CN216554740U

CN216554740U - External hydraulic cylinder sensor assembly

Info

Publication number: CN216554740U
Application number: CN202122662837.0U
Authority: CN
Inventors: 张泽栋; 石晓永; 刘绪财; 姚顺
Original assignee: BEIJING JINZI TIANCHENG HYDRAULIC TECHNOLOGY CO LTD
Current assignee: BEIJING JINZI TIANCHENG HYDRAULIC TECHNOLOGY CO LTD
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-05-17
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses an external hydraulic cylinder sensor assembly which comprises a cylinder body, a piston and a cover plate, wherein the piston is arranged in the cylinder body, the cover plate is arranged at the upper end of the piston, the sensor assembly is arranged on the outer surface of the cylinder body, the sensor assembly comprises a pressing cover, a dust cover, a shell and a connecting plate which are sequentially connected, the shell is of a hollow structure, a sensor magnetic head is arranged in an inner cavity of the shell, a side exhaust throttle valve is arranged on one side of the shell, the bottom of the sensor magnetic head is connected with the upper end face of the connecting plate, the pressing cover is connected with the cover plate, the straight section of the pressing cover is of a concave structure, and a ball head screw is arranged at a concave position of the pressing cover. The utility model has convenient installation, convenient and safe maintenance, can keep smooth in the environment of frequent impact and vibration, has excellent reliability, can also reduce the corrosion of severe environment to the sensor assembly, prolongs the service life of the sensor assembly and integrally reduces the production cost.

Description

External hydraulic cylinder sensor assembly

Technical Field

The utility model relates to an external hydraulic cylinder sensor assembly, and belongs to the technical field of hydraulic cylinders.

Background

In the field of metallurgy, the reduction of a hydraulic cylinder needs to be fed back in real time, closed-loop control needs to be formed by the hydraulic cylinder and an electro-hydraulic servo control system, and a displacement sensor device is usually installed on the hydraulic cylinder, so that the service life and the reliability of the sensor device directly influence the rolling precision and the rolling efficiency of a strip rolling mill.

The installation mode of the traditional hydraulic cylinder sensing device can be generally divided into an internal type and an external type:

1. the built-in type is generally arranged in the middle of the hydraulic cylinder, the installation mode can reduce the using quantity of the sensors and enables the sensors to be arranged in a relatively closed space, but the built-in type is inconvenient to operate in the installation and maintenance links, the hydraulic cylinder needs to be integrally detached from a mill housing during maintenance, and then the sensors are detached from the bottom of the cylinder body, so that the maintenance difficulty is increased, and the construction risk is increased.

2. The external sensor generally can be installed with two sensors in the pneumatic cylinder outside and detect the displacement volume simultaneously, compares with built-in, and external sensor's installation is maintained more conveniently and safety, and the use occasion of pneumatic cylinder is all abominable usually, and external exposes the sensor in adverse circumstances, and this has just led to external sensor's reliability relatively poor: as on-site water vapor and rolling liquid often permeate into the external sensor device, the use of the external sensor is influenced, and the spring in the sensor device can be blocked in the environment of frequent impact and vibration, which influences the reliability of the external sensor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an external hydraulic cylinder sensor assembly which is convenient to install, convenient and safe to maintain, capable of keeping smooth in frequent impact and vibration environments, excellent in reliability, capable of reducing corrosion of severe environments to the external hydraulic cylinder sensor assembly, prolonged in service life and integrally reduced in production cost.

In order to solve the technical problems, the utility model adopts the following technical scheme: an external hydraulic cylinder sensor assembly comprises a cylinder body, a piston and a cover plate, wherein the piston is arranged in the cylinder body, the cover plate is arranged at the upper end of the piston, the outer surface of the cylinder body is provided with a sensor assembly, the sensor assembly comprises a pressing cover, a dust cover, a shell and a connecting plate which are sequentially connected, the shell is of a hollow structure, a sensor magnetic head is arranged in an inner cavity of the shell, one side of the shell is provided with a side exhaust throttle valve, the bottom of the sensor magnetic head is connected with the upper end face of the connecting plate, the pressing cover is connected with the cover plate, the straight section of the pressing cover is of a concave structure, and a ball head screw is arranged at a concave position of the pressing cover; simple to operate maintains convenient and safety, can keep unobstructed in the environment of frequent impact, vibration, has splendid reliability, can also reduce adverse circumstances to the erosion of sensor assembly, has prolonged sensor assembly's life, wholly has reduced manufacturing cost.

In the external hydraulic cylinder sensor assembly, the concave spherical pad is arranged on the upper surface of the depression of the compression cover, the disc spring is arranged on the outer surface of the screw part of the ball screw close to the nut, the disc spring is sleeved on the outer surface of the screw part of the ball screw close to the nut, the lower surface of the disc spring is connected with the convex spherical pad, and the spherical surface of the convex spherical pad is connected with the spherical surface of the concave spherical pad; the sensor assembly can keep unobstructed in the environment of frequent impact and vibration.

The external hydraulic cylinder sensor assembly is characterized in that a screw portion of a ball screw penetrates through a depression of a compression cover, one end of the screw portion of the ball screw, which penetrates through the depression of the compression cover, is connected with a movable sleeve, the movable sleeve is of a hollow structure, a magnetic grid assembly is arranged in an inner cavity of the movable sleeve, and the magnetic grid assembly is movably connected with a sensor magnetic head.

The external hydraulic cylinder sensor component comprises a magnetic grid clamp fixing plate, a magnetic grid clamp ejection sleeve, a magnetic grid clamping jaw and a magnetic grid, wherein the lower end face of the magnetic grid clamp fixing plate is connected with the top of the magnetic grid clamp ejection sleeve, the outer surface of the magnetic grid clamp ejection sleeve is connected with the inner surface of a movable sleeve, the upper end face of the magnetic grid clamping jaw is connected with the lower end face of the magnetic grid clamp fixing plate, the magnetic grid clamping jaw is arranged in the magnetic grid clamp ejection sleeve, one end of the magnetic grid is connected with the magnetic grid clamping jaw, and the other end of the magnetic grid is movably connected with a sensor magnetic head; the sensor magnetic head and the magnetic grid are in a quasi-contact working state, the magnetic grid penetrates into an inner hole of the sensor magnetic head, a magnetic coating is arranged on the surface of the magnetic grid, and the sensor magnetic head and the magnetic grid form an incremental displacement sensor.

According to the external hydraulic cylinder sensor assembly, the outer surface of the movable sleeve is sequentially provided with the limiting spacer bush and the limiting guide sleeve from top to bottom, the lower end face of the limiting spacer bush is connected with the upper end face of the limiting guide sleeve, and the outer surface of the limiting guide sleeve is connected with the inner surface of the shell; the limiting guide sleeve has a self-lubricating function and reciprocates along with the piston.

In the external hydraulic cylinder sensor assembly, the lower part of the magnetic grid clamping jacking sleeve protrudes out of the inner surface of the movable sleeve, the outer surface of the lower part of the magnetic grid clamping jacking sleeve is provided with a boss, and the upper end surface of the boss is connected with the lower end surface of the limiting guide sleeve; the boss enhances the sealing performance between the magnetic grid clamping jacking sleeve and the movable sleeve.

In the external hydraulic cylinder sensor assembly, the inner surface of the shell is provided with the dustproof sleeve, the inner surface of the dustproof sleeve is movably connected with the outer surface of the movable sleeve, the inner surface of the dustproof sleeve is provided with the dustproof groove and the sealing groove, the dustproof groove is internally provided with the dustproof ring, the sealing groove is internally provided with the pneumatic sealing ring, the inner surface of the dustproof ring is attached to the outer surface of the movable sleeve, and the inner surface of the pneumatic sealing ring is also attached to the outer surface of the movable sleeve; the dustproof sleeve is arranged in the shell in a hot-fitting mode, a dustproof ring is arranged on the inner surface of the dustproof sleeve, and the inner surface of the dustproof ring is attached to the outer surface of the movable sleeve and used for scraping dirt attached to the surface of the movable sleeve during reciprocating motion.

In the external hydraulic cylinder sensor assembly, one side of the connecting plate is provided with the mounting block, the mounting block is provided with a mounting key, the side wall of the cylinder body of the mounting block is connected, the mounting key is arranged between the mounting block and the side wall of the cylinder body, the lower end surface of the connecting plate is connected with a magnetic grid guide sleeve, the upper end surface of the magnetic grid guide sleeve is connected with a magnetic grid guide sleeve cover, the upper end surface of the magnetic grid guide sleeve cover is connected with the lower end surface of the connecting plate, the lower end surface of the magnetic grid guide sleeve is connected with a magnetic grid guide sleeve gland and a bottom exhaust throttle valve, the upper end surface of the bottom exhaust throttle valve is connected with the lower end surface of the magnetic grid guide sleeve through the magnetic grid guide sleeve gland, an A gasket is arranged between the magnetic grid guide sleeve cover and the lower end surface of the connecting plate, a B gasket is arranged between the magnetic grid guide sleeve and the magnetic grid guide sleeve gland, and a C gasket is arranged at the joint of the shell and the connecting plate; the magnetic grid guide sleeve is used for protecting the magnetic grid and preventing dirt from being attached to the outer surface of the magnetic grid, the gasket A, the gasket B and the gasket C are used for ensuring the sealing performance inside the sensor device so as to prevent rolling liquid and water vapor from entering the sensor device, the bottom exhaust throttle valve can manually adjust the air outlet and air inlet amount, and a built-in filter element of the bottom exhaust throttle valve absorbs the water vapor in the air outlet and air inlet processes.

