Position adjusting device for cantilever crane and cantilever crane equipment

Abstract

The utility model discloses a position adjusting device for boom and boom equipment, the position adjusting device for boom comprises a fly boom mechanism and an adjusting mechanism, the fly boom mechanism comprises a fly boom body and a fly boom driving piece, the first end of the fly boom body is rotatably arranged on the free end of the main boom body, and the second end of the fly boom body is rotatably arranged on the free end of the main boom body. The fly arm driving part is arranged on the main arm body, the telescopic end of the fly arm driving part is in driving connection with the fly arm body, the adjusting mechanism comprises an adjusting arm body, an adjusting driving part and a connecting rod assembly, the adjusting arm body is rotatably arranged at the second end of the fly arm body, and the end, away from the fly arm body, of the adjusting arm body can be used for installation of a working device; the adjusting driving part is arranged on the fly boom body, the telescopic end of the adjusting driving part is in driving connection with the adjusting arm body through the connecting rod assembly, and when operation is executed, the working device is roughly adjusted to be close to a working position point through the fly boom mechanism, then the working device is finely adjusted to the working position point through the adjusting mechanism, and therefore the position of the working device is accurately controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and particularly relates to a position adjusting device for a boom and a boom device. Background Art

[0002] When performing high-altitude operations or tree pruning, boom devices with pitch-up-and-down capabilities are often required, such as aerial work platforms and tree pruning vehicles. Such devices generally include a vehicle body, a boom, and a working device provided on the boom. The boom includes a main boom with adjustable height and a fly boom provided at the end of the main boom. A telescopic oil cylinder is connected between the main boom and the fly boom. The pitching motion of the working device is driven by the oil cylinder to pitch the fly boom, thereby driving the pitching motion of the working device thereon. The fly boom and the sawing clamp are too heavy, and the inertia generated during movement is also large, resulting in poor micro-mobility and difficulty in precisely controlling the pitching position of the working device. Summary of the Utility Model

[0003] In view of the above defects or deficiencies, the utility model provides a position adjusting device for a boom and a boom device, aiming to solve the technical problem that it is difficult to precisely control the position of the working device in the prior art.

[0004] To achieve the above object, the utility model provides a position adjusting device for a boom. The position adjusting device for a boom includes a fly boom mechanism and an adjusting mechanism. The fly boom mechanism includes a fly boom body and a fly boom driving member. The first end of the fly boom body is rotatably provided on the free end of the main boom body. The fly boom driving member is provided on the main boom body and its telescopic end is drivingly connected to the fly boom body. The adjusting mechanism includes an adjusting arm body, an adjusting driving member, and a connecting rod assembly. The adjusting arm body is rotatably provided at the second end of the fly boom body, and the end of the adjusting arm body away from the fly boom body is available for installing the working device. The adjusting driving member is provided on the fly boom body and its telescopic end is drivingly connected to the adjusting arm body through the connecting rod assembly.

[0005] In an embodiment of the utility model, the connecting rod assembly includes a first connecting rod and a second connecting rod. The first connecting rod, the second connecting rod, and the telescopic end of the adjusting driving member are connected in series through a connecting shaft. The end of the first connecting rod away from the adjusting driving member is movably hinged to the fly boom body, and the end of the second connecting rod away from the adjusting driving member is movably hinged to the adjusting arm body.

[0006] In an embodiment of the utility model, the number of the connecting rod assemblies is two. The two connecting rod assemblies are respectively arranged on both sides of the adjusting driving member, and the telescopic end of the adjusting driving member is connected in series with both connecting rod assemblies through a connecting shaft.

[0007] In an embodiment of the utility model, a limiting shaft is further connected between the second connecting rods of the connecting rod assemblies. The limiting shaft is arranged at an interval from the connecting shaft along the extending direction of the second connecting rod.

[0008] In an embodiment of the present utility model, the second connecting rod is bent from the adjusting arm body toward the side away from the working device.

[0009] In an embodiment of the present utility model, the adjusting arm body includes a first hinged portion, a second hinged portion, and a connecting portion arranged in sequence. The connecting portion is used for connecting with the working device. The first hinged portion can extend toward the fly arm body and is formed with a first hinge point structure for hinging with the second end of the fly arm body. The second hinged portion is formed with a second hinge point structure for hinging with the second connecting rod on the upper side of the first hinge point structure.

