42results about How to "Prevent free sliding" patented technology

The invention discloses a height adjusting device for surveying and mapping. The device comprises a bottom plate, a tripod and a supporting plate. The bottom plate is a circular plate, the upper end face of the bottom plate is provided with sliding grooves which are each of an arc structure, the distance D1 between the head end of each sliding groove and the center of the bottom plate is larger than the distance D2 between the tail end of each sliding groove and the center of the bottom plate, the three grooves are evenly arranged in the circumferential direction, the tripod comprises three telescopic rods, the lower ends of the telescopic rods are hinged to sliding rods, the sliding rods are in sliding fit with the sliding grooves, the bottom of each sliding groove is provided with multiple blind holes, and the lower ends of the sliding rods are in inserted connection fit with the blind holes. By means of the eccentric sliding grooves, the height of a whole supporting device is accurately and finely adjusted to be kept consistent with the height of a measured target, and practical using significance is great.

The present invention provides a separable fitting (1) in which a box pin (20, 20') has a box pin body (21, 21'), a first cutout (23, 23') for receiving the head end of a locking pawl (36) of a reverse opening slider (30), and a projection (24, 24') projecting toward an insert pin (10) in the direction of the tape width from a surface (26) opposed to the insert pin (10). A side wall surface (23b) of the first cutout (23, 23') and that end surface (24a) of the projection (24, 24') which is provided to the head end side of the box pin are formed flush with each other to form a locking surface (27) with which the head end of the locking pawl (36) makes contact to lock the reverse opening slider (30). The box pin body (21, 21') and the projection (24, 24') have a slope surface (28, 28') declined from the position of the locking surface (27) toward an element row (5). The construction enhances easiness of operation of the reverse opening slider (30) and reliably prevents the reverse opening slider (30) from freely sliding from the box pin-side end of the element row without being slid by human force.

The invention relates to the field of hardware fitting placement frames, in particular to a hardware fitting placing frame which comprises a main body, a moving mechanism, a placement mechanism, a fixing mechanism, a telescopic mechanism and an extension mechanism. Through the arrangement of the moving mechanism, the placing frame can stably pass through an uneven road surface, and hardware fittings are prevented from becoming messy or falling and being lost in the bumping process; through the arrangement of the placement mechanism, the space in the placing frame can be freely adjusted, and the hardware fittings of different sizes can be placed conveniently; through the arrangement of the fixing mechanism, a pull rod can be fixed when is not needed, and the randomly placed pull rod can beprevented from occupying the limited working space; through the arrangement of the telescopic mechanism, the height of the pull rod can be freely adjusted, and the user experience of the placing frameis improved; and through arrangement of the extension mechanism, the area of the top end of the main body can be enlarged, and thus more hardware fittings or hardware fittings with larger sizes can be placed at the top end of the main body.

The invention relates to a controllable segmental anchorage device for unbonded tendons as well as an assembly method and application thereof and belongs to the field of prestressed concrete structure application. The controllable segmental anchorage device comprises a bidirectional anchor cup, left clamping pieces, a spring, an inhaul cable and right clamping pieces, wherein a through hole is reserved in the axis of the long direction of the bidirectional anchor cup, and a vertical hole is formed in the upper part of the bidirectional anchor cup; the left (right) clamping pieces are 2-3 conical clamping pieces, an oblique perforated ear plate is arranged on the tail part of each left (right) clamping piece, and the inclined direction of the oblique perforated ear plates is opposite to the conical direction of a left conical hole; the spring is connected to the oblique perforated ear plates at the tail parts of the left clamping pieces and the right clamping pieces; the inhaul cable penetrates through the spring, and two ends of the inhaul cable penetrate through the vertical hole of the bidirectional anchor cup; through changing the working condition of the controllable segmental anchorage device, the purpose of segmenting multi-span continuous prestressed girders is realized, so that the purposes of reducing the prestress loss and avoiding the influence on the full span and the mutual influence between the spans are achieved.