In the external hydraulic cylinder sensor assembly, one side of the housing is further provided with a first outlet flange, the first outlet flange is connected with a second outlet flange, an outlet base plate and an outlet pressing plate are arranged between the first outlet flange and the second outlet flange, and an outlet hoop is arranged between the outlet base plate and the outlet pressing plate; the outgoing line base plate is of a half-split structure, the outgoing line pressing plate is of a half-split structure, the two petals are combined together to form an opening during installation, the outgoing line hoop is of a circular ring single-opening structure, and a cable of the magnetic head of the sensor can penetrate through the opening between the outgoing line base plate and the outgoing line pressing plate and is used for being connected with a cable protection tube.

According to the external hydraulic cylinder sensor assembly, the clamp is arranged at the joint of the dust cover and the pressing cover, and the clamp is also arranged at the joint of the dust cover and the shell.

Compared with the prior art, the utility model has the advantages of convenient installation, convenient and safe maintenance, smooth maintenance in the environment of frequent impact and vibration, excellent reliability, reduced corrosion to the utility model in severe environment, prolonged service life and integrally reduced production cost; the joint of every part is fitted with the gasket, in order to prevent rolling fluid and vapor from entering the inside of the sensor device, the utility model is fitted with side exhaust throttle valve and bottom exhaust throttle valve, side exhaust throttle valve and bottom exhaust throttle valve can regulate the air out and air inflow manually, there are side exhaust throttle valve and built-in filter core of the bottom exhaust throttle valve to absorb the vapor in the course of air out and air inflow, the utility model adopts the interference fit way between body and dust cover, the heat-seal of the dust cover is installed in body, there are dust rings on the inner surface of the dust cover, the inner surface of the dust ring is laminated with external surface of the movable sleeve, used for scraping the dirt that the surface adheres to while the reciprocating motion of the movable sleeve, have increased the service life of the utility model; the concave spherical pad, the disc spring and the convex spherical pad are matched with each other, so that the sensor assembly can keep smooth in the environment of frequent impact and vibration.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of the present invention;

FIG. 3 is an enlarged view of A of FIG. 1 in accordance with the present invention;

FIG. 4 is an enlarged view of B of FIG. 1 in accordance with the present invention;

FIG. 5 is an enlarged view of C of FIG. 1 in accordance with the present invention;

fig. 6 is a schematic view of the position structure of the cylinder and the sensor assembly of the present invention.

Reference numerals: 1-cylinder, 2-piston, 3-cover plate, 4-sensor component, 5-pressing cover, 6-dust cover, 7-shell, 8-connecting plate, 9-sensor magnetic head, 10-side exhaust throttle valve, 11-ball screw, 12-concave spherical pad, 13-disc spring, 14-convex spherical pad, 15-movable sleeve, 16-magnetic grid component, 17-magnetic grid clamping fixing plate, 18-magnetic grid clamping top sleeve, 19-magnetic grid clamping jaw, 20-magnetic grid, 21-spacing spacer sleeve, 22-spacing guide sleeve, 23-boss, 24-dust cover, 25-dust-proof groove, 26-sealing groove, 27-dust-proof ring, 28-pneumatic sealing ring, 29-mounting block, 30-mounting key, 31-a magnetic grid guide sleeve, 32-a magnetic grid guide sleeve cover, 33-a magnetic grid guide sleeve gland, 34-a bottom exhaust throttle valve, 35-A gasket, 36-B gasket, 37-C gasket, 38-a first outlet flange, 39-a second outlet flange, 40-an outlet backing plate, 41-an outlet pressing plate, 42-an outlet hoop and 43-a hoop.

The utility model is further described with reference to the following figures and detailed description.

Detailed Description

Example 1 of the utility model: the utility model provides an external pneumatic cylinder sensor module, includes cylinder body 1, piston 2 and apron 3, and in cylinder body 1 was arranged in to piston 2, apron 3 arranged piston 2 upper end in, the surface of cylinder body 1 is provided with sensor module 4, sensor module 4 including compressing tightly lid 5, dust cover 6, casing 7 and connecting plate 8 that connect gradually, casing 7 is hollow structure, is provided with sensor magnetic head 9 in casing 7's the inner chamber, and one side of casing 7 is provided with lateral part exhaust choke valve 10, sensor magnetic head 9's bottom is connected with the up end of connecting plate 8, and the aforesaid is compressed tightly lid 5 and is connected with apron 3, and the straight cross-section that compresses tightly lid 5 is the character cut in bas shape structure, and the depressed part that compresses tightly lid 5 is provided with ball screw 11.

Example 2 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; the upper surface of the depressed place of compressing tightly lid 5 is provided with concave spherical pad 12, and the surface that ball head screw 11 is close to the screw rod portion of nut department is provided with dish spring 13, the surface at ball head screw 11 is close to the screw rod portion of nut department is suit to dish spring 13, and the lower surface of dish spring 13 is connected with convex spherical pad 14, convex spherical pad 14's sphere is connected with concave spherical pad 12's sphere.

