CN219244775U - High-precision electronic scale with overload protection function - Google Patents

Abstract

The utility model discloses a high-precision electronic scale with an overload protection function, which comprises a display screen, a bearing plate, a weighing module and an overload protection module, wherein the weighing module comprises a lower connecting plate, a base arranged on the lower connecting plate and a column type sensor arranged on the base, a connecting bracket is arranged on the lower connecting plate, the side surface of the upper end of the column type sensor is arranged on the connecting bracket, a damping elastic piece is arranged between the connecting bracket and the column type sensor, a spherical guide groove is arranged in the base, an upper pressure head is arranged at the upper end part of the column type sensor, and the lower end of the column type sensor is arranged in the guide groove; the overload protection module adopts a supporting structure arranged on the side surface of the weighing module. The electronic scale has the advantages of having a reliable overload protection function, having low requirements on the placement levelness of the electronic scale, reducing the requirements on the placement position of the electronic scale and ensuring the high measurement precision of the electronic scale.

Description

High-precision electronic scale with overload protection function

Technical Field

The application relates to the technical field of electronic scales, in particular to a high-precision electronic scale with an overload protection function.

Background

The electronic scale is used for measuring the weight of an object and mainly comprises a bearing system (such as a scale pan and a scale body), a force transmission conversion system (such as a lever force transmission system and a sensor) and a value indicating system (such as a dial and an electronic display instrument). The existing electronic scale is easy to cause damage to the electronic scale when articles with excessive weight are placed, and the situation that the electronic scale is laterally turned over to cause damage to the electronic scale and the articles cannot be avoided.

In chinese patent literature, patent number CN201921792889.6 authorizes and announces an electronic scale that can prevent overload in 2020's 6 month 2 days, including shell, gravity sensing ring and touch-control display screen, the top cap is installed to the top of shell, and installs the buckle in the edge of top cap bottom to the up end of top cap is provided with the slotted hole, the top of slotted hole is provided with the tray, and the lower terminal surface of tray is fixed with the bracing piece, and the bracing piece runs through in the slotted hole, the gravity sensing ring sets up the bottom at the shell inboard, be provided with the go-between in the stand, and the limit side of go-between installs the gyro wheel, be provided with the track groove on the inner wall of stand, be connected with the spring between the bottom of go-between and the top of gravity sensing ring, power and touch-control display screen are installed respectively to the bottom and the limit side of shell. The overload prevention is controlled through the lifting stroke of the support rod, but the whole sliding stroke is overlong, and the electronic scale is easy to cheat due to the fact that the overlong sliding stroke enables a high requirement on the placement position of the electronic scale and high requirement on the horizontality of the electronic scale, and once the electronic scale is obliquely placed, the accuracy of the indication of the electronic scale is lost, and the measurement accuracy of the electronic scale is also affected.

Disclosure of Invention

Based on the defects in the prior art, the utility model provides the high-precision electronic scale with the overload protection function, which has the reliable overload protection function, has low requirements on the placement levelness of the electronic scale, reduces the requirements on the placement position of the electronic scale, and ensures the measurement high precision of the electronic scale.

In order to achieve the above object, the present application adopts the following technical solutions.

The high-precision electronic scale with the overload protection function comprises a display screen and a bearing plate, and is characterized by further comprising a weighing module and an overload protection module, wherein the weighing module comprises a lower connecting plate, a base arranged on the lower connecting plate and a column type sensor arranged on the base, a connecting bracket is arranged on the lower connecting plate, the side surface of the upper end of the column type sensor is arranged on the connecting bracket, a damping elastic piece is arranged between the connecting bracket and the column type sensor, a spherical guide groove is arranged in the base, an upper pressure head is arranged at the upper end of the column type sensor, and the lower end of the column type sensor is arranged in the guide groove; the overload protection module adopts a supporting structure arranged on the side surface of the weighing module.

The spherical structure of the guide groove realizes the arc surface support of the lower end of the column type sensor, when the electronic scale is placed in a non-horizontal state to generate slight inclination, the lower end of the column type sensor can slightly incline along with the guide groove, and the upper end of the column type sensor is also positioned at a position with certain elasticity because of being matched with the damping elastic piece, so that the column type sensor can be prevented from being directly clamped, the measurement result of the column type sensor still has higher reliability and reliable measurement precision; the overload protection module is matched with the weighing module, and when the column type sensor receives pressure above the measuring range, the overload protection module supports the bearing plate, so that overload protection of the weighing module is realized.

Preferably, the bottom center position of the guide groove is provided with an upward convex spherical positioning seat. The spherical positioning seat is used for being matched with the lower end of the column type sensor, providing a spherical support and being matched with the spherical guide groove, realizing reliable support when the lower end of the column type sensor is inclined, and ensuring the measurement accuracy of the electronic scale.

Preferably, the connecting bracket comprises two opposite vertical plates, the cross section of each vertical plate is arc-shaped, the two vertical plates are positioned on the same virtual circle, the upper ends of the two vertical plates are provided with mounting plates, positioning round holes are formed in the mounting plates, and the damping elastic pieces are arranged in the positioning round holes. The setting of damping elastic component is realized to riser cooperation mounting panel, realizes the reliable sliding support of column type sensor upper end, guarantees the stability that column type sensor set up.

Preferably, the plane of the mounting plate is perpendicular to the axis of the vertical plate, and the overload protection module comprises a support column arranged on the mounting plate. Because the cross section shape of riser is convex, all has higher supporting strength on most angles to the support column can directly set up on the riser, when weighing sensor receives overload pressure, the support column supports the loading board, avoids weighing sensor to continue to compress, thereby guarantees weighing sensor's life.

Preferably, the support column is provided with a plurality of support ring plates which are arranged in a circumferential array around the axis of the positioning round hole, the upper end of the support column is connected with a support ring plate which is externally expanded outside the upper pressure head, and the height of the support ring plate is matched with the height of the upper end face of the upper pressure head. The support ring plate plays a role in carrying out overload support on an annular plane, the support effect of overload protection is reliable and stable, and when the electronic scale is placed in an inclined mode, the bearing plate can be contacted with one side of the support ring plate, so that the measuring range of the electronic scale can be reduced, and the effect of prompting and flattening is achieved.

Preferably, the support column is in the shape of a truncated cone. The support column is thick at the bottom and thin at the top, and the support effect is reliable.

The utility model has the following beneficial effects: the electronic scale has a reliable overload protection function, has low requirements on the placement levelness of the electronic scale, reduces the requirements on the placement position of the electronic scale, and ensures the measurement high precision of the electronic scale.

Drawings

Fig. 1 is a schematic view of the appearance of the present utility model.

Fig. 2 is a schematic view of the internal structure of the present utility model.

Fig. 3 is an internal cross-sectional view of a weighing module according to the utility model.

Fig. 4 is a schematic view of the structure of the weighing module of the present utility model without the column sensor.

In the figure: the shell 1 power supply and control circuit 101 bearing plate 2 lifting column 201 positioning plate 202 weighing module 3 lower connecting plate 301 base 302 guide groove 303 spherical positioning seat 304 column type sensor 305 connecting bracket 31 vertical plate 311 mounting plate 312 damping elastic piece 313 ring groove 314 upper pressure head 315 overload protection module 4 support column 401 supporting ring plate 402.

Detailed Description

The utility model is further illustrated in the following, in conjunction with the accompanying drawings and specific embodiments.

In the case of example 1,

in fig. 1 to 4, a high-precision electronic scale with overload protection function comprises a shell 1, a display screen 102, a bearing plate 2, a weighing module 3 and an overload protection module 4, wherein a power supply and a control circuit 101 for connecting the weighing module 3 and the display screen 102 are fixedly arranged in the shell 1, the bearing plate 2 is arranged at the upper end of the shell 1 in a sliding lifting manner, a lifting column 201 in sliding connection with the shell 1 is arranged at the lower end of the bearing plate 2, a positioning plate 202 with the diameter larger than that of the lifting column 201 is arranged at the lower end of the lifting column 201, and the lower end of the positioning plate 202 is in contact fit with the weighing module 3. The positioning plate 202 plays a role in preventing the lifting column 201 from falling out. The weighing module 3 is provided with four at four corners of the carrier plate 2. The weighing module 3 comprises a lower connecting plate 301, a base 302 arranged on the lower connecting plate 301 and a column type sensor 305 arranged on the base 302, wherein the lower connecting plate 301 is fixedly connected to the bottom of the shell 1 through screws, a connecting bracket 31 is arranged on the lower connecting plate 301, the side face of the upper end of the column type sensor 305 is arranged on the connecting bracket 31, a damping elastic piece 313 is arranged between the connecting bracket 31 and the column type sensor 305, a spherical guide groove 303 is arranged in the base 302, and an upward-protruding spherical positioning seat 304 is arranged at the center of the bottom of the guide groove 303. An upper pressure head 315 is arranged at the upper end part of the column type sensor 305, and the upper end surface of the upper pressure head 315 is matched with the positioning plate 202. The upper end surface of the upper ram 315 is spherical. The lower end of the column sensor 305 is disposed in the guide groove 303; the overload protection module 4 adopts a supporting structure arranged on the side surface of the weighing module 3.

The connecting bracket 31 comprises two opposite vertical plates 311, the cross section of each vertical plate 311 is arc-shaped, the two vertical plates 311 are positioned on the same virtual circle, the upper ends of the two vertical plates 311 are provided with mounting plates 312, the mounting plates 312 are provided with positioning round holes, and the damping elastic pieces 313 are arranged in the positioning round holes. The damping elastic piece 313 is of a circular ring structure made of rubber materials, a limiting shoulder is arranged at the upper end of the damping elastic piece 313, the periphery of the damping elastic piece 313 is in overfeeding fit with the positioning circular hole, an inward-sinking annular groove 314 is arranged at the lower end of the damping elastic piece 313, the elasticity of the damping elastic piece 313 is improved through the annular groove 314, and the inner periphery of the damping elastic piece 313 is in interference fit with the outer periphery of the upper end of the column type sensor 305.

The plane of the mounting plate 312 is perpendicular to the axis of the vertical plate 311, and the overload protection module 4 includes a support column 401 disposed on the mounting plate 312. The support column 401 has a truncated cone shape. The support columns 401 are provided with four support columns which are arranged in a circumferential array around the axis of the positioning round hole, and the support columns 401 are correspondingly arranged above the vertical plates 311. The upper ends of the four support columns 401 are connected with a support ring plate 402 which is externally expanded outside the upper pressure head 315, and the height of the support ring plate 402 is matched with the height of the upper end face of the upper pressure head 315. The height of the upper end surface of the support ring plate 402 is determined according to the detection range of the column sensor 305, so that when the column sensor 305 detects the maximum pressure, the upper end surface of the support ring plate 402 abuts against the lifting column 201 of the bearing disc, and the overload protection effect is reliable.

The spherical structure of the guide groove 303 is used for supporting the circular arc surface of the lower end of the column type sensor 305, and the spherical positioning seat 304 is matched for supporting the circular arc of the lower end of the column type sensor 305, so that the column type sensor 305 still has reliable measurement accuracy when being inclined. When the electronic scale is placed in a non-horizontal state and slightly inclined, the lower end of the column type sensor 305 can slightly incline along with the guide groove 303, and the upper end of the column type sensor 305 is also positioned at a position with certain elasticity because of being matched with the damping elastic piece 313, so that the column type sensor 305 can be prevented from being directly clamped, the measurement result of the column type sensor 305 still has higher reliability and reliable measurement precision; the overload protection module 4 is matched with the weighing module 3, and when the column type sensor 305 receives pressure above the measuring range, the overload protection module 4 supports the bearing plate 2, so that overload protection of the weighing module 3 is realized.

Claims (6)

1. The high-precision electronic scale with the overload protection function comprises a display screen and a bearing plate, and is characterized by further comprising a weighing module and an overload protection module, wherein the weighing module comprises a lower connecting plate, a base arranged on the lower connecting plate and a column type sensor arranged on the base, a connecting bracket is arranged on the lower connecting plate, the side surface of the upper end of the column type sensor is arranged on the connecting bracket, a damping elastic piece is arranged between the connecting bracket and the column type sensor, a spherical guide groove is arranged in the base, an upper pressure head is arranged at the upper end of the column type sensor, and the lower end of the column type sensor is arranged in the guide groove; the overload protection module adopts a supporting structure arranged on the side surface of the weighing module.

2. The high-precision electronic scale with the overload protection function according to claim 1, wherein the bottom center position of the guide groove is provided with an upward convex spherical positioning seat.

3. The high-precision electronic scale with the overload protection function according to claim 1, wherein the connecting support comprises two opposite vertical plates, the cross section of each vertical plate is arc-shaped, the two vertical plates are located on the same virtual circle, mounting plates are arranged at the upper ends of the two vertical plates, positioning round holes are formed in the mounting plates, and the damping elastic piece is arranged in the positioning round holes.

4. The high-precision electronic scale with overload protection function according to claim 3, wherein the plane of the mounting plate is perpendicular to the axis of the vertical plate, and the overload protection module comprises a support column arranged on the mounting plate.

5. The high-precision electronic scale with the overload protection function according to claim 4, wherein the support column is provided with a plurality of support ring plates which are arranged in a circumferential array around the axis of the positioning round hole, the upper ends of the support column are connected with the support ring plates which are externally expanded outside the upper pressure head, and the heights of the support ring plates are matched with the heights of the upper end faces of the upper pressure head.

6. The high-precision electronic scale with overload protection function according to claim 4 or 5, wherein the shape of the support column is a truncated cone.

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