Weight detection device

Abstract

The invention 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 invention, the practicability of the weight detection device is improved.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a weight detection device. Background Art

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

[0003] At present, in the existing column weighing sensors, the allowable tilt angle of the pressure head is small. During use, when the tilt of the pressure head exceeds the allowable range, the column weighing sensor will be damaged, thereby affecting the detection effect and having poor practicality. Summary of the Invention

[0004] The main purpose of the present invention is to provide a weight detection device, aiming to improve the practicability of the weight detection device.

[0005] To achieve the above-mentioned object, the weight detection device proposed by the present invention comprises:

[0006] A pressure-bearing component is provided with a receiving groove;

[0007] a weighing detection element, partly disposed in the receiving groove; and

[0008] An avoidance groove is arranged along the circumference of the weighing detection element. The avoidance groove is exposed to the accommodating groove in the radial direction of the weighing detection element to avoid the notch of the accommodating 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, and both the pressure head and the pressure seat are provided with the accommodating groove. The opposite ends of the weighing detection element are respectively arranged in one of the accommodating grooves and are respectively provided with one of the avoidance grooves.

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

[0011] subject; and,

[0012] Two first ring platforms are protrudingly provided on opposite sides of the main body. The two first ring platforms are embedded in the two accommodating grooves in a one-to-one correspondence. The avoidance groove is provided on a side of the first ring platform close to the main body.

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

[0014] A second ring platform is provided on the weighing detection element and is located between the avoidance groove and the main body; and

[0015] A limiting groove is provided on the pressure seat, and the notch of the accommodating 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 limit the rotation of the weighing detection element relative to the pressure seat.

[0016] In one embodiment, the outer periphery of the second ring platform is provided with two opposite first vertical surfaces, and the inner wall of the limiting groove is provided with two opposite second vertical surfaces, and the second vertical surfaces are in one-to-one correspondence and abut against the first vertical surfaces.

[0017] In one embodiment, the contact between the weighing detection element and the accommodating groove is spherical contact.

[0018] In one embodiment, a surface of the weighing detection element that contacts the bottom of the accommodating groove is a spherical surface, and the bottom of the accommodating groove is a plane.

[0019] In one embodiment, the radius of the spherical surface 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] Straight oil cup, the pressure-bearing component is provided with a through hole connected to the accommodating groove, and the straight oil cup is arranged in the through hole.

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

[0023] The polytetrafluoroethylene guide belt is arranged between the side wall of the accommodating groove and the weighing detection element.

[0024] The technical solution of the present invention is to provide a pressure-bearing component, a weighing detection element, and an avoidance groove in a weight detection device, wherein the pressure-bearing component is provided with a receiving groove; the weighing detection element is partially provided in the receiving groove; the avoidance groove is provided along the circumference of the weighing detection element, and the avoidance groove is exposed to the receiving groove in the radial direction of the weighing detection element, so as to avoid the notch of the receiving groove and enable the pressure-bearing component to tilt relative to the weighing detection element. Compared with the prior art, in which the pressure-bearing component directly collides with the weighing detection element when tilted, the technical solution of the present invention is provided with an avoidance groove, which increases the allowable tilt angle of the pressure-bearing component relative to the weighing detection element, avoids the pressure-bearing component colliding with the weighing detection element when tilted, ensures that the weight detection device can function normally, and improves the practicality of the weight detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A schematic structural diagram of an embodiment of a weight detection device provided by the present invention;

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

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

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

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

[0031] Description of Figure Numbers:

[0032] 110, press head; 120, press seat; 121, second vertical surface; 122, limit portion; 130, plane;

[0033] 200, weighing detection element; 210, avoidance groove; 220, first ring platform; 221, spherical surface; 230, second ring platform; 231, first vertical surface; 240, main body;

[0034] 300, polytetrafluoroethylene guide belt;

[0035] 400, straight oil cup;

[0036] 500. Protective cover.

[0037] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

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

[0042] At present, in the existing column weighing sensors, the allowable tilt angle of the pressure head is small. During use, when the tilt of the pressure head exceeds the allowable range, the column weighing sensor will be damaged, thereby affecting the detection effect and having poor practicality.

