42results about How to "Avoid risk of loosening" patented technology

The invention relates to the technical field of battery hot melting connection, and discloses a high-efficiency hot melting riveting device for a lithium ion power battery pack. The device comprises an upper mold plate, wherein guide columns are arranged on the four sides of the bottom end of the upper mold plate, springs are arranged on the outer walls of the guide columns, the lower portions of the springs are fixed to a push plate fixing seat, the guide columns penetrate through the push plate fixing seat and extends to the lower portion, a lower mold plate is arranged below the middle of the upper mold plate, a graded preheating hot melting mechanism is arranged at the bottom end of the lower mold plate, and the two sides of the graded preheating hot melting mechanism extend to the bottom end of the push plate fixing seat. According to the device, temperature control, graded preheating, heating baking and active heat dissipation cooling are achieved through the arranged graded preheating hot melting mechanism, in this way, during hot melting riveting forming, the temperature of all hot melting points can be rapidly reduced so that plastic can be solidified, it is avoided that a plastic hot melting column in a semi-melting state is directly separated from a hot melting head, and the problems of deformation of the hot melting point, strain, insufficiency, no wrapping force and insufficient riveting strength are solved.

The invention relates to the technical field of underwater detection devices, and particularly discloses a riser reentry whipstock. The whipstock comprises an inclined plane body, a straightening unit, a sleeve, an anchoring unit and a lead-in head. The inclined plane body is fixed to a casing cutting opening, the inclined plane body is straightened through the straightening unit, and the inclinedplane body is provided with a longitudinal groove and a transverse groove to play a role in guiding in a riser and a drilling tool. The straightening unit is provided with a straightening cone plate,and performs the preliminary fixing while straightening the inclined plane body; the sleeve is provided with a hollow hole, and cementing sealing can be conducted after the whipstock is disengaged from a hand; the anchoring unit is arranged below the straightening unit and can fix the depth and direction of the inclined plane body; the leading-in head is located below the anchoring unit, and thebottom of the leading-in head is a conical head, so it is guaranteed that the whipstock smoothly descends into a casing cutting opening. The whipstock achieves the reutilization of an abandoned well groove, and effectively solves the problem that an inner-layer casing pipe is not centered; the longitudinal groove and the transverse groove provide guidance for the waterproof guide pipe and a drilling tool, and the risks of well hole finding and orientation deviation are avoided.

The invention discloses a screw locking method and screw locking equipment. The screw locking method comprises the following steps of making a bit of a screwdriver be coaxial with a screw in a loadingposition and making a front end of the bit protrude outside a surface where a front end of an air pipe of the screwdriver and a tail end surface of the screw are attached, wherein a length from the front end of the bit protruding outside a leaning surface is equivalent to a depth of a torque transmission groove in the tail end surface of the screw; forming a negative pressure in a through hole coaxial with the bit at the front end of the air pipe to adsorb the screw; and keeping the negative pressure at the through hole of the air pipe, wherein the bit rotates at a low speed. According to thescheme, before the screw is locked, the bit rotates at the low speed first. In the rotating process of the front end of the bit, the screw can enable the front end of the bit to be inserted into thetorque transmission groove to achieve a torque transmission connection under a suction effect, and the screw can be positioned by the bit when the screw is locked, so that a condition of inclination when the screw is in contact with a to-be-connected hole is avoided. Therefore, the locking quality is guaranteed effectively, the locking effectiveness is improved and the multi-point locking efficiency is improved.

A milling apparatus has a housing, a drive shaft extending along and rotatable about an axis in the housing and an axially compressible and radially expansible washer stack on the front end of the drive shaft. A tool is held by the on the shaft. A bolt projects radially in a slot through the shaft and is limitedly axially displaceable in the shaft. An actuator element shiftable axially in the passage projects axially forward out of the drive shaft and is fixed in the bolt. A clamping assembly axially compresses and radially expands the stack so as to lock the tool to the drive shaft. A spring assembly is braced axially forward against the housing and axially rearward against the bolt. A piston axially displaceable on the drive shaft in the housing bears axially forward on the bolt.

The invention provides a wheel hub bracket assembly for a torsion beam. The wheel hub bracket assembly comprises a wheel hub bracket and a longitudinal arm component; the wheel hub bracket comprises a mounting plate for fixing a wheel hub assembly, two front mounting legs and two rear mounting legs; a first mounting hole is formed in each of the front mounting legs; a second mounting hole is formed in each of the rear mounting legs; the longitudinal arm component comprises a longitudinal arm, a front sleeve and a rear sleeve; the longitudinal arm is provided with a first through hole group and a second through hole group; the front sleeve penetrates through and is fixedly connected with the first through hole group; the rear sleeve penetrates through and is fixedly connected with the second through hole group; the two ends of the front sleeve are fixedly connected with the first mounting holes; the two ends of the rear sleeve are fixedly connected with the second mounting holes. In the wheel hub bracket assembly provided by the invention, as an angle of the wheel hub bracket relative to the longitudinal arm can be adjusted, the process of performing section milling on a wheel hub bracket gasket is omitted, the production cost is reduced, the time is shortened, and the risk of bolt loosening can also be avoided.

