WO2018035961A1 - 链条保护装置 - Google Patents

链条保护装置 Download PDF

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Publication number
WO2018035961A1
WO2018035961A1 PCT/CN2016/103938 CN2016103938W WO2018035961A1 WO 2018035961 A1 WO2018035961 A1 WO 2018035961A1 CN 2016103938 W CN2016103938 W CN 2016103938W WO 2018035961 A1 WO2018035961 A1 WO 2018035961A1
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Prior art keywords
chain
protection device
chain protection
upper cover
lower cover
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PCT/CN2016/103938
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English (en)
French (fr)
Inventor
徐阳钢
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太仓钛克国际贸易有限公司
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Publication of WO2018035961A1 publication Critical patent/WO2018035961A1/zh

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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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/06—Gearings for conveying rotary motion by endless flexible members with chains
    • 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
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/02—Driving-chains
    • F16G13/06—Driving-chains with links connected by parallel driving-pins with or without rollers so called open links
    • 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
    • F16H—GEARING
    • F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
    • F16H13/06—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members with members having orbital motion

Definitions

  • the invention relates to the field of chain transmission, in particular to a chain protection device.
  • Chains are basically labor-intensive products, and many developed countries have turned to developing countries for production, which has brought new opportunities for China's chain to expand exports.
  • Chain manufacturing capability is the decisive factor in chain manufacturing, and the center of chain manufacturing strength is the degree of chain manufacturing.
  • the degree of chain manufacturing process depends to a large extent on the professionalism of the chain consumption.
  • the degree of strength of the process equipment directly affects the consumption efficiency of the chain manufacturing company, and the quality of the product is economical.
  • the chain drive is a transmission method in which the movement and power of a drive sprocket having a special tooth shape is transmitted to a driven sprocket having a special tooth shape through a chain.
  • the chain drive has many advantages. Compared with the belt drive, it has no elastic sliding and slipping phenomenon, the average transmission ratio is accurate, the work is reliable, and the efficiency is high.
  • the transmission power is large, the overload capability is strong, and the transmission size under the same working condition is small;
  • the tightening force is small, the pressure acting on the shaft is small; it can work in harsh environments such as high temperature, humidity, dust, pollution, etc. Therefore, in some modern machinery and some special equipment, the chain drive is essential for the transmission part. Important parts.
  • the existing chain on the market is generally composed of outer chain piece, inner chain piece, chain roller and pin shaft.
  • the chain Under normal operation, the chain is easy to wear, easy to rust, susceptible to impact, and the color of the chain appearance
  • the usual solution to these problems is plating, dyeing, baking, and adding lubricants on the surface of the parts.
  • the above methods not only increase environmental pollution, but also increase the manufacturing cost of the enterprise.
  • the object of the present invention is to solve the deficiencies of the prior art and to provide a chain protection device which can prevent rust, dust, reduce wear, impact, and increase the service life of the chain.
  • a chain protection device includes: a chain protection device comprising: an upper cover plate, a connecting plate, a lower cover plate, a mounting hole, a connecting portion and a bump,
  • the upper cover plate, the connecting plate and the lower cover plate are vertically fixedly connected, and the upper cover plate and the lower cover plate are respectively provided with mounting holes, connecting portions and bumps.
  • the mounting hole is a tapered hole, and the taper angle of the mounting hole is 5° to 8°, and both ends of the pin are respectively inserted into the mounting holes of the upper cover and the lower cover, and pass through Install a mounting hole with a tapered surface to make the chain protection device smoother and the chain is not easy to loosen.
  • the curved surface of the connecting portion is an arc having an angle of 135° to 145°, and when the chain protection device is used, the point of use is the connection design between the connecting portion and the outer chain piece, and the surface Compared with the contact between the faces, the friction coefficient is smaller, the transmission is more flexible, and the chain is prevented from falling off.
  • the size of the mounting hole is larger than the diameter of the bump, and the chain is used for a long time, there is a certain stretch, and there is enough gap between the mounting hole and the bump, so there is no need to replace .
  • the mounting holes provided on the upper cover and the lower cover are opposite in position and opposite in a tapered shape.
  • the connecting portions respectively provided on the upper cover and the lower cover are opposite in position.
  • the bumps respectively provided on the upper cover and the lower cover are opposite in position.
  • the material of the chain protection device is rubber, plastic, special engineering plastics, or a ceramic material having self-lubricating properties and high temperature resistance.
  • the chain protection device is completed by an integral molding process, which ensures the reliability of the connection between the various components.
  • a chain protection device has the following advantages compared with the prior art:
  • the contact area between the chain parts and the outside can be greatly reduced, and the rust prevention effect can be prevented, and the small sand particles can be blocked to enter and reduce the wear;
  • the connecting part of the protection device adopts an excessive arc of 135° ⁇ 145°, and the connection design between the connecting part and the outer chain piece is used, and the friction coefficient is smaller than that of the contact between the surface and the surface of the prior art. More flexible rotation;
  • the mounting hole is a conical hole, and the angle of the taper surface is 5° ⁇ 8°, which makes it smoother when the chain is installed, and the chain is not easy to loosen;
  • the raw material of the chain protection device is made of rubber and plastic. Compared with the traditional chain cover full-package chain cover, the weight is only about 1/6. Due to the light weight assembly and simple replacement, the maintenance man-hours such as installation and replacement are reduced.
  • the price is low, easy to change the color, through the appearance of the chain protection device to beautify the chain;
  • the invention can be used for high-speed bicycles, engine chains and industrial chains, and has a wide range of uses;
  • the chain protection device is completed by an integrated molding process, which ensures the reliability of the connection between the various components.
  • Figure 1 is a schematic view of the installation of the present invention
  • Figure 2 is a perspective view of the present invention
  • Figure 3 is a schematic view of the structure of the present invention.
  • a chain protection device includes an upper cover 51, a connecting plate 52, a lower cover 53, a mounting hole 54, a connecting portion 55, and a projection 56.
  • the upper cover 51, the connecting plate 52 and the lower cover 53 are vertically fixedly connected, and the upper cover 51 and the lower cover 53 are respectively provided with a mounting hole 54, a connecting portion 55 and a protrusion 56, and the mounting hole 54 is a tapered hole.
  • the taper surface angle is 5° to 8°
  • the curved surface of the connecting portion 55 is an arc having an angle of 135° to 145°
  • the size of the mounting hole 54 is larger than the diameter of the bump 56.
  • the mounting holes 54 provided on the upper cover 51 and the lower cover 52 are opposite in position and opposite in a tapered manner, and the upper cover 51 and the lower cover 52 are respectively disposed at opposite positions of the connecting portion 55, and the upper cover is The positions of the bumps 56 respectively provided on the plate 51 and the lower cover 52 are opposite.
  • the pin 3 sequentially passes through the outer chain piece 1, the inner chain piece 2, the chain roller 4, the inner chain piece 2, the outer chain piece 1, and is fastened together, and both ends of the pin 3 are fixed on the outer chain piece 1.
  • the chain protection device 5 is provided with an upper cover 51 and a lower cover 53.
  • the mounting holes 54 provided on the upper cover 51 and the lower cover 53 are sleeved on both ends of the pin 3 to complete a chain protection device.
  • the chain protection device 5 of the latter section only needs to repeat the above operation, and the mounting holes 54 are sleeved on both ends of the pin 3, and the bumps 56 provided on the upper cover 51 and the lower cover 53 are provided.
  • the card is inserted into the mounting hole 54 of the pin 3, and the above work is repeated until all the pins 3 are sheathed.
