CN112582206A - Displacement switch - Google Patents
Displacement switch Download PDFInfo
- Publication number
- CN112582206A CN112582206A CN202011399052.2A CN202011399052A CN112582206A CN 112582206 A CN112582206 A CN 112582206A CN 202011399052 A CN202011399052 A CN 202011399052A CN 112582206 A CN112582206 A CN 112582206A
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- CN
- China
- Prior art keywords
- cylindrical section
- measuring rod
- tail end
- positioning hole
- base
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/02—Switches operated by change of position, inclination or orientation of the switch itself in relation to gravitational field
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a displacement switch, which comprises a threaded sleeve, a base connected to the tail end of the threaded sleeve, a sensor arranged on the base, and a measuring rod penetrating through the threaded sleeve and the base, wherein a first positioning hole is formed in the threaded sleeve, a second positioning hole coaxial with the first positioning hole is formed in the base, a first cylindrical section matched with the first positioning hole is arranged at the head end of the measuring rod, a second cylindrical section matched with the second positioning hole is arranged at the tail end of the measuring rod, the first cylindrical section is supported in the first positioning hole, the second cylindrical section is supported in the second positioning hole, a positioning wheel is arranged at the head end of the measuring rod, the rotating shaft of the positioning wheel is perpendicular to the axis of the measuring rod, and at least part of the circumferential surface of the positioning wheel is positioned outside the end surfaces of the measuring rod and the threaded sleeve. The invention has the advantages of high linearity of the telescopic motion of the measuring rod, difficult rod clamping, accurate measurement and the like.
Description
Technical Field
The invention relates to a detection device, and particularly discloses a displacement switch.
Background
Refer to fig. 1. The existing displacement switch comprises a threaded sleeve 1 and a base 2 connected to one end of the threaded sleeve 1, wherein a guide groove 2A is formed in the base 2, and a sensor 3 is installed above the guide groove 2A. The measuring rod 4 penetrates into the threaded sleeve 1 and the base 2, the head end of the measuring rod extends out of the head end face of the threaded sleeve 1 and is used for abutting against a measured object, and the tail end of the measuring rod is located in the guide groove 2A of the base 2 and is connected with a sliding block 4A. The slide block 4A is matched with the guide groove 2A for guiding the linear motion of the measuring rod 4. A touch inclined plane 4B is arranged on the sliding block 4A, and the touch inclined plane 4B is used for pressing a detection contact of the sensor 3 to excite an alarm signal. The sensor 3 is a precision device, and in order to obtain an accurate detection signal, the distance between the detection contact and the slider 4 needs to be precisely controlled. Because the motion driving force of measuring stick 4 is at its head end, its concertina movement only relies on guide way 21 and slider 4A spacing, is difficult to guarantee measuring stick 4 linear motion, and the slider 4A slides the in-process and takes place to heel easily. The distance between the sliding block 4 and the detection contact of the sensor can be changed when the sliding block 4 inclines, so that the detection contact of the side sensor 3 can not detect the sliding block 4A, or the sliding block 4A directly bumps the detection contact of the sensor 3; the slide block 4A can generate a clamping rod when being seriously inclined, so that the movement of a measured object is blocked, and the operation accident of equipment is caused. In addition, when the object to be measured moves along the measuring rod 4 along the radial direction, the measuring rod 4 is worn, and the measuring accuracy is affected.
Disclosure of Invention
Therefore, it is necessary to provide a displacement switch which has high linearity of the telescopic motion of the measuring rod, is not easy to clamp the rod and can accurately measure the displacement, aiming at the problems in the prior art.
In order to solve the prior art problems, the invention discloses a displacement switch, which comprises a threaded sleeve, a base connected to the tail end of the threaded sleeve, a sensor arranged on the base, and a measuring rod arranged in the threaded sleeve and the base in a penetrating manner, wherein a first positioning hole is formed in the threaded sleeve, a second positioning hole coaxial with the first positioning hole is formed in the base, a first cylindrical section matched with the first positioning hole is arranged at the head end of the measuring rod, a second cylindrical section matched with the second positioning hole is arranged at the tail end of the measuring rod, the first cylindrical section is supported in the first positioning hole, the second cylindrical section is supported in the second positioning hole, a positioning wheel is arranged at the head end of the measuring rod, the rotating shaft of the positioning wheel is perpendicular to the axis of the measuring rod, and at least part of the circumferential surface of the positioning wheel is positioned outside the end surfaces of the measuring rod and the threaded sleeve.
