to the base. One end of the first telescopic cylinder is connected to the telescopic boom section, and the other end is rotatably connected to the base. One end of the second telescopic cylinder is connected to the telescopic boom section, and the other end is rotatably connected to the base. By extending and retracting the first and second telescopic cylinders, the telescopic boom section can be moved relative to the base.

[0007] The control component is connected to the first and second telescopic cylinders and is used to control their operation, thereby driving the telescopic boom to move. By setting up the control component, the telescopic operation of the two cylinders can be unified and controlled by a single component. This allows operators to easily control the movement of the telescopic boom, improving operational convenience and stability, and providing more intuitive feedback on the control status of the telescopic boom during movement.

[0008] In addition, the telescopic arm in the above embodiments provided in this application may also have the following additional technical features:

[0009] In the above technical solution, preferably, the control component includes: a two-way multi-port valve, the two-way multi-port valve including a valve body, the valve body having an oil inlet, a first connecting valve port, a second connecting valve port, a third connecting valve port and a fourth connecting valve port; the first connecting valve port is connected to the rodless chamber oil inlet of the first telescopic cylinder, the second connecting valve port is connected to the rod chamber oil inlet of the first telescopic cylinder, the third connecting valve port is connected to the rodless chamber oil inlet of the second telescopic cylinder, and the fourth connecting valve port is connected to the rod chamber oil inlet of the second telescopic cylinder; a four-way handle, connected to the two-way multi-port valve, the four-way handle being used to control the on / off connection between the oil inlet and the first connecting valve port, the second connecting valve port, the third connecting valve port and the fourth connecting valve port.

[0010] In this technical solution, the control components specifically include a two-way multi-port valve and a four-way handle. The two-way multi-port valve includes a valve body, on which are provided an oil inlet, a first connecting valve port, a second connecting valve port, a third connecting valve port, and a fourth connecting valve port. The oil inlet can be connected to an external oil supply line, allowing oil to enter the valve body. The first connecting valve port is connected to the oil inlet of the rodless chamber of the first telescopic cylinder. When oil appears at the first connecting valve port, the oil can flow into the rodless chamber of the first telescopic cylinder through the corresponding oil inlet of the rodless chamber, thus supplying oil to the rodless chamber of the first telescopic cylinder.

[0011] The second connecting valve port is connected to the oil inlet of the rod chamber of the first telescopic cylinder. When oil appears at the second connecting valve port, the oil can flow into the rod chamber of the first telescopic cylinder through the oil inlet of the rod chamber of the first telescopic cylinder, thereby supplying oil to the rod chamber of the first telescopic cylinder.

[0012] The third connecting valve port is connected to the oil inlet of the rodless chamber of the second telescopic cylinder. When oil appears at the third connecting valve port, the oil can flow into the rodless chamber of the second telescopic cylinder through the oil inlet of the rodless chamber connected to it, thereby supplying oil to the rodless chamber of the second telescopic cylinder.

[0013] The fourth connecting valve port is connected to the oil inlet of the rod chamber of the second telescopic cylinder. When oil appears at the fourth connecting valve port, the oil can flow into the rod chamber of the second telescopic cylinder through the oil inlet of the rod chamber connected to it, thereby supplying oil to the rod chamber of the second telescopic cylinder.

[0014] The four-way handle is connected to a two-way multi-port valve. The four-way handle is used to control the opening and closing between the oil inlet and the first, second, third, and fourth connecting valve ports, so that the oil can flow to the first, second, third, or fourth connecting valve ports respectively, thereby supplying oil to different chambers in the first and second telescopic cylinders, so that the first and second telescopic cylinders can perform telescopic actions respectively, driving the telescopic boom connected to them to move.

[0015] The four-way handle design allows the telescopic operation of the two telescopic cylinders to be controlled by a single component. This makes it easier for operators to control the movement of the telescopic boom, improving the ease of operation and stability of the entire telescopic boom movement. The feedback on the control status of the telescopic boom during movement is also more intuitive.

[0016] In any of the above technical solutions, preferably, when the four-way handle is moved to the first position, the oil inlet is connected to the first connecting valve port and the third connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic arm to perform a lifting movement; when the four-way handle is moved to the second position, the oil inlet is connected to the second connecting valve port and the fourth connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic arm to perform a lowering movement.

[0017] In this technical solution, when the four-way handle is moved to the first position, the oil inlet connects to the first and third connecting valve ports, allowing oil to enter the rodless chamber of the first telescopic cylinder. The cylinder rod of the first telescopic cylinder is then pushed outward by the oil. Similarly, oil enters the rodless chamber of the second telescopic cylinder, and the cylinder rod of the second telescopic cylinder is pushed outward by the oil. The overall length of both telescopic cylinders increases, and one end of the telescopic boom is rotatably mounted on the base. Driven by the two telescopic cylinders, a lifting motion is performed. Specifically, the lifting motion refers to the telescopic boom rotating upwards around its connection point with the base. The side of the base with the telescopic boom is the top surface of the base, and the area above the base is above this top surface.

[0018] When the four-way handle is moved to the second position, the oil inlet connects with the second and fourth connecting valve ports, allowing oil to enter the rod chamber of the second telescopic cylinder. The piston rod of the first telescopic cylinder is then pushed into the cylinder by the oil. With oil entering the rod chamber of the second telescopic cylinder and the piston rod being pushed into the cylinder by the oil, the overall length of both telescopic cylinders shortens. One end of the telescopic boom is rotatably mounted on the base. Driven by the two telescopic cylinders, the telescopic boom descends. Specifically, the descent refers to the telescopic boom rotating downwards around its connection point with the base. The side of the base opposite to the surface where the telescopic boom is mounted is the bottom surface of the base, and the bottom of the base is below this bottom surface.

