CN111768942B - Hollow installation type linear displacement potentiometer with elastic transmission - Google Patents
Hollow installation type linear displacement potentiometer with elastic transmission Download PDFInfo
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- CN111768942B CN111768942B CN202010631394.6A CN202010631394A CN111768942B CN 111768942 B CN111768942 B CN 111768942B CN 202010631394 A CN202010631394 A CN 202010631394A CN 111768942 B CN111768942 B CN 111768942B
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- 238000009434 installation Methods 0.000 title claims abstract description 38
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 24
- 230000005540 biological transmission Effects 0.000 title claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000033001 locomotion Effects 0.000 description 6
- 239000011148 porous material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/30—Adjustable resistors the contact sliding along resistive element
- H01C10/38—Adjustable resistors the contact sliding along resistive element the contact moving along a straight path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Adjustable Resistors (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses an elastic transmission hollow installation type linear displacement potentiometer, wherein a resistor body is arranged on the inner wall of a potentiometer shell, an electric brush is installed on an electric brush base, a guide rod is installed in the potentiometer shell, the electric brush base is sleeved on the guide rod, the electric brush base is connected with a first end of a driving rod, the electric brush base is provided with an installation through hole, a section of the driving rod, which is close to the first end, is a driving rod small-diameter section with a reduced outer diameter, a sleeve is sleeved outside the driving rod small-diameter section, the sleeve penetrates through the installation through hole of the electric brush base, and a pressure spring is sleeved outside the sleeve. According to the invention, through adding the sleeve and the pressure spring, an elastic connection structure between the driving rod and the electric brush base is finally realized, so that stable connection between the driving rod and the electric brush base is realized, the stability of an output signal is improved, the service life of the potentiometer is prolonged, and the number of opening gaskets can be conveniently changed when a mechanical zero position and an electrical zero position are not coincident, thereby conveniently realizing a zero position adjusting function.
Description
Technical Field
The invention relates to a linear displacement potentiometer, in particular to an elastic transmission hollow installation type linear displacement potentiometer.
Background
The linear displacement potentiometer is a potentiometer which utilizes an electric brush to linearly slide on a resistor body to generate an output variable signal, and the basic structure is that the resistor body (the resistor body is also called a variable resistor sliding rail, in order to reduce the volume, the current resistor body generally comprises a base body and high-temperature resistant conductive plastic resistor paste arranged on the working surface of the base body), the electric brush is arranged on an electric brush base, the electric brush base is directly driven by an operator to linearly move manually or driven by a driving rod driven by a motor or the like to drive the electric brush to contact and slide on the resistor body and output the variable signal, and finally the required resistance value is obtained or the linear movement distance is calculated.
When the traditional linear displacement potentiometer is connected with other parts to form products such as a sensor or a slide rheostat, a pull rod type or a slide handle type connecting structure is generally adopted, so that space is saved, the size is reduced, a hollow installation structure is generally adopted at present, namely, the driving rod passes through the potentiometer shell and then is connected with the electric brush base, in order to ensure that the moving track of the electric brush is consistent with the working surface of the resistor body, a guide rod is generally arranged in the potentiometer shell, the electric brush base is sleeved on the guide rod, and therefore, the electric brush is always contacted with the working surface of the resistor body in the moving process, and the contact pressure is the same as much as possible.
The above conventional structure can achieve the purpose of reducing the volume, but has another problem that the driving rod is generally driven by a motor, the linear motion track of the driving rod is fixed, the brush base is sleeved on the guide rod, and the linear motion track of the brush base is fixed, but in actual production, it is very difficult to assemble the two fixed linear motion parts, namely the driving rod and the guide rod, to be completely parallel, and the problem that the service life of the potentiometer is reduced or the output of the potentiometer is unstable is caused is solved.
In order to overcome the above problems, the conventional linear displacement potentiometer generally designs a connection structure between a driving rod and a brush base to be in gap connection, namely a gap is reserved between the driving rod and the brush base, but the simple gap connection structure causes the problem that the connection stability between the driving rod and the brush base is reduced, an output signal is unstable frequently, and the precision of the potentiometer is reduced; in addition, because the connecting structure between the driving rod and the brush base of the traditional linear displacement potentiometer is relatively fixed, the mechanical zero position and the electrical zero position of the traditional linear displacement potentiometer are often not coincident, and zero position adjustment is very inconvenient; in addition, the electric brush of the traditional linear displacement potentiometer adopts an outer hook structure, namely the installation end and the sliding end of the electric brush are respectively positioned at two sides of the middle section of the electric brush, so that larger space can be occupied, and the purpose that the volume of the potentiometer is reduced as much as possible is not facilitated.
