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公开(公告)号：US4299517A
公开(公告)日：1981-11-10
申请号：US114599
申请日：1980-01-23
CPC分类号： E21D23/16 , E21D23/0039 , E21D23/0427
摘要： The mine roof supporting structure comprises hydraulic props (3) which are pressing a swivelling cap (8) against the mine roof. A link lever (5) is pivotally linked to the floor frame (1) and a shield (4) is pivotally linked to the link lever (5) and to the cap (8). The shield (4) is pulled in direction to the floor frame (1) by means of a hydraulic tension strut (14). The working chamber (24) of the tension strut (16), which working chamber includes the piston rod and is facing the pivotal point (12) of the tension strut (16) to the shield (4), can be brought in connection with the supply conduit (19) for feeding pressurized fluid to the props (3) via a spring loaded check valve (22, 23), noting that the opening pressure of the spring (22) is smaller than the final supporting pressure exerted by the props (3). The piston surface of the working chamber (24) is smaller than the piston surface (4) delimiting the working chamber of the props (3). A change-over valve (25) is provided for connecting in one position the supply conduit (19) and in the other position a separate conduit (28) for pressurized fluid with the hydraulic tensions strut (14), noting that in the other position the connection between the conduit for pressurized fluid and the working chamber (21) of the props is closed (FIG. 3).
摘要翻译： 矿顶支撑结构包括将旋转盖（8）压靠在矿顶上的液压支柱（3）。 连杆（5）可枢转地连接到地板框架（1），并且屏蔽件（4）可枢转地连接到连杆（5）和盖（8）。 屏蔽件（4）通过液压张紧支柱（14）被拉向地板框架（1）。 张力支柱（16）的工作室（24），其工作室包括活塞杆并面向张力支柱（16）到屏蔽件（4）的枢转点（12），可与 供应管道（19），用于经由弹簧加载的止回阀（22,23）将加压流体供给到道具（3），注意到弹簧（22）的打开压力小于由道具施加的最终支撑压力 （3）。 工作室（24）的活塞表面小于限定道具（3）的工作室的活塞表面（4）。 提供了一个转换阀（25），用于在供应管道（19）的一个位置和另一个位置上连接用于加压流体与液压张紧支柱（14）的单独导管（28），注意到在另一位置 用于加压流体的导管与道具的工作室（21）之间的连接是封闭的（图3）。
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公开(公告)号：US4147391A
公开(公告)日：1979-04-03
申请号：US854025
申请日：1977-11-22
CPC分类号： E21C31/10 , E21D9/1026
摘要： A swivel mechanism for kerf-cutting machines comprising a cutter arm, which carries the cutting tool, in which mechanism the cutter arm is pivoted to a swivel head on a horizontal axis for a vertical angular movement, said swivel head is pivoted on an approximately vertical axis to a bearing disc, which is rigidly connected to the frame of the cutting machine and has an outer annular zone that is engaged on both sides by sliding surfaces of the swivel head, and swivel drive means are provided for imparting angular movements to the swivel head, characterized in that the swivel drive means comprise two racks, which are mounted in the swivel head for movement in mutually opposite directions, which are parallel to the vertical center plane of the cutter arm, and a pinion is connected to and coaxial with the bearing disc and is in mesh with said racks at diametrically opposite points of said pinion.
摘要翻译： 一种用于切割切割机的旋转机构，包括：切割臂，其承载切割工具，在该机构中，切割臂在水平轴线上枢转到旋转头以进行垂直角度运动，所述旋转头在大致垂直方向上枢转 轴向到轴承盘，该轴承盘刚性地连接到切割机的框架并且具有通过旋转头的滑动表面在两侧啮合的外部环形区域，并且设置旋转驱动装置以向旋转体施加角度运动 头部，其特征在于，所述旋转驱动装置包括两个齿条，其安装在所述旋转头中，用于在与所述切割臂的垂直中心平面平行的彼此相反的方向上运动，并且小齿轮连接到所述旋转头 并且与所述齿条在所述小齿轮的直径相对的点处与所述齿条啮合。
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公开(公告)号：US5498069A
公开(公告)日：1996-03-12
申请号：US351179
申请日：1994-11-09
申请人： Gottfried Siebenhofer , Alfred Zitz , Roman Gerer
发明人： Gottfried Siebenhofer , Alfred Zitz , Roman Gerer
IPC分类号： E21C35/18 , E21C35/187 , E21C35/197 , B23B31/10
CPC分类号： E21C35/187 , E21C35/197 , E21C2035/1826
摘要： The bit holder (1) is nonpositively connected to a bit bushing (3) with adherence to a pressure per unit of surface area of >100N/mm.sup.2 between the conical outer surface of the bit bushing (3) and the inner wall of the receiving bore (2) of the bit holder (1). After the bushing has been driven into the receiving bore (2), the conical outer surface of the bit bushing (3), formed by rectilinear generatrices, protrudes beyond the bore (2) by an excess amount (a).
