CN216348465U

CN216348465U - Sliding support structure for stabilizing operation and eliminating noise of pull rod of displacement sensor

Info

Publication number: CN216348465U
Application number: CN202122990660.7U
Authority: CN
Inventors: 杨龙
Original assignee: Shenzhen Shunyang Jinggong Electronic Technology Co ltd
Current assignee: Shenzhen Shunyang Jinggong Electronic Technology Co ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-04-19
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a sliding support structure for a displacement sensor pull rod to operate stably and eliminate noise. The middle part of the sliding support is a pipe body part, two sides of the pipe body part are provided with symmetrical lug parts, the lug parts are sleeved with POM engineering plastic thin sleeves, and the upper and lower positions of the rear end of the pipe body part are provided with symmetrical electric brush mounting positions. The inner wall of the shell is provided with sliding groove positions which are symmetrically arranged in opposite directions, and the protruding block part sleeved with the POM engineering plastic thin sleeve is inserted into the sliding groove positions. The sliding support is integrally injection-molded by plastic with the molding shrinkage rate of less than 2%. The sliding support is formed by injection molding of plastic with low molding shrinkage, the molding parameters are good, a POM engineering plastic thin sleeve is sleeved on the convex block part of the sliding support, the POM engineering plastic is high in density and wear-resistant, noise is eliminated, and the operation is stable.

Description

Sliding support structure for stabilizing operation and eliminating noise of pull rod of displacement sensor

Technical Field

The utility model relates to the technical field of linear displacement sensors, in particular to a sliding support structure with a displacement sensor pull rod running stably and beneficial to noise elimination.

Background

The linear displacement sensor is a displacement sensor with stable performance and high cost performance, is widely used for monitoring various mechanical linear motion data in real time, can directly display various data monitoring of mechanical linear motion by matching with an industrial control system, and gives a working instruction. The carbon film type linear displacement sensor is characterized in that resistors are uniformly distributed on a carbon film in a linear direction, voltage is applied to two ends, an electric brush slides on the linear carbon film to output voltage, a corresponding position is obtained, and a voltage signal is converted through V/A (voltage/amplitude) to obtain a current signal to be output.

At present, a carbon film type linear displacement sensor generally comprises a shell, a carbon film PCB board, a movable pull rod, a sliding support, an electric brush and the like, wherein the carbon film PCB board, the movable pull rod, the sliding support, the electric brush and the like are arranged in the shell, and the sliding support drives the electric brush to slide back and forth by the movable pull rod. The conventional sliding support is generally formed by injection molding of plastic with low shrinkage rate, and when the sliding support slides, certain sound is generated by friction between the support and the inner wall of the shell and the sliding rail. Moreover, long-term friction causes large loss, and the service life of the product is short.

SUMMERY OF THE UTILITY MODEL

To overcome the above-described deficiencies of the prior art, the present invention provides an improved solution for a sliding carriage in a displacement sensor.

The technical scheme adopted by the utility model is as follows: a displacement sensor pull rod stably operates and has a noise-eliminating sliding support structure. The middle part of the sliding support is a pipe body part, two sides of the pipe body part are provided with symmetrical lug parts, the lug parts are sleeved with POM engineering plastic thin sleeves, and the upper and lower positions of the rear end of the pipe body part are provided with symmetrical electric brush mounting positions. The rear end of the pull rod is an inserting end with the caliber smaller than that of the front end, a sleeve is inserted into the inserting end, a spring is arranged in the sleeve, the front ends of the sleeve and the spring are abutted against the front end of the inserting end, the rear end of the inserting end penetrates out of the rear end of the pipe body, and a clamp spring is arranged at the rear end of the inserting end. The inner wall of the shell is provided with sliding groove positions which are symmetrically arranged in opposite directions, and the protruding block part sleeved with the POM engineering plastic thin sleeve is inserted into the sliding groove positions.

Furthermore, the sliding support is integrally formed by injection molding of plastic with a molding shrinkage rate of less than 2%.

And damping oil is further arranged on the surface of the bump part and fills the gap between the bump part and the POM engineering plastic thin sleeve.