Disclosure of Invention
The invention aims to solve the problems and provide the hollow installation type linear displacement potentiometer which adopts elastic connection between the driving rod and the brush base to improve the precision and is convenient for zero adjustment and has elastic transmission.
The invention realizes the above purpose through the following technical scheme:
the hollow installation type linear displacement potentiometer comprises a potentiometer shell, an electric brush base, a guide rod and a driving rod, wherein a resistor body is arranged on the inner wall of the potentiometer shell, the electric brush is installed on the electric brush base and can contact and slide on the working surface of the resistor body, the guide rod is installed in the potentiometer shell, the electric brush base is sleeved on the guide rod through a through hole of the electric brush base, the electric brush base is connected with the first end of the driving rod, and the second end of the driving rod is used for being connected with a driving motor; the hollow installation type linear displacement potentiometer comprises a sleeve and a pressure spring, wherein the brush base is provided with an installation through hole, one section of the drive rod, which is close to a first end, is a small diameter section of the drive rod, the outer diameter of which is reduced, is smaller than the diameter of the installation through hole of the brush base, the inner diameter of the sleeve is larger than the outer diameter of the small diameter section of the drive rod, the sleeve is sleeved outside the small diameter section of the drive rod, a first gap is reserved between the inner wall of the sleeve and the outer wall of the small diameter section of the drive rod, the sleeve penetrates through the installation through hole of the brush base, the outer wall of the sleeve and the installation through hole wall of the brush base are provided with a second gap, the pressure spring is sleeved outside the sleeve through the through hole, the inner wall and the outer wall of the pressure spring are respectively contacted with the outer wall of the sleeve and the installation through hole wall of the brush base, one end, which is far away from the drive rod, of the brush base is inwards protruded to form a base convex ring, one end, which is far away from the base convex ring, is provided with an outwards protruded sleeve convex ring, and the sleeve convex ring, which is respectively, and the outer diameter of the sleeve is connected with the small diameter of the drive rod and the small diameter of the drive rod is not contacted with the base.
In the structure, the driving rod and the brush base are connected through the increased sleeve and the compression spring to form an elastic connection structure, and a first gap is reserved between the inner wall of the sleeve and the outer wall of the small-diameter section of the driving rod to be used as an auxiliary measure for compensating the defect that the driving rod is not completely parallel to the guide rod, so that stable connection between the driving rod and the brush base is realized, and convenience is provided for installing a plurality of opening gaskets below to facilitate zero position adjustment.
Further, in order to be convenient for carry out zero adjustment when mechanical zero position and electrical zero position do not coincide, the position that is located on the brush base the base bulge loop outside is equipped with first "L" shape annular, drive rod end handle with install a plurality of opening washers between the cell wall of first "L" shape annular, opening washer suit is through self opening in on the drive rod path section, drive rod end handle passes through opening washer quilt the base bulge loop is blocked and can not be to being close to the direction of sleeve pipe bulge loop is removed.
Further, in order to facilitate assembly and improve the precision of fit between the parts, one end of the brush base, which is close to the sleeve convex ring, is provided with a second L-shaped annular groove, the outer diameter of the sleeve convex ring is larger than the minimum diameter of the second L-shaped annular groove, a third gap is reserved between the outer wall of the sleeve convex ring and the groove wall of the second L-shaped annular groove, and the end face of the outer end of the sleeve convex ring is in contact with a radial annular surface formed at the position where the outer diameter of the driving rod is reduced.
Preferably, in order to improve the linear movement accuracy of the brushes as much as possible, the guide rods are arranged in parallel to each other and are distributed on both sides of the driving rod.
Further, in order to improve the parallelism between the driving rod and the guide rod as much as possible, the driving motor is arranged on the whole machine shell, a positioning groove is formed in the inner wall of the whole machine shell, a positioning convex strip is arranged on the outer wall of the potentiometer shell, and the positioning convex strip is arranged in the positioning groove.
Further, in order to reduce the occupied space of the electric brush as much as possible so as to reduce the volume of the potentiometer shell, the installation end of the electric brush is connected with the electric brush base, the sliding end of the electric brush is contacted with the working surface of the resistor body, and the bending angle of the bending part between the installation end of the electric brush and the middle section of the electric brush is larger than 90 degrees, so that the installation end and the sliding end of the electric brush are respectively positioned on the same side of the middle section of the electric brush.
