30results about How to "Ensure stable positioning" patented technology

Stereolithography machine (1) comprising: a supporting frame (2); a tank (3) suited to contain a liquid substance; a supporting plate (4) associated with the supporting frame (2), suited to support the tank (3); a stopping unit (5) suited to firmly hold the tank (3) on the supporting plate (4) in a resting position; emitter means (6) suited to direct a predefined electromagnetic radiation (6a) towards the tank (3); a holding unit (7) of the tank (3) operatively associated with the supporting plate (4) through first actuator means (8) configured so as to move the tank (3) with respect to the supporting plate (4) according to a predefined trajectory of movement. The stopping unit (5) comprises second actuator means (17) that define for the stopping unit (5) an active configuration for holding the tank (3) and a rest configuration for releasing the tank (3).

A cup for an eyepiece of an optical observation instrument, comprises a peripheral wall which includes an eyepiece-connecting section for connection of the cup to an eyepiece, a transition section which adjoins the eyepiece-connecting section, a light-protecting attachment which, by way of a sectional part of the transition section, is joined to a side of the transition section that is turned away from the eyepiece-connecting section; a sight hole which is laterally defined by the peripheral wall; the peripheral wall being movable into a first, non-folded end position for someone who does not wear spectacles for preclusion of any incidence of stray light upon an eyepiece lens, and into a second, folded end position for spectacle wearers; and into a third stable position of ventilation, located between the first and the second end position, for someone not wearing spectacles.

A medical punch with a hollow shaft, a tool point that is positioned on the distal end of the shaft and includes a rigid cutting part and a cutting part that can slide with respect to the rigid cutting part, and with a handle positioned on the proximal end of the shaft, such that the displaceable cutting part and the handle are operatively connected with one another by a push / pull device that is displaceably mounted in the hollow shaft and an anti-tilt mechanism is positioned on the tool point to stabilize the cutting parts in their axially parallel alignment to one another. The rigid cutting part includes a sleeve-shaped proximal portion that encloses the displaceable cutting part and a distal punch portion configured as a single unit with the sleeve-shaped portion and that the rigid cutting part should be detachably connected with the hollow shaft by a coupling mechanism formed on the sleeve-shaped portion.

A device to increase the stowage capacity of vehicles that comprises a fabric, box-like or cylindrical shaped receptacle and primary support straps and tie down straps to mount the receptacle on the rear or side of a vehicle and to minimize sway of the receptacle when the vehicle is in motion.

The invention provides a die capable of steadily realizing retraction core pulling, relating to the technical field of die equipment. The die comprises an upper die seat, a forming fixing block, a forming component, a retraction component, a fixed plate, a lower die seat, a thimble component, two angle pins, two side core pulling components and two spacer components, wherein the forming fixing block is used for playing a positioning role before parting for the forming component; the forming component and the retraction component are used for forming a product; a forming part does a retractionmotion approaching to the axle wire of a retraction guide block under the driving of a limiting part, so as to realize demoulding of the formed product; a thimble contacts with the top end of the inner surface of a forming workpiece, and in mould opening, a support spring is in a resilience state continuously to realize supporting and fixing of the forming workpiece after the thimble retracts in the retraction component. The die capable of steadily realizing retraction core pulling is simple in structure, can effectively form a workpiece with an internal buckle, and can realize steady supportof the workpiece after forming.

The invention relates to a charged particle system provided with a support and positioning structure for supporting and positioning a target on a table, the support and positioning structure comprising a first member and a second member and at least one motor so as to move the first member relative to the second member, wherein a shield is present to shield at least one charged particle beam from electromagnetic fields generated by said at least one motor, the support and positioning structure further comprising a spring mechanically coupling the first member and the second member for at least partially bearing the weight of the first member, table and target.

The invention provides a multimedia teaching device for college English education, which belongs to the technical field of English teaching multimedia desks, so as to solve the problem that when the above-mentioned multimedia learning desk for English learning is in use, the multimedia equipment of the learning desk is placed on the desktop, and in the classroom It is very easy to be polluted by chalk dust in the environment, and the multimedia equipment is not easy to clean, and it is easy to block the line of sight, and it is not convenient for students to look at the front blackboard, including the lower table body; the two sides of the upper table board are fixedly connected to the lower table body. two side walls; the inner push frame is provided with two places, and the two inner push frames are slidably connected between the lower table body and the upper table board; the swing shaft of the multimedia teaching screen is hingedly connected to the end of the inner push frame; It can be seen that the storage method of multimedia components is improved compared with the existing teaching desk for English learning, which can greatly reduce the impact of dust in the classroom on the multimedia equipment, and reduce the probability of the multimedia equipment being damaged due to dust.

