44results about How to "With preload" patented technology

The invention discloses a crane winding device with a steel wire rope straining mechanism. The crane winding device with the steel wire rope straining mechanism comprises a winding drum part, a motor and a speed reduction system, a one-way bearing is installed in a winding drum, the inner ring of the one-way bearing is matched with a transmission shaft, and the outer ring of the one-way bearing is matched with the winding drum; the steel wire rope straining mechanism is installed on one side of the winding drum and comprises a ratchet wheel, a pawl, a support and a limiting block, the ratchet wheel is connected to an end cap of the winding drum, ratchet wheel slots are formed in the periphery of the ratchet wheel at intervals, the pawl is installed on the support, embedded into the ratchet wheel slots under the action of a compressed spring and meshed with the ratchet wheel slots, the support is provided with an arc-shaped section which is provided with a groove, a brake cable is placed in the groove, one end of the brake cable is fixedly connected with the support, and the other end of the brake cable is connected with a manipulation handle; when the handle is pressed down, the support is made to rotate in the tension direction, the winding drum rotates along with the support to strain the steel wire rope; a torsional spring is installed between the support and a bearing seat, when the handle is loosened, the support returns to the original position under the action of the torsional spring, and the limiting block is installed on the bearing seat to make the pawl break away from the ratchet wheel slots. According to the crane winding device with the steel wire rope straining mechanism, the structure is compact, the design is reasonable, and straining of the steel wire rope is safe and reliable.

The invention provides a wind generating set and a transmission shaft system thereof. The transmission shaft system comprises a static part, a rotating shaft, a first bearing and a second bearing, and the rotating shaft is used for connecting a wind wheel of the wind generating set; the side, close to the wind wheel, of the first bearing is arranged between the static part and the rotating shaft, and the side, away from the wind wheel, of the second bearing is arranged between the static part and the rotating shaft; the rotating shaft is arranged on the outer side of the static part in a sleeving mode, the first bearing and the second bearing jointly support the rotating shaft, and the first bearing and the second bearing are both single-row tapered roller bearings. The two single-row tapered roller bearings are adopted to support the rotating shaft, the single-row tapered roller bearings can bear radial and axial combined loads mainly in the radial direction and have pre-tightening force, the bearing capacity of the transmission shaft system is improved, the overall rigidity of the shaft system is good, the structural deformation is small, the requirement of the bearings for the rigidity of the rotating shaft and the static part is lowered, the size of a rotor shaft and the static part is reduced, and the transmission shaft system cost is reduced.

Heat exchanger valve arrangement, especially for a radiator valve has a valve seat (24), valve element (27), spring element (31) and a pressure reaction apparatus (32), which serves to maintain a constant pressure across the valve, that are joined together by a single connection (33). The whole assembly then forms a single handheld unit that can be inserted into the valve housing.

The invention discloses a sewing device. The sewing device comprises a rack, a sewing machine supported on the rack and a tension mechanism positioned at the feeding side of the sewing machine and used for making a stitching edge of a material to be stitched have certain pre-tension force; the tension mechanism comprises a guide rail supported on the rack in a feeding direction and a clamping mechanism arranged on the guiding rail in a sliding mode and used for clamping one end of the stitching edge tightly. The sewing device can ensure the pre-tension force performed on the stitching edges during stitching, make the stitching edges always maintain flush and reduce the stitching cost.

The invention discloses a thread-off proof fastener for assembling a heat preservation and decoration integrated plate, a wall body structure of an exterior wall dried hanging heat preservation and decoration integrated plate using the thread-off proof fastener and a construction method thereof. The thread-off proof fastener comprises a connecting belt, a fixed part, a positioning part and a distance adjusting mechanism. The fixed part is fixed to one end of the connecting belt and used for being embedded into an exterior wall and fixed to the exterior wall. The positioning part is arranged atthe other end of the connecting belt and comprises an upper clamping part, a lower clamping part, an upper positioning plate and a lower positioning plate, wherein the upper clamping part and the lower clamping part extend up and down and are used for clamping into a corresponding heat preservation decoration integrated plate, the upper positioning plate and the lower positioning plate are horizontal, located inside at intervals, and used for attaching to the end face of the corresponding heat preservation decoration integrated plate, and the lower positioning plate remains horizontal with the bottom of the fixed part. The distance adjusting mechanism is provided with a locking structure, the adjusting end of the distance adjusting mechanism is arranged outside the positioning part, and the distance adjusting mechanism connects the positioning part and the connecting belt and can drive the positioning part to move towards the fixed part. The intensity of a wall body is greatly improved.

The invention provides a wiper shaft assembly structure and an automobile, relating to the technical field of automobiles, comprising a wiper spindle, a sleeve assembly, a wiper rocker arm, a coil spring and an electromagnet. A receiving cavity is provide inside that sleeve assembly, A main shaft of that wiper passes through the receive cavity, and extends along both ends of the sleeve assembly inthe longitudinal direction, A helical spring is positioned within that receive cavity, the end of the electromagnet near the spindle of the wiper, By detecting a collision between a vehicle and a pedestrian at the front of the vehicle, The automobile ECU sends a signal to the electromagnet, and the electromagnet generates an attraction force, the attraction force overcomes the spring force of thecoil spring, and the wiper spindle moves downward under the electromagnetic attraction force of the electromagnet, thereby alleviating the lack of lateral stiffness or poor durability of the supportin the prior art, and is prone to fatigue fracture phenomena; As well as the technical problems of small buffer space, non-repeatability and high replacement cost; It makes a lot of room for pedestrians to play a very good role in protecting.

The invention provides a refrigeration device, an adjustable bottom foot component and an assembly method of the two. The adjustable bottom foot component comprises a foot base, a screw rod and a fixed piece, wherein the foot base and the fixed piece are both provided with thread holes; the screw rod comprises a foot base section, a foot base positioning part and a fixed piece section connected in sequence; the foot base section is in threaded connection with the foot base; the fixed piece section is in threaded connection with the fixed piece; a fixed piece positioning part is arranged at one end, far from the foot base section, of the fixed piece section; the fixed piece positioning part is used for touching the fixed piece and forming pretightening force; and the foot base positioning part is used for touching the foot base and forming the pretightening force. The position relation between the foot base section and the foot base can be adjusted; the position relation between the fixed piece section and the fixed piece can be adjusted; the positioning can be realized; the factory delivery height is determined; and the difficult fall in the carrying process is realized.

The invention discloses a mechanical sealing device with a self-stirring function for a desulfurization circulating pump. The mechanical sealing device comprises an end cover, a rotating seat shaft sleeve and a rotating seat, wherein a dynamic sealing ring is mounted in the rotating seat, and a rotating ring anti-rotating pin is mounted on the rotating seat in an interference mode;, and a static ring anti-rotating pin mounting hole with the depth of larger than the effective length of the anti-rotating pin is formed in the end cover and corresponds to the static ring anti-rotating pin; a static sealing ring is mounted in the end cover, a push ring is arranged on the outer side of the end cover, the push ring is mounted on the end cover through an elastic pre-pressing connecting assembly, and the push ring has a movement trend in the axial direction under the action of the elastic pre-pressing connecting assembly, so that the static sealing ring is tightly attached to the dynamic sealing ring; and a plurality of stirring teeth are arranged on the outer circumference of the rotating seat. According to the technical scheme, the mechanical sealing device solves the problems of bubble accumulation and poor medium flowing between a rear protective plate and an impeller, heat generated by rotating friction of a mechanical seal can be taken away in time, and the service life of the mechanical seal is prolonged.

The invention provides a wiper shaft assembly structure and an automobile, relating to the technical field of automobiles, comprising a wiper spindle, a sleeve assembly, a wiper rocker arm, a coil spring and an electromagnet. A receiving cavity is provide inside that sleeve assembly, A main shaft of that wiper passes through the receive cavity, and extends along both ends of the sleeve assembly inthe longitudinal direction, A helical spring is positioned within that receive cavity, the end of the electromagnet near the spindle of the wiper, By detecting a collision between a vehicle and a pedestrian at the front of the vehicle, The automobile ECU sends a signal to the electromagnet, and the electromagnet generates an attraction force, the attraction force overcomes the spring force of thecoil spring, and the wiper spindle moves downward under the electromagnetic attraction force of the electromagnet, thereby alleviating the lack of lateral stiffness or poor durability of the supportin the prior art, and is prone to fatigue fracture phenomena; As well as the technical problems of small buffer space, non-repeatability and high replacement cost; It makes a lot of room for pedestrians to play a very good role in protecting.

The invention discloses a headset. The headset comprises a headset part, two ear shell parts and an elastic assembly, and the two ear shell parts are arranged at the two ends of the headset part; eachear shell part comprises a first shell and a second shell, the first shell is connected with the headset part, the second shell is located on the side, facing the other ear shell part, of the first shell and is rotationally connected with the first shell, and the rotating axis of the second shell extends in the arrangement direction of the two ear shell parts. The elastic assembly is installed onone of the first shell and the second shell, the other one of the first shell and the second shell is provided with an annular circumferential wall surrounding the rotating axis of the second shell,and the elastic assembly elastically abuts against the annular circumferential wall. The technical scheme of the invention can improve the ability of the headset to adapt to the use requirements of different users.

The invention discloses a multifunctional electric flashlight. The multifunctional electric flashlight integrates multiple functions and provides convenience for people to go out, travel and explore. A front electric flashlight is connected with a rear electric flashlight through a luminous pull wire, so that lighting is provided for the people who go out in groups, and the people can be connected together through a string and are prevented from being separated. The multifunctional electric flashlight is particularly useful for children, can serve as an emergency hammer and can be used for sounding an alarm and seeking help for explorers, so that the convenience is provided for the explorers.

The invention belongs to the technical field of LED lamps, and particularly relates to an LED ceiling lamp, which includes a suspension mechanism, a lamp panel, and a lampshade. Both the first fixing plate and the second fixing plate in the suspension mechanism of the LED lamp are provided with square fixed lengths. Hole; through the square fixed long hole, it can prevent the installation staff from misaligning the pre-drilled hole and the fixing hole on the LED lamp fixing frame due to some small errors during the drilling process. When fixing, in order to adapt to the The fixing holes cause damage to the fixing frame of the LED lamp, and at the same time, it also avoids that in the process of re-drilling, the new hole and the old hole overlap each other, resulting in the hole diameter being too large, so that it cannot be fixed normally; at the same time, the first fixing of the invention design The plate and the second fixing plate can swing mutually to adapt to holes at different positions through the swing.

The invention relates to a post-grouting method for a subway tunnel wall, which includes a grouting step and a sealing step. The grouting step is specifically: opening a blind hole on a segment, injecting planting glue into the blind hole, inserting a grouting pipe, and grouting The pipe is connected with a ball valve. After the planting glue is solidified, the ball valve is opened. Through the ball valve and the grouting pipe, a through hole is opened at the bottom of the blind hole, and grouting is injected into the ball valve. After the slurry enters the wall of the segment through the through hole; the grouting pipe Including the upper section tube and the lower section tube, the lower section tube, the upper section tube and the ball valve are screwed in sequence, the lower section tube is completely buried in the segment, and the outer wall of the upper section tube is provided with an isolation layer; the sealing step is as follows: the grouting step is completed and the After the set time, separate the upper tube and the isolation layer, take out the upper tube, insert the sealing rod into the through hole to achieve primary sealing; use the bulkhead to seal the lower tube to achieve secondary sealing; use filler to fill the through hole, Three closures are achieved. Compared with the prior art, the present invention has the advantages of simple operation, simple structure and good sealing performance.

The invention provides a refrigeration device, an adjustable bottom foot component and an assembly method of the two. The adjustable bottom foot component comprises a foot base, a screw rod and a fixed piece, wherein the foot base and the fixed piece are both provided with thread holes; the screw rod comprises a foot base section, a foot base positioning part and a fixed piece section connected in sequence; the foot base section is in threaded connection with the foot base; the fixed piece section is in threaded connection with the fixed piece; a fixed piece positioning part is arranged at one end, far from the foot base section, of the fixed piece section; the fixed piece positioning part is used for touching the fixed piece and forming pretightening force; and the foot base positioning part is used for touching the foot base and forming the pretightening force. The position relation between the foot base section and the foot base can be adjusted; the position relation between the fixed piece section and the fixed piece can be adjusted; the positioning can be realized; the factory delivery height is determined; and the difficult fall in the carrying process is realized.

The invention discloses an auto-separating combination die of a shock-absorbing rubber support. The combination die comprises a bottom die plate and a die body, wherein a positioning groove matched with a lower base plate of the shock-absorbing rubber support is arranged in the bottom die plate; the die body comprises a plurality of first die plates and a plurality of second die plates of wedge structures; in the state of die combining, notches matched with the second die plates are formed between adjacent first die plates; and the first die plates cooperate with the second die plates to form a die cavity matched with a rubber body of the shock-absorbing rubber support. According to the auto-separating combination die of the shock-absorbing rubber support, the first die plates cooperate with the second die plates to form the die cavity to facilitate the demolding and the discharging after vulcanization shaping; and the second die plates are designed to be of wedge structures and are matched with the notches between adjacent first die plates to play the role of pre-locking during die combining, so that reliable locking can be realized.