Example 3 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw portion of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw portion of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in an inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9.

Example 4 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9.

Example 5 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9; the surface of the movable sleeve 15 is sequentially provided with a limiting spacer 21 and a limiting guide sleeve 22 from top to bottom, the lower end face of the limiting spacer 21 is connected with the upper end face of the limiting guide sleeve 22, and the outer surface of the limiting guide sleeve 22 is connected with the inner surface of the shell 7.

Example 6 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9; the outer surface of the movable sleeve 15 is sequentially provided with a limiting spacer bush 21 and a limiting guide bush 22 from top to bottom, the lower end face of the limiting spacer bush 21 is connected with the upper end face of the limiting guide bush 22, and the outer surface of the limiting guide bush 22 is connected with the inner surface of the shell 7; the lower part of the magnetic grid clamping jacking sleeve 18 protrudes out of the inner surface of the movable sleeve 15, the outer surface of the lower part of the magnetic grid clamping jacking sleeve 18 is provided with a boss 23, and the upper end face of the boss 23 is connected with the lower end face of the limiting guide sleeve 22.

Example 7 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9; the outer surface of the movable sleeve 15 is sequentially provided with a limiting spacer bush 21 and a limiting guide bush 22 from top to bottom, the lower end face of the limiting spacer bush 21 is connected with the upper end face of the limiting guide bush 22, and the outer surface of the limiting guide bush 22 is connected with the inner surface of the shell 7; the lower part of the magnetic grid clamping jacking sleeve 18 protrudes out of the inner surface of the movable sleeve 15, the outer surface of the lower part of the magnetic grid clamping jacking sleeve 18 is provided with a boss 23, and the upper end face of the boss 23 is connected with the lower end face of the limiting guide sleeve 22; the inner surface of the shell 7 is provided with a dustproof sleeve 24, the inner surface of the dustproof sleeve 24 is movably connected with the outer surface of the movable sleeve 15, the inner surface of the dustproof sleeve 24 is provided with a dustproof groove 25 and a sealing groove 26, a dustproof ring 27 is arranged in the dustproof groove 25, a pneumatic sealing ring 28 is arranged in the sealing groove 26, the inner surface of the dustproof ring 27 is attached to the outer surface of the movable sleeve 15, and the inner surface of the pneumatic sealing ring 28 is also attached to the outer surface of the movable sleeve 15.

Example 8 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9; the outer surface of the movable sleeve 15 is sequentially provided with a limiting spacer bush 21 and a limiting guide bush 22 from top to bottom, the lower end face of the limiting spacer bush 21 is connected with the upper end face of the limiting guide bush 22, and the outer surface of the limiting guide bush 22 is connected with the inner surface of the shell 7; the lower part of the magnetic grid clamping jacking sleeve 18 protrudes out of the inner surface of the movable sleeve 15, the outer surface of the lower part of the magnetic grid clamping jacking sleeve 18 is provided with a boss 23, and the upper end face of the boss 23 is connected with the lower end face of the limiting guide sleeve 22; the inner surface of the shell 7 is provided with a dustproof sleeve 24, the inner surface of the dustproof sleeve 24 is movably connected with the outer surface of the movable sleeve 15, the inner surface of the dustproof sleeve 24 is provided with a dustproof groove 25 and a sealing groove 26, a dustproof ring 27 is arranged in the dustproof groove 25, a pneumatic sealing ring 28 is arranged in the sealing groove 26, the inner surface of the dustproof ring 27 is attached to the outer surface of the movable sleeve 15, and the inner surface of the pneumatic sealing ring 28 is also attached to the outer surface of the movable sleeve 15; one side of the connecting plate 8 is provided with a mounting block 29, the mounting block 29 is provided with a mounting key 30, the side walls of the cylinder body 1 of the mounting block 29 are connected, the mounting key 30 is arranged between the mounting block 29 and the side wall of the cylinder body 1, the lower end surface of the connecting plate 8 is connected with a magnetic grid guide sleeve 31, the upper end face of the magnetic grid guide sleeve 31 is connected with a magnetic grid guide sleeve cover 32, the upper end face of the magnetic grid guide sleeve cover 32 is connected with the lower end face of the connecting plate 8, the lower end face of the magnetic grid guide sleeve 31 is connected with a magnetic grid guide sleeve gland 33 and a bottom exhaust throttle valve 34, the upper end face of the bottom exhaust throttle valve 34 is connected with the lower end face of the magnetic grid guide sleeve 31 through the magnetic grid guide sleeve gland 33, an A gasket 35 is arranged between the magnetic grid guide sleeve cover 32 and the lower end face of the connecting plate 8, a B gasket 36 is arranged between the magnetic grid guide sleeve 31 and the magnetic grid guide sleeve gland 33, and a C gasket 37 is arranged at the joint of the shell 7 and the connecting plate 8.

