CN212615704U - Oil cylinder and engineering machinery with anti-seismic sensor - Google Patents

Oil cylinder and engineering machinery with anti-seismic sensor Download PDF

Info

Publication number
CN212615704U
CN212615704U CN202021250565.2U CN202021250565U CN212615704U CN 212615704 U CN212615704 U CN 212615704U CN 202021250565 U CN202021250565 U CN 202021250565U CN 212615704 U CN212615704 U CN 212615704U
Authority
CN
China
Prior art keywords
cylinder
sensor
hydro
cavity
mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021250565.2U
Other languages
Chinese (zh)
Inventor
邱永宁
戴亚军
尤庆成
叶菁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Hengli Hydraulic Co Ltd
Original Assignee
Jiangsu Hengli Hydraulic Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Hengli Hydraulic Co Ltd filed Critical Jiangsu Hengli Hydraulic Co Ltd
Priority to CN202021250565.2U priority Critical patent/CN212615704U/en
Application granted granted Critical
Publication of CN212615704U publication Critical patent/CN212615704U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

The utility model discloses a hydro-cylinder, engineering machine tool with antidetonation sensor, the hydro-cylinder with antidetonation sensor includes: the cylinder barrel is internally limited with a first accommodating cavity with two open ends; the cylinder bottom is fixedly connected with one end of the cylinder barrel, and an open installation cavity is defined at one side of the cylinder bottom, which is adjacent to the cylinder barrel; the piston rod is arranged in the first accommodating cavity and can move along the axis direction of the first accommodating cavity, a first pore passage extending along the axis direction of the piston rod is arranged in the piston rod, and one end, adjacent to the cylinder bottom, of the first pore passage is open and communicated with the mounting cavity; the electronic bin of the displacement sensor is arranged in the mounting cavity, and at least one part of the detection end of the displacement sensor is inserted into the first pore channel; the earring is arranged on one side of the cylinder bottom back to the position of the cylinder barrel. According to the utility model discloses hydro-cylinder with shock-resistant sensor, this hydro-cylinder structure is exquisite and processing is convenient, and hydro-cylinder bulk strength is high simultaneously, and stability is better.

