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CN113685413A - Corrosion-resistant and abrasion-resistant combined bolt for electric forklift - Google Patents

Corrosion-resistant and abrasion-resistant combined bolt for electric forklift Download PDF

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Publication number
CN113685413A
CN113685413A CN202111028419.4A CN202111028419A CN113685413A CN 113685413 A CN113685413 A CN 113685413A CN 202111028419 A CN202111028419 A CN 202111028419A CN 113685413 A CN113685413 A CN 113685413A
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CN
China
Prior art keywords
bolt
oil
resistant
groove
elastic sealing
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Pending
Application number
CN202111028419.4A
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Chinese (zh)
Inventor
李永超
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.)
Zhejiang Shengshi Ruijin Fastener Co ltd
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Zhejiang Shengshi Ruijin Fastener Co ltd
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Application filed by Zhejiang Shengshi Ruijin Fastener Co ltd filed Critical Zhejiang Shengshi Ruijin Fastener Co ltd
Priority to CN202111028419.4A priority Critical patent/CN113685413A/en
Publication of CN113685413A publication Critical patent/CN113685413A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/008—Corrosion preventing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; Insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

本发明公开了一种电动叉车用耐腐蚀防磨损组合螺栓，包括螺栓头、螺栓杆、缓冲凹槽、弹性密封圈、储油槽、输油管、导油环槽、导油直槽、限位弧块、弹性密封裙边和自封导气通道。本发明能够对组合螺栓进行长久的防锈润滑保护，降低组合螺栓腐蚀锈迹的情况，同时还能够对组合螺栓固定状态进行限位锁紧，预防螺栓松动导致的螺纹碰撞磨损，提升组合螺栓的使用寿命。

Figure 202111028419

The invention discloses a corrosion-resistant and wear-resistant composite bolt for an electric forklift, comprising a bolt head, a bolt rod, a buffer groove, an elastic sealing ring, an oil storage groove, an oil delivery pipe, an oil guide ring groove, an oil guide straight groove and a limit arc block , elastic sealing skirt and self-sealing air channel. The invention can carry out long-term anti-rust lubrication protection for the combined bolts, reduce the corrosion and rust of the combined bolts, and at the same time, can limit the fixed state of the combined bolts, prevent the thread collision and wear caused by the loose bolts, and improve the quality of the combined bolts. service life.