[0043] The present invention provides a weight detection device to improve the practicability of the weight detection device.

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

[0045] The pressure-bearing assembly is provided with a receiving groove and is configured to contact the mounting base to transmit pressure. The pressure-bearing assembly also provides positioning and support for the weight detection device. In one embodiment, the pressure-bearing assembly is provided with mounting holes to facilitate attachment to the mounting base or connection to an external load. Of course, in other embodiments, the pressure-bearing assembly can also be connected to the mounting base or external load through methods such as snap-fitting or bonding, which are not limiting herein.

[0046] The weighing detection element 200 is partially located in the receiving groove, and the pressure-bearing component can transfer pressure to the weighing detection element 200 so that the weighing detection element 200 can detect the weight normally. In one embodiment, the weighing detection element 200 includes an elastomer and a resistance strain gauge provided on the elastomer. The elastomer is partially located in the receiving groove. The pressure-bearing component can transfer pressure to the elastomer and cause it to deform. The resistance strain gauge can output a corresponding signal according to the deformation of the elastomer to realize weight detection. Of course, in other embodiments, the weighing detection element 200 can also include a piezoelectric ceramic strain gauge and a flexible support member, etc., and no specific limitation is made here.

[0047] The avoidance groove 210 is arranged along the circumference of the weighing detection element 200, and the avoidance groove 210 is exposed to the accommodating groove in the radial direction of the weighing detection element 200, so as to avoid the notch of the accommodating groove so that the pressure-bearing component can tilt relative to the weighing detection element 200. In one embodiment, the avoidance groove 210 is arranged corresponding to the notch of the accommodating groove and is partially exposed to the accommodating groove in the radial direction of the weighing detection element 200. Specifically, in one embodiment, the cross-sectional shape of the avoidance groove 210 is arc-shaped, and the radius of the arc is 5 mm. Of course, in other embodiments, the radius of the arc can also be greater than or equal to 4 mm and less than or equal to 6 mm. The radius of the arc can be flexibly set according to actual needs, and no specific limitation is made here. In this way, by setting the avoidance 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, it can avoid the allowable tilt angle being too small, which may cause 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 may cause the weight detection device to fall over when the pressure-bearing component is tilted relative to the weighing detection element 200, thereby ensuring the normal use of the weight detection device.

[0048] The technical solution of the present invention is to provide a pressure-bearing assembly, a weighing detection element 200, and an avoidance groove 210 in a weight detection device, wherein the pressure-bearing assembly is provided with a receiving groove; the weighing detection element 200 is partially provided in the receiving groove; the avoidance groove 210 is provided along the circumference of the weighing detection element 200, and the avoidance groove 210 is exposed from the receiving groove in the radial direction of the weighing detection element 200, so as to avoid the notch of the receiving groove and enable the pressure-bearing assembly to tilt relative to the weighing detection element 200. Compared with the prior art, in which the pressure-bearing assembly directly collides with the weighing detection element 200 when tilted, the technical solution of the present invention is provided with the avoidance groove 210, which increases the allowable tilt angle of the pressure-bearing assembly relative to the weighing detection element 200, avoids collision between the pressure-bearing assembly and the weighing detection element 200 when tilted, ensures that the weight detection device can function normally, and improves the practicality of the weight detection device.

[0049] See also Figure 2In one embodiment, the pressure-bearing assembly includes a pressure head 110 and a pressure seat 120. Both the pressure head 110 and the pressure seat 120 are provided with a receiving groove. The opposite ends of the weighing detection element 200 are respectively provided in a receiving groove and respectively provided with an avoidance groove 210.

[0050] In one embodiment, the pressure head 110 and the pressure seat 120 are relatively arranged at the two ends of the weighing detection element 200, the pressure head 110 is used to bear the external load, and the pressure seat 120 is used to contact the installation base. The avoidance groove 210 is arranged in a one-to-one correspondence with the notch of the receiving groove, so that the pressure head 110 and the pressure seat 120 can be tilted at a certain angle relative to the weighing detection element 200. Furthermore, in one embodiment, the elastic body of the weighing detection element 200 includes a main body 240 and two first ring platforms 220, the first ring platforms 220 are protruding on the opposite sides of the main body 240, the two first ring platforms 220 are embedded in the two receiving grooves in a one-to-one correspondence, and the avoidance groove 210 is provided on the side of the first ring platform 220 close to the main body 240. Specifically, in one embodiment, the two first ring platforms 220 are respectively formed with a avoidance groove 210 along the circumferential recess on the side close to the main body 240. In one embodiment, the first annular platform 220 is cylindrical, the avoidance groove 210 is correspondingly an annular groove, and the cross-sectional shape of the accommodating groove is correspondingly circular to ensure structural stability and, thereby, ensure uniform force on the weighing detection element 200. Of course, in other embodiments, the pressure-bearing assembly may also include only the pressure head 110 or the pressure seat 120, with the weighing detection element 200 correspondingly having one avoidance groove 210. Here, there is no limit on the number of avoidance grooves 210.

[0051] The technical solution of the embodiment of the present invention, by providing avoidance grooves 210 at opposite 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, thereby preventing damage caused by tilting the pressure head 110 or the pressure seat 120, further improving the service life and practicality of the weight detection device. The provision of the first ring platform 220 provides a reliable force point, ensuring 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] See also Figure 1 and Figure 2 In one embodiment, the weighing detection element 200 further includes an anti-rotation structure comprising a second annular platform 230 and a limiting groove. The second annular platform 230 is disposed on the weighing detection element 200 and is located between the avoidance groove 210 and the main body 240. The limiting groove is disposed on the pressure seat 120, with the notch of the receiving groove located at the bottom of the limiting groove. The inner wall of the limiting groove abuts 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 side of the receiving groove close to 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 ring platform 230 is configured as a cylinder, and the radius of the second ring platform 230 is larger than the radius of the first ring platform 220, so as to facilitate contact with the inner wall of the limiting groove. Figure 3 and Figure 4 In one embodiment, the outer circumference of the second annular platform 230 is provided with two opposing first vertical surfaces 231, and the inner wall of the retaining 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 one embodiment, the retaining groove comprises only two opposing inner walls, each of which is provided with a second vertical surface 121, with a gap formed between the two inner walls. The second annular platform 230 comprises two first curved surfaces, which are oppositely disposed 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 retaining groove may be provided with a second curved surface abutting against the first curved surface. The anti-rotation structure is not limited here. In one embodiment, both the first vertical surfaces 231 and the second vertical surfaces 121 are formed by milling the second annular platform 230 and the pressure seat 120, with the pressure seat 120 being flattened on one side to improve machining accuracy. Of course, in other embodiments, the first vertical surface 231 and the second vertical surface 121 may also be formed by laser or grinding, etc., which is not limited here.

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

[0055] See also Figure 2 and Figure 4 In one embodiment, the contact between the weighing detection element 200 and the receiving groove is spherical contact.

[0056] In one embodiment, the side 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 bottoms of the receiving grooves of the pressure head 110 and the pressure seat 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 taking into account high precision. The specific radius of the spherical surface 221 can be flexibly set according to actual needs and is not specifically limited here.

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

[0058] See also Figure 1 and Figure 5 In one embodiment, the weight detection device further includes a straight oil cup 400, the pressure-bearing component is provided with a through hole connected to the accommodating groove, and the straight oil cup 400 is provided in the through hole.

[0059] The straight oil cup 400 is used to store and add lubricating oil. In one embodiment, one end of the straight oil cup 400 extends into the receiving groove through a through hole, and the other end of the straight oil cup 400 is exposed at the through hole, so that the lubricating oil can be injected into the straight oil cup 400 through an external oil gun, and then the lubricating oil can be injected into the receiving groove. In one embodiment, the pressure head 110 and the pressure seat 120 are both provided with a through hole, which passes through the side wall of the receiving groove and is arranged near the bottom of the receiving groove to ensure that the oil outlet of the straight oil cup 400 corresponds to the portion where the spherical surface 221 contacts the plane 130. In one embodiment, the through hole is set as 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, and this is not limited here.