The invention relates to a pre-tightening type clamping device applied to the field of an underwater robot. The pre-tightening type clamping device comprises a base, a supporting part, a sliding rod, a support, clamp fingers, a sliding block guide rod mechanism, driving connecting rods and parallel rod mechanisms. The supporting part and the sliding block guide rod mechanism are fixedly mounted on the base, the sliding rod is arranged in the supporting part and driven by the sliding block guide rod mechanism to ascend and descend, the support is fixedly mounted on the supporting part, the sliding rod penetrates the rear face of the support to be coaxially hinged to the two driving connecting rods, and the two driving connecting rods are hinged to the parallel rod mechanisms arranged on the two sides of the sliding rod; and the two parallel rod mechanisms are hinged to the support and driven by the driving connecting rods to be opened or closed, and the clamp fingers used for clamping structural parts are arranged on the parallel rod mechanisms correspondingly. The sliding block guide rod mechanism and the parallel rod mechanisms are used for driving the device to carry out clamping and releasing, certain pre-tightening force is achieved, and the aim that the structural parts can be clamped and released within the small space range can be achieved.

The invention discloses a thread-off proof fastener for assembling a heat preservation and decoration integrated plate, a wall body structure of an exterior wall dried hanging heat preservation and decoration integrated plate using the thread-off proof fastener and a construction method thereof. The thread-off proof fastener comprises a connecting belt, a fixed part, a positioning part and a distance adjusting mechanism. The fixed part is fixed to one end of the connecting belt and used for being embedded into an exterior wall and fixed to the exterior wall. The positioning part is arranged atthe other end of the connecting belt and comprises an upper clamping part, a lower clamping part, an upper positioning plate and a lower positioning plate, wherein the upper clamping part and the lower clamping part extend up and down and are used for clamping into a corresponding heat preservation decoration integrated plate, the upper positioning plate and the lower positioning plate are horizontal, located inside at intervals, and used for attaching to the end face of the corresponding heat preservation decoration integrated plate, and the lower positioning plate remains horizontal with the bottom of the fixed part. The distance adjusting mechanism is provided with a locking structure, the adjusting end of the distance adjusting mechanism is arranged outside the positioning part, and the distance adjusting mechanism connects the positioning part and the connecting belt and can drive the positioning part to move towards the fixed part. The intensity of a wall body is greatly improved.

The invention discloses a method for producing a glass fiber reinforced plastic anchor pole, especially a method for producing a highly torsion-resistant, anti-shearing prestressing glass fiber reinforced plastic anchor pole, comprising the following steps of: mixing unsaturated polyester resin, nanometer mullite, aluminium hydroxide, polyurethane, zine stearate, white carbon black, methylethyl ketone peroxide, TBPB and a mould release agent according to a mass ratio in a resin solution groove with stirring to produce a resin solution, followed by vacuum-pumping and bubble-removing; towing glass fibres from a filament rack, twisting the glass fibres on a twisting support to form a twist of 10-30 degrees by rotating and towing the twisted glass fibres into the resin solution groove for impregnation; towing the twisted and impregnated glass fibres into a cone-shaped sleeve for folding and bundle-forming as well as preforming; finally continuously towing the folded bundles of glass fibres into a hot pressing die, followed by molding at the temperature of 160-180 DEG C. The method provided by the invention is simple, and the anchor pole produced by the invention has high torsion-resistant and anti-shearing performance as well as low cost.

The invention discloses a reversal valve of a steering hydraulic system of a bulldozer. The reversal valve is characterized in that a scarifier operating valve core mounting hole, a dozer blade operating valve core mounting hole and corresponding oil holes are formed in a valve body; a scarifier operating valve core is arranged in the scarifier operating valve core mounting hole in a penetrating manner; a dozer blade operating valve core is arranged in the dozer blade operating valve core mounting hole in a penetrating manner; the left end of the scarifier operating valve core is positioned through a second positioning seat; the second positioning seat is internally provided with a spring sliding seat; the spring sliding seat is internally provided with a second spring; a stop block is arranged at the left end of the second positioning seat; the left end of the dozer blade operating valve core is positioned through a first positioning seat; the first positioning seat is internally provided with a spring and a positioning sleeve; the positioning sleeve is arranged at the left end of the spring; a pressing cover is arranged below the positioning sleeve, and is internally provided with a pressing seat; and the pressing seat is internally provided with a first spring and a steel ball. The reversal valve has a servo function, and is simple and flexible to operate, and compact in structure.

The invention provides a pipe pile welding vehicle with fast assembly and disassembly with a locking track, comprising: a quick locking track, a welding trolley, a control system and an operating handle; the welding trolley includes a clamping mechanism, and the welding trolley passes through the The clamping mechanism is clamped on the fast locking track; the control system is installed on the welding trolley and connected with the welding trolley; the operating handle is connected with the control system for controlling The control system controls the welding carriage. The pipe pile welding vehicle with fast assembly and disassembly with locking track of the present invention clamps the welding trolley on the fast locking track through the clamping mechanism, and can ensure the stability in the welding process without manual locking.