CN106768535B - Double-range detection torque sensor with overload protection and manufacturing method thereof - Google Patents
Double-range detection torque sensor with overload protection and manufacturing method thereof Download PDFInfo
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- CN106768535B CN106768535B CN201710022104.6A CN201710022104A CN106768535B CN 106768535 B CN106768535 B CN 106768535B CN 201710022104 A CN201710022104 A CN 201710022104A CN 106768535 B CN106768535 B CN 106768535B
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- elastic shaft
- outer cover
- cover body
- limiting
- ejector rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a double-range detection belt overload protection torque sensor and a manufacturing method thereof, wherein the double-range detection belt overload protection torque sensor comprises a first elastic shaft and a second elastic shaft which are fixedly connected and overlapped with each other, strain gauges for testing the torque are attached to the outer surfaces of the first elastic shaft and the second elastic shaft, and an outer cover body is fixedly connected to the outer part of the first elastic shaft; the lower end face of the outer cover body and the upper surface of the second elastic shaft are provided with first limiting structures which are matched with each other and used for limiting the lower end of the outer cover body and the second elastic shaft to rotate relatively; the outer cover body is provided with an inwardly extending ejector rod, and the lower part of the first elastic shaft is provided with a second limiting structure for limiting the first elastic shaft and the ejector rod to rotate relatively; the first limiting structure and the second limiting structure are provided with a gap reserved at only one position for the relative rotation of the two limited components. The structure can meet the requirement of carrying out larger measurement on the torque range difference of the same measured object and avoid damage to the strain gauge with smaller range caused by overlarge torque.
Description
Technical Field
The invention relates to a double-range detection belt overload protection torque sensor and a manufacturing method thereof.
Background
Torque sensors are the detection of the perception of torsional moment on various rotating or non-rotating mechanical components. The torque sensor converts the physical change of torsion into an accurate electric signal, and in some special test cases, the torque test with a large difference is required to be carried out on the same tested object, for example, in the use case of 100-1000 times of the phase difference range, in order to ensure the precision, the torque sensors with different ranges are required, and if the torque sensors are simultaneously measured, the strain gauge with a small range is damaged.
Disclosure of Invention
The invention improves the problems, namely the technical problem to be solved by the invention is that a sensor with a smaller measuring range can be damaged under the condition of larger testing range difference of the same detected object.
The specific embodiments of the invention are: the double-range detection belt overload protection torque sensor comprises a first elastic shaft and a second elastic shaft which are fixedly connected and overlapped with each other, strain gauges for testing the torque are attached to the outer surfaces of the first elastic shaft and the second elastic shaft, and an outer cover body is fixedly connected to the outer part of the first elastic shaft;
the lower end face of the outer cover body and the upper surface of the second elastic shaft are provided with first limiting structures which are matched with each other and used for limiting the lower end of the outer cover body and the second elastic shaft to rotate relatively;
the outer cover body is provided with an inwardly extending ejector rod, and the lower part of the first elastic shaft is provided with a second limiting structure for limiting the first elastic shaft and the ejector rod to rotate relatively;
the first limiting structure and the second limiting structure are provided with a gap reserved at only one position for the relative rotation of the two limited components.
Further, the first limiting structure comprises a fixed bolt hole arranged at the lower end of the outer cover body and the upper end face of the second elastic shaft, and a first locking bolt is arranged in the fixed bolt hole so that the lower end of the outer cover body is fixedly connected with the second elastic shaft;
the second limit structure comprises a second locking bolt arranged at the lower part of the first elastic shaft, the lower surface of the ejector rod is provided with an opening buckled at the upper part of the second locking bolt, and the cross-sectional area of the opening is larger than that of the second locking bolt so as to reserve a space for the ejector rod and the first elastic shaft to rotate relatively.