[0010] In an embodiment of the present utility model, one end of the first hinged portion away from the second hinged portion forms an avoidance inclined surface, and the avoidance inclined surface is inclined toward the second hinged portion in the direction from bottom to top.

[0011] In an embodiment of the present utility model, the adjusting mechanism further includes a quick-change assembly arranged between the adjusting arm body and the working device. The quick-change assembly extends out with a hook and an ear plate on the side facing the adjusting arm body. The adjusting arm body is provided with a hanging rod portion for hanging the hook and a connection hole corresponding to the ear plate.

[0012] To achieve the above object, the present utility model further provides a boom device, wherein the boom device includes a chassis device, a main boom body, a working device, and the above-mentioned position adjusting device for the boom. The main boom body is arranged on the chassis device, and the position adjusting device for the boom is arranged at the free end of the main boom body and can be used for installing the working device.

[0013] In an embodiment of the present utility model, the working device is set as a working platform, and an angle sensor for detecting the inclination angle is arranged on the working platform;

[0014] Or the working device is set as a sawing clamp.

[0015] Through the above technical solutions, the position adjusting device for the boom and the boom device provided by the embodiments of the present utility model have the following beneficial effects:

[0016] When using the above-mentioned position adjusting device for the boom, since it includes a fly arm mechanism and an adjusting mechanism, the position adjustment process of the working device can be split into two operation steps: rough adjustment and fine adjustment. When performing the rough adjustment operation, the operator controls the fly arm driving member to drive the fly arm body to swing, so as to drive the working device close to the working position point. After the working device moves near the working position point, control the fly arm driving member to stop working and switch to controlling the adjusting driving member to perform the fine adjustment operation. During the fine adjustment process, the fly arm body is in a static state, the adjusting arm body has small movement inertia, and the adjusting driving member can accurately control the pitching angle of the adjusting arm body, so as to achieve the purpose of accurately controlling the position of the working device.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0018] The drawings are used to provide an understanding of the present utility model and form a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0019] Figure 1 is a schematic diagram of the position adjusting device for the boom when the working device in an embodiment of the present utility model is set as a sawing clamp;

[0020] Figure 2 is a schematic diagram of the position adjusting device for the boom when the working device in an embodiment of the present utility model is set as a working platform;

[0021] Figure 3 is Figure 2 a side view of the position adjusting device for the boom shown;

[0022] Figure 4 is a partial schematic diagram of the adjusting mechanism in an embodiment of the present utility model;

[0023] Figure 5 is a schematic diagram of the adjusting boom body in an embodiment of the present utility model.

[0024] Description of the Reference Numerals

[0025] 1 Main boom body 2 Fly boom mechanism

[0026] 21 Fly boom body 211 First connecting section

[0027] 212 Second connecting section 22 Fly boom driving member

[0028] 3 Adjusting mechanism 31 Adjusting boom body

[0029] 311 First hinged part 312 Second hinged part

[0030] 313 Connecting part 314 Rotating part

[0031] 301 Avoidance inclined surface 302 First hinge point structure

[0032] 303 Second hinge point structure 32 Adjusting driving member

[0033] 33 Link assembly 331 First link

[0034] 332 Second link 34 Connecting shaft

[0035] 35 Limiting shaft 36 Quick change assembly

[0036] 361 Mounting base 362 Hook

[0037] 363 Ear plate 41 Working platform

[0038] 42 Saw clamp 43 Angle sensor Detailed implementation mode

[0039] The following describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0040] The following describes the position adjustment device and boom equipment for the boom of the present invention with reference to the accompanying drawings.