The invention discloses a quick-closing valve and belongs to the technical field of steam valves. The quick-closing valve comprises a quick-closing valve seat, a quick-closing valve body, a quick-closing valve element, a drive oil cylinder, a control mechanism and a control oil cylinder. The quick-closing valve seat is provided with a steaming opening. The quick-closing valve body can be arranged on the steaming opening in an opening and closing manner. The two ends of the quick-closing valve element are fixedly connected with the quick-closing valve body and a drive piston of the drive oil cylinder correspondingly. The end, away from the drive piston, of the drive oil cylinder is provided with an installation hole, and a second oil discharging port is formed in the side wall of the installation hole. The control mechanism comprises a sliding rod, a first connecting rod and a second connecting rod. The sliding rod is movably arranged in the installation hole, and an oil inlet channel capable of communicating with the second oil discharging port is arranged in the sliding rod. The first connecting rod is connected to the sliding rod in a lapping manner and is rotationally connected with one end of the second connecting rod. The second connecting rod is connected with the control oil cylinder through an elastic part. A control piston rod of the control oil cylinder is separably arranged at the end portion of the sliding rod. According to the quick-closing valve, the problem of insufficient operation safety caused by automatic opening of the quick-closing valve due to electronic control misoperation can be avoided.

The invention discloses an improved latch needle which comprises a needle head, a needle neck, a needle body and a needle butt, wherein the needle head includes a beard and a latch. On an a side of the latch needle, a pore is arranged on the needle neck in a direction in which the needle neck faces the needle head, the small end of a first spring piece is inserted in the pore, and the other end of the first spring piece is fixed on the needle body. On a b side of the latch needle, an elongated groove is milled in the middle of the needle body, a second spring piece is disposed in the groove, one end of the second spring piece, which faces the needle butt, is inserted in the groove, and the other end of the second spring piece is fixed in the groove. According to the improved latch needle, contact areas between the spring pieces and needle grooves are enlarged, the latch needle is enabled to work in the needle grooves more stably by means of tension of the spring pieces, knitting accuracy is guaranteed, durability of the spring pieces is improved, and the needle butt of the latch needle is not needed to be processed to be arc-shaped any more.

The invention discloses a multifunctional tool shovel for building construction. The shovel comprises a telescoping mechanism, an anti-slip sleeve, a supporting mechanism and a digging mechanism. According to the shovel, the supporting mechanism is mounted at one side away from a shovel head of a traditional tool shovel, leverage supporting of the shovel head can be realized through a rotating rodwhich can be turned by 75 degrees, therefore, a heavier object can be pried in cooperation with the angle-adjustable shovel head, and the digging ability is enhanced; through the arrangement of the telescoping mechanism, a telescoping shaft is mounted in a shaft cylinder in a sliding mode and is fixed through a first screw, and therefore free sliding of the telescoping shaft in the shaft cylinderin use is avoided; the multifunctional tool shovel can be used by workers with different heights, and the angle of the shovel can be adjusted greatly; and when some special objects are dug, it can beguaranteed that the shovel head is perpendicular or parallel to the objects due to multi-angle rotation, so that the ability of digging the special objects is improved, and meanwhile leverage pryingcan be performed in cooperation with the supporting mechanism to dig some heavy objects.

The invention discloses a silencer pressing device. The silencer pressing device comprises a silencer and welding equipment, the silencer comprises an upper cavity, a lower cavity and a sealing ring,an upper cavity cover is arranged at the top of the upper cavity, a fixed end is arranged at the top of the upper cavity cover, the upper cavity cover is fixedly connected with the upper cavity, the fixed end is fixedly connected with the upper cavity cover, the sealing ring is arranged in the upper cavity cover and is clamped with the upper cavity cover, the upper cavity is clamped with the lowercavity; and the welding equipment comprises a shell, a supporting component and a pressure component. The problem that when the upper cavity and the lower cavity are extruded together through a hydraulic cylinder is solved, the position of the upper cavity cannot be fixed, the upper cavity and the lower cavity cannot be tightly attached, and the inclination is prone to occur; the position of thelower cavity cannot be fixed, and inclination occurs during the pressing process of the hydraulic cylinder; if the lower cavity is inclined, due to the fact that the hydraulic cylinder continuously presses down, the working table can be damaged, and the economic loss is caused.