Description

Oil cylinder and engineering machinery with anti-seismic sensor
Technical Field
The utility model belongs to the technical field of the hydro-cylinder, especially, relate to a hydro-cylinder, engineering machine tool with antidetonation sensor.
Background
The oil cylinder is an actuating mechanism, and is usually connected with two ends of a structure, so that the installation of the oil cylinder is very compact due to the small space of the structure. As the precision requirement of the structure on the actuating element is higher and higher, the hydraulic cylinder is provided with an electronic sensor, the sensor is used as an electronic element, the surface cannot be impacted, and therefore the sensor is arranged inside the oil cylinder.
Under the high-vibration working condition, the vibration of the rack is very strong, the oil cylinder also bears the same vibration, the damage of the vibration to the oil cylinder is very large, and particularly the damage to a sensor inside the oil cylinder is obvious. This puts higher demands on the overall structural properties of the cylinder and the high seismic resistance of the sensor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.
In view of this, the utility model provides a hydro-cylinder with antidetonation sensor, this hydro-cylinder structure is exquisite and processing is convenient, and hydro-cylinder bulk strength is high simultaneously, and stability is better.
The utility model discloses still provide an engineering machine tool, this engineering machine tool equipment is simple, and the structure is exquisite and stable performance.
According to the utility model discloses hydro-cylinder with antidetonation sensor of first aspect embodiment, include: the cylinder barrel is internally limited with a first accommodating cavity with two open ends; the cylinder bottom is fixedly connected with one end of the cylinder barrel, and an open installation cavity is defined at one side of the cylinder bottom, which is adjacent to the cylinder barrel; the piston rod is arranged in the first accommodating cavity and can move along the axis direction of the first accommodating cavity, a first pore passage extending along the axis direction of the piston rod is arranged in the piston rod, and one end, adjacent to the cylinder bottom, of the first pore passage is open and communicated with the mounting cavity; the electronic bin of the displacement sensor is arranged in the mounting cavity, and at least one part of the detection end of the displacement sensor is inserted into the first pore channel; the earring is arranged on one side of the cylinder bottom back to the position of the cylinder barrel.
According to the utility model discloses hydro-cylinder with shock-resistant sensor, through with the fixed back that links to each other at cylinder and cylinder bottom, make it form overall structure, this overall structure is strong adaptability to the components of a whole that can function independently structure to high vibrations environment, utilizes the rigidity of steel itself to resist the vibrations of structure, and the electronic storehouse that will have displacement sensor again sets up in the inside installation cavity of cylinder bottom, improves the not good problem of shock resistance ability in the use of displacement sensor of installation in the hydro-cylinder among the traditional scheme, so, according to the utility model discloses a whole shock resistance of hydro-cylinder with shock-resistant sensor strengthens, and its displacement monitoring is stable high-efficient simultaneously.
According to the utility model discloses hydro-cylinder with antidetonation sensor can also have following additional technical characterstic:
according to an embodiment of the present invention, the cylinder bottom includes: the mounting part is arranged at the open end of the mounting cavity, a second channel which is communicated along the thickness direction of the mounting part is arranged on the mounting part, two ends of the second channel are respectively communicated with the first channel and the mounting cavity, one end, close to the cylinder barrel, of the electronic bin is located in the second channel, one end, back to the cylinder barrel, of the electronic bin is located in the mounting cavity, and the outer peripheral surface of the part, located in the mounting cavity, of the electronic bin and the inner wall surface of the mounting cavity are distributed at intervals.
According to the utility model discloses an embodiment, displacement sensor still includes connecting portion, the one end of connecting portion with the electron storehouse links to each other, the other end of connecting portion with the sense terminal links to each other, the second pore includes: the first hole section is arranged on one side, close to the position of the cylinder barrel, of the mounting piece, and the connecting part is installed in the first hole section; the second hole section is arranged on one side, back to the position where the cylinder barrel is located, of the mounting piece, the radial size of the second hole section is larger than that of the electronic bin, and the outer peripheral surface of the electronic bin and the inner wall surface of the second hole section are distributed at intervals.
According to an embodiment of the invention, the radial dimension of the first bore section is smaller than the radial dimension of the second bore section.
According to the utility model discloses antidetonation sensor's hydro-cylinder still includes: a sensor seal disposed between the first bore section and the second bore section and between the mount and a side of the electronics compartment adjacent the location of the connection.
According to the utility model discloses an embodiment, the cylinder links to each other with cylinder bottom welding.
According to the utility model discloses an embodiment, the cylinder bottom with the earrings is integrated into one piece.
According to an embodiment of the invention, the mounting member is formed as a nut.
