CN213364010U

CN213364010U - Overload protection device for weighing sensor

Info

Publication number: CN213364010U
Application number: CN202022744147.5U
Authority: CN
Inventors: 崔洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-06-04
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a weighing sensor's overload protection device. A pressure-bearing piston with the periphery matched with an upper pressure-bearing head and a spring sleeved on the pressure-bearing piston are additionally arranged at the top of a ball of an existing pressure-bearing assembly, and limit blocks which are symmetrically arranged are arranged on a weighing platform part corresponding to the bottom of a weighing plate. Because the pressure-bearing piston and the spring structure are arranged on the basis of the prior art, when a heavy object exceeding the safety overload value of the weighing sensor is arranged on the weighing plate, the weighing plate compresses the spring bearing the designated weight through the buffer sleeve and the upper body of the pressure-bearing head, so that the weighing plate moves downwards and contacts with the limiting block, and the pressure generated by the weight exceeding the overload range is transferred to the weighing platform through the limiting block, thereby effectively avoiding the overload damage caused by the weighing sensor and playing a safety protection role practically. Moreover, the utility model also has the advantages of novel inventive concept, simple and practical structure, stable working performance, and suitability for popularization.

Description

Overload protection device for weighing sensor

Technical Field

The utility model relates to a weighing sensor's protector especially relates to the protector that the overload damage of weighing sensor in the use carried out the protection.

Background

As is known, a weighing sensor is an electronic weighing device, also called an electronic scale. It is widely applied to production of various industries and life of people. The existing weighing sensor is formed by arranging a pressure head lower body which is connected with a pressure head upper body and a pressure head lower body in a threaded manner by a pressure head upper body and a pressure head lower body which are sleeved with a buffer sleeve between the bottom of a weighing plate in a weighing platform, arranging a dust ring which is fixed with a pressure seat into a whole in a bottom opening of the pressure head lower body, and arranging a pressure bearing assembly which consists of upper balls which are contacted with the pressure head upper body and lower balls which are contacted with the dust ring in an inner space formed by the pressure head upper body and the pressure head lower body. And the pressure bearing assembly is a weighing sensor and an important component thereof. As is well known in the art, each weighing sensor has a corresponding weighing range (corresponding to the load-bearing capacity), the safety overload level is typically about 150% of the range, and due to the structural limitations of the conventional weighing sensor (no corresponding overload protection measures have been taken in the past), all the weight of the weighing sensor acts on the sensor through the pressure-bearing assembly during operation, and the weighing sensor can be permanently damaged once the weighing sensor exceeds the overload range. Accordingly, there is a need in the art for a protection device for a load cell against overload damage to solve the problem of overload damage during use of the load cell. But has not been solved for a long time.

Disclosure of Invention

An object of the utility model is to provide a weighing sensor's overload protection device, it can really play effectual protection to the sensor under the weighing sensor overload condition, makes the problem that prior art exists thoroughly solve.

The technical scheme of the utility model as follows: the device comprises a weighing platform, a weighing disk, a buffer sleeve, an upper bearing head body, a lower bearing head body, balls, a dustproof ring and a bearing seat, wherein a bearing piston with the periphery matched with the upper bearing head body and a spring sleeved on the bearing piston are additionally arranged at the top of the balls forming a bearing assembly, and the weighing platform part corresponding to the bottom of the weighing disk is provided with symmetrically arranged limit blocks.

The utility model has the advantages that: because the pressure-bearing piston and spring structure arranged on the basis of the existing pressure-bearing head assembly is adopted, when a weight exceeding the safety overload value of the weighing sensor is arranged on the weighing plate, the weighing plate compresses the spring bearing the specified weight through the buffer sleeve and the upper body of the pressure-bearing head, so that the weighing plate moves downwards and is in contact with the limiting block, and thus, the pressure generated by the weight exceeding the overload range is transferred to the weighing platform through the limiting block, thereby effectively avoiding the overload damage caused by the weighing sensor and practically playing a safety protection role. Moreover, the utility model also has the advantages of novel inventive concept, simple and practical structure, stable working performance, and suitability for popularization.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the present invention;

figure 2 is a schematic view of the closest prior art structure.

Detailed Description

The overload protection device for the weighing sensor shown in fig. 1 is a novel protection device designed on the basis of the prior art and used for protecting the weighing sensor from overload damage. The middle part of the top of the weighing plate is a weighing plate 3, the outer side of the weighing plate 3 is a weighing platform 1, the bottom of the weighing plate 3 is a pressure-bearing head upper body 5 sleeved with a buffer sleeve 4, and the pressure-bearing head upper body 5 and a pressure-bearing head lower body 8 arranged at the lower part of the pressure-bearing head upper body are connected into a whole through threads; a pressure-bearing piston 6 is arranged in a space formed by the upper pressure-bearing head body 5 and the lower pressure-bearing head body 8, the pressure-bearing piston 6 is an upper stepped cylinder and a lower stepped cylinder, and a connecting member formed by arc-shaped curved surfaces corresponding to the top of the dust ring 9 is arranged on the bottom surface of the lower stepped cylinder. And, the spring 7 is sleeved outside the upper stepped cylinder of the pressure-bearing piston 6, i.e., at the shoulder of the upper and lower stepped cylinders. The spring 7 may be of disc or spiral construction. The ball 10 is arranged between the pressure-bearing piston 6 and the dust ring 9; the bottom of the dust ring 9 is provided with a bearing seat 11, and the bearing seat 11 connects and fixes the bearing assembly on the sensor 12 through a connecting bolt. Meanwhile, the part of the weighing platform 1 corresponding to the bottom of the weighing disk 3 is provided with symmetrically arranged limit blocks 2, and the limit blocks 2 are adjusted and fixed by limit adjusting screws 13. When the limiting height of the limiting block 2 is adjusted, the limiting height is smaller than the maximum collapse amount of the spring 7.

When the utility model works, the weight is transferred to the weighing sensor 12 by the pressure bearing assembly to carry out normal sensing measurement when the weighed weight is not higher than the normal allowable value; when the weighing disc 3 is provided with a heavy object exceeding the safety overload value of the weighing sensor 12, the spring 7 bearing the specified weight is compressed by the weighing disc 3 through the buffer sleeve 4 and the pressure-bearing head upper body 5, the spring 7 collapses, the weighing disc 3 moves down to contact with the limiting block 2, and at the moment, the pressure generated by the weight within the overload range is transferred to the weighing platform 1 through the limiting block 2, so that the overload damage caused by the weighing sensor is effectively avoided, and the safety protection effect is practically realized. When the overload disappears, the spring 7 resets, and the device automatically restores to a normal weighing state.

Claims

1. The utility model provides a weighing sensor's overload protection device, includes weighing platform (1), weighing dish (3), cushion collar (4), pressure head upper part of the body (5), pressure head lower part of the body (8), ball (10), dust ring (9) and pressure bearing seat (11), its characterized in that: the top of a ball (10) forming the pressure-bearing assembly is additionally provided with a pressure-bearing piston (6) the periphery of which is matched with the upper body (5) of the pressure-bearing head and a spring (7) sleeved on the pressure-bearing piston (6), and the part of the weighing platform (1) corresponding to the bottom of the weighing disk (3) is provided with symmetrically arranged limit blocks (2).

2. The overload protection device for the weighing sensor as recited in claim 1, wherein: the pressure-bearing piston (6) is an upper and lower stepped cylinder, and a connecting member consisting of arc-shaped curved surfaces corresponding to the top of the dust ring (9) is arranged on the bottom surface of the lower stepped cylinder.

3. The overload protection device for the weighing sensor as recited in claim 1, wherein: the limiting block (2) is adjusted and fixed by a limiting adjusting screw (13), and when the limiting height of the limiting block (2) is adjusted, the limiting height is smaller than the maximum collapse amount of the spring (7).