[0041] As Figure 1 and Figure 2 shown, the present invention provides a position adjustment device for a boom. Among them, the position adjustment device for the boom includes:

[0042] The flying boom mechanism 2 includes a flying boom arm body 21 and a flying boom driving member 22. The first end of the flying boom arm body 21 is rotatably provided on the free end of the main boom arm body 1, and the flying boom driving member 22 is provided on the main boom arm body 1 and the telescopic end is drivingly connected to the flying boom arm body 21;

[0043] The adjustment mechanism 3 includes an adjustment arm body 31, an adjustment driving member 32 and a link assembly 33. The adjustment arm body 31 is rotatably provided at the second end of the flying boom arm body 21, and one end of the adjustment arm body 31 away from the flying boom arm body 21 is available for mounting the working device. The adjustment driving member 32 is provided on the flying boom arm body 21 and the telescopic end is drivingly connected to the adjustment arm body 31 through the link assembly 33.

[0044] When using the above-mentioned position adjustment device for the boom, since it includes the flying boom mechanism 2 and the adjustment mechanism 3, the position adjustment process of the working device can be split into two operation steps: rough adjustment and fine adjustment. When performing the rough adjustment operation, the operator controls the flying boom driving member 22 to drive the flying boom arm body 21 to swing, so as to drive the working device close to the working position point. After the working device moves near the working position point, control the flying boom driving member 22 to stop working and switch to controlling the adjustment driving member 32 to perform the fine adjustment operation. During the fine adjustment process, the flying boom arm body 21 is in a static state, the adjustment arm body 31 has little movement inertia, and the adjustment driving member 32 can accurately control the pitching angle of the adjustment arm body 31, so as to achieve the purpose of accurately controlling the position of the working device.

[0045] Specifically, the flying boom driving member 22 and the adjusting driving member 32 are both preferably hydraulic cylinders. Since the adjusting boom body 31 is smaller than the flying boom body 21 in terms of both external dimensions and weight, compared with the solution of directly driving the flying boom body 21, the weight of the adjusting boom body 31 driven by the adjusting driving member 32 to drive the pitching motion and the working device is smaller. Correspondingly, the pressure required for the hydraulic pump to inject hydraulic oil into the cylinder is also smaller, and the response speed of the adjusting driving member 32 is faster than that of the flying boom driving member 22, making the pitching motion of the boom more flexible. Of course, the present invention is not limited thereto. The adjusting driving member 32 can also be set as a combination of a rotary cylinder and a worm and worm gear pair. The fixed end of the rotary cylinder is hinged to the flying boom body 21, the rotary end is drivingly connected to the worm, the worm gear is sleeved on the worm and is hinged to the adjusting boom body 31. The rotary cylinder drives the worm to rotate, and the worm gear moves along the worm, thereby driving the adjusting boom body 31 to pitch.

[0046] As Figure 1 and Figure 4 shown, in the embodiment of the present invention, the connecting rod assembly 33 includes a first connecting rod 331 and a second connecting rod 332. The first connecting rod 331, the second connecting rod 332 and the telescopic end of the adjusting driving member 32 are connected in series through a connecting shaft 34. One end of the first connecting rod 331 away from the adjusting driving member 32 is movably hinged to the flying boom body 21, and one end of the second connecting rod 332 away from the adjusting driving member 32 is movably hinged to the adjusting boom body 31. The function of the connecting rod assembly 33 is to increase the pitching angle of the adjusting boom body 31. Refer to Figure 3 , when controlling the adjusting boom body 31 to rotate downward, the adjusting driving member 32 extends. While the second connecting rod 332 swings with the adjusting boom body 31, it also rotates around its hinge point with the adjusting boom body 31 toward the side where the working device is provided. Then the lower end of the first connecting rod 331 swings toward the side where the flying boom body 21 is provided, and the upper end of the second connecting rod 332 swings toward the side where the working device is provided, so that the adjusting driving member 32 also swings correspondingly toward the side where the working device is provided. Compared with the side where the flying boom body 21 is provided, the space on the side where the working device is provided is larger, which can enable the adjusting driving member 32 to have a larger swing margin, and the telescopic length of the adjusting driving member 32 is also larger. That is, by setting the second connecting rod 332, the swinging direction of the adjusting driving member 32 when it extends is changed, avoiding interference between the adjusting driving member 32 and the flying boom body 21, thereby increasing the pitching angle of the adjusting boom body 31. The flying boom body 21, the adjusting driving member 32, the second connecting rod 332 and the adjusting boom body 31 form a connecting rod mechanism, and the first connecting rod 331 serves as a virtual constraint, improving the stability of the motion of the connecting rod mechanism.

