34results about How to "Guaranteed stable clamping" patented technology

The invention relates to the field of screw twisting tools, in particular to a screw twisting device. The screw twisting device comprises a first clamping component, wherein the first clamping component is rotationally assembled with a second clamping component through a rotating shaft; a hook structure matched with a screw is arranged on the first clamping component; a first clamping surface is arranged on the hook structure; a second clamping surface is arranged on the second clamping component; the first clamping component and the second clamping component are matched, so that the first clamping surface and the second clamping surface clam the screw when the second clamping component is rotated to a set position. Compared with the conventional screw twisting device, the screw twisting device provided by the invention does not need to tap the screw, is convenient to operate and high in screw removing efficiency, and solves the problems that the conventional decapitated bolt removing structure is inconvenient to operate and is low in screw removing efficiency.

The invention provides automatic sealing equipment. The equipment is reasonable in structural design, easy in operation, and capable of conducting automatic sealing. The equipment comprises a rack, wherein a sealing device used for sealing packaging bags is arranged on the rack, a material receiving device used for receiving and conveying the packaging bags is arranged on the rack, the material receiving device comprises a material receiving groove which is provided with a cavity used for containing the packaging bags, a first driving mechanism used for driving the material receiving groove toconvey the packaging bags is arranged on the rack, and a material conveying mechanism used for clamping the packaging bags in the material receiving groove to the sealing device is arranged between the material receiving groove and the sealing device.

The invention discloses a clamping device and method, the clamping device comprises a three-jaw chuck module and more than two auxiliary modules, and each auxiliary module comprises three groups of auxiliary units; the three-jaw chuck module comprises a cylindrical bracket and three groups of clamping jaw units which are uniformly arranged along the circumference of the cylindrical bracket; a group of auxiliary units are arranged on the cylindrical bracket at the position opposite to each group of clamping jaw units; in each auxiliary module, at least two auxiliary units in the three auxiliary units are supporting units, each supporting unit comprises a linear driving part, a force feedback element and a clamp head, and the linear driving part drives the clamp head to penetrate through the cylindrical support and move towards or away from the corresponding clamping jaw unit; the force feedback element is used for obtaining surface acting force of the clamp head. According to the clamping equipment, the target workpiece can be pre-clamped through linkage adjustment of the multiple auxiliary units, then the target workpiece is actually clamped through the clamping jaw unit, the centering performance of the clamped target workpiece can be guaranteed, and the clamping precision of the target workpiece is improved.

The invention discloses a fixing device for bearing production in favour of avoiding springback. The fixing device comprises a housing and a pushing frame, wherein an adjusting cavity is arranged in the housing; the rear end face of an adjusting rod is connected with driving teeth, and the outer side of the driving teeth is connected with a driving wheel; a driving rod is arranged in the driving wheel; the pushing frame is arranged outside a first pushing rod, the inner side of the pushing frame is provided with a connecting arm, and the outer side of the top of the connecting arm is providedwith a fixing seat; and the top end of the connecting arm is connected with a first clamping plate. The fixing device for bearing production in favour of avoiding the springback is easy to operate, isconducive to ensuring the accurate position of a bearing and is convenient to feed and discharge at the same time, is conductive to producing the bearing rapidly, and can ensure that a clamping device cannot spring back after adjusting and clamping, so that the stable clamping of the bearing part is ensured, and thus the stable machining and using of the bearing part is facilitated.

The invention discloses a portal crane capable of switching over clamps and used for a hardware pipe fitting, and relates to the field of hardware machining equipment. The portal crane capable of switching over clamps and used for the hardware pipe fitting comprises a crane frame, a clamp hoisting frame and clamp switchover rolls, wherein a winding reel arranged on a hoisting shaft on the crane frame is wound with traction ropes; the hoisting shaft is connected with the clamp hoisting frame through two traction ropes; the clamp hoisting frame is connected with two pairs of clamp switchover roll support columns through slide rods; one clamp switchover roll is rotationally connected between the lower ends of each pair of the clamp switchover roll support columns; a square pipe clamping groupis arranged at one side of each clamp switchover roll; and a circular pipe clamping group is arranged at the other side of each clamp switchover roll. According to the portal crane capable of switching over the clamps and used for the hardware pipe fitting, a rotary wheel is rotated, each pair of the clamp switchover roll support columns is controlled to move under the condition of adjusting thethread relationship of a screw rod and a screw rod seat, a distance between the clamp switchover rolls arranged at the lower ends of the two pairs of clamp switchover roll support columns is adjusted,the clamps arranged on the two groups of clamp switchover rolls clamp the pipe fitting, and the operation is convenient.

The invention discloses a welding clamp of an extensible aluminum alloy window body. The welding clamp comprises two parallel lower slide rails arranged at an interval, wherein the two lower slide rails are in sleeved connection with two lower slide seats, upper slide rails perpendicular to the lower slide rails are installed on the lower slide seats through fasteners, and the other end of each upper slide rail is installed on the lower slide seat in sleeved connection with another lower slide rail. Each upper slide rail is in sleeved connection with two upper slide seats, and limiting grooves are fixedly connected to the upper slide seats. Any adjustment on clamp size can be achieved, and the welding clamp can meet the welding requirements of different sizes of windows and has the advantages of being simple and convenient to operate, high in using flexibility, simple in structure and the like.

The invention discloses a method for installing a curved steel reticulated shell structure with a gable starting span gradually changing, comprising the following steps: a. construction preparation; b. assembling block by block; c. installing a purlin system and a roof panel structure. The invention realizes the connection between the steel wire rope and the ball joint through the steel wire rope pulling device, ensures the stability of the steel wire rope pulling and setting, prevents the steel wire rope from sliding, ensures the verticality of the vertical gable structure, and avoids the rods of the reticulated shell structure during the steel wire rope pulling. At the same time, in the present invention, the ball joints inside the gable reticulated shell unit are supported by the temporary fixing device to increase the construction safety performance, and the temporary fixing device can also eliminate the influence of the site flatness error on the installation accuracy, which is more conducive to the ball joints The installation and construction between temporary fixtures are convenient for construction and operation, flexible and convenient for on-site construction, easy to adjust accuracy errors, high construction efficiency, guaranteed installation quality, reduced safety hazards for high-altitude operations, and reduced construction costs.

The invention relates to the field of screw twisting tools, in particular to a screw twisting device. The screw twisting device comprises a first clamping component, wherein the first clamping component is rotationally assembled with a second clamping component through a rotating shaft; a hook structure matched with a screw is arranged on the first clamping component; a first clamping surface is arranged on the hook structure; a second clamping surface is arranged on the second clamping component; the first clamping component and the second clamping component are matched, so that the first clamping surface and the second clamping surface clam the screw when the second clamping component is rotated to a set position. Compared with the conventional screw twisting device, the screw twisting device provided by the invention does not need to tap the screw, is convenient to operate and high in screw removing efficiency, and solves the problems that the conventional decapitated bolt removing structure is inconvenient to operate and is low in screw removing efficiency.

The invention relates to the technical field of medical devices, in particular to a limb protection device for clinical use in pediatric surgery, which includes a fixed frame, a clamping mechanism is arranged inside the fixed frame, a support frame is arranged outside the fixed frame, and a support frame is used between the support frame and the fixed frame. Mechanism connection, the lower side of the support frame is provided with a mounting seat, and the mounting seat and the support frame are connected by a lifting mechanism. In the present invention, by setting a clamping mechanism, the clamps on both sides of the upper and lower sides can be used under the action of the driving mechanism to realize the treatment of children with different sizes. The clamping of the limbs makes the device more applicable. By setting the clamp and using the pressure sensor, it is possible to avoid increasing the pain of the child patient due to excessive extrusion force during the fixation process. On the premise of ensuring stable clamping , so that the comfort of children patients is improved.

The invention discloses an aircraft tire clamping and lifting device, and relates to the technical field of aircraft tire clamping and lifting devices. The aircraft tire clamping and lifting device comprises a U-shaped supporting plate, a U-shaped base and clamping devices. The U-shaped base comprises a straight plate. Two side plates are symmetrically fixed to the two ends of the straight plate.Each clamping device comprises an arc seat. One side face of each arc seat is an arc face. An arc clamp plate is fixed to each arc face. Arc protection plates are fixed to the two side faces of each arc clamp plate. A tire groove channel is defined by each arc clamp plate and the corresponding two arc protection plates. The invention further provides a control system of the aircraft tire clampingand lifting device. According to the aircraft tire clamping and lifting device, the two symmetric clamping devices are fixed to the two side plates, meanwhile, the two clamping devices are controlledby first telescopic devices to move relatively to clamp aircraft wheels, each tire groove channel defined by the corresponding arc clamp plate and the corresponding two arc protection plates is matched with aircraft tires, and clamping stability is improved; and meanwhile, second telescopic devices are used for lifting the clamping devices, and mounting and repairing of the aircraft wheels are facilitated.

The invention discloses a control rod driving mechanism which comprises a machine seat, a motor, a transmission rod, a hollow shaft, an ejector rod and at least three grippers, wherein the hollow shaft is fixedly connected with the machine seat; the inner wall of the hollow shaft is provided with a thread area; the side wall of the ejector rod is provided with an external thread; the ejector rod is contained in the hollow shaft and is in threaded matched with the thread area; the motor is fixed on the machine seat and is used for driving the transmission rod to rotate; the lower end of the transmission rod extends into the hollow shaft and is connected with the ejector rod in a way of circumferential location; the grippers are pivoted on the side wall of the hollow shaft; a blocking hook surface which extends towards the central axis of the hollow shaft and is inclined downwards is formed on the lower end of each gripper; the upper ends of the grippers are pushed downwards by the ejector rod, and the blocking hook surfaces of the at least three grippers are driven to clamp a control rod together. The assembly and disassembly of the control rod driving mechanism and the control rod are convenient and fast, and the risk of releasing of the control rod can be effectively reduced. Correspondingly, the invention also provides a connecting way of the control rod driving mechanism and the control rod.