CN211121555U

CN211121555U - Anti-unbalance-loading column type weighing sensor

Info

Publication number: CN211121555U
Application number: CN201921430070.5U
Authority: CN
Inventors: 王辉; 周扬
Original assignee: Ningbo Zhenyu Sensing Technology Co ltd
Current assignee: Ningbo Zhenyu Sensing Technology Co ltd
Priority date: 2019-05-21
Filing date: 2019-08-30
Publication date: 2020-07-28
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses an anti unbalance loading column type weighing sensor, including the elastomer of column type and the base that has the swing hole, the one end of elastomer sets up to circular arc concave sphere for bearing pressure head position and top surface that is used for supporting the steel ball, and the elastomer other end bears the weight of the end and wobbling to be located in the swing hole for supporting the restraint admittedly, and the gland will support the restraint admittedly and bear the weight of the end and inject the setting downthehole at the swing, the beneficial effects of the utility model are that: both ends of the elastic body are arranged to be spherical structures, partial unbalance loading force can be eliminated, and accuracy of weight detection is effectively improved.

Description

Anti-unbalance-loading column type weighing sensor

Technical Field

The utility model relates to an apply to the weighing sensor of truck scale, specific is an anti unbalance loading column type weighing sensor.

Background

Motor scales (also known as loaders) are typically located on the ground to measure the weight of the vehicle and the objects carried thereby. The column sensor is generally arranged below the detection table top and mainly plays a role in measuring force and weighing. In the prior art, when a running vehicle passes through the detection table board, the detection table board generates slight unbalance loading due to uneven gravity distribution, and the accuracy of a detection result is low.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough, the utility model provides an anti unbalance loading column type weighing sensor aims at improving column type sensor's anti unbalance loading performance, guarantees the accuracy of being surveyed vehicle or object weight.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: 1. the utility model provides an anti unbalance loading column type weighing sensor, includes the elastomer of column type, the elastomer is equipped with and meets an emergency the downthehole strainometer that is equipped with of meeting an emergency, its characterized in that: one end of the elastic body comprises a bearing pressure head part for bearing the steel ball, and the top surface of the elastic body is provided with an arc concave spherical surface; the other end of the elastic body is a bearing end, and the end surface of the elastic body is provided with a spherical surface structure; the sensor also comprises a base, wherein a swinging hole is formed in the center of the base, and the bearing end is arranged in the swinging hole in a swinging manner; the sensor also comprises a pressing cover which is arranged in an annular mode, the pressing cover is fixedly connected to the end face of the base, and the bearing end is limited and arranged in the swinging hole; a soft buffer ring is padded between the bearing end and the gland. The two ends of the elastic body are both arranged to be spherical structures, so that unbalance loading of the detection table top can be effectively overcome, and the accuracy of measurement is guaranteed.

In the above technical solution, the unilateral gap between the fixed support restraint bearing end and the swing hole is 0.01-0.03 mm. The offset of the elastic body is controlled within the range, and the phenomenon that the elastic body is turned over due to overlarge offset is prevented.

In the technical scheme, the inner ring of the gland is provided with a limiting step for preventing the solid support restraint bearing end from separating, and the soft buffer ring is arranged between the limiting step and the solid support restraint bearing end. Playing a role of buffering.

In the above technical solution, the spherical structure includes a convex surface disposed on the top surface of the bearing end of the fixed support, and the bottom of the hole of the swing hole is a plane. The fixed support is ensured to restrain the bearing end to swing in the swing hole.

Among the above-mentioned technical scheme, the sensor still includes the casing of fixed connection to base up end, the casing up end is equipped with the casing step, and the plain diaphragm erects on the casing step, casing, plain diaphragm with the holding chamber is injectd jointly to the base. The accommodating cavity is sealed, so that the waterproof and dustproof effects are achieved.

Among the above-mentioned technical scheme, the swing hole circumference has the pore wall, the pore wall is certainly base upper end upwards extends, pore wall circumference is equipped with annular spacing step, the casing is located on the spacing step, the casing welding extremely spacing step. The stability that casing and spacing step are connected has been strengthened.

Among the above-mentioned technical scheme, be provided with a plurality of screws along pore wall circumferencial direction terminal surface, the gland is equipped with the through-hole that the screw corresponds, the fastener passes the through-hole is connected to in the screw. The fixed connection of the gland and the base is ensured, and the disassembly and the assembly are convenient.

Among the above-mentioned technical scheme, the sensor is still including the steel ball protecting cover that has the cambered surface, steel ball protecting cover block is connected to bear pressure head position top, just the cambered surface with bear the top concave surface at pressure head position and construct the rolling arc surface of confession steel ball jointly. The steel ball protecting cover increases the depth of the arc, and effectively prevents the steel ball from falling off in work.

In the technical scheme, a convex ring is arranged on the circumferential surface of the bearing pressure head part, a concave circular groove is formed in the inner side wall of the steel ball protecting cover, and the convex ring is clamped into the concave circular groove. The steel ball protecting cover is detachably connected with the bearing pressure head part.