Figure 202111028419

Description

Corrosion-resistant and abrasion-resistant combined bolt for electric forklift
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of bolts, in particular to the technical field of a corrosion-resistant and abrasion-resistant combined bolt for an electric forklift.
[ background of the invention ]
The bolt is a fastener consisting of a head part and a screw rod, needs to be matched with a nut and is used for fastening and connecting two parts with through holes. This form of connection is known as a bolted connection. If the nut is unscrewed from the bolt, the two parts can be separated, so that the bolt connection belongs to detachable connection. The electric forklift is a forklift that operates electrically, and most of them operate as a battery. The accumulator is one of the batteries, and the accumulator can store limited electric energy and be used in a proper place. The working principle of the device is to convert chemical energy into electric energy. The storage battery is arranged in the storage battery of the electric forklift. Corrosion rust can appear in the long-time use of the composite bolt on the market, has greatly reduced the practicality of bolt, and composite bolt does not have suitable fastening limit structure moreover, if composite bolt is in not hard up state for a long time, can appear screw thread collision wearing and tearing and influence composite bolt's normal use, has the potential safety hazard.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides a corrosion-resistant and abrasion-resistant combined bolt for an electric forklift, which can be used for carrying out long-term rust-resistant lubrication protection on the combined bolt, reducing the situation that the combined bolt is corroded and rusted, and meanwhile, can be used for carrying out limiting locking on the fixed state of the combined bolt, preventing thread collision and abrasion caused by bolt loosening, and prolonging the service life of the combined bolt.
In order to achieve the purpose, the invention provides a corrosion-resistant and abrasion-resistant combined bolt for an electric forklift, which comprises a bolt head, a bolt rod, a buffer groove, an elastic sealing ring, an oil storage groove, an oil delivery pipe, an oil guide ring groove, an oil guide straight groove, a limiting arc block, an elastic sealing skirt edge and a self-sealing air guide channel, wherein the top of the bolt rod is connected with the bolt head, the buffer groove is annularly arranged at the connecting part of the bolt head and the bolt rod, the elastic sealing ring is arranged in the buffer groove, the oil storage groove is arranged in the bolt head, the bottom of the oil storage groove is provided with the oil delivery pipe extending to the middle part of the bolt rod, the oil guide ring groove is annularly arranged on the outer side surface of the middle part of the bolt rod, the oil delivery pipe is communicated with the oil guide ring groove, the outer side surface of the lower part of the bolt rod is provided with a plurality of oil guide straight grooves, the oil guide straight grooves are communicated with the oil guide ring groove, and the bottom of the bolt head is provided with a plurality of limiting arc blocks, the self-sealing air guide channel is characterized in that an elastic sealing skirt edge is embedded in the outer side face of the bottom of the bolt head, a self-sealing air guide channel connected with the inner side space of the elastic sealing skirt edge is arranged in the bolt head in a penetrating mode, and an air exhaust vacuum pump is detachably mounted at the opening position of the self-sealing air guide channel.
Preferably, the inner diameter of the buffer groove is smaller than the diameter of the top of the bolt rod, and the cross section of the buffer groove is in the shape of a circular arc.
Preferably, the cross section of the elastic sealing ring is in the shape of a circular arc, the outer side of the elastic sealing ring is a smooth plane inclined to the inner side, and the maximum outer diameter of the elastic sealing ring is larger than the diameter of the top of the bolt rod.
Preferably, an oil absorption sponge is clamped in the oil guide ring groove, and the oil conveying pipes are uniformly arranged along the axis of the bolt rod.
Preferably, the number of the oil guide straight grooves is multiple, the oil guide straight grooves are uniformly and axially distributed on the outer side surface of the lower part of the bolt rod, and the cross section of each oil guide straight groove is in a semi-circular arc shape.
Preferably, the bottom of the elastic sealing skirt is uniformly provided with a plurality of branch skirts in a surrounding manner, and the edge of the elastic sealing skirt is obliquely arranged.
Preferably, the number of the limiting arc blocks is multiple, the height of the limiting arc blocks is lower than that of the elastic sealing skirt, and the limiting arc blocks are uniformly distributed on the inner side of the elastic sealing skirt in a surrounding mode.
