A double cantilever structure track scale weighing sensor

Abstract

This invention relates to the field of weighing technology, and more particularly to a double-cantilever structure rail scale weighing sensor, comprising a base and a support body disposed thereon, with a data acquisition component mounted on the base. A deformation release groove is laterally formed at the bottom of the base, dividing the base into a base at the bottom and a deformation section above the deformation release groove; an interval groove is formed on the deformation section, dividing the deformation section into a first deformation section and a second deformation section; the base and the support body are separately configured, and force transmission structures for transmitting vertical gravity and isolating horizontal lateral forces are respectively provided between the support body and the first and second deformation sections. This application cuts off the stress transmission path and eliminates mechanical interference through the double-cantilever structure; the separate force transmission structure achieves automatic self-alignment, effectively isolates horizontal lateral torque, improves anti-eccentric load capacity and measurement accuracy, and helps reduce maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of weighing technology, and in particular to a track scale weighing sensor with a double cantilever structure. Background Technology

[0002] A railway scale is a large-scale weighing device used to weigh railway vehicles and goods, widely applied in cargo handover and process control in industries such as metallurgy, coal, power, petrochemicals, and railway logistics. As the core signal acquisition component of a railway scale, the load cell's structural design and measurement stability directly determine the accuracy of the entire weighing system. In traditional railway scale systems, load cells are typically installed under the complex mechanical load-bearing beam, resulting in a cumbersome structure and high maintenance requirements. Currently, sleeper-bridge type railway scale load cells are increasingly widely used. These sensors integrate the functions of the mechanical load-bearing beam and the load cell into one unit. The top of the sensor is directly connected to the railway rail via fasteners and other components, while the bottom is mounted on a pre-embedded steel plate in a concrete foundation. When a train passes, the weight of the wheels acts directly on the sensor through the rail, causing a slight deformation in the elastic body inside the sensor. This deformation is then converted into an electrical signal output by a strain gauge attached to the deformation zone, thus calculating the weight of the vehicle.

[0003] However, as railway freight transport develops towards heavier loads and higher speeds, the stress conditions of trains in the weighing area are becoming increasingly complex. Existing track scale weighing sensors have the following shortcomings in practical applications: Firstly, most existing track scale weighing sensors adopt an integrated single-beam structure, where the top load-bearing body and the lower elastic deformation base are rigidly molded as one piece. This rigid integrated structure has significant drawbacks when dealing with complex working conditions: On the one hand, during train operation, not only is there a downward vertical gravity, but also lateral swaying and side impact forces. When the rail is subjected to horizontal lateral impact, or when the mounting surface is slightly tilted due to foundation settlement, the horizontal lateral torque is directly transmitted to the lower elastic deformation zone through the rigid structure, affecting the accurate acquisition of vertical forces and resulting in significant measurement errors. On the other hand, when the integrated single-beam structure is simultaneously compressed on both sides, the internal stress distribution is complex. There are direct mechanical stress transmission paths between the deformation zones on both sides, which easily leads to stress coupling and mechanical interference, making it difficult to guarantee the independence and accuracy of signal acquisition from each deformation zone.

[0004] Secondly, track scale sensors are typically installed outdoors on railway lines in harsh environments, frequently affected by rain, dust, and gravel. Currently, the lead cables and waterproof connectors of some sensors are often directly exposed to the outside of the substrate, lacking dedicated physical protection. During on-site construction and maintenance, severe vibrations caused by high-speed trains, or the splashing of track ballast, the sensors are easily damaged by mechanical compression or physical impact, leading to water ingress or circuit breaks. This not only affects the continuity of railway metering but also increases the frequency and cost of subsequent sensor repairs. Summary of the Invention

[0005] This application provides a double cantilever structure track scale weighing sensor to solve at least one of the above-mentioned problems in the prior art, and adopts the following technical solution: A double-cantilever rail scale weighing sensor includes a base and a support body disposed thereon. The base is provided with a data acquisition component. A deformation release groove is laterally formed at the bottom of the base, dividing the base into a base at the bottom and a deformation part above the deformation release groove. An interval groove is formed on the deformation part, dividing the deformation part into a first deformation part and a second deformation part. The base and the support body are separately disposed, and a force transmission structure for transmitting vertical gravity and isolating horizontal lateral forces is respectively provided between the support body and the first and second deformation parts.