According to an embodiment of the invention, the nut is provided with an external thread connected with the cylinder bottom and an internal thread connected with the sensor.
According to the utility model discloses engineering machine tool of second aspect embodiment includes the hydro-cylinder with antidetonation sensor of any of the above-mentioned embodiment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a cross-sectional view of a prior art cylinder having a seismic sensor;
fig. 2 is a structural section view of an oil cylinder with an anti-vibration sensor according to an embodiment of the present invention.
Reference numerals:
a cylinder 100 having a shock-resistant sensor;
a cylinder barrel 10;
a cylinder bottom 20; a mounting member 21; a second porthole 211; a first bore section 212; a second bore section 213;
a piston rod 30; a first porthole 31;
a displacement sensor 40; an electronic compartment 41; a detection end 42; a connecting portion 43;
an ear ring 50;
a sensor seal 60.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The oil cylinder 100 having the anti-vibration sensor according to the embodiment of the present invention is an invention made by the inventor of the present application based on the following facts.
As shown in fig. 1, fig. 1 shows an existing oil cylinder with a split-type installation anti-seismic sensor, in a conventional installation manner of the oil cylinder, an ear ring and a cylinder bottom are generally selected to be processed and installed separately, and the ear ring and the cylinder bottom are connected by screws, but because the structure of the oil cylinder is compact and the matching length of an installation part is very short, the matching surface of the oil cylinder cannot bear high vibration under a high-vibration environment, screw fatigue is easily caused, the screws at the ear ring are broken to cause failure, and meanwhile, the sensor is used as an electronic component and needs to prevent water from entering, the matching surface between the ear ring and the cylinder bottom needs to be sealed additionally, flatness and smoothness of two planes need to be ensured, the processing requirement is high, so that the sensor water entering caused by the deformation of a welding plane of the cylinder bottom is caused due to poor performance of the matching installation between the cylinder bottom and the ear ring, meanwhile, the oil cylinder with the structure is of a split structure, the matching surface of the lug ring and the cylinder bottom is actually redundant waste materials, and the manufacturing cost of the oil cylinder is greatly increased, so that the oil cylinder structure which enables the oil cylinder to work stably in a high-vibration environment and prolongs the service life needs to be found under the condition of utilizing the reasonable layout of the structure.
Based on this, the inventors of the present application have conducted long-term creative efforts to arrive at the following inventions.
First, the oil cylinder 100 having the anti-vibration sensor according to an embodiment of the present invention will be described in detail.
As shown in fig. 2, the oil cylinder 100 with the anti-vibration sensor according to the embodiment of the present invention includes a cylinder tube 10, a cylinder bottom 20, a piston rod 30, a displacement sensor 40, and an ear ring 50.
Specifically, the cylinder 10 defines therein a first accommodation chamber having both ends open; one end of the cylinder bottom 20 is fixedly connected with one end of the cylinder barrel 10, and one side of the cylinder bottom 20, which is adjacent to the cylinder barrel 10, is defined with an open installation cavity; the piston rod 30 is arranged in the first accommodating cavity and can move along the axial direction of the first accommodating cavity, a first pore passage 31 extending along the axial direction of the piston rod 30 is arranged in the piston rod 30, and one end, adjacent to the cylinder bottom 20, of the first pore passage 31 is open and communicated with the mounting cavity; the electronic cabin 41 of the displacement sensor 40 is arranged in the mounting cavity, and at least a part of the detection end 42 of the displacement sensor 40 is inserted into the first hole channel 31; the lug 50 is arranged on the side of the cylinder bottom 20 facing away from the position of the cylinder barrel 10.
In other words, a first accommodating cavity is arranged inside the cylinder barrel 10, the cylinder barrel 10 and the cylinder bottom 20 are fixedly connected into a whole, dispersed parts in the cylinder are combined and tend to form a whole structure due to the whole structure formed by the fixedly connected cylinder bottom 20 and the cylinder barrel 10, the whole structure is arranged to enhance the adaptability of the cylinder 100 in a high-vibration environment, a mounting cavity is arranged between the cylinder bottom 20 and the cylinder barrel 10 and is used for mounting the electronic bin 41 part of the displacement sensor 40, the detection end 42 at the other end of the displacement sensor is inserted into a first hole channel 31 communicated with the mounting cavity, the first hole channel 31 is arranged inside the piston rod 30 and is communicated with the mounting cavity, and an ear ring 50 is arranged on the cylinder bottom 20 and is used for facilitating mounting connection.
From this, according to the utility model discloses hydro-cylinder 100 with shock-resistant sensor, through with the fixed back that links to each other of cylinder 10 and cylinder bottom 20, make it form overall structure, this overall structure is strong adaptability to the high vibration environment in components of a whole that can function independently structure, utilize the rigidity of steel itself to resist the vibrations of structure, the electronic bin 41 that will have displacement sensor 40 again sets up in the inside installation cavity of cylinder bottom 20, improves the not good problem of shock resistance performance in the use of displacement sensor 40 of installation in the hydro-cylinder among the traditional scheme, so, according to the utility model discloses a whole anti-seismic performance of hydro-cylinder with shock-resistant sensor strengthens, and its displacement monitoring is stable high-efficient simultaneously.