Example 9 of the utility model: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9; the outer surface of the movable sleeve 15 is sequentially provided with a limiting spacer bush 21 and a limiting guide bush 22 from top to bottom, the lower end face of the limiting spacer bush 21 is connected with the upper end face of the limiting guide bush 22, and the outer surface of the limiting guide bush 22 is connected with the inner surface of the shell 7; the lower part of the magnetic grid clamping jacking sleeve 18 protrudes out of the inner surface of the movable sleeve 15, the outer surface of the lower part of the magnetic grid clamping jacking sleeve 18 is provided with a boss 23, and the upper end face of the boss 23 is connected with the lower end face of the limiting guide sleeve 22; the inner surface of the shell 7 is provided with a dustproof sleeve 24, the inner surface of the dustproof sleeve 24 is movably connected with the outer surface of the movable sleeve 15, the inner surface of the dustproof sleeve 24 is provided with a dustproof groove 25 and a sealing groove 26, a dustproof ring 27 is arranged in the dustproof groove 25, a pneumatic sealing ring 28 is arranged in the sealing groove 26, the inner surface of the dustproof ring 27 is attached to the outer surface of the movable sleeve 15, and the inner surface of the pneumatic sealing ring 28 is also attached to the outer surface of the movable sleeve 15; one side of the connecting plate 8 is provided with a mounting block 29, the mounting block 29 is provided with a mounting key 30, the side walls of the cylinder body 1 of the mounting block 29 are connected, the mounting key 30 is arranged between the mounting block 29 and the side wall of the cylinder body 1, the lower end surface of the connecting plate 8 is connected with a magnetic grid guide sleeve 31, the upper end surface of the magnetic grid guide sleeve 31 is connected with a magnetic grid guide sleeve cover 32, the upper end surface of the magnetic grid guide sleeve cover 32 is connected with the lower end surface of the connecting plate 8, the lower end surface of the magnetic grid guide sleeve 31 is connected with a magnetic grid guide sleeve gland 33 and a bottom exhaust throttle valve 34, the upper end surface of the bottom exhaust throttle valve 34 is connected with the lower end surface of the magnetic grid guide sleeve 31 through the magnetic grid guide sleeve gland 33, an A gasket 35 is arranged between the magnetic grid guide sleeve cover 32 and the lower end surface of the connecting plate 8, a B gasket 36 is arranged between the magnetic grid guide sleeve 31 and the magnetic grid guide sleeve gland 33, and a C gasket 37 is arranged at the joint of the shell 7 and the connecting plate 8; a first outlet flange 38 is further arranged on one side of the shell 7, a second outlet flange 39 is connected to the first outlet flange 38, an outlet cushion plate 40 and an outlet pressing plate 41 are arranged between the first outlet flange 38 and the second outlet flange 39, and an outlet hoop 42 is arranged between the outlet cushion plate 40 and the outlet pressing plate 41.