Further the middle part of the electric brush installation position is provided with a screw fixing hole, the two sides of the screw fixing hole are provided with positioning columns, the lower end of the electric brush is provided with an installation plate, the installation plate is provided with through holes for butt joint of the screw fixing hole and the positioning columns, the rear side of the installation plate is provided with a pressing plate, the pressing plate is also provided with through holes for butt joint of the screw fixing hole and the positioning columns, and the pressing plate and the installation plate are locked through a screw.

Further, the pull rod supporting cover is provided with a pull rod through hole penetrating through the pull rod, and the upper position, the lower position, the left position and the right position of the pull rod through hole are respectively provided with a sewage discharge hole.

The utility model has the beneficial effects that: be applied to the sliding support of linear displacement sensor pull rod through this scheme design, adopt the low plastics injection moulding's of shaping shrinkage factor sliding support, its forming parameter is better, but makes a round trip to slide in direct and the draw-in groove position in the shell, is not wear-resisting on the one hand, and on the other hand can produce certain noise. Therefore, the POM engineering plastic thin sleeve is sleeved on the convex block part of the sliding support, the POM engineering plastic is high in density, wear-resistant, beneficial to noise elimination and stable in operation. However, since the POM engineering plastic has a high molding shrinkage, it is not suitable for directly injection molding the POM engineering plastic into the sliding bracket. In addition, the symmetrical electric brush mounting positions arranged at the rear end of the sliding support enable the electric brush to be mounted at any position, and therefore the electric brush mounting position is convenient to mount. And the electric brush installation position adopts two reference columns, and a screw locks the clamp plate in the middle of the electric brush installation position, so that the electric brush is not easy to deform and stable, and the installation is simple and rapid.

The upper position, the lower position, the left position and the right position of the pull rod through hole of the pull rod supporting cover are respectively provided with a sewage discharge hole, which is beneficial to the installation of any side surface of the displacement sensor, and oil stain impurities brought into the pull rod through hole of the pull rod supporting cover by the pull rod can be well discharged from the sewage discharge holes.

Drawings

Fig. 1 is an exploded view of the overall structure of the present invention.

Fig. 2 is an exploded view of the sliding support of the present invention.

FIG. 3 is a schematic view of the assembly structure of the sliding support, the housing, and the carbon PCB of the present invention.

Fig. 4 is a schematic view of the overall structure of the present invention.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

Referring to fig. 1 to 4, a sliding bracket structure for a displacement sensor with a pull rod capable of stably operating and eliminating noise includes a housing 1, a carbon film PCB 2, a pull rod 3, a sliding bracket 4, an electric brush 5, a pull rod supporting cover 6, and an output end cover 7. The middle part of the sliding support 4 is a pipe body part, two sides of the pipe body part are provided with symmetrical bump parts 401, the bump parts 401 are sleeved with POM engineering plastic thin sleeves 8, and the upper and lower parts of the rear end of the pipe body part are provided with symmetrical electric brush mounting positions 402; the rear end of the pull rod 3 is an inserting end with the caliber smaller than that of the front end, a sleeve 31 is inserted into the inserting end, a spring 33 is arranged in the sleeve 31, the front ends of the sleeve 31 and the spring 33 are abutted against the front end of the inserting end, the rear end of the inserting end penetrates out of the rear end of the tube body, and a clamp spring 32 is arranged at the rear end of the inserting end. The inner wall of the shell 1 is provided with sliding groove positions 101 which are symmetrically arranged in opposite directions, and a convex part 401 which is sleeved with a POM engineering plastic thin sleeve 8 is inserted in the sliding groove positions 101.

Preferably, the sliding support 4 is integrally injection-molded by using plastic with a molding shrinkage rate of less than 2%, such as: the PA66 plastic is a plastic injection molded sliding support 4 with low molding shrinkage, has good molding parameters, but directly slides back and forth with the sliding groove 101 in the shell 1, so that the sliding support is not wear-resistant on one hand, and generates certain noise on the other hand. Therefore, the protruding part 401 of the sliding support 4 is sleeved with the thin POM engineering plastic sleeve 8, and the POM engineering plastic has high density, is wear-resistant, is beneficial to noise elimination, and runs more stably.

Preferably, the surface of the bump part 401 is provided with damping oil, and the damping oil fills the gap between the bump part 401 and the POM engineering plastic thin sleeve 8.

Preferably, a screw fixing hole is formed in the middle of the electric brush mounting position 402, positioning columns are arranged on two sides of the screw fixing hole, the lower end of the electric brush 5 is a mounting plate, a through hole for butting the screw fixing hole and the positioning columns is formed in the mounting plate, a pressing plate 51 is arranged on the rear side of the mounting plate, a through hole for butting the screw fixing hole and the positioning columns is also formed in the pressing plate 51, and the pressing plate 51 and the mounting plate are locked through a screw. The electric brush mounting position 402 adopts two positioning columns, and the middle screw locks the pressing plate 51, so that the electric brush is not easy to deform and stable, and the installation is simple and quick.

Preferably, the pull rod support cover 6 is provided with a pull rod through hole penetrating through the pull rod, and the upper and lower positions and the left and right positions of the pull rod through hole are respectively provided with a sewage discharge hole 601. No matter which side of the displacement sensor faces the direction, oil contamination impurities brought into the pull rod through hole of the pull rod supporting surface cover 6 by the pull rod can be well discharged from the sewage discharge hole.

The above examples of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. And obvious changes and modifications which are within the spirit of the utility model are deemed to be within the scope of the utility model.

Claims

1. The utility model provides a displacement sensor pull rod moves stable and noise elimination's sliding support structure, displacement sensor includes shell (1), carbon film PCB board (2), pull rod (3), sliding support (4), brush (5), pull rod support lid (6), output lid (7), its characterized in that: the middle part of the sliding support () is a pipe body part, two sides of the pipe body part are provided with symmetrical bump parts (401), the bump parts (401) are sleeved with POM engineering plastic thin sleeves (8), and the upper and lower positions of the rear end of the pipe body part are provided with symmetrical electric brush mounting positions (402); the rear end of the pull rod (3) is an insertion end with the caliber smaller than that of the front end, a sleeve (31) is inserted into the insertion end, a spring (33) is arranged in the sleeve (31), the front ends of the sleeve (31) and the spring (33) are abutted against the front end of the insertion end, the rear end of the insertion end penetrates out of the rear end of the tube body, and a clamp spring (32) is arranged at the rear end of the insertion end; the inner wall of the shell (1) is provided with sliding groove positions (101) which are symmetrically arranged in opposite directions, and a lug part (401) which is sleeved with a POM engineering plastic thin sleeve (8) is inserted into the sliding groove positions (101).

2. The sliding support structure for the displacement sensor, which is stable in operation and capable of eliminating noise according to claim 1, is characterized in that: the sliding support (4) is integrally formed by injection molding of plastic with a molding shrinkage rate of less than 2%.

3. The sliding support structure for the displacement sensor, which is stable in operation and capable of eliminating noise according to claim 1, is characterized in that: damping oil is arranged on the surface of the bump part (401), and the damping oil fills the gap between the bump part (401) and the POM engineering plastic thin sleeve (8).

4. The sliding support structure for the displacement sensor, which is stable in operation and capable of eliminating noise according to claim 1, is characterized in that: the electric brush installation position (402) middle part is equipped with a screw fixed orifices, and the both sides of screw fixed orifices are equipped with the reference column, and the lower extreme of electric brush (5) is the mounting panel, is equipped with the through-hole of butt joint screw fixed orifices and reference column on the mounting panel, and the mounting panel rear side is equipped with a clamp plate (51), also is equipped with the through-hole of butt joint screw fixed orifices and reference column on clamp plate (51), through a screw locking clamp plate (51) and mounting panel.

5. The sliding support structure for the displacement sensor, which is stable in operation and capable of eliminating noise according to claim 1, is characterized in that: the pull rod supporting cover (6) is provided with a pull rod through hole penetrating through the pull rod, and the upper position, the lower position, the left position and the right position of the pull rod through hole are respectively provided with a sewage discharge hole (601).