As shown in fig. 1, according to an embodiment of the present invention, the cylinder bottom 20 includes: the installed part 21, the open end of installation cavity is located to installed part 21, be equipped with on the installed part 21 and follow the second pore 211 that its thickness direction link up, the both ends of second pore 211 communicate with first pore 31 and installation cavity respectively, the one end that the adjacent cylinder 10 place of electron bin 41 belongs to the direction is located second pore 211, the one end that the electron bin 41 dorsad cylinder 10 place of direction is located the installation cavity, interval distribution between the outer peripheral face of the part that the electron bin 41 is located the installation cavity and the internal face of installation cavity.
That is to say, be equipped with in this hydro-cylinder by installed part 21 and with installed part 21 and the inside installation cavity of cylinder 10 fixed linking to each other, the inside electronic bin 41 that sets up of installation cavity part is not direct with the installation cavity internal wall face contact but leaves certain space, the design of this structure can effectively reduce the hydro-cylinder in the in-service use because the influence of structure vibrations to electronic bin 41, thereby it is less to make displacement sensor 40 vibrations influence, make whole displacement monitoring performance reach stable operating condition, the fixed structure of integral type simultaneously, also can and prolong displacement sensor 40's life.
The displacement sensor 40 further includes a connecting portion 43, one end of the connecting portion 43 is connected to the electronic chamber 41, the other end of the connecting portion 43 is connected to the detecting end 42, and the second hole 211 includes: the first hole section 212 is arranged on one side of the mounting part 21 close to the position of the cylinder barrel 10, and the connecting part 43 is arranged in the first hole section 212; the second hole section 213 is arranged on one side of the mounting part 21, which faces away from the position of the cylinder 10, the radial dimension of the second hole section 213 is larger than that of the electronic cabin 41, and the outer peripheral surface of the electronic cabin 41 and the inner wall surface of the second hole section 213 are distributed at intervals.
That is to say, one end of the displacement sensor 40 passes through the second pore passage 211, so that one end of the displacement sensor extends into the mounting cavity, and the other end of the displacement sensor extends into the first pore passage 31, meanwhile, the two pore passage structures arranged on the second pore passage 211 can effectively connect the displacement sensor 40, and can also enable the part of the electronic cabin 41 arranged in the mounting cavity not to directly contact with the inner wall surface of the mounting cavity but to leave a certain space, and the structural design can effectively reduce the influence of the oil cylinder on the electronic cabin 41 due to the vibration of the structural member in the actual use process.
Optionally, the radial dimension of the first bore section 212 is smaller than the radial dimension of the second bore section 213. The structural design is convenient to install and combine.
According to the utility model discloses an embodiment, hydro-cylinder 100 with antidetonation sensor still includes: and a sensor seal 60, the sensor seal 60 being disposed between the first bore section 212 and the second bore section 213 and between the side of the electronics compartment 41 adjacent to the location of the connection 43 and the mounting member 21. A sensor seal 60 is further arranged between the first hole section 212 and the second hole section 213, and the seal is arranged to effectively block hydraulic oil in the actual use process and prevent the hydraulic oil from invading into the installation cavity.
In some embodiments of the present invention, the cylinder barrel 10 is welded to the cylinder bottom 20. The cylinder bottom 20 and the cylinder barrel 10 are effectively fixed by the welded connection structure to form a whole, so that the anti-seismic performance of the oil cylinder is effectively improved.
According to an embodiment of the present invention, the cylinder bottom 20 and the ear ring 50 are integrally formed. The design of integrated into one piece's structure, the structure that aims at making whole hydro-cylinder inseparabler to make the hydro-cylinder form a whole reinforcing its shock resistance.
In some embodiments of the present invention, the mounting member 21 is formed as a nut. The mounting part 21 of the nut structure facilitates processing and assembling in the actual use process, meanwhile, the nut is low in manufacturing cost and high in combination performance, and the overall anti-seismic performance of the oil cylinder is further improved while the cost is effectively reduced.
In some embodiments of the present invention, the nut is provided with an external thread connected to the cylinder bottom 20 and an internal thread connected to the displacement sensor 40.
That is to say, during actual installation, the displacement sensor is screwed into the internal thread of the nut, and after the displacement sensor and the nut are assembled, the assembled integral part of the nut and the sensor is installed on the cylinder bottom, so that the assembly can be completed.
