Double-variable direct-drive type 360-degree rotary telescopic arm and excavator thereof

Abstract

The utility model relates to a double-variable direct-drive type 360-degree rotation telescopic arm and an excavator with the same. The telescopic arm body comprises a large arm, a first telescopic arm, a second telescopic arm and a folding arm; the bottom of the first telescopic arm is movably connected with the large arm, the top of the first telescopic arm is movably connected with the bottom of the second telescopic arm, and the top of the second telescopic arm is movably connected with the bottom of the folding arm; the top end of the folding arm is movably connected with a swing arm; the lifting arm oil cylinder is used for controlling the inclination angle of the large arm in the vertical direction; the telescopic oil cylinder I and the telescopic oil cylinder II are respectively used for controlling the telescopic lengths of the first telescopic arm and the second telescopic arm in the axial direction; the folding oil cylinder is used for controlling the bending angle of the folding arm. The large arm, the first telescopic arm, the second telescopic arm and the folding arm are arranged on the telescopic arm body, and the corresponding arm lifting oil cylinder, the first telescopic oil cylinder, the second telescopic oil cylinder and the folding oil cylinder are arranged, so that the telescopic, inclining and bending functions of the telescopic arm are achieved, and the working radius and the working range of the telescopic arm are enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a double-variable direct-drive 360-degree slewing telescopic arm and an excavator thereof. Background Art

[0002] When loading and unloading wood, bamboo, shrubs, sugar cane and other materials in yards, farms and mountains, large machines such as excavators, forklifts and forklift attachments are indispensable. These machines can replace manual labor, saving time and improving the work efficiency of operators. At present, excavators are practical machines that are widely used in yards, farms and mountains. However, the working radius of excavators is relatively fixed, the functions are relatively single, the use is not flexible and convenient, and it is more laborious and fuel-consuming when walking and climbing.

[0003] Based on the above situation, the present invention is developed by deeply considering the many shortcomings and inconveniences of the existing excavators, and actively researching and improving them. Utility Model Content

[0004] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures specifically pointed out in the description and other drawings of the description.

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a dual variable direct drive 360° rotating telescopic arm and an excavator thereof. The utility model realizes the telescopic, tilting and bending functions of the telescopic arm by arranging a large arm, a first telescopic arm, a second telescopic arm and a folding arm on the telescopic arm body, and arranging corresponding arm raising cylinders, a first telescopic cylinder, a second telescopic cylinder and a folding cylinder, thereby increasing the working radius and working range of the telescopic arm.

[0006] The utility model provides a double variable direct drive type 360° rotating telescopic arm, including a telescopic arm body, which includes a boom, a first telescopic arm, a second telescopic arm, and a folding arm; the bottom of the bottom end of the first telescopic arm is movably connected to the boom through a pin shaft 1, the top of the first telescopic arm is movably connected to the bottom of the bottom end of the second telescopic arm through a pin shaft 2, and the top of the second telescopic arm is movably connected to the bottom end of the folding arm through a limit pin 1; the top of the folding arm is movably connected to a swing arm; an arm raising cylinder, which is used to control the tilt angle of the boom in the vertical direction; a telescopic cylinder 1, which is used to control the telescopic length of the first telescopic arm in the axial direction; a telescopic cylinder 2, which is used to control the telescopic length of the second telescopic arm in the axial direction; a folding cylinder, which is used to control the bending angle of the folding arm. The utility model realizes the telescopic, tilting, and bending functions of the telescopic arm by arranging a boom, a first telescopic arm, a second telescopic arm, and a folding arm on the telescopic arm body, and arranging corresponding arm raising cylinders, telescopic cylinders 1, telescopic cylinders 2, and folding cylinders, thereby increasing the working radius and working range of the telescopic arm.

[0007] In some embodiments, the clamp assembly includes a hanging seat and a material clamping claw connected below the hanging seat, and the hanging seat is movably connected to the top of the folding arm through a hinge seat. The setting of the clamp assembly is conducive to grabbing materials such as wood, bamboo, shrubs, and sugar cane.

[0008] In some embodiments, the fixed end of the telescopic oil cylinder 1 is fixedly connected to the outer side of the top of the boom through the pin rod 2, and the movable end is movably connected to the top of the first telescopic arm through the pin rod 3. The fixed end of the telescopic oil cylinder 2 is fixed to the bottom of the second telescopic arm through the pin rod 4, and the movable end is movably connected to the bottom of the folding arm through the pin rod 5. Installing the telescopic oil cylinder 1 and the telescopic oil cylinder 2 in this way makes assembly easier and is conducive to adjusting the telescopic length.

