CN211452550U - Weighing unit and weighing sensor comprising same - Google Patents
Weighing unit and weighing sensor comprising same Download PDFInfo
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- CN211452550U CN211452550U CN201922477769.3U CN201922477769U CN211452550U CN 211452550 U CN211452550 U CN 211452550U CN 201922477769 U CN201922477769 U CN 201922477769U CN 211452550 U CN211452550 U CN 211452550U
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Abstract
The utility model provides a weighing unit and weighing sensor comprising the same, the weighing unit comprises a bearing part, a fixed part, a parallel guide part, a lever, a fulcrum reed and a connecting reed, two ends of the parallel guide part are respectively connected with the bearing part and the fixed part, the bearing part, the parallel guide part and the fixed part form an accommodating space, and the connecting reed, the fulcrum reed and the lever are arranged in the accommodating space; the connecting reed connects the bearing part and the lever together, the fulcrum reed connects the fixing part and the lever together, two ends of the connecting reed are provided with first grooves extending along the longitudinal direction, and the first grooves are arranged on one side of the surface of the connecting reed; the fulcrum reed is provided with a second groove extending along the longitudinal direction, and the second groove is arranged on one side of the surface of the fulcrum reed. The utility model discloses do not receive the restriction of processing cutter diameter, the short arm length of lever can accomplish very little to can make the lever than accomplish very big, thereby satisfy the requirement of wide-range weighing sensor.
Description
Technical Field
The utility model relates to an electronic balance field, in particular to weighing unit reaches weighing sensor including it.
Background
In the prior art, the operation principle of the electromagnetic weighing sensor is based on the lever principle, so that the amplification ratio of the lever directly determines the weighing range of the weighing sensor.
For sensors with a large weighing range, increasing the lever ratio is the first problem to be solved. In the prior art, one mode is that a fulcrum reed and a connecting reed of a lever are separately assembled to realize a larger lever ratio, but the mode needs a plurality of parts to be assembled together, and the defects are that the processing cost of multiple parts, the labor cost of assembly, the cost of material management, transportation and the like are high, and the performance of a weighing sensor is not good.
The other mode is a mode of integrally processing the lever fulcrum and the connecting reed, and the prior art adopts a double-arc mode by adopting the integral processing mode, and the mode has the defects that the short arm of the lever is limited by the diameter of a processing cutter, and the diameter of the cutter is always limited in actual processing, so that the short arm of the lever is limited, and the short arm of the lever directly determines the lever ratio.
In view of the above, the person skilled in the art improves the structure of the weighing cell in order to overcome the above technical problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a weighing unit and including its weighing sensor in order to overcome among the prior art the lever ratio of weighing the unit and do little defect.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
a weighing unit is characterized by comprising a bearing part, a fixing part, a parallel guide part, a lever, a fulcrum reed and a connecting reed, wherein two ends of the parallel guide part are respectively connected with the bearing part and the fixing part;
the connecting reed connects the bearing part and the lever together and serves as a force transmission part of the lever, and the fulcrum reed connects the fixing part and the lever together and serves as a supporting point of the lever;
two ends of the connecting reed are provided with first grooves extending along the longitudinal direction, and the first grooves are arranged on one side of the surface of the connecting reed; and a second groove extending along the longitudinal direction is arranged on the fulcrum reed, and the second groove is arranged on one side of the surface of the fulcrum reed.
According to the utility model discloses an embodiment, parallel guide part includes parallel guide part and lower parallel guide part, go up parallel guide part with the up end of bearing part is connected, down parallel guide part with the lower terminal surface of bearing part is connected.
According to the utility model discloses an embodiment, the fixed part includes fixed part body portion and fixed part extension, the up end of fixed part body portion with go up parallel guide and connect, the lower terminal surface of fixed part body portion with parallel guide is connected down, the fixed part extension is followed the inner wall of fixed part body portion is towards being close to the direction of bearing part extends, is located go up parallel guide with between the parallel guide down.
According to an embodiment of the utility model, the fulcrum reed includes first fulcrum reed and second fulcrum reed, first fulcrum reed will a side of fixed part with the lever links together, the second fulcrum reed will another side of fixed part with the lever links together, just first fulcrum reed with the second fulcrum reed distributes connect the both sides of reed.
According to an embodiment of the present invention, the first fulcrum reed and the second fulcrum reed are disposed with the connection reed as a central symmetry.
According to the utility model discloses an embodiment, the shape of first recess is single face arc structure or single face square structure.
According to the utility model discloses an embodiment, the shape of second recess is single face arc structure or single face square structure.
The utility model also provides a weighing sensor, its characterized in that, weighing sensor includes as above the weighing unit.
