WO2023098133A1

WO2023098133A1 - Weighing sensor with good stability

Info

Publication number: WO2023098133A1
Application number: PCT/CN2022/110731
Authority: WO
Inventors: 张兴; 张班本; 王成; 黄青松; 汪振全
Original assignee: 安徽天平机械股份有限公司
Priority date: 2021-12-02
Filing date: 2022-08-07
Publication date: 2023-06-08
Also published as: CN114199358A

Abstract

A weighing sensor with good stability, the sensor comprising a base (1) and an elastic body (2), wherein a bottom end edge of the elastic body (2) extends outwards to form a first connection portion (21) and a second connection portion (22), with the first connection portion (21) and the second connection portion (22) being respectively located at opposite sides of the elastic body (2), the first connection portion (21) being clamped to the base (1), and the second connection portion (22) being fixedly connected to the base (1) by means of a plurality of bolts (3). Since a bottom end of the elastic body (2) is provided with the first connection portion (21) and the second connection portion (22) which are specially used for being connected to the base (1), the first connection portion and the second connection portion do not need to penetrate the entirety of the elastic body (2), that is, a bolt hole that penetrates the entirety of the elastic body (2) does not need to be provided in same, such that a reduction in the strength of the elastic body (2) due to the provision of the bolt hole is prevented, and the problem of the elastic body (2) splitting at the position of the bolt hole when bearing a relatively large load for a long time is prevented.

Description

A load cell with good stability

technical field

The invention relates to the technical field of weighing sensors, in particular to a weighing sensor with good stability.

Background technique

The existing double-shear beam sensors all use screws to fix the elastic body of the sensor and the base together. This fixing method has the following problems: ①The screw penetrates the elastic body, that is, a through hole needs to be set on the elastic body. In the case of a long-term heavy load of the load cell, the elastic body is easy to break at the through hole; ②The traditional elastic body and Due to the limitation of the connection method and position, the base can only be connected by two screws. The connection is not strong enough and it is easy to loosen. Especially when it is applied to the weighbridge system, it is easier to loosen due to the large load, which affects the weighing accuracy; ③ The existence of the screw rod forms a bondage to the elastic body, which is not conducive to the free deformation and reset of the elastic body. Based on this, how to design a load cell with good stability is the technical problem to be solved by the present invention.

Contents of the invention

The invention aims at the deficiencies of the prior art and provides a load cell with good stability.

The present invention realizes solving above-mentioned technical problem by following technical means:

A load cell with good stability, including a base and an elastic body; the bottom edge of the elastic body extends outward to form a first connection part and a second connection part; the first connection part and the second connection part respectively Located on opposite sides of the elastic body; the first connecting part is engaged with the base; the second connecting part is fixedly connected to the base through a plurality of bolts.

As an improvement of the above technical solution, in the load cell with good stability, the second connecting part and the first connecting part are respectively located at the front and rear sides of the bottom end of the elastic body; the base is provided with a card slot ; The first connecting portion extends into the slot.

As an improvement of the above technical solution, in the load cell with good stability, a plurality of accommodation grooves are arranged at the outer edge of the upper end of the base; a plurality of the bolts are arranged in the accommodation grooves one by one, And one end of the bolt is hinged with the side wall of the receiving groove; a plurality of bolt holes corresponding to the bolts are provided on the second connecting part; the side of the bolt hole is provided with a hole for the bolt to enter from the side Open your mouth.

As an improvement of the above technical solution, in the load cell with good stability, the inner edge of the upper end of the base extends upwards to form an extension, and the cross section of the extension is L-shaped; the circumference between the extension and the base A card slot; the height of the card slot is the same as the thickness of the first connecting part; a locking screw is threaded on the extension part; the locking screw is located directly above the first connecting part; rotate the locking screw , the locking screw moves toward or away from the first connecting part to tighten or release the first connecting part.

As an improvement of the above technical solution, in the load cell with good stability, the width of the bolt hole is the same as the diameter of the bolt.