[0009] In some embodiments, the fixed end of the folding oil cylinder is movably connected to the bottom end of the folding arm through a pin rod 6, and the movable end is movably connected to the free end of the swing arm through a pin shaft 3. Installing the folding oil cylinder in this way makes assembly easier and is conducive to adjusting the bending angle.

[0010] In some embodiments, the diameter of the upper arm is larger than the diameter of the first telescopic arm, the diameter of the first telescopic arm is larger than the diameter of the second telescopic arm, and the diameter of the second telescopic arm is larger than the diameter of the folding arm. Designing in this way can better achieve the telescopic and bending of the telescopic arm.

[0011] In some embodiments, a limit pin is fixedly disposed at the bottom end of the first telescopic arm. The setting of the limit pin can prevent the telescopic arm and the clamp assembly from being too close to the staff, thereby causing inconvenience in operation.

[0012] In some embodiments, a connecting rod is disposed at the top of the suspension seat, one end of the connecting rod is movably connected to the free end of the swing arm, and the other end of the connecting rod is movably connected to the suspension seat. The arrangement of the connecting rod can facilitate the direction and angle of the moving clamp assembly.

[0013] In some embodiments, the clamping jaws are provided with two-jaw clamps, three-jaw clamps or four-jaw clamps. The diversity of the clamping jaws can be switched at any time according to actual needs, which is convenient, fast and efficient.

[0014] The utility model also provides an excavator, including a vehicle body and a base, and the telescopic arm described above, wherein a fixed seat and an articulated seat articulated with the fixed seat are provided on one side of the vehicle body, the large arm is movably connected to the fixed seat through the articulated seat, the fixed end of the arm-raising cylinder is movably connected to the front end of the vehicle body, and the movable end is movably connected to the inner side of the large arm through a pin rod 1. The large arm is articulated on the fixed seat, and the coordinated use of the arm-raising cylinder can facilitate the height tilting of the telescopic arm and facilitate the loading and unloading of materials.

[0015] In some embodiments, it also includes a slewing mechanism, a driving mechanism, a torque converter and a gearbox, wherein the slewing mechanism is arranged between the vehicle body and the base, the driving mechanism is used to drive the slewing mechanism to rotate, the torque converter is arranged on the base, and the gearbox is arranged on one side of the torque converter. The setting of the slewing mechanism can make the telescopic arm slew 360°, thereby reducing the number of movements of the excavator and saving costs. The dual-variable drive of the torque converter and the gearbox makes the excavator more powerful in walking and climbing, and improves efficiency.

[0016] By adopting the above technical solution, the beneficial effects of the utility model are:

[0017] 1. The utility model realizes the telescopic, tilting and bending functions of the telescopic arm by arranging a large arm, a first telescopic arm, a second telescopic arm and a folding arm on the telescopic arm body, and arranging corresponding arm raising cylinders, a first telescopic cylinder, a second telescopic cylinder and a folding cylinder, thereby increasing the working radius and working range of the telescopic arm.

[0018] 2. A clamp assembly is set at the top of the telescopic arm, and the clamping claws can be switched as needed, making the clamp assembly more practical and convenient when grabbing materials.

[0019] 3. The slewing mechanism, gearbox and torque converter are installed on the excavator, which can make the excavator more powerful in walking and climbing, and at the same time, can realize 360° rotation of the telescopic arm.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0021] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments described with reference to various figures and drawings.

[0022] In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0024] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0026] Figure 1 Schematic diagram of telescopic arms in some embodiments of the utility model;

[0027] Figure 2 It is a schematic diagram of an excavator and a telescopic arm combination in some embodiments of the utility model;

[0028] Figure 3 It is a schematic diagram of the working state of the excavator and the telescopic arm in some embodiments of the utility model;

[0029] Figure 4 It is a schematic diagram of the working state of the telescopic arm in some embodiments of the utility model.

[0030] Description of main reference numerals:

[0031] 1. Telescopic arm body;

[0032] 10. Big arm; 101. Boom-raising cylinder; 102. Articulated seat; 11. First telescopic arm; 111. Telescopic cylinder 1; 12. Second telescopic arm; 121. Telescopic cylinder 2; 13. Folding arm; 131. Folding cylinder; 132. Swing arm;

[0033] 2. Fixture assembly;

[0034] 21. Hanging seat; 211. Connecting rod; 22. Clamping claw;

[0035] 3. Excavator;

[0036] 31. Vehicle body; 32. Base; 33. Rotating mechanism; 34. Torque converter; 35. Gearbox; 36. Fixed seat. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model, but not to limit the utility model.

