CN214224327U

CN214224327U - Active weighing sensor

Info

Publication number: CN214224327U
Application number: CN202022476804.2U
Authority: CN
Inventors: 滕冠军
Original assignee: Individual
Current assignee: Shandong Hardware Research Institute; Teng Guanjun
Priority date: 2020-11-01
Filing date: 2020-11-01
Publication date: 2021-09-17
Anticipated expiration: 2030-11-01

Abstract

Different from the existing passive weighing sensor, the active weighing sensor can be controlled to ascend and descend automatically, and whether weighing is carried out or not is actively determined. The weighing sensor has the advantages that the impact generated by the weighing sensor when a heavy object is loaded is avoided, the service life of the weighing sensor can be prolonged, and the weighing error caused by the change of the machine body can be reduced.

Description

Active weighing sensor

Technical Field

The invention relates to a weighing sensor used for an electronic weighing apparatus, in particular to a weighing sensor used for a large-scale electronic weighing apparatus.

Background

With the development of science and technology, electronic weighing instruments are already common. One of the key components of an electronic weighing apparatus is a load cell. The weight, which is usually placed on a load-bearing platform, transfers the weight force to the load cell, which converts the changes caused by the weight force into electrical signals, which are then transmitted, processed and digitally reflected on the weight indicator. This load cell, which is a load cell that places a weight and weighs immediately, is defined as a passive load cell.

The active weighing sensor is a novel weighing sensor designed for an active weighing electronic weighing apparatus (patent number: 202020195364.0).

Disclosure of Invention

The active weighing sensor mainly comprises a weighing sensor and a lifting mechanism. And a lifting mechanism is arranged below the weighing sensor, and the lifting of the weighing sensor is controlled according to the working requirement.

A concave spherical seat is added on the spherical surface at the top end of the weighing sensor.

Optimally, the anti-falling device is added to the concave spherical seat.

Optimally, the concave spherical seat is added with the elastic buffer cushion, so that the impact of the weighing sensor during loading heavy objects can be reduced, and the weighing sensor can be quickly separated from the rigid contact with the bearing table when the active weighing sensor falls.

A limiting device is additionally arranged on the lifting mechanism at the lower end of the active weighing sensor to control the lifting height of the weighing sensor. Generally, the thickness is controlled to be less than 10 mm.

When the active weighing sensor is not used for weighing, the active weighing sensor is positioned between the foundation and the bearing platform and is only in rigid connection with one of the foundation or the bearing platform.

When weighing, the active weighing sensor jacks up the bearing platform. The gravity of the bearing platform and the weight on the bearing platform is completely transmitted to the active weighing sensor, so that weighing is realized.

Drawings

FIG. 1 is a schematic view of an active load cell;

FIG. 2 is a cross-sectional view of the active load cell of FIG. 1;

FIG. 3 is a top view of an active load cell;

fig. 4 is a sealing plug screw in an active load cell.

Shown in the figure: 2, a weighing sensor, 21, 22, 23 and 24 are respectively a concave spherical pad, an elastic buffer pad, an anti-falling bolt and a data line connector; 3 is a cylinder body; 31 is a fixing bolt, 32 is an oil pipe joint, 33 is a limiting bolt, 34 is a sealing plug screw, and 341 is an oil seal groove. 35 is a screw plug oil seal, 36 is a cylinder oil seal, and 37 is a cylinder base.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following description will be made with reference to the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As can be seen by combining fig. 1, 2, 3 and 4, the active load cell mainly comprises a load cell 2 and a cylinder 3; the top end of the weighing sensor is provided with a concave spherical pad 21 which is positioned on the spherical surface of the top end of the weighing sensor 2 and plays a role of enabling gravity to pass through the center of the weighing sensor; the concave spherical pad 21 can swing only by a small amount within the restriction of the drop-off preventive bolt 23. The concave spherical pad 21 is provided with an elastic buffer pad 22 which can make the weighing sensor quickly get out of rigid contact with the bearing platform and keep a certain gap when falling.

The lower part of the weighing sensor 2 is made into a piston which is arranged in the cylinder body 3, and the piston and the cylinder body are combined to form a lifting mechanism. Pressing hydraulic oil into the cylinder body 3 through the oil pipe joint 32 can jack up the weighing sensor 2, and after the elastic buffer cushion 22 is compressed, the concave spherical cushion 21 is in contact with the bearing table and jacks up the bearing table and a heavy object on the table; at this time, the weighing sensor 2 bears the whole gravity, and weighing is realized. The weighing data are transmitted via the data interface 24.

The limit bolt 33 is used for controlling the maximum height of the load cell jack-up, and generally does not exceed 10 mm.

An oil seal groove 341 is processed on the sealing screw plug 34, a screw plug oil seal 35 is placed in the oil seal groove, and then the sealing screw plug 34 and the screw plug are screwed into the bottom of the cylinder body 3 to realize leakage prevention.

A cylinder oil seal 36 is placed in a groove machined in the cylinder body to serve as a piston seal.

The active load cell is mounted on the foundation using the bottom cylinder mount 37 and the fixing bolt 31.

The embodiment uses the hydraulic pressure to control the lifting of the weighing sensors, so that a plurality of weighing sensors can uniformly bear the gravity. Of course, hydraulic control is not the only possible solution.

The plunger weighing sensor which is easy to manufacture and low in cost is adopted in the embodiment as a basic design, and the design idea is also suitable for other types of weighing sensors.

The modification of the electronic weighing apparatus by the active weighing sensor has been described in detail in "active weighing electronic weighing apparatus" (patent No. 202020195464.0); data transmission, data processing devices, weighing indicators, hydraulic drives, etc. all adopt the prior art, and are not described in detail.

Claims

1. An active weighing sensor, characterized by: the active weighing sensor is formed by combining an upper weighing sensor and a lower cylinder body, the lower end of the retransmission sensor is made into a piston and is arranged in the cylinder body, the top end of the weighing sensor is provided with a concave spherical seat capable of swinging, and an anti-falling bolt for preventing the concave spherical seat from falling off is juxtaposed; and a limiting bolt for controlling the lifting height of the weighing sensor is added at the bottom of the weighing sensor.

2. The active load cell of claim 1, wherein: an elastic buffer pad is added on the concave spherical seat.

3. The active load cell of claim 1, wherein: the bottom of the cylinder body is provided with a sealing screw plug and a screw plug oil seal.