In the technical scheme, the outer side wall of the shell is fixedly provided with a connector base for the signal cable connector to pass through; the shell body is further provided with a handle, and the handle and the joint seat are arranged oppositely. The connector base is arranged to facilitate the passing of the signal cable connector, and the signal cable connector is connected with the signal bridge circuit of the internal strain gauge.

Compared with the prior art, the beneficial effects of the utility model are that: the both ends of elastomer all set up to spherical structure, when detecting mesa and elastomer out of plumb, the elastomer axle center will produce slight skew along the sphere, and simultaneously, the resultant force of pressure and frictional force that the sphere of elastomer received can be maintained and is basically parallel with the elastomer axis to it is basically the same to maintain the axial ascending strain of each point on the elastomer cross section, and then ensures the accuracy that the precision of weighing guarantees the measurement.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic sectional view of the structure in fig. 2.

Fig. 4 is a schematic diagram of the structure of the elastomer of the present invention.

Fig. 5 is a schematic view of the structure of the middle base of the present invention.

Fig. 6 is a schematic view of the structure of the middle housing of the present invention.

Fig. 7 is a schematic view of the sectional structure of the protecting cover for steel ball of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Referring to fig. 2 and 3, an anti-unbalance-loading column type weighing sensor is mainly arranged below a platform of a truck scale vehicle and plays a role in measuring force and weighing. The elastic body mainly comprises a columnar elastic body 1 (as shown in figure 4), wherein a strain hole 10 is arranged in the elastic body 1, and a strain gauge 11 is arranged in the strain hole 10; a bearing pressure head part 12 is arranged at the upper end of the elastic body 1, the top surface of the bearing pressure head part 12 is arranged into an arc concave spherical surface, a steel ball (not shown in the figure) is arranged on the arc concave spherical surface, and a detection table top is arranged above the steel ball; when the automobile passes through the detection table surface, if the detection table surface is not perpendicular to the elastic body 1 due to uneven gravity distribution, the detection table surface generates unbalance loading, and the steel ball can roll and deviate on the concave surface of the bearing pressure head part 12, so that unbalance loading force is eliminated. For being combined with the bearing pressure head part 12, the other end of the elastic body 1 is a fixed support constraint bearing end 14, and the top surface is set to be a spherical structure; the spherical structure is specifically a convex surface arranged on the top surface of the clamped and restrained bearing end 14. The base 2 is matched with the fixed support constraint bearing end 14 for use, the center of the base 2 is provided with a swinging hole 20, the bottom of the swinging hole 20 is arranged to be a plane, a hole wall 21 extends upwards from the upper end surface of the base 2, and the fixed support constraint bearing end 14 is arranged in the swinging hole 20 in a swinging way so as to eliminate the eccentric load force; in order to ensure that the elastic body 1 is not easy to turn over during the working swing process, an annularly arranged gland 3 is fixedly connected to the upper end surface of the base 2, a limiting step 31 is arranged along the inner ring of the gland 3, and the limiting step 31 can limit the back-and-forth swing amplitude of the fixed support constraint bearing end 14; and a soft buffer ring 4 is arranged between the limit step 31 and the fixed support constraint bearing end 14 in a cushioning manner, and when the elastic body 1 swings, the soft buffer ring 4 can play a role in buffering.

It should be noted that the fitting between the swing hole 20 and the clamped and restrained bearing end 14 is a clearance fitting, and the clearance is small. In the present embodiment, the single-side gap between the bearing end 14 and the swinging hole 20 is 0.01-0.03 mm. The offset of the elastic body 1 is controlled within the range, and the phenomenon that the elastic body 1 turns over due to overlarge offset is prevented. More preferably, the single-sided gap is controlled to be 0.015-0.025 mm.

Referring to fig. 2, 3 and 5, the pressing cover 3 is fixedly connected with the base 2 through threads, a plurality of screw holes 23 are uniformly distributed on the circumferential end surface of the base 2, the pressing cover 3 is provided with through holes 30 corresponding to the screw holes 23, and fasteners (such as screws, bolts and the like) penetrate through the through holes 30 and are connected into the screw holes 23, so that the base 2 and the pressing cover 3 can be detachably connected.

With reference to fig. 1, 2 and 6, in the present embodiment, the hole wall 21 is provided with a mounting step 22 in the circumferential direction; the sensor also comprises a shell 5 and a flat diaphragm 6, wherein the shell 5 is of a cylindrical structure, and the shell 5 is located on the mounting step 22; in order to ensure the stability of connection, the shell 5 is fixedly connected with the mounting step 22 by welding; 5 upper ends of casing are equipped with casing step 50, and flat diaphragm 6 is located on casing step 50, and flat diaphragm 6 keeps the laminating with elastomer 1, under the combined action of flat diaphragm 6, casing 5 and base 2, prescribes a limit to waterproof dirt-proof holding chamber, and elastomer 1 then settles at this holding intracavity, and waterproof dirt-proof can prolong its life.

