Weight detection device

Abstract

The utility model discloses a weight detection device, and relates to the technical field of detection. The weight detection device comprises a pressure-bearing assembly, a weighing detection element and an avoiding groove, and the pressure-bearing assembly is provided with a containing groove; the weighing detection element is partially arranged in the accommodating groove; the avoiding groove is arranged in the circumferential direction of the weighing detection element, and the avoiding groove is exposed out of the containing groove in the radial direction of the weighing detection element so as to avoid a groove opening of the containing groove, so that the pressure bearing assembly can incline relative to the weighing detection element. According to the technical scheme provided by the utility model, the practicability of the weight detection device is improved.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to a weight detection device. Background Technology

[0002] Taking column-type load cells as an example, they are currently widely used in various electronic truck scales and rail scales, significantly improving the accuracy and reliability of cargo weighing. However, in actual use, these column-type load cells have also revealed some problems.

[0003] Currently, the allowable tilt angle of the indenter in existing column-type load cells is small. During use, when the indenter tilts beyond the allowable range, the column-type load cell will be damaged, thus affecting the detection effect and making it less practical. Utility Model Content

[0004] The main purpose of this invention is to provide a weight detection device that improves the practicality of weight detection devices.

[0005] To achieve the above objectives, the weight detection device proposed in this utility model includes:

[0006] Pressure-bearing components are equipped with receiving grooves;

[0007] The weighing detection element is partially disposed in the receiving groove; and,

[0008] An avoidance groove is provided along the circumference of the weighing detection element, and the avoidance groove is exposed in the radial direction of the weighing detection element from the receiving groove, so as to avoid the opening of the receiving groove so that the pressure-bearing component can tilt relative to the weighing detection element.

[0009] In one embodiment, the pressure-bearing assembly includes a pressure head and a pressure seat, both of which are provided with the receiving groove. The opposite ends of the weighing detection element are respectively provided in one of the receiving grooves and are respectively provided with the avoidance groove.

[0010] In one embodiment, the weighing detection element includes:

[0011] Subject; and,

[0012] Two first ring platforms protrude from opposite sides of the main body, and the two first ring platforms are embedded in the two receiving grooves in a one-to-one correspondence. The avoidance groove is provided on the side of the first ring platform closer to the main body.

[0013] In one embodiment, the weighing detection element further includes an anti-rotation structure, the anti-rotation structure comprising:

[0014] The second ring platform is disposed within the weighing detection element and located between the clearance groove and the main body; and,

[0015] A limiting groove is provided on the pressure seat, and the opening of the receiving groove is located at the bottom of the limiting groove. The inner wall of the limiting groove abuts against the outer periphery of the second ring platform to restrict the rotation of the weighing detection element relative to the pressure seat.

[0016] In one embodiment, the outer periphery of the second annular platform is provided with two opposing first vertical surfaces, and the inner wall of the limiting groove is provided with two opposing second vertical surfaces, the second vertical surfaces and the first vertical surfaces corresponding to each other and abutting against each other.

[0017] In one embodiment, the weighing detection element contacts the receiving groove via spherical contact.

[0018] In one embodiment, the side of the weighing detection element that contacts the bottom of the receiving tank is a spherical surface, and the bottom of the receiving tank is a flat surface.

[0019] In one embodiment, the radius of the sphere is greater than or equal to 160 mm and less than or equal to 180 mm.

[0020] In one embodiment, the weight detection device further includes:

[0021] The straight oil cup is provided in the pressure-bearing component, which has a through hole that communicates with the receiving groove.

[0022] In one embodiment, the weight detection device further includes:

[0023] A polytetrafluoroethylene guide strip is disposed between the side wall of the receiving tank and the weighing detection element.