The invention has the beneficial effects that: according to the invention, the first cylindrical section and the second cylindrical section at the two ends of the measuring rod are respectively supported by the first positioning hole and the second positioning hole which are coaxial, so that the measuring rod has high straightness of telescopic motion and is not easy to clamp; and because the positioning wheel is contacted with the measured object, when the measured object moves along the radial direction of the measuring rod, rolling friction is formed between the measured object and the positioning wheel, the measuring object cannot drive the measuring rod to incline, the measuring rod cannot be abraded, and the measurement is more accurate.
Drawings
Fig. 1 is a schematic structural diagram of a conventional displacement switch.
Fig. 2 is a schematic view of the assembly structure of the present invention.
Fig. 3 is a schematic view of the full-section structure of the present invention.
Fig. 4 is a schematic structural view of the screw insert of the present invention.
Fig. 5 is a schematic view of a full-section structure of the screw sleeve of the present invention.
FIG. 6 is a schematic view of an assembly structure of the positioning block and the base according to the present invention.
Fig. 7 is a schematic view of an assembly structure of the measuring stick of the present invention.
Fig. 8 is an external structural view of the present invention.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. Hereinafter, the head end of a certain member or portion refers to one end of the member or portion facing the object to be measured when the displacement switch is mounted, and the tail end refers to the other end opposite to the head end. The above description of the orientation only shows the relative positional relationship in the drawings of the present invention, and does not represent an absolute limitation to the scope of the present invention.
Refer to fig. 2, 3 and 8. The invention comprises a threaded sleeve 1, a base 2 connected with the tail end of the threaded sleeve 1, a sensor 3 arranged on the base 2, a measuring rod 4 arranged in the base 1 and the base 2 in a penetrating way, and a cylindrical outer cover 5 connected on the threaded sleeve 1 and covering the base 1.
Refer to fig. 4 and 5. The thread insert 1 is cylindrical and is provided with a thread insert inner hole 10, a first abdicating groove 11a and a second abdicating groove 11b which are perpendicular to each other are arranged on the end face of the head end of the thread insert, and a first step 12a for connecting the outer cover 5 and a second step 12b for connecting the base 2 are arranged on the tail end of the thread insert. The screw sleeve 1 is provided with a mounting thread 13 on the periphery. The head end of the screw sleeve 1 is provided with a first positioning hole 11 which is coaxial with the screw sleeve inner hole 10 and has a diameter smaller than the screw sleeve inner hole 10, and the tail end of the screw sleeve is provided with a clamping groove 15.
Refer to fig. 3 and 6. The base 2 is cylindrical and is provided with a base inner hole 20, the head end of the base inner hole is connected with the tail end of the screw sleeve 1, and the tail end of the base inner hole is provided with a mounting hole 21 which is coaxial with the inner hole 20. A positioning block 22 is arranged in the mounting hole 21, and a second positioning hole 23 coaxial with the first positioning hole 11 is arranged in the positioning block 22. The base 2 is provided with a mounting groove 24 communicated with the inner hole 20 of the base, and one side of the mounting groove 24 is provided with a threaded hole 25. The base 1 of the present invention may be integrally formed with the screw sleeve 2, so that the installation is easier, but the present invention is preferably a separate structure for the sake of convenience in processing. The base 2 of the present invention may not be provided with the mounting hole 21 and the positioning block 22, and the second positioning hole 23 is directly machined on the end face of the tail end of the base 2, so that the number of processes is reduced, but the requirement on the machining method is higher.
Refer to fig. 7. The measuring rod 4 is cylindrical and is composed of a plurality of cylindrical sections with different diameters, a first cylindrical section 41 matched with the first positioning hole 11 is arranged at the head end of the measuring rod, and a second cylindrical section 42 matched with the second positioning hole 23 is arranged at the tail end of the measuring rod. The tail end of the first cylindrical section 41 is connected with a third cylindrical section 43 with a diameter larger than that of the first positioning hole 11, the tail end of the third cylindrical section 43 is connected with a fourth cylindricity section 44 with a diameter smaller than that of the third cylindrical section 43, the tail end of the fourth cylindrical section 44 is connected with a fifth cylindrical section 45 with a diameter smaller than that of the fourth cylindrical section 44, the tail end of the fifth cylindrical section 45 is connected with a sixth cylindrical section 46 with a diameter smaller than that of the fifth cylindrical section 45 and that of the second cylindrical section 42, and the tail end of the sixth cylindrical section 46 is connected with the second cylindrical section 42. The fifth cylindrical section 45 is provided with a chamfer 451 at the end. The first cylindrical section 41 is provided with an installation groove 411 which penetrates through the end surface of the head end of the measuring rod 4, shaft holes 412 are arranged on two sides of the installation groove 411, and the axis of the shaft hole 412 is perpendicular to the axis of the measuring rod 4. A fixed shaft 47 is arranged in the shaft hole 412, two clamping grooves 471 are arranged on the fixed shaft 47, a positioning wheel 48 capable of rotating around the fixed shaft 47 is installed between the two clamping grooves 471, and the two clamping springs 472 are clamped into the two clamping grooves 471 respectively to limit the positioning wheel 48 and the fixed shaft 47.
