CN116219804A - Novel bolt-free fastener - Google Patents

Novel bolt-free fastener Download PDF

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Publication number
CN116219804A
CN116219804A CN202310335525.XA CN202310335525A CN116219804A CN 116219804 A CN116219804 A CN 116219804A CN 202310335525 A CN202310335525 A CN 202310335525A CN 116219804 A CN116219804 A CN 116219804A
Authority
CN
China
Prior art keywords
sleeper
fastener
elastic strip
bolt
positioning groove
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.)
Pending
Application number
CN202310335525.XA
Other languages
Chinese (zh)
Inventor
刘惠敏
尉大业
邵缇
王峰
于定海
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.)
CENTRAL PLAINS LEADER RAILWAY TRACK TECHNOLOGY DEVELOPMENT CO LTD
Original Assignee
CENTRAL PLAINS LEADER RAILWAY TRACK TECHNOLOGY DEVELOPMENT 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 CENTRAL PLAINS LEADER RAILWAY TRACK TECHNOLOGY DEVELOPMENT CO LTD filed Critical CENTRAL PLAINS LEADER RAILWAY TRACK TECHNOLOGY DEVELOPMENT CO LTD
Publication of CN116219804A publication Critical patent/CN116219804A/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/38—Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs
    • E01B9/58—Fastening the rail in the chair
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/38—Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs
    • E01B9/54—Rail chairs
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B9/00—Fastening rails on sleepers, or the like
    • E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
    • E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)

Abstract

The invention discloses a novel bolt-free fastener, which comprises steel rails arranged on a sleeper, wherein bolt-free buckling structures for fixing the steel rails on the sleeper are symmetrically arranged on the left side and the right side of the steel rails, each bolt-free buckling structure comprises a pre-buried iron seat, a spring strip and a mounting sleeve, and the bolt-free buckling structures comprise: the embedded iron seat is embedded and fixed in the sleeper, a positioning groove is formed in the part of the embedded iron seat on the sleeper, and the positioning groove is arranged in the horizontal direction; the mounting sleeve is horizontally arranged in the positioning groove and is in clamping fit with the positioning groove; the elastic strip is of an omega-shaped symmetrical structure and is provided with a middle circular arc and a tail part, the tail part is reversely bent towards the middle, the tail part of the elastic strip is inserted into the mounting sleeve through an opening of the mounting sleeve, and the middle circular arc of the elastic strip is used for compacting a steel rail. The component composition of the bolt-free fastener completely abandons the design form of the existing fastener, is more convenient to mount and dismount, is more convenient for later-stage line maintenance, and avoids difficult maintenance and replacement caused by rust or collision of the threaded part of the bolt.