[0019] By setting up two telescopic hydraulic cylinders, the telescopic boom can be driven to perform both lifting and lowering movements. Furthermore, by moving the four-way handle to a preset position, the actions of the two telescopic hydraulic cylinders can be controlled simultaneously. The telescopic operation of the two hydraulic cylinders is unified and controlled by a single component, thereby improving the ease of operation and stability of motion control for the entire telescopic boom.

[0020] In any of the above technical solutions, preferably, when the four-way handle is moved to the third position, the oil inlet is connected to the second connecting valve port and the third connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic arm to rotate in the first direction; when the four-way handle is moved to the fourth position, the oil inlet is connected to the first connecting valve port and the fourth connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic arm to rotate in the second direction.

[0021] In this technical solution, when the four-way handle is moved to the third position, the oil inlet is connected to the second and third connecting valve ports, so that oil enters the rod chamber of the first telescopic cylinder, and the cylinder rod of the first telescopic cylinder is pushed into the cylinder by the oil. Oil enters the rodless chamber of the second telescopic cylinder, and the cylinder rod of the second telescopic cylinder is pushed out of the cylinder by the oil. The two telescopic cylinders that drive the telescopic arm joint have a length difference, with the overall length of the second telescopic cylinder being longer and the overall length of the first telescopic cylinder being shorter.

[0022] Two telescopic cylinders, one driving the telescopic boom upward and the other driving it downward, cause the telescopic boom to tend to move towards the shorter side of the telescopic cylinder. The telescopic boom, the first telescopic cylinder, and the second telescopic cylinder are all rotatably connected to the base. Therefore, under the action of the driving force, the first telescopic cylinder, the second telescopic cylinder, and the telescopic boom will rotate as a whole in the first direction, thereby driving the telescopic boom to rotate in the first direction, specifically, the left side of the telescopic boom.

[0023] When the four-way handle is moved to the fourth position, the oil inlet connects with the first and fourth connecting valve ports, allowing oil to enter the rodless chamber of the first telescopic cylinder. The cylinder rod of the first telescopic cylinder is pushed out of the cylinder by the oil. Oil enters the rod chamber of the second telescopic cylinder, and the cylinder rod of the second telescopic cylinder is pushed inward of the cylinder by the oil. The first telescopic cylinder has a longer overall length, while the second telescopic cylinder has a shorter overall length, resulting in a length difference between the two telescopic cylinders that drive the telescopic boom.

[0024] Two telescopic cylinders, one driving the telescopic boom upward and the other driving it downward, cause the telescopic boom to tend to move towards the shorter side of the telescopic cylinder. The telescopic boom, the first telescopic cylinder, and the second telescopic cylinder are all rotatably connected to the base. Therefore, under the driving force of the two telescopic cylinders, the first telescopic cylinder, the second telescopic cylinder, and the telescopic boom will rotate as a whole in a second direction, thereby driving the telescopic boom to rotate in the second direction, specifically, the right side of the telescopic boom.

[0025] By using two telescopic cylinders, the telescopic boom can not only be driven to lift and lower, but also to rotate to the left or right, thus increasing its range of motion. Furthermore, this application allows control of both telescopic cylinders by moving a four-way handle to a preset position. The telescopic operation of both cylinders is unified and controlled by a single component, thereby improving the ease of operation and stability of motion control for the entire telescopic boom.

[0026] In any of the above technical solutions, preferably, the dual-port multi-way valve further includes: a first handle, disposed on the valve body, for controlling the opening and closing of the oil inlet with the first connecting valve port and the second connecting valve port, and a four-way handle connected to the first handle; a second handle, disposed on the valve body, for controlling the opening and closing of the oil inlet with the third connecting valve port and the fourth connecting valve port, and a four-way handle connected to the second handle.

[0027] In this technical solution, the dual-port multi-way valve also includes a first handle and a second handle, both of which are mounted on the valve body. The first handle is used to control the connection and disconnection between the oil inlet and the first and second connecting valve ports. Specifically, the first handle can swing on the valve body, specifically to a first valve position, a second valve position, and a third valve position. When the first handle swings to the first valve position, the oil inlet is connected to the first connecting valve port; when the first handle swings to the second valve position, the oil inlet is connected to the second connecting valve port; and when the first handle swings to the third valve position, the oil inlet is not connected to either the first or second connecting valve port.

[0028] The second handle is used to control the connection and disconnection between the oil inlet and the third and fourth connecting valve ports. Specifically, the second handle can swing on the valve body, specifically to the fourth, fifth, and sixth valve positions. When the second handle swings to the fourth valve position, the oil inlet is connected to the third connecting valve port. When the second handle swings to the fifth valve position, the oil inlet is connected to the fourth connecting valve port. When the second handle swings to the sixth valve position, the oil inlet is not connected to either the third or fourth connecting valve port.

[0029] The four-way handle is connected to the first handle, specifically, the four-way handle is connected to the swing control valve port of the first handle. The four-way handle is also connected to the second handle, specifically, the four-way handle is connected to the swing control valve port of the second handle. When the four-way handle is in different positions, it can deliver oil with different pressure values ​​to the corresponding swing control valve ports. The oil enters the swing control valve ports of the first and second handles, thereby controlling the first and second handles to swing to different positions on the valve body. This achieves unified adjustment of the connection state between the oil inlet and multiple valve ports through a single control element.

[0030] Furthermore, by setting up a first handle and a second handle, even if the four-way handle malfunctions, the connection status between the oil inlet and multiple valve ports can be adjusted directly by adjusting the first and second handles, which improves the stability of the control component's control over the telescopic boom's movement and enhances the control component's fault resistance.

[0031] In any of the above technical solutions, preferably, there is an angle between the first telescopic cylinder and the telescopic boom, and an angle between the first telescopic cylinder and the base; there is an angle between the second telescopic cylinder and the telescopic boom, and an angle between the second telescopic cylinder and the base.

