baber/WOPTO huggingface dataset:
Patent WO-2020057549-A1 (WO)
Inventor: CHEN XIANGYANG
IPC: A61K31/4545
Filed: 2019-09-18
Abstract: The present invention relates to various crystalline forms of 6- (1-acryloylpiperidin-4-yl)-2- (4-phenoxyphenyl) nicotinamide. The present invention also relates to pharmaceutical compositions comprising the crystalline forms.
Patent WO-2020248422-A1 (WO)
Inventor: ZHOU ZHENG
IPC: G02F1/13357
Filed: 2019-09-19
Abstract: 一种背光模组（100）及显示装置（200），背光模组（100）包括衬底、位于衬底上的光源（10）、及位于光源（10）一侧的导光板（20）；导光板（20）包括位于导光板（20）边缘区域的第一区（21）；第一区（21）内设置有至少一凸起（30）；在光源（10）至导光板（20）的方向上，凸起（30）的厚度逐渐增加，消除了大视角下背光模组（100）对应的显示装置（200）出现的局部亮点或亮线。
Patent WO-2021031290-A1 (WO)
Title: Translation method and device for earphone pair, earphone pair and translation system
Inventor: ZHANG HAIHONG
IPC: H04W4/80
Filed: 2019-09-25
Abstract: The present invention discloses a translation method and device for earphone pair, an earphone pair and a translation system, the earphone pair comprises a first earphone and a second earphone which correspond to each other and is used for establishing a Bluetooth link with electronic apparatus; the translation method comprises: controlling the first earphone to establish a Bluetooth link with the electronic apparatus; controlling the first earphone to obtain a first voice signal input by a user, and uploading the first voice signal to the electronic apparatus through the Bluetooth link, so that the electronic apparatus translates the first voice signal to obtain a first translation signal; controlling the first earphone and the second earphone to obtain the first translation signal sent by the electronic apparatus through the Bluetooth link; controlling the first earphone and the second earphone to play the first translation signal.
Patent WO-2021062575-A1 (WO)
Inventor: JIANG QINYAN
IPC: H04W72/02
Filed: 2019-09-30
Abstract: Provided by the present application are a signal transmission method and apparatus, and a communication system. The apparatus comprises a first transmission unit, which is configured to: receive a first synchronization signal/physical broadcast channel block (SS/PBCH block, SSB), the first SS/PBCH block not being located on a synchronization raster; and receive a physical downlink control channel (PDCCH), the PDCCH being used to schedule a physical downlink shared channel (PDSCH) used for carrying remaining minimum system information/system information block 1 (RMSI/SIB1).
Patent WO-2021027044-A1 (WO)
Title: 一种防电化腐蚀的铜铝线耳及导线结合方法
Inventor: Zhan Rifu
IPC: H01R4/62
Filed: 2019-10-10
Abstract: 本发明公开了一种防电化腐蚀的铜铝线耳，包括线耳主体，所述的线耳主体的顶端设置有空腔，所述的空腔用于连接剥皮后的电缆，所述的线耳主体的末端用于连接其他电器设备或者电缆；所述的线耳主体的材质是铜金属，所述的铜铝线耳还包括铝金属层，所述的铝金属层设置在线耳主体的顶端的空腔的内侧，所述的铝金属层与线耳主体固定连接。本发明还公开了一种导线结合方法。本发明的有益效果是：1、通过将铜铝接触面隐藏在线耳内部，避免接触潮湿空气，不容易发生电化腐蚀，保证了导线连接的稳定、可靠，不易腐蚀，使用寿命长；2、线耳主体为铜制结构，具有比传统铝制线耳更好的导电性且具有较大的机械强度和金属韧性，不容易发生断裂。
Patent WO-2020140533-A1 (WO)
Inventor: LING FANGHUA
IPC: H02K41/03
Filed: 2019-10-11
Abstract: 一种线性振动电机（100），其包括具有收容空间（10）的基座（1）、置于所述收容空间（10）的振动单元（2）、将所述振动单元（2）悬置于所述收容空间（10）的弹性件（3）以及固定于所述基座（1）并驱动所述振动单元（2）振动的线圈组件（4）；所述振动单元（2）包括具有通孔（210）的质量块（21）、收容于所述通孔（210）内的极芯（22）以及固定于所述极芯（22）相对两侧的磁钢（23），所述极芯（22）包括相对间隔设置的第一侧壁（221）和相对间隔设置的第二侧壁（222），所述磁钢（23）固定于所述第一侧壁（221），所述第二侧壁（222）的厚度大于所述第一侧壁（221）的厚度。该线性振动电机（100）的振动性能好。
Patent WO-2020258606-A1 (WO)
Inventor: XU DEHUI
IPC: H05H1/30
Filed: 2019-10-21
Abstract: A reverse-phase double-high-voltage three-ring-structure safety jet device. A power module with reversed-phase double high-voltage output is adopted, three annular copper foils are sequentially wrapped on the outer wall of a tubular cavity in the axial direction, respectively marked as a first copper foil, a second copper foil and a third copper foil in the direction from an air inlet (101) to a low-temperature plasma jet outlet, and the three annular copper foils are correspondingly connected to an output end 1 of the high-voltage power module, an output end 2 of the high-voltage power module and a ground end, respectively. The distance h  12  between the first copper foil and the second copper foil is 1.5-2.5 times of the distance h  23  between the second copper foil and the third copper foil. The device is suitable for a miniaturized power module with 220V mains supply input, is simple and portable and convenient to use in various occasions.