Further, the first limiting structure comprises a limiting bolt hole arranged at the lower end of the outer cover body and the upper end face of the second elastic shaft, the upper end face of the second elastic shaft is provided with a first locking bolt, and the aperture of the limiting bolt hole at the lower end of the outer cover body is larger than the diameter of the first locking bolt so as to reserve a space for the lower end of the cover body to rotate relative to the second elastic shaft;
the second limiting structure comprises a fixing bolt hole on the lower portion of the first elastic shaft and the lower surface of the ejector rod, and a second locking bolt penetrating through the ejector rod and the first elastic shaft is arranged in the fixing bolt hole so as to fixedly connect the ejector rod and the first elastic shaft.
Further, a groove is formed in the middle of the second elastic shaft, and the lower portion of the first elastic shaft is arranged in the groove.
Further, the second elastic shaft is externally provided with a housing.
Further, the middle parts of the first elastic shaft and the second elastic shaft are provided with a middle hole communicated with each other, the outer cover is provided with a sensor output interface, and the strain gauge circuit is connected with the sensor output interface through the middle hole.
Further, a fixing hole is formed below the second elastic shaft.
The manufacturing method of the double-range detection belt overload protection torque sensor comprises the following steps:
(1) The method comprises the steps of arranging a first elastic shaft and a second elastic shaft which are fixedly connected and overlapped with each other, attaching strain gauges for testing the torque on the outer surfaces of the first elastic shaft and the second elastic shaft, and fixedly connecting an outer cover body outside the first elastic shaft;
(2) The lower end surface of the outer cover body and the upper surface of the second elastic shaft are provided with first limit structures which are matched with each other and used for limiting the lower end of the outer cover body and the second elastic shaft to rotate relatively; the outer cover body is provided with an inwardly extending ejector rod, and the lower part of the first elastic shaft is provided with a second limiting structure for limiting the first elastic shaft and the ejector rod to rotate relatively;
the first limiting structure and the second limiting structure are provided with a gap reserved at only one position for the relative rotation of the two limited components.
Compared with the prior art, the invention has the following beneficial effects: the structure can meet the requirement of carrying out larger measurement on the torque value difference of the same measured object by utilizing the limiting structure, and avoids damage to the strain gauge with a smaller measuring range caused by overlarge torque, and when the torque with a larger measuring range is measured, the elastic shaft with the smaller measuring range is locked and the torque is transmitted to the elastic shaft with the larger measuring range.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the structure of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1-2, the dual-range detection belt overload protection torque sensor comprises a first elastic shaft 10 and a second elastic shaft 20 which are fixedly connected and overlapped with each other, strain gauges for testing the torque are attached to the outer surfaces of the first elastic shaft 10 and the second elastic shaft 20, in this embodiment, the measuring range of the strain gauge testing torque on the first elastic shaft 10 is smaller than the measuring range of the strain gauge attached to the second elastic shaft 20, and an outer cover 30 is fixedly connected to the outer part of the first elastic shaft;
in the embodiment of the invention, the upper ends of the outer cover body 30 and the first elastic shaft 10 are provided with connecting bolt holes 101 communicated with each other and used for connecting with a tested member, and the connecting bolt holes are mainly used for arranging locking pieces when connecting with a tested object.
The lower end surface of the outer cover 30 and the upper surface of the second elastic shaft 20 are provided with first limiting structures which are matched with each other and used for limiting the lower end of the outer cover 30 and the second elastic shaft 20 to rotate relatively;
the outer cover 30 is provided with an inwardly extending ejector rod 40, and the lower part of the first elastic shaft 10 is provided with a second limiting structure for limiting the first elastic shaft 10 and the ejector rod 40 to rotate relatively;
the first limiting structure and the second limiting structure are provided with a gap reserved at only one position for the relative rotation of the two limited components.