[0006] Preferably, the force transmission structure includes a force transmission element disposed between the base and the support body, and the first deformation part and the second deformation part are provided with limiting grooves that match the force transmission element.

[0007] Preferably, the bottom of the force transmission element is provided with an arc-shaped or spherical force transmission surface, and the force transmission element is in clearance fit with the limiting groove.

[0008] Preferably, the carrier is further provided with an anti-detachment fastener, which passes through the carrier and the force transmission element in sequence and is connected to the deformation part.

[0009] Preferably, the carrier is supported above the deformable part by the force transmission element, and the force transmission element maintains a clearance distance between the carrier and the deformable part.

[0010] Preferably, the force transmission element and the limiting groove are respectively disposed at one end of the first deformation part and the second deformation part near the spacer groove.

[0011] Preferably, the rear side of the substrate is provided with a plurality of waterproof joints, which are located at both ends of the rear side of the substrate.

[0012] Preferably, protective blocks are provided at both ends of the rear side of the substrate, and a U-shaped groove is provided at the connection between the protective block and the substrate. The waterproof connector is located in the avoidance space formed by the U-shaped groove to form physical protection.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This application achieves the physical isolation function of the left and right stress deformation zones by opening a spacer groove on the deformable part of the substrate to divide it into a first deformation part and a second deformation part. This cuts off the mechanical stress transmission path and avoids stress coupling on both sides, thereby eliminating mechanical interference in the single beam structure and improving the signal independence and measurement accuracy when the pressure of the two wheels is applied simultaneously.

[0014] 2. This application separates the substrate and the load-bearing body, and sets up a force-transmitting element with an arc-shaped or spherical force-transmitting surface and a force-transmitting structure with reserved clearance between the two. This realizes the "automatic self-alignment" and attitude fine-tuning function when the load-bearing body is under force, effectively unloads and isolates horizontal lateral torque, ensures accurate transmission of vertical positive pressure, and improves the sensor's anti-eccentric load capability when dealing with lateral impacts and slight tilting loads of trains.

[0015] 3. This application achieves the physical protection function of enclosing the waterproof joint by setting protective blocks with U-shaped grooves at both ends of the rear side of the substrate, thereby preventing mechanical squeezing and damage to the waterproof joint caused by on-site construction, train vibration or falling rocks, effectively reducing the line failure rate of the sensor and the overall maintenance cost in the later stage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the accompanying drawings are only some embodiments of the present invention. For those skilled in the art, other embodiments and their accompanying drawings can be obtained based on the embodiments shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic diagram of the structure of the substrate of the present invention; Figure 5 This is a rear view of the present invention; Figure 6 This is a schematic diagram of the structure of the carrier of the present invention; Figure 7This is a schematic diagram of the force transmission element of the present invention; Figure 8 This is a cross-sectional view of the present invention.

[0018] Reference numerals: 1. Base; 101. Deformation release groove; 102. Base; 103. Deformation part; 131. Spacing groove; 132. First deformation part; 133. Second deformation part; 2. Bearing body; 201. Anti-detachment fastener; 3. Force transmission element; 4. Limiting groove; 5. Waterproof joint; 6. Protective block; 601. U-shaped groove. Detailed Implementation

[0019] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Currently, most rail scale weighing sensors adopt an integrated single-beam structure, meaning the load-bearing body and the underlying elastic substrate are integrally formed. This rigid integrated connection has obvious drawbacks: First, when the rail is subjected to lateral impact from a train or experiences eccentric loading, the lateral torque is directly and rigidly transmitted to the deformation zone below, resulting in significant measurement errors; second, when the integrated single-beam structure is simultaneously compressed on both sides, the internal stress distribution is complex, and the deformation on both sides is prone to mutual mechanical interference.

[0023] To address the aforementioned technical issues, this embodiment modifies the traditional rigid integral beam into a split double cantilever structure. Specifically, a slot is created in the middle of the base to divide it into independent double cantilever sections, and a force-transmitting structure with spherical or arc-shaped force-transmitting surfaces is introduced between the load-bearing body and the base. This structure severs the stress coupling between the left and right deformation zones, eliminating mechanical interference. Simultaneously, the "self-aligning" effect of the spherical arc surface effectively unloads and isolates horizontal lateral forces, ensuring accurate transmission of vertical gravity and improving the sensor's resistance to off-center loading and the accuracy of long-term measurements. Furthermore, the split design significantly reduces the maintenance costs associated with component replacement.

[0024] An embodiment of the present invention provides a track scale weighing sensor with a double cantilever structure. Example:

[0025] like Figures 1-4 and Figure 8 As shown, a double-cantilever track scale weighing sensor includes a base 1 and a support 2 mounted thereon. The base 1 is equipped with a data acquisition component for acquiring electrical signals generated by deformation under stress. As is a conventional setup in this field, the data acquisition component is typically a strain gauge and a bridge circuit attached to a blind hole in the base deformation; since this is a mature technology in the field, it is not described in detail.

[0026] To improve the measurement accuracy of the sensor, a deformation release groove 101 is laterally formed at the bottom of the base 1. This deformation release groove 101 physically divides the base 1 into a base 102 at the bottom and a deformation part 103 above the deformation release groove 101. The base 102 is used to fix it to the external foundation, while the deformation release groove 101 provides physical clearance space for the elastic downward pressure of the upper square deformation part 103, ensuring that the deformation process is not affected by the flatness of the bottom mounting surface.

[0027] Furthermore, a vertically downward-facing interval groove 131 is formed in the middle of the deformation section 103, dividing the deformation section 103 into an independent first deformation section 132 and a second deformation section 133, thereby forming a double cantilever structure on the substrate 1. This structure cuts off the mechanical stress transmission path between the left and right deformation zones; when one side is subjected to force, it will not cause the cantilever on the other side to deform or be stress-coupled, eliminating mechanical interference and improving the signal independence and measurement accuracy when the pressure of the two wheels is applied simultaneously.

[0028] like Figure 2 and Figure 4As shown, in this invention, the base 1 and the support 2 are arranged separately. To accurately transmit vertical gravity and effectively isolate horizontal lateral forces between the separate structures, a force transmission element 3 is provided between the support 2 and the first deformation part 132 and the second deformation part 133. Specifically, the first deformation part 132 and the second deformation part 133 have limiting grooves 4 matching the force transmission element 3 at their ends near the spacer groove 131. Setting the force point at the cantilever end near the spacer groove 131 maximizes the lever arm length of the cantilever, making the deformation under force more sensitive and linear.

[0029] like Figure 6 and Figure 7 As shown, preferably, the bottom of the force transmission element 3 is provided with an arc-shaped or spherical force transmission surface, and the force transmission element 3 and the limiting groove 4 are fitted with a clearance. In the working state, the load-bearing body 2 is supported above the deformation part 103 by the force transmission element 3, and the height of the force transmission element 3 ensures that there is a clearance between the lower surface of the load-bearing body 2 and the upper surface of the deformation part 103. When a train passes by and generates a horizontal lateral impact force, or when the rail is slightly tilted and unevenly loaded, the arc-shaped or spherical force transmission surface allows the load-bearing body 2 to make slight attitude adjustments within the clearance range. The horizontal lateral torque is unloaded here, ensuring that the force finally transmitted to the lower limiting groove 4 and the cantilever is a vertically downward positive pressure. At the same time, the clearance prevents the load-bearing body 2 from rigidly colliding with the base 1 when slightly deflected, improving the resistance to uneven loading and impact.

