CN214378216U

CN214378216U - Structure of displacement switch

Info

Publication number: CN214378216U
Application number: CN202022858246.6U
Authority: CN
Inventors: 陈卫权
Original assignee: Jiangmen Electronics Co ltd
Current assignee: Jiangmen Electronics Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-10-08
Anticipated expiration: 2030-12-01

Abstract

The utility model discloses a displacement switch's structure, including the swivel nut, connect in the base of swivel nut tail end, install the sensor on the base, wear to locate measuring stick in swivel nut and the base, the measuring stick head end is provided with the locating wheel, the rotation axis perpendicular to measuring stick axis of locating wheel, at least partial periphery of locating wheel is located outside the terminal surface of measuring stick and swivel nut. The utility model discloses owing to set up positioning wheel and testee contact at the measuring stick tail end, when the testee along measuring stick radial motion, for rolling friction between testee and the positioning wheel, the testee can not drive the measuring stick and heels, also can not wear and tear the measuring stick, measures more accurately.

Description

Structure of displacement switch

Technical Field

The utility model relates to a detection device specifically discloses a displacement switch's structure.

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 4 can generate a clamping rod due to severe side inclination, 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 is accompanied by movement in the radial direction of the measuring stick 4, the measuring stick 4 is worn, which affects the measurement accuracy.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the problems in the prior art, it is necessary to provide a structure of a displacement switch, which has high linearity of the telescopic motion of the measuring rod, is not easy to clamp the rod, and can measure accurately.

In order to solve the prior art problem, the utility model discloses a displacement switch's structure, including the swivel nut, connect in the base of swivel nut tail end, install the sensor on the base, wear to locate measuring stick in swivel nut and the base, the measuring stick head end is provided with the locating wheel, the rotation axis perpendicular to measuring stick axis of locating wheel, at least partial periphery of locating wheel is located outside the terminal surface of measuring stick and swivel nut.

The utility model has the advantages that: the utility model discloses owing to set up positioning wheel and testee contact at the measuring stick tail end, when the testee along measuring stick radial motion, for rolling friction between testee and the positioning wheel, the testee can not drive the measuring stick and heels, also can not wear and tear the measuring stick, measures more accurately.

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 sleeve of the present invention.

Fig. 5 is a schematic view of the full-section structure of the screw sleeve of the present invention.

Fig. 6 is a schematic view of the assembly structure of the positioning block and the base of the present invention.

Fig. 7 is an assembly structure diagram of the measuring rod of the present invention.

Fig. 8 is a schematic view of the external structure 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 position 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 utility model discloses a swivel nut 1 connects in the base 2 of 1 tail ends of swivel nut, installs the sensor 3 on base 2, wears to locate measuring stick 4 in base 1 and the base 2 connects on swivel nut 1 and cage the cylinder dustcoat 5 of 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 utility model discloses a base 1 also can set up to a body structure with swivel nut 2, installs more simply like this, nevertheless for processing convenience, the utility model discloses preferred preferably is the components of a whole that can function independently structure. The utility model discloses a base 2 also can not set up mounting hole 21 and locating piece 22, directly at 2 tail end terminal surface processing of base second locating hole 23, the process still less like this, but require higher to the processing method.

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 cylindrical 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 utility model discloses an equipment mode is: 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 utility model discloses an installation mode is: 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 cooperates with the inside of the first positioning hole 11 of the base to define the maximum extension of the measuring rod 4, and the tail end of the fourth cylindrical section 44 cooperates with the snap ring 16 to define the maximum compression of the measuring rod 4.

Refer to fig. 3. The utility model discloses a working method is: in the operation process of the measured object A, the measuring rod 4 is continuously compressed, 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 has moved 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.

The utility model has the advantages that 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 linearity in 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 represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a displacement switch's structure, 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 head end of the measuring rod is provided with a positioning wheel, a 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.

2. A construction of a displacement switch according to claim 1, characterized in that: the measuring rod head end has seted up the mounting groove, is provided with the fixed axle of perpendicular to measuring rod axis in the mounting groove, the locating wheel is installed on the fixed axle.

3. A construction of a displacement switch according to claim 2, 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.

4. A construction of a displacement switch according to claim 1, characterized in that: the head end of the measuring rod is provided with a first cylindrical section, and the tail end of the measuring rod is provided with a second cylindrical section; the tail end of the first cylindrical section is connected with a third cylindrical section with the diameter larger than that of the first cylindrical section; the measuring device is characterized in that a first positioning hole matched with the first cylindrical section is formed in the head end of the threaded sleeve, the diameter of the first positioning hole is smaller than that of the third cylindrical section, a clamping groove is formed in the tail end of 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.

5. A construction of a displacement switch according to claim 4, characterized in that: the tail end of the third cylindrical section is connected with a fourth cylindrical section of which the diameter is smaller than that of the third cylindrical section and larger than the inner diameter of the snap ring, and the tail end of the fourth cylindrical section is matched with the snap ring to limit the maximum compression amount of the measuring rod.

6. A construction of a displacement switch according to claim 5, characterized in that: the tail end of the fourth cylindrical section is sequentially connected with a fifth cylindrical section and a sixth cylindrical section with decreasing diameters, the tail end of the sixth cylindrical section is connected with the second cylindrical section, and the induction contact of the sensor is positioned between the second cylindrical section and the fifth cylindrical section.

7. A construction of a displacement switch according to claim 6, characterized in that: and a chamfer is arranged at the tail end of the fifth cylindrical section.