Embodiment one: the first limiting structure in this embodiment includes a fixing bolt hole 310 disposed at the lower end of the outer cover 30 and the upper end surface of the second elastic shaft 20, and a first locking bolt is disposed in the fixing bolt hole 310 to fixedly connect the lower end of the outer cover with the second elastic shaft; in this way, when detecting the object to be detected, the outer cover 30 fixedly connected with the object to be detected can transmit the corresponding moment to the strain gauges on the first elastic shaft 10 and the second elastic shaft 20, and of course, under the condition that the measuring range difference is extremely large, the strain gauge of the first elastic shaft 10 senses the torque value of the object to be detected first, while the strain gauge of the second elastic shaft 20 should display a smaller value, even under the condition that the difference exceeds the minimum measurement value, the strain gauge of the second elastic shaft 20 does not have corresponding data induction,
the second limiting structure comprises a second locking bolt 110 arranged at the lower part of the first elastic shaft 10, an opening 311 buckled at the upper part of the second locking bolt is arranged on the lower surface of the ejector rod 40, the cross-sectional area of the opening 311 is larger than that of the second locking bolt 110 so as to reserve a space for the ejector rod 40 and the first elastic shaft 10 to rotate relatively, and in this embodiment, the cross-sectional area of the opening 311 is larger than that of the second locking bolt reserved space by 3-5 wires.
Under the condition that the torque received by the measured object is gradually increased, once the maximum range of the strain gauge of the first elastic shaft 10 is exceeded, the first elastic shaft 10 can immediately rotate and the reserved fit clearance is reduced by rotation, so that the second locking bolt on the first elastic shaft 10 is abutted against the edge of the opening in the ejector rod 40 fixedly connected with the outer cover body 30, and overload protection of the strain gauge on the first elastic shaft 10 is realized.
Embodiment two: the first limiting structure comprises a limiting bolt hole 320 arranged at the lower end of the outer cover body 30 and the upper end face of the second elastic shaft 20, a first locking bolt is arranged at the upper end face of the second elastic shaft 20, and the aperture of the limiting bolt hole 320 at the lower end of the outer cover body 30 is larger than the diameter of the first locking bolt so as to reserve a space for the lower end of the cover body and the second elastic shaft to rotate relatively;
the second limiting structure comprises a fixing bolt hole at the lower part of the first elastic shaft 10 and the lower surface of the ejector rod 40, and a second locking bolt penetrating through the ejector rod 40 and the first elastic shaft 10 is arranged in the fixing bolt hole to realize the fixed connection of the ejector rod 40 and the first elastic shaft 10, so that when a measured object is tested in a smaller measuring range, a strain gauge on the first elastic shaft 10 can sense corresponding torque, and when the torque of the measured object is gradually increased, as the limiting bolt hole 320 at the lower end of the outer cover 30 is larger than the sectional area of the first locking bolt, the outer cover 30 can be driven to rotate under the condition that the first elastic shaft 10 is twisted in excess of the measuring range, and the overload protection of the strain gauge on the first elastic shaft 10 is realized by reducing the gap between the first locking bolt and the limiting bolt hole;
in the above embodiment, the middle portion of the second elastic shaft 20 is provided with the groove 210, the lower portion of the first elastic shaft is disposed in the groove 210, in the above embodiment, the contact surface of the first elastic shaft 10 and the second elastic shaft 20 and the contact surface of the outer cover 40 and the second elastic shaft 20 may not be considered as a completely smooth surface, and the contact surface has a corresponding friction force.
In the above embodiment, the outer cover 230 is disposed outside the second elastic shaft, the middle portions of the first elastic shaft 10 and the second elastic shaft 20 are provided with the middle holes 102, the outer cover 230 is provided with the sensor output interface 231, and the strain gauge line is connected with the sensor output interface through the middle holes.
In the above embodiment, a fixing hole 240 is provided below the second elastic shaft to fix the second elastic shaft.
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is used merely to facilitate distinguishing between components and not otherwise stated, and does not have a special meaning.