[0024] The technical solution of this utility model involves setting a pressure-bearing component, a weighing detection element, and a clearance groove in a weight detection device. The pressure-bearing component has a receiving groove; the weighing detection element is partially located in the receiving groove; the clearance groove is arranged circumferentially along the weighing detection element and protrudes radially from the receiving groove, thus avoiding the opening of the receiving groove and allowing the pressure-bearing component to tilt relative to the weighing detection element. Compared to the prior art, where the pressure-bearing component directly collides with the weighing detection element when tilted, the technical solution of this utility model, with its clearance groove, increases the allowable tilt angle of the pressure-bearing component relative to the weighing detection element, preventing collisions and ensuring the normal operation of the weight detection device, thereby improving its practicality. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of an embodiment of the weight detection device provided by this utility model;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure of an embodiment of a weighing detection element;

[0028] Figure 3 for Figure 2 A schematic diagram of the structure of an embodiment from another perspective;

[0029] Figure 4 for Figure 1 A cross-sectional view of an embodiment of the intermediate pressure seat;

[0030] Figure 5 A cross-sectional view of another embodiment of the weight detection device provided by this utility model.

[0031] Explanation of icon numbers:

[0032] 110. Press head; 120. Press seat; 121. Second vertical surface; 122. Limiting part; 130. Plane;

[0033] 200 Weighing detection element; 210 Clearance groove; 220 First ring stage; 221 Spherical surface; 230 Second ring stage; 231 First vertical surface; 240 Main body;

[0034] 300. Polytetrafluoroethylene (PTFE) guide strip;

[0035] 400, straight oil cup;

[0036] 500, protective cover.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] Taking column-type load cells as an example, they are currently widely used in various electronic truck scales and rail scales, significantly improving the accuracy and reliability of cargo weighing. However, in actual use, these column-type load cells have also revealed some problems.

[0042] Currently, the allowable tilt angle of the indenter in existing column-type load cells is small. During use, when the indenter tilts beyond the allowable range, the column-type load cell will be damaged, thus affecting the detection effect and making it less practical.

[0043] This invention proposes a weight detection device to improve the practicality of weight detection devices.

[0044] Please see 1 and Figure 2 In one embodiment, the weight detection device includes a pressure-bearing component, a weighing detection element 200, and a clearance groove 210.

[0045] The pressure-bearing component has a receiving groove and is used to contact the mounting base to transmit pressure. The pressure-bearing component also provides positioning and support for the weight detection device. In one embodiment, the pressure-bearing component has mounting holes for fixing to the mounting base or connecting to an external load. Of course, in other embodiments, the pressure-bearing component can also be connected to the mounting base or external load by snap-fit ​​or adhesive methods; this is not a limitation.

[0046] The weighing detection element 200 is partially disposed in the receiving groove. The pressure-bearing component can transmit pressure to the weighing detection element 200 so that the weighing detection element 200 can detect weight normally. In one embodiment, the weighing detection element 200 includes an elastic body and a resistance strain gauge disposed in the elastic body. The elastic body is partially disposed in the receiving groove. The pressure-bearing component can transmit pressure to the elastic body and cause it to deform. The resistance strain gauge can output a corresponding signal according to the deformation of the elastic body to realize weight detection. Of course, in other embodiments, the weighing detection element 200 may also include a piezoelectric ceramic strain gauge and a flexible support, etc., without specific limitations.

[0047] The clearance groove 210 is arranged circumferentially along the weighing detection element 200, and the clearance groove 210 is exposed radially out of the receiving groove of the weighing detection element 200, so as to avoid the opening of the receiving groove and allow the pressure-bearing component to tilt relative to the weighing detection element 200. In one embodiment, the clearance groove 210 is arranged corresponding to the opening of the receiving groove and is partially exposed radially out of the receiving groove of the weighing detection element 200. Specifically, in one embodiment, the cross-sectional shape of the clearance groove 210 is arc-shaped, and the radius of the arc is 5mm. Of course, in other embodiments, the radius of the arc can be greater than or equal to 4mm and less than or equal to 6mm. The radius of the arc can be flexibly set according to actual needs, and no specific limitation is made here. Thus, by setting the clearance groove 210, the allowable tilt angle of the pressure-bearing component relative to the weighing detection element 200 can reach about 5°. On the one hand, this can avoid the allowable tilt angle being too small, which would make it easy for the pressure-bearing component to collide with the weighing detection element 200 when it is tilted relative to the weighing detection element 200; on the other hand, it can avoid the allowable tilt angle being too large, which would make it easy for the weight detection device to tip over when the pressure-bearing component is tilted relative to the weighing detection element 200, thus ensuring the normal use of the weight detection device.