The invention has the beneficial effects that: according to the invention, the bolt head, the bolt rod, the buffer groove, the elastic sealing ring, the oil storage tank, the oil delivery pipe, the oil guide ring groove, the oil guide straight groove, the limiting arc block, the elastic sealing skirt edge and the self-sealing air guide channel are combined together, so that through test optimization, long-term rust-proof lubrication protection can be performed on the combined bolt, the corrosion and rust condition of the combined bolt is reduced, meanwhile, the fixed state of the combined bolt can be limited and locked, the collision and abrasion of threads caused by the loosening of the bolt can be prevented, and the service life of the combined bolt is prolonged.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a corrosion-resistant and abrasion-resistant combination bolt for an electric forklift truck according to the present invention;
fig. 2 is a schematic bottom view of the corrosion-resistant and abrasion-resistant combination bolt for the electric forklift.
In the figure: the bolt comprises a bolt head 1, a bolt rod 2, a buffer groove 3, an elastic sealing ring 4, an oil storage groove 5, an oil conveying pipe 6, an oil guide ring groove 7, an oil guide straight groove 8, a limiting arc block 9, an elastic sealing skirt edge 10, a self-sealing air guide channel 11 and a branch skirt edge 12.
[ detailed description ] embodiments
Referring to fig. 1 and 2, the corrosion-resistant and abrasion-resistant combination bolt for the electric forklift comprises a bolt head 1, a bolt rod 2, a buffer groove 3, an elastic sealing ring 4, an oil storage groove 5, an oil delivery pipe 6, an oil guide ring groove 7, an oil guide straight groove 8, a limiting arc block 9, an elastic sealing skirt 10 and a self-sealing air guide channel 11, wherein the top of the bolt rod 2 is connected with the bolt head 1, the buffer groove 3 is annularly arranged at the connecting part of the bolt head 1 and the bolt rod 2, the elastic sealing ring 4 is arranged in the buffer groove 3, the oil storage groove 5 is arranged in the bolt head 1, the oil delivery pipe 6 extending to the middle part of the bolt rod 2 is arranged at the bottom of the oil storage groove 5, the oil guide ring groove 7 is annularly arranged on the outer side surface of the middle part of the bolt rod 2, the oil delivery pipe 6 is communicated with the oil guide ring groove 7, and a plurality of oil guide straight grooves 8 are arranged on the outer side surface of the lower part of the bolt rod 2, the oil guide straight groove 8 is communicated with an oil guide annular groove 7, a plurality of limiting arc blocks 9 are arranged at the bottom of the bolt head 1, an elastic sealing skirt edge 10 is inlaid on the outer side surface of the bottom of the bolt head 1, an air guide channel 11 is arranged in the bolt head 1 in a penetrating manner and is connected with the inner side space of the elastic sealing skirt edge 10 in a self-sealing manner, an air suction vacuum pump is detachably arranged at the opening position of the air guide channel 11 in a self-sealing manner, the inner diameter of the buffering groove 3 is smaller than the top diameter of the bolt rod 2, the cross section shape of the buffering groove 3 is arc-shaped, the cross section shape of the elastic sealing ring 4 is arc-shaped, the outer side of the elastic sealing ring 4 is arranged to be a smooth plane inclined inwards, the maximum outer diameter of the elastic sealing ring 4 is larger than the top diameter of the bolt rod 2, an oil absorption sponge is arranged in the oil guide annular groove 7 in a clamping manner, and the oil delivery pipe 6 is uniformly arranged along the axis of the bolt rod 2, lead the quantity of oil straight flute 8 to have a plurality ofly, lead the even axial distribution of oil straight flute 8 at the lower part lateral surface of shank of bolt 2, the shape of cross section of leading oil straight flute 8 is half-circular arc, the bottom of elastic seal shirt rim 10 evenly encircles and is provided with a plurality of branch shirt rims 12, the slope of border of elastic seal shirt rim 10 sets up, the quantity of spacing arc piece 9 has a plurality ofly, the height that highly is less than elastic seal shirt rim 10 of spacing arc piece 9, spacing arc piece 9 evenly encircles and distributes at elastic seal shirt rim 10 inboardly.
According to the invention, the bolt head 1, the bolt rod 2, the buffer groove 3, the elastic sealing ring 4, the oil storage tank 5, the oil delivery pipe 6, the oil guide ring groove 7, the oil guide straight groove 8, the limiting arc block 9, the elastic sealing skirt 10 and the self-sealing air guide channel 11 are combined together, so that through test optimization, long-term rust-proof lubrication protection can be performed on the combined bolt, the corrosion and rust corrosion situation of the combined bolt is reduced, meanwhile, the fixed state of the combined bolt can be limited and locked, the thread collision and abrasion caused by bolt loosening are prevented, and the service life of the combined bolt is prolonged.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims (7)