摘要翻译： 钻头夹持器（1）在钻头套管（3）的圆锥形外表面和接收件的内壁之间以单位表面积> 100N / mm2的压力粘结到钻头套管（3） 钻头夹持器（1）的孔（2）。 在衬套已经被驱动到接收孔（2）中之后，由直线母线形成的钻头套管（3）的锥形外表面超出孔（2）超过量（a）。
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公开(公告)号：US4197035A
公开(公告)日：1980-04-08
申请号：US958684
申请日：1978-11-08
CPC分类号： E21D23/066 , E21D23/0427
摘要： It is an object of the invention to provide an improved shield-carrying roof support unit which has a linkage for adjusting the elevation of the cap while the pivotal connection between the cap and the shield is constrained to move substantially at right angles to the base frame. The provision of auxiliary links having pivotal connections at properly selected points results in a linkage which has a precisely defined configuration and avoids an overloading of the pivotal connections such as could occur in known shield-carrying roof support units of the same kind.
摘要翻译： 本发明的一个目的是提供一种改进的屏蔽承载屋顶支撑单元，其具有用于调节盖的高度的联动装置，同时盖和屏蔽件之间的枢转连接被限制为基本上与基架成直角地移动 。 在适当选择的点处提供具有枢转连接的辅助链节导致具有精确限定的构造的联动装置，并且避免了枢转连接的过载，例如可能发生在同一类型的已知的护罩运载屋顶支撑单元中。
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公开(公告)号：US06257671B1
公开(公告)日：2001-07-10
申请号：US09407962
申请日：1999-09-29
IPC分类号： E21C2724
CPC分类号： E21C27/24 , E21C35/043
摘要： The invention relates to a device for protecting selective cutting machines against overload, in which the selective cutting machine has cutting tools, in particular cutting rollers, rotatably supported on a pivotable cantilevered arm, and both the cutting tools and the cutting arm are connected to separate drive mechanisms. At least one strain or deformation measuring sensor is disposed on the pivotable cantilevered arm, and its signals are delivered to an evaluation circuit; the evaluation circuit is connected via control lines at least to the drive mechanisms of the cutting arm and the cutting tool.
摘要翻译： 本发明涉及一种用于保护选择性切割机器免受过载的装置，其中选择性切割机具有可旋转地支撑在可枢转悬臂上的切割工具，特别是切割辊，并且两个切割工具和切割臂分别连接 驱动机制。 至少一个应变或变形测量传感器设置在可枢转的悬臂上，其信号被传送到评估电路; 评估电路至少通过控制线连接到切割臂和切割工具的驱动机构。
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公开(公告)号：US4555143A
公开(公告)日：1985-11-26
申请号：US594524
申请日：1984-03-29
IPC分类号： E21C35/18 , E21C35/187 , E21C35/22 , E21C35/23 , E21C37/06
CPC分类号： E21C35/18 , E21C35/187 , E21C35/23 , Y02P40/30
摘要： For cutting rock by means of cutting head (1) having its bits (24) cooperating over a limited axial shifting stroke (a) with a cylinder-piston-aggregate, for example a valve (18), it is proposed to intermittently subject the cylinder-piston-aggregate to the action of pressurized fluid, thus exposing the bit (24) during its engaging the rock to percussion forces. During the phases lacking any action of pressurized fluid onto the cylinder-piston-aggregate, the bit (24) shall be pushed into its starting position. This embodiment can be realized with both hydraulic and pneumatic cylinder-piston-aggregates, noting that in case of an embodiment having a hydraulic cylinder-piston-aggregate it is preferred to design this cylinder-piston-aggregate as a valve (18) which simultaneously provides the possibility to expel pressurized liquid via a spraying nozzle (32) onto the mine face. (FIG. 2)