[0048] The technical solution of this utility model involves setting a pressure-bearing component, a weighing detection element 200, and a clearance groove 210 in a weight detection device. The pressure-bearing component has a receiving groove; the weighing detection element 200 is partially located in the receiving groove; the clearance groove 210 is arranged circumferentially around the weighing detection element 200, and the clearance groove 210 is exposed radially out of the receiving groove to avoid the opening of the receiving groove, allowing the pressure-bearing component to tilt relative to the weighing detection element 200. Compared to the prior art, where the pressure-bearing component directly collides with the weighing detection element 200 when tilted, the technical solution of this utility model, with the clearance groove 210, increases the allowable tilt angle of the pressure-bearing component relative to the weighing detection element 200, avoiding collision between the pressure-bearing component and the weighing detection element 200 when tilted, ensuring the normal functioning of the weight detection device, and improving the practicality of the weight detection device.

[0049] Please see Figure 2 In one embodiment, the pressure-bearing assembly includes a pressure head 110 and a pressure base 120. Both the pressure head 110 and the pressure base 120 are provided with receiving grooves. The opposite ends of the weighing detection element 200 are respectively provided in a receiving groove and are respectively provided with a clearance groove 210.

[0050] In one embodiment, the pressure head 110 and the pressure seat 120 are disposed opposite each other at both ends of the weighing detection element 200. The pressure head 110 is used to bear external loads, and the pressure seat 120 is used to contact the mounting base. The clearance groove 210 is provided one-to-one with the opening of the receiving groove, so that both the pressure head 110 and the pressure seat 120 can be tilted at a certain angle relative to the weighing detection element 200. Further, in one embodiment, the elastic body of the weighing detection element 200 includes a main body 240 and two first annular platforms 220. The first annular platforms 220 protrude from opposite sides of the main body 240, and the two first annular platforms 220 are embedded one-to-one into the two receiving grooves. The clearance groove 210 is provided on the side of the first annular platform 220 near the main body 240. Specifically, in one embodiment, each of the two first annular platforms 220 has a clearance groove 210 recessed circumferentially on the side near the main body 240. In one embodiment, the first annular platform 220 is cylindrical, the clearance groove 210 is an annular groove, and the cross-sectional shape of the receiving groove is circular to ensure the stability of the structure and thus ensure that the weighing detection element 200 is uniformly stressed. Of course, in other embodiments, the pressure-bearing assembly may only include the pressure head 110 or the pressure seat 120, and the weighing detection element 200 is provided with a clearance groove 210. Here, the number of clearance grooves 210 is not limited.

[0051] The technical solution of this utility model embodiment, by providing clearance grooves 210 at both ends of the weighing detection element 200, simultaneously increases the allowable tilt angle of the pressure seat 120 and the pressure head 110 relative to the weighing detection element 200, avoiding damage caused by tilting of the pressure head 110 or the pressure seat 120, and further improving the service life and practicality of the weight detection device. By providing the first ring platform 220, a reliable force-bearing point can be provided to ensure stable contact between the pressure-bearing component and the weighing detection element 200, ensuring uniform force transmission and improving the reliability and stability of the weight detection device.

[0052] Please see Figure 1 and Figure 2 In one embodiment, the weighing detection element 200 further includes an anti-rotation structure, which includes a second annular platform 230 and a limiting groove. The second annular platform 230 is disposed on the weighing detection element 200 and located between the clearance groove 210 and the main body 240; the limiting groove is disposed on the pressure seat 120, and the opening of the receiving groove is located at the bottom of the limiting groove. The inner wall of the limiting groove abuts against the outer periphery of the second annular platform 230 to limit the rotation of the weighing detection element 200 relative to the pressure seat 120.