Description

Novel bolt-free fastener
Technical Field
The invention relates to the technical field of railway engineering, in particular to a novel bolt-free fastener.
Background
Classification of fasteners: the fasteners are of two types, namely wood sleeper fasteners and concrete sleeper fasteners, according to the sleeper laid. The fasteners can be categorized according to their structure by the snap fastener elements: rigidity and elasticity; the sleeper is distinguished according to the sleeper structure: a blocking shoulder and a non-blocking shoulder are arranged; the sleeper, the backing plate and the buckling piece are distinguished according to the connection mode: non-split and split; distinguishing according to sleeper: there are wooden sleeper fasteners and concrete sleeper fasteners. The railway of China is paved with the fasteners of various types.
In the subway track independently developed in China, a plurality of conventional fasteners, DT series fasteners, WJ series fasteners, spring fasteners and damping fasteners are adopted, the structural form of bolt fastening elastic strips is basically adopted, as the service life of the fasteners is prolonged, corrosion of metal parts is inevitably and gradually aggravated, the phenomenon that the threaded parts of bolt parts fail due to corrosion is frequent, and inconvenience is brought to maintenance and replacement.
For this reason, the applicant applied for a bolt-free high-speed railway fastener (bulletin number CN 215629046U) in 2022, 1 and 25, and tried to solve the problems of the conventional bolt fastener. Although the efficiency of installation dismantlement has been improved to a certain extent to this technical scheme, the design thinking of this fastener still relies on the structure of current fastener, and the component part does not break away from current design completely, leads to its thinking of no bolt to not develop very well.
Therefore, the applicant continues to develop a novel bolt-free fastener, and the novel bolt-free fastener is more convenient to mount and dismount and more convenient to maintain a later-stage line.
Disclosure of Invention
The invention provides a novel bolt-free fastener for solving the problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a novel no bolt fastener, is equipped with the rail lower bolster including arranging the rail on the sleeper between rail and the sleeper to the extending direction of rail is fore-and-aft direction, the left and right sides symmetrical arrangement of rail has the no bolt of fixing the rail at the sleeper withhold the structure, and no bolt withholds the structure and includes pre-buried iron seat, bullet strip and installation cover, wherein:
the embedded iron seat is embedded and fixed in the sleeper, a positioning groove is formed in the part of the embedded iron seat on the sleeper, and the positioning groove is arranged in the horizontal direction; the positioning groove is provided with two ends in the horizontal direction, one end is closed, the other end is open, and the opening is opposite to the steel rail;
the mounting sleeve is horizontally arranged in the positioning groove and is in clamping fit with the positioning groove; the mounting sleeve is hollow, two ends are arranged in the horizontal direction, one end is closed, the other end is open, and the opening faces away from the steel rail;
the elastic strip is of an omega-shaped symmetrical structure and is provided with a middle circular arc and a tail part, the tail part is reversely bent towards the middle part, the tail part of the elastic strip is inserted into the mounting sleeve through an opening of the mounting sleeve, and the middle circular arc of the elastic strip is used for pressing a steel rail;
an insulating block is arranged between the steel rail and the embedded iron seat, and the upper side of the insulating block is limited by the elastic strip.
Further, the embedded iron seat comprises a seat body part and a fixing part, wherein the seat body part is used as a part on the sleeper; the fixing part extends downwards and is embedded in the sleeper;
the pedestal part is provided with a cuboid groove extending in the front-back direction, the middle part of the cuboid groove is hollow, one end of the cuboid groove opposite to the steel rail is open, and the front side and the rear side of the cuboid groove are provided with U-shaped surrounding supporting structures to form the positioning groove.
Further, the fixing part is provided with a double-barb structure.
Further, the seat body of the embedded iron seat is provided with limiting plates at the front and rear positions facing one side of the steel rail respectively, and the limiting plates extend to one side of the steel rail.
Further, the limiting plate is a vertical plate structure.
Further, the mounting sleeve is made of polyamide 66.
Further, the tail and the middle arc of the spring strip are in transition through the tail arc, and the tail arc is a structure which is bent upwards and then bent downwards.
Further, two buckling and pressing limbs of the elastic strip are formed at the transition position of the arc in the middle of the elastic strip to the arc at the tail of the elastic strip, and the two buckling and pressing limbs are used for pressing the insulating block.
Furthermore, the upper side of the tail part of the elastic strip is set to be a plane, and a bulge is arranged on the plane.
Further, the protrusions are of a sharp corner structure.
The invention has the beneficial effects that:
