CN201731925U

CN201731925U - Weighing sensor

Info

Publication number: CN201731925U
Application number: CN2009202634966U
Authority: CN
Inventors: 冯永光
Original assignee: Guangdong Nanfang Weighing Apparatus Factory Co Ltd
Current assignee: Guangdong Nanfang Weighing Apparatus Factory Co Ltd
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2011-02-02
Anticipated expiration: 2019-11-27

Abstract

The utility model relates to a weighing sensor, which comprises a pressure-bearing top cover (a), an elastomer (b) and a supporting base (c), wherein the elastomer (b) comprises a load import part (b1), a strain part (b2) and a load support part (b3); the middle parts of the front surface and the rear surface of the strain part (b2) are provided with strain holes (1 and 2); a digital board (14) and an analog board (15) are respectively arranged in the front and rear strain holes (1 and 2); four symmetrically distributed first, second, third and fourth deformation through holes (5,6,7 and 8) are arranged around the digital board (14) and the analog board (15); and the cross section of the central shaft of each deformation through hole is provided with first, second, third and fourth deformation notches (9,10,11 and 12) which are communicated with the outside. The utility model has the advantages of convenient installation, low sensitivity to the mounting precision including the verticality, the rotation angle variation and the levelness of upper and lower bases and high weighing precision.

Description

A kind of LOAD CELLS

Technical field

The utility model relates to a kind of LOAD CELLS, belongs to the electronic scale technical field.

Technical background

In the industry and commerce field, along with improving constantly of production efficiency, people are more extensive to the application of electronic scale, also more and more higher to the use cost and the accuracy requirement of weighing, the pillar LOAD CELLS is a kind of function element of utilizing the metallic elastic body power to be converted to strain, this column type sensor is because its compact conformation, geometric configuration is simple, rigidity is bigger, be most widely used, but mostly there are following shortcomings in existing pillar LOAD CELLS: be exactly that it is very high to the installation accuracy requirement, comprise the installation verticality, corner change degree, the levelness of Up/down base etc. all needs strict tolerance and guarantees; Measuring error is bigger when being subjected to side force load and eccentric load simultaneously, therefore causes its measuring accuracy low.

The utility model content

The technical problems to be solved in the utility model is that a kind of LOAD CELLS that susceptibility is low, weighing precision is high of being convenient to install and installation accuracy is comprised the levelness of verticality, corner change degree, Up/down base is provided.

This addresses the above problem, a kind of LOAD CELLS of the present utility model, include the pressure-bearing top cover, elastic body and support plinth, its main body of described elastic body is a rectangular structure, including load imports partly, strain part and load support are partly, before strain partly, before the middle part, back is provided with, back strain bore, before, back strain bore is two coaxial isometrical circular blind holes, the bottom of strain bore is the elasticity sensitizing range, preceding, be provided with before four around the back strain bore, back strain bore axis is that present at the center, down, a left side, first of right symmetrical distribution, second, the 3rd, the 4th distortion through hole, on the xsect of each distortion through hole central shaft, be respectively equipped with outside be communicated with first, second, the 3rd, the 4th deformation notches; Between the first, the 3rd deformation notches in forward and backward strain bore left side, have respectively and the left flexural deformation side plate that load imports partly and load support partly is connected, between the second, the 4th deformation notches on forward and backward strain bore right side, have respectively and load imports partly and load support partly is connected right flexural deformation side plate.

On described elasticity sensitizing range, be provided with the wire through-hole of the forward and backward strain bore of conducting.

Before described strain bore or strain bore side, back be provided with outside the cable through hole that is communicated with.

In described forward and backward strain bore, be respectively equipped with digital board and analog board, the lead that connects digital board and analog board passes described wire through-hole and cable through hole and with the sealing adaptor sealing and be fixed on the elastomeric side, the port of forward and backward strain bore is fixed with gland bonnet and sealed.

It is stacked cylindrical structure that described load imports top partly, and its end face is a sphere, and the radius of this sphere is not less than elastomeric height.

Described load support bottom partly is two to save stacked cylindrical structure up and down, forms a bulge loop on the side face of last pitch circle cylinder lower end, and have stopper slot on the right cylinder side face; The bottom surface of following pitch circle cylinder is a sphere, and the radius of this sphere is not less than elastomeric height.

On the bulge loop lower plane of pitch block end of body on the described load support part, having compressed dustproof anti-native packing ring.

Described pressure-bearing top cover lower surface is provided with load and imports the groove that matches in end partly, and groove bottom is the plane; Around groove, be provided with fixed orifice.

Described support plinth upper surface is provided with the groove that matches with load support end partly, and groove bottom is the plane; On the side face of groove, be provided with the limit pin hole that matches with the stopper slot of load support part end, and on limit pin hole and stopper slot, be provided with spacer pin; Around groove, be provided with fixed orifice.

Adopt a kind of LOAD CELLS of the present utility model, have the advantage that susceptibility is low, weighing precision is high of being convenient to install and installation accuracy is comprised the levelness of verticality, corner change degree, Up/down base.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 looks partial sectional view for a left side of the present utility model.

Fig. 3 is an explosive view of the present utility model.

Embodiment

As Fig. 1～shown in Figure 3, a kind of LOAD CELLS of the present utility model, include pressure-bearing top cover a, elastic body b and support plinth c, described its main body of elastic body b is a rectangular structure, include load and import partly b1, strain is b2 and load support part b3 partly, before strain part b2, before the middle part, back is provided with, back strain bore 1,2, before, back strain bore 1,2 is two coaxial isometrical circular blind holes, its bottom is elasticity sensitizing range 3, before on elasticity sensitizing range 3, being provided with conducting, back strain bore 1,2 wire through-hole 4, preceding, back strain bore 1, be provided with before four around 2, back strain bore 1,2 axis are that present at the center, down, a left side, first of right symmetrical distribution, second, the 3rd, the 4th distortion through

hole

5,6,7,8, on the xsect of each distortion through hole central shaft, be respectively equipped with outside be communicated with first, second, the 3rd, the

4th deformation notches

9,10,11,12; Between the first, the 3rd deformation notches 9,11 in forward and backward strain bore 1,2 left sides, have respectively with load and import the partly left flexural deformation side plate that is connected of c of partly a and load support, between the second, the 4th deformation notches 10,12 on forward and backward strain bore 1,2 right sides, have respectively with load and import the right flexural deformation side plate that a partly is connected with load support part c.

Before described strain bore 1 or strain bore 2 sides, back be provided with outside the cable through hole 13 that is communicated with.

In described forward and backward strain bore 1,2, be respectively equipped with digital board 14 and analog board 15, the lead 16 of connection digital board 14 and analog board 15 passes described wire through-hole 4 and cable through hole 13 also seals and is fixed on the side of elastic body b with sealing adaptor 17, and the port of forward and backward strain bore 1,2 is fixed with gland bonnet 18 and sealed.

The top that described load imports part b1 is stacked cylindrical structure, and its end face 19 is a sphere, and the radius of this sphere is not less than elastomeric height.

The described load support partly bottom of b3 is two to save stacked cylindrical structure up and down, forms a bulge loop 21 on the side face of the lower end of last pitch circle cylinder, and have stopper slot 22 on cylindrical side face; The bottom surface 20 of following pitch circle cylinder is a sphere, and the radius of this sphere is not less than elastomeric height.

On bulge loop 21 lower planes of pitch block end of body on the described load support part b3, having compressed dustproof anti-native packing ring 29.

Described pressure-bearing top cover a lower surface is provided with the groove 23 that matches with the end of load importing part b1, and groove bottom is the plane; Around groove 23, be provided with fixed orifice 24.

Described support plinth c upper surface is provided with the groove 25 that matches with the end of load support part b3, and groove bottom is the plane; On the side face of groove 25, be provided with the limit pin hole 26 that matches with the stopper slot 22 of load support part b3 end, and on limit pin hole 26 and stopper slot 22, be provided with spacer pin 27; Around groove 25, be provided with fixed orifice 28.

Claims

1. LOAD CELLS, include pressure-bearing top cover (a), elastic body (b) and support plinth (c), it is characterized in that: described elastic body (b) includes load and imports partly (b1), strain is (b2) and load support part (b3) partly, preceding in strain part (b2), before the middle part, back is provided with, back strain bore (1,2), before, back strain bore (1,2) be two coaxial isometrical circular blind holes, its bottom is elasticity sensitizing range (3), preceding, back strain bore (1,2) be provided with before four around, back strain bore (1,2) axis is that present at the center, down, a left side, first of right symmetrical distribution, second, the 3rd, the 4th distortion through hole (5,6,7,8), on the xsect of each distortion through hole central shaft, be respectively equipped with outside be communicated with first, second, the 3rd, the 4th deformation notches (9,10,11,12); Between the first, the 3rd deformation notches (9,11) in forward and backward strain bore (1,2) left side, have respectively with load and import partly (c) left flexural deformation side plate of being connected of partly (a) and load support, between the second, the 4th deformation notches (10,12) on forward and backward strain bore (1,2) right side, have respectively and import the right flexural deformation side plate that part (a) is connected with load support part (c) with load.

2. a kind of LOAD CELLS according to claim 1 is characterized in that: the wire through-hole (4) that is provided with the forward and backward strain bore of conducting (1,2) on described elasticity sensitizing range (3); Strain bore before described (1) or strain bore (2) side, back be provided with outside the cable through hole (13) that is communicated with.

3. a kind of LOAD CELLS according to claim 2, it is characterized in that: in described forward and backward strain bore (1,2), be respectively equipped with digital board (14) and analog board (15), the lead (16) of connection digital board (14) and analog board (15) passes described wire through-hole (4) and cable through hole (13) and seals and be fixed on the side of elastic body (b) with sealing adaptor (17), and the port of forward and backward strain bore (1,2) is fixing and sealing with gland bonnet (18).

4. a kind of LOAD CELLS according to claim 1 is characterized in that: the top that described load imports part (b1) is stacked cylindrical structure, and its end face (19) is a sphere, and the radius of this sphere is not less than elastomeric height.

5. a kind of LOAD CELLS according to claim 1, it is characterized in that: the described load support partly bottom of (b3) is two to save stacked cylindrical structure up and down, on the side face of last pitch circle cylinder lower end, form a bulge loop (21), on cylindrical side face, have stopper slot (22); The bottom surface of following pitch circle cylinder (20) is a sphere, and the radius of this sphere is not less than elastomeric height.

6. a kind of LOAD CELLS according to claim 5 is characterized in that: on the lower plane of the bulge loop (21) of pitch block end of body on the described load support part (b3), having compressed dustproof anti-native packing ring (29).

7. a kind of LOAD CELLS according to claim 1 is characterized in that: described pressure-bearing top cover (a) lower surface is provided with the groove (23) that matches with the end of load importing part (b1), and groove bottom is the plane; Around groove (23), be provided with fixed orifice (24).

8. a kind of LOAD CELLS according to claim 1 is characterized in that: described support plinth (c) upper surface is provided with the groove (25) that matches with the end of load support part (b3), and groove bottom is the plane; On the side face of groove (25), be provided with the limit pin hole (26) that matches with the stopper slot (22) of load support part (b3) end, and on limit pin hole (26) and stopper slot (22), be provided with spacer pin (27); Around groove (25), be provided with fixed orifice (28).