Position detection block, cargo boom and working machine

Abstract

The utility model relates to the technical field of position detection, and discloses a position detection block, a cargo boom and an operation machine. The position detection block comprises a base and at least one induction piece, the induction piece comprises an induction body and a pre-embedded rib, and the pre-embedded rib is arranged on the induction body and embedded in the base. According to the position detection block, a protruding structure on the surface of the position detection block is reduced, the risk that the cable is hooked and snapped by the protruding structure when the position detection block is used is reduced, and the use safety of the position detection block is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to position detection technical field, concretely relates to position detection block, hoist arm and operation machine. BACKGROUND

[0002] Position detection block is used in cooperation with sensor to position the relative position relation of two components with each other.

[0003] Taking hoist arm as an example, hoist arm drives each arm section to make telescopic movement through telescopic oil cylinder, and position detection block is generally arranged on arm section, and sensor is correspondingly arranged on telescopic oil cylinder, and sensor determines the position correspondence between telescopic oil cylinder and each arm section by detecting position detection block.

[0004] Hoist arm needs to work stably under various working conditions, and arm section will inevitably vibrate under the influence of telescopic oil cylinder operation and severe external environment, which can cause bolt fastener to loosen and fall off after long-term operation, and cause hoist arm to malfunction.

[0005] In order to facilitate bolt anti-loosening and simplify the structural design of metal inductor, non-countersunk bolt is generally used to fix metal inductor in the related art, but the head of the bolt is protruding, and the cable (such as length sensor pull wire, electrical wire) in the hoist arm is easy to be hung on the bolt during the relative movement of arm section and telescopic oil cylinder, and there is a risk of being pulled off. UTILITY MODEL CONTENTS

[0006] Therefore, the utility model provides a position detection block, hoist arm and operation machine to solve the problem that the position detection block is easy to pull off the cable.

[0007] In the first aspect, the utility model provides a position detection block, including base and at least one inductor, the inductor includes inductive body and pre-embedded rib, the pre-embedded rib is arranged on the inductive body, and the pre-embedded rib is embedded in the base.

[0008] Beneficial effects: the inductor has pre-embedded rib, so that the inductor can be combined with the base by embedding connection, on the one hand, the pre-embedded rib is embedded and fixed in the base, so that the inductor and the base are tightly combined, the anti-shock performance of the position detection block is improved, and the risk of inductor falling off during operation is reduced, on the other hand, the fixation of the inductor does not need bolt fastener, which helps to make the surface of the position detection block flat without protruding parts, reduces the risk of the position detection block hanging the cable during use, and makes the position detection block not easy to pull off the cable.

[0009] In an alternative embodiment, the outer contour of the embedded rib is provided with a concave structure, which is used to engage with the base.

[0010] Beneficial effect: During the manufacturing process, a part of the base can be clamped into the concave structure, so that the base and the embedded rib are engaged together, which helps to make the inductor and the base more closely combined, further reducing the risk of the inductor falling off during operation.

[0011] In an alternative embodiment, the inductor includes a plurality of embedded ribs, each of which is arranged at intervals on the inductor body.

[0012] Beneficial effect: By providing multiple embedded ribs, multiple connection points are formed between the inductor and the base, which can improve the connection strength of the inductor and the base, further reducing the risk of the inductor falling off during operation.

[0013] In an alternative embodiment, the inductor is integrally formed with the base, and the embedded rib further includes a first connecting hole for positioning the position of the inductor during integral molding.

[0014] Beneficial effect: On the one hand, integral molding can improve the bonding strength of the inductor and the base, further improving the anti-shock performance of the position detection block and reducing the risk of the inductor falling off during operation; on the other hand, during integral molding, the inductor is first placed at a set position, and then the base is generated around the inductor, so that the base and the inductor are combined together. By providing the first connecting hole, the inductor can be accurately positioned and fixed, thereby ensuring the accuracy of the positional relationship between the inductor and the base; at the same time, due to the multiple embedded ribs, multiple first connecting holes form multiple positioning points, which can more accurately position and fix the inductor.