The invention discloses a flip type orthodontic bracket with a variable arch wire slot. The flip type orthodontic bracket comprises a bracket main body and a flip, wherein the bracket main body is provided with the arch wire slot and a limiting mechanism; the limiting mechanism comprises a driving component and a push plate, and the push plate is arranged in the arch wire slot; and the pivot partof the flip is in transmission connection with the driving component, and the driving component is in transmission connection with the push plate. According to the orthodontic bracket, due to the limiting mechanism, a cover body is used for driving the limiting mechanism to adjust the arch wire accommodating space of the arch wire slot, and when the cover body is closed, the limiting mechanism canbe used for reducing the arch wire accommodating space in the arch wire slot and reducing the clearance of the arch wire groove, so that precise expression of torque of an arch wire is ensured, and the orthodontic effect of the orthodontic bracket is enhanced; and when the cover body is opened, the arch wire accommodating space is restored to the original size by the arch wire slot, so that an enough space is provided for in and out of the arch wire.

The invention provides a contact plate fixing structure which comprises a body and a contact plate. An inserting groove is formed in the body, and the inserting groove prevents the contact plate from continuing to advance in the inserting direction of the contact plate after the contact plate is inserted into a certain position. A boss is formed on the contact plate, the boss is provide with an arc edge, an elastic clamping groove allowing the boss to be inserted into is formed in the position, corresponding to the boss, of the body, when the contact plate is inserted into the certain position in the inserting groove and cannot continue to advance by being limited by the inserting groove, the elastic clamping groove and the boss form an inverted buckling and locking structure so that the contact plate cannot move in the direction opposite to the inserting direction of the contact plate, the contact plate can be located in the inserting direction of the contact plate and in the direction opposite to the inserting direction of the contact plate through the inverted buckling and locking structure and the inserting groove, the situation that the contact plate is crept and is loosened in the direction opposite to the inserting direction due to interference fit after being used for a long time is avoided, the inverted buckling and locking structure is formed and does not need new parts, and production cost cannot be increased.

The invention discloses a vehicle-mounted TFT (Thin Film Transistor) display screen backlight structure, which comprises a lower aluminum frame, an LED light bar arranged in the lower aluminum frame,an emission sheet arranged in the lower aluminum frame, a light guide plate arranged in the lower aluminum frame, a plurality of diaphragms arranged on the light guide plate, and a middle plastic frame arranged above the lower aluminum frame, wherein one end in two ends, which are positioned on the bottom of the lower aluminum frame and are near one long edge, is provided with a first round hole,and the other end is provided with a first waist-shaped hole; two ends, which are positioned on the lower surface of the light guide plate and are near one long edge, are independently correspondinglyprovided with a first poisoning column; and the light guide plate is independently correspondingly inserted into the first round hole and the first waist-shaped hole through the first positioning column so as to realize positioning. The vehicle-mounted TFT display screen backlight structure can realize positioning without filling other materials, and has the advantages of low cost, simple structure, reliability in positioning and high assembling efficiency.

The invention relates to the technical field of medical device design, in particular to a bionic surface hip joint prosthesis that is convenient for replacement, which comprises an acetabular cup prosthesis, a femoral head prosthesis, a pressure main nail and a tension auxiliary nail, and an acetabular cup prosthesis. The inner surface of the femoral head prosthesis is a hemispherical sliding friction fit with the outer surface of the femoral head prosthesis. The contact surface between the acetabular cup prosthesis and the femoral head prosthesis and the bone is a 3D printed bone trabecular structure. A head groove and a tail groove are formed in the femoral head prosthesis, and a spherical cover is installed at the head groove. The rear ends of the pressure main nail and the tension auxiliary nail are respectively provided with external threads, and the front ends of the pressure main nail and the tension auxiliary nail are respectively connected to the partitions respectively. The device provided by the invention has simple structure, convenient replacement, low cost, low friction coefficient and metal ion precipitation, good long-term bone ingrowth performance and can reconstruct the physiological fulcrum of the hip joint.