摘要翻译： 为了通过具有其位（24）的切削头（1）切割岩石，所述钻头（24）在有限的轴向移动行程（a）上与气缸 - 活塞 - 集料（例如阀）（18）配合，建议间歇地对待 气缸 - 活塞 - 聚集到加压流体的作用下，从而使钻头（24）在其接合岩石期间暴露于敲击力。 在没有加压流体到缸 - 活塞 - 集料的任何作用的阶段期间，钻头（24）应被推入其起始位置。 该实施例可以通过液压和气动缸 - 活塞 - 集料来实现，注意到在具有液压缸 - 活塞 - 集料的实施例的情况下，优选地将该缸 - 活塞 - 集料设计为同时的阀（18） 提供通过喷嘴（32）将加压液体排出到矿井面上的可能性。 （图。
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公开(公告)号：US4404893A
公开(公告)日：1983-09-20
申请号：US887774
申请日：1978-03-17
摘要： A hydraulic mine prop includes an inner piston-like prop guided within an outer cylinder-like prop, and a roof fall valve. The interior space of said inner prop communicates freely with the working chamber of the prop, and the roof fall valve is arranged outwardly on the prop and rigidly secured thereon, the valve being connected to the working chamber by an orifice provided in the prop and leading to the working chamber. The cross-sectional area of the roof fall valve in its open position.
摘要翻译： 液压矿井支柱包括在外圆柱状支柱内引导的内部活塞状支撑件和屋顶坠落阀。 所述内支架的内部空间与支柱的工作室自由地连通，并且屋顶下降阀向外布置在支柱上并刚性地固定在其上，该阀通过设置在支架中的孔口连接到工作室 到工作室。 屋顶下降阀的截面积处于打开位置。
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公开(公告)号：US4344354A
公开(公告)日：1982-08-17
申请号：US121583
申请日：1980-02-14
CPC分类号： F15B15/16
摘要： The telescopically extendable prop (1) has at the periphery of the intermediate prop (3) abutments (30) which cooperate with a valve (15) before the intermediate prop (3) has attained its highest extended position. The valve (15) stops the extending stroke of the intermediate prop (3) and is releasing the beginning of the extending stroke of the top prop (4). As soon as a predetermined pressure is built up in the consolidating conduit (10) of the top prop (4), the valve (27) subjected to this pressure is overacting the valve (15) cooperating with the abutments (30) of the intermediate prop (3), whereupon the consolidating stroke is completed by pressurizing the intermediate prop (3) with pressurizing fluid. (FIG. 1)
摘要翻译： 在中间支撑件（3）已经达到其最高延伸位置之前，可伸缩延伸的支承件（1）在中间支撑件（3）邻接件（30）的周边处具有与阀门（15）配合的外围。 阀（15）停止中间支柱（3）的延伸行程，并且释放顶部支柱（4）的延伸行程的开始。 一旦在顶部支柱（4）的固结管道（10）中建立了预定的压力，则经受该压力的阀门（27）就越过与中间件（30）的邻接件（30）配合的阀门（15） 支柱（3），通过用加压流体对中间支柱（3）进行加压来完成固结行程。 （图。
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公开(公告)号：US4111227A
公开(公告)日：1978-09-05
申请号：US719653
申请日：1976-09-01
IPC分类号： F16K17/04 , E21D15/51 , E21D23/16 , F16K17/08 , F16K31/363
CPC分类号： E21D23/16 , E21D15/512 , F16K17/082 , Y10T137/7738 , Y10T137/7781
摘要： A pressure relief valve for hydraulic mine supporting elements, particularly mine props, has a valve member loaded in its closing direction by a spring, a piston is connected to the valve member end sealingly sliding within a cylinder of the valve housing and arranged to be acted upon in closing direction by the pressure prevailing within the space before the seat of the valve member. The valve member has a neck portion of reduced diameter between the valve seat and the piston and the annular cross section, being acted upon in closing direction, between the neck portion and the circumference of the piston is smaller than the annular cross section, being acted upon in opening direction, between the neck portion and the valve seat.
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