Example 10 of the present invention: an external hydraulic cylinder sensor assembly comprises a cylinder body 1, a piston 2 and a cover plate 3, wherein the piston 2 is arranged in the cylinder body 1, the cover plate 3 is arranged at the upper end of the piston 2, a sensor assembly 4 is arranged on the outer surface of the cylinder body 1, the sensor assembly 4 comprises a pressing cover 5, a dust cover 6, a shell 7 and a connecting plate 8 which are sequentially connected, the shell 7 is of a hollow structure, a sensor magnetic head 9 is arranged in an inner cavity of the shell 7, a side exhaust throttle valve 10 is arranged on one side of the shell 7, the bottom of the sensor magnetic head 9 is connected with the upper end face of the connecting plate 8, the pressing cover 5 is connected with the cover plate 3, the straight section of the pressing cover 5 is of a concave structure, and a ball head screw 11 is arranged at a concave part of the pressing cover 5; a concave spherical pad 12 is arranged on the upper surface of the depression of the compression cover 5, a disc spring 13 is arranged on the outer surface of the screw part of the ball screw 11 close to the screw cap, the disc spring 13 is sleeved on the outer surface of the screw part of the ball screw 11 close to the screw cap, a convex spherical pad 14 is connected to the lower surface of the disc spring 13, and the spherical surface of the convex spherical pad 14 is connected with the spherical surface of the concave spherical pad 12; the screw part of the ball screw 11 penetrates through the depression of the compression cover 5, one end of the screw part of the ball screw 11, which penetrates through the depression of the compression cover 5, is connected with a movable sleeve 15, the movable sleeve 15 is of a hollow structure, a magnetic grid assembly 16 is arranged in the inner cavity of the movable sleeve 15, and the magnetic grid assembly 16 is movably connected with the sensor magnetic head 9; the magnetic grid assembly 16 comprises a magnetic grid clamp fixing plate 17, a magnetic grid clamp ejection sleeve 18, a magnetic grid clamping jaw 19 and a magnetic grid 20, the lower end face of the magnetic grid clamp fixing plate 17 is connected with the top of the magnetic grid clamp ejection sleeve 18, the outer surface of the magnetic grid clamp ejection sleeve 18 is connected with the inner surface of the movable sleeve 15, the upper end face of the magnetic grid clamping jaw 19 is connected with the lower end face of the magnetic grid clamp fixing plate 17, the magnetic grid clamping jaw 19 is arranged in the magnetic grid clamp ejection sleeve 18, one end of the magnetic grid 20 is connected with the magnetic grid clamping jaw 19, and the other end of the magnetic grid 20 is movably connected with the sensor magnetic head 9; the outer surface of the movable sleeve 15 is sequentially provided with a limiting spacer bush 21 and a limiting guide bush 22 from top to bottom, the lower end face of the limiting spacer bush 21 is connected with the upper end face of the limiting guide bush 22, and the outer surface of the limiting guide bush 22 is connected with the inner surface of the shell 7; the lower part of the magnetic grid clamping jacking sleeve 18 protrudes out of the inner surface of the movable sleeve 15, the outer surface of the lower part of the magnetic grid clamping jacking sleeve 18 is provided with a boss 23, and the upper end face of the boss 23 is connected with the lower end face of the limiting guide sleeve 22; the inner surface of the shell 7 is provided with a dustproof sleeve 24, the inner surface of the dustproof sleeve 24 is movably connected with the outer surface of the movable sleeve 15, the inner surface of the dustproof sleeve 24 is provided with a dustproof groove 25 and a sealing groove 26, a dustproof ring 27 is arranged in the dustproof groove 25, a pneumatic sealing ring 28 is arranged in the sealing groove 26, the inner surface of the dustproof ring 27 is attached to the outer surface of the movable sleeve 15, and the inner surface of the pneumatic sealing ring 28 is also attached to the outer surface of the movable sleeve 15; one side of the connecting plate 8 is provided with a mounting block 29, the mounting block 29 is provided with a mounting key 30, the side walls of the cylinder body 1 of the mounting block 29 are connected, the mounting key 30 is arranged between the mounting block 29 and the side wall of the cylinder body 1, the lower end surface of the connecting plate 8 is connected with a magnetic grid guide sleeve 31, the upper end surface of the magnetic grid guide sleeve 31 is connected with a magnetic grid guide sleeve cover 32, the upper end surface of the magnetic grid guide sleeve cover 32 is connected with the lower end surface of the connecting plate 8, the lower end surface of the magnetic grid guide sleeve 31 is connected with a magnetic grid guide sleeve gland 33 and a bottom exhaust throttle valve 34, the upper end surface of the bottom exhaust throttle valve 34 is connected with the lower end surface of the magnetic grid guide sleeve 31 through the magnetic grid guide sleeve gland 33, an A gasket 35 is arranged between the magnetic grid guide sleeve cover 32 and the lower end surface of the connecting plate 8, a B gasket 36 is arranged between the magnetic grid guide sleeve 31 and the magnetic grid guide sleeve gland 33, and a C gasket 37 is arranged at the joint of the shell 7 and the connecting plate 8; a first outlet flange 38 is further arranged on one side of the shell 7, a second outlet flange 39 is connected to the first outlet flange 38, an outlet cushion plate 40 and an outlet pressing plate 41 are arranged between the first outlet flange 38 and the second outlet flange 39, and an outlet hoop 42 is arranged between the outlet cushion plate 40 and the outlet pressing plate 41; the connection part of the dust cover 6 and the pressing cover 5 is provided with a clamp 43, and the connection part of the dust cover 6 and the shell 7 is also provided with the clamp 43.

The working principle of one embodiment of the utility model is as follows: the utility model is an external structure, two sensor assemblies are arranged on a cylinder body 1 and are symmetrically arranged along the central line of the cylinder body 1, a pressing cover 5 is connected with a cover plate 3 by using an M8 screw, a ball head screw 11, a disc spring 13, a convex spherical pad 14 and a concave spherical pad 12 are arranged inside the pressing cover 5, wherein the ball head screw 11 is in threaded connection with a movable sleeve 15 through an M12 thread at the end part of the ball head screw 11; the limiting spacer bush 21 is arranged on the movable sleeve 15, the upper end of the limiting spacer bush 21 is attached to the step surface in the movable sleeve 15, the lower end of the limiting spacer bush 21 is attached to the upper end surface of the limiting guide bush 22, the lower end surface of the limiting guide bush 22 is attached to the step surface of the magnetic grid clamping and ejecting sleeve 18 and locked by an M5 screw, a certain fit clearance is formed between the limiting guide bush 22 and the shell 7, the limiting guide bush and the shell form a sliding pair, the limiting guide bush 22 is an ink-inlaid copper part and has a self-lubricating function, and the movable sleeve 15 reciprocates along with the piston 2; the shell 7 and the dustproof sleeve 24 adopt an interference fit mode, the dustproof sleeve 24 is arranged in the shell 7 in a hot-pressed mode, the inner surface of the dustproof sleeve 24 is provided with a dustproof ring 27, the inner surface of the dustproof ring 27 is attached to the outer surface of the movable sleeve 15, and the dustproof ring 27 is used for scraping dirt attached to the surface of the movable sleeve 15 during reciprocating motion; the shell 7 is arranged on the connecting plate 8 and is fixed through an M10 screw, and the C gasket 37 is arranged on the lower end face of the shell 7 and the upper end face of the connecting plate 8 and is used for ensuring the sealing performance inside the sensor device so as to prevent rolling liquid and water vapor from entering the sensor device; the sensor magnetic head 9 and the magnetic grid 20 jointly form a displacement sensor, the magnetic grid 20 is arranged on a magnetic grid clamping jaw 19, and the magnetic grid clamping jaw 19 is fixed on the movable sleeve 15 through an M4 screw; the magnetic grid guide sleeve cover 32 is fixedly connected with the connecting plate 8 through an M8 screw, a magnetic grid guide sleeve 31 is arranged in the magnetic grid guide sleeve cover 32, the magnetic grid guide sleeve 31 is made of nylon and used for protecting the magnetic grid 20 and preventing dirt from being attached to the outer surface of the magnetic grid 20, the lower end face of the magnetic grid guide sleeve cover 32 is fixedly connected with a magnetic grid guide sleeve gland 33 through an M6 screw, a B gasket 36 is arranged between the magnetic grid guide sleeve 31 and the magnetic grid guide sleeve gland 33, and the B gasket 36 is used for preventing water vapor from entering the sensor device; a side exhaust throttle valve 10 and a first outlet flange 38 are arranged on one side of the shell 7, a second outlet flange 39 is connected on the first outlet flange 38, an outlet cushion plate 40 and an outlet pressing plate 41 are arranged between the first outlet flange 38 and the second outlet flange 39, the first outlet flange 38 and the second outlet flange 39 are fixedly connected through an M6 screw and an M6 nut, the outlet cushion plate 40 is of a half-split structure, the outlet pressing plate 41 is also of a half-split structure, two petals are combined together to form an opening during installation, the outlet hoop 42 is of a circular ring single-opening structure, a cable of the sensor magnetic head 9 can penetrate through the opening between the outlet cushion plate 40 and the outlet pressing plate 41, the outlet hoop 42 is sleeved on the cable of the sensor magnetic head 9, the outlet hoop 42 is made of rubber, the outlet cushion plate 40 and the outlet pressing plate 41 tightly press the outlet hoop 42 on a matching surface of the outlet cushion plate 40 and the outlet pressing plate 41 through the screwing of the M6 screw and the M6 nut, the outer side of the second outlet flange 39 is provided with G1 threads for connecting a cable protection pipe; a dust cover 6 is arranged between the pressing cover 5 and the housing 7, and two ends of the dust cover 6 are respectively arranged on the pressing cover 5 and the housing 7 by using clamps 43 for preventing dirt from being attached to the inside of the sensor device; the bottom exhaust throttle valve 34 and the side exhaust throttle valve 10 can manually adjust the amount of exhaust and intake air when the movable sleeve 15 is reciprocated to exhaust the air in the sensor device, and the built-in filter element of the bottom exhaust throttle valve 34 and the side exhaust throttle valve 10 absorbs the water vapor during the exhaust and intake.

Claims

1. An external hydraulic cylinder sensor assembly comprises a cylinder body (1), a piston (2) and a cover plate (3), wherein the piston (2) is arranged in the cylinder body (1), the cover plate (3) is arranged at the upper end of the piston (2), it is characterized in that the outer surface of the cylinder body (1) is provided with a sensor component (4), the sensor component (4) comprises a pressing cover (5), a dust cover (6), a shell (7) and a connecting plate (8) which are connected in sequence, the shell (7) is of a hollow structure, a sensor magnetic head (9) is arranged in the inner cavity of the shell (7), a side exhaust throttle valve (10) is arranged on one side of the shell (7), the bottom of the sensor magnetic head (9) is connected with the upper end surface of the connecting plate (8), the pressing cover (5) is connected with the cover plate (3), the straight section of the pressing cover (5) is of a concave structure, and a ball head screw (11) is arranged at the concave position of the pressing cover (5).

2. The external hydraulic cylinder sensor assembly according to claim 1, wherein a concave spherical pad (12) is arranged on the upper surface of the depression of the pressing cover (5), a disc spring (13) is arranged on the outer surface of the screw part of the ball screw (11) close to the nut, the disc spring (13) is sleeved on the outer surface of the screw part of the ball screw (11) close to the nut, a convex spherical pad (14) is connected to the lower surface of the disc spring (13), and the spherical surface of the convex spherical pad (14) is connected with the spherical surface of the concave spherical pad (12).

3. The external hydraulic cylinder sensor assembly according to claim 1, wherein a screw portion of the ball screw (11) penetrates through a recess of the pressing cover (5), one end of the screw portion of the ball screw (11) penetrating through the recess of the pressing cover (5) is connected with a movable sleeve (15), the movable sleeve (15) is of a hollow structure, a magnetic grid assembly (16) is arranged in an inner cavity of the movable sleeve (15), and the magnetic grid assembly (16) is movably connected with the sensor magnetic head (9).

4. The external hydraulic cylinder sensor assembly as claimed in claim 3, wherein the magnetic grid assembly (16) comprises a magnetic grid clamp fixing plate (17), a magnetic grid clamp top sleeve (18), magnetic grid clamping jaws (19) and a magnetic grid (20), the lower end face of the magnetic grid clamp fixing plate (17) is connected with the top of the magnetic grid clamp top sleeve (18), the outer surface of the magnetic grid clamp top sleeve (18) is connected with the inner surface of the movable sleeve (15), the upper end face of the magnetic grid clamping jaws (19) is connected with the lower end face of the magnetic grid clamp fixing plate (17), the magnetic grid clamping jaws (19) are arranged in the magnetic grid clamp top sleeve (18), one end of the magnetic grid (20) is connected with the magnetic grid clamping jaws (19), and the other end of the magnetic grid (20) is movably connected with the sensor magnetic head (9).

5. The external hydraulic cylinder sensor assembly as claimed in claim 4, wherein the outer surface of the movable sleeve (15) is sequentially provided with a limiting spacer bush (21) and a limiting guide bush (22) from top to bottom, the lower end face of the limiting spacer bush (21) is connected with the upper end face of the limiting guide bush (22), and the outer surface of the limiting guide bush (22) is connected with the inner surface of the shell (7).

6. The external hydraulic cylinder sensor assembly as claimed in claim 5, wherein the lower part of the magnetic grid clamping top sleeve (18) protrudes from the inner surface of the movable sleeve (15), the outer surface of the lower part of the magnetic grid clamping top sleeve (18) is provided with a boss (23), and the upper end surface of the boss (23) is connected with the lower end surface of the limiting guide sleeve (22).

7. The external hydraulic cylinder sensor assembly according to claim 3, characterized in that the inner surface of the shell (7) is provided with a dustproof sleeve (24), the inner surface of the dustproof sleeve (24) is movably connected with the outer surface of the movable sleeve (15), the inner surface of the dustproof sleeve (24) is provided with a dustproof groove (25) and a sealing groove (26), the dustproof groove (25) is internally provided with a dustproof ring (27), the sealing groove (26) is internally provided with a pneumatic sealing ring (28), the inner surface of the dustproof ring (27) is attached to the outer surface of the movable sleeve (15), and the inner surface of the pneumatic sealing ring (28) is also attached to the outer surface of the movable sleeve (15).

8. The external hydraulic cylinder sensor assembly as recited in claim 1, characterized in that one side of the connecting plate (8) is provided with a mounting block (29), the mounting block (29) is provided with a mounting key (30), the side wall of the cylinder body (1) of the mounting block (29) is connected, the mounting key (30) is arranged between the mounting block (29) and the side wall of the cylinder body (1), the lower end surface of the connecting plate (8) is connected with a magnetic grid guide sleeve (31), the upper end surface of the magnetic grid guide sleeve (31) is connected with a magnetic grid guide sleeve cover (32), the upper end surface of the magnetic grid guide sleeve cover (32) is connected with the lower end surface of the connecting plate (8), the lower end surface of the magnetic grid guide sleeve (31) is connected with a magnetic grid guide sleeve gland (33) and a bottom exhaust throttle valve (34), the upper end surface of the bottom exhaust throttle valve (34) is connected with the lower end surface of the magnetic grid guide sleeve (31) through the magnetic grid guide sleeve gland (33), a washer (35) is arranged between the magnetic grid guide sleeve cover (32) and the lower end face of the connecting plate (8), a washer B (36) is arranged between the magnetic grid guide sleeve (31) and the magnetic grid guide sleeve gland (33), and a washer C (37) is arranged at the joint of the shell (7) and the connecting plate (8).

9. The external hydraulic cylinder sensor assembly according to claim 1, wherein a first outlet flange (38) is further arranged on one side of the housing (7), a second outlet flange (39) is connected to the first outlet flange (38), an outlet cushion plate (40) and an outlet pressing plate (41) are arranged between the first outlet flange (38) and the second outlet flange (39), and an outlet hoop (42) is arranged between the outlet cushion plate (40) and the outlet pressing plate (41).

10. The external hydraulic cylinder sensor assembly as claimed in claim 1, wherein a clamp (43) is arranged at the joint of the dust cover (6) and the pressing cover (5), and a clamp (43) is arranged at the joint of the dust cover (6) and the housing (7).