[0038] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0041] Reference Figure 1-Figure 2 , Figure 1 Schematic diagram of telescopic arms in some embodiments of the utility model; Figure 2 Schematic diagram of an excavator and a telescopic arm combination in some embodiments of the utility model.

[0042] According to some embodiments of the utility model, the utility model provides a double-variable direct-drive 360° rotating telescopic arm, including a telescopic arm body 1, which includes a boom 10, a first telescopic arm 11, a second telescopic arm 12, and a folding arm 13; the bottom of the bottom end of the first telescopic arm 11 is movably connected to the boom 10 through a pin shaft 1, the top of the first telescopic arm 11 is movably connected to the bottom of the bottom end of the second telescopic arm 12 through a pin shaft 2, and the top of the second telescopic arm 12 is movably connected to the bottom end of the folding arm 13 through a limit pin 1; the top of the folding arm 13 is movably connected with a swing arm 132; an arm raising cylinder 101, which is used to control the inclination angle of the boom 10 in the vertical direction; a telescopic cylinder 111, which is used to control the telescopic length of the first telescopic arm 11 in the axial direction; a telescopic cylinder 2 121, which is used to control the telescopic length of the second telescopic arm 12 in the axial direction; a folding cylinder 131, which is used to control the bending angle of the folding arm 13. The utility model realizes the telescopic, tilting and bending functions of the telescopic arm by arranging a large arm 10, a first telescopic arm 11, a second telescopic arm 12 and a folding arm 13 on a telescopic arm body 1, and arranging corresponding arm raising cylinders 101, a first telescopic cylinder 111, a second telescopic cylinder 121 and a folding cylinder 131, thereby increasing the working radius and working range of the telescopic arm.

[0043] According to some embodiments of the present invention, the clamp assembly 2 is optionally further included, and the clamp assembly 2 includes a hanging seat 21 and a material clamping claw 22 connected below the hanging seat 21, and the hanging seat 21 is movably connected to the top of the folding arm 13 through a hinge seat. The setting of the clamp assembly 2 is conducive to grabbing materials such as wood, bamboo, shrubs, and sugar cane.

[0044] According to some embodiments of the utility model, optionally, the fixed end of the telescopic oil cylinder 1 111 is fixedly connected to the outer side of the top of the boom 10 through the pin rod 2, and the movable end is movably connected to the top of the first telescopic arm 11 through the pin rod 3, and the fixed end of the telescopic oil cylinder 2 121 is fixed to the bottom end of the second telescopic arm 12 through the pin rod 4, and the movable end is movably connected to the bottom end of the folding arm 13 through the pin rod 5. Installing the telescopic oil cylinder 1 111 and the telescopic oil cylinder 2 121 in this way makes assembly easier and is conducive to adjusting the telescopic length.

[0045] According to some embodiments of the present invention, optionally, the fixed end of the folding cylinder 131 is movably connected to the bottom end of the folding arm 13 through a pin 6, and the movable end is movably connected to the free end of the swing arm 132 through a pin 3. Installing the folding cylinder 131 in this way makes assembly easier and is conducive to adjusting the bending angle.

[0046] According to some embodiments of the utility model, optionally, the diameter of the upper arm 10 is larger than the diameter of the first telescopic arm 11, the diameter of the first telescopic arm 11 is larger than the diameter of the second telescopic arm 12, and the diameter of the second telescopic arm 12 is larger than the diameter of the folding arm 13. Designing in this way can better realize the telescopic and bending of the telescopic arm.

[0047] According to some embodiments of the present invention, optionally, a limit pin is fixedly disposed at the bottom end of the first telescopic arm 11. The provision of the limit pin can prevent the telescopic arm and the clamp assembly 2 from being too close to the staff, causing inconvenience in operation.

[0048] According to some embodiments of the utility model, optionally, a connecting rod 211 is provided at the top of the hanging seat 21, one end of the connecting rod 211 is movably connected to the free end of the swing arm 132, and the other end of the connecting rod 211 is movably connected to the hanging seat 21. The setting of the connecting rod 211 can facilitate the direction and angle of the mobile clamp assembly 2.