[0032] In this technical solution, there is an angle between the first telescopic cylinder and the telescopic boom, and there is also an angle between the first telescopic cylinder and the base. By setting the angle between the first telescopic cylinder and the telescopic boom and the base, the first telescopic cylinder, the telescopic boom and the base form a spatial triangle after they are connected, thereby improving the stability of the three structures after connection.

[0033] There is an angle between the second telescopic cylinder and the telescopic boom, and there is also an angle between the second telescopic cylinder and the base. By setting the angle between the second telescopic cylinder and the telescopic boom and the base, the second telescopic cylinder, the telescopic boom and the base form a spatial triangle after they are connected to each other, thereby improving the stability of the three structures after connection.

[0034] In any of the above technical solutions, preferably, the base includes: a base plate; multiple rotating joints, each rotating joint including a mounting part disposed on the base plate; and a rotating part rotatably connected to the mounting part; the telescopic boom, the first telescopic cylinder, and the second telescopic cylinder are all connected to the rotating part.

[0035] In this technical solution, the base includes a base plate and multiple rotating joints. The base plate is the supporting element of the entire base, and the rotating joints are auxiliary connecting elements used to install other components onto the base plate. After installation, the other components can rotate relative to the base plate through the rotating joints.

[0036] The rotating joint specifically includes a mounting part and a rotating part. The mounting part is mounted on the base plate, and the rotating part is connected to the mounting part and can rotate relative to the mounting part. The telescopic boom, the first telescopic cylinder, and the second telescopic cylinder are all connected to the rotating part. That is, the rotatable connection between the telescopic boom, the first telescopic cylinder, the second telescopic cylinder, and the base is achieved through the rotating joint. The rotating joint facilitates the rotation of the telescopic boom, the first telescopic cylinder, and the second telescopic cylinder.

[0037] In any of the above technical solutions, preferably, the telescopic boom section includes: a support arm, one end of which is connected to the base, and a first telescopic cylinder and a second telescopic cylinder connected to the support arm; and a telescopic inner cylinder, which is movably disposed inside the support arm, and is provided with an installation joint on the telescopic inner cylinder.

[0038] In this technical solution, the telescopic boom section specifically includes a support arm and a telescopic inner cylinder. One end of the support arm is connected to the base. The first telescopic cylinder and the second telescopic cylinder are connected to the support arm. The first telescopic cylinder and the second telescopic cylinder drive the support arm to move, thereby driving the entire telescopic boom section to move.

[0039] The telescopic inner cylinder is movably located inside the support arm, so that when the first telescopic cylinder and the second telescopic cylinder drive the support arm to move, the telescopic inner cylinder will also move synchronously with the support arm.

[0040] The telescopic inner cylinder can enter or exit the interior of the support arm. Specifically, when the telescopic boom is in the extended state, the telescopic inner cylinder moves out of the interior of the support arm, and when the telescopic boom is in the retracted state, the telescopic inner cylinder enters the interior of the support arm. Through the telescopic design, the entire telescopic boom can be used in a variety of working environments.

[0041] The telescopic inner cylinder is equipped with an installation joint, which is used for the installation of external components, so that the external components can be connected to the telescopic arm and moved by the telescopic arm.

[0042] In any of the above technical solutions, preferably, the telescopic boom section further includes: two connecting sleeves, spaced apart on the same side of the support arm, and the first telescopic cylinder and the second telescopic cylinder are rotatably connected to one of the connecting sleeves respectively.

[0043] In this technical solution, the telescopic boom also includes two connecting sleeves, which are spaced apart on the same side of the support arm. The first telescopic cylinder and the second telescopic cylinder are rotatably connected to the cylinder connecting sleeves, that is, one end of the first telescopic cylinder and one end of the second telescopic cylinder are connected to the support arm through the connecting sleeves.

[0044] By connecting the first and second telescopic cylinders to the connecting sleeve, the requirements for matching the shape of the support arm with the shapes of one end of the first and second telescopic cylinders can be reduced. Furthermore, since the first and second telescopic cylinders are rotatably connected to a connecting sleeve respectively, this rotatable connection makes it easier for the telescopic boom to lift or lower during corresponding telescopic movements.

[0045] According to the second objective of this application, the engineering machinery proposed in this application includes: a body; a telescopic boom as in any of the above technical solutions, with a base disposed on the body.

[0046] The engineering machinery proposed in this application specifically includes a body and a telescopic boom as described in any of the above technical solutions, and therefore possesses all the beneficial technical effects of the telescopic boom in any of the above technical solutions.

[0047] The construction machinery also includes a body, with a base set on the body, which enables the construction machinery to have a telescopic boom that can be raised, lowered, rotated in a first direction and rotated in a second direction. Furthermore, the telescopic boom can be controlled by a control component to make the telescopic boom more convenient to use.

[0048] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0049] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0050] Figure 1 This illustration shows one of the structural schematic diagrams of the telescopic arm in one embodiment of this application;

[0051] Figure 2 This is shown as a second schematic diagram of the telescopic arm in one embodiment of this application;

[0052] Figure 3A schematic diagram of the structure of a two-way multi-port valve in one embodiment of this application is shown;

[0053] Figure 4 A schematic diagram of the structure of a four-way handle in a control assembly according to one embodiment of this application is shown;

[0054] Figure 5 A schematic diagram of the structure of an engineering machine in one embodiment of this application is shown.