1. the component composition of the bolt-free fastener completely abandons the design form of the existing fastener, is more convenient to mount and dismount, is more convenient for later-stage line maintenance, and simultaneously avoids difficult maintenance and replacement caused by rust or collision of the threaded part of the bolt.
2. The embedded iron seat has a simple structure and is convenient to install and position.
The base body of the embedded iron base adopts a cuboid groove structure, and U-shaped surrounding supporting structures are arranged on the front side and the rear side of the base body, so that the strength is very high, the connection of the installation sleeve and the elastic strip therein can be ensured, and the bearing capacity and the safety of the fastener are further ensured. The seat body is provided with limiting plates at the front and rear positions of one side facing the steel rail respectively, so as to play a role in installing, positioning and fastening the insulating block.
The fixed part of the embedded iron seat is provided with a double-barb structure, so that the installation of the embedded iron seat in the sleeper becomes easy and accurate.
3. The mounting sleeve is mounted in the pre-buried positioning groove of the iron burying seat and is matched with the elastic strip, so that the elastic strip is fixed.
4. The elastic strip is of an omega-shaped symmetrical structure, is free from the existing elastic strip design, is more suitable for a bolt-free buckling structure, is more convenient to install and detach, and has a good effect of compacting and fixing the steel rail.
The middle circular arc of the elastic strip forms two buckling and pressing limbs of the elastic strip to the transition position of the tail circular arc, the two buckling and pressing limbs are used for compressing the insulating block, the elastic strip simultaneously fixes the insulating block, and the installation and the fastening of the insulating block are convenient.
Drawings
FIG. 1 is a perspective view of the entirety of an embodiment of the present invention;
FIG. 2 is a front view of the entirety of an embodiment of the present invention;
FIG. 3 is a top view of the entirety of an embodiment of the present invention;
FIG. 4 is a perspective view of an embedded iron seat in an embodiment of the present invention;
FIG. 5 is a front view of an embedded iron seat in an embodiment of the present invention;
FIG. 6 is a right side view of the pre-buried iron seat in an embodiment of the present invention;
FIG. 7 is a top view of an embedded iron seat in an embodiment of the present invention;
FIG. 8 is a perspective view of a nylon sleeve in an embodiment of the present invention;
FIG. 9 is a side view of a nylon sleeve in an embodiment of the present invention;
FIG. 10 is a perspective view of a spring strip in an embodiment of the present invention;
FIG. 11 is a front view of a spring strip in an embodiment of the present invention;
fig. 12 is a top view of a spring strip in an embodiment of the invention.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1 to 12, this embodiment provides a novel bolt-free fastener, including arranging rail 5 on sleeper 4, regard the extending direction of rail 5 as the fore-and-aft direction, the left and right sides symmetry of rail 5 has been arranged and has been fixed the bolt-free structure of buckling at the sleeper with the rail, and bolt-free structure of buckling includes pre-buried iron seat 1, installation cover 2 and bullet strip 3. An insulating block 6 is also arranged between the steel rail 5 and the embedded iron seat 1.
The embedded iron seat 1 is embedded and fixed in the sleeper 4, and a positioning groove is formed in the part of the embedded iron seat 1 on the sleeper 4 and is arranged in the horizontal direction; the positioning groove is provided with two ends in the horizontal direction, one end is closed, the other end is open, and the opening of the positioning groove is back to the steel rail 5.
In this embodiment, the embedded iron seat 1 includes a seat body 11 and a fixing portion 12, where the seat body 11 is used as a portion on the sleeper; the fixing portion 12 extends downward, and the fixing portion 12 is embedded in the sleeper.
The pedestal 11 is provided with a cuboid groove 13 extending in the front-back direction, the middle of the cuboid groove 13 is hollow, one end of the cuboid groove, which is opposite to the steel rail 5, is open, and the front side and the back side of the cuboid groove 13 are provided with U-shaped surrounding supporting structures 14 to form positioning grooves.
The seat body 11 of the embedded iron seat 1 is respectively provided with a limiting plate 15 at the front and back positions facing to one side of the steel rail, and the limiting plates 15 extend to one side of the steel rail 5 to play a role in installing, positioning and fastening the insulating block 6. Specifically, the limiting plate 15 is selected as a standing plate structure.
The fixing part 12 is provided with a double-barb structure 16, so that the installation of the embedded iron seat 1 in the sleeper 4 becomes easy and accurate.
The base body 11 of the embedded iron base 1 adopts a cuboid groove structure, and U-shaped surrounding supporting structures 14 are arranged on the front side and the rear side of the base body 11, so that the strength is high, the connection of the mounting sleeve 2 and the elastic strip 3 can be ensured, and the bearing capacity and the safety of the fastener can be further ensured.
In the embodiment, the material of the embedded iron seat 1 is QT450-10, and the conversion rate of the embedded iron seat ball 1 is not less than level 3.