[0047] Specifically, the flying arm body 21 includes a first connecting section 211 and a second connecting section 212 that are sequentially and extendably connected from the main arm body 1 towards the adjusting arm body 31. One end of the first connecting section 211 close to the main arm body 1 is provided with a hinge point for the fixed end of the adjusting driving member 32 to be hinged, and one end of the first connecting section 211 close to the adjusting arm body 31 is provided with a hinge point for the telescopic end of the flying arm driving member 22 to be hinged, and the two hinge points are arranged diagonally; the second connecting section 212 is bent from the first connecting section 211 towards the adjusting arm body 31 and is hinged to the adjusting arm body 31. The first connecting rod 331 is hinged to the second connecting section 212, and the hinge point is located between the two hinge points of the flying arm body 21 and the adjusting arm body 31 and the flying arm driving member 22.

[0048] As Figure 4 shown, in the embodiment of the present invention, the number of the connecting rod assemblies 33 is two. The two connecting rod assemblies 33 are respectively arranged on both sides of the adjusting driving member 32, and the telescopic ends of the adjusting driving member 32 and the two connecting rod assemblies 33 are connected in series through a connecting shaft 34. The two connecting rod assemblies 33 are symmetrically arranged, so that the structural strength and the transmission stability can be improved. Specifically, among the two connecting rod assemblies 33, the first connecting rod 331 is hinged to the outside of the flying arm body 21, and the second connecting rod 332 is hinged to the outside of the adjusting arm body 31 to reduce the interference between the connecting rod assembly 33 and the flying arm body 21 and the adjusting arm body 31 during the movement process.

[0049] As Figure 4 shown, in the embodiment of the present invention, a limiting shaft 35 is further connected between the second connecting rods 332 of the connecting rod assembly 33. The limiting shaft 35 is arranged at an interval from the connecting shaft 34 along the extending direction of the second connecting rod 332. Since the limiting shaft 35 is closer to the hinge point between the second connecting rod 332 and the adjusting arm body 31 than the connecting shaft 34, during the rotation of the second connecting rod 332, the limiting shaft 35 will first abut against the adjusting arm body 31 to limit the telescopic length of the adjusting driving member 32 and avoid the adjusting driving member 32 from colliding with the adjusting arm body 31. In addition, since the limiting shaft 35 connects the two second connecting rods 332, the overall structure of the connecting rod assembly 33 is more stable.

[0050] As Figure 4 shown, in the embodiment of the present invention, the second connecting rod 332 is bent from the adjusting arm body 31 towards the side away from the working device, so that during the swinging process of the adjusting arm body 31, the interference between the second connecting rod 332 and the flying arm body 21 can be avoided.

[0051] As Figure 1 and Figure 5As shown in the figure, in the embodiment of the present utility model, the adjusting arm body 31 includes a first hinged portion 311, a second hinged portion 312, and a connecting portion 313 arranged in sequence. The connecting portion 313 is used to connect with the working device. The first hinged portion 311 can extend towards the fly arm body 21 and is formed with a first hinge point structure 302 for hinging with the second end of the fly arm body 21. The second hinged portion 312 is formed with a second hinge point structure 303 for hinging with the second connecting rod 332 on the upper side of the first hinge point structure 302. The first hinge point structure 302 and the second hinge point structure 303 are arranged in a staggered manner, avoiding interference between the second connecting rod 332 and the fly arm section during the movement process. Specifically, the first hinge point structure 302 and the second hinge point structure 303 can be set as hinge holes or hinge shafts.

[0052] Furthermore, a rotating portion 314 is also arranged between the second hinged portion 312 and the connecting portion 313. The rotating portion 314 includes an outer shell and a rotating oil cylinder arranged inside the outer shell. The outer shell is connected to the second hinged portion 312, and the rotating oil cylinder drives and connects the connecting portion 313. By controlling the rotating oil cylinder, the working device can be horizontally rotated, thereby expanding the working range of the working device.