[0015] In an alternative embodiment, the first connecting holes of at least a part of the embedded ribs are coaxially arranged.

[0016] Beneficial effect: By using the coaxial arrangement, multiple first connecting holes can be connected and positioned by a connecting pin during integral molding, making positioning more convenient and the production and manufacturing of the position detection block more efficient.

[0017] In an alternative embodiment, the embedded rib is welded on the inductor body.

[0018] Beneficial effect: The embedded rib and the inductor body are separately processed and then welded together. The shapes of the embedded rib and the inductor body are simple, which helps to reduce the processing technology, thereby simplifying the manufacturing process of the inductor and improving the manufacturing efficiency.

[0019] In an alternative embodiment, the base comprises a sink, the inductive body is placed in the sink, and the depth of the sink is greater than or equal to the thickness of the inductive body.

[0020] Beneficial effect: the inductive body is hidden in the sink, thereby reducing the risk of cable damage caused by the exposed inductive body.

[0021] In an alternative embodiment, the base comprises a second connecting hole, the second connecting hole is a stepped hole, and the second connecting hole is used to set a countersunk bolt to fixedly mount the base.

[0022] Beneficial effect: the base is mounted by the countersunk bolt, which can further reduce the protruding part of the surface of the position detection block, thereby reducing the risk of the cable getting caught in the position detection block during the relative movement between the structure where the position detection block is located and the structure where the sensor is located, and improving the use safety of the position detection block.

[0023] In a second aspect, the utility model also provides a lifting arm, including a plurality of arm sections and telescopic oil cylinders, each arm section is sequentially nested, the arm section is provided with the position detection block of the utility model, the telescopic oil cylinder is inserted in the arm section and is used for driving the telescopic arm section, and the telescopic oil cylinder is provided with a sensor induction piece for detecting the position detection block.

[0024] Beneficial effect: the lifting arm provided by the utility model comprises the position detection block provided by the utility model, and thus has the beneficial effect brought by the position detection block.

[0025] In a third aspect, the utility model also provides a working machine, including a chassis and the lifting arm provided by the utility model, the lifting arm is arranged on the chassis, or including the position detection block provided by the utility model.

[0026] Beneficial effect: the working machine provided by the utility model comprises the position detection block provided by the utility model, and thus has the beneficial effect brought by the position detection block. DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0028] Figure 1 It is a side view of the position detection block of the utility model embodiment.

[0029] Figure 2 It is the overhead structure schematic view of position detection block of the utility model embodiment;

[0030] Figure 3 It is the rear view sectional structure schematic view of the utility model embodiment's hoist arm;

[0031] Figure 4 It is Figure 3 The local enlarged view of A area in the middle, wherein the mutual corresponding relationship of sensor and position detection block is shown;

[0032] Figure 5 It is the side view sectional structure schematic view of the utility model embodiment's hoist arm;

[0033] Figure 6 It is the side view structure schematic view of the utility model embodiment's inductive body;

[0034] Figure 7 It is the rear view structure schematic view of the utility model embodiment's inductive body;

[0035] Figure 8 It is the front view structure schematic view of position detection block of the utility model embodiment.

[0036] Mark explanation:

[0037] 1, arm section;2, position detection block;201, base;2011, second connecting hole;2012, guide slope;202, inductive piece;2021, inductive body;2022, pre-embedded rib;20221, limiting portion;20222, first connecting hole;3, telescopic oil cylinder;4, sensor. Specific implementation

[0038] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely below by combining with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the utility model.

[0039] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, elements, components, and / or integers, but do not preclude the presence or addition of one or more other features, elements, components, and / or integers.

[0040] Although the terms first, second, etc. can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first", "second", and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. In addition, in the description of the present application, unless otherwise clearly specified and limited, the terms "set", "connected" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] For the convenience of description, spatial relative terms can be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "end", "length", "inner", "outer", etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figure is turned over, the element described as "below" or "under" the other element or feature will be oriented "above" or "over" the other element or feature. Therefore, the example term "below" can include both upward and downward orientations. The mechanism can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0042] The position detection block is used for the position positioning between the components of two relative movements with the sensor, which generally includes two parts of the base provided on the component and the inductor provided on the base, and the inductor is fixed on the base by the bolt fastener. For the components such as the crane arm, the vibration is inevitable during the telescopic operation, which is easy to cause the bolt fastener to loosen and fall off after long-term operation.

