CN211425605U

CN211425605U - All-round protection weighing module

Info

Publication number: CN211425605U
Application number: CN202020385086.5U
Authority: CN
Inventors: 初大伟; 孙纯国
Original assignee: Yantai Junjie Weighing Apparatus Co ltd
Current assignee: Yantai Junjie Weighing Apparatus Co ltd
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2020-09-04
Anticipated expiration: 2030-03-24

Abstract

The utility model relates to an all-round protection weighing module belongs to resistance strain gauge weighing sensor technical field. Including the bearing plate that is connected with the bearing plate, the base and locate the weighing sensor between bearing plate and the base, its characterized in that weighing sensor's stiff end, the stiff end guard plate is installed respectively to the loading end, the loading end guard plate, the stiff end guard plate, the protecting against shock blotter is all installed respectively to the one side of loading end guard plate towards the bearing plate, weighing sensor's loading end is equipped with the reverse anti unbalance loading mechanism of structural longitudinal symmetry, the mechanism is carried to forward anti unbalance loading, weighing sensor is located reverse anti unbalance loading mechanism, forward anti overload stop gear between. The utility model discloses the protecting against shock energy-absorbing is effectual, possesses forward, reverse unbalance loading prevention function simultaneously, and the precision is high, and stability is good.

Description

All-round protection weighing module

Technical Field

The utility model relates to an all-round protection weighing module belongs to resistance strain gauge weighing sensor technical field.

Background

In recent years, electronic scales are widely used due to the advantages of compact structure, visual reading, high weighing speed, high precision, convenience in carrying and the like. The application field of the method has penetrated the aspects of national economy and daily life of people. China produces electronic scales in a large country, the production capacity of the electronic scales accounts for more than 70% of the world, and hundreds of millions of commercial electronic weighing machines and household electronic weighing machines are produced annually. With the gradual extension and expansion of the application field of electronic scales, a waterproof electronic scale suitable for the aquatic product industry and the food production industry is developed to adapt to the use characteristics of water resistance, moisture resistance and corrosion resistance. The common method is to package the circuit part of the electronic scale by a box and glue, and isolate the circuit part from the outside to achieve the purposes of water resistance and corrosion resistance. The weighing sensor is exposed, and only the surface of the sensor is coated with anticorrosive grease or paint; the second method is to use a rubber sleeve to encapsulate the sensor, so that the sensor is isolated from the outside to achieve the purposes of water resistance and corrosion resistance. The two approaches to sensor protection have the following disadvantages. For the first method, although the surface of the sensor is coated with anticorrosive grease or paint, the protection effect is not ideal due to corrosion on molecular scale and chemical reaction and galvanic cell reaction; in the second method, because the rubber sleeve is additionally arranged on the sensor, although the sensor is isolated from the outside, the stress deformation of the sensor is also influenced, so that the display speed of the scale is reduced, and the method is unacceptable for an operator who takes the salary of the measuring piece. Meanwhile, due to the reinforcing effect of the rubber sleeve and the change of the internal gas pressure along with the change of the environmental temperature, the electronic scale cannot achieve the weighing precision or even cannot be used when weighing for a short time. Especially, the protection method can not be used for the electronic scale with the measuring range less than or equal to 3 kg.

Patent numbers: ZL2017205858678.7, patent name: the utility model provides a combined type overload weighing module, discloses installs spacing jackscrew additional below the loading end of sensor and carries out overload protection, and when load exceeded the rated range of sensor, spacing jackscrew will withstand the loading end of sensor for the sensor no longer continues to warp, thereby reaches overload protection's purpose. The limit mode has the disadvantage that when the electronic scale bears unbalance loading, the electronic scale is easy to be distorted and damaged due to the lever action of the force arm. At present, manufacturers of electronic scales do not consider reverse limiting of sensors. In addition, in the daily use of the electronic scale, the phenomenon that the object to be weighed falls and is thrown to the weighing platform occurs, the impact force formed by the abnormal load weighing sensor is quite large, and the load formed by the impact force is usually several times or even tens of times of the static load. The failure mode analysis of the weighing sensors shows that the damage of the weighing sensors caused by the impact force accounts for about 60% of the total damage quantity, and for this point, the existing electronic scale manufacturers do not consider all the time.

Disclosure of Invention

An object of the utility model is to solve the weak point that above-mentioned prior art exists, provide a protecting against shock energy-absorbing effectual, possess forward, reverse unbalance loading prevention function simultaneously, the precision is high, the good all-round protection weighing module of stability.

The utility model discloses an all-round protection weighing module, including the bearing plate that is connected with the bearing plate, the base and locate the weighing sensor between bearing plate and the base, its special character lies in that the stiff end of weighing sensor, the loading end are installed the stiff end guard plate respectively, the loading end guard plate, the stiff end guard plate, the loading end guard plate all installs protecting against shock blotter respectively towards the one side of bearing plate, the loading end of weighing sensor is equipped with reverse anti unbalance loading mechanism, the forward anti unbalance loading mechanism of structural longitudinal symmetry, weighing sensor is located between reverse anti unbalance loading mechanism, the forward anti overload stop gear;

the reverse anti-unbalance-loading mechanism comprises two reverse anti-unbalance-loading limiting screws arranged on a protection plate at a loading end, the two reverse anti-unbalance-loading limiting screws are adjustable in upper and lower positions and are distributed on two sides of the weighing sensor in the width direction, the forward anti-overload limiting mechanism comprises two forward anti-unbalance-loading limiting screws arranged on a base, the forward anti-unbalance-loading limiting screws and the reverse anti-unbalance-loading limiting screws are identical in structure and are symmetrical up and down, and anti-unbalance-loading limiting gaps are reserved among the reverse anti-unbalance-loading limiting screws, the forward anti-unbalance-loading limiting screws and the weighing sensor;

a reverse overload-preventing limiting screw with an adjustable upper position and a lower position is arranged between the two reverse unbalance-resisting limiting screws, a forward overload-preventing limiting screw with an adjustable upper position and a lower position is arranged between the two forward unbalance-resisting limiting screws, and overload-preventing limiting gaps are reserved among the reverse overload-preventing limiting screw, the forward overload-preventing limiting screw and the weighing sensor;

the fixed end of the weighing sensor is connected with the base through a fixed end fastening screw, the loading end of the weighing sensor is connected with the pressure bearing plate and the loading end protection plate through a loading end fastening screw, and the base and the fixed end protection plate and the base and the loading end protection plate are installed into a whole through protection plate positioning pins;

the anti-impact cushion is made of silicon rubber;

the bearing plate and the base are formed by die-casting environment-friendly alloy steel, and a high-corrosion-resistant coating layer is sprayed on the surface of the bearing plate and the base.

The utility model discloses an all-round protection weighing module has increased the protecting against shock blotter, plays the ability that the absorption impact produced, reduces the effect of impact force to prevent the destruction of impact load weighing cell sensor, be equipped with just, reverse anti unbalance loading mechanism in addition, just, reverse overload protection mechanism realizes two-way protection, has overcome still can protect the phenomenon of inefficacy after the unbalance loading reaches a critical value, makes the protection more perfect, has advantages such as precision height, stability.

Drawings

FIG. 1: the utility model relates to a structure schematic diagram of an all-round protection weighing module;

FIG. 2: FIG. 1 is a top view;

FIG. 3: bottom view of fig. 1;

FIG. 4: FIG. 1 is a top view with a bearing plate removed;

FIG. 5: FIG. 1 is a schematic view of section A-A;

FIG. 6: FIG. 1 is a schematic view of a cross-sectional view B-B;

FIG. 7: FIG. 1 is a schematic view of a cross-sectional view C-C;

FIG. 8: FIG. 1 is a schematic view of a cross-sectional view taken along line D-D.

In the figure: 1. a pressure bearing plate; 2. an impact-resistant cushion; 3. a fixed end protection plate; 4. A guard plate locating pin; 5. a base; 6. a weighing sensor; 7. a loading end protection plate; 8. a fixed end fastening screw; 9. an anti-unbalance loading limit screw; 10. a reverse overload prevention limit screw; 11. a positive overload prevention limit screw; 12. a loading end fastening screw; 13. a reverse anti-unbalance loading limit screw; 14. an anti-unbalance loading limit gap; 15. prevent the spacing clearance of transshipping.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-8, the present invention provides an all-directional protection weighing module, which includes a base 5 connected to a base of a scale; a bearing plate 1 connected to a bearing plate for weighing a heavy object; a load cell 6 for weighing; a forward overload prevention limit screw 11 for preventing forward overload; a reverse overload prevention limit screw 10 for preventing reverse overload; a fixed end fastening screw 8 and a loading end fastening screw 12 for fixing the pressure bearing plate 1, the base 5 and the load cell 6 together; a fixed end protection plate 3 for protecting the fixed end of the weighing sensor; a loading end protection plate 7 for protecting the loading end of the weighing sensor; an energy-absorbing impact-proof cushion 2 for impact resistance; a forward anti-unbalance loading limit screw 9 and a reverse anti-unbalance loading limit screw 13, which are shown in the attached drawings 1-8 in detail.

The specific connection relationship of the components is as follows: a fixed end protection plate 3 and a loading end protection plate 7 are respectively installed at the fixed end and the loading end of the weighing sensor 6, impact-proof cushion pads 2 are respectively installed on one surfaces, facing the bearing plate 1, of the fixed end protection plate 3 and the loading end protection plate 7, a reverse anti-unbalance loading mechanism and a forward anti-unbalance loading mechanism which are vertically symmetrical in structure are arranged at the loading end of the weighing sensor 6, and the weighing sensor 6 is located between the reverse anti-unbalance loading mechanism and the forward anti-overload limiting mechanism;

the reverse anti-unbalance-loading mechanism comprises two reverse anti-unbalance-loading limiting screws 13 arranged on the loading end protection plate 7, the two reverse anti-unbalance-loading limiting screws 13 are adjustable in upper and lower positions and are distributed on two sides of the weighing sensor 6 in the width direction, the forward anti-overload limiting mechanism comprises two forward anti-unbalance-loading limiting screws 9 arranged on the base 5, the forward anti-unbalance-loading limiting screws 9 and the reverse anti-unbalance-loading limiting screws 13 are identical in structure and are symmetrical up and down, and anti-unbalance-loading limiting gaps 14 are reserved among the reverse anti-unbalance-loading limiting screws 13, the forward anti-unbalance-loading limiting screws 9 and the weighing sensor 6;

a reverse overload-preventing limit screw 10 with an adjustable upper position and a lower position is arranged between the two reverse unbalance-preventing limit screws 13, a forward overload-preventing limit screw 11 with an adjustable upper position and a lower position is arranged between the two forward unbalance-preventing limit screws 9, and overload-preventing limit gaps 15 are reserved among the reverse overload-preventing limit screw 10, the forward overload-preventing limit screw 11 and the weighing sensor 6;

the stiff end of weighing sensor 6 is connected with base 5 through stiff end fastening screw 8, the loading end of weighing sensor 6 is connected with bearing plate 1, loading end guard plate 7 through loading end fastening screw 12, and base 5 all installs as an organic wholely through guard plate locating pin 4 with stiff end guard plate 3, base 5 and loading end guard plate 7.

The bearing plate 1 and the base 5 are formed by die-casting environment-friendly alloy steel, and the surfaces of the bearing plate and the base are sprayed with high-corrosion-resistance paint which is stable in chemical property, nontoxic and tasteless. The forward overload-proof limit screw 11 penetrates through the base 5 to form a gap with the lower end face of the loading end of the weighing sensor 6, the gap is a forward overload-proof limit gap 15, the forward overload-proof limit gap 15 is changed according to the measuring range of the sensor, and the forward load can be limited so as to prevent the weighing sensor 6 from being damaged due to overload. The reverse overload prevention limiting screw 10 penetrates through the loading end protection plate 7 to form a gap with the upper end face of the loading end of the weighing sensor 6, the gap is a reverse overload prevention limiting gap 15, the reverse overload prevention limiting gap 15 is changed according to the measuring range of the sensor, and reverse load can be limited so as to prevent the weighing sensor 6 from being damaged due to reverse overload. The anti-unbalance loading limit screw 9 penetrates through the base 5 and forms a gap with the lower end face of the loading end of the weighing sensor 6, and the gap is a positive anti-unbalance loading limit gap 14; the reverse anti-unbalance loading limiting screw 13 penetrates through the loading end protection plate 7 to form a gap with the upper end face of the loading end of the weighing sensor 6, and the gap is a reverse anti-unbalance loading limiting gap 14; the forward and reverse anti-unbalance-loading limit gaps are changed according to the measuring range of the sensor, and the unbalance loading can be subjected to composite limitation in the forward and reverse directions so as to prevent the damage of the weighing sensor 6 caused by the unbalance loading. Arrange the protecting against shock blotter 2 between bearing plate 1 and stiff end guard plate 3 and the load end of weighing sensor 6 in, play the ability that the absorption impact produced, reduce the effect of impact force.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an all-round protection weighing module, include the bearing plate that is connected with the bearing disc, the base and locate the weighing sensor between bearing plate and the base, its characterized in that weighing sensor's stiff end, the stiff end guard plate is installed respectively to the loading end, the loading end guard plate, the stiff end guard plate, the protecting against shock blotter is all installed respectively to the one side of loading end guard plate towards the bearing plate, weighing sensor's loading end is equipped with the reverse anti unbalance loading mechanism of structural longitudinal symmetry, the anti unbalance loading mechanism of forward, weighing sensor is located reverse anti unbalance loading mechanism, the forward is prevented transshipping between the stop gear.

2. The module of claim 1, wherein the reverse anti-unbalance loading mechanism comprises two reverse anti-unbalance loading limit screws mounted on the loading end protection plate, the two reverse anti-unbalance loading limit screws are adjustable in up-down position and are arranged on two sides of the weighing sensor in the width direction, the forward anti-overload limit mechanism comprises two forward anti-unbalance loading limit screws mounted on the base, the forward anti-unbalance loading limit screws and the reverse anti-unbalance loading limit screws are identical in structure and are symmetrical up and down, and anti-unbalance loading limit gaps are reserved among the reverse anti-unbalance loading limit screws, the forward anti-unbalance loading limit screws and the weighing sensor.

3. The module of claim 2, wherein a reverse overload stop screw is disposed between the two reverse anti-unbalanced load stop screws, and a forward overload stop screw is disposed between the two forward anti-unbalanced load stop screws, and the overload stop screws, the forward overload stop screws and the weighing sensor are spaced apart from each other by an overload stop gap.

4. The all-round protection weighing module of claim 1, characterized in that the stiff end of weighing sensor is connected with the base through stiff end fastening screw, the loading end of weighing sensor is connected with bearing plate, loading end guard plate through loading end fastening screw, base and stiff end guard plate, base and loading end guard plate all install as an organic whole through guard plate locating pin.

5. The all-round protective weighing module of claim 1, wherein said impact-resistant cushion is an impact-resistant cushion made of a silicone rubber material.

6. The all-round protection weighing module of claim 1, characterized in that the bearing plate and the base are die-cast from environmental alloy steel, and the surface of the bearing plate and the base is coated with a high corrosion-resistant coating.