The mounting sleeve 2 is horizontally arranged in the positioning groove and is matched with the positioning groove in a clamping way; the inside of the installation sleeve 2 is hollow, two ends are arranged in the horizontal direction, one end is closed, the other end is open, and the opening faces away from the steel rail 5.
In this embodiment, the mounting sleeve 2 has a rectangular parallelepiped structure with a hollow interior.
The mounting sleeve 2 is made of polyamide 66. After the nylon sleeve is boiled in water at 100 ℃ for 2 hours, the insulation resistance is improved>10 8 Omega. The mounting sleeve 2 should be subjected to water absorption modulation. The water drainage rate of the installation sleeve after water absorption modulation is not less than 0.5%. The nylon sleeve 2 cannot be broken after impact test at the temperature of 20+/-5 ℃.
When in use, the mounting sleeve 2 is mounted in the pre-buried positioning groove of the iron burying seat and is matched with the elastic strip to fix the elastic strip
The elastic strip 3 is of an omega-shaped symmetrical structure and is provided with a middle circular arc 31 and a tail 32, the tail 32 is reversely bent towards the middle, the tail 32 of the elastic strip 3 is inserted into the mounting sleeve through an opening of the mounting sleeve 2, and the middle circular arc 31 of the elastic strip is used for pressing the steel rail 5.
The tail 32 and the middle arc 31 of the spring strip 3 are transited through the tail arc 33, and the tail arc 33 is a structure which is bent upwards and then downwards.
In the embodiment, the diameter of the elastic strip is 13mm, the arc 31 in the middle of the elastic strip is R150mm, and the arc at the tail of the elastic strip is R90mm. The minimum distance between the two tail circular arcs 33 is 10mm.
The middle circular arc 31 of the elastic strip 3 forms two buckling and pressing limbs 34 of the elastic strip at the transition position of the tail circular arc 32, the two buckling and pressing limbs 34 are used for compressing the insulating block 6, the elastic strip 3 simultaneously fixes the insulating block 6, and the installation and the fastening of the insulating block are convenient.
The upper side of the tail part 32 of the spring strip 3 is provided with a plane, and the plane is provided with a bulge 35, and the bulge 35 is in a sharp angle structure. The arrangement of the plane and the bulge 35 can strengthen the connection stability between the tail part of the elastic strip and the mounting sleeve.
According to the embodiment, the elastic strip 3 adopts an omega-shaped symmetrical structure, so that the existing elastic strip design is eliminated, the structure is more suitable for a screwless buckling structure, the installation and the disassembly are more convenient, and the effect of compacting and fixing the steel rail is good.
In this embodiment, a rail pad 7 is also provided between the rail 5 and the tie 4.
The screwless fastener of this embodiment is installed in the following order when in use.
(1) The embedded iron seat 1 is embedded in the sleeper 4;
(2) Laying a rail lower backing plate 7, and then laying a steel rail 5;
(3) An insulating block 4 is arranged between the steel rail 5 and the embedded iron seat 1 according to the configuration table;
(4) A mounting sleeve 2 is arranged in a positioning groove of the embedded iron seat 1;
(5) The elastic strip 3 is installed by a special tool, the tail 32 of the elastic strip 3 is inserted into the installation sleeve by the opening of the installation sleeve 2, and the arc 31 in the middle of the elastic strip compresses the steel rail 5.
After the fastener of the embodiment is installed, the following requirements are satisfied: fastener gauge adjustment: 8mm to +8mm (gauge adjustment depends on the insulation block). The insulation resistance value of the fastener node is not less than 10 8 Omega. Each group of fastener steel rail anti-climbing resistance: 6 kN/group. Fastener fatigue performance: under the condition of designed load (vertical load of 63kN and transverse load of 30kN at each fastener node), 300 ten thousand fatigue tests pass, each part of the fastener cannot be damaged, and the track gauge is enlarged<6mm; and the buckling force, the steel rail longitudinal resistance and the node static rigidity should meet the following requirements: buckle pressure change: less than or equal to 20 percent, and the longitudinal resistance of the steel rail changes: less than or equal to 20 percent, node static rigidity change: less than or equal to 25 percent. When the fastener is assembled in a standard state, the buckling pressure generated by the elastic strip is not less than 6kN.
The bolt-free fastener of the embodiment is used for lines of subways, light rails, trams and the like, and the design speed per hour is not more than 140km/h.
The component composition of the bolt-free fastener of the embodiment completely abandons the design form of the existing fastener, is more convenient to mount and dismount, is more convenient for later-stage line maintenance, and simultaneously avoids maintenance and replacement difficulties caused by rust or collision of the threaded part of the bolt.
The above embodiments are only for illustrating the technical solution of the present invention, and it should be understood by those skilled in the art that although the present invention has been described in detail with reference to the above embodiments: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, which is intended to be encompassed by the claims.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.
In the description of the present invention, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Claims (10)