The utility model discloses an actively advance the effect and lie in:
the utility model discloses weighing unit and weighing sensor including it has adopted the project organization of a unit arc, and this kind of structure does not receive the restriction of processing cutter diameter, and the forearm length of lever can accomplish very little to can make the lever than accomplish very big, thereby satisfy the requirement of wide-range weighing sensor.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which:
fig. 1 is a perspective view of the weighing unit of the present invention.
Fig. 2 is a schematic structural view of the weighing unit after the bearing part is removed.
Fig. 3 is a side view of the weighing unit of the present invention.
Fig. 4 is a second side view of the weighing unit of the present invention.
[ reference numerals ]
Bearing part 10
Fixed part 20
Lever 40
Fulcrum reed 50
Connecting spring 60
Upper parallel guide part 31
Lower parallel guide 32
Fixed part body part 21
Fixed part extension part 22
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 1 is a perspective view of the weighing unit of the present invention. Fig. 2 is a schematic structural view of the weighing unit after the bearing part is removed. Fig. 3 is a side view of the weighing unit of the present invention. Fig. 4 is a second side view of the weighing unit of the present invention.
As shown in fig. 1 to 4, the utility model discloses a weighing unit, it includes bearing part 10, fixed part 20, parallel guide part 30, lever 40, fulcrum reed 50 and connection reed 60, is connected the both ends of parallel guide part 30 with bearing part 10 and fixed part 20 respectively, and bearing part 10, parallel guide part 30 and fixed part 20 form an accommodation space, will connect reed 60, fulcrum reed 50 and lever 40 and arrange in the accommodation space. The connection reed 60 connects the carrier part 10 and the lever 40 together to serve as a force transmission part of the lever 40, and the fulcrum reed 50 connects the fixing part 20 and the lever 40 together to serve as a supporting point of the lever 40. The load-bearing part 10 is configured to receive a load.
Preferably, first grooves 61 extending in the longitudinal direction are provided at both ends of the connection reed 60, and the first grooves 61 are provided at a single side of the surface of the connection reed 60. The shape of the first groove 61 here is preferably a single-sided arc-shaped structure (as shown in fig. 3) or a single-sided square-shaped structure (as shown in fig. 4).
Meanwhile, a second groove 53 extending in the longitudinal direction is provided on the cross section of the fulcrum reed 50, and the second groove 53 is provided on a single side of the surface of the fulcrum reed 50. The shape of the second groove 53 here is a single-sided arc structure (as shown in fig. 3) or a single-sided square structure (as shown in fig. 4).
More preferably, the parallel guide part 30 includes an upper parallel guide part 31 and a lower parallel guide part 32, the upper parallel guide part 31 being connected to the upper end surface of the carrier part 10, and the lower parallel guide part 32 being connected to the lower end surface of the carrier part 10.
Further, the fixing portion 20 includes a fixing portion body portion 21 and a fixing portion extending portion 22, an upper end surface of the fixing portion body portion 21 is connected to the upper parallel guide portion 31, a lower end surface of the fixing portion body portion 31 is connected to the lower parallel guide portion 32, and the fixing portion extending portion 22 extends along an inner wall surface of the fixing portion body portion 21 in a direction approaching the bearing portion 10, and is located between the upper parallel guide portion 31 and the lower parallel guide portion 32. The fixing portion extension 22 is connected to the lever 40 through the fulcrum spring 50.
Further, the fulcrum reed 50 includes a first fulcrum reed 51 and a second fulcrum reed 52, one side end of the fixing part 20 and the lever 40 are connected together by the first fulcrum reed 51, the other side end of the fixing part 20 and the lever 40 are connected together by the second fulcrum reed 52, and the first fulcrum reed 51 and the second fulcrum reed 52 are distributed on both sides of the connection reed 60. The first fulcrum reed 51 and the second fulcrum reed 52 are symmetrically arranged with the connection reed 60 as a center.
The utility model also provides a weighing sensor, it includes as above the weighing unit.
According to the above structural description, the connection reed 60, the fulcrum reed 50, the bearing part 10, the fixing part 20, the parallel guide part 30 and the lever 40 in the weighing unit of the present invention are preferably provided as an integral machine-formed structure. The connecting reed 60 and the fulcrum reed 50 of the weighing unit adopt a single-sided arc turning point structure, so that the weighing unit can be directly processed right ahead when the turning point of the connecting reed is processed, and can also be directly processed when the turning point of the fulcrum reed is processed. By adopting the mode, the position of the rotating point of the fulcrum reed can be infinitely close to the position of the rotating point of the connecting reed, so that the short arm of the lever can be infinitely small, the lever ratio can be infinitely large, and the problem that the lever ratio is not enough and the measuring range cannot be up is solved when the weighing sensor with a large measuring range is designed. Therefore, the weighing sensor has small size, compact structure and simple design.
