586 results about "Set screw" patented technology

An expandable interbody with a modular endplate has an outer column, an inner column threadedly coupled and translatable relative to the outer column along the longitudinal axis, and an expansion ring to adjust a body length of the expandable interbody. The expansion ring has a plurality of teeth, and the outer column has at least one arm for engaging a tooth of the plurality of teeth to lock the expansion ring. The inner column and / or outer column can include a connector for connection to a modular endplate that has a substantially hollow core. The modular endplate includes a plate with a set screw entrapped therein. The modular endplate has an aperture to receive the connector of the inner and / or outer column.

The invention discloses a fine gap-adjustable tilting pad bearing and a control method, and belongs to the technical field of bearings, and the fine gap-adjustable tilting pad bearing comprises a bearing body, pads, pre-tightening screws, set screws, a cover plate, a displacement amplification structure, pre-tightening bolts, elastic gaskets and piezoelectric ceramic stacks. A plurality of tilting pads are arranged on the inner arc surface of the bearing body and are matched with the bearing body through a spherical support; four radial grooves are formed in the outer arc face in the circumferential direction and are opposite to the centers of the four tile blocks respectively. A notch of the radial groove is connected with a cover plate, is internally provided with a piezoelectric ceramic displacement amplification mechanism and is connected with the spherical support through a positioning pin; a piezoelectric ceramic stack is arranged between a left boss and a right boss of the mechanism and is pre-tightened by a pre-tightening bolt and an elastic gasket. According to the invention, the inverse piezoelectric effect of piezoelectric ceramics is utilized, a vibration and non-linear suppression method is provided, an advanced control algorithm is matched, the piezoelectric ceramics stack is electrified and contracted, a displacement amplification effect is generated through a displacement amplification mechanism, the tile gap is finely adjusted, and the high-performance requirement of modern rotating machinery is met.

Expandable spinal implants, systems and methods are disclosed. An expandable spinal implant may include a first endplate, a second endplate, and a moving mechanism that is operably coupled to the first and second endplates. The moving mechanism may include a wedge, a first sliding frame and a second sliding frame disposed on opposite sides of the wedge, a screw guide housing a rotatable first set screw and a rotatable second set screw opposite the first set screw. The first set screw may be operably coupled to the second sliding frame and the second set screw may be operably coupled to the wedge. The moving mechanism may operably adjust a spacing between the first and second endplates upon simultaneous rotation of the first and second set screws and operably adjust an angle of inclination between the first and second endplates upon translating the first set screw or second set screw.

Disclosed are reducer instrument locking mechanisms. They can be located near a center pivot joint of the reducer, thereby eliminating a ratchet at the reducer proximal end. The locking mechanisms can include a pawl or latch that travels with one handle from an open position to a closed position. The pawl can fall into a groove formed in an opposing handle such that handles of the reducer can be locked relative to one another, at least with regard to movement of the handles away from one another. When falling into the groove, the pawl can create an auditory and / or tactile indication that a sufficient amount of rod reduction has been achieved to allow for set screw insertion. After set screw insertion, the reducer locking mechanisms can be released to clear it of the groove and allow the reducer to return to its open position.

An adjustable support arm capable of providing users with a wide range of height, depth, tilt, and swivel options. The adjustable support arm may comprise an arm assembly releasably mounted to a base assembly. In further embodiments, the adjustable support arm may also comprise an articulating joint connected to the arm assembly, and an accessory bracket assembly connected to the articulating joint. A quick-release joint comprising a spring-loaded pivot latch may be utilized to releasably connect the arm assembly to the base assembly. To dampen side-to-side movement of the arm assembly, the adjustable support arm may also comprise a friction cartridge assembly comprising a taper-lock bushing and one or more set screws. A ring-shaped, adjustable panning insert can be coupled to the arm assembly to restrict the range of side-to-side motion of the support arm. The adjustable arm can further comprise a quick-release accessory fastening mechanism for easy removal and attachment of a mounted object (e.g., an electronic display, keyboard, or other item) to the support arm.

Implantable devices and assemblies that provide a friction fit between a receiver and a fastener, such as a bone screw. A frictional force is applied between the screw head and both a retention ring and a pressure insert, maintaining and stabilizing the orientation of the receiver relative to the screw head before being fixed by a set screw. This mechanism prevents drooping or slipping of the receiver out of alignment when implanted. Additionally, the devices allow for modular assembly before or during spinal fixation, enabling bottom-side loading of the screw head into the receiver. Various screws with different characteristics can be coupled to the receiver body before or after implantation. The frictional force may be facilitated by one or more ridges on the receiver body that engage the pressure insert, which is resiliently urged against the screw head, providing a spring-like compression force.

Disclosed in the present invention is a pull-in rotatable elastic casing centralizer, comprising an upper end ring. A plurality of working rib plates are connected to the bottom of the upper end ring. The sides of the plurality of working rib plates away from the upper end ring are jointly connected to a lower end ring. A stop ring is sleeved on the outer wall of the lower end ring. Also disclosed in the present invention is a centralizing method based on a pull-in rotatable elastic casing centralizer. Before entering a wellbore, the centralizer is sleeved on the outer side of a casing, the lower end ring is mounted in a direction toward a wellhead, set screws distributed on the outer side of the stop ring are tightened, and the entire centralizer is fixed to the casing, thereby completing centralization. After the mounting is completed, the stop ring of the centralizer and the casing are fixed relative to each other, and the entire centralizer is pulled into the wellbore along with the casing, so that the resistance during entering is relatively small, and no destructive impact is caused to rib plates of the centralizer due to difficulty in entering. In addition, even if the centralizer encounters resistance in the wellbore, the pull-in design will not cause destructive compression of the rib plates of the centralizer, allowing the centralizer to more easily pass.

The utility model discloses a supporting tool convenient for preparing a surface coating of a ball core piece, which belongs to the field of alloy coating preparation and is characterized in that a supporting sleeve is sleeved on a working connecting rod, an adjusting screw hole and a positioning screw hole are arranged on the supporting sleeve, and a positioