A connected hole column type weighing sensor

Abstract

The utility model discloses a kind of integrated hole column type weighing sensors, including pressure head assembly and base;Base, the base is used to fixedly connected on force bearing base;Pressure head assembly, the pressure head assembly is connected with weighing scale platform;Elastomer, the elastomer is arranged between the base and the pressure head assembly, is hole column type structure strain body, is the core component of weighing sensor and realizes weighing function;Protective piece, the protective piece is set on the elastomer, and plays the role of protection;The utility model pressure head assembly concentrates the parallel force transmitted by weighing scale platform to elastomer, and allows the small range movement of weighing scale platform and the small-angle inclination of force bearing base, to improve the lateral force measurement accuracy of sensor.Pressure head assembly is connected with elastomer, base, protective piece, without additional accessories, reach use requirement, it is convenient to install and maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to weighing sensor technical field, concretely is a kind of conjoined hole column type weighing sensor. BACKGROUND

[0002] Weighing sensor is actually a kind of quality signal conversion measurable electrical signal output device. With sensor, the actual working environment of sensor should be considered first, this is crucial to correct selection of weighing sensor, it is related to the normal work of sensor and its safety and service life, even the reliability and safety of entire weighing apparatus. On the basic concept and evaluation method of the main technical indexes of weighing sensor, there is qualitative difference between new and old national standards. There are several styles, such as S type, cantilever type, wheel spoke type, plate ring type, diaphragm type, bridge type and column type.

[0003] Column type weighing sensor is widely used in the field of truck scale, in existing conventional technology, the stability of weighing sensor installation is poor, which will affect the accuracy of measurement;For example, the prior art "CN219842060U a mounting structure of column type weighing sensor" includes chassis, the top of the chassis is fixedly connected with fixed rod, the fixed rod top penetrates the top of fixed plate, the fixed rod is effectively prevented from overturning during use, the chassis is first fixed at the bottom, and the whole is stably reinforced by using screws through the internal screw holes of angle iron. It belongs to external limiting structure added to weighing sensor, and the demand for external accessories is high, which is not convenient to install and maintain. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of conjoined hole column type weighing sensor to solve the problems of low measurement accuracy and complex external accessory structure and inconvenient installation and maintenance in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of conjoined hole column type weighing sensor, including pressure head assembly and base;

[0006] The base is used to be fixedly connected on force-bearing foundation;

[0007] Pressure head assembly, the pressure head assembly is connected with weighing scale table;

[0008] Elastomer, the elastomer is arranged between the base and the pressure head assembly, is the core component for realizing weighing function of weighing sensor, and is hole column type structure strain body;

[0009] Protective piece, the protective piece is arranged on the elastomer, and plays a protective role.

[0010] Preferably, the pressure head assembly comprises a pressure head, a pressure head column and a positioning sleeve, the lower end of the pressure head is in contact with the upper end of the pressure head column, the lower end of the pressure head column is in contact with the upper end of the elastic body, the outer side of the pressure head column is sleeved with the positioning sleeve, and the pressure head column is connected with the elastic body through the positioning sleeve.

[0011] Preferably, the top of the pressure head column is provided with an outer convex spherical surface A, the bottom of the pressure head is provided with a cylindrical hole, the inner side of the cylindrical hole is a pressure head plane A, the pressure head plane A is matched with the outer convex spherical surface A, the edge of the outer convex spherical surface A is provided with a pressure head plane B, the pressure head plane B is matched with the inner wall of the cylindrical hole, the top of the outer side of the pressure head column is provided with an outer diameter circular groove, the bottom of the outer side of the pressure head is provided with a plurality of threaded holes, the inside of the threaded holes is provided with a screw, the screw extends to the inside of the outer diameter circular groove, and the screw connects the pressure head and the pressure head column and limits the axial movement.

[0012] Preferably, the top end of the elastic body is provided with an outer convex spherical surface B, the bottom end of the pressure head column is provided with an inner concave spherical surface, the outer convex spherical surface B is matched with the inner concave spherical surface and constitutes an outward stress point.

[0013] The inside of the positioning sleeve is provided with an internal thread, the top of the outer wall of the elastic body is provided with an external thread, and the positioning sleeve is threadedly connected with the elastic body, so that the pressure head column swings in all directions within a certain range without tilting.

[0014] The top end of the inside of the positioning sleeve is provided with a first inner cylindrical surface, the bottom of the outer side of the pressure head column is provided with a circular annular surface, and the size of the circular annular surface is greater than that of the first inner cylindrical surface, the middle of the inner wall of the positioning sleeve is provided with a second inner cylindrical surface, and the size of the second inner cylindrical surface is greater than that of the first inner cylindrical surface, and the second inner cylindrical surface is matched with the circular annular surface in a clearance fit.

[0015] Preferably, the outer side of the positioning sleeve is provided with a group of internal threaded holes, and a pointed set screw is threadedly connected in the internal threaded holes.

[0016] Preferably, the base comprises an annular plate and two groups of anti-disengagement rings, the anti-disengagement rings are half-circular ring structures, the bottom of the outer side of the elastic body is provided with an annular groove, the annular groove is circumferentially matched with the two groups of anti-disengagement rings, the inner wall of the annular plate is welded with the two groups of anti-disengagement rings, and the two groups of anti-disengagement rings are welded with the annular groove.

[0017] Preferably, the protective member comprises a shell and a diaphragm, two sides of the outer part of the elastic body are symmetrically provided with stepped cylindrical holes, the stepped cylindrical holes comprise annular steps, the diaphragm is arranged in the annular steps, the diaphragm is welded and connected with the annular steps, and the shell is sleeved on the outer part of the elastic body.

[0018] Compared with the prior art, the beneficial effects of the utility model are that the pressure head assembly in the conjoined hole column type weighing sensor concentrates the parallel force transmitted from the weighing platform on the elastic body, and allows small-range movement of the weighing platform and small-angle inclination of the force-bearing foundation, thereby improving the lateral force measurement accuracy of the sensor; the pressure head assembly is integrated with the elastic body, the base and the protection piece, no additional accessories are needed, the use requirements are met, and installation and maintenance are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a perspective view of the utility model;

[0020] Fig. 2 It is a front view of the utility model;

[0021] Fig. 3 It is a structural schematic view of the utility model.

[0022] In the drawing: 10, pressure head assembly; 11, pressure head; 111, cylindrical hole; 112, pressure head plane A; 113, threaded hole; 114, screw; 12, pressure head column; 121, outer convex spherical surface A; 122, pressure head plane B; 123, outer diameter circular groove; 124, inner concave spherical surface; 125, annular surface; 13, positioning sleeve; 131, first inner cylindrical surface; 132, second inner cylindrical surface; 133, inner threaded hole;

[0023] 20, elastic body; 201, outer convex spherical surface B; 202, annular groove;

[0024] 30, base; 31, annular plate; 32, anti-dropping ring;

[0025] 40, protection piece; 41, shell; 42, diaphragm. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Please refer to Figs. 1-3 The utility model provides an embodiment: a conjoined hole column type weighing sensor, which comprises a pressure head assembly 10 and a base 30.

[0028] The base 30 is used for being fixedly connected on the force-bearing foundation.

[0029] The pressure head assembly 10 is connected with the weighing platform.

[0030] The elastic body 20 is disposed between the base 30 and the pressure head assembly 10. It is a perforated column structure strainer and is the core component of the load cell to realize the weighing function. The pressure head assembly 10 and the elastic body 20 always form a self-righting structure.

[0031] Protective component 40 is disposed on elastomer 20 and serves a protective function.

[0032] The pressure head assembly 10 includes a pressure head 11, a pressure head column 12, and a positioning sleeve 13. The lower end of the pressure head 11 is in contact with the upper end of the pressure head column 12, and the lower end of the pressure head column 12 is in contact with the upper end of the elastic body 20. The positioning sleeve 13 is sleeved on the outer side of the pressure head column 12, and the pressure head column 12 is connected to the elastic body 20 through the positioning sleeve 13.

[0033] The top of the pressure head column 12 is provided with an outwardly convex spherical surface A121, and the bottom of the pressure head 11 is provided with a cylindrical hole 111. The inner side of the cylindrical hole 111 is the pressure head plane A112, which is adapted to the outwardly convex spherical surface A121. The edge of the outwardly convex spherical surface A121 is provided with a pressure head plane B122, which is clearance-fitted with the inner wall of the cylindrical hole 111. The top of the outer side of the pressure head column 12 is provided with an outer diameter groove 123, and the bottom of the outer side of the pressure head 11 is provided with multiple sets of threaded holes 113. Screws 114 are provided inside the threaded holes 113, and the screws 114 extend into the inner side of the outer diameter groove 123. The screws 114 connect the pressure head 11 and the pressure head column 12 and restrict axial movement.

[0034] The top end of the elastomer 20 is provided with an outwardly convex spherical surface B201, and the bottom end of the pressure head column 12 is provided with an inwardly concave spherical surface 124. The outwardly convex spherical surface B201 and the inwardly concave spherical surface 124 are in contact and fit together to form an outwardly stressed point.

[0035] The positioning sleeve 13 has an internal thread, and the top of the outer wall of the elastic body 20 has an external thread. The positioning sleeve 13 is threadedly connected to the elastic body 20.

[0036] The top of the positioning sleeve 13 is provided with a first inner cylindrical surface 131, the bottom of the outer side of the pressure head 12 is provided with an annular surface 125, and the size of the annular surface 125 is larger than that of the first inner cylindrical surface 131. The middle of the inner wall of the positioning sleeve 13 is provided with a second inner cylindrical surface 132, and the size of the second inner cylindrical surface 132 is larger than that of the first inner cylindrical surface 131. The second inner cylindrical surface 132 and the annular surface 125 are in clearance fit.

[0037] Furthermore, the outer side of the positioning sleeve 13 is provided with a set of internal threaded holes 133, and the internal threads of the internal threaded holes 133 are connected to a pointed set screw, which is used to fix and prevent loosening.

[0038] Further, the base 30 comprises an annular plate 31 and two sets of anti-falling rings 32, the anti-falling rings 32 are semi-circular ring structures, the bottom of the outer side of the elastic body 20 is provided with an annular groove 202, the annular groove 202 is circumferentially matched with the two sets of anti-falling rings 32, the inner wall of the annular plate 31 is welded with the two sets of anti-falling rings 32, the two sets of anti-falling rings 32 are welded with the annular groove 202, the annular plate 31 and the elastic body 20 are connected by the anti-falling rings 32 to form an anti-rollover enhanced base; the lower plane of the elastic body 20 is welded with the annular plate 31, and the elastic body 20 is made as a main stress surface after being processed on the bottom surface, and the edge of the annular plate ensures the anti-rollover function.

[0039] Further, the protective piece 40 comprises an outer shell 41 and a diaphragm 42, two sides of the outer side of the elastic body 20 are symmetrically provided with stepped cylindrical holes, and the stepped cylindrical holes comprise annular steps, and the diaphragm 42 is arranged in the annular step, the diaphragm 42 is welded and connected with the annular step, and the outer shell 41 is sleeved outside the elastic body 20, and the outer shell 41 protects the sealing diaphragm 42 of the sensor elastic body 20 from being damaged by external force collision through the buckle mounting mode, and the overall appearance effect of the sensor is improved.

[0040] Working principle: firstly, the bottom of the load cell is connected with the anti-falling rings 32 through the annular plate 31 by welding from top to bottom, so that the lower plane of the elastic body 20 and the annular plate 31 form an enhanced anti-pressure base, so as to ensure the stability of the load cell; the middle part of the load cell is protected by the outer shell 41 to prevent the elastic body 20 and the diaphragm 42 thereon from being damaged by external force collision, and the overall appearance effect of the sensor is improved; the positioning sleeve 13 is threadedly connected with the top of the elastic body 20, the pressure head column 12 and the elastic body 20 are connected together through the positioning sleeve 13, the position of the pressure head 11 is limited and locked by the screw 114 extending into the outer diameter circular groove 123 in the threaded hole 113, so as to connect the pressure head 11 and the pressure head column 12; the pressure head assembly 10 is connected with the elastic body 20, the base 30 and the protective piece 40, without additional accessories, so as to meet the use requirements, facilitate installation and maintenance.

[0041] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0042] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A connected hole column load cell, comprising a pressure head assembly (10) and a base (30), characterized in that: the base (30) is used for fixed connection on the force bearing foundation; the pressure head assembly (10) is connected with the load scale table; the elastic body (20) is arranged between the base (30) and the pressure head assembly (10), and is a hole column structure strain body; the protection piece (40) is arranged on the elastic body (20).

2. The one-piece hole column load cell of claim 1, wherein: The pressure head assembly (10) comprises a pressure head (11), a pressure head column (12) and a positioning sleeve (13), the lower end of the pressure head (11) is in contact with the upper end of the pressure head column (12), the lower end of the pressure head column (12) is in contact with the upper end of the elastic body (20), the outer side of the pressure head column (12) is sleeved with the positioning sleeve (13), and the pressure head column (12) is connected with the elastic body (20) through the positioning sleeve (13).

3. The one-piece hole column load cell of claim 2, wherein: The top of the pressure head column (12) is provided with an outer convex spherical surface A (121), the bottom of the pressure head (11) is provided with a cylindrical hole (111), the inner side of the cylindrical hole (111) is a pressure head plane A (112), the pressure head plane A (112) is matched with the outer convex spherical surface A (121), the edge of the outer convex spherical surface A (121) is provided with a pressure head plane B (122), the pressure head plane B (122) is gap matched with the inner wall of the cylindrical hole (111), the top of the outer side of the pressure head column (12) is provided with an outer diameter circular groove (123), the bottom of the outer side of the pressure head (11) is provided with a plurality of threaded holes (113), the inside of the threaded holes (113) is provided with screws (114), the screws (114) extend into the inside of the outer diameter circular groove (123), and the screws (114) connect the pressure head (11) and the pressure head column (12) and limit the axial movement.

4. A monolithic hole column load cell according to claim 2 or 3, wherein: The top end of the elastic body (20) is provided with an outer convex spherical surface B (201), the bottom end of the pressure head column (12) is provided with an inner concave spherical surface (124), the outer convex spherical surface B (201) is in contact with the inner concave spherical surface (124) and forms an outward stress point; The inside of the positioning sleeve (13) is provided with an inner thread, the top of the outer wall of the elastic body (20) is provided with an outer thread, and the positioning sleeve (13) is threadedly connected with the elastic body (20); The top end of the inside of the positioning sleeve (13) is provided with a first inner cylindrical surface (131), the bottom of the outer side of the pressure head column (12) is provided with an annular surface (125), and the size of the annular surface (125) is greater than that of the first inner cylindrical surface (131), the middle of the inner wall of the positioning sleeve (13) is provided with a second inner cylindrical surface (132), and the size of the second inner cylindrical surface (132) is greater than that of the first inner cylindrical surface (131), and the second inner cylindrical surface (132) is gap matched with the annular surface (125).

5. The one-piece hole column load cell of claim 2, wherein: The outer side of the positioning sleeve (13) is provided with a group of inner threaded holes (133), and a pointed set screw is threadedly connected in the inner threaded holes (133).

6. The one-piece hole column load cell of claim 1, wherein: The base (30) comprises an annular plate (31) and two groups of anti-off rings (32), the anti-off rings (32) are semi-circular ring structures, the bottom of the outer side of the elastic body (20) is provided with an annular groove (202), the annular groove (202) is circumferentially matched with the two groups of anti-off rings (32), the inner wall of the annular plate (31) is welded with the two groups of anti-off rings (32), and the two groups of anti-off rings (32) are welded with the annular groove (202).

7. The one-piece hole column load cell of claim 1, wherein: The protective piece (40) comprises an outer shell (41) and a diaphragm (42), two sides of the outer side of the elastic body (20) are symmetrically provided with stepped cylindrical holes, the stepped cylindrical holes comprise annular steps, the diaphragm (42) is arranged in the annular steps, the diaphragm (42) is welded and connected with the annular steps, and the outer shell (41) is sleeved outside the elastic body (20).

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