The working principle of the weighing unit is as follows: when a load is applied to the bearing part 10, the connecting spring 60 transmits a force to the lever 40, the lever 40 is out of balance, and after the long arm of the lever 40 is enlarged, a photoelectric detection slit (not shown in the figure) on the tail end of the lever 40 deviates from the original balance position. The photoelectric displacement sensor detects the change of luminous flux passing through the photoelectric detection slit on the lever 40, and feeds the change back to the weighing sensor circuit device to enable the weighing sensor circuit device to generate corresponding compensation current.
This current flows through a coil (not shown) at the end of the lever's long arm, which generates a compensating force (or balance force) in the fixed magnetic field, causing the lever 40 to return to its equilibrium state, i.e., the lever detection slit (not shown) returns to its equilibrium position. The compensation current carries out a series of data acquisition and data processing through a circuit part of the electronic balance to obtain the actual weight of the loaded load.
As can be seen from the operation principle of the electromagnetic induction sensor, the force transmitted to the connection spring 60 is always constant in magnitude and vertical to and above the connection spring in the direction of the connection spring regardless of the direction and position of the force F1 applied to the receiving portion 10. According to the lever principle, the short arm is the distance X from the center point of the thinnest point of the connecting reed 60 to the center point of the thinnest point of the fulcrum reed 50, and the long arm is the distance Y from the center point of the thinnest point of the fulcrum reed 50 to the center point of the coil at the tail end of the lever. When the compensation force F2 (also called balance force) generated by the coil in the fixed magnetic field is not changed, F1 is F2 × Y/X, and the smaller X is, the larger F1 is, that is, the larger the load weight to be weighed is. The single-sided arc or square configuration shown in fig. 2 and 3 is to reduce X and increase the scale.
The utility model discloses weighing unit and weighing sensor including it has adopted the project organization of a unit arc, and this kind of structure does not receive the restriction of processing cutter diameter, and the forearm length of lever can accomplish very little to can make the lever than accomplish very big, thereby satisfy the requirement of wide-range weighing sensor.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are all within the scope of the invention.
Claims (8)
1. A weighing unit is characterized by comprising a bearing part, a fixing part, a parallel guide part, a lever, a fulcrum reed and a connecting reed, wherein two ends of the parallel guide part are respectively connected with the bearing part and the fixing part;
the connecting reed connects the bearing part and the lever together and serves as a force transmission part of the lever, and the fulcrum reed connects the fixing part and the lever together and serves as a supporting point of the lever;
two ends of the connecting reed are provided with first grooves extending along the longitudinal direction, and the first grooves are arranged on one side of the surface of the connecting reed; and a second groove extending along the longitudinal direction is arranged on the fulcrum reed, and the second groove is arranged on one side of the surface of the fulcrum reed.
2. The weighing cell of claim 1, wherein the parallel guides comprise an upper parallel guide connected to an upper end surface of the carrier and a lower parallel guide connected to a lower end surface of the carrier.
3. The weighing cell of claim 2, wherein the retainer includes a retainer body portion having an upper end surface connected to the upper parallel guide portion and a retainer extension portion having a lower end surface connected to the lower parallel guide portion, the retainer extension portion extending along an inner wall of the retainer body portion toward the carrier between the upper parallel guide portion and the lower parallel guide portion.
4. The weighing cell of claim 1, wherein the fulcrum reed includes a first fulcrum reed and a second fulcrum reed, the first fulcrum reed connects one side end of the fixing portion and the lever together, the second fulcrum reed connects the other side end of the fixing portion and the lever together, and the first fulcrum reed and the second fulcrum reed are distributed on both sides of the connection reed.
5. The weighing cell of claim 4, wherein said first fulcrum reed and said second fulcrum reed are symmetrically disposed about said connection reed.
6. The weighing cell of claim 1, wherein the first recess is shaped as a single sided arc structure or a single sided square structure.
7. The weighing cell of claim 1, wherein the second recess is shaped as a single sided arc or square structure.
8. A weighing sensor, characterized in that it comprises a weighing cell according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922477769.3U CN211452550U (en) | 2019-12-31 | 2019-12-31 | Weighing unit and weighing sensor comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922477769.3U CN211452550U (en) | 2019-12-31 | 2019-12-31 | Weighing unit and weighing sensor comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211452550U true CN211452550U (en) | 2020-09-08 |
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ID=72305205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922477769.3U Active CN211452550U (en) | 2019-12-31 | 2019-12-31 | Weighing unit and weighing sensor comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211452550U (en) |
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2019
- 2019-12-31 CN CN201922477769.3U patent/CN211452550U/en active Active
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