The invention relates to a high-pressure water pump impeller molding and processing method which uses a high-pressure water pump impeller molding device. The high-pressure water pump impeller moldingdevice comprises a mounting bottom plate, a supporting column, a positioning mechanism and a cleaning mechanism. The high-pressure water pump impeller molding and processing method provided by the invention can solve the problems that in the high-pressure water pump accessory molding process, an upper box and a lower box which are used during casting molding need to be manually aligned, then a clamping tool is used for clamping and positioning the upper box and the lower box, during the period, stable and effective clamping and positioning operation is difficult to conduct due to the size difference of the casting box, residual casting liquid in the casting openings is difficult to completely remove manually due to the fact that the inclination angles and the diameters of casting openingsare not completely the same, the depth influence of the casting openings can influence cleaning operation to a certain extent, whether the inner walls of the casting openings are completely cleaned ornot is difficult to judge manually, the working efficiency of high-pressure water pump accessory molding operation is reduced, and the like.

The invention discloses a turning gear. The turning gear comprises a base, a rotating shaft, a gear, a limiting assembly, a shifting fork assembly and a positioning assembly; the rotating shaft is rotatably arranged on the base; the gear is arranged on the rotating shaft in a sliding and sleeving manner; the limiting assembly is connected with the rotating shaft and the gear so as to limit the gear to rotate relative to the rotating shaft; the shifting fork assembly is rotatably arranged on the base; one end of the shifting fork assembly is rotatably connected to the gear; through rotation of the shifting fork assembly, the gear has a first state in which the gear is meshed with a flywheel of an engine and a second state in which the gear is separated from the flywheel of the engine; and the positioning assembly is connected with the base and the shifting fork assembly, so that the gear is kept in the first state or the second state. The invention provides the turning gear which solves the technical problem that an existing turning gear is not high in working efficiency.

The invention discloses a welding flux position adjusting device assisting in working of a weldable testing instrument. The welding flux position adjusting device comprises a lifting device, a rectangular first flat plate is fixed to the lifting device, first sliding grooves are formed in the upper surface of the first flat plate in the long-axis direction, a first driving device and a second flat plate connected with the driving end of the first driving device are arranged on the upper surface of the first flat plate, and the second flat plate slides along the first sliding grooves. Second sliding grooves are formed in the upper surface of the second flat plate and are perpendicular to the first sliding grooves, a second driving device and a sliding block connected with the second driving device are arranged on the second flat plate, the sliding block slides along the second grooves, and a welding flux groove is formed in the surface of the sliding block. The welding flux position adjusting device assisting in working of the weldable testing instrument is provided for solving the problem that in the prior art, pins of a sample to be measured often cannot rightly face the center of a welding ball, and achieves the purposes of quickly adjusting welding flux and making the pins of the sample to be measured rightly face the center.

The invention relates to the technical field of joint rehabilitation instruments, in particular to a finger bending and stretching rehabilitation training device which comprises a glove, the glove is provided with a bending and stretching structure used for conducting bending and stretching rehabilitation training on fingers, the glove is connected with an elastic structure used for pulling and resetting, the bending and stretching structure is connected with an abutting structure used for abutting, and the finger bending and stretching rehabilitation training device is arranged on the glove. The bending and stretching structure is connected with an adjusting structure used for adjusting, the glove and the bending and stretching structure are provided with a storage structure used for storage, and the storage structure is connected with a limiting structure used for limiting. Rehabilitation of fingers can be promoted through the bending and stretching structure and the elastic structure, the bending and stretching structure can be conveniently adjusted through the adjusting structure so as to adapt to different crowds, the abutting structure plays a role in preventing free sliding, and the glove and the bending and stretching structure can be conveniently stored through the storage structure so as to be convenient to carry. And the limiting structure plays a role in limiting the storage structure, so that the storage structure is prevented from being scattered during falling.

The film supply device comprises a conveying mechanism and a film supply mechanism, the film supply mechanism is arranged above the conveying mechanism and used for supplying films to packaging cups on the conveying mechanism, the film supply mechanism comprises a mounting support and a mounting plate used for containing sealing films, and the mounting plate is slidably connected to the mounting support; the mounting plate is provided with a working position for supplying a film to the packaging cup and a film adding position for adding a sealing film to the mounting plate, and the mounting plate transversely slides relative to the mounting support so as to be switched between the working position and the film adding position. The film supply mechanism is arranged to be the mounting bracket and the mounting plate which are in sliding connection, when the sealing film on the mounting plate needs to be supplemented and added, the mounting plate is partially pulled out of the mounting bracket, and an operator only needs to stand on the side part of the film supply device in the whole sealing film adding process, so that the sealing film is completely added. And the body does not need to stretch into a narrow film supply device for adding, so that the operation is more comfortable, and the use experience of an operator is improved.