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

[0061] See also Figure 4 and Figure 5 In one embodiment, the weight detection device further includes a polytetrafluoroethylene guide belt 300 , which is disposed between the side wall of the accommodating tank and the weighing detection element 200 .

[0062] The polytetrafluoroethylene guide belt 300 has an extremely low coefficient of friction and chemical stability, and can function normally in harsh environments. In one embodiment, the polytetrafluoroethylene guide belt 300 surrounds the outer circumference of the first ring platform 220, one side of the polytetrafluoroethylene guide belt 300 abuts against the first ring platform 220, and the other end of the polytetrafluoroethylene guide belt 300 abuts 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 polytetrafluoroethylene guide belt 300 from approaching the bottom of the receiving groove and blocking the through hole. Of course, in other embodiments, a polyetheretherketone guide belt or a fluorocarbon alloy guide belt 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 limited here.

[0063] The technical solution of the embodiment of the present invention avoids direct contact between the side wall of the accommodating groove and the weighing detection element 200 by providing a polytetrafluoroethylene guide belt 300, thereby avoiding friction between the two and effectively improving the service life of the weighing detection element 200.

[0064] See also Figure 5 In one embodiment, the weight detection device further includes a protective cover 500, which is sleeved on the periphery of the weighing detection element 200 and the pressure seat 120 to cover the connection between the two. Specifically, in one embodiment, the protective cover 500 can be set as 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 can also be set as a plastic protective cover 500 or a metal protective cover 500, etc., and no specific restrictions are made here. Of course, in other embodiments, a protective structure can also be provided at the connection between the weighing detection element 200 and the pressure head 110, and no restrictions are 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 invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A weight detection device, characterized in that: include: A pressure-bearing component is provided with a receiving groove; a weighing detection element, partly disposed in the receiving groove; as well as, An avoidance groove is arranged along the circumference of the weighing detection element. The avoidance groove is exposed to the accommodating groove in the radial direction of the weighing detection element to avoid the notch of the accommodating groove so that the pressure-bearing component can tilt relative to the weighing detection element.

2. The weight detection device according to claim 1, wherein: The pressure-bearing component includes a pressure head and a pressure seat, and both the pressure head and the pressure seat are provided with the accommodating groove. The opposite ends of the weighing detection element are respectively arranged in one of the accommodating grooves and are respectively provided with one of the avoidance grooves.

3. The weight detection device according to claim 2, wherein: The weighing detection element comprises: subject; and, Two first ring platforms are protrudingly provided on opposite sides of the main body. The two first ring platforms are embedded in the two accommodating grooves in a one-to-one correspondence. The avoidance groove is provided on a side of the first ring platform close to the main body.

4. The weight detection device according to claim 3, wherein: The weighing detection element further includes an anti-rotation structure, which includes: A second ring platform is provided on the weighing detection element and is located between the avoidance groove and the main body; and A limiting groove is provided on the pressure seat, and the notch of the accommodating 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 limit the rotation of the weighing detection element relative to the pressure seat.

5. The weight detection device according to claim 4, characterized in that: The outer periphery of the second ring platform is provided with two opposite first vertical surfaces, and the inner wall of the limiting groove is provided with two opposite second vertical surfaces, and the second vertical surfaces are in one-to-one correspondence and abut against the first vertical surfaces.

6. The weight detection device according to claim 1, wherein: The contact mode between the weighing detection element and the accommodating groove is spherical contact.

7. The weight detection device according to claim 6, wherein: The surface of the weighing detection element that contacts the bottom of the accommodating groove is a spherical surface, and the bottom of the accommodating groove is a plane.

8. The weight detection device according to claim 7, wherein: The radius of the spherical surface is greater than or equal to 160 mm and less than or equal to 180 mm.

9. The weight detection device according to claim 1, wherein: The weight detection device also includes: Straight oil cup, the pressure-bearing component is provided with a through hole connected to the accommodating groove, and the straight oil cup is arranged in the through hole.

10. The weight detection device according to claim 1, wherein: The weight detection device also includes: The polytetrafluoroethylene guide belt is arranged between the side wall of the accommodating groove and the weighing detection element.

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