Refer to fig. 2 and 3. The assembly mode of the invention is as follows: 1) the head end of the measuring rod 4 is inserted from the tail end of the threaded sleeve 1 until the third cylindrical section 43 of the measuring rod abuts against the inner side of the first positioning hole 11; 2) sleeving the anti-backlash spring 6 into the measuring rod 4 from the tail end of the threaded sleeve 1, abutting against the tail end of a third cylindrical section 43 of the measuring rod 4, clamping the snap ring 16 into the clamping groove 15 of the threaded sleeve 1 to fix the anti-backlash spring 6, wherein the inner diameter of the snap ring 15 is smaller than the outer diameter of a fourth cylindrical section 44; 3) fixing the positioning block 22 in the mounting hole 21 of the base 2, then sleeving the inner hole 20 of the base from the tail end of the measuring rod 4 until the head end of the base 2 abuts against the second step 12b of the screw sleeve 1, inserting the second cylindrical section 42 of the measuring rod 4 into the second positioning hole 23 in the positioning block 22, and welding the base 2 and the screw sleeve 1; 4) placing a positioning wheel 48 into the mounting groove 411 of the measuring rod 4, then passing a fixed shaft 47 through the positioning wheel 48 and two shaft holes 412 of the measuring rod 4, and then respectively clamping two clamp springs 472 into two clamping grooves 471 to limit the positioning wheel 48 and the fixed shaft 47, wherein the positioning wheel 48 is positioned in a first abdicating groove 11a of the screw sleeve 1, part of the circumferential surface of the positioning wheel is positioned outside the head end surfaces of the measuring rod 4 and the screw sleeve 1, and two ends of the fixed shaft 47 are positioned in a second abdicating groove 11 b; 5) fixing a sensor 3 in a mounting groove 24 on a base 2 by screws passing through threaded holes 25, wherein a sensor sensing contact 31 faces to an inner hole 20 of the base and is arranged at a proper position between a second cylindrical section 42 and a fifth cylindrical section 45 of a measuring rod 4, a terminal 32 of the sensor 3 faces to the outside of the base 2, and a lead wire (not shown) is connected to the terminal 32; 6) the outer cover 5 is sleeved from the tail end of the base 2 until the opening of the outer cover abuts against the first step 12a of the screw sleeve 1, and the outer cover 5 and the screw sleeve 1 are welded.
Refer to fig. 3. The installation mode of the invention is as follows: firstly, a rear nut M2 is screwed into the external thread 13 of the screw sleeve, then the screw sleeve 1 passes through the case B, a front nut M1 is screwed into the external thread 13 of the screw sleeve outside the case B, and the screw sleeve 1 is clamped on the case B by the front nut M1 and the rear nut M2. The distance and the verticality between the positioning wheel 48 and the measured object A need to be adjusted in the installation process, so that the positioning wheel 48 is abutted against the measured object A, the gap eliminating spring 6 is properly compressed, and the positioning wheel 48 has proper pre-tightening pressure on the measured object A. When the measured object a moves along the radial direction of the measuring rod 4, the tangent line of the contact point of the positioning wheel 48 and the measured object is parallel to the radial movement direction, so that when the measured object a moves along the radial direction of the measuring rod 4, the positioning wheel 48 is driven to roll, and the measured object a and the positioning wheel 48 are in rolling friction. The anti-backlash spring 6 is used for providing pre-tightening force for the measuring rod 4 and eliminating a gap between the measuring rod 4 and the measured object A. The head end of the third cylindrical section 43 of the measuring rod 4 is matched with the inner side of the first positioning hole 11 of the base to limit the maximum extension of the measuring rod 4, and the tail end of the fourth cylindrical section 44 is matched with the snap ring 16 to limit the maximum compression of the measuring rod 4.
Refer to fig. 3. The working mode of the invention is as follows: the measuring rod 4 is continuously compressed in the operation process of the measured object A, and after the measuring rod 4 moves to the chamfer 451 at the tail end of the fifth cylindrical section 45 and is contacted with the sensing contact 31 of the sensor 3, the chamfer 451 slowly compresses the sensing contact 31 until the sensor 3 sends out an alarm signal to prompt that the measured object A is operated to an alarm position. The tail end of the fifth cylindrical section 45 is provided with a chamfer 451, so that the impact on the sensing contact 31 can be relieved, and the direct impact of the tail end of the fifth cylindrical section 45 on the sensing contact 31 of the sensor can be avoided.
