CN204495457U

CN204495457U - LOAD CELLS shock resistance and overload protection arrangement

Info

Publication number: CN204495457U
Application number: CN201520130239.0U
Authority: CN
Inventors: 陈青根
Original assignee: Huo Dinggebaoerwen (suzhou) Electronic Measurement Technique Co Ltd
Current assignee: Huodinggebikai (Suzhou) Electronic Measurement Technology Co., Ltd
Priority date: 2015-03-06
Filing date: 2015-03-06
Publication date: 2015-07-22
Anticipated expiration: 2025-03-06

Abstract

The utility model discloses a kind of LOAD CELLS shock resistance and overload protection arrangement, comprise scale pan mechanism, sensor, overload protection assembly and base, scale pan mechanism and base are used for the shock resistance and the overload protection that sensor are played to forward, scale pan mechanism is fixed on above sensor, it comprises support, the scale pan and spring, spring is fixed on scale pan bottom surface, and the scale pan moves up and down along support under spring force effect, base is fixed on below sensor, and its upper end contacts with the bottom surface of the scale pan when scale pan load, overload protection assembly comprises the angle bar be all fixedly connected with sensor and base and the nut be arranged on angle bar, when the scale pan is subject to pulling force upwards and makes sensor upwards be out of shape and reach setting value, angle bar contacts with nut.The utility model has two-way overload protective function to LOAD CELLS, thus protects sensor well, extends its serviceable life.

Description

LOAD CELLS shock resistance and overload protection arrangement

Technical field

The utility model relates to LOAD CELLS field, especially relates to a kind of LOAD CELLS shock resistance and overload protection arrangement.

Background technology

In some test environment, when the object strikes sensor of falling from high altitude, although the weight of this object is less than the rated load of sensor, the instant impact peak value formed thus considerably beyond the limit load of bearing of sensor, therefore also can cause the damage of sensor.

The protector for sensor of prior art is generally at sensor envisaged underneath one strong point, and when force acting on transducer distortion reaches certain value, sensor contacts with the strong point, protects sensor.

But this technology has following shortcoming: when sensor is subject to impact load, both made the weight of object very little, but because of object and the scale pan extremely short for duration of contact, calculate according to theorem of momentum: (m is mass of object to F=mv/t, v is the spot speed before object contacts with the scale pan, t is the time that object contacts with the scale pan), the force of the breath F produced is very large, the limit weight that sensor can bear may be far longer than, therefore, when sensor is subject to this type of impulsive force, sensor is still very easy to damage.

Utility model content

The purpose of this utility model is the defect overcoming prior art; a kind of LOAD CELLS shock resistance and overload protection arrangement are provided; by designing the scale pan of band spring bumper on a sensor, to reduce the impulsive force peak value of the object of falling from high altitude, thus reach the function of protection sensor.

For achieving the above object; the utility model proposes following technical scheme: a kind of LOAD CELLS shock resistance and overload protection arrangement; comprise scale pan mechanism, sensor and base; described scale pan mechanism is fixed on above described sensor; it comprises support, the scale pan and spring; described spring is fixed on described scale pan bottom surface; and the described scale pan moves up and down along described support under described spring force effect; described base is fixed on below described sensor, and its upper end contacts with the bottom surface of the described scale pan when described scale pan load.

Preferably; described device also comprises overload protection assembly; described overload protection assembly comprises the angle bar be all fixedly connected with described sensor and described base and the nut be arranged on described angle bar; when the described scale pan is subject to pulling force upwards and makes described sensor upwards be out of shape and reach setting value, described angle bar contacts with described nut.

Preferably, described spring is provided with adjustable nut.

Preferably, a pair back up pad that described base comprises base plate and extended upward by described base plate both sides, the upper end of described back up pad contacts with the bottom surface of the described scale pan when described scale pan load.

Preferably, the described scale pan, between sensor and angle bar, and be fixedly connected with by screw between described sensor with described base.

The beneficial effects of the utility model are:

1, the utility model is just designed with the scale pan of band spring bumper on a sensor, and when there being the object strikes sensor of falling from high altitude, instant impact absorbs and slow releasing by spring, reduces its impulsive force peak value, thus reaches the function of protection sensor.

2, the utility model is at sensor envisaged underneath base, supports, play overload protection function further when the scale pan transships to weight; and the scale pan contacts with the whole limit of base, contact area is large, reliably; therefore overload limit value increases, and can reach more than 1000%.

3, the utility model arranges the overload protection assembly of angle bar and nut on a sensor; when being subject to opposite force (namely pulling force) upwards when the scale pan and making sensor upwards be out of shape and reach certain value; angle bar contacts with nut; play reverse overload protection, thus realize two-way (to upper pulling force and downward pressure) protective effect of sensor.

Accompanying drawing explanation

Fig. 1 is the perspective view of the shock resistance of the utility model LOAD CELLS and overload protection arrangement;

Fig. 2 is the decomposition texture schematic diagram of Fig. 1;

Fig. 3 is the perspective view of the utility model scale pan mechanism;

Fig. 4 is the decomposition texture schematic diagram of Fig. 3;

Fig. 5 is the side-looking structural representation of Fig. 1.

Reference numeral: 10, shock resistance and overload protection arrangement, 20, scale pan mechanism, 21, support, 22, the scale pan, 23, spring; 24, adjustable nut, 30, sensor, 40, overload protection assembly, 41, angle bar, 42, nut; 50, base, 51, base plate, 52, back up pad, 60, screw.

Embodiment

Below in conjunction with accompanying drawing of the present utility model, clear, complete description is carried out to the technical scheme of the utility model embodiment.

Shown in composition graphs 1 and Fig. 2; a kind of LOAD CELLS shock resistance that the utility model discloses and overload protection arrangement 10; comprise scale pan mechanism 20, sensor 30, overload protection assembly 40 and base 50; shown in composition graphs 2 ~ Fig. 4; scale pan mechanism 20 is fixed on above sensor 30, for carrying out shock resistance protection to sensor 30.It comprises support 21, the scale pan 22, spring 23 and adjustable nut 24, and spring 23 is fixed on the scale pan 22 bottom surface, and spring 23 is provided with adjustable nut 24.The weight that the utility model embodiment hypothesis scale pan 22 starts to move downward is W1, and it is W2 that sensor 30 starts protected weight.

When weight be placed on the scale pan 22 is weighed time, if weight is very little, as the weight be added on the scale pan 22 is less than W1, because the elastic force of spring 23 pretension enough supports this weight, whole scale pan mechanism 20 is without any action; When weight reaches certain value, as the weight be added on the scale pan 22 be greater than W1 time, because the elastic force of spring 23 pretension does not enough support this weight, spring 23 compression deformation, the scale pan 22 departs from support 21 and moves downward.

Preferably, the gravimetric value W1 making spring 23 start action can be regulated by the adjustable nut 24 below spring 23.Particularly, when adjustable nut 24 is upwards tightened, spring 23 is shortened by compression, and pretightning force increases, and W1 increases.When adjustable nut 24 is tightened downwards, spring 23 shortens, and pretightning force reduces, and W1 diminishes.

The weight of object on the scale pan 22 is converted to electric signal and exports by sensor 30.

Base 50 is fixed on below sensor 30; shown in composition graphs 1, Fig. 2 and Fig. 5; a pair back up pad 52 that base 50 comprises base plate 51 and extended upward by base plate 51 both sides; when being added in the weight on the scale pan 22 and reaching W2; two back up pad 52 upper-end contact of the scale pan 22 bottom surface and base 50; the weight being greater than W2 is born by base 50, is protected to make sensor 30.

Overload protection assembly 40 comprises the nut 42 on angle bar 41 and angle bar 41, and angle bar 41 is all fixedly connected with base 50 with sensor 30, for carrying out reverse overload protection to sensor 30.Particularly, when the scale pan 22 is subject to pulling force upwards and makes sensor 30 upwards be out of shape and reach certain value, angle bar 41 contacts with nut 42, and sensor 30 is protected.The gap A adjustable overload protection value of setting nut 42 and angle bar 41, gap A is less, and the power starting to be subject to overload protection is less.

In addition, the scale pan 22, between sensor 30 and angle bar 41, and be fixedly connected with by screw 60 between sensor 30 with base 50.

Technology contents of the present utility model and technical characteristic have disclosed as above; but those of ordinary skill in the art still may do all replacement and the modification that do not deviate from the utility model spirit based on teaching of the present utility model and announcement; therefore; the utility model protection domain should be not limited to the content that embodiment discloses; and various do not deviate from replacement of the present utility model and modification should be comprised, and contained by present patent application claim.

Claims

1. a LOAD CELLS shock resistance and overload protection arrangement; it is characterized in that; comprise scale pan mechanism, sensor and base; described scale pan mechanism is fixed on above described sensor; it comprises support, the scale pan and spring, and described spring is fixed on described scale pan bottom surface, and the described scale pan moves up and down along described support under described spring force effect; described base is fixed on below described sensor, and its upper end contacts with the bottom surface of the described scale pan when described scale pan load.

2. shock resistance according to claim 1 and overload protection arrangement; it is characterized in that; described device also comprises overload protection assembly; described overload protection assembly comprises the angle bar be all fixedly connected with described sensor and described base and the nut be arranged on described angle bar; when the described scale pan is subject to pulling force upwards and makes described sensor upwards be out of shape and reach setting value, described angle bar contacts with described nut.

3. shock resistance according to claim 1 and 2 and overload protection arrangement, is characterized in that, described spring is provided with adjustable nut.

4. shock resistance according to claim 1 and 2 and overload protection arrangement; it is characterized in that; a pair back up pad that described base comprises base plate and extended upward by described base plate both sides, the upper end of described back up pad contacts with the bottom surface of the described scale pan when described scale pan load.

5. shock resistance according to claim 1 and 2 and overload protection arrangement, is characterized in that, the described scale pan, between sensor and angle bar, and be fixedly connected with by screw between described sensor with described base.