Bridge type elastomer

Abstract

The utility model discloses a bridge type elastic body, which relates to the elastic body technology, and is characterized by comprising an elastic body, a circular groove is arranged on the elastic body, a through hole is arranged on the top surface of the elastic body, and a stretching groove is arranged on the elastic body. According to the utility model, when the sensing element breaks down, a maintainer can dismount the sealing cover by means of tools such as a crowbar, the end part of the crowbar is inserted into the extending groove and is positioned below the sealing cover, so that the crowbar is propped against the side wall of the extending groove, and then pressure is applied to the crowbar; through the lever principle, the crowbar applies a force of moving back to the elastic body to the edge, above the extending groove, of the sealing cover, so that the sealing cover can be conveniently disassembled, and an operator can conveniently replace a faulted sensing element.

Description

Technical Field

[0001] The utility model relates to elastic body technology, more specifically, it relates to a bridge-type elastic body. Background Art

[0002] A bridge-type weighing sensor is a weighing element commonly found in weighing platforms at highway entrances, ports, etc. A bridge-type weighing sensor usually includes a base, an elastic body, a sensing element, and a force-transmitting steel ball. The elastic body is fixed to the base by limit bolts. A circular groove for placing the sensing element is provided on the side wall of the elastic part, and a spherical groove is provided on the elastic part to fit the force-transmitting steel ball.

[0003] During use, external pressure is transmitted to the elastic part through the force-transmitting steel ball. The elastic part deforms under the action of pressure. The deformation is captured by the sensing element and generates an electrical signal. The electrical signal is transmitted to the processing equipment and converted into a numerical value that people can read.

[0004] In order to reduce the impact of dust and other factors on the sensing element, a cover for closing the circular groove is installed on the elastic body. In order to prevent the cover from falling out of the circular groove, the existing cover is basically interference fit with the inner wall of the circular groove. At the same time, strong glue is applied between the inner wall of the circular groove and the cover to further reduce the possibility of the cover falling out of the circular groove. However, when the sensing element fails, the above-mentioned arrangement makes the cover and the elastic body have a strong connection, making it more troublesome to remove the cover.

[0005] Therefore, new solutions need to be proposed to solve this problem. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a bridge-type elastic body.

[0007] The above technical objectives of the present utility model are achieved through the following technical solutions: a bridge-type elastomer, comprising an elastic body in the form of a rectangular parallelepiped, a plurality of circular grooves for placing sensing elements are provided on two opposite side walls of the elastic body, two through holes for passing limit bolts are provided on the top surface of the elastic body, and an insertion groove coaxially arranged with the circular groove is further provided on the elastic body, the insertion groove is partially covered by a cover, the maximum diameter of the insertion groove is greater than the outer diameter of the cover, and the minimum diameter of the insertion groove is smaller than the outer diameter of the cover.

[0008] The utility model is further configured as follows: the cross section of the extending groove is a right triangle, and the two side walls of the extending groove are perpendicular to each other.

[0009] The present invention is further configured as follows: the circular groove includes an embedding groove and a placement groove communicated with the embedding groove, the placement groove is used to accommodate the sensing element, and the diameter of the inner circumferential wall of the embedding groove is larger than the diameter of the inner circumferential wall of the placement groove.

[0010] The present invention is further configured as follows: a rounded corner is provided between the inner peripheral wall and the bottom wall of the placement groove.

[0011] The present invention is further configured such that the surface roughness of the bottom wall of the placement groove is not greater than 0.8 microns.

[0012] The utility model is further configured as follows: the upper and lower edges of the through hole are both inverted at right angles.

[0013] The utility model is further configured as follows: the elastic body is made of 42CrMo, and the surface of the elastic body is chemically nickel-plated.

[0014] In summary, the utility model has the following beneficial effects: when the sensing element fails, maintenance personnel can use tools such as crowbars to remove the cover by inserting the end of the crowbar into the slot and positioning it below the cover, so that the crowbar contacts the side wall of the slot, and then apply pressure to the crowbar. Through the lever principle, the crowbar applies a force to the edge of the cover above the slot to move it back toward the elastic body, so that the cover can be removed more conveniently, making it easier for the operator to replace the faulty sensing element. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional view of the front view of the utility model;

[0016] Figure 2 It is a top sectional view of the utility model;

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0018] In the figure: 1, elastic body; 2, through hole; 3, insertion groove; 4, embedding groove; 5, placement groove. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0020] Bridge elastic body, such as Figures 1 to 3As shown, it includes an elastic body 1 in the form of a rectangular parallelepiped, and a plurality of circular grooves for placing sensing elements are provided on the two opposite side walls of the elastic body 1. The top surface of the elastic body 1 is provided with two through holes 2 for passing limit bolts. The top surface of the elastic body 1 is also provided with a spherical groove for fitting with a force-transmitting steel ball. The elastic body 1 is also provided with an insertion groove 3 arranged coaxially with the circular groove. The insertion groove 3 is partially covered by a cover. The maximum diameter of the insertion groove 3 is larger than the outer diameter of the cover, and the minimum diameter of the insertion groove 3 is smaller than the outer diameter of the cover. When the sensing element fails, the maintenance personnel can use a tool such as a crowbar to remove the cover. By inserting the end of the crowbar into the insertion groove 3 and positioning it below the cover, the crowbar is in conflict with the side wall of the insertion groove 3, and then applying pressure to the crowbar, the crowbar is used to apply a force to the edge of the cover above the insertion groove 3 to move back toward the elastic body 1 through the lever principle, so that the cover can be removed more conveniently, making it convenient for the operator to replace the faulty sensing element.

[0021] like Figures 1 to 3As shown, the cross section of the insertion groove 3 is a right triangle, and the two side walls of the insertion groove 3 are perpendicular to each other. This arrangement makes the distance between the side wall of the insertion groove 3 close to the circular groove and the inner circumferential wall of the circular groove larger as it approaches the bottom wall of the circular groove. This makes the wall thickness of the elastic body 1 close to the opening of the circular groove thinner. When the cover is embedded, it is convenient for the inner circumferential wall of the circular groove to deform, so that the cover can be embedded in the circular groove more easily. The circular groove includes an embedding groove 4 and a placement groove 5 connected to the embedding groove 4. The placement groove 5 is used to accommodate the sensing element. The diameter of the inner circumferential wall of the embedding groove 4 is larger than the diameter of the inner circumferential wall of the placement groove 5. When the spherical groove on the elastic body 1 is subjected to the pressure transmitted by the force-transmitting steel ball, When the force generates deformation, the inner peripheral wall of the placement groove 5 will first deform along with the deformation of the elastic body 1, and the deformed inner peripheral wall of the placement groove 5 will then transfer this deformation to the bottom wall of the embedding groove 4, and finally transfer it to the inner peripheral wall of the embedding groove 4 through the bottom wall of the embedding groove 4, which can effectively slow down the speed at which the deformation is transferred to the inner peripheral wall of the embedding groove 4, thereby reducing the possibility of the cover being separated from the embedding groove 4 due to deformation. There is a rounded corner between the inner peripheral wall and the bottom wall of the placement groove 5. Specifically, a ball-end milling cutter is used to fine-process and form a rounded corner between the inner peripheral wall and the bottom wall of the placement groove 5. This setting can effectively remove burrs in the placement groove 5 and improve the surface flatness of the placement groove 5. The smoothness is convenient for the subsequent installation of the sensing element. The surface roughness of the bottom wall of the placement groove 5 is not greater than 0.8 microns. This setting makes the surface of the bottom wall of the placement groove 5 relatively flat. After the sensing element is installed, the fit between the sensing element and the bottom wall of the placement groove 5 can be improved to ensure the measurement accuracy of the sensing element. The upper and lower edges of the through hole 2 are both inverted at right angles. When the elastic body 1 is deformed by an external force, the inner wall of the through hole 2 will move relative to and conflict with the limit bolt, and stress will be formed at the conflicting position. The setting of the inverted right angle can reduce the possibility of stress concentration between the inner wall of the through hole 2 and the limit bolt, which can better To disperse stress and reduce the possibility of damage to the elastic body 1 due to stress concentration, the elastic body 1 is made of 42CrMo, and the surface of the elastic body 1 is chemically nickel-plated. 42CrMo is a high-strength alloy steel with high strength and high toughness. The elastic body 1 made of this material can better adapt to the frequently stressed working environment and can restore its original shape in time after the external force disappears, so that the elastic body 1 has a longer service life. Nickel plating on the surface of the elastic body 1 can improve the wear resistance of the surface of the elastic body 1, and the use of chemical nickel plating can ensure the uniformity of the nickel coating on the surface of the elastic body 1.

[0022] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A bridge-type elastic body, comprising an elastic body (1) in the form of a rectangular parallelepiped, wherein two opposite side walls of the elastic body (1) are provided with a plurality of circular grooves for placing sensing elements, and a top surface of the elastic body (1) is provided with two through holes (2) for passing limit bolts, characterized in that: The elastic body (1) is also provided with an insertion groove (3) coaxially arranged with the circular groove, the insertion groove (3) being partially covered by the cover, the maximum diameter of the insertion groove (3) being larger than the outer diameter of the cover, and the minimum diameter of the insertion groove (3) being smaller than the outer diameter of the cover.

2. The bridge-type elastic body according to claim 1, characterized in that: The cross section of the extending groove (3) is a right triangle, and the two side walls of the extending groove (3) are perpendicular to each other.

3. The bridge-type elastic body according to claim 1, characterized in that: The circular groove comprises an embedding groove (4) and a placement groove (5) communicated with the embedding groove (4), the placement groove (5) is used to accommodate the sensing element, and the diameter of the inner peripheral wall of the embedding groove (4) is larger than the diameter of the inner peripheral wall of the placement groove (5).

4. The bridge-type elastic body according to claim 3, characterized in that: There is a rounded corner between the inner peripheral wall and the bottom wall of the placement groove (5).

5. The bridge-type elastic body according to claim 4, characterized in that: The surface roughness of the bottom wall of the placement groove (5) is no greater than 0.8 microns.

6. The bridge-type elastic body according to claim 1, characterized in that: The upper and lower edges of the through hole (2) are both inverted at right angles.

7. The bridge-type elastic body according to claim 1, characterized in that: The elastic body (1) is made of 42CrMo, and the surface of the elastic body (1) is chemically nickel-plated.

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