The invention has the beneficial effects that:
According to the invention, the sleeve and the pressure spring are added, the sleeve is sleeved outside the small-diameter section of the driving rod, the pressure spring is sleeved outside the sleeve, the electric brush base is sleeved outside the pressure spring, an elastic connection structure between the driving rod and the electric brush base is finally realized, a first gap is reserved between the inner wall of the sleeve and the outer wall of the small-diameter section of the driving rod as an auxiliary measure for compensating the defect that the driving rod is not completely parallel to the guide rod, so that stable connection between the driving rod and the electric brush base is realized, the stability of an output signal is improved, the service life of the potentiometer is prolonged, convenience is provided for conveniently installing a plurality of opening gaskets so as to facilitate zero adjustment, the opening gaskets can be installed only by pushing the driving rod to overcome the stress of the pressure spring, and the pressure spring automatically compresses the driving rod handle and the electric brush base after loosening so as to realize stable elastic connection; by installing a plurality of opening washers between the rod end handle and the groove wall of the first L-shaped annular groove of the brush base, the number of the opening washers can be conveniently changed when the mechanical zero position and the electrical zero position are not coincident, thereby conveniently realizing the zero position adjusting function.
Drawings
FIG. 1 is a front cross-sectional view of a spring-driven hollow-mount linear displacement potentiometer of the present invention;
FIG. 2 is an enlarged view of "A" in FIG. 1;
FIG. 3 is a front view of the potentiometer housing of the spring actuated hollow mounted linear displacement potentiometer of the present invention, to a greater scale than FIG. 1;
FIG. 4 is a right side view of the potentiometer housing of the spring driven hollow mounted linear displacement potentiometer of the present invention, to the same scale as FIG. 3;
Fig. 5 is a front view of the brush of the spring-driven hollow-mount linear displacement potentiometer of the present invention, to a greater scale than fig. 1 and 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-5, the hollow installation type linear displacement potentiometer of the elastic transmission comprises a potentiometer shell 2, an electric brush 5, an electric brush base 6, a guide rod 3, a driving rod 1, a sleeve 4 and a pressure spring 7, wherein a resistor 9 is arranged on the inner wall of the potentiometer shell 2, the electric brush 5 is installed on the electric brush base 6 and can slide on the working surface of the resistor 9 in a contact manner, the guide rod 3 is installed in the potentiometer shell 2, the electric brush base 6 is sleeved on the guide rod 3 through a through hole of the electric brush base 6, the electric brush base 6 is connected with the first end of the driving rod 1, and the second end of the driving rod 1 is used for being connected with a driving motor (not shown in the figure); the brush base 6 is equipped with the installation through-hole, and the one section that is close to first end on the actuating lever 1 is the actuating lever path section (not marked in the figure) that the external diameter reduces, and the external diameter of sleeve 4 is less than the installation through-hole diameter of brush base 6, and the internal diameter of sleeve 4 is greater than the external diameter of actuating lever path section, sleeve 4 suit is in outside the actuating lever path section and the inner wall of sleeve 4 with leave first clearance 12 between the outer wall of actuating lever path section, sleeve 4 pass the installation through-hole of brush base 6 and leave second clearance 13 between the outer wall of sleeve 4 and the installation through-hole pore wall of brush base 6, pressure spring 7 passes through self through-hole suit outside sleeve 4, and the inner wall and the outer wall of pressure spring 7 respectively with the outer wall of sleeve 4 and the installation through-hole pore wall of brush base 6 contact, the inside protrusion of one end of keeping away from actuating lever 1 on the installation through-hole pore wall of brush base 6 forms base bulge loop 14, and the both ends of pressure spring 7 are connected with base bulge loop 14 and sleeve bulge loop 14 respectively, actuating lever end 16 that the external diameter of actuating lever end bulge loop 16 is close to base bulge loop 16 can not be moved by base bulge loop 14.