[0053] As Figure 5 shown in the figure, in the embodiment of the present utility model, one end of the first hinged portion 311 away from the second hinged portion 312 forms an avoidance inclined surface 301, and the avoidance inclined surface 301 is inclined towards the second hinged portion 312 in the upward direction. The avoidance inclined surface 301 serves to avoid the fly arm driving member 22 and the adjusting driving member 32 on the one hand; on the other hand, by setting the inclination angle of the avoidance inclined surface 301, the maximum movement distance of the limiting rod towards the side where the fly arm body 21 is provided can be limited, and thus the maximum elevation angle of the adjusting arm body 31 and the working device can be set.

[0054] As Figure 5As shown in the figure, in the embodiment of the present utility model, the adjusting mechanism 3 further includes a quick-change assembly 36 provided between the adjusting arm body 31 and the working device. One side of the quick-change assembly 36 is connected to the working device, and the other side of the quick-change assembly 36 is detachably connected to the adjusting arm body 31. The working device can be selected as the working platform 41 or the sawing clamp 42 according to the working scenario. By setting the quick-change assembly 36, the switching between the working platform 41 and the sawing clamp 42 can be quickly realized, so that the functions of climbing and tree branch trimming are both realized, meeting the operations under different working conditions. When the working device is set as the working platform 41, the flying arm mechanism 2 is used to adjust the position of the working platform 41, and the adjusting mechanism 3 is used to level the working platform 41 to ensure the safety of the operators on the working platform 41. When the working device is set as the sawing clamp 42, the pitching angle of the sawing clamp 42 can be adjusted or it can reach the position of the tree branch by the flying arm driving member 22. Then, operate the control handle of the adjusting driving member 32 to realize the telescopic movement of the adjusting driving member 32, and drive the sawing clamp 42 to perform a pitching action through the connecting rod assembly 33 to realize the fine adjustment of the pitching angle and accurately grasp the tree branch.

[0055] Specifically, the quick-change assembly 36 includes a mounting seat 361, a hook 362 and an ear plate 363. One side of the mounting seat 361 is used to connect the working device, and the other side is formed with a cavity for a part of the connecting portion 313 of the adjusting arm body 31 to extend into. The number of both the hook 362 and the ear plate 363 is two. One hook 362 and one ear plate 363 are correspondingly arranged from top to bottom on both sides of the cavity. Hanging rod portions and connecting holes are respectively formed on both sides of the connecting portion 313 corresponding to the hook 362 and the ear plate 363. The quick-change assembly 36 is fixedly arranged on the working device. When installing the working device, control the adjusting mechanism 3 to extend the hanging rod portion into the hook 362, and then lift the quick-change assembly 36. Under the action of gravity, the ear plate hole on the ear plate 363 is aligned with the connecting hole on the connecting portion 313, and then the quick-change assembly 36 is fixed on the connecting portion 313 by passing through a pin shaft.

[0056] To achieve the above object, the present utility model further provides a boom device. Among them, the boom device includes a chassis device, a main boom body 1, a working device and the above-mentioned position adjusting device for the boom. The main boom body 1 is arranged on the chassis device, and the position adjusting device for the boom is arranged at the free end of the main boom body 1 and can be used for installing the working device. Since the boom device adopts all the technical solutions of the above embodiment, therefore, it has at least the above-mentioned beneficial effects and will not be elaborated here one by one.

[0057] As Figure 3As shown, in some embodiments of the present utility model, the boom device is an aerial work vehicle, and the working device is set as a working platform 41. An angle sensor 43 for detecting the inclination angle is provided at the bottom of the working platform 41. The boom device further includes a controller communicatively connected to the angle sensor 43 and the adjustment driving member 32 respectively. When the working platform 41 is inclined, the angle sensor 43 at the bottom of the working platform 41 will send a signal to the controller. The controller calculates the injection amount of hydraulic oil according to the inclination angle of the working platform 41 and the device parameters of the adjustment driving member 32 (set as a hydraulic cylinder), and then sends a signal carrying the injection amount information to the control valve of the adjustment driving member 32. By controlling the telescopic amount of the adjustment driving member 32, the working platform 41 can be leveled in real time, thereby realizing the automatic leveling of the working platform 41.

