67results about How to "To achieve the purpose of self-locking" patented technology

The embodiment of the invention relates to a cavity filter, providing a screw device and a cavity filter which uses the screw device; the cavity filter is directly screwed into the cavity of the filter by a screw; the object of self-locking is achieved by changing the space of the thread; furthermore, as the nut is not required, the screw is tuned in the cavity and is self-locked; therefore, the cavity filter does not exceed the cavity and increases no thickness of the filter.

The invention discloses a self-locking bracket comprising bracket body having an archwire groove and a bracket opening, wherein two sides of the bracket opening are symmetrically provided with sliding grooves, insides of the sliding grooves are provided with vertical groove edges, a bracket cover is slidedly arranged in the sliding grooves, two sides of the bracket cover are provided with sliding strips cooperating with the sliding grooves, front ends of the sliding strips are provided with front wing hooks, a hollow groove and a lock groove in cooperation with the front wing hooks are respectively arranged at the groove edges of the sliding grooves at right side and left side of the archwire groove, a height of an entrance of the lock groove is smaller than a thickness of the front wing hooks, a height of the inside of the lock groove is greater than or equal to the thickness of the front wing hooks; when the bracket cover is open, the front wing hooks are hidden in the hollow groove and thus the archwire groove is exposed; and when the bracket cover is close, the front wing hooks enable the lock groove to be deformed when the front wing hooks pass through the entrance of the lock groove under external forces, so that after the front wing hooks are fully inserted into the lock groove, a purpose of self-locking by utilizing that the height of the entrance of the lock groove is smaller than the thickness of the front wing hooks can be achieved. The lock groove of the bracket is located in the bracket body, and can increase intensity of the bracket body and greatly shorten size of the bracket body.

The invention discloses a building outer wall body. The building outer wall body comprises a hollow base plate fixedly installed on a building outer wall face. More than one row of wall bricks are arranged on the outer side face of the hollow base plate at equal distance. Gap cavities are formed between every two rows of wall bricks. A locking and limiting mechanism is arranged in each gap cavityin a filling manner. The locking and limiting mechanisms are fixedly installed on the outer side face of the hollow base plate and used for compressing the wall bricks on the two sides. Each locking and limiting mechanism comprises a supporting bar. A moving bar is arranged at the outer side end of each supporting bar. Inserting grooves are formed in the two sides of each moving bar correspondingly. A limiting bar is arranged in each inserting groove. According to the building outer wall body, when a concrete sealing layer is broken, the moving bars are pushed out automatically, the limiting bars on the sides of the moving bars limit the wall bricks, and falling of the wall bricks can be prevented. By the adoption of less concrete materials, the hollow base plate is utilized for achievingstrong fixing of the wall bricks, and the hollow base plate can be utilized for improving the heat-preserving ability of a building body.

The invention discloses a general self-lock type insulating protection sleeve matched with quick-connection terminals, leading the quick-connection terminals to be easy to be inserted into and unlikely to get out of the protection sleeve. Stop parts for the terminals are arranged at the middle section of the insulating sleeve body of the protection sleeve; stop grooves for the terminals are respectively arranged at the front and the back sides of the face part of the stop parts for the terminals, while corresponding stop lug bosses for the terminals are formed at the front and the back sides of the inner wall of the face part of the stop part for the terminals; a terminal cavity is arranged between the stop grooves for the terminals and the entry holes of plugging sheets; a longitudinal guiding convex groove is arranged at the central part of the inner wall of the face part of the terminal cavity; drum-shaped side parts are arranged at both sides of the middle section of the insulating sleeve body of the protection sleeve. The general self-lock type insulating protection sleeve matched with quick-connection terminals is mainly applied to match with the 250 type quick-connection terminals of different specifications.

The invention discloses a self-locking type ring-shaped buckle for a scaffold. The self-locking type ring-shaped buckle for the scaffold comprises a first buckle body, a second buckle body and antislip blocks. The first buckle body and the second buckle body are both of semi-ring-shaped structures. The first end of the first buckle body is connected with the first end of the second buckle body in a hinged mode, the inner walls of the first buckle body and the second buckle body are both of conical-face structures, and a cone-shaped cavity body is formed through cooperation of the first buckle body and the second buckle body. The first side faces of the antislip blocks are partially-cylindrical cambered faces. The second side faces of the antislip blocks are opposite to the first side faces of the antislip blocks, and the second side faces are conical faces matched with the inner wall of the first buckle body or the inner wall of the second buckle body. The antislip blocks are arranged in the cone-shaped cavity body defined by the first buckle body and the second buckle body in an enclosed mode. Friction coefficient of the first side faces of the antislip blocks is larger than that of the second side faces of the antislip blocks. According to the self-locking type ring-shaped buckle for the scaffold, self-locking of the ring-shaped buckle can be achieved, the ring-shaped buckle is prevented from sliding downwards, and construction safety is guaranteed.