Preferably, a first L-shaped annular groove 15 is arranged on the brush base 6 at a position which is positioned outside the base convex ring 14, a plurality of opening washers 8 are arranged between the driving rod end handle 16 and the groove wall of the first L-shaped annular groove 15, the opening washers 8 are sleeved on the small diameter section of the driving rod through openings of the opening washers, and the driving rod end handle 16 is blocked by the base convex ring 14 through the opening washers 8 and cannot move towards the direction which is close to the sleeve convex ring; a second L-shaped annular groove 11 is formed in one end, close to the sleeve convex ring, of the brush base 6, the outer diameter of the sleeve convex ring is larger than the minimum diameter of the second L-shaped annular groove 11, a third gap 10 is reserved between the outer wall of the sleeve convex ring and the groove wall of the second L-shaped annular groove 11, and the end face of the outer end of the sleeve convex ring is in contact with a radial annular surface formed at the position where the outer diameter of the driving rod 1 is reduced; the guide rods 3 are parallel to each other and distributed on two sides of the driving rod 1; the driving motor (not shown) is arranged on a whole machine shell (not shown), a positioning groove is formed in the inner wall of the whole machine shell, a positioning raised line 17 is formed in the outer wall of the potentiometer shell 2, and the positioning raised line 17 is arranged in the positioning groove; the mounting end 54 of the brush 5 is connected to the brush base 6, and the sliding end 53 of the brush 5 contacts the working surface of the resistor 9, and the bending angle of the bending portion 51 between the mounting end 54 of the brush 5 and the middle section 52 thereof is greater than 90 ° so that the mounting end 54 and the sliding end 53 of the brush 5 are located on the same side of the middle section 52 thereof, respectively.
As shown in fig. 1-5, during assembly, the resistor 9 is arranged on the inner wall of the potentiometer housing 2, the two guide rods 3 are installed in the potentiometer housing 2 and coaxial with the potentiometer housing 9, the brush base 6 is sleeved on the two guide rods 3 through the two self through holes, the two (or other quantity) brushes 5 are respectively installed on the brush base 6, the driving motor (not shown) is installed on the whole housing (not shown), the positioning raised strips 17 arranged on the outer wall of the potentiometer housing 2 are arranged in the positioning grooves on the inner wall of the whole housing, the pressure spring 7 is sleeved on the sleeve 4, the sleeve 4 is sleeved on the small diameter section of the driving rod 1, the pressure spring 7, the sleeve 4 and the small diameter section of the driving rod penetrate into the installation through holes of the brush base 6 together, the pressure spring 7 is blocked after being contacted with the convex ring 14 of the machine base, the driving rod 4 and the small diameter section of the driving rod are continuously pushed through the installation through holes of the brush base 6, then the elastic ring groove 16 is automatically pushed by the sleeve 4 and the small diameter section of the driving rod, the elastic ring groove 8 is automatically pulled down, and the elastic ring groove 8 is formed between the driving rod wall 8 and the first clamping rod 16 and the ring groove 8 is opened, and the elastic ring is opened, and the opening is formed between the opening groove 8 and the opening gasket 8 is automatically and the opening-shaped 8 is opened, and the opening-shaped, and the opening ring groove is formed, and the opening gasket is opened. If zero adjustment is needed, the mechanical zero position and the electrical zero position of the potentiometer are mutually overlapped, the number of the opening gaskets 8 can be increased or decreased according to the test result, and the adjustment is very convenient.
When the electric resistance measuring device is used, the driving motor drives the driving rod 1 to linearly move, the driving rod 1 drives the electric brush base 6 and the electric brush 5 to slide in the axial direction of the guide rod 3, the sliding end 53 of the electric brush 5 is in contact with the working surface of the resistor body 9 and outputs a variable electric signal, and finally a required resistance value is obtained or the linear movement distance of the driving rod is calculated according to the variable electric resistance value.
The above embodiments are only preferred embodiments of the present invention, and are not limiting to the technical solutions of the present invention, and any technical solution that can be implemented on the basis of the above embodiments without inventive effort should be considered as falling within the scope of protection of the patent claims of the present invention.
Claims (4)
1. The hollow installation type linear displacement potentiometer comprises a potentiometer shell, an electric brush base, a guide rod and a driving rod, wherein a resistor body is arranged on the inner wall of the potentiometer shell, the electric brush is installed on the electric brush base and can contact and slide on the working surface of the resistor body, the guide rod is installed in the potentiometer shell, the electric brush base is sleeved on the guide rod through a through hole of the electric brush base, the electric brush base is connected with the first end of the driving rod, and the second end of the driving rod is used for being connected with a driving motor; the method is characterized in that: the elastic transmission hollow installation type linear displacement potentiometer further comprises a sleeve and a pressure spring, wherein the electric brush base is provided with an installation through hole, a section of the driving rod, which is close to the first end, is a small diameter section of the driving rod, the outer diameter of the driving rod is reduced, the diameter of the sleeve is smaller than the diameter of the installation through hole of the electric brush base, the inner diameter of the sleeve is larger than the outer diameter of the small diameter section of the driving rod, the sleeve is sleeved outside the small diameter section of the driving rod, a first gap is reserved between the inner wall of the sleeve and the outer wall of the small diameter section of the driving rod, the sleeve passes through the installation through hole of the electric brush base, a second gap is reserved between the outer wall of the sleeve and the wall of the installation through hole of the electric brush base, the inner wall and the outer wall of the pressure spring are respectively contacted with the outer wall of the sleeve and the wall of the installation through hole of the electric brush base, one end, which is far away from the driving rod, of the electric brush base inwards protrudes to form a base convex ring, one end, which is far away from the base convex ring, is provided with a sleeve convex ring, which is outwards protrudes, the sleeve convex ring, is respectively, the sleeve is formed, the outer diameter of the sleeve convex ring and the end which is not contacted with the inner diameter of the driving rod and the small diameter of the base, and the convex ring is formed by the small diameter of the driving rod, and the outer diameter of the end of the driving rod is not contacted with the base, and the convex ring, and the end of which is formed by the small diameter of the driving rod and the end of the driving rod and the convex ring is respectively, and the end is correspondingly; the guide rods are parallel to each other and distributed on two sides of the driving rod; the driving motor is arranged on the whole machine shell, a positioning groove is formed in the inner wall of the whole machine shell, a positioning convex strip is arranged on the outer wall of the potentiometer shell, and the positioning convex strip is arranged in the positioning groove.
2. The spring-actuated hollow-mount linear displacement potentiometer according to claim 1, wherein: the electric brush is characterized in that a first L-shaped annular groove is formed in the position, located outside the base convex ring, of the electric brush base, a plurality of opening washers are installed between the end handle of the driving rod and the groove wall of the first L-shaped annular groove, the opening washers are sleeved on the small-diameter section of the driving rod through openings of the opening washers, and the end handle of the driving rod is blocked by the base convex ring through the opening washers and cannot move towards the direction close to the sleeve convex ring.
3. The spring-actuated hollow-mount linear displacement potentiometer according to claim 2, wherein: the brush base is provided with a second L-shaped annular groove at one end close to the sleeve convex ring, the outer diameter of the sleeve convex ring is larger than the minimum diameter of the second L-shaped annular groove, a third gap is reserved between the outer wall of the sleeve convex ring and the groove wall of the second L-shaped annular groove, and the end face of the outer end of the sleeve convex ring is in contact with a radial annular surface formed at the position where the outer diameter of the driving rod is reduced.
4. A spring-actuated hollow-mounted linear displacement potentiometer according to claim 1,2 or 3, characterized in that: the installation end of the electric brush is connected with the electric brush base, the sliding end of the electric brush is contacted with the working surface of the resistor body, and the bending angle of the bending part between the installation end of the electric brush and the middle section of the electric brush is larger than 90 degrees, so that the installation end and the sliding end of the electric brush are respectively positioned on the same side of the middle section of the electric brush.
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| CN202010631394.6A CN111768942B (en) | 2020-07-03 | 2020-07-03 | Hollow installation type linear displacement potentiometer with elastic transmission |
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| CN202010631394.6A CN111768942B (en) | 2020-07-03 | 2020-07-03 | Hollow installation type linear displacement potentiometer with elastic transmission |
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| CN111768942A CN111768942A (en) | 2020-10-13 |
| CN111768942B true CN111768942B (en) | 2024-09-24 |
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| CN114171269B (en) * | 2021-12-14 | 2024-09-24 | 成都宏明电子股份有限公司 | High vibration-resistant self-adaptive pull rod potentiometer |
| CN115682900A (en) * | 2022-10-27 | 2023-02-03 | 贵州航天控制技术有限公司 | Linear potentiometer and device having same |
| CN116417208B (en) * | 2023-06-09 | 2023-09-15 | 成都宏明电子股份有限公司 | Initial position adjustable zeroing clamp for small hollow shaft angular displacement potentiometer |
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| CN212303260U (en) * | 2020-07-03 | 2021-01-05 | 成都宏明电子股份有限公司 | Elastic transmission hollow installation type linear displacement potentiometer |
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| CN102628493B (en) * | 2012-04-26 | 2015-04-29 | 向永川 | Automatic speed changer |
| CN111322939B (en) * | 2020-03-05 | 2024-12-17 | 成都宏明电子股份有限公司 | High-precision and long-service-life composite contact type linear displacement sensor |
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| CN212303260U (en) * | 2020-07-03 | 2021-01-05 | 成都宏明电子股份有限公司 | Elastic transmission hollow installation type linear displacement potentiometer |
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