The invention relates to a workpiece positioning device, specifically a positioning tool for engine detection. The tool comprises a supporting platform, and the supporting platform is provided with afirst sliding rail. One side of the supporting platform is hinged to a sliding table, and the sliding table is provided with a second sliding rail. The first sliding rail and the second sliding rail are connected with each other, and a material carrying vehicle is disposed above the sliding table and is provided with a positioning tube. The positioning tube vertically passes through the material carrying vehicle, and one end of the positioning tube extends above the material carrying tube. The bottom of the material carrying vehicle is provided with a roller, and the roller is slidingly connected with the first sliding rail and the second sliding rail. A chute is disposed above the sliding table, and the interior of the chute is slidingly provided with a supporting rod. One end of the supporting rod is connected with a pressing plate, the bottom of the pressing plate is provided with a positioning pin, and the other end of the supporting rod abuts against the free end of the sliding table. The sliding table is slidingly connected with the chute. The tool solves a problem that the operation difficulty is bigger in the prior art during the engine detection.

The invention relates to a workpiece positioning device, specifically a positioning tool for engine detection. The tool comprises a supporting platform, and the supporting platform is provided with afirst sliding rail. One side of the supporting platform is hinged to a sliding table, and the sliding table is provided with a second sliding rail. The first sliding rail and the second sliding rail are connected with each other, and a material carrying vehicle is disposed above the sliding table and is provided with a positioning tube. The positioning tube vertically passes through the material carrying vehicle, and one end of the positioning tube extends above the material carrying tube. The bottom of the material carrying vehicle is provided with a roller, and the roller is slidingly connected with the first sliding rail and the second sliding rail. A chute is disposed above the sliding table, and the interior of the chute is slidingly provided with a supporting rod. One end of the supporting rod is connected with a pressing plate, the bottom of the pressing plate is provided with a positioning pin, and the other end of the supporting rod abuts against the free end of the sliding table. The sliding table is slidingly connected with the chute. The tool solves a problem that the operation difficulty is bigger in the prior art during the engine detection.

The invention discloses a clamp for turning a universal joint. The clamp comprises a first locating mechanism used for locating a universal joint work-piece (1) in the vertical shaft direction of the universal joint work-piece (1), and a second locating mechanism used for locating the universal joint work-piece (1) in the horizontal shaft direction of the universal joint work-piece (1). The first locating mechanism and the second locating mechanism can locate the universal joint work-piece in the vertical shaft direction and the horizontal shaft direction at the same time, and therefore the universal joint work-piece can be clamped in a centring mode, firm locating in the turning process is guaranteed, and the coaxiality of two cylindrical shafts on the two sides of a machined cylindrical shaft is guaranteed. The clamp can clamp and locate the universal joint work-piece accurately.

The invention discloses a fixing force transfer bracket for a thermodynamic pipe in a thermodynamic shield tunnel, which is distributed on the inner wall of the tunnel at intervals. The tunnel is formed by combining prefabricated pipe pieces, two circles of ring beams are fixed on the inner wall of the tunnel by double-arched fixing pieces, two or four upright posts are fixed between the two circles of the ring beams, two ends of each upright post are supported on two sides of the inner wall of the tunnel, and front side and back side of each two upright posts are connected with a stressed frame used for passing through the thermodynamic pipe respectively. The fixing force transfer bracket solves the fixing problem of the thermodynamic pipe in the thermodynamic shield tunnel, so that the thermodynamic pipe can bear the horizontal push-pull force of pipes in the axial direction and the side direction. Under the action of the horizontal push-pull force, a fixing bracket system can evenly transfer the horizontal push force to six prefabricated pipe pieces. The prefabricated pipe pieces move evenly under the action of an external force, and simultaneously relative displacement is not produced among the prefabricated pipe pieces.

The invention relates to an angle face clamping device. A positioning assembly is arranged at one end of a base plate and the other end of the base plate is provided with a fork seat. One end of the fork seat is connected with a pressing plate in a moving mode through a straight pin. One end of the pressing plate is provided with a pressing block. The front end of the pressing block is of a semi-cylindrical structure and bends downwards to form an angle along the surface of the pressing plate. Opened grooves which are opposite to each other in position are formed in the fork seat and the pressing plate respectively. Bolts are arranged in the opened grooves and handle nuts are in threaded connection with the upper portions of the bolts and press the pressing plate. The angle face clamping device can rapidly position parts and is simple in clamping method and capable of improving processing efficiency and ensuring the quality of processed parts.

A spectacle frame includes a front face and temples connected thereto by hinges. Each hinge includes a hollow attachment member, respectively rigidly connected to the front face and to the temples, and each receives a hinging member having its free end provided with a hinge pin, such that the hinge pins are perpendicular to each other. The attachment members define a cylindrical sheath. The hinging members each include a rod, intended to be received in the respective sheath, one of the ends of the rod being provided with an abutment and the other end being provided with the hinge pin, each of the rods receiving a sliding ring submitted to the action of a spring bearing against the abutment, the ring being rigidly connected to the corresponding attachment member near its free end. The hinge pins of the hinging members are rigidly connected to each other by a connection member.