[0043] In some related technologies, a non-counter sunk bolt (for example, an inner hexagonal cylinder head bolt or an outer hexagonal bolt) is used to fix the inductor, so that an elastic washer for anti-loosening can be conveniently arranged between the head of the bolt and the inductor, and at this time, the inductor does not need to be processed with a counter sink, and can be directly cut from a metal plate with a relatively thin thickness. This connection mode not only helps the anti-loosening of the bolt, but also can simplify the manufacturing process of the position detection block.

[0044] However, at this time, the head of the bolt is protruding, and during the relative movement of the two components, the exposed cable (for example, a length sensor pull wire, an electrical wire, etc.) between the components is easy to be caught by the bolt, and there is a risk of being pulled off.

[0045] The embodiments of the utility model are described below in combination with Figures 1 to 8 .

[0046] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , according to the embodiments of the utility model, on the one hand, a position detection block 2 is provided, which comprises a base 201 and at least one inductor 202, the inductor 202 comprises an inductor body 2021 and a pre-embedded rib 2022, the pre-embedded rib 2022 is arranged on the inductor body 2021, and the pre-embedded rib 2022 is embedded in the base 201.

[0047] Referring to Figure 3 , Figure 4 and Figure 5 , the use mode of the position detection block 2 is introduced by taking a hoist arm as an example. The hoist arm comprises a plurality of arm sections 1 and a telescopic oil cylinder 3, each arm section 1 is arranged in sequence in a nested mode, the position detection block 2 is arranged on the arm section 1, the telescopic oil cylinder 3 is inserted into the arm section 1 and is used to drive the arm section 1 to extend and retract, and the sensor 4 for detecting the position detection block 2 is arranged on the telescopic oil cylinder 3.

[0048] Each arm section 1 is nested together from inside to outside, during the operation of the hoist arm, the telescopic oil cylinder 3 is firstly connected and locked to the arm section 1 located in the inner layer, drives the arm section 1 to move along the axial direction of the hoist arm, so as to realize the extension and retraction of the hoist arm. After the current arm section 1 extends to a set length, the telescopic oil cylinder 3 and the current arm section 1 are unlocked, and when the telescopic oil cylinder 3 is retracted and connected and locked to other arm sections 1, the next arm section 1 is driven to move along the axial direction of the hoist arm. During the switching to other arm sections 1, the telescopic oil cylinder 3 detects the inductor 202 through the sensor 4, so as to determine the relative position of itself and the arm section 1, and accurately lock the arm section 1.

[0049] The inductive piece 202 has a pre-buried rib 2022, so as to be combined with the base 201 through embedded connection, on the one hand, the pre-buried rib 2022 is embedded and fixed in the base 201, so that the inductive piece 202 and the base 201 are tightly combined, the anti-seismic performance of the position detection block 2 is improved, and the risk of the inductive piece 202 falling off in the running process is reduced; on the other hand, the inductive piece 202 is fixed without bolt fasteners, which helps to make the surface of the position detection block 2 flat without protruding parts, reduces the risk of the position detection block 2 hanging the cable in the use process, makes the position detection block 2 not easy to break the cable, and improves the use safety of the position detection block 2.

[0050] With reference to the foregoing Figure 3 、 Figure 4 and Figure 5 , in some embodiments, a plurality of position detection blocks 2 can be arranged on one arm section 1, so as to cross-verify the relative position relationship between the telescopic oil cylinder 3 and the arm section 1, and further improve the reliability of positioning.

[0051] In addition, a plurality of installation positions of the inductive piece 202 can be arranged on one base 201, the inductive piece 202 is selectively arranged on the installation position, and the arrangement modes of the inductive pieces 202 of the respective arm sections 1 are different from each other, so that the current arm section 1 in which the telescopic oil cylinder 3 is located can be determined through the inductive signal between the sensor 4 and the inductive piece 202. Figure 5 The outermost arm section 1 can not be provided with the position detection block 2, and only the arm section 1 which needs to be connected with the telescopic oil cylinder 3 to be telescoped is provided with the position detection block 2.

[0052] It should be noted that, in addition to the crane boom shown in Figure 3 、 Figure 4 and Figure 5 , the position detection block 2 of the utility model can also be applied to other devices which need to position components, and can play the effect of avoiding the cable from being hung or even broken. For example, the position detection block 2 can be arranged on a track to avoid the cable of a cable detection trolley running on the track from being hung, and other feasible use scenarios are not described here.

[0053] It can be understood that the embedded connection between the pre-buried rib 2022 and the base 201 can be realized in various ways, for example, the pre-buried rib 2022 and the opening on the base 201 can be in interference fit, so that the pre-buried rib 2022 is embedded in the base 201 and fixed; for example, the pre-buried rib 2022 can also be embedded in the base 201 and fixed through glue bonding, integral molding and other ways, and other possible implementation ways can refer to related technologies, which are not described here.

[0054] The inductive element 202 can adopt a sheet shape, a block shape or other shapes suitable for being detected by the sensor 4. Optionally, the inductive element 202 is in a sheet shape. On one hand, the sheet-shaped inductive element 202 has a relatively thin thickness, which can be obtained by cutting a plate material of the same thickness, facilitating manufacturing. On the other hand, the inductive element 202 maintains a relatively large surface area in a direction facing the sensor 4, which is suitable for being detected by the sensor 4.

[0055] In order to improve the combination effect of the inductive element 202 and the base 201, in some embodiments, the outer contour of the embedded rib 2022 is provided with a concave structure for clamping with the base 201.

[0056] During manufacturing, a part of the base 201 can be clamped into the concave structure, so that the base 201 and the embedded rib 2022 are clamped together, which helps to make the inductive element 202 and the base 201 more closely combined, further reducing the risk of the inductive element 202 falling off during operation.

[0057] For example, referring to Figure 1 , Figure 6 and Figure 7 , the embedded rib 2022 can include a limiting portion 20221. In a direction away from the inductive body 2021, the limiting portion 20221 gradually increases in size, and a concave structure is formed between the inductive body 2021 and the limiting portion 20221.

[0058] It can be understood that the size can be at least one of a length size and a width size, as long as the limiting portion 20221 protrudes outward through the change in size, and a concave structure is formed between the inductive body 2021 and the limiting portion 20221. For example, in the embodiments shown in Figure 6 , Figure 7 , the length size L of the limiting portion 20221 gradually increases toward the distal end of the inductive body 2021, while the width size W (or the thickness of the embedded rib 2022) remains unchanged, so that the embedded rib 2022 has a more standardized shape, facilitating manufacturing by cutting a plate material (such as laser cutting or punching).

[0059] It should be noted that in the present utility model, a part of the embedded rib 2022 can be used as the limiting portion 20221, or the entire embedded rib 2022 can be used as the limiting portion 20221. For example, referring to the embodiments shown in Figure 6 , the limiting portion 20221 is only a part of the embedded rib 2022, and the size of the other part of the embedded rib 2022 can be designed flexibly according to specific needs.

[0060] Optionally, in some embodiments, the inductor 202 can further include a plurality of embedded ribs 2022, each of which is arranged at intervals on the inductor body 2021. By arranging a plurality of embedded ribs 2022, a plurality of connection points are formed between the inductor 202 and the base 201, which can improve the connection strength of the inductor 202 and the base 201, and further reduce the risk of the inductor 202 falling off during operation.

[0061] In some embodiments, the inductor 202 is integrally formed with the base 201. On the one hand, compared with the embedded connection mode of interference fit or glue bonding, integrally forming can improve the bonding strength of the inductor 202 and the base 201, further improve the anti-vibration performance of the position detection block 2, and reduce the risk of the inductor 202 falling off during operation. On the other hand, integrally forming also saves the process of assembling the inductor 202 and the base 201, and improves the manufacturing efficiency of the position detection block 2.

[0062] It can be understood that the integrally forming in the utility model can be a conventional integrally forming process in related technologies such as injection molding and additive manufacturing, which is not limited herein. In the manufacturing process, the inductor 202 is first processed, and then the inductor 202 is placed in a predetermined position, and the base 201 is formed around the inductor 202, so that the inductor 202 and the base 201 are combined together.

[0063] In some embodiments, the material of the base 201 is a plastic material (such as nylon), and the material of the inductor 202 is a metal material. At this time, the base 201 can be integrally formed with the inductor 202 by injection molding. The hardness of the plastic material is relatively low, and the cable is not easy to scratch and damage. The plastic material also has a certain elasticity, thereby improving the ability of the position detection block 2 to withstand vibration.

[0064] In some embodiments, the embedded rib 2022 further includes a first connecting hole 20222, which is used to position the inductor 202 during integrally forming.

[0065] During integrally forming, the inductor 202 is first placed in a set position, and then the base 201 is generated around the inductor 202, so that the base 201 and the inductor 202 are combined together. By arranging the first connecting hole 20222, the inductor 202 can be accurately positioned and fixed, thereby ensuring the accuracy of the positional relationship between the inductor 202 and the base 201.

[0066] Taking injection molding as an example, first, the inductor 202 needs to be processed, then the inductor 202 is placed in the mold, the first connecting hole 20222 is positioned by the connecting pin and the inductor 202 is fixed, then the mold is closed and plastic is injected, so that the plastic solidifies in the cavity of the mold to form the base 201, and finally the mold is opened and the connecting pin is removed, and the required position detection block 2 is obtained through post-processing. During the solidification process, the inductor 202 can stably maintain its own position with the help of the connecting pin, avoiding position deviation under the action of internal stress, and ensuring that the inductor 202 after molding is in the correct position.

[0067] In addition, the embedded rib 2022 can include a plurality of first connecting holes 20222, such as a plurality of first connecting holes 20222 being provided on one embedded rib 2022 at the same time, or one first connecting hole 20222 being provided on each of a plurality of embedded ribs 2022, etc. The plurality of first connecting holes 20222 form a plurality of positioning points, which can more accurately position and fix the inductor 202.

[0068] In some embodiments, the first connecting holes 20222 of at least a portion of the embedded ribs 2022 are coaxially arranged. By using the coaxial arrangement, a plurality of first connecting holes 20222 can be connected and positioned at the same time by one connecting pin during one-piece molding, making the positioning more convenient and the production and manufacturing of the position detection block 2 more efficient.

[0069] In some embodiments, the embedded rib 2022 is welded on the inductor body 2021. The embedded rib 2022 and the inductor body 2021 are separately processed and then welded together. The shapes of the embedded rib 2022 and the inductor body 2021 are simple, which helps to reduce the processing technology, thereby simplifying the manufacturing process of the inductor 202 and improving the manufacturing efficiency.

[0070] In addition to welding, the embedded rib 2022 and the inductor body 2021 can also be manufactured by bending, but at this time the embedded rib 2022 can only be arranged at the edge of the inductor body 2021, which limits the design of the inductor 202.

[0071] In some embodiments, with reference to Figure 1 , Figure 4 and Figure 8 , the base 201 includes a sink, and the inductor body 2021 is placed in the sink. The depth of the sink is greater than or equal to the thickness of the inductor body 2021. The inductor body 2021 is hidden in the sink, so that the sharp edges of the inductor body 2021 are shielded by the base 201, reducing the risk of the exposed inductor body 2021 scratching the cable.

[0072] In some embodiments, with reference to Figure 1 and Figure 2The base 201 comprises a second connecting hole 2011, which is a stepped hole, and is used to arrange a countersunk bolt to connect the base 201 and the arm section 1. The base 201 is arranged on the arm section 1 through the countersunk bolt, which can further reduce the protruding part of the surface of the position detection block 2, reduce the risk that the cable in the boom is hung on the position detection block 2 in the relative movement process of the arm section 1 and the telescopic oil cylinder 3, and improve the operation safety of the boom.

[0073] In some embodiments, with reference to Figure 8 The base 201 further comprises a guide slope 2012, which is located on the front surface of the base 201 and at both ends of the base 201 along the extension direction of the arm section 1. The guide slope 2012 can guide the cable hung on the base 201 to be separated from the base 201, and further reduce the risk that the cable is hung off by the position detection block 2.

[0074] According to the embodiments of the utility model, the second aspect provides a boom, which comprises a plurality of arm sections and a telescopic oil cylinder 3, each arm section 1 is arranged in sequence, and the position detection block 2 of the utility model is arranged on the arm section 1; the telescopic oil cylinder 3 is inserted into the arm section 1 and is used to drive the arm section 1 to be telescopic, and the sensor 4 for detecting the position detection block 2 is arranged on the telescopic oil cylinder 3.

[0075] The boom comprises the position detection block 2, and thus has the beneficial effects brought by the position detection block 2, which will not be repeated here.

[0076] According to the embodiments of the utility model, the third aspect provides a working machine, which comprises a chassis and the boom of the utility model, and the boom is arranged on the chassis, or comprises the position detection block 2 of the utility model.

[0077] The boom is telescopic on the basis of the chassis to perform a lifting task, and the working machine comprises the boom, and thus has the beneficial effects brought by the boom, which will not be repeated here.

[0078] It can be understood that the chassis can be arranged in various transport tools to make the working machine have a movement ability, for example, the chassis can be arranged on a vehicle frame, and in this case, the working machine is a crane truck, or the chassis can be arranged on a deck of a ship, and in this case, the working machine is a crane ship. Of course, the working machine can also be fixedly arranged, for example, the chassis can be fixed on a working site such as a wharf. The utility model does not limit the specific form and use scene of the working machine.

[0079] The working machine does not necessarily need to comprise the chassis and the boom, as long as the working machine has two components with relative movement and there is a cable between the components, the position detection block 2 of the utility model can be included, and the working machine has the beneficial effects brought by the position detection block 2, which will not be repeated here.

[0080] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope of the appended claims.

Claims

1. A position detection block, characterized in that, include: Base (201); At least one sensing element (202) includes a sensing body (2021) and a pre-embedded rib (2022), the pre-embedded rib (2022) being disposed on the sensing body (2021) and embedded in the base (201).

2. The position detection block according to claim 1, characterized in that, The outer contour of the pre-embedded reinforcing bar (2022) is provided with a concave structure, which is used to engage with the base (201).

3. The position detection block according to claim 1, characterized in that, The sensing element (202) includes a plurality of pre-embedded ribs (2022), and each pre-embedded rib (2022) is spaced apart on the sensing body (2021).

4. The position detection block according to claim 3, characterized in that, The sensing element (202) is integrally formed with the base (201), and the pre-embedded rib (2022) further includes a first connecting hole (20222), which is used to position the sensing element (202) during integral forming.

5. The position detection block according to claim 4, characterized in that, At least a portion of the pre-embedded reinforcing bars (2022) are coaxially arranged with the first connecting hole (20222).

6. The position detection block according to claim 1, characterized in that, The pre-embedded reinforcing bar (2022) is welded onto the sensing body (2021).

7. The position detection block according to claim 1, characterized in that, The base (201) includes a sink, in which the sensing body (2021) is placed, the depth of which is greater than or equal to the thickness of the sensing body (2021).

8. The position detection block according to claim 1, characterized in that, The base (201) includes a second connecting hole (2011), which is a stepped hole. The second connecting hole (2011) is used to install countersunk bolts to fix the base (201).

9. A crane boom, characterized in that, include: Multiple arm segments, each of the arm segments (1) is nested in sequence, and each arm segment (1) is provided with a position detection block (2) as described in any one of claims 1 to 8; A telescopic cylinder (3) is inserted into the boom (1) to drive the boom (1) to extend and retract. The telescopic cylinder (3) is equipped with a sensor (4) for detecting the position detection block (2).

10. A type of operating machinery, characterized in that, include: The chassis and the lifting boom as described in claim 9, wherein the lifting boom is mounted on the chassis; Alternatively, the position detection block according to any one of claims 1 to 8.

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