Referring to fig. 1 and 7, in order to prevent the steel ball (not shown) supported by the bearing pressure head portion 12 from falling off, a steel ball protecting cover 7 is further provided in cooperation with the bearing pressure head portion 12, and the center of the steel ball protecting cover 7 has an arc surface 70 matched with the concave surface of the bearing pressure head portion 12, so that the technical defect of preventing the steel ball from falling off is achieved. In this embodiment, the steel ball protecting cover 7 is fixedly connected to the pressure head bearing portion 12 by a snap-fit manner, which is as follows: the circumference of the bearing pressure head part 12 is provided with a convex ring 13, the inner side wall of the steel ball protecting cover 7 is provided with a concave circular groove 71, the steel ball protecting cover 7 can be clamped and connected into the convex ring 13 of the bearing pressure head part 12 through the concave circular groove 71, and the relative position of the steel ball is limited together with the bearing pressure head part 12.

Preferably, a connector base 51 for a signal cable connector to pass through is further provided on the outer side wall of the housing 5, and the signal cable connector is connected with the signal bridge circuit of the strain gauge 11, so as to realize the measurement signal output of the strain gauge 11. The outer side wall of the shell 5 is also provided with a handle 52, so that the whole sensor is convenient to carry and take. The adapter 51 is disposed opposite to the handle 52 for aesthetic reasons, and the symmetry is enhanced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an anti unbalance loading column type weighing sensor, includes elastomer (1) of column type, elastomer (1) are equipped with and strain hole (10) be equipped with strainometer (11), its characterized in that in straining hole (10): one end of the elastic body (1) comprises a bearing pressure head part (12) for bearing a steel ball, and the top surface of the elastic body is an arc concave spherical surface; the other end of the elastic body (1) is a fixed support constraint bearing end (14) and the end surface of the elastic body has a spherical structure; the sensor also comprises a base (2), wherein a swinging hole (20) is formed in the center of the base (2), and the fixed support constraint bearing end (14) is arranged in the swinging hole (20) in a swinging mode; the sensor also comprises an annularly arranged gland (3), the gland (3) is fixedly connected to the end face of the base (2) and limits and arranges the fixed support constraint bearing end (14) in the swinging hole (20); a soft buffer ring (4) is padded between the fixed support constraint bearing end (14) and the gland (3).

2. The anti-offset column type weighing sensor of claim 1, wherein: the unilateral clearance between the fixed support restraining bearing end (14) and the swinging hole (20) is 0.01-0.03 mm.

3. The anti-offset column type weighing sensor of claim 1, wherein: the inner ring of the gland (3) is provided with a limiting step (31) for preventing the solid support restraint bearing end (14) from being separated, and the soft buffer ring (4) is arranged between the limiting step (31) and the solid support restraint bearing end (14) in a cushioning mode.

4. An anti-offset column load cell as defined in claim 3, wherein: the spherical structure comprises a convex surface arranged on the top surface of the fixed support constraint bearing end (14), and the bottom of the swinging hole (20) is a plane.

5. An anti-offset column load cell as defined in claim 4, wherein: the sensor further comprises a shell (5) fixedly connected to the upper end face of the base (2), a shell step (50) is arranged on the upper end face of the shell (5), the flat diaphragm (6) is erected on the shell step (50), and the shell (5), the flat diaphragm (6) and the base (2) define a containing cavity together.

6. An anti-offset column load cell as defined in claim 5, wherein: swing hole (20) circumference has pore wall (21), pore wall (21) certainly base (2) up end upwards extends, pore wall (21) circumference is equipped with annular arrangement step (22), casing (5) are located on spacing step (31), casing (5) weld extremely arrangement step (22).

7. An anti-offset column load cell as defined in claim 6, wherein: a plurality of screw holes (23) are formed in the end face of the circumferential direction of the hole wall (21), through holes (30) corresponding to the screw holes (23) are formed in the gland (3), and fasteners penetrate through the through holes (30) and are connected into the screw holes (23).

8. An anti-offset column load cell according to any one of claims 5 to 7, wherein: the sensor is still including steel ball protecting cover (7) that has cambered surface (70), steel ball protecting cover (7) block is connected to and bears pressure head position (12) top, just cambered surface (70) with bear pressure head position (12) top concave surface and construct the rolling arc surface of confession steel ball jointly.

9. An anti-offset column load cell as defined in claim 8, wherein: a convex ring (13) is arranged on the circumferential surface of the bearing pressure head part (12), a concave circular groove (71) is formed in the inner side wall of the steel ball protecting cover (7), and the convex ring (13) is clamped into the concave circular groove (71).

10. An anti-offset column load cell as defined in claim 9, wherein: a connector seat (51) for a signal cable connector to pass through is fixedly arranged on the outer side wall of the shell (5); the outer side wall of the shell (5) is further fixedly provided with a handle (52), and the handle (52) and the joint seat (51) are arranged oppositely.