[0058] As Figure 2 shown, in some embodiments of the present utility model, the boom device is a tree pruning vehicle, and the working device is set as a saw clamp 42.

[0059] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present utility model, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0061] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0062] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A position adjustment device for an arm, characterized in that: The arm support position adjustment device comprises: A flying boom mechanism (2) comprises a flying boom body (21) and a flying boom driving member (22), wherein the first end of the flying boom body (21) is rotatably arranged on the free end of the main boom body (1), and the flying boom driving member (22) is arranged on the main boom body (1) and the telescopic end is drivingly connected to the flying boom body (21); The adjusting mechanism (3) comprises an adjusting arm body (31), an adjusting driving member (32) and a connecting rod assembly (33); the adjusting arm body (31) is rotatably arranged at the second end of the flying arm body (21), and an end of the adjusting arm body (31) away from the flying arm body (21) can be installed with a working device; the adjusting driving member (32) is arranged on the flying arm body (21) and the telescopic end is drivingly connected to the adjusting arm body (31) through the connecting rod assembly (33).

2. The arm position adjustment device according to claim 1, characterized in that: The connecting rod assembly (33) comprises a first connecting rod (331) and a second connecting rod (332); the first connecting rod (331), the second connecting rod (332) and the telescopic end of the adjusting drive member (32) are connected in series via a connecting shaft (34); one end of the first connecting rod (331) away from the adjusting drive member (32) is movably hinged to the flying arm body (21); and one end of the second connecting rod (332) away from the adjusting drive member (32) is movably hinged to the adjusting arm body (31).

3. The arm position adjustment device according to claim 2, characterized in that: There are two connecting rod assemblies (33), which are arranged on both sides of the adjusting drive member (32), and the telescopic end of the adjusting drive member (32) and the two connecting rod assemblies (33) are connected in series via the connecting shaft (34).

4. The arm position adjustment device according to claim 3, characterized in that: A limiting shaft (35) is also connected between the second connecting rods (332) of the two connecting rod assemblies (33), and the limiting shaft (35) is arranged at a distance from the connecting shaft (34) along the extension direction of the second connecting rod (332).

5. The arm position adjustment device according to claim 2, characterized in that: The second connecting rod (332) is bent from the adjusting arm body (31) toward a side away from the working device.

6. The arm position adjustment device according to claim 2, characterized in that: The adjusting arm body (31) comprises a first hinged portion (311), a second hinged portion (312) and a connecting portion (313) which are arranged in sequence, wherein the connecting portion (313) is used to connect with the working device, the first hinged portion (311) can extend toward the flying boom body (21) and is formed with a first hinge point structure (302) hinged to the second end of the flying boom body (21), and the second hinged portion (312) is formed with a second hinge point structure (303) hinged to the second connecting rod (332) on the upper side of the first hinge point structure (302).

7. The arm position adjustment device according to claim 6, characterized in that: An end of the first hinged portion (311) away from the second hinged portion (312) forms an avoidance inclined surface (301), and the avoidance inclined surface (301) is arranged to be inclined toward the second hinged portion (312) in a direction from bottom to top.

8. The arm position adjustment device according to any one of claims 1 to 7, characterized in that: The adjustment mechanism (3) further comprises a quick-change assembly (36) arranged between the adjustment arm body (31) and the working device, wherein the quick-change assembly (36) extends toward one side of the adjustment arm body (31) and is provided with a hook (362) and an ear plate (363), and the adjustment arm body (31) is provided with a hanging rod portion for hanging the hook (362) and a connecting hole corresponding to the ear plate (363).

9. A boom device, characterized in that: The boom equipment comprises a chassis device, a main boom body (1), a working device and a boom position adjustment device according to any one of claims 1 to 8, wherein the main boom body (1) is arranged on the chassis device, and the boom position adjustment device is arranged at the free end of the main boom body (1) and can be installed by the working device.

10. The boom equipment according to claim 9, characterized in that: The working device is configured as a working platform (41), and an angle sensor (43) for detecting an inclination angle is provided on the working platform (41); Or the working device is configured as a sawing clamp (42).

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