[0049] According to some embodiments of the present invention, the clamping claw 22 is optionally provided with a two-claw clamp, a three-claw clamp or a four-claw clamp. The diversity of the clamping claw 22 can be switched at any time according to actual needs, which is convenient, fast and efficient.

[0050] Reference Figure 2-Figure 4 , Figure 2 It is a schematic diagram of an excavator and a telescopic arm combination in some embodiments of the utility model; Figure 3 It is a schematic diagram of the working state of the excavator and the telescopic arm in some embodiments of the utility model; Figure 4 It is a schematic diagram of the working state of the telescopic arm in some embodiments of the utility model.

[0051] According to some embodiments of the utility model, the utility model provides an excavator 3, including a vehicle body 31 and a base 32, and the telescopic arm described above, a fixed seat 36 and an articulated seat 102 articulated with the fixed seat 36 are provided on one side of the vehicle body 31, a large arm 10 is movably connected to the fixed seat 36 through the articulated seat 102, a fixed end of an arm raising cylinder 101 is movably connected to the front end of the vehicle body 31, and a movable end is movably connected to the inner side of the large arm 10 through a pin rod 1. The large arm 10 is articulated on the fixed seat 36, and the coordinated use of the arm raising cylinder 101 can facilitate the height tilting of the telescopic arm and facilitate the loading and unloading of materials.

[0052] According to some embodiments of the utility model, optionally, it further includes a slewing mechanism 33, a driving mechanism, a torque converter 34 and a gearbox 35, the slewing mechanism 33 is arranged between the vehicle body 31 and the base 32, the driving mechanism is used to drive the slewing mechanism 33 to rotate, the torque converter 34 is arranged on the base 32, and the gearbox 35 is arranged on one side of the torque converter 34. The setting of the slewing mechanism 33 can make the telescopic arm 360° slew, thereby reducing the number of movements of the excavator 3, saving costs, and the dual-variable drive of the torque converter 34 and the gearbox 35 makes the excavator 3 walk and climb more powerfully, improving efficiency.

[0053] Example 1

[0054] Reference Figure 1 The present embodiment provides a double-variable direct-drive 360° rotating telescopic arm, wherein the telescopic arm body 1 comprises a boom 10, a first telescopic arm 11, a second telescopic arm 12, and a folding arm 13. The diameter of the boom 10 is greater than the diameter of the first telescopic arm 11, the diameter of the first telescopic arm 11 is greater than the diameter of the second telescopic arm 12, the diameter of the second telescopic arm 12 is greater than the diameter of the folding arm 13, a limit pin is fixedly arranged at the bottom end of the first telescopic arm 11, and at the same time, the bottom of the bottom end of the first telescopic arm 11 is movably connected to the boom 10 through a pin shaft 1, the top end of the first telescopic arm 11 is movably connected to the bottom end of the second telescopic arm 12 through a pin shaft 2, the top end of the second telescopic arm 12 is movably connected to the bottom end of the folding arm 13 through a limit pin 1, and the top end of the folding arm 13 is movably connected to a swing arm 132;

[0055] The arm raising cylinder 101 is used to control the tilt angle of the arm 10 in the vertical direction;

[0056] The telescopic oil cylinder 111 is used to control the telescopic length of the first telescopic arm 11 in the axial direction, and its fixed end is fixedly connected to the outer side surface of the top of the big arm 10 through the pin rod 2, and its movable end is movably connected to the top of the first telescopic arm 11 through the pin rod 3;

[0057] The second telescopic oil cylinder 121 is used to control the telescopic length of the second telescopic arm 12 in the axial direction, and its fixed end is fixed to the bottom end of the second telescopic arm 12 through a pin rod 4, and its movable end is movably connected to the bottom end of the folding arm 13 through a pin rod 5;

[0058] The folding cylinder 131 is used to control the bending angle of the folding arm 13, and its fixed end is movably connected to the bottom end of the folding arm 13 through a pin rod 6, and its movable end is movably connected to the free end of the swing arm 132;

[0059] In addition, a clamp assembly 2 is provided at the top of the telescopic arm body 1, and the clamp assembly 2 includes a hanging seat 21 and a clamping claw 22 connected to the bottom of the hanging seat 21. The hanging seat 21 is movably connected to the top of the folding arm 13 through a hinge seat. A connecting rod 211 is provided at the top of the hanging seat 21. One end of the connecting rod 211 is movably connected to the free end of the swing arm 132, and the other end of the connecting rod 211 is movably connected to the hanging seat 21. The clamping claw 22 is provided with a two-claw clamp, a three-claw clamp or a four-claw clamp.

[0060] Example 2

[0061] Reference Figure 2-Figure 4 This embodiment provides an excavator. The difference between this embodiment and embodiment 1 is that:

[0062] The excavator 3 includes a body 31, a base 32, a telescopic arm, a slewing mechanism 33, a driving mechanism, a torque converter 34 and a gearbox 35. A fixed seat 36 and an articulated seat 102 hinged to the fixed seat 36 are provided on one side of the body 31. The boom 10 is movably connected to the fixed seat 36 through the articulated seat 102. The fixed end of the arm raising cylinder 101 is movably connected to the front end of the body 31, and the movable end is movably connected to the inner side of the boom 10 through a pin rod 1. The slewing mechanism 33 is arranged between the body 31 and the base 32. The driving mechanism is used to drive the slewing mechanism 33 to rotate. The torque converter 34 is arranged on the base 32, and the gearbox 35 is arranged on one side of the torque converter 34.

[0063] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0064] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the utility model. Therefore, the phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0065] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the utility model. However, those skilled in the relevant art will understand that the utility model can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A double variable direct drive 360° rotating telescopic arm, characterized in that: include: The telescopic arm body comprises a main arm, a first telescopic arm, a second telescopic arm and a folding arm; The bottom of the bottom end of the first telescopic arm is movably connected to the large arm through a pin shaft 1, the top of the first telescopic arm is movably connected to the bottom of the bottom end of the second telescopic arm through a pin shaft 2, and the top of the second telescopic arm is movably connected to the bottom end of the folding arm through a limit pin 1; the top of the folding arm is movably connected to a swing arm; An arm raising cylinder, which is used to control the tilt angle of the arm in the vertical direction; Telescopic cylinder 1, used for controlling the telescopic length of the first telescopic arm in the axial direction; Telescopic cylinder 2, used for controlling the telescopic length of the second telescopic arm in the axial direction; The folding cylinder is used to control the bending angle of the folding arm.

2. The telescopic arm according to claim 1, characterized in that: It also includes a clamp assembly, which includes a hanging seat and a clamping claw connected below the hanging seat, and the hanging seat is movably connected to the top end of the folding arm through a hinge seat.

3. The telescopic arm according to claim 1, characterized in that: The fixed end of the telescopic cylinder one is fixedly connected to the outer side surface of the top of the boom through pin rod two, and the movable end is movably connected to the top of the first telescopic arm through pin rod three. The fixed end of the telescopic cylinder two is fixed to the bottom end of the second telescopic arm through pin rod four, and the movable end is movably connected to the bottom end of the folding arm through pin rod five.

4. The telescopic arm according to claim 1, characterized in that: The fixed end of the folding oil cylinder is movably connected to the bottom end of the folding arm through a pin rod six, and the movable end is movably connected to the free end of the swing arm through a pin shaft three.

5. The telescopic arm according to claim 1, characterized in that: The diameter of the upper arm is larger than the diameter of the first telescopic arm, the diameter of the first telescopic arm is larger than the diameter of the second telescopic arm, and the diameter of the second telescopic arm is larger than the diameter of the folding arm.

6. The telescopic arm according to claim 1, characterized in that: A limiting pin is fixedly provided at the bottom end of the first telescopic arm.

7. The telescopic arm according to claim 2, characterized in that: A connecting rod is arranged at the top end of the hanging seat, one end of the connecting rod is movably connected to the free end of the swing arm, and the other end of the connecting rod is movably connected to the hanging seat.

8. The telescopic arm according to claim 2, characterized in that: The clamping claws are provided with two-claw clamps, three-claw clamps or four-claw clamps.

9. An excavator, comprising a body and a base, wherein a fixed seat and an articulated seat articulated to the fixed seat are arranged on one side of the body, characterized in that: It comprises the telescopic arm as described in any one of claims 1 to 7, wherein the boom is movably connected to the fixed seat via an articulated seat, the fixed end of the arm raising cylinder is movably connected to the front end of the vehicle body, and the movable end is movably connected to the inner side surface of the boom via a pin rod.

10. An excavator according to claim 9, characterized in that: It also includes a slewing mechanism, a driving mechanism, a torque converter and a gearbox. The slewing mechanism is arranged between the vehicle body and the base. The driving mechanism is used to drive the slewing mechanism to rotate. The torque converter is arranged on the base. The gearbox is arranged on one side of the torque converter.

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