[0053] In one embodiment, the limiting groove protrudes from the receiving groove on the side near the main body 240, and the inner wall of the limiting groove is located between the inner wall of the receiving groove and the outer periphery of the pressure seat 120. In one embodiment, the second annular platform 230 is configured as a cylinder, and the radius of the second annular platform 230 is larger than the radius of the first annular platform 220, so as to abut against the inner wall of the limiting groove. Please refer to [link to relevant documentation]. Figure 3 and Figure 4 In one embodiment, the outer periphery of the second annular platform 230 is provided with two opposing first vertical surfaces 231, and the inner wall of the limiting groove is provided with two opposing second vertical surfaces 121, which abut against the first vertical surfaces 231 in a one-to-one correspondence. In another embodiment, the limiting groove includes only two opposing inner walls, each of which is provided with a second vertical surface 121, and a gap is formed between the two inner walls. The second annular platform 230 includes two first arc surfaces, which are disposed opposite to each other between the two first vertical surfaces 231 and correspond to the gap. Of course, in other embodiments, the second annular platform 230 may also be provided with a third vertical surface corresponding to the gap, or the inner wall of the limiting groove may be provided with a second arc surface that abuts against the first arc surface. Here, the anti-rotation structure is not limited. In one embodiment, the first vertical surface 231 and the second vertical surface 121 are both formed by milling the second annular platform 230 and the pressure seat 120, and the pressure seat 120 is milled on one side to improve the machining accuracy. Of course, in other embodiments, the first vertical surface 231 and the second vertical surface 121 can also be formed by laser or grinding processes, which are not limited here.

[0054] The technical solution of this utility model embodiment, by setting an anti-rotation structure, avoids the weighing detection element 200 from rotating relative to the pressure base 120 during use, improves the contact stability between the weighing detection element 200 and the pressure base 120, thereby ensuring detection accuracy and improving the reliability and practicality of the weight detection device.

[0055] Please see Figure 2 and Figure 4 In one embodiment, the weighing detection element 200 contacts the receiving groove in a spherical contact manner.

[0056] In one embodiment, the surface of the weighing detection element 200 that contacts the bottom of the receiving groove is a spherical surface 221, and the bottom of the receiving groove is a flat surface 130. Specifically, in one embodiment, the side of the first ring platform 220 facing away from the main body 240 is a spherical surface 221, and the bottom of the receiving grooves of the pressure head 110 and the pressure base 120 are both flat surfaces 130. In one embodiment, the radius of the spherical surface 221 is greater than or equal to 160 mm and less than or equal to 180 mm, which can ensure good sensitivity while maintaining high accuracy. The specific radius of the spherical surface 221 can be flexibly set according to actual needs, and no specific limitation is made here.

[0057] The technical solution of this utility model embodiment provides better adaptability by setting the contact method between the weighing detection element 200 and the pressure head 110 and the pressure base 120 to spherical contact, which can evenly distribute the load, avoid local excessive stress, and improve the detection accuracy of the weight detection device.

[0058] Please see Figure 1 and Figure 5 In one embodiment, the weight detection device further includes a straight oil cup 400, and the pressure-bearing component is provided with a through hole communicating with the receiving groove, and the straight oil cup 400 is disposed in the through hole.

[0059] The straight oil cup 400 is used for storing and filling lubricating oil. In one embodiment, one end of the straight oil cup 400 extends into the receiving groove through a through hole, while the other end of the straight oil cup 400 protrudes from the through hole, so that lubricating oil can be injected into the straight oil cup 400 through an external oil gun, thereby injecting the lubricating oil into the receiving groove. In one embodiment, both the pressure head 110 and the pressure base 120 are provided with through holes, which penetrate the side wall of the receiving groove and are located near the bottom of the receiving groove, so as to ensure that the oil outlet of the straight oil cup 400 corresponds to the part where the spherical surface 221 contacts the plane 130. In one embodiment, the through hole is a threaded hole, and the straight oil cup 400 is threadedly connected to the threaded hole. Of course, in other embodiments, the straight oil cup 400 can also be directly embedded in the through hole, which is not limited here.

[0060] The technical solution of this utility model embodiment, by setting a straight oil cup 400, can realize the self-lubricating function of the weight detection device, so as to reduce the friction between the weighing detection element 200 and the pressure head 110 and pressure seat 120, avoid wear, and improve the service life of the weight detection device.

[0061] Please see Figure 4 and Figure 5 In one embodiment, the weight detection device further includes a polytetrafluoroethylene guide belt 300 disposed between the side wall of the receiving groove and the weighing detection element 200.

