Position detection block, lifting arm and working machine

Abstract

Position detection block, characterized in that it comprises the following: a base (201); at least one sensor element (202), wherein the sensor element (202) comprises a sensor body (2021) and a pre-embedded rib (2022), wherein the pre-embedded rib (2022) is arranged on the sensor body (2021) and the pre-embedded rib (2022) is embedded in the base (201).

Description

Technical area

[0001] The present utility model relates to the technical field of position detection, in particular a position detection block, a lifting arm and a working machine. Background technology

[0002] Position detection blocks are designed to work in conjunction with a sensor to determine the relative positional relationship between two moving parts. Position detection blocks typically use metal sensors for sensing, and these metal sensors are attached to the base of the position detection block with screws.

[0003] Using the lifting arm as an example, it can be shown that the lifting arm is moved by telescopic cylinders to extend and retract the individual arm segments. Position detection blocks are typically arranged on the arm segments, and sensors are correspondingly arranged on the telescopic cylinders. The sensors determine the positional correspondence between the telescopic cylinders and the individual arm segments by detecting the position detection blocks. By changing the mounting position of the metal sensor, different arm segments can also be distinguished using the position detection block.

[0004] Lifting arms must function reliably under various operating conditions. Due to the operation of the telescopic cylinders and harsh environmental conditions, the arm segment inevitably vibrates, which can cause screws and fasteners to loosen and fall out after prolonged use, ultimately leading to the failure of the lifting arm.

[0005] To prevent screws from loosening and to simplify the design of metal sensors, countersunk screws are frequently used in relevant technologies for fastening metal sensors. However, in this case, the screw head protrudes, and during the relative movement of the arm segment and telescopic cylinder, cables located in the lifting arm (such as the length sensor cable and electrical wires) can easily become entangled on the screw, posing a risk of being torn off. Content of the utility model

[0006] Against this background, the present utility model provides a position detection block, a lifting arm and a working machine to solve the problem of the position detection block's susceptibility to cable breaks.

[0007] In a first aspect, the present utility model provides a position detection block comprising a base and at least one sensor element, wherein the sensor element comprises a sensor body and a pre-embedded rib, the pre-embedded rib being arranged on the sensor body and the pre-embedded rib being embedded in the base.

[0008] Advantageous effects: The sensor element has pre-embedded ribs, allowing it to be integrated into the socket via an embedded connection. Firstly, the pre-embedded ribs are embedded and fixed in the socket, creating a tight connection between the sensor element and the socket. This improves the seismic performance of the position detection block and reduces the risk of the sensor element falling off during operation. Secondly, the sensor element does not require a screw fastening element, resulting in a flat, protruding surface for the position detection block. This reduces the risk of the position detection block becoming entangled in the cable during use, thus preventing the position detection block from easily tearing the cable.

[0009] In an optional embodiment, the outer contour of the pre-embedded rib has a concave structure, wherein the concave structure is designed to form a positive fit with the base.

[0010] Advantageous effects: During the manufacturing process, part of the base can be inserted into the concave structure, causing the base to interlock with the pre-embedded rib, resulting in a closer connection between the sensor element and the base and further reducing the risk of the sensor element falling off during operation.

[0011] In an optional embodiment, the sensor element comprises several pre-embedded ribs, the individual pre-embedded ribs being arranged at intervals on the sensor body.

[0012] Advantageous effects: The arrangement of several pre-embedded ribs creates multiple connection points between the sensor element and the base, which can improve the connection strength between the sensor element and the base and further reduce the risk of the sensor element falling off during operation.

[0013] In an optional embodiment, the sensor element and the base are formed in one piece, and the pre-embedded rib further comprises a first connecting bore, wherein the first connecting bore is designed for positioning the sensor element during the one-piece forming process.