1. The utility model provides a novel no bolt fastener, includes the rail of arranging on the sleeper, is equipped with the rail lower bolster between rail and the sleeper to the extending direction of rail is fore-and-aft direction, its characterized in that: the left and right sides symmetrical arrangement of rail has the structure of withholding of no bolt of fixing the rail at the sleeper, and the structure of withholding of no bolt includes pre-buried iron seat, bullet strip and installation cover, wherein:
the embedded iron seat is embedded and fixed in the sleeper, a positioning groove is formed in the part of the embedded iron seat on the sleeper, and the positioning groove is arranged in the horizontal direction; the positioning groove is provided with two ends in the horizontal direction, one end is closed, the other end is open, and the opening is opposite to the steel rail;
the mounting sleeve is horizontally arranged in the positioning groove and is in clamping fit with the positioning groove; the mounting sleeve is hollow, two ends are arranged in the horizontal direction, one end is closed, the other end is open, and the opening faces away from the steel rail;
the elastic strip is of an omega-shaped symmetrical structure and is provided with a middle circular arc and a tail part, the tail part is reversely bent towards the middle part, the tail part of the elastic strip is inserted into the mounting sleeve through an opening of the mounting sleeve, and the middle circular arc of the elastic strip is used for pressing a steel rail;
an insulating block is arranged between the steel rail and the embedded iron seat, and the upper side of the insulating block is limited by the elastic strip.
2. The novel screwless fastener of claim 1, wherein: the embedded iron seat comprises a seat body part and a fixing part, wherein the seat body part is used as a part on the sleeper; the fixing part extends downwards and is embedded in the sleeper;
the pedestal part is provided with a cuboid groove extending in the front-back direction, the middle part of the cuboid groove is hollow, one end of the cuboid groove opposite to the steel rail is open, and the front side and the rear side of the cuboid groove are provided with U-shaped surrounding supporting structures to form the positioning groove.
3. The novel screwless fastener of claim 2, wherein: the fixing part is provided with a double-barb structure.
4. The novel screwless fastener of claim 2, wherein: the seat body of the embedded iron seat is provided with limiting plates at the front and rear positions facing one side of the steel rail respectively, and the limiting plates extend to one side of the steel rail.
5. The novel screwless fastener of claim 4, wherein: the limiting plate is a vertical plate structure.
6. The novel screwless fastener of claim 1, wherein: the mounting sleeve is made of polyamide 66.
7. The novel screwless fastener of claim 1, wherein: the tail and middle circular arcs of the spring strip are in transition through the tail circular arcs, and the tail circular arcs are of structures which are bent upwards and then bent downwards.
8. The novel screwless fastener of claim 7, wherein: the middle circular arc of the elastic strip is in transition with the tail circular arc to form two buckling and pressing limbs of the elastic strip, and the two buckling and pressing limbs are used for compressing the insulating block.
9. The novel screwless fastener of claim 7, wherein: the upper side of the tail part of the elastic strip is set to be a plane, and a bulge is arranged on the plane.
10. The novel screwless fastener of claim 9, wherein: the bulges are in sharp corner structures.
CN202310335525.XA 2023-01-13 2023-03-31 Novel bolt-free fastener Pending CN116219804A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202310040008 2023-01-13
CN202310040008X 2023-01-13

Publications (1)

Publication Number Publication Date
CN116219804A true CN116219804A (en) 2023-06-06

Family

ID=86571424

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310335525.XA Pending CN116219804A (en) 2023-01-13 2023-03-31 Novel bolt-free fastener

Country Status (1)

Country Link
CN (1) CN116219804A (en)

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