[0055] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0056] 100 Engineering machinery, 110 Telescopic boom, 112 Base, 114 Base plate, 116 Rotating joint, 118 Mounting part, 120 Rotating part, 122 Telescopic boom section, 124 Support arm, 126 Connecting sleeve, 128 Telescopic inner cylinder, 130 Mounting joint, 132 First telescopic cylinder, 134 Second telescopic cylinder, 140 Control component, 142 Two-way multi-port valve, 144 Valve body, 146 Oil inlet, 148 First connecting valve port, 150 Second connecting valve port, 152 Third connecting valve port, 154 Fourth connecting valve port, 156 First handle, 158 Second handle, 160 Four-way handle, 162 Rocker arm, 164 Conversion part, 170 Machine body. Detailed Implementation

[0057] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0058] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0059] The following reference Figures 1 to 5 This application describes telescopic booms and engineering machinery in some embodiments.

[0060] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of the present invention, a telescopic arm 110 is provided, wherein the telescopic arm 110 includes a base 112, a telescopic arm section 122, a first telescopic cylinder 132, a second telescopic cylinder 134, and a control assembly 140.

[0061] Specifically, the telescopic boom 122 is rotatably connected to the base 112. One end of the first telescopic cylinder 132 is connected to the telescopic boom 122, and the other end of the first telescopic cylinder 132 is rotatably connected to the base 112. One end of the second telescopic cylinder 134 is connected to the telescopic boom 122, and the other end of the second telescopic cylinder 134 is rotatably connected to the base 112. The control component 140 is connected to the first telescopic cylinder 132 and the second telescopic cylinder 134, and the control component 140 is used to control the operation of the first telescopic cylinder 132 and the second telescopic cylinder 134 so that the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the telescopic boom 122 to move.

[0062] In this embodiment, the telescopic boom 110 includes a base 112, a telescopic boom section 122, a first telescopic cylinder 132, a second telescopic cylinder 134, and a control assembly 140. The base 112 serves as the foundation of the telescopic boom 110, providing support for the installation of other components, such as cylinders or boom sections. The base 112 can also serve as a connecting auxiliary component to mount the entire telescopic boom 110 onto the machinery that requires its use.

[0063] The telescopic boom 122 is rotatably connected to the base 112. One end of the first telescopic cylinder 132 is connected to the telescopic boom 122, and the other end of the first telescopic cylinder 132 is rotatably connected to the base 112. One end of the second telescopic cylinder 134 is connected to the telescopic boom 122, and the other end of the second telescopic cylinder 134 is rotatably connected to the base 112. By extending and retracting the first telescopic cylinder 132 and the second telescopic cylinder 134, the telescopic boom 122 can be driven to move relative to the base 112.

[0064] The control component 140 is connected to the first telescopic cylinder 132 and the second telescopic cylinder 134, and is used to control the operation of the first telescopic cylinder 132 and the second telescopic cylinder 134 so that the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the telescopic boom 122 to move. By setting up the control component 140, the telescopic operation of the two telescopic cylinders can be unified and controlled by a single component. This allows the operator to easily control the movement of the telescopic boom 122, improving the ease of operation for controlling the movement of the entire telescopic boom 110, enhancing the stability of motion control, and providing more intuitive feedback on the control status of the telescopic boom 122 during movement.

[0065] Specifically, the control component 140 can be fixed on the base 112, thereby facilitating the adjustment of the control component 140 to control the operation of the first telescopic cylinder 132 and the second telescopic cylinder 134.

[0066] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the control component 140 includes a dual-port multi-way valve 142. The dual-port multi-way valve 142 includes a valve body 144, which has an oil inlet 146, a first connecting valve port 148, a second connecting valve port 150, a third connecting valve port 152, and a fourth connecting valve port 154. The first connecting valve port 148 is connected to the rodless chamber oil inlet of the first telescopic cylinder 132, and the second connecting valve port 150 is connected to the first telescopic cylinder 132. The rod chamber inlet of the first connecting valve 146 is connected to the rodless chamber inlet of the second telescopic cylinder 134, and the fourth connecting valve 154 is connected to the rod chamber inlet of the second telescopic cylinder 134. The four-way handle 160 is connected to the two-way multi-port valve 142 and is used to control the connection and disconnection between the oil inlet 146 and the first connecting valve 148, the second connecting valve 150, the third connecting valve 152 and the fourth connecting valve 154.

[0067] In this embodiment, the control component 140 specifically includes a dual-port multi-way valve 142 and a four-way handle 160. The dual-port multi-way valve 142 includes a valve body 144, which has an oil inlet 146, a first connecting valve port 148, a second connecting valve port 150, a third connecting valve port 152, and a fourth connecting valve port 154. The oil inlet 146 can be connected to an external oil supply line, thereby allowing oil to enter the interior of the valve body 144. The first connecting valve port 148 is connected to the rodless chamber oil inlet of the first telescopic cylinder 132. When oil appears at the first connecting valve port 148, the oil can flow into the rodless chamber of the first telescopic cylinder 132 through the corresponding connecting valve port, thereby supplying oil to the rodless chamber of the first telescopic cylinder 132.

[0068] The second connecting valve port 150 is connected to the oil inlet of the rod chamber of the first telescopic cylinder 132. When oil appears at the second connecting valve port 150, the oil can flow into the rod chamber of the first telescopic cylinder 132 through the oil inlet of the rod chamber of the first telescopic cylinder 132, thereby supplying oil to the rod chamber of the first telescopic cylinder 132.

[0069] The third connecting valve port 152 is connected to the rodless chamber oil inlet of the second telescopic cylinder 134. When oil appears at the third connecting valve port 152, the oil can flow into the rodless chamber of the second telescopic cylinder 134 through the rodless chamber oil inlet of the second telescopic cylinder 134, thereby supplying oil to the rodless chamber of the second telescopic cylinder 134.

[0070] The fourth connecting valve port 154 is connected to the oil inlet of the rod chamber of the second telescopic cylinder 134. When oil appears at the fourth connecting valve port 154, the oil can flow into the rod chamber of the second telescopic cylinder 134 through the oil inlet of the rod chamber connected to it, thereby supplying oil to the rod chamber of the second telescopic cylinder 134.

[0071] The four-way handle 160 is connected to the two-way multi-port valve 142. The four-way handle 160 can control the opening and closing of the oil inlet 146 with the first connecting valve port 148, the second connecting valve port 150, the third connecting valve port 152 and the fourth connecting valve port, so that the oil can flow to the first connecting valve port 148, the second connecting valve port 150, the third connecting valve port 152 or the fourth connecting valve port, thereby supplying oil to the different cavities in the first telescopic cylinder 132 and the second telescopic cylinder 134, so that the first telescopic cylinder 132 and the second telescopic cylinder 134 perform telescopic actions respectively, driving the telescopic arm section 122 connected to them to move.

[0072] Specifically, the first telescopic cylinder 132 and the second telescopic cylinder 134 both include a cylinder barrel and a cylinder rod. The cylinder barrel has a rod chamber and a rodless chamber. The cylinder rod is located in the rod chamber. When oil enters the rodless chamber of the two telescopic cylinders, the oil can push the cylinder rod to move out of the cylinder barrel, that is, extend it. When oil enters the rod chamber of the two telescopic cylinders, the oil can correspondingly cause the lever to move inward into the cylinder barrel, that is, retract it.

[0073] By setting up the four-way handle 160, the telescopic working process of the two telescopic cylinders can be unified and controlled by one component. The operator can easily control the movement of the telescopic boom 122, which improves the ease of operation of controlling the movement of the entire telescopic boom 110, improves the stability of motion control, and makes the feedback of the control status of the telescopic boom 122 during movement more intuitive.

[0074] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, when the four-way handle 160 is moved to the first position, the oil inlet 146 is connected to the first connecting valve port 148 and the third connecting valve port 152, and the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the telescopic arm 122 to perform a lifting movement; when the four-way handle 160 is moved to the second position, the oil inlet 146 is connected to the second connecting valve port 150 and the fourth connecting valve port 154, and the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the telescopic arm 122 to perform a lowering movement.

[0075] In this embodiment, when the four-way handle 160 is moved to the first position, the oil inlet 146 is connected to the first connecting valve port 148 and the third connecting valve port 152, allowing oil to enter the rodless chamber of the first telescopic cylinder 132. The cylinder rod of the first telescopic cylinder 132 is pushed out of the cylinder by the oil. Oil enters the rodless chamber of the second telescopic cylinder 134, and the cylinder rod of the second telescopic cylinder 134 is pushed out of the cylinder by the oil. The overall length of both telescopic cylinders increases, and one end of the telescopic arm 122 is rotatably mounted on the base 112, thereby performing a lifting movement under the drive of the two telescopic cylinders. Specifically, the lifting movement refers to the telescopic arm 122 rotating upwards around its connection point with the base 112. The side of the base 112 where the telescopic arm 112 is mounted is the top surface of the base 112, and the top of the base is above this top surface.

[0076] When the four-way handle 160 is moved to the second position, the oil inlet 146 is connected to the second connecting valve port 150 and the fourth connecting valve port 154, allowing oil to enter the rod chamber of the second telescopic cylinder 134. The cylinder rod of the first telescopic cylinder 132 is pushed into the cylinder by the oil. With oil entering the rod chamber of the second telescopic cylinder 134 and the cylinder rod being pushed into the cylinder by the oil, the overall length of both telescopic cylinders shortens. One end of the telescopic arm 122 is rotatably mounted on the base 112. Driven by the two telescopic cylinders, the telescopic arm 122 descends. Specifically, the descent refers to the telescopic arm 122 rotating downwards around its connection point with the base 112. The side of the base 112 opposite to the side where the telescopic arm 122 is mounted is the bottom surface of the base 112, and the bottom of the base 112 is below this bottom surface.

[0077] By setting two telescopic cylinders, the telescopic boom 122 can be driven to lift or lower when it is driven to move. Furthermore, by moving the four-way handle 160 to a preset position, the action of the two telescopic cylinders can be controlled simultaneously. The telescopic operation of the two cylinders is unified and controlled by a single component, thereby improving the ease of operation and stability of motion control of the entire telescopic boom 110.

[0078] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in one embodiment of this application, when the four-way handle 160 is moved to the third position, the oil inlet 146 is connected to the second connecting valve port 150 and the third connecting valve port 152, and the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the telescopic arm 122 to rotate in the first direction; when the four-way handle 160 is moved to the fourth position, the oil inlet 146 is connected to the first connecting valve port 148 and the fourth connecting valve port 154, and the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the telescopic arm 122 to rotate in the second direction.

[0079] In this embodiment, when the four-way handle 160 is moved to the third position, the oil inlet 146 is connected to the second connecting valve port 150 and the third connecting valve port 152, so that oil enters the rod chamber of the first telescopic cylinder 132, and the cylinder rod of the first telescopic cylinder 132 is pushed into the cylinder by the oil. Oil enters the rodless chamber of the second telescopic cylinder 134, and the cylinder rod of the second telescopic cylinder 134 is pushed out of the cylinder by the oil. The two telescopic cylinders that drive the telescopic arm 122 to move have a length difference, with the overall length of the second telescopic cylinder 134 being longer and the overall length of the first telescopic cylinder 132 being shorter.

[0080] Two telescopic cylinders, one driving the telescopic boom 122 upwards and the other driving it downwards, cause the telescopic boom 122 to tend to move towards the shorter side of the telescopic cylinder. The telescopic boom 122, the first telescopic cylinder 132, and the second telescopic cylinder 134 are all rotatably connected to the base 112. Therefore, under the driving force, the telescopic boom 122 tends to move towards the shorter side of the boom. Figure 2 Rotate in the first direction.

[0081] When the four-way handle 160 is moved to the fourth position, the oil inlet 146 connects with the first connecting valve port 148 and the fourth connecting valve port 154, allowing oil to enter the rodless chamber of the first telescopic cylinder 132. The cylinder rod of the first telescopic cylinder 132 is pushed out of the cylinder by the oil. Oil enters the rod chamber of the second telescopic cylinder 134, and the cylinder rod of the second telescopic cylinder 134 is pushed inward of the cylinder by the oil. The overall length of the first telescopic cylinder 132 is relatively long, and the overall length of the second telescopic cylinder 134 is relatively short, resulting in a length difference between the two telescopic cylinders that drive the telescopic boom 122.

[0082] Two telescopic cylinders, one driving the telescopic boom 122 upwards and the other driving it downwards, cause the telescopic boom 122 to tend to move towards the shorter cylinder. The telescopic boom 122, the first telescopic cylinder 132, and the second telescopic cylinder 134 are all rotatably connected to the base 112. Therefore, under the driving force of the two cylinders, the telescopic boom 122 will move towards... Figure 2 Rotate in the second direction.

[0083] By using two telescopic cylinders, in addition to driving the telescopic boom 122 to lift and lower, it can also be driven to rotate to the left or right, thus increasing the range of motion of the telescopic boom 122. Furthermore, by moving the four-way handle 160 to a preset position, the movement of the two telescopic cylinders can be controlled accordingly. The telescopic operation of the two cylinders is unified and controlled by a single component, thereby improving the ease of operation and stability of motion control for the entire telescopic boom 110.

[0084] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the dual-port multi-way valve 142 further includes: a first handle 156 disposed on the valve body 144 for controlling the opening and closing of the oil inlet 146 with the first connecting valve port 148 and the second connecting valve port 150, and a four-way handle 160 connected to the first handle 156; a second handle 158 disposed on the valve body 144 for controlling the opening and closing of the oil inlet 146 with the third connecting valve port 152 and the fourth connecting valve port 154, and a four-way handle 160 connected to the second handle 158.

[0085] In this embodiment, the dual-port multi-way valve 142 further includes a first handle 156 and a second handle 158, both of which are mounted on the valve body 144. The first handle 156 controls the connection and disconnection between the oil inlet 146 and the first connecting valve port 148 and the second connecting valve port 150. Specifically, the first handle 156 can swing on the valve body 144, specifically to a first valve position, a second valve position, and a third valve position. When the first handle 156 swings to the first valve position, the oil inlet 146 is connected to the first connecting valve port 148; when the first handle 156 swings to the second valve position, the oil inlet 146 is connected to the second connecting valve port 150; and when the first handle 156 swings to the third valve position, the oil inlet 146 is not connected to either the first connecting valve port 148 or the second connecting valve port 150.

[0086] The second handle 158 is used to control the connection and disconnection between the oil inlet 146 and the third connecting valve port 152 and the fourth connecting valve port 154. Specifically, the second handle 158 can swing on the valve body 144, specifically to the fourth valve position, the fifth valve position, and the sixth valve position. When the second handle 158 swings to the fourth valve position, the oil inlet 146 is connected to the third connecting valve port 152. When the second handle 158 swings to the fifth valve position, the oil inlet 146 is connected to the fourth connecting valve port 154. When the second handle 158 swings to the sixth valve position, the oil inlet 146 is not connected to either the third connecting valve port 152 or the fourth connecting valve port 154.

[0087] The four-way handle 160 is connected to the first handle 156, specifically, the four-way handle 160 is connected to the swing control valve port of the first handle 156. The four-way handle 160 is also connected to the second handle 158, specifically, the four-way handle 160 is connected to the swing control valve port of the second handle 158. When the four-way handle 160 is in different positions, it can deliver oil with different pressure values ​​to the corresponding swing control valve ports. The oil enters the swing control valve ports of the first handle 156 and the second handle 158, thereby controlling the first handle 156 and the second handle 158 to swing to different positions on the valve body 144. This achieves unified adjustment of the connection state between the oil inlet 146 and multiple valve ports through a single control element.

[0088] Furthermore, by setting the first handle 156 and the second handle 158, even if the four-way handle 160 malfunctions, the connection status between the oil inlet 146 and multiple valve ports can be adjusted by adjusting the first handle 156 and the second handle 158, thereby improving the stability of the control component 140 in controlling the movement of the telescopic boom 122 and enhancing the fault resistance of the control component 140.

[0089] Specifically, the four-way handle 160 includes a rocker arm 162 and a switching section 164. The switching section 164 has multiple working ports, some of which are connected to the swing control valve port of the first handle 156, and others are connected to the swing control valve port of the second handle 158. The rocker arm 162 is rotatably mounted on the switching section 164. By rotating the rocker arm 162 to the first to fourth positions, the switching section 164 can correspondingly discharge different pressure oils from the working ports to the swing control valve ports of the first handle 156 and the second handle 158, thereby controlling the first handle 156 and the second handle 158, and ultimately controlling the connection between the oil inlet 146 and different connecting valve ports.

[0090] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the first telescopic cylinder 132 has an angle with the telescopic arm 122, and the first telescopic cylinder 132 has an angle with the base 112; the second telescopic cylinder 134 has an angle with the telescopic arm 122, and the second telescopic cylinder 134 has an angle with the base 112.

[0091] In this embodiment, there is an angle between the first telescopic cylinder 132 and the telescopic arm 122, and there is also an angle between the first telescopic cylinder 132 and the base 112. By setting the angles between the first telescopic cylinder 132 and the telescopic arm 122 and the base 112, the first telescopic cylinder 132, the telescopic arm 122 and the base 112 form a triangular shape after being connected to each other, thereby improving the stability of the three structures after connection.

[0092] The second telescopic cylinder 134 has an angle with the telescopic boom 122, and the second telescopic cylinder 134 also has an angle with the base 112. By setting the second telescopic cylinder 134 with angles with both the telescopic boom 122 and the base 112, the second telescopic cylinder 134, the telescopic boom 122 and the base 112 form a triangular shape after being connected to each other, thereby improving the stability of the three structures after connection.

[0093] Specifically, the end of the second telescopic cylinder 134 connected to the telescopic boom 122 is located on the same side of the telescopic boom 122 as the end of the first telescopic cylinder 132 connected to the telescopic boom 122. The end of the second telescopic cylinder 134 connected to the base 112 is located on the same side of the base 112 as the end of the first telescopic cylinder 132 connected to the base 112. This not only avoids wasting driving force when the two telescopic cylinders are telescopic, but also improves the stability of the entire connection structure.

[0094] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the base 112 includes: a base plate 114; a plurality of rotating joints 116, each rotating joint 116 including a mounting portion 118 disposed on the base plate 114; and a rotating portion 120 rotatably connected to the mounting portion 118; the telescopic boom 122, the first telescopic cylinder 132 and the second telescopic cylinder 134 are all connected to the rotating portion 120.

[0095] In this embodiment, the base 112 includes a base plate 114 and a plurality of rotating joints 116. The base plate 114 is the supporting element of the entire base 112, and the rotating joints 116 are auxiliary connecting elements for mounting other components onto the base plate 114. After installation, other components can rotate relative to the base plate 114 through the rotating joints 116.

[0096] The rotating joint 116 specifically includes a mounting part 118 and a rotating part 120. The mounting part 118 is disposed on the base plate 114, and the rotating part 120 is connected to the mounting part 118. The rotating part 120 can rotate relative to the mounting part 118. The telescopic boom 122, the first telescopic cylinder 132 and the second telescopic cylinder 134 are all connected to the rotating part 120. That is, the rotational connection between the telescopic boom 122, the first telescopic cylinder 132 and the second telescopic cylinder 134 and the base 112 is achieved through the rotating joint 116.

[0097] By rotating the joint 116, the telescopic boom 122, the first telescopic cylinder 132, and the second telescopic cylinder 134 can rotate relative to the base plate 114.

[0098] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the telescopic boom 122 includes: a support arm 124, one end of which is connected to the base 112; a first telescopic cylinder 132 and a second telescopic cylinder 134 connected to the support arm 124; and a telescopic inner cylinder 128, which is movably disposed inside the support arm 124, and an installation joint 130 is provided on the telescopic inner cylinder 128.

[0099] In this embodiment, the telescopic boom 122 specifically includes a support arm 124 and a telescopic inner cylinder 128. One end of the support arm 124 is connected to the base 112. The first telescopic cylinder 132 and the second telescopic cylinder 134 are connected to the support arm 124. The first telescopic cylinder 132 and the second telescopic cylinder 134 drive the support arm 124 to move, thereby driving the entire telescopic boom 122 to move.

[0100] The telescopic inner cylinder 128 is movably disposed inside the support arm 124. Thus, when the first telescopic cylinder 132 and the second telescopic cylinder 134 drive the support arm 124 to move, the telescopic inner cylinder 128 will also move synchronously with the support arm 124.

[0101] The telescopic inner cylinder 128 can enter or exit the interior of the support arm 124. Specifically, when the telescopic boom section 122 is in the extended state, part of the telescopic inner cylinder 128 moves out of the interior of the support arm 124, and when the telescopic boom section 122 is in the retracted state, part of the telescopic inner cylinder 128 enters the interior of the support arm 124. Through the telescopic design, the entire telescopic boom 110 can be used in a variety of working environments.

[0102] The telescopic inner cylinder 128 is provided with an installation joint 130, which is used for the installation of external components, so that the external components can be connected to the telescopic arm 110 and driven by the telescopic arm 110 to move.

[0103] Specifically, a receiving cavity is provided inside the support arm 124, and a third telescopic cylinder is provided inside the receiving cavity. The third telescopic cylinder extends and retracts accordingly to push the telescopic inner cylinder 128 to move relative to the support arm 124.

[0104] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the telescopic boom 122 further includes two connecting sleeves 126, which are spaced apart on the same side of the support arm 124, and the first telescopic cylinder 132 and the second telescopic cylinder 134 are rotatably connected to one connecting sleeve 126 respectively.

[0105] In this embodiment, the telescopic boom 122 also includes two connecting sleeves 126, which are spaced apart on the same side of the support arm 124. The first telescopic cylinder 132 and the second telescopic cylinder 134 are rotatably connected to the cylinder connecting sleeves 126, that is, one end of the first telescopic cylinder 132 and one end of the second telescopic cylinder 134 are connected to the support arm 124 through the connecting sleeves 126.

[0106] By connecting the first telescopic cylinder 132 and the second telescopic cylinder 134 to the connecting sleeve 126, the adaptation requirements for the shape of the support arm 124 to the shapes of one end of the first telescopic cylinder 132 and one end of the second telescopic cylinder 134 can be reduced. Furthermore, the first telescopic cylinder 132 and the second telescopic cylinder 134 are rotatably connected to a connecting sleeve 126 respectively. This rotatable connection allows the telescopic arm section 122 to lift or lower when the first telescopic cylinder 132 and the second telescopic cylinder 134 perform corresponding telescopic movements.

[0107] Specifically, a connecting sleeve 126 includes two lifting lugs and a bolt. The two lifting lugs are spaced apart on the support arm 124, and each lifting lug has a mounting hole. A first connecting hole is also provided on one end of the first telescopic cylinder 132. The first telescopic cylinder 132 is inserted between the two lifting lugs, aligning the first connecting hole with the two mounting holes. Then, the bolt is inserted into the two mounting holes and the first connecting hole, completing the connection between one end of the first telescopic cylinder and the support arm. When the first telescopic cylinder 132 extends or retracts, this end correspondingly lengthens or shortens. Due to the rotation of the bolt, the support arm 124 correspondingly performs a lifting or lowering movement.

[0108] Furthermore, a second connecting hole is provided on one end of the second telescopic cylinder 134. The second telescopic cylinder 134 is inserted between the two lifting lugs, and the first connecting hole is aligned with the two mounting holes. Then, bolts are inserted into the two mounting holes and the first connecting hole, completing the connection between one end of the second telescopic cylinder 134 and the support arm 124. When the second telescopic cylinder 134 extends or retracts, this end correspondingly lengthens or shortens. Due to the rotation of the bolts, the support arm 124 accordingly performs a lifting or lowering movement.

[0109] like Figure 1 and Figure 5 As shown, in one embodiment of this application, an engineering machinery 100 is proposed, which includes: a body 170; a telescopic arm 110 as in any of the above embodiments, and a base 112 disposed on the body 170.

[0110] In this embodiment, the construction machinery 100 specifically includes a body 170 and a telescopic boom 110 as in any of the above embodiments, and therefore has all the beneficial technical effects of the telescopic boom 110 in any of the above embodiments.

[0111] Specifically, engineering machinery 100 can refer to roadheaders, tunneling machines, or rock drilling rigs. Roadheaders are multi-functional, modular, rapid tunneling equipment that integrates rapid tunneling, shield protection, synchronous anchoring, advanced drilling, and dredging functions. Tunneling machines refer to machinery used for excavating tunnels on flat surfaces.

[0112] The construction machinery 100 also includes a body 170, and a base 112 is disposed on the body 170, thereby enabling the construction machinery 100 to have a telescopic arm 110 that can be raised, lowered, rotated in a first direction and rotated in a second direction. Furthermore, the telescopic arm 110 can be controlled by a control component 140 to perform the above four directions of movement, making the use of the telescopic arm 110 more convenient.

[0113] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0114] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0115] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A telescopic arm, characterized in that, include: Base; The telescopic boom is rotatably connected to the base. The first telescopic cylinder has one end connected to the telescopic boom section and the other end rotatably connected to the base. The second telescopic cylinder has one end connected to the telescopic boom section and the other end rotatably connected to the base. A control component is connected to the first telescopic cylinder and the second telescopic cylinder. The control component is used to control the operation of the first telescopic cylinder and the second telescopic cylinder so that the first telescopic cylinder and the second telescopic cylinder drive the telescopic boom to move. The control component includes: A two-way multi-port valve, comprising a valve body, wherein the valve body is provided with an oil inlet, a first connecting valve port, a second connecting valve port, a third connecting valve port and a fourth connecting valve port; The first connecting valve port is connected to the rodless chamber oil inlet of the first telescopic cylinder, the second connecting valve port is connected to the rod chamber oil inlet of the first telescopic cylinder, the third connecting valve port is connected to the rodless chamber oil inlet of the second telescopic cylinder, and the fourth connecting valve port is connected to the rod chamber oil inlet of the second telescopic cylinder. The four-way handle is connected to the two-way multi-port valve. The four-way handle is used to control the connection and disconnection between the oil inlet and the first connecting valve port, the second connecting valve port, the third connecting valve port and the fourth connecting valve port. When the four-way handle moves to a preset position, it simultaneously controls the first telescopic cylinder and the second telescopic cylinder to perform corresponding actions.

2. The telescopic arm according to claim 1, characterized in that, When the four-way handle is moved to the first position, the oil inlet is connected to the first connecting valve port and the third connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic boom to perform a lifting movement. When the four-way handle is moved to the second position, the oil inlet is connected to the second connecting valve port and the fourth connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic boom to descend.

3. The telescopic arm according to claim 2, characterized in that, When the four-way handle is moved to the third position, the oil inlet is connected to the second connecting valve port and the third connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic arm to rotate in the first direction; When the four-way handle is moved to the fourth position, the oil inlet is connected to the first connecting valve port and the fourth connecting valve port, and the first telescopic cylinder and the second telescopic cylinder drive the telescopic boom to rotate in the second direction.

4. The telescopic arm according to claim 1, characterized in that, The dual-port multi-way valve also includes: The first handle is disposed on the valve body and is used to control the opening and closing of the oil inlet with the first connecting valve port and the second connecting valve port. The four-way handle is connected to the first handle. The second handle is located on the valve body and is used to control the opening and closing of the oil inlet, the third connecting valve port, and the fourth connecting valve port. The four-way handle is connected to the second handle.

5. The telescopic boom according to any one of claims 1 to 4, characterized in that, There is an angle between the first telescopic cylinder and the telescopic boom, and there is an angle between the first telescopic cylinder and the base; The second telescopic cylinder has an angle with the telescopic boom, and the second telescopic cylinder has an angle with the base.

6. The telescopic boom according to any one of claims 1 to 4, characterized in that, The base includes: Base plate; Multiple rotating joints, each rotating joint including a mounting portion disposed on the base plate; and A rotating part is rotatably connected to the mounting part; The telescopic boom, the first telescopic cylinder, and the second telescopic cylinder are all connected to the rotating part.

7. The telescopic boom according to any one of claims 1 to 4, characterized in that, The telescopic boom section includes: A support arm, one end of which is connected to the base, and the first telescopic cylinder and the second telescopic cylinder are connected to the support arm; A telescopic inner cylinder is movably disposed inside the support arm, and an installation joint is provided on the telescopic inner cylinder.

8. The telescopic arm according to claim 7, characterized in that, The telescopic arm also includes: Two connecting sleeves are spaced apart on the same side of the support arm, and the first telescopic cylinder and the second telescopic cylinder are rotatably connected to one of the connecting sleeves respectively.

9. An engineering machinery, characterized in that, include: Organism; The telescopic arm as described in any one of claims 1 to 8, wherein the base is disposed on the body.

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