[0062] The PTFE guide strip 300 has an extremely low coefficient of friction and chemical stability, enabling it to function normally in harsh environments. In one embodiment, the PTFE guide strip 300 surrounds the outer periphery of the first annular platform 220, with one side of the PTFE guide strip 300 abutting against the first annular platform 220 and the other end abutting against the side wall of the receiving groove. In one embodiment, the side wall of the receiving groove is also provided with a limiting portion 122 to prevent the PTFE guide strip 300 from approaching the bottom of the receiving groove and obstructing the through hole. Of course, in other embodiments, a polyetheretherketone (PEEK) guide strip or a fluorocarbon alloy guide strip, etc., can also be provided between the side wall of the receiving groove and the weighing detection element 200 to reduce the friction between the side wall of the receiving groove and the weighing detection element 200; this is not a limitation.

[0063] The technical solution of this utility model embodiment avoids direct contact between the side wall of the receiving tank and the weighing detection element 200 by setting the polytetrafluoroethylene guide belt 300, thereby avoiding friction between the two and effectively improving the service life of the weighing detection element 200.

[0064] Please see Figure 5 In one embodiment, the weight detection device further includes a protective cover 500, which is sleeved around the outer periphery of the weighing detection element 200 and the pressure seat 120 to cover the connection between them. Specifically, in one embodiment, the protective cover 500 may be an elastic sleeve to avoid collision with the weighing detection element 200 and the pressure seat 120. Of course, in other embodiments, the protective cover 500 may also be a plastic protective cover 500 or a metal protective cover 500, etc., and no specific limitation is made here. Of course, in other embodiments, a protective structure may also be provided at the connection between the weighing detection element 200 and the pressure head 110, and no limitation is made here. In this way, by providing the protective cover 500, the contact part between the weighing detection element 200 and the pressure seat 120 can be prevented from being contaminated and damaged by the outside world, thereby improving the service life of the weight detection device.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A weight detecting device characterized by comprising: include: Pressure-bearing components are equipped with receiving grooves; The weighing detection element is partially disposed in the receiving groove; as well as, An avoidance groove is provided along the circumference of the weighing detection element, and the avoidance groove is exposed in the radial direction of the weighing detection element from the receiving groove, so as to avoid the opening of the receiving groove so that the pressure-bearing component can tilt relative to the weighing detection element.

2. The weight detecting device according to claim 1, wherein The pressure-bearing assembly includes a pressure head and a pressure base. Both the pressure head and the pressure base are provided with the receiving groove. The opposite ends of the weighing detection element are respectively provided in one of the receiving grooves and each is provided with a clearance groove.

3. The weight detecting apparatus according to claim 2, wherein The weighing detection element includes: Subject; and, Two first ring platforms protrude from opposite sides of the main body, and the two first ring platforms are embedded in the two receiving grooves in a one-to-one correspondence. The avoidance groove is provided on the side of the first ring platform closer to the main body.

4. The weight detecting apparatus according to claim 3, wherein The weighing detection element further includes an anti-rotation structure, which comprises: The second ring platform is disposed within the weighing detection element and located between the clearance groove and the main body; and, A limiting groove is provided on the pressure seat, and the opening of the receiving groove is located at the bottom of the limiting groove. The inner wall of the limiting groove abuts against the outer periphery of the second ring platform to restrict the rotation of the weighing detection element relative to the pressure seat.

5. The weight detecting apparatus according to claim 4, wherein The outer periphery of the second ring platform is provided with two opposing first vertical surfaces, and the inner wall of the limiting groove is provided with two opposing second vertical surfaces, with the second vertical surfaces corresponding to and abutting against the first vertical surfaces one by one.

6. The weight detecting apparatus according to claim 1, wherein The weighing detection element contacts the receiving tank via a spherical contact.

7. The weight detecting apparatus according to claim 6, wherein The side of the weighing detection element that contacts the bottom of the receiving tank is a spherical surface, and the bottom of the receiving tank is a flat surface.

8. The weight detecting apparatus according to claim 7, wherein The radius of the sphere is greater than or equal to 160 mm and less than or equal to 180 mm.

9. The weight detecting apparatus according to claim 1, wherein The weight detection device further includes: The straight oil cup is provided in the pressure-bearing component, which has a through hole that communicates with the receiving groove.

10. The weight detecting apparatus according to claim 1, wherein The weight detection device further includes: A polytetrafluoroethylene guide strip is disposed between the side wall of the receiving tank and the weighing detection element.

Images