The invention provides a novel method for winding an antenna of a downhole instrument. The method for winding the antenna of the novel underground instrument has the following steps: S1. Material preparation: (1). Antenna housing body, antenna coil, skeleton and antenna fixed joint; S2. Process: (1) Drilling groove: drilling device through the antenna housing The main body of the antenna cover is drilled so that an antenna cover slot and a plurality of antenna slots are formed on the main body of the antenna cover, and the plurality of antenna slots are distributed in a circular array; (2) Drilling gaps: The skeleton is processed by equipment. , to open the toggle gap; (3) Fixed point: open an antenna fixed point on the skeleton. The new method for winding the antenna of the downhole instrument provided by the present invention can adapt to the harsh environment in the well, and is assembled on the main body of the antenna cover through high temperature heating, so that the firmness is higher, and the risk of loosening is avoided, thereby reducing the workload, Advantages of cost and probability of maintenance.

The invention discloses a clamshell-type orthodontic bracket with a variable archwire slot, which comprises a bracket main body and a flip cover. The bracket main body is provided with an archwire slot and a limiting mechanism. , the push plate is arranged in the archwire slot; the pivoting part of the flip cover is connected to the driving member by transmission, and the drive member is connected to the push plate by transmission. In the present invention, by setting a limit mechanism, the cover body drives the limit mechanism to adjust the arch wire accommodation space of the arch wire groove. When the cover is closed, the limit mechanism reduces the arch wire accommodation space in the arch wire groove and reduces the To ensure the precise expression of the torque of the arch wire, and enhance the correction effect of the orthodontic bracket of the present invention; when the cover is opened, the arch wire slot restores the original size of the arch wire accommodation space, so that there is enough space to put it in Or remove the arch wire.

The invention relates to the field of automobile luggage racks, in particular to an automobile luggage rack convenient for fixing articles, including a supporting mechanism, a transmission mechanism, a clamping mechanism, a limit mechanism and a fixing mechanism; While reducing the wind resistance of the car while driving, it improves the aesthetics and practicality. Through the setting of the transmission mechanism, it can provide power for the four clamping mechanisms at the same time, saving operating time and improving installation efficiency. Through the clamping mechanism Reasonable setting of the clamping part improves the structural strength of the clamping part and avoids the risk of loosening. The setting of the limit mechanism avoids the risk of theft, thereby improving its safety in use. The setting of the fixing mechanism facilitates the The items are firmly fixed, avoiding the items from shaking and being damaged during driving, and improving the driving safety.

The invention discloses a clamshell type orthodontic bracket, which comprises a bracket body and a flip cover. The bracket body is provided with an arch wire groove and a limit mechanism. Inside the arch wire slot; the inner side wall of the flip cover is driven against the driving member to drive and connect with the push plate. In the present invention, by setting a limit mechanism, the cover body drives the limit mechanism to adjust the arch wire accommodation space of the arch wire groove. When the cover is closed, the limit mechanism reduces the arch wire accommodation space in the arch wire groove and reduces the To ensure the accurate expression of the torque of the arch wire, and enhance the correction effect of the orthodontic bracket of the present invention; when the cover is opened, the arch wire slot restores the original size of the arch wire accommodation space, so that there is enough space to put it in Or remove the arch wire.

The invention relates to the technical field of supports and hangers of steam generators, and specifically relates to an integrated supporting assembly and a transverse supporting structure for a nuclear power steam generator. The integrated supporting assembly comprise a device connecting part, a middle connecting part and a wall body connecting part which are integrally connected. The device connecting part is a U-shaped hinge joint. Pin holes are formed in two symmetrical clamping arms of the U-shaped hinge joint correspondingly. The whole wall body connecting part is in a plate shape, a spherical hinge hole is formed in the wall body connecting part, and a spherical hinge is arranged in the spherical hinge hole. The two ends of the middle connecting part are connected with the closed end of the U-shaped hinge joint and one end of the wall body connecting part correspondingly. The central axes of the two pin holes are parallel to the central axis of the spherical hinge hole. Compared with the prior art, the supporting assembly is integrally manufactured and formed, and the influence of part damage caused by local stress concentration and the like of combined components under the huge load is avoided; a high-strength material is adopted, and enough strength is achieved; and the transverse supporting structure of the steam generator is formed by conducting connection in a hinged mode, factors, such as operation space, are fully considered, and debugging and overhauling are facilitated.

The invention relates to the field of automobile luggage racks, and particularly relates to an automobile luggage rack convenient for fixing articles. The luggage rack comprises a support mechanism, atransmission mechanism, clamping mechanisms, a limiting mechanism and a fixing mechanism. Through the arrangement of the supporting mechanism, a wind resistance of the automobile in a running processcan be reduced while an object containing space is increased, and attractiveness and practicability are improved; through the arrangement of the transmission mechanism, power can be provided for thefour clamping mechanisms at the same time, operation time is saved, and installation efficiency is improved; through the arrangement of the clamping mechanisms and the reasonable arrangement of the clamping part, the structural strength of the clamping part is improved; and a risk of loosening is avoided, the risk of theft is prevented through the arrangement of the limiting mechanism so that theuse safety is improved, objects can be firmly fixed through the arrangement of the fixing mechanism, shaking damage of the objects in the driving process is avoided, and the driving safety is improved.