In a word, according to the utility model discloses hydro-cylinder 100 with antidetonation sensor, through with the fixed back that links to each other of cylinder 10 and cylinder bottom 20, make it form overall structure, this overall structure is to the strong adaptability of high vibrations environment in the components of a whole that can function independently structure, utilize the rigidity of steel itself to resist the vibrations of structure, will have displacement sensor 40 again and set up in the inside installation cavity of cylinder bottom 20, improve the displacement sensor 40 of installation in the hydro-cylinder in the traditional scheme problem that the anti-seismic performance is not good in the use.
Meanwhile, the installation part 21 is arranged in the oil cylinder and fixedly connects the installation part 21 with the installation cavity inside the cylinder barrel 10, the part, arranged inside the installation cavity, of the electronic bin 41 is not directly contacted with the inner wall surface of the installation cavity but leaves a certain space, the design of the structure can effectively reduce the influence of vibration of the oil cylinder on the electronic bin 41 due to the structural part in the actual use process, so that the vibration influence of the displacement sensor 40 is small, the whole displacement monitoring performance is stable in working state, and the service life of the displacement sensor 40 can be prolonged and prolonged through the integrated fixed structure.
According to the utility model discloses engineering machine tool includes the hydro-cylinder 100 with antidetonation sensor of above-mentioned embodiment, because according to the utility model discloses the hydro-cylinder 100 with antidetonation sensor has above-mentioned technological effect, consequently, according to the utility model discloses engineering machine tool also has above-mentioned technological effect, promptly in the use, this engineering machine tool equipment is simple, and the structure is exquisite and stable performance.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A cylinder with a shock-resistant sensor, comprising:
the cylinder barrel is internally limited with a first accommodating cavity with two open ends;
the cylinder bottom is fixedly connected with one end of the cylinder barrel, and an open installation cavity is defined at one side of the cylinder bottom, which is adjacent to the cylinder barrel;
the piston rod is arranged in the first accommodating cavity and can move along the axis direction of the first accommodating cavity, a first pore passage extending along the axis direction of the piston rod is arranged in the piston rod, and one end, adjacent to the cylinder bottom, of the first pore passage is open and communicated with the mounting cavity;
the electronic bin of the displacement sensor is arranged in the mounting cavity, and at least one part of the detection end of the displacement sensor is inserted into the first pore channel;
the earring is arranged on one side of the cylinder bottom back to the position of the cylinder barrel.
2. The hydro-cylinder with anti-seismic sensor of claim 1, wherein the cylinder bottom comprises:
the mounting part is arranged at the open end of the mounting cavity, a second channel which is communicated along the thickness direction of the mounting part is arranged on the mounting part, two ends of the second channel are respectively communicated with the first channel and the mounting cavity, one end, close to the cylinder barrel, of the electronic bin is located in the second channel, one end, back to the cylinder barrel, of the electronic bin is located in the mounting cavity, and the outer peripheral surface of the part, located in the mounting cavity, of the electronic bin and the inner wall surface of the mounting cavity are distributed at intervals.
3. The cylinder with the anti-seismic sensor according to claim 2, wherein the displacement sensor further comprises a connecting portion, one end of the connecting portion is connected to the electronic bin, the other end of the connecting portion is connected to the detection end, and the second hole comprises:
the first hole section is arranged on one side, close to the position of the cylinder barrel, of the mounting piece, and the connecting part is installed in the first hole section;
the second hole section is arranged on one side, back to the position where the cylinder barrel is located, of the mounting piece, the radial size of the second hole section is larger than that of the electronic bin, and the outer peripheral surface of the electronic bin and the inner wall surface of the second hole section are distributed at intervals.
4. The hydro-cylinder with the anti-seismic sensor of claim 3, wherein a radial dimension of the first bore section is smaller than a radial dimension of the second bore section.
5. The cylinder with the anti-seismic sensor according to claim 4, further comprising:
a sensor seal disposed between the first bore section and the second bore section and between the mount and a side of the electronics compartment adjacent the location of the connection.
6. The hydro-cylinder with anti-seismic sensor of claim 1, wherein the cylinder barrel is welded to the cylinder bottom.
7. The hydro-cylinder with anti-seismic sensor of claim 2, characterized in that the cylinder bottom and the ear ring are an integral molding.
8. The hydro-cylinder with anti-seismic sensor of claim 2, wherein the mount is formed as a nut.
9. The hydro-cylinder with anti-seismic sensor of claim 8, wherein said nut is provided with an external thread connected to a cylinder bottom and an internal thread connected to said sensor.
10. A working machine comprising a cylinder with a seismic sensor according to any of claims 1-9.
CN202021250565.2U 2020-06-30 2020-06-30 Oil cylinder and engineering machinery with anti-seismic sensor Active CN212615704U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021250565.2U CN212615704U (en) 2020-06-30 2020-06-30 Oil cylinder and engineering machinery with anti-seismic sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021250565.2U CN212615704U (en) 2020-06-30 2020-06-30 Oil cylinder and engineering machinery with anti-seismic sensor