  • the angle of the taper surface of the mounting hole 54 is 5°.
  • the chain protection device 5 is made smoother during installation, and the chain is not easily loosened, and the curved surface of the connecting portion 52 is at an angle of 135°.
  • the chain protection device 5 uses a connection design between the connecting portion 52 and the outer chain piece 2, and the friction coefficient is smaller than that between the surface and the surface, and the transmission is more flexible, preventing the chain from being broken. .
  • the invention adopts the three-sided embracing manner, can greatly reduce the contact area of the chain parts with the outside, plays the role of rust prevention, can also block the entry of small sand particles, reduces wear, and the chain protection device will be firstly subjected to the impact of external force. Force deformation, reduce damage to the chain, increase chain life; can reduce the harsh sound caused by the conflict between metals, reduce noise.
  • the pin 3 sequentially passes through the outer chain piece 1, the inner chain piece 2, the chain roller 4, the inner chain piece 2, the outer chain piece 1, and is fastened together, and both ends of the pin 3 are fixed on the outer chain piece 1.
  • the chain protection device 5 is provided with an upper cover 51 and a lower cover 53.
  • the mounting holes 54 provided on the upper cover 51 and the lower cover 53 are sleeved on both ends of the pin 3 to complete a chain protection device. 5, the rear chain protection device 5 only needs to repeat the above operation, the mounting hole 54 is sleeved on both ends of the pin 3, and the bump 56 provided on the upper cover 51 and the lower cover 53 is stuck in the sleeve. In the mounting hole 54 of the pin 3, the above work is repeated until all the pins 3 are fitted with the chain protection device.
  • the angle of the taper surface of the mounting hole 54 is 6°.
  • the chain protection device 5 is made smoother during installation, and the chain is not easily loosened, and the curved surface of the connecting portion 52 is at an angle of 140°.
  • the chain protection device 5 uses a connection design between the connecting portion 52 and the outer chain piece 2, and the friction coefficient is smaller than that between the surface and the surface, and the transmission is more flexible, preventing the chain from being broken. .
  • the invention adopts the three-sided embracing manner, can greatly reduce the contact area of the chain parts with the outside, plays the role of rust prevention, can also block the entry of small sand particles, reduces wear, and the chain protection device will be firstly subjected to the impact of external force. Force deformation, reduce damage to the chain, increase chain life; can reduce the harsh sound caused by the conflict between metals, reduce noise.
  • the pin 3 sequentially passes through the outer chain piece 1, the inner chain piece 2, the chain roller 4, the inner chain piece 2, the outer chain piece 1, and is fastened together, and both ends of the pin 3 are fixed on the outer chain piece 1.
  • the chain protection device 5 is provided with an upper cover 51 and a lower cover 53.
  • the mounting holes 54 provided on the upper cover 51 and the lower cover 53 are sleeved on both ends of the pin 3 to complete a chain protection device.
  • the chain protection device 5 of the latter section only needs to repeat the above operation, and the mounting holes 54 are sleeved on both ends of the pin 3, and the bumps 56 provided on the upper cover 51 and the lower cover 53 are provided.
  • the card is inserted into the mounting hole 54 of the pin 3, and the above work is repeated until all the pins 3 are sheathed.
  • the angle of the taper surface of the mounting hole 54 is 8°.
  • the chain protection device 5 is made smoother during installation, and the chain is not easily loosened, and the curved surface of the connecting portion 52 is at an angle of 145°.
  • the chain protection device 5 uses a connection design between the connecting portion 52 and the outer chain piece 2, and the friction coefficient is smaller than that between the surface and the surface, and the transmission is more flexible, preventing the chain from being broken. .
  • the invention adopts the three-sided embracing manner, can greatly reduce the contact area of the chain parts with the outside, plays the role of rust prevention, can also block the entry of small sand particles, reduces wear, and the chain protection device will be firstly subjected to the impact of external force. Force deformation, reduce damage to the chain, increase chain life; can reduce the harsh sound caused by the conflict between metals, reduce noise.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

公开了一种链条保护装置，所述链条保护装置包括上盖板（51）、连接板（52）、下盖板（53）、安装孔（54）、连接部（55）和凸块（56），所述上盖板（51）、连接板（52）和下盖板（53）依次垂直固连，上盖板（51）和下盖板（53）上分别设有安装孔（54）、连接部（55）和凸块（56），所述链条保护装置可以极大减少链片与外界的接触面积，起到防锈的作用，也可以阻断小砂粒进入，减少磨损，在受到外力冲击时，链条保护装置会首先受力变形，减少对链片的伤害，增加链条的使用寿命。

Description

链条保护装置 技术领域
本发明涉及链传动领域，具体是一种链条保护装置。
背景技术
链条基本属于劳动密集型产品，很多发达国家已转向发展中国家生产，这为我国链条扩大出口带来了新的机遇。链条制造能力是链条制造业的决定性因素，而链条制造实力的中心是链条制造的工艺程度。链条制造工艺程度很大程度上取决于链条消费专业程度。工艺装置配备实力程度直接影响到链条制造公司消费效率，产品的质量程度经济效益。
链传动是通过链条将具有特殊齿形的主动链轮的运动和动力传递到具有特殊齿形的从动链轮的一种传动方式。链传动有许多优点，与带传动相比，无弹性滑动和打滑现象，平均传动比准确，工作可靠，效率高；传递功率大，过载能力强，相同工况下的传动尺寸小；所需张紧力小，作用于轴上的压力小；能在高温、潮湿、多尘、有污染等恶劣环境中工作，因此，一些现代化机械设备和一些特殊装备上，链传动是传动部分必不可少的重要零部件。
近几年来，我国链条行业非常注重硬件设备的投入，不少链条企业投入了大量的资金和人力、物力，施行链条使用设备机电一体化的技改项目，成功地开发了一批实力程度较高的链条制造独家使用设备，并投入运用，其专业的消费效率提高，工艺进程更趋合理，功能愈加完全，使我国的中小规格惯例链条制造实力方面有了较大幅度的进步。
市场上现有的链条一般是由外链片，内链片，链滚和销轴组立而成，在正常运转的情况下，链条易磨损，易生锈，易受冲击，且链条外观颜色单一，解决这些问题通常采用的办法是零件表面电镀，染色，烤漆，添加润滑油等，但是，采用上述方法不仅增加了环境的污染，而且提高了企业的制造成本。
发明内容
发明目的：本发明的目的是为了解决现有技术的不足，提供一种可以防锈、防尘、减少磨损、抗冲击、增加链条的使用寿命的链条保护装置。
技术方案：为了实现以上目的，本发明所述的一种链条保护装置，它包括：链条保护装置包括：上盖板、连接板、下盖板、安装孔、连接部和凸块，所述的 上盖板、连接板和下盖板依次垂直固连，上盖板和下盖板上分别设有安装孔、连接部和凸块。
作为本发明的进一步优选，所述的安装孔为圆锥孔，安装孔的锥面角度为5°～8°，销轴的两端分别卡入上盖板和下盖板的安装孔内，通过设置带有锥面的安装孔，使链条保护装置在安装时更顺畅，且链条不易松脱。
作为本发明的进一步优选，所述的连接部的曲面是角度为135°～145°的圆弧，链条保护装置在使用时，使用点即连接部和外链片之间的衔接设计，与面和面之间接触相比，摩擦系数更小，传动更灵活，防止掉链。
作为本发明的进一步优选，所述的安装孔的尺寸大于凸块的直径，链条长时间使用，会存在一定的拉伸，安装孔和凸块之间，余留有足够的间隙，因此无需替换。
作为本发明的进一步优选，所述的上盖板和下盖板上设有的安装孔的位置相对且锥面相对。
作为本发明的进一步优选，所述的上盖板和下盖板上分别设有的连接部的位置相对。
作为本发明的进一步优选，所述的上盖板和下盖板上分别设有的凸块的位置相对。
作为本发明的进一步优选，所述的链条保护装置的材料为橡胶、塑料、特种工程塑料，或者是具有自润性和耐高温的陶瓷材料。
作为本发明的进一步优选，所述的链条保护装置采用一体成型的工艺完成，保证了各个零部件之间连接的可靠性。
有益效果：本发明所述的一种链条保护装置，与现有技术相比，具有以下优点：
1、通过采用了三面环抱方式，可以极大减少链条零件与外界的接触面积，起到防锈的作用，也可以阻断小砂粒进入，减少磨损；
2、在受到外力冲击时，链条保护装置会首先受力变形，减少对链片的伤害，增加链条寿命；
3、通过在链条表面加设保护装置，可减轻因金属之间的冲突而产生的刺耳声音，降低噪音；
4、通过在链条表面加设保护装置，可以降低链条零件的表面处理要求，节省生产时间，降低企业成本；
5、保护装置的连接部采用135°～145°的圆弧过度，使用连接部和外链片之间的衔接设计，与现有技术的面和面之间接触相比，摩擦系数更小，转动更灵活；
6、安装孔为圆锥孔，锥面角度为5°～8°，使之在安装链条时更顺畅，且链条不易松脱；
7、链条保护装置原材料采用橡胶和塑料，与传统的链条盖全包链罩相比，重量仅为其1/6左右，由于重量轻装配、更换简单，减少安装及更换等维护工时；
8、价格低廉，容易改变色泽，通过链条保护装置的外观来美化链条；
9、本发明除了普通单速自行车可以使用外，高档变速自行车，引擎链条，工业链条都可以使用，使用范围广；
10、链条保护装置采用一体成型的工艺完成，保证了各个零部件之间连接的可靠性。
附图说明
图1为本发明的安装示意图；
图2为本发明的立体图；
图3为本发明的结构示意图。
具体实施方式
下面结合附图，进一步阐明本发明。
如图1所示，本发明所述的一种链条保护装置，它包括：上盖板51、连接板52、下盖板53、安装孔54、连接部55和凸块56。
上盖板51、连接板52和下盖板53依次垂直固连，上盖板51和下盖板53上分别设有安装孔54、连接部55和凸块56，安装孔54为圆锥孔，锥面角度为5°～8°，所述的连接部55的曲面是角度为135°～145°的圆弧，安装孔54的尺寸大于凸块56的直径。
上盖板51和下盖板52上设有的安装孔54的位置相对且锥面相对，上盖板51和下盖板52上分别设有的连接部55的位置相对，所述的上盖板51和下盖板52上分别设有的凸块56的位置相对。
实施例1
销轴3依次穿过外链片1、内链片2、链滚4、内链片2、外链片1并将其紧固在一起，销轴3的两端被固定在外链片1上，链条保护装置5上设有上盖板51和下盖板53，上盖板51和下盖板53上设有的安装孔54套在销轴3的两端即可完成一节链条保护装置5的安装，后面一节链条保护装置5只需要重复上述操作，将安装孔54套在销轴3的两端，上盖板51和下盖板53上设有的凸块56 卡在套有销轴3的安装孔54内，如此重复上述工作直至所有销轴3均被套上链条保护装置即可。
安装孔54的锥面角度为5°，通过设置带有锥面的安装孔54，使链条保护装置5在安装时更顺畅，且链条不易松脱，连接部52的曲面是角度为135°的圆弧，链条保护装置5在使用时，使用点即连接部52和外链片2之间的衔接设计，与面和面之间接触相比，摩擦系数更小，传动更灵活，防止掉链。
本发明采用了三面环抱方式，可以极大减少链条零件与外界的接触面积，起到防锈的作用，也可以阻断小砂粒进入，减少磨损，在受到外力冲击时，链条保护装置会首先受力变形，减少对链片的伤害，增加链条寿命；可减轻因金属之间的冲突而产生的刺耳声音，降低噪音。
实施例2
销轴3依次穿过外链片1、内链片2、链滚4、内链片2、外链片1并将其紧固在一起，销轴3的两端被固定在外链片1上，链条保护装置5上设有上盖板51和下盖板53，上盖板51和下盖板53上设有的安装孔54套在销轴3的两端即可完成一节链条保护装置5的安装，后面一节链条保护装置5只需要重复上述操作，将安装孔54套在销轴3的两端，上盖板51和下盖板53上设有的凸块56卡在套有销轴3的安装孔54内，如此重复上述工作直至所有销轴3均被套上链条保护装置即可。
安装孔54的锥面角度为6°，通过设置带有锥面的安装孔54，使链条保护装置5在安装时更顺畅，且链条不易松脱，连接部52的曲面是角度为140°的圆弧，链条保护装置5在使用时，使用点即连接部52和外链片2之间的衔接设计，与面和面之间接触相比，摩擦系数更小，传动更灵活，防止掉链。
本发明采用了三面环抱方式，可以极大减少链条零件与外界的接触面积，起到防锈的作用，也可以阻断小砂粒进入，减少磨损，在受到外力冲击时，链条保护装置会首先受力变形，减少对链片的伤害，增加链条寿命；可减轻因金属之间的冲突而产生的刺耳声音，降低噪音。
实施例3
销轴3依次穿过外链片1、内链片2、链滚4、内链片2、外链片1并将其紧固在一起，销轴3的两端被固定在外链片1上，链条保护装置5上设有上盖板51和下盖板53，上盖板51和下盖板53上设有的安装孔54套在销轴3的两端即可完成一节链条保护装置5的安装，后面一节链条保护装置5只需要重复上述操作，将安装孔54套在销轴3的两端，上盖板51和下盖板53上设有的凸块56 卡在套有销轴3的安装孔54内，如此重复上述工作直至所有销轴3均被套上链条保护装置即可。
安装孔54的锥面角度为8°，通过设置带有锥面的安装孔54，使链条保护装置5在安装时更顺畅，且链条不易松脱，连接部52的曲面是角度为145°的圆弧，链条保护装置5在使用时，使用点即连接部52和外链片2之间的衔接设计，与面和面之间接触相比，摩擦系数更小，传动更灵活，防止掉链。
本发明采用了三面环抱方式，可以极大减少链条零件与外界的接触面积，起到防锈的作用，也可以阻断小砂粒进入，减少磨损，在受到外力冲击时，链条保护装置会首先受力变形，减少对链片的伤害，增加链条寿命；可减轻因金属之间的冲突而产生的刺耳声音，降低噪音。
上述实施方式只为说明本发明的技术构思及特点，其目的是让熟悉该技术领域的技术人员能够了解本发明的内容并据以实施，并不能以此来限制本发明的保护范围。凡根据本发明精神实质所做出的等同变换或修饰，都应涵装置在本发明的保护范围之内。

Claims (10)

  1. 一种链条保护装置，其特征在于：它包括：上盖板、连接板、下盖板、安装孔、连接部和凸块，所述的上盖板、连接板和下盖板依次垂直固连，上盖板和下盖板上分别设有安装孔、连接部和凸块。
  2. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的安装孔为圆锥孔。
  3. 根据权利要求2所述的一种链条保护装置，其特征在于：所述的安装孔的锥面角度为5°～8°。
  4. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的连接部的曲面是角度为135°～145°的圆弧。
  5. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的安装孔的尺寸大于凸块的直径。
  6. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的上盖板和下盖板上设有的安装孔的位置相对且锥面相对。
  7. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的上盖板和下盖板上分别设有的连接部的位置相对。
  8. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的上盖板和下盖板上分别设有的凸块的位置相对。
  9. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的链条保护装置的材料为橡胶、塑料、特种工程塑料，或者是具有自润性和耐高温的陶瓷材料。
  10. 根据权利要求1所述的一种链条保护装置，其特征在于：所述的链条保护装置采用一体成型的工艺完成。
PCT/CN2016/103938 2016-08-24 2016-10-31 链条保护装置 WO2018035961A1 (zh)

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