The advantages of the present invention are: 1. The bottom end of the elastic body is provided with a first connecting portion and a second connecting portion specially used for connecting the base, which does not need to penetrate the entire elastic body, that is, there is no need to provide a bolt hole through the entire elastic body , to avoid the reduction of the strength of the elastic body due to the opening of the bolt hole, and to prevent the elastic body from breaking at the bolt hole under the condition of carrying a large load for a long time; It can be connected by two bolts, the connection is not strong enough, and it is easy to loosen. Especially when it is applied to the weighbridge system, it is easier to loosen due to the large load, which affects the weighing accuracy. The present invention is formed by extending the bottom edge of the elastic body outward. The first connecting part and the second connecting part, under the premise of not affecting the overall strength of the elastic body, more connecting pieces can be used between the elastic body and the base to improve the firmness of the connection between the elastic body and the base, so that it can be Carrying a larger load, avoiding the loosening of the bolt connection during use, and ensuring the stability of use; ③Compared with the traditional through-type bolt connection structure, the connection between the base and the elastic body of the present invention is less restrictive to the elastic body, which is conducive to the freedom of the elastic body Deformation and reset to ensure weighing accuracy.

Furthermore, there is no need to use jacking cylinders to jack up the weighing platform during maintenance. During maintenance, loosen the nut and turn the bolt out of the bolt hole, and then pull out the elastic body horizontally, which is convenient for maintenance and replacement, and does not need to disassemble the base .

Description of drawings

Fig. 1 is a structural schematic diagram of the load cell of the present invention.

Fig. 2 is a schematic diagram of the connection between the elastic body and the base of the present invention.

Fig. 3 is a schematic diagram of the structure of the elastomer of the present invention.

Fig. 4 is a schematic diagram of the bolt hinge of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation

The examples are some, not all, examples of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment 1, referring to the accompanying drawings, a load cell with good stability, including a base 1 and an elastic body 2; the bottom edge of the elastic body 2 extends outward to form a first connecting portion 21 and a second connecting portion 22 The first connecting part 21 and the second connecting part 22 are respectively located on the opposite sides of the elastic body 2; the first connecting part 21 and the base 1 are engaged; The base 1 is fixedly connected;

The bottom edge of the elastic body 2 extends outward to form a first connecting portion 21 and a second connecting portion 22 for connecting the base 1, which changes the traditional way of connecting the elastic body and the base with bolts through, and this change can bring The following effects: ①The bottom end of the elastic body 2 is provided with the first connecting portion 21 and the second connecting portion 22 specially used for connecting the base 1, and there is no need to run through the entire elastic body, that is, there is no need to set a through-hole on the elastic body 2. The bolt hole avoids the reduction of the strength of the elastic body 1 due to the opening of the bolt hole, and prevents the elastic body from breaking at the bolt hole under the condition of carrying a large load for a long time; ②The traditional elastic body 2 and the base 1, due to the connection method and position However, it can only be connected by two bolts, the connection is not strong enough, and it is easy to loosen. Especially when it is applied to the weighbridge system, due to the large load, it is easier to loosen and affect the weighing accuracy. The end edge extends outward to form a first connecting portion 21 and a second connecting portion 22, so that more connecting pieces can be used between the elastic body 2 and the base 1 without affecting the overall strength of the elastic body 2, so as to improve the strength of the elastic body. The connection between 2 and the base 1 is firm, so that it can carry a larger load, avoid the loosening of the bolt connection during use, and ensure the stability of use; ③Compared with the traditional through-type bolt connection structure, the connection between the base 1 and the elastic body 2 of the present invention The method has little constraint on the elastic body, which is helpful for the free deformation and reset of the elastic body 2, and ensures weighing accuracy.

As an improvement of the above technical solution, the second connecting part 22 and the first connecting part 21 are respectively located at the front and rear sides of the bottom end of the elastic body 2; the base 1 is provided with a card slot 11; the first connecting part 21 Extend into the card slot 11;

The front and rear positions of the elastic body 2 are defined relative to the position after installation. After installation, the side facing the installer is the front side, and the side facing away from the installer is the rear side; during installation, since the first connecting part 21 is located at the rear side, if Through the bolt connection, it is inconvenient for the installer to perform the bolt-tightening operation. Therefore, a card slot 11 is extended directly on the rear side of the base 1 to accommodate the first connecting part 21. In order to prevent shaking, the height of the card slot 11 is designed to be the same as the second The first connecting part 21 has the same thickness; when installing, just put the first connecting part 21 into the card slot 11 directly.

As an improvement of the above-mentioned technical solution, a plurality of accommodation grooves 12 are provided at the outer edge of the upper end of the base 1; a plurality of the bolts 3 are arranged in the accommodation grooves 12 in one-to-one correspondence, and one end of the bolt 3 is connected to the accommodation groove 12. The side wall of the slot 12 is hinged; the second connecting portion 22 is provided with a plurality of bolt holes 221 corresponding to the bolts 3 one by one; the side of the bolt hole 221 is provided with an opening for the bolt 3 to enter from the side;

The second connecting part 22 is connected to the base 1 through a plurality of bolts 3. During specific installation, the bolts 3 are initially in a horizontal state, the elastic body 2 is placed on the base 1, and the first connecting part 21 is put into the slot 11 , adjust the position of the elastic body 2 so that the bolt hole 221 is located directly above the bolt 3, then turn the bolt 3 so that the upper end of the bolt 3 enters the bolt hole 221 from the opening of the side wall of the bolt hole 221, and then tighten the nut; This connection method is convenient for the maintenance and replacement of the load cell. Specifically, in the existing weighbridge system, if the sensor is damaged, it is necessary to use the jack cylinder to lift the weighing platform to remove the load cell during repair. This is because the connection The bolts of the elastic body and the base are relatively long, and a certain space is required for pulling them out. However, with the connection method of the present invention, it is not necessary to use a jacking cylinder to lift the weighing platform during maintenance. During maintenance, the bolt 3 is turned out of the bolt after the nut is loosened. hole 221, and then the elastic body 2 can be pulled out horizontally, which is convenient for maintenance and replacement, and does not need to disassemble the base.

As an improvement of the above-mentioned technical solution; the inner edge of the upper end of the base 1 extends upwards to form an extension, and the cross section of the extension is L-shaped; a slot 11 is formed between the extension and the base 1; the slot 11 The height is the same as the thickness of the first connecting part 21; the extension part is threaded with a locking screw 111; the locking screw 111 is located at the top of the first connecting part 21; turning the locking screw 111, the locking screw 111 moves toward or away from the first connecting part 21 to tighten or release the first connecting part 21;

The setting of the locking screw 111 is to tighten the first connecting part 21 after the first connecting part 21 is placed in the card slot 11 to avoid loose connection and ensure the working stability of the load cell; of course, in order to facilitate the operator to twist Locking screw 111; the height of the locking screw 111 is higher than the top of the elastic body 2 and lower than the top of the load cell pressure steel ball.

As an improvement of the above technical solution; the width of the bolt hole 221 is the same as the diameter of the bolt 3;

The width of the bolt hole 221 is designed to be the same as the diameter of the bolt 3, which forms a left and right limit for the bolt 3, reduces the possibility of loosening of the joint of the bolt 3, and improves stability; the inner wall of the bolt hole 221 is not provided with threads.

It should be noted that in this article, if there are relational terms such as first and second, etc., they are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations Any such actual relationship or order exists between. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A load cell with good stability, comprising a base (1) and an elastic body (2); it is characterized in that: the bottom edge of the elastic body (2) extends outwards to form a first connecting part (21) and a second Two connecting parts (22); the first connecting part (21) and the second connecting part (22) are respectively located on opposite sides of the elastic body (2); the first connecting part (21) and the base (1) Clamping: the second connecting part (22) is fixedly connected to the base (1) through a plurality of bolts (3).
A load cell with good stability according to claim 1, characterized in that: the second connecting part (22) and the first connecting part (21) are respectively located at the front and rear sides of the bottom end of the elastic body (2) Position; the base (1) is provided with a card slot (11); the first connecting part (21) extends into the card slot (11).
A load cell with good stability according to claim 1, characterized in that: a plurality of receiving grooves (12) are arranged on the outer edge of the upper end of the base (1); a plurality of the bolts (3) One-to-one correspondence is arranged in the accommodation groove (12), and one end of the bolt (3) is hinged with the side wall of the accommodation groove (12); the second connecting part (22) is provided with a plurality of bolts (3) ) one-to-one corresponding bolt holes (221); the side of the bolt hole (221) is provided with an opening for the bolt (3) to enter from the side.
A load cell with good stability according to claim 2, characterized in that: the inner edge of the upper end of the base (1) extends upwards to form an extension, and the cross section of the extension is L-shaped; the extension and A slot (11) is formed between the bases (1); the height of the slot (11) is the same as the thickness of the first connecting portion (21); a locking screw (111) is threaded on the extension; The locking screw (111) is located directly above the first connecting part (21); when the locking screw (111) is rotated, the locking screw (111) moves toward or away from the first connecting part (21), and the The first connecting part (21) is tightened or released.
A load cell with good stability according to claim 3, characterized in that: the width of the bolt hole (221) is the same as the diameter of the bolt (3).