The invention relates to the field of prestress anchor cables, and discloses a self-tightening type prestress anchor cable. The self-tightening type prestress anchor cable comprises a locking section in a soil body, the locking section comprises an anchoring wire and a pressure-bearing section, the anchoring wire penetrates through the pressure-bearing section, the inner end of the anchoring wire is connected with a drilling head, the anchoring wire is connected with an expansion structure, the upper end of the expansion structure is fixedly connected with the lower end of the pressure-bearing section, and the lower end of the expansion structure is connected to the outer end of the drilling head. The expansion structure is provided with a plurality of supporting rods which expand outward in the vertical direction of the anchoring wire or are folded inwards. After prestress is applied to the prestress anchor cable and when the soil pressure or landslide thrust borne by the anchoring wire is increased, the drilling head is pulled to slide towards the outside of a hole, so that the expansion structure expands outwards in the vertical direction of the anchoring wire, in the expanding process of the expansion structure, the resistance borne by the expansion structure is larger, then deformation of the anchoring wire of the anchor cable is prevented, and the purpose of self-locking is achieved. The situation that external tension exceeds a designed allowable range and accordingly the anchor cable is damaged is effectively prevented.

The invention discloses a self-locking anti-drop elevator, which belongs to the technical field of geological drilling. It has the characteristics of self-locking of the elevator and preventing the oil pipe from falling off. It mainly includes the elevator body, the lifting lugs are installed symmetrically on both sides of the elevator body, the lifting lugs are provided with horizontal grooves, the lifting lugs are provided with vertical grooves, and the pin rods are fixed in the vertical grooves, and the pin rods are fitted with limited Position ring, the lifting lug is provided with an inner groove on the upper side of the horizontal groove, the inner groove is arranged on one side of the vertical groove, the inner groove is provided with a window on the upper side of the pin rod, and a loading block is installed in the inner groove, and the loading block includes a bottom plate , top plate and side plate, the inner side of the side plate is fixedly connected to the elastic piece, and the elastic piece is fixedly connected to the baffle plate. The bottom surface of the baffle plate is inclined and is between the bottom plate and the top plate. The loading block and the second vertical connecting rod, the top surface of the second vertical connecting rod is an inclined plane; an anti-falling device is also included, and the anti-falling device includes a telescopic cylinder, a PLC controller, a mobile power supply and a displacement sensor.

The present invention provides a motor with a retractable shaft extension, which comprises: a shaft body and a shaft extension: the shaft body is a hollow structure including a first inner cavity, the shaft extension can be inserted into the first inner cavity, and can be inserted in the first inner cavity. The inner cavity moves relative to the shaft body in the axial direction, and at least two snap-fit ​​positions in the axial direction can be formed between the shaft extension and the shaft body; or, the shaft extension is a hollow structure including a second inner cavity, and the shaft The body can be inserted into the second inner cavity and can move relative to the shaft extension in the axial direction in the second inner cavity, and at least two axially engaging positions can be formed between the shaft body and the shaft extension. According to the invention, the shaft extension length of the motor can be effectively adjusted according to the actual working conditions. When the motor workplace changes and the shaft extension length changes, there is no need to redesign a new motor scheme. To achieve the matching effect, enhance the versatility of the motor for various working conditions.

The invention discloses a self-locking float level switch. The self-locking float level switch comprises a non-magnetic pipe, a reed switch, a cylindrical passive float barrel, a float ball, a retainer, an upper magnetic limiting plate, a lower magnetic limiting plate and inner magnets. The cylindrical passive float barrel externally sleeves the non-magnetic pipe, the float ball externally sleeves the cylindrical passive float barrel, the retainer is arranged at the bottom end of the non-magnetic pipe, the upper magnetic limiting plate and the lower magnetic limiting plate are arranged at upper and lower ends of the cylindrical passive float barrel respectively, and the inner magnets are detachably arranged in the non-magnetic pipe. An annular magnet is hermetically arranged in the upper magnetic limiting plate, and the upper magnetic limiting plate is in positional correspondence to the reed switch under a contacted state of the bottom of the float barrel and the retainer. Independent magnets are arranged in the lower magnetic limiting plate, and opposite poles of the inner magnets in the non-magnetic pipe and the independent magnets in the lower magnetic limiting plate are identical in polarity. The self-locking float level switch has advantages that a self-locking effect can be achieved; due to a completely stable float magnetic field system, the float ball is prevented from fluctuating along with water level, magnetic field random variation is prevented, peripheral control circuit simplification is realized, and stability in operation of an execution electric appliance is achieved.