[0014] Advantageous effects: Firstly, the one-piece molding improves the adhesive strength between the sensor element and the base, optimizes the seismic stability of the position detection block, and reduces the risk of the sensor element falling off during operation; secondly, in the one-piece molding process, the sensor element is first positioned at the set location, and then the base is formed around the sensor element, so that the base and sensor element are connected. The first connecting hole allows the sensor element to be precisely positioned and fixed, thus ensuring the exact positional relationship between the sensor element and the base; since several pre-embedded ribs are provided and several first connecting holes create multiple positioning points, the sensor element can be positioned and fixed more accurately.

[0015] In an optional embodiment, at least some of the first connecting bores of the pre-embedded ribs are arranged coaxially to each other.

[0016] Advantageous effects: By using a coaxial placement method, multiple first connecting holes can be connected and positioned simultaneously via a single connecting pin during the one-piece forming process, simplifying positioning and making the production and manufacturing of position detection blocks more efficient.

[0017] In an optional embodiment, the pre-embedded rib is welded to the sensor body.

[0018] Advantageous effects: The pre-embedded ribs and the sensor body are manufactured separately and then welded together, with the ribs and the sensor body having a simple shape, which helps to reduce machining effort, thereby simplifying the production of the sensor components and increasing manufacturing efficiency.

[0019] In an optional embodiment, the base includes a recess, wherein the sensor body is arranged in the recess and the depth of the recess is greater than or equal to the thickness of the sensor body.

[0020] Advantageous effects: The sensor body is hidden in the recess, reducing the risk of the exposed sensor body scratching and damaging the cable.

[0021] In an optional embodiment, the base includes a second connecting bore, wherein the second connecting bore is designed as a stepped bore and the second connecting bore is designed for the insertion of countersunk screws for fastening the base.

[0022] Advantageous effects: The base is fastened with countersunk screws, which can further reduce the protruding section on the surface of the position detection block, reducing the risk of the cable becoming entangled on the position detection block during relative movements between the structure in which the position detection block is located and the structure in which the sensor is located, and improving the safety of the position detection block in operation.

[0023] In a second aspect, the present utility model provides a lifting arm comprising several arm segments and a telescopic cylinder, wherein the individual arm segments are arranged telescopically within one another and each arm segment is provided with a position detection block as provided in the present utility model; wherein the telescopic cylinder is inserted into the arm segment and is designed to extend or retract the arm segment, and the telescopic cylinder is provided with a sensor element of the sensor for detecting the position detection block.

[0024] Advantageous effects: The lifting arm provided in the present utility model includes the position detection block provided in the present utility model and therefore has the advantageous effects caused by the position detection block, which are not explained in detail here.

[0025] In a third aspect, the present utility model provides a working machine comprising a chassis and a lifting arm provided in the present utility model, wherein the lifting arm is arranged on the chassis; or a position detection block provided in the present utility model.

[0026] Advantageous effects: The working machine provided for in the present utility model includes the position detection block provided for in the present utility model and therefore has the advantageous effects caused by the position detection block, which are not explained in detail here. Figures

[0027] To more clearly illustrate the specific embodiments of the present utility model and the prior art technical solutions, the figures necessary for use in these specific embodiments and the prior art description are briefly presented below. The figures described below obviously represent some embodiments of the present utility model. General technical personnel in this field can easily create further figures based on these figures without any creative effort. Fig. Figure 1 is a side view-section-structural representation of the position detection block according to an embodiment of the present utility model; Fig. Figure 2 is a top-view structural representation of the position detection block according to an embodiment of the present utility model; Fig. Figure 3 is a rear view sectional view structural representation of the lifting arm according to an embodiment of the present utility model; Fig. Figure 4 is an enlarged view of area A in Fig. 3, which shows the mutual correspondence between the sensor and the position detection block; Fig. Figure 5 is a side view-section-structural representation of the lifting arm according to an embodiment of the present utility model; Fig. Figure 6 is a side view structural representation of the sensor body according to an embodiment of the present utility model; Fig. Figure 7 is a rear view structural representation of the sensor body according to an embodiment of the present utility model; Fig. Figure 8 is a front view structural representation of the position detection block according to an embodiment of the present utility model. Reference symbols in the figures::

[0028] 1. Arm segment; 2. Position detection block; 201. Base; 2011. Second connecting bore; 2012. Guide ramp; 202. Sensor element; 2021. Sensor body; 2022. Pre-embedded rib; 20221. Limiting section; 20222. First connecting bore; 3. Telescopic cylinder; 4. Sensor. Specific embodiments

[0029] To clarify the purpose, technical solution, and advantages of the embodiments of this utility model, the technical solutions in these embodiments are described clearly and completely below in conjunction with the accompanying drawings. It is evident that the described embodiments represent some of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all further embodiments that a person skilled in the art would obtain without inventive activity fall within the scope of protection of this utility model.

[0030] It should be clarified that the terms used here serve only to describe specific example implementations and are not to be understood as restrictive. Unless the context clearly indicates otherwise, the singular forms "eins" and "ein" used in the text can also include the plural forms. The terms "Umfassen" (to include), "Enthalten" (to contain), and "Aufweisen" (to exhibit) are inclusive and therefore indicate the presence of the mentioned features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0031] Although terms such as "first," "second," etc., may be used in the text to describe multiple elements, parts, regions, layers, and / or sections, these elements, parts, regions, layers, and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or section from another. Unless expressly indicated otherwise in the context, terms such as "first," "second," and other numerical terms in the text do not imply any order or sequence. Furthermore, in the description of this application, the terms "arrange" and "connect" are to be interpreted broadly unless expressly stated otherwise and limited.For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection via an intermediate medium. For general technical personnel in this field, the specific meaning of the above terms in the present application may be understood according to the specific circumstances.

[0032] To facilitate description, terms of spatial relationships can be used in the text to describe the relationship between one element or feature and another, as depicted in the figures. These terms of spatial relationships include, for example, "end," "length," "inside," "outside," etc. These terms of spatial relationships also encompass different orientations of the mechanism in use or operation, in addition to the orientations shown in the figures. For example, if the mechanism in the figures is reversed, the element described as "among other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can encompass both "above" and "below."The mechanism can also be oriented differently (rotated by 90 degrees or in other directions), and the spatial relative terms used in the text should be interpreted accordingly.

[0033] The position detection block is designed, together with the sensor, to determine the position between two parts that move relative to each other, and it generally comprises two parts: a base attached to the component and a sensor element mounted on the base, with the sensor element being fixed to the base by means of screw fasteners. With components such as lifting arms, vibrations during extension and retraction are unavoidable, which can easily cause screw fasteners to loosen and fall off after prolonged use.

[0034] In some related technologies, screws without a countersunk head (e.g., socket head cap screws) are used to fasten the sensor element. This allows for the easy insertion of an elastic washer between the screw head and the sensor element to prevent loosening. In this case, the sensor element does not need to be countersunk and can be cut directly from a thin metal sheet. This connection method not only prevents the screws from loosening but also simplifies the manufacturing process of the position detection block.

[0035] However, at this moment the screw head protrudes, and during the relative movement of the two components, the exposed cables between the parts (such as the length sensor's pull wires, electrical lines, etc.) can get caught on the screw and there is a risk of them being torn off.

[0036] The following is an exemplary embodiment of the present utility model in conjunction with the Fig. 1 to 8 described.

[0037] As in the Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. Figure 5 shows an embodiment of the present utility model in which a position detection block 2 is provided, comprising a base 201 and at least one sensor element 202, wherein the sensor element 202 comprises a sensor body 2021 and a pre-embedded rib 2022, wherein the pre-embedded rib 2022 is arranged on the sensor body 2021 and the pre-embedded rib 2022 is embedded in the base 201.

[0038] As in the Fig. 3, Fig. 4 and Fig. Figure 5 illustrates the use of the position detection block 2 using the example of the lifting arm. The lifting arm comprises several arm segments 1 and a telescopic cylinder 3, wherein the individual arm segments 1 are arranged telescopically within one another and a position detection block 2 is provided on each arm segment 1, and wherein the telescopic cylinder 3 is inserted into the arm segment 1 and is designed to extend or retract the arm segment 1, and the telescopic cylinder 3 is equipped with a sensor element of the sensor 4 for detecting the position detection block 2.

[0039] The individual arm segments 1 are arranged telescopically within one another from the inside out. During operation of the lifting arm, the telescopic cylinder 3 first connects to and locks the innermost arm segment 1, and the arm segment 1 moves along the axis of the lifting arm, thus enabling its extension and retraction. Once the current arm segment 1 has extended to the set length, the telescopic cylinder 3 unlocks from the current arm segment 1, retracts, and connects and locks to other arm segments 1, thereby moving the next arm segment 1 along the axis of the lifting arm. When switching to other arm segments 1, the telescopic cylinder 3 detects the sensor element 202 via the sensor 4, thus determining its relative position to the arm segment 1 and precisely locking the arm segment 1.

[0040] The sensor element 202 has pre-embedded ribs 2022, allowing it to be integrated into the socket 201 via an embedded connection. Firstly, the pre-embedded ribs 2022 are embedded and fixed in the socket 201, creating a tight connection between the sensor element 202 and the socket 201. This improves the seismic performance of the position detection block 2 and reduces the risk of the sensor element 202 falling off during operation. Secondly, the sensor element 202 does not require a screw fastening element, resulting in a flat, protrusion-free surface for the position detection block 2. This reduces the risk of the position detection block 2 becoming entangled in the cable during use, thus preventing the position detection block 2 from easily tearing the cable and improving safety when using the position detection block 2.

[0041] With further reference to Fig. 3, Fig. 4 and Fig. 5 In some embodiments, several position detection blocks 2 can be arranged on an arm segment 1 to check the relative position relationship between the telescopic cylinder 3 and the arm segment 1 and thereby further improve the reliability of the positioning.

[0042] Furthermore, a base 201 can be provided with mounting positions for several sensor elements 202, and by the targeted arrangement of the sensor elements 202 at the mounting positions and the different placement of the sensor elements 202 on each arm segment 1, the arm segment 1 in which the telescopic cylinder 3 is currently located can be determined based on the measurement signal between the sensor 4 and the sensor elements 202. As in Fig. As shown in Figure 5, the outermost arm segment 1 may not have a position detection block 2. Only the arm segment 1 that needs to be connected to and extend or retract from the telescopic cylinder 3 requires a position detection block 2.

[0043] It should be noted that the position detection block 2 of this utility model is in addition to the one described in the Fig. 3, Fig. 4 and Fig. The lifting arm shown in Figure 5 can also be used for other devices where the position of components needs to be determined to prevent the cable from becoming tangled or even breaking. For example, the position detection block 2 can be arranged on the rail to prevent the cable of the pulled detection carriage from getting caught; other possible application scenarios are not discussed in detail here.

[0044] It is understandable that the connection between the pre-embedded rib 2022 and the base 201 can be established in various ways. For example, the openings on the pre-embedded rib 2022 and the base 201 can be manufactured by press fit, so that the pre-embedded rib 2022 can be embedded and fixed in the base 201; alternatively, the pre-embedded rib 2022 can be embedded and fixed in the base 201 by gluing, compression molding, etc., with further possible implementation methods described in the relevant documentation and not discussed in detail here.

[0045] The sensor element 202 can have the form of a plate, a block, or other shapes suitable for detection by the sensor 4. Optionally, the sensor element 202 can also be designed as a plate. Firstly, the plate-shaped sensor element 202 is relatively thin and can be produced by cutting and machining a plate of uniform thickness, which simplifies manufacturing. Secondly, the sensor element 202 has a large surface area facing the sensor 4, making it suitable for detection by the sensor 4.

[0046] In order to improve the connection between the sensor element 202 and the base 201, in some embodiments the outer contour of the pre-embedded rib 2022 has a concave structure, wherein the concave structure is designed to form a positive fit with the base 201.

[0047] During the manufacturing process, part of the base 201 can be inserted into the concave structure, causing the base 201 to interlock with the pre-embedded rib 2022, resulting in a tighter connection between the sensor 202 and the base 201 and thus further reducing the risk of the sensor element 202 falling off during operation.

[0048] For example, the pre-embedded rib can be used in 2022, as in the Fig. 1, Fig. 6 and Fig. Figure 7 shows a boundary section 20221 comprising a boundary section 20221, wherein the outer dimensions of the boundary section 20221 gradually increase in the direction away from the sensor body 2021, and a concave structure is formed between the sensor body 2021 and the boundary section 20221.

[0049] It is understandable that the outer dimensions can be at least one of the length or width dimensions, as long as the boundary section 20221 projects outwards due to a change in the outer dimensions and a concave structure is formed between the sensor body 2021 and the boundary section 20221. For example, in the Fig. 6 and Fig. In the 7 illustrated embodiments, the length L of the boundary section 20221 gradually increases towards the far end of the sensor body 2021, while the width W (or the thickness of the pre-embedded rib 2022) remains unchanged, giving the pre-embedded rib 2022 a more standardized shape that is easier to produce by cutting sheet metal (e.g. laser cutting or punching).

[0050] It should be noted that in the present utility model, a part of the pre-embedded rib 2022 can be used as limiting section 20221, or that the entire pre-embedded rib 2022 can be used as limiting section 20221. For example, in the Fig. In the embodiment shown in Figure 6, the limiting section 20221 is only a part of the pre-embedded rib 2022, and the outer dimensions of the other parts of the pre-embedded rib 2022 can be flexibly designed as required.

[0051] Optionally, in some embodiments, the sensor element 202 can further comprise several pre-embedded ribs 2022, the individual pre-embedded ribs 2022 being arranged at intervals on the sensor body 2021. The arrangement of several pre-embedded ribs 2022 creates multiple connection points between the sensor element 202 and the base 201, which can improve the connection strength between the sensor element 202 and the base 201 and further reduce the risk of the sensor element 202 falling off during operation.

[0052] In some embodiments, the sensor element 202 and the base 201 are formed as a single piece. Firstly, compared to embedded connection methods such as press fit or adhesive bonding, the one-piece design improves the bond strength between the sensor element 202 and the base 201, optimizes the seismic stability of the position detection block 2, and reduces the risk of the sensor element 202 falling off during operation; secondly, the one-piece design eliminates the assembly process of the sensor element 202 and the base 201, thereby increasing the manufacturing efficiency of the position detection block 2.

[0053] It is understandable that the one-piece forming process described in the present utility model is a conventional one-piece forming process in related technologies such as injection molding and additive manufacturing, and that it is not limited to these. In the manufacturing process, the sensor element 202 is first machined and then positioned in a predefined location. A base 201 is formed around the sensor element 202, thus connecting the sensor element 202 and the base 201.

[0054] In some embodiments, the base 201 is made of plastic (e.g., nylon) and the sensor element 202 is made of metal. The base 201 and the sensor element 202 can now be injection-molded together as a single piece. The plastic material used is not very hard and protects the cable from scratches and damage. Furthermore, the plastic material exhibits a certain degree of elasticity, which improves the vibration resistance of the position detection block 2.

[0055] In some embodiments, the pre-embedded rib 2022 further comprises a first connecting bore 20222, wherein the first connecting bore 20222 is designed for positioning the sensor element 202 during the one-piece forming process.

[0056] During the one-piece forming process, the sensor element 202 is first positioned at the intended location, and then a base 201 is formed around the sensor element 202, so that the base 201 and sensor element 202 are firmly connected. The first connecting bore 20222 allows the sensor element 202 to be precisely positioned and fixed, thus ensuring the exact positional relationship between the sensor element 202 and the base 201.

[0057] Using injection molding as an example, it can be shown that first the sensor element 202 must be machined. Then, the sensor element 202 is inserted into the mold, the first connecting bore 20222 is positioned with the connecting pin, and the sensor element 202 is fixed in place. Next, the mold is closed, and plastic is injected, which hardens in the mold cavity and forms a base 201. Finally, the mold is opened, the connecting pin is removed, and the required position detection block 2 is obtained through post-processing. During the curing process, the sensor element 202 can maintain its position stably with the help of the connecting pin, thus preventing positional displacement under the influence of internal stresses and ensuring that the sensor element 202 is in the correct position after molding.

[0058] Furthermore, the pre-embedded rib 2022 can include several first connection holes 20222. For example, several first connection holes 20222 can be open simultaneously on a pre-embedded rib 2022, or one first connection hole 20222 can be open on each of the several pre-embedded ribs 2022, wherein the several first connection holes 20222 form several positioning points that are able to enable more precise positioning and fixing of the sensor element 202.

[0059] In some embodiments, at least some of the first connecting bores 20222 of the pre-embedded ribs 2022 are arranged coaxially to one another. By applying a coaxial placement method, several first connecting bores 20222 can be connected and positioned simultaneously via a single connecting pin during the one-piece forming process, which simplifies positioning and makes the production and manufacturing of the position detection block 2 more efficient.

[0060] In some embodiments, the pre-embedded rib 2022 is welded to the sensor body 2021. The pre-embedded rib 2022 and the sensor body 2021 are manufactured separately and then welded together. The simple shape of the pre-embedded rib 2022 and the sensor body 2021 contributes to reducing machining effort, thereby simplifying the manufacturing process of the sensor element 202 and increasing production efficiency. Besides welding, the pre-embedded rib 2022 and the sensor body 2021 can also be manufactured by bending. In this case, however, the pre-embedded rib 2022 can only be positioned at the edge of the sensor body 2021, which limits the design of the sensor element 202.

[0061] In some embodiments, the base comprises 201, as shown in Fig. 1, Fig. 4 and Fig. Figure 8 shows a recess in which the sensor body 2021 is arranged and the depth of the recess is greater than or equal to the thickness of the sensor body 2021. The sensor body 2021 is concealed in the recess, with the base 201 being used to shield the sharp edges of the sensor body 2021 and thus reduce the risk of the exposed sensor body 2021 scratching and damaging the cable.

[0062] In some embodiments, the base comprises 201, as shown in Fig. 1 and Fig. Figure 2 shows a second connecting bore 2011, wherein the second connecting bore 2011 is designed as a stepped bore and is designed for the installation of countersunk screws to connect the base 201 and the arm segment 1. The base 201 is arranged on the arm segment 1 via the countersunk screws, which can further reduce the protruding section on the surface of the position detection block 2, reduce the risk of the cable becoming entangled on the position detection block 2 during relative movements between the arm segment 1 and the telescopic cylinder 3, and improve the operational reliability of the lifting arm.

[0063] In some embodiments, the base comprises 201, as shown in Fig.Figure 8 shows a guide ramp 2012, wherein the guide ramp 2012 is located at the front of the base 201 and at both ends of the base 201 along the extension direction of the arm segment 1. The guide ramp 2012 is able to guide the cable hanging from the base 201 in such a way that it detaches from the base 201, thereby further reducing the risk of the cable becoming entangled in the position detection block 2.

[0064] According to an embodiment of the present utility model, a lifting arm is provided in a second aspect, comprising several arm segments and a telescopic cylinder 3, wherein the individual arm segments 1 are arranged telescopically within one another and a position detection block 2 provided in the present utility model is provided on the arm segments 1; wherein the telescopic cylinder 3 is inserted into the arm segment 1 and is designed for extending or retracting the arm segment 1, and the telescopic cylinder 3 is provided with a sensor 4 for detecting the position detection block 2.

[0065] The lifting arm includes a position detection block 2 and therefore benefits from the corresponding advantageous effects of the position detection block 2, which are not explained in detail here.

[0066] According to an embodiment of the present utility model, a third aspect includes a working machine comprising a chassis and a lifting arm of the present utility model, wherein the lifting arm is arranged on the chassis; or comprising a position detection block 2 of the present utility model.

[0067] Depending on the chassis, the lifting arm is extended and retracted to perform lifting tasks, and the working machine encompasses the lifting arm and therefore benefits from the corresponding advantageous effects of the lifting arm, which are not explained in detail here.

[0068] It is understandable that the chassis can be mounted on various transport vehicles to facilitate the transport of the machine. For example, the chassis can be attached to a vehicle frame, making the machine a crane truck, or the chassis can be mounted on the deck of a ship, making the machine a crane ship. Naturally, the machines can also be permanently installed; for example, the chassis can be fixed to a dock or another work site. This utility model does not restrict the specific design or application of the machine.

[0069] The machine need not necessarily include a chassis and a lifting arm. As long as it has two components that move relative to each other and cables run between these components, it can include the position detection block 2 of the present utility model and benefit from the corresponding advantageous effects of the position detection block 2, which are not explained in detail here.

[0070] Although the embodiments of the present utility model are described in conjunction with the figures, the person skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope of protection defined by the attached claims.

Claims

[1] Position detection block, characterized by that it includes the following: a base (201); at least one sensor element (202), wherein the sensor element (202) comprises a sensor body (2021) and a pre-embedded rib (2022), wherein the pre-embedded rib (2022) is arranged on the sensor body (2021) and the pre-embedded rib (2022) is embedded in the base (201). [2] Position detection block according to claim 1, characterized by , that the outer contour of the pre-embedded rib (2022) has a concave structure, wherein the concave structure is designed to form a positive fit with the base (201). [3] Position detection block according to claim 1, characterized by , that the sensor element (202) comprises several pre-embedded ribs (2022), wherein the individual pre-embedded ribs (2022) are arranged at intervals on the sensor body (2021). [4] Position detection block according to claim 3, characterized by, that the sensor element (202) and the base (201) are formed in one piece and the pre-embedded rib (2022) further comprises a first connecting bore (20222), wherein the first connecting bore (20222) is designed for positioning the sensor element (202) during the one-piece forming process. [5] Position detection block according to claim 4, characterized by , that at least part of the first connecting bores (20222) of the pre-embedded ribs (2022) are arranged coaxially to each other. [6] Position detection block according to claim 1, characterized by , that the pre-embedded rib (2022) is welded to the sensor body (2021). [7] Position detection block according to claim 1, characterized by that the base (201) comprises a recess, wherein the sensor body (2021) is arranged in the recess and the depth of the recess is greater than or equal to the thickness of the sensor body (2021). [8] Position detection block according to claim 1, characterized by , that the base (201) includes a second connecting bore (2011), wherein the second connecting bore (2011) is designed as a stepped bore and the second connecting bore (2011) is designed for the insertion of countersunk screws for fastening the base (201). [9] Lifting arm, characterized by that it includes the following: several arm segments (1), wherein the individual arm segments (1) are arranged telescopically into one another and a position detection block (2) according to one of claims 1 to 8 is provided on each of the arm segments (1); a telescopic cylinder (3) which is inserted into the arm segment (1) and is designed to extend or retract the arm segment (1), wherein the telescopic cylinder (3) is provided with a sensor element of the sensor (4) for detecting the position detection block (2). [10] Working machine, characterized by that it includes the following: a chassis and a lifting arm according to claim 9, wherein the lifting arm is arranged on the chassis; or comprising a position detection block according to any one of claims 1 to 8.

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