1.一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：包括螺栓头(1)、螺栓杆(2)、缓冲凹槽(3)、弹性密封圈(4)、储油槽(5)、输油管(6)、导油环槽(7)、导油直槽(8)、限位弧块(9)、弹性密封裙边(10)和自封导气通道(11)，所述螺栓杆(2)的顶部连接有螺栓头(1)，所述螺栓头(1)和螺栓杆(2)的连接部位环设有缓冲凹槽(3)，所述缓冲凹槽(3)内设置有弹性密封圈(4)，所述螺栓头(1)内设置有储油槽(5)，所述储油槽(5)的底部设置有延伸到螺栓杆(2)中部的输油管(6)，所述螺栓杆(2)的中部外侧面环设有导油环槽(7)，所述输油管(6)与导油环槽(7)相连通，所述螺栓杆(2)的下部外侧面设置有若干导油直槽(8)，所述导油直槽(8)与导油环槽(7)相连通，所述螺栓头(1)的底部设置有若干限位弧块(9)，所述螺栓头(1)的底部外侧面镶嵌设置有弹性密封裙边(10)，所述螺栓头(1)内贯穿设置有弹性密封裙边(10)内侧空间相连的自封导气通道(11)，所述自封导气通道(11)的开口位置可拆卸安装有抽气真空泵。1. A corrosion-resistant and wear-resistant composite bolt for an electric forklift truck, characterized in that it comprises a bolt head (1), a bolt rod (2), a buffer groove (3), an elastic sealing ring (4), and an oil storage tank (5) , oil pipeline (6), oil guide ring groove (7), oil guide straight groove (8), limit arc block (9), elastic sealing skirt (10) and self-sealing air guide channel (11), the bolt rod A bolt head (1) is connected to the top of the (2), and a buffer groove (3) is formed around the connection part of the bolt head (1) and the bolt rod (2), and a buffer groove (3) is provided in the buffer groove (3). An elastic sealing ring (4), an oil storage tank (5) is arranged in the bolt head (1), and an oil delivery pipe (6) extending to the middle of the bolt rod (2) is arranged at the bottom of the oil storage tank (5). An oil guide ring groove (7) is provided around the middle outer side of the bolt rod (2), the oil delivery pipe (6) is communicated with the oil guide ring groove (7), and the lower outer side of the bolt rod (2) is provided with an oil guide ring groove (7). A plurality of oil guiding straight grooves (8), the oil guiding straight groove (8) is communicated with the oil guiding ring groove (7), and the bottom of the bolt head (1) is provided with a plurality of limit arc blocks (9), so The bottom outer side of the bolt head (1) is inlaid with an elastic sealing skirt (10), and a self-sealing air guide channel (11) connected to the inner space of the elastic sealing skirt (10) is arranged through the bolt head (1). , the opening position of the self-sealing air guide channel (11) is detachably installed with an air-pumping vacuum pump. 2.如权利要求1所述的一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：所述缓冲凹槽(3)的内直径小于螺栓杆(2)的顶部直径，所述缓冲凹槽(3)的横截面形状为圆弧形。2. The corrosion-resistant and wear-resistant composite bolt for an electric forklift according to claim 1, characterized in that: the inner diameter of the buffer groove (3) is smaller than the top diameter of the bolt rod (2), and the buffer groove (3) is smaller than the top diameter of the bolt rod (2). The cross-sectional shape of the groove (3) is a circular arc. 3.如权利要求1所述的一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：所述弹性密封圈(4)的的横截面形状为圆弧形，所述弹性密封圈(4)的外侧设置为斜向内侧倾斜的光滑平面，所述弹性密封圈(4)的最大外直径大于螺栓杆(2)的顶部直径。3. The corrosion-resistant and wear-resistant composite bolt for an electric forklift as claimed in claim 1, characterized in that: the cross-sectional shape of the elastic sealing ring (4) is an arc shape, and the elastic sealing ring (4) The outer side of ) is set as a smooth plane inclined to the inner side, and the maximum outer diameter of the elastic sealing ring (4) is larger than the top diameter of the bolt rod (2). 4.如权利要求1所述的一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：所述导油环槽(7)内夹设有吸油海绵，所述输油管(6)沿螺栓杆(2)的轴线均匀设置。4. The corrosion-resistant and wear-resistant composite bolt for an electric forklift as claimed in claim 1, characterized in that: an oil-absorbing sponge is sandwiched in the oil-guiding ring groove (7), and the oil-conveying pipe (6) is along the bolt rod. (2) The axes are evenly arranged. 5.如权利要求1所述的一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：所述导油直槽(8)的数量有多个，所述导油直槽(8)均匀轴向分布在螺栓杆(2)的下部外侧面，所述导油直槽(8)的横截面形状为半圆弧形。5. The corrosion-resistant and wear-resistant composite bolt for an electric forklift according to claim 1, characterized in that: the number of the straight oil guiding grooves (8) is plural, and the straight oil guiding grooves (8) are uniform Axially distributed on the lower outer side surface of the bolt rod (2), the cross-sectional shape of the oil guiding straight groove (8) is a semi-circular arc. 6.如权利要求1所述的一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：所述弹性密封裙边(10)的底部均匀环绕设置有多个分支裙边(12)，所述弹性密封裙边(10)的边沿倾斜设置。6. The corrosion-resistant and wear-resistant composite bolt for an electric forklift truck according to claim 1, characterized in that: the bottom of the elastic sealing skirt (10) is evenly provided with a plurality of branch skirts (12), so The edge of the elastic sealing skirt (10) is arranged obliquely. 7.如权利要求1所述的一种电动叉车用耐腐蚀防磨损组合螺栓，其特征在于：所述限位弧块(9)的数量有多个，所述限位弧块(9)的高度低于弹性密封裙边(10)的高度，所述限位弧块(9)均匀环绕分布在弹性密封裙边(10)内侧。7. The corrosion-resistant and wear-resistant composite bolt for an electric forklift as claimed in claim 1, wherein the number of said limit arc blocks (9) is plural, and the number of said limit arc blocks (9) The height is lower than the height of the elastic sealing skirt (10), and the limiting arc blocks (9) are evenly distributed around the inner side of the elastic sealing skirt (10).
CN202111028419.4A 2021-09-02 2021-09-02 Corrosion-resistant and abrasion-resistant combined bolt for electric forklift Pending CN113685413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111028419.4A CN113685413A (en) 2021-09-02 2021-09-02 Corrosion-resistant and abrasion-resistant combined bolt for electric forklift

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Application Number Priority Date Filing Date Title
CN202111028419.4A CN113685413A (en) 2021-09-02 2021-09-02 Corrosion-resistant and abrasion-resistant combined bolt for electric forklift

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1046456A (en) * 1961-11-29 1966-10-26 Morning Croydon Ltd Improvements in and relating to washers and the like
CN201902418U (en) * 2010-10-14 2011-07-20 上海华伦仪表电子有限公司 Bolt with leakproof function
CN204186739U (en) * 2014-01-26 2015-03-04 浙江精艺标准件有限公司 With the blank bolt of bed material
CN206539588U (en) * 2017-03-02 2017-10-03 山东科技大学 Novel bolt
CN207080480U (en) * 2017-08-25 2018-03-09 温州市大炜标准件有限公司 A kind of bolt
CN111706599A (en) * 2020-05-29 2020-09-25 江苏永昊高强度螺栓有限公司 Bolt with lubricating function
CN213684882U (en) * 2020-11-25 2021-07-13 嘉善嘉瑞精密五金科技股份有限公司 High leakproofness's brill tail screw

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1046456A (en) * 1961-11-29 1966-10-26 Morning Croydon Ltd Improvements in and relating to washers and the like
CN201902418U (en) * 2010-10-14 2011-07-20 上海华伦仪表电子有限公司 Bolt with leakproof function
CN204186739U (en) * 2014-01-26 2015-03-04 浙江精艺标准件有限公司 With the blank bolt of bed material
CN206539588U (en) * 2017-03-02 2017-10-03 山东科技大学 Novel bolt
CN207080480U (en) * 2017-08-25 2018-03-09 温州市大炜标准件有限公司 A kind of bolt
CN111706599A (en) * 2020-05-29 2020-09-25 江苏永昊高强度螺栓有限公司 Bolt with lubricating function
CN213684882U (en) * 2020-11-25 2021-07-13 嘉善嘉瑞精密五金科技股份有限公司 High leakproofness's brill tail screw

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Application publication date: 20211123

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