Meanwhile, if the above invention discloses or relates to parts or structural members fixedly connected with each other, the fixed connection may be understood as follows unless otherwise stated: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (2)
1. The double-range detection belt overload protection torque sensor is characterized by comprising a first elastic shaft and a second elastic shaft which are fixedly connected and overlapped with each other, strain gauges for testing the torque are attached to the outer surfaces of the first elastic shaft and the second elastic shaft, and an outer cover body is fixedly connected to the outer part of the first elastic shaft;
the lower end face of the outer cover body and the upper surface of the second elastic shaft are provided with first limiting structures which are matched with each other and used for limiting the lower end of the outer cover body and the second elastic shaft to rotate relatively;
the outer cover body is provided with an inwardly extending ejector rod, and the lower part of the first elastic shaft is provided with a second limiting structure for limiting the first elastic shaft and the ejector rod to rotate relatively;
the first limiting structure and the second limiting structure are provided with a gap reserved at only one position for the relative rotation of the two limited components;
the first limiting structure comprises a fixed bolt hole arranged at the lower end of the outer cover body and the upper end face of the second elastic shaft, and a first locking bolt is arranged in the fixed bolt hole so that the lower end of the outer cover body is fixedly connected with the second elastic shaft;
the second limiting structure comprises a second locking bolt arranged at the lower part of the first elastic shaft, the lower surface of the ejector rod is provided with an opening buckled at the upper part of the second locking bolt, and the cross section area of the opening is larger than that of the second locking bolt so as to reserve a space for the ejector rod and the first elastic shaft to rotate relatively;
the first limiting structure comprises a limiting bolt hole arranged at the lower end of the outer cover body and the upper end face of the second elastic shaft, a first locking bolt is arranged at the upper end face of the second elastic shaft, and the aperture of the limiting bolt hole at the lower end of the outer cover body is larger than the diameter of the first locking bolt so as to reserve a space for the lower end of the cover body to rotate relative to the second elastic shaft;
the second limiting structure comprises a fixing bolt hole on the lower part of the first elastic shaft and the lower surface of the ejector rod, and a second locking bolt penetrating through the ejector rod and the first elastic shaft is arranged in the fixing bolt hole so as to realize the fixed connection of the ejector rod and the first elastic shaft;
the middle part of the second elastic shaft is provided with a groove, and the lower part of the first elastic shaft is arranged in the groove;
a housing is arranged outside the second elastic shaft;
the middle parts of the first elastic shaft and the second elastic shaft are provided with a middle hole communicated with each other, the outer cover is provided with a sensor output interface, and the strain gauge circuit is connected with the sensor output interface through the middle hole.
2. The dual range sensing strip overload protection torque sensor of claim 1, wherein a fixed orifice is provided below the second elastic shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022104.6A CN106768535B (en) | 2017-01-12 | 2017-01-12 | Double-range detection torque sensor with overload protection and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022104.6A CN106768535B (en) | 2017-01-12 | 2017-01-12 | Double-range detection torque sensor with overload protection and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106768535A CN106768535A (en) | 2017-05-31 |
| CN106768535B true CN106768535B (en) | 2023-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710022104.6A Active CN106768535B (en) | 2017-01-12 | 2017-01-12 | Double-range detection torque sensor with overload protection and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110160676B (en) * | 2018-02-11 | 2021-10-26 | 上海微创电生理医疗科技股份有限公司 | Pressure sensor and electrophysiology catheter thereof |
| CN111215701A (en) * | 2019-12-12 | 2020-06-02 | 砀山恒海汽车饰品有限公司 | Cutting device of car ornaments processing usefulness |
| CN111551297B (en) * | 2020-04-14 | 2022-02-01 | 中国汽车技术研究中心有限公司 | Variable range dynamic torque measuring device |
| CN113624377A (en) * | 2021-08-04 | 2021-11-09 | 霍丁格必凯(苏州)电子测量技术有限公司 | Mixer torque sensor and mixer |
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