According to the invention, the first cylindrical section and the second cylindrical section at the two ends of the measuring rod are respectively supported by the first positioning hole and the second positioning hole which are coaxial, so that the measuring rod has high straightness of telescopic motion and is not easy to clamp; and because the positioning wheel is contacted with the measured object, when the measured object moves along the radial direction of the measuring rod, rolling friction is formed between the measured object and the positioning wheel, the measuring object cannot drive the measuring rod to incline, the measuring rod cannot be abraded, and the measurement is more accurate.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The utility model provides a displacement switch, includes the swivel nut, connects in the base of swivel nut tail end, installs the sensor on the base, wears to locate measuring stick in swivel nut and the base, its characterized in that: the measuring device is characterized in that a first positioning hole is formed in the threaded sleeve, a second positioning hole coaxial with the first positioning hole is formed in the base, a first cylindrical section matched with the first positioning hole is arranged at the head end of the measuring rod, a second cylindrical section matched with the second positioning hole is arranged at the tail end of the measuring rod, the first cylindrical section is supported in the first positioning hole, the second cylindrical section is supported in the second positioning hole, a positioning wheel is arranged at the head end of the measuring rod, a rotating shaft of the positioning wheel is perpendicular to the axis of the measuring rod, and at least part of circumferential surface of the positioning wheel is located outside the end surfaces of the measuring rod and the threaded sleeve.
2. A displacement switch according to claim 1, characterized in that: the measuring rod is characterized in that the tail end of the first cylindrical section is connected with a third cylindrical section, the diameter of the third cylindrical section is larger than that of the first positioning hole, a clamping groove is formed in the threaded sleeve, a clamping ring is arranged in the clamping groove, a gap eliminating spring is sleeved on the measuring rod, one end of the gap eliminating spring is abutted to the tail end of the third cylindrical section, the other end of the gap eliminating spring is abutted to the clamping ring, and the head end of the third cylindrical section is matched with the inner side of the first positioning hole of the base to limit the maximum extension amount of the measuring rod.
3. A displacement switch according to claim 2, characterized in that: the tail end of the third cylindrical section is connected with a fourth cylindricity section of which the diameter is smaller than that of the third cylindrical section and larger than the inner diameter of the clamping ring, and the tail end of the fourth cylindricity section is matched with the clamping ring to limit the maximum compression amount of the measuring rod.
4. A displacement switch according to claim 3, characterized in that: the tail end of the fourth cylindrical section is connected with a fifth cylindrical section with the diameter smaller than that of the fourth cylindrical section, the tail end of the fifth cylindrical section is connected with a sixth cylindrical section with the diameter smaller than that of the fifth cylindrical section and that of the second cylindrical section, the tail end of the sixth cylindrical section is connected with the second cylindrical section, and the sensing contact of the sensor is positioned between the second cylindrical section and the fifth cylindrical section.
5. A displacement switch according to claim 4, characterized in that: and a chamfer is arranged at the tail end of the fifth cylindrical section.
6. A displacement switch according to claim 1, characterized in that: the head end of the base is connected with the tail end of the threaded sleeve, the tail end of the base is provided with a mounting hole, a positioning block is arranged in the mounting hole, and the second positioning hole is formed in the positioning block.
7. A displacement switch according to claim 1, characterized in that: the measuring rod is characterized in that a mounting groove penetrating through the end face of the head end of the measuring rod is formed in the first cylindrical section of the measuring rod, fixing shafts perpendicular to the axis of the measuring rod are arranged on two sides of the mounting groove, and the positioning wheels are mounted on the fixing shafts.
8. A displacement switch according to claim 7, characterized in that: the head end of the thread insert is provided with a first abdicating groove and a second abdicating groove which are perpendicular to each other, the positioning wheel is positioned in the first abdicating groove, and the two ends of the fixing shaft are positioned in the second abdicating groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011399052.2A CN112582206A (en) | 2020-12-01 | 2020-12-01 | Displacement switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011399052.2A CN112582206A (en) | 2020-12-01 | 2020-12-01 | Displacement switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112582206A true CN112582206A (en) | 2021-03-30 |
Family
ID=75128166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011399052.2A Pending CN112582206A (en) | 2020-12-01 | 2020-12-01 | Displacement switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112582206A (en) |
-
2020
- 2020-12-01 CN CN202011399052.2A patent/CN112582206A/en active Pending
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