The invention discloses a wall-mounted air conditioner indoor unit easy to disassemble and wash. The wall-mounted air conditioner indoor unit easy to disassemble and wash relates to the technical field of air conditioners, and can avoid the risk that a lower cover shell gets loose since the lower cover shell is not fastened in place. The wall-mounted air conditioner indoor unit easy to disassembleand wash comprises a shell, wherein the shell comprises a front panel and the lower cover shell; the front panel and the lower cover shell can be overturned to open; a detachable moving base is arranged in the shell; a fan is arranged on the moving base; a locking structure is arranged between the moving base and the lower cover shell, and comprises a rotary knob rotatably connected to an outer surface of the lower cover shell and a connecting lug arranged on the moving base; a clamping structure penetrating through the lower cover shell is arranged on a back surface of the rotary knob; the rotary knob can rotate between a locking position and an unlocking position; and a rotary plane of the rotary knob is perpendicular to a closing direction of the lower cover shell. The wall-mounted airconditioner indoor unit easy to disassemble and wash provided by the invention can be applied to an air conditioner easy to disassemble and wash.

The invention discloses a drop testing machine capable of simulating continuous drop, which belongs to the technical field of testing and comprises an object stage, a clamping mechanism, a driving mechanism, a support rod group and an eccentric wheel group, and the driving mechanism passes through the eccentric wheel group and the support rod group The transmission connection, the support rod group and the stage are offset. When the prototype to be tested falls from the clamping mechanism to the stage, the support rod group can drive the stage to make an instantaneous downward movement, realizing continuous drop testing. The clamping mechanism includes the second A clamping group, a second clamping group and a horizontal feed mechanism, the horizontal feed mechanism can drive the second clamping group to perform reciprocating feed movement, and cooperate with the first clamping group to clamp or loosen the prototype. The drop testing machine disclosed by the present invention can simulate the continuous drop, which can simulate the continuous drop state by using the clamping mechanism and the instantaneous drop stage, so that the test indicators are richer and more diverse, and it is more convenient to adjust the test height without manual multiple clamping. fast.

The invention discloses a drop test machine capable of simulating continuous drop. The invention belongs to the technical field of testing. The drop test machine comprises an objective table, a clamping mechanism, a driving mechanism, a supporting rod group and an eccentric wheel group. The driving mechanism is in transmission connection with the supporting rod group through the eccentric wheel group, and the supporting rod group abuts against the objective table. When a to-be-tested sample machine falls to the objective table from the clamping mechanism, the supporting rod group can drive theobjective table to do instantaneous descending motion to realize continuous drop test. The clamping mechanism comprises a first clamping group, a second clamping group and a horizontal feeding mechanism, and the horizontal feeding mechanism can drive the second clamping group to do reciprocating feeding motion to be matched with the first clamping group to clamp or loosen the to-be-tested samplemachine. According to the drop test machine capable of simulating continuous drop disclosed by the invention, the clamping mechanism is matched with the objective table capable of instantaneously dropping to simulate a continuous drop state, so that the test indexes are more abundant and diverse, the test height does not need to be adjusted by manually clamping for multiple times, and the operation is more convenient and quicker.

The invention discloses a cable joint connecting structure and a connecting method. The disadvantages that a cable joint and a cable conductor are inconvenient for connecting operation, the connectionreliability is bad, and the loose risk is existent are solved. The connecting structure comprises the joint body and the cable conductor; a large-diameter cylinder, a small-diameter cylinder and lugplates are arranged on the joint body; a soldering frame is arranged in the small-diameter cylinder, the soldering frame comprises a base, a plurality of support strips connected to the base; a plurality of axially arranged slots are correspondingly arranged on the inner wall of the small-diameter cylinder and the support strips one by one; the support strips are inserted into the slots in an adapting manner; a plurality of small-diameter soldering slots communicating with the slots are arranged on the outer wall of the small-diameter cylinder, and small-diameter soldering blocks are arrangedin the small-diameter soldering slots; a plurality of inward arched clamping shrapnel is uniformly arranged on the inner wall of the large-diameter cylinder, one end of each inward arched clamping shrapnel is tightly connected with the inner wall of the large-diameter cylinder, the other end movably fits with the inner wall of the large-diameter cylinder; the plurality of large-diameter solderingslots are arranged on an outer wall of the large-diameter cylinder, the large-diameter soldering blocks are arranged in the large-diameter soldering slots, and the cable conductors are inserted into the large-diameter cylinder and the small-diameter cylinder.