Patent WO-2021072788-A1 (WO)
Inventor: LU YI
IPC: H04L45/60
Filed: 2019-10-23
Abstract: The present invention relates to the field of wireless routers, and disclosed is an extensible wireless router. The extensible wireless router comprises an extensible wireless router body; both ends of the extensible wireless router body are symmetrically equipped with first screws; two sides of the extensible wireless router body are each equipped with a supporting plate; and the first screws are each sleeved by a soft cushion ring at a section located between the supporting plate and the extensible wireless router body. A second nut may be loosened from a second screw, then the supporting plates on both sides are turned over to the left and right so that a connecting plate rotates on a mounting plate until adjusted to a desired angle, and the second nut is re-locked onto the second screw. Therefore, turning over a corresponding direction of a registered jack slot at the rear end of the extensible wireless router body to various positions is convenient, and the corresponding direction of the registered jack slot at the rear end of the extensible wireless router body may be adjusted according to different actual total network cable laying directions in indoors.
Patent WO-2020134450-A1 (WO)
Inventor: LIU RONGKUAN
IPC: H04L1/16
Filed: 2019-10-25
Abstract: 本申请提供一种信息传输的方法及装置。该方法包括：第一接收节点接收来自发送节点的第一数据和第二数据，并向所述发送节点反馈第一反馈信息和第二反馈信息，所述第一反馈信息指示所述第一接收节点对所述第一数据的接收状态，所述第二反馈信息指示所述第一接收节点对所述第二数据的接收状态，其中上述第一数据的目的节点为所述第一接收节点，上述第二数据的目的节点为第二接收节点。所述发送节点根据所述第一反馈信息和所述第二反馈信息对所述第一数据和所述第二数据进行联合编码生成第三数据，并发送该第三数据。通过提供的实施例，能够优化网络的传输性能，提高数据传输效率。
Patent WO-2021081696-A1 (WO)
Inventor: HUANG QUFANG
IPC: H04W72/02
Filed: 2019-10-28
Abstract: 本申请提供了一种传输数据的方法和通信装置，能够解决业务冲突的问题，提高数据传输性能。该方法可以包括：第一网络设备接收来自第二网络设备的第一指示信息，第一网络设备根据第一指示信息预估向终端设备传输数据包的时刻为第一时刻；当传输资源在第一时刻不足的情况下，或者，多个业务在第一时刻发生冲突的情况下，第一网络设备在第一时刻对应的时间窗内的第二时刻向终端设备发送数据包。
Patent WO-2021087746-A1 (WO)
Inventor: CAI QIQIAN
IPC: G06F16/9535
Filed: 2019-11-05
Abstract: The present application relates to the technical field of electronic devices. Disclosed are a push content processing method and apparatus, and an electronic device and a storage medium. The method is applied to the electronic device, and comprises: an electronic device receives push content to be displayed to a target user; obtaining a user matching a user portrait of a target user as a reference user according to the user portrait of the target user; obtaining a conversion rate of the reference user for the push content as a reference conversion rate; and determining a processing mode of the push content on the basis of the reference conversion rate. According to the push content processing method and apparatus, and the electronic device and the storage medium provided in embodiments of the present application, when the push content is received, the reference user is obtained according to the user portrait, the reference conversion rate of the reference user for the push content is obtained, and the processing mode of the push content is determined on the basis of the reference conversion rate, so that the conversion rate of the displayed push content and user experience are improved.
Patent WO-2020134731-A1 (WO)
Inventor: LIANG CHENGDU
IPC: H01M10/0525
Filed: 2019-11-20
Abstract: 本申请涉及电池领域，具体地讲，涉及一种电极极片和电化学装置。本申请的电极极片包括集流体和设置于所述集流体至少一个表面上的电极活性材料层，其中，所述集流体包括支撑层和设置于支撑层至少一个表面上的导电层，所述导电层的单面厚度D2满足：30nm≤D2≤3μm，所述电极活性材料层包含电极活性材料、粘结剂和导电剂，所述电极活性材料层在厚度方向分为内侧区域和外侧区域两个区域，且所述电极活性材料层中的导电剂在厚度方向上具有不均匀的分布，其中基于电极活性材料层的总重量，在所述电极活性材料层的内侧区域中的导电剂的重量百分含量高于电极活性材料层的外侧区域中的导电剂的重量百分含量，且所述电极活性材料层的内侧区域中的导电剂中含有一维导电材料、二维导电材料中的至少一种。本申请的电极极片具有良好的可加工性，包含该电极极片的电化学装置具有高的能量密度和良好的电性能以及长期可靠性。
Patent WO-2020103883-A1 (WO)
Inventor: HE LEIJUN
IPC: G06F7/523
Filed: 2019-11-20
Abstract: Disclosed is a method for executing a matrix multiplication operation, which belongs to the field of data processing. The method comprises: acquiring a matrix A1, a matrix B2 and an index matrix; generating n matrices A2 according to the index matrix and the matrix A1, wherein the n matrices A2 sequentially correspond to the n columns of the index matrix on a one-to-one basis; t columns of each matrix A2 sequentially correspond to t elements of a column of the corresponding index matrix on a one-to-one basis; each column of each matrix A2 is one column indicated in the matrix A1 by one element in the corresponding index matrix; and generating a matrix C according to the n matrices A2 and the matrix B2, wherein the n columns of the matrix C sequentially correspond to the n matrices A2 on a one-to-one basis; the n columns of the matrix C sequentially correspond to the n columns of the matrix B2 on a one-to-one basis; and each column of the matrix C is a product of one corresponding matrix A2 and one column in the corresponding matrix B2. According to the present application, it is only necessary to read data from a matrix A1 once to complete a matrix multiplication operation, thereby achieving maximum data reusability.
Patent WO-2021097793-A1 (WO)
Inventor: BAI LONGJI
IPC: G03B9/08
Filed: 2019-11-22
Abstract: The present invention provides a shutter and an imaging device. The shutter comprises a first mounting plate, a synchronizing ring, a plurality of first blades, and a plurality of driving devices. A shutter opening is formed on the first mounting plate, the plurality of first blades are provided around the shutter opening, and each of the first blades is rotatably connected to the first mounting plate. The plurality of driving devices is provided around the shutter opening, each of the driving devices is transmittingly connected to the synchronizing ring, and the synchronizing ring is transmittingly connected to each of the first blades. The driving devices simultaneously drive the synchronizing ring, and in turn drive the first blades to rotate, so as to open or close the shutter opening. Compared with only one driving device, the present invention reduces the power and volume of a single driving device and enhances the overall output of the driving device, thereby increasing the torque of the synchronizing ring, increasing the rotation speeds of the synchronizing ring and the first blades, and finally increasing the speed of opening and closing the shutter.
Patent WO-2021102683-A1 (WO)
Inventor: CHENG KAI
IPC: H01L29/778
Filed: 2019-11-26
Abstract: La présente invention concerne une structure semi-conductrice et son procédé de fabrication. Dans la structure semi-conductrice, une couche d'isolation in situ est formée sur une hétérojonction. Un évidement est ménagé dans la couche d'isolation in situ. Des couches de transition sont disposées dans l'évidement et sur la couche d'isolation in situ. Une couche semi-conductrice de type p est formée dans une région de grille sur la couche de transition. La couche de transition facilite la formation de la couche semi-conductrice de type p à l'extérieur de l'évidement pendant un procédé. La couche d'isolation in-situ et la couche de transition réduisent un courant de fuite de grille formé par fuite du canal à la grille dans un dispositif, de telle sorte qu'une couche barrière dans l'hétérojonction est mince, ce qui permet d'améliorer une tension seuil. De plus, la couche d'isolation in situ est disposée de façon à réduire la résistance de feuille et à améliorer la concentration de gaz d'électrons bidimensionnel, ce qui permet d'améliorer la capacité de la grille lors de la commande du canal, et d'améliorer un courant de fonctionnement.
Patent WO-2021102711-A1 (WO)
Inventor: LI LIUZHONG
IPC: H01L29/786
Filed: 2019-11-27
Abstract: A thin-film transistor and a preparation method therefor, and a thin-film transistor array. The thin-film transistor comprises: a substrate layer (10); a buffer layer (20) located on the substrate layer (10); a source electrode (30) and a drain electrode (40) located on the buffer layer (20) and spaced apart from each other; a metal-oxide semiconductor layer (50) located on the source electrode (30), the drain electrode (40), and the buffer layer (20) between the source electrode (30) and the drain electrode (40); a first insulating layer (60) located on the source electrode (30), the drain electrode (40), the metal-oxide semiconductor layer (50) and the buffer layer (20), wherein the first insulating layer (60) is composed of an organic material (61) and metal-oxide nanoparticles (62) dispersed in the organic material (61); and a gate electrode (70) located on the first insulating layer (60). The organic material (61) and the metal-oxide nanoparticles (62) dispersed in the organic material (61) are used as the first insulating layer (60), such that the manufacturing costs of the thin-film transistor are reduced while increasing the dielectric constant of the first insulating layer (60); and by means of adding a photosensitive material to the first insulating layer (60), there is no need to manufacture a pattern by means of a traditional photoresist and photoresist stripping, thereby simplifying the manufacturing process of the thin-film transistor, and reducing the manufacturing costs.
Patent WO-2021114174-A1 (WO)
Title: 电池仓和用于交通工具的拉手
Inventor: WANG ZIFENG
IPC: B60N3/02
Filed: 2019-12-12
Abstract: 一种电池仓和用于交通工具的具有该电池仓的拉手，所述电池仓包括：电池安装座（2），具有间隔排布的至少两个电池安装槽（20）；连接电极（3），在电池安装座（2）上，且位于相邻的电池安装槽（20）之间；电池仓盖（4），与连接电极（3）可拆卸连接；出仓组件（5），位于连接电极（3）上，被配置为向电池仓盖（4）提供使电池仓盖（4）远离连接电极（3）的作用力。在拆卸电池仓盖（4）时，能轻易地将电池仓盖（4）从安装槽（20）上取下。
Patent WO-2020125656-A1 (WO)
Inventor: LIU YONGZHEN
IPC: G05D3/10
Filed: 2019-12-18
Abstract: Disclosed is an imaging adjustment device (100). The imaging adjustment device (100) comprises: a scanning driving mechanism (10), an adjustment mechanism (50) connected to the scanning driving mechanism (10), and an imaging platform (90) connected to the adjustment mechanism (50), wherein the scanning driving mechanism (10) comprises a mounting frame (20), a first telescopic assembly (30) connected to the mounting frame (20), and a second telescopic assembly (40) connected to the first telescopic assembly (30); the adjustment mechanism (50) comprises a stand base (60) connected to the second telescopic assembly (40), a vertical adjustment assembly (70) connected to the stand base (60), and a horizontal adjustment assembly (80) connected to the vertical adjustment assembly (70); and the imaging platform (90) is connected to the horizontal adjustment assembly (80). According to the imaging adjustment device (100), the adjustment of the imaging platform (90) in a vertical direction and the adjustment of the levelness are realized by means of providing the vertical adjustment assembly (70) and the horizontal adjustment assembly (80); and a focusing operation can be realized by means of the vertical adjustment assembly (70), and the adjustment of the levelness of a sample can be realized by means of the horizontal adjustment assembly (80), so as to reduce the deviation of the imaging platform (90) during machining and sample mounting, thereby improving the precision of sample information collection.
Patent WO-2020173192-A1 (WO)
Inventor: HSIEH CHAO-KUEI
IPC: G06F12/00
Filed: 2019-12-19
Abstract: The subject disclosure relates to a universal flash storage memory module, a controller and an electronic device with advanced turbo write buffer and method for operating the memory module. The Universal Flash Storage (UFS) memory module comprises an input/output interface including: a clock pin for receiving a reference clock signal from a host; a pair of differential input pins for receiving data from the host; and a pair of differential output pins for transmitting data to the host; a flash memory including: a write buffer portion; and a normal storage portion having a plurality of logic units; and a controller including: a processor; a first register indicating a maximum size of the write buffer portion; a second register indicating an available size of the write buffer portion; and a third register indicating the UFS memory module is in a shared buffer mode or an advanced mode; wherein if the third register indicates whether the UFS memory module is in the shared buffer mode, the write buffer portion only includes a first shared buffer area; and if the third register indicates the UFS memory module is in the advanced mode, the write buffer portion includes at least one dedicated buffer area, each dedicated buffer area corresponding to one of the plurality of logic units.
Patent WO-2020147513-A1 (WO)
Inventor: LI YONG
IPC: D03D47/32
Filed: 2019-12-20
Abstract: 一种喷水织机用喷嘴，包括喷嘴主体（1）以及向所述喷嘴主体供水的供水通道（2），所述喷嘴主体（1）的轴向方向与所述供水通道（2）的轴向方向垂直；所述喷嘴主体（1）上设置有与其轴向方向垂直的进水孔（11）。由于喷嘴主体上的进水孔（11）的轴向方向与供水通道（2）的轴向方向平行且不重合，因此由供水通道（2）进入的水不会直接进入进水孔（11）中，而是被位于进水孔（11）与供水通道（2）之间的喷嘴主体的侧壁所阻碍，从而避免产生湍流现象，使由喷嘴主体中的水在整流状态下稳定地、高速地被喷射出去，从而避免产生产品质量问题。
Patent WO-2021142619-A1 (WO)
Title: Discharge control circuit, switching power supply, and discharge control device
Inventor: LUO LE
IPC: H02M1/32
Filed: 2020-01-14
Abstract: A discharge control circuit, a switching power supply, and a discharge control device. The discharge control circuit comprises: a control circuit (101), a photoelectric coupler (102), and a discharge circuit (103), wherein the photoelectric coupler (102) comprises an input end and an output end; the discharge circuit (103) comprises a first discharge circuit (104) and a second discharge circuit (105); an input end of the control circuit (101) is an external input voltage; the control circuit (101) is used for controlling an output duration and an output interval duration of an output voltage according to the external input voltage; the input end of the photoelectric coupler (102) is connected to an output end of the control circuit (101); the output end of the photoelectric coupler (102) is connected to the first discharge circuit (104); the first discharge circuit (104) is connected to the second discharge circuit (105). The discharge circuit has the advantages of stability, reliability and high safety.
Patent WO-2021146907-A1 (WO)
Title: Array substrate and display panel
Inventor: ZANG PENGCHENG
IPC: G06F3/041
Filed: 2020-01-21
Abstract: An array substrate (1), comprising: a first base substrate (11), multiple gate lines (12), multiple common electrodes (13), and multiple pixel electrodes (14). The multiple gates (12) are disposed on the first base substrate (11) and extend in a first direction (X). The multiple common electrodes (13) are disposed on the side of the multiple gate lines (12) distant from the first base substrate (11). The multiple pixel electrodes (14) are disposed on the side of the multiple gate lines (12) distant from the first base substrate (11) and are arranged in an array. The multiple pixel electrodes (14) are arranged to form multiple rows of pixel electrodes (14) extending in the first direction (X). At least one pixel electrode (14) of each row of pixel electrodes (14) comprises two sub-pixel electrodes (141) arranged in a second direction (Y). At least one gate line (12) is disposed between the two sub-pixel electrodes (141). The two sub-pixel electrodes (141) are coupled to one of the at least one gate line (12). Among the multiple common electrodes (13) and the multiple pixel electrodes (14), the electrodes more distant from the first base substrate (11) respectively comprise multiple slits (S). The first direction (X) crosses the second direction (Y).
Patent WO-2020156389-A1 (WO)
Inventor: HE QIANG
IPC: G06Q50/00
Filed: 2020-01-21
Abstract: 一种信息推送方法和装置，该方法包括：获取目标用户的社交网络（201），社交网络包括位于社交网络中的用户的行为信息和用于指示各用户之间是否建立关联关系的指示信息；基于目标用户的行为信息、社交网络中与目标用户未建立关联关系的用户的行为信息，确定目标用户与未建立关联关系的用户之间，建立关联关系的概率（202）；将超过预设阈值的概率对应的用户的用户标识推送给目标用户（203）。该方法可以更加准确的预测目标用户对其他用户的感兴趣程度，从而提高信息推送效率。
Patent WO-2021159442-A1 (WO)
Title: Channel access enchancement for a fixed frame mode for unlicensed spectrum
Inventor: XU CHANGLONG
IPC: H04W74/00
Filed: 2020-02-14
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may monitor for a channel occupancy time (COT) indicator from a base station at a first time in a fixed frame period (FFP) of a fixed frame mode for unlicensed spectrum, based at least in part on a determination that the COT indicator is not received at an earlier time in the FFP; and transmit uplink data in the FFP based at least in part on receiving the COT indicator at the first time. Numerous other aspects are provided.
Patent WO-2020192401-A1 (WO)
Title: Système et procédé pour générer une réponse sur la base d'un regroupement et d'une similarité de phrases
Inventor: LI SIJIA
IPC: G06F16/335
Filed: 2020-03-09
Abstract: L'invention concerne un procédé et un système permettant de générer une réponse à une question. Le système comprend un dispositif informatique. Le dispositif informatique comprend un processeur et un dispositif de stockage stockant un code pouvant être exécuté par ordinateur. Le code pouvant être exécuté par ordinateur, lorsqu'il est exécuté au niveau du processeur, est conçu pour : recevoir la question saisie par un utilisateur concernant un produit ; extraire des réponses cibles d'une base de connaissances de questions-réponses (QA) à l'aide de la question pour former un ensemble de réponses ; extraire des commentaires d'utilisateur concernant le produit à partir d'une base de données de commentaires pour former un ensemble de commentaires ; regrouper des mots-clés dans l'ensemble de réponses pour obtenir des centres de groupe ; filtrer l'ensemble de réponses et l'ensemble de commentaires à l'aide des centres de groupe pour obtenir un sous-ensemble de réponses et un sous-ensemble de commentaires ; et générer la réponse à la question à partir du sous-ensemble de commentaires, la réponse étant sélectionnée à partir du sous-ensemble de commentaires et présentant une similarité de phrases élevée avec des phrases dans le sous-ensemble de réponses.
Patent WO-2021174580-A1 (WO)
Inventor: XIANG ZHENG
IPC: G05D19/02
Filed: 2020-03-13
Abstract: Provided are a vibration control method which is applied to vibration devices of different models to realize the same preset tactile feedback. The vibration control method comprises: storing a vibration waveform of a preset tactile feedback in a cloud end; performing testing to acquire a difference parameter of a vibration device; inputting the difference parameter of the vibration device and the vibration waveform of the preset tactile feedback into a conversion model, wherein the conversion model converts the vibration waveform of the preset tactile feedback into an excitation signal on the basis of the difference parameter of the vibration device; and in response to the excitation signal, the vibration device vibrating to generate the preset tactile feedback. According to the vibration control method, the storage medium and the device provided in the present invention, a unified tactile feedback vibration waveform (such as an acceleration waveform) is used and stored, and a conversion model is used to convert the vibration waveform into various LRA excitation signals, such that the same or a similar tactile experience can be obtained between different devices.
Patent WO-2021017480-A1 (WO)
Title: End cover combination suitable for axial and circumferential motions and motor having same
Inventor: QIU CHUANSONG
IPC: H02K5/04
Filed: 2020-03-15
Abstract: Disclosed in the present utility model are an end cover suitable for axial and circumferential motions and a motor having the same. The end cover combination comprises an elastic member and a rotating member, wherein the rotating member is mounted on the elastic member, the elastic member can adapt to the axial reciprocating motion of a rotor, and the rotating member can adapt to the circumferential reciprocating motion of the rotor. The present utility model uses the combined end cover consisting of the elastic member and the rotating member for supporting a rotating shaft. The structure of the end cover can better adapt to the axial and circumferential motions of the rotating shaft, reduce the friction between the rotating shaft and the end cover and improve braking effects.