[0030] like Figure 6 As shown, considering the safety of the track scale sensor during transportation, hoisting, and long-term vibration environments, the carrier 2 is also equipped with an anti-detachment fastener 201. The anti-detachment fastener 201 passes through the carrier 2 and the force transmission element 3 in sequence, and is connected to the deformation part 103. The anti-detachment fastener 201 mainly serves to limit vertical movement and prevent detachment. It allows for a small amount of movement of the carrier 2 in the horizontal direction or in the assembly gap. Specifically, the mounting hole diameter of the anti-detachment fastener 201 through the carrier 2 and the force transmission element 3 is slightly larger than the rod diameter of the anti-detachment fastener 201, thus reserving a mechanical clearance for fine-tuning the attitude of the carrier 2. This structure ensures the integrity of the split structure without compromising the self-aligning and anti-eccentric load function of the force transmission element 3.

[0031] like Figure 5As shown, the working environment of a track scale is typically harsh. Therefore, several waterproof connectors 5 are provided on the rear side of the base 1 for leading out the cables of the internal data acquisition components. The waterproof connectors 5 are located at both ends of the rear side of the base 1, away from the central stress-deformation core area. To further protect the wiring components, protective blocks 6 are fixed at both ends of the rear side of the base 1, and U-shaped grooves 601 are formed at the connection between the protective blocks 6 and the base 1. The waterproof connectors 5 are located within the clearance space formed by the U-shaped grooves 601. This physical protection structure forms an outer layer of protection, effectively preventing mechanical compression and damage to the waterproof connectors 5 from on-site construction, train vibration, and falling rocks, thus reducing the sensor's line failure rate and subsequent maintenance costs.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects. The scope of the invention is defined by the appended claims, not by the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A track scale weighing sensor with a double cantilever structure, comprising a base (1) and a support (2) disposed thereon, wherein the base (1) is provided with a data acquisition component, characterized in that: The base (1) has a deformation release groove (101) horizontally opened at the bottom. The deformation release groove (101) divides the base (1) into a base (102) at the bottom and a deformation part (103) above the deformation release groove (101). The deformable part (103) is provided with a spacer groove (131), which divides the deformable part (103) into a first deformable part (132) and a second deformable part (133). The base (1) and the support (2) are separate components, and the support (2) and the first deformation part (132) and the second deformation part (133) are respectively provided with force transmission structures for transmitting vertical gravity and isolating horizontal lateral forces.

2. The track scale weighing sensor with a double cantilever structure according to claim 1, characterized in that: The force transmission structure includes a force transmission element (3) disposed between the base (1) and the support (2), and the first deformation part (132) and the second deformation part (133) are provided with limiting grooves (4) that match the force transmission element (3).

3. The track scale weighing sensor with a double cantilever structure according to claim 2, characterized in that: The bottom of the force transmission element (3) is provided with an arc-shaped or spherical force transmission surface, and the force transmission element (3) is in clearance fit with the limiting groove (4).

4. A track scale weighing sensor with a double cantilever structure according to claim 2, characterized in that: The carrier (2) is also provided with an anti-detachment fastener (201), which passes through the carrier (2) and the force transmission element (3) in sequence and is connected to the deformation part (103).

5. A track scale weighing sensor with a double cantilever structure according to claim 2, characterized in that: The support body (2) is supported above the deformable part (103) by the force transmission element (3), and the force transmission element (3) maintains a clearance distance between the support body (2) and the deformable part (103).

6. A track scale weighing sensor with a double cantilever structure according to claim 2, characterized in that: The force transmission element (3) and the limiting groove (4) are respectively located at one end of the first deformation part (132) and the second deformation part (133) near the spacer groove (131).

7. A track scale weighing sensor with a double cantilever structure according to claim 1, characterized in that: The substrate (1) has several waterproof connectors (5) on its rear side, and the waterproof connectors (5) are located at both ends of the rear side of the substrate (1).

8. A track scale weighing sensor with a double cantilever structure according to claim 7, characterized in that: The base (1) is provided with protective blocks (6) at both ends of the rear side. A U-shaped groove (601) is provided at the connection between the protective block (6) and the base (1). The waterproof connector (5) is located in the clearance space formed by the U-shaped groove (601) to form physical protection.

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