Publications (1)

Publication Number Publication Date
CN212615704U true CN212615704U (en) 2021-02-26

Family

ID=74757583

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021250565.2U Active CN212615704U (en) 2020-06-30 2020-06-30 Oil cylinder and engineering machinery with anti-seismic sensor

Country Status (1)

Country Link
CN (1) CN212615704U (en)

Similar Documents

Publication Publication Date Title
CN212615704U (en) Oil cylinder and engineering machinery with anti-seismic sensor
US20080127764A1 (en) Ball Screw Device
CN211693050U (en) Floating type buffer hydraulic oil cylinder
CN106015418B (en) A kind of automotive towing arm bush
CN113818827B (en) Combined sealing structure and drilling jar
CN213512313U (en) Magnetic core tube for proportional electromagnet, proportional electromagnet and hydraulic structural part
CN212337932U (en) Combined bearing ring
CN113982906A (en) Sealing structure for valve box and valve cover of drilling pump
CN102943897B (en) Pneumatic diaphragm type automatic pressure-difference reversing valve
CN111520149B (en) Shield constructs quick-witted articulated auxiliary device
CN116379100A (en) Composite vibration isolator for electric cabinet of coal mining machine and manufacturing method thereof
CN115388072A (en) Pin shaft installation mechanism and heading machine
CN217522071U (en) Shell assembly of fuel cell and fuel cell with same
CN217129979U (en) Oil cylinder with quick oil guiding function
CN110273889B (en) Lifting oil cylinder of empty box vehicle
CN217842436U (en) Movable joint clamping fork seat of universal joint
CN216831936U (en) Floating connection structure of hydraulic cylinder of injection molding machine
CN218624615U (en) Power end housing and plunger pump
CN217347772U (en) Car three-way valve mounting structure
CN211468570U (en) Beam assembly for vehicle
CN214578942U (en) Gate valve ISO flange mounting structure
CN216553828U (en) Steering assembly for drilling system
CN212232174U (en) 360 unload grain action bars structure
CN214404470U (en) Ultra-short viscous fluid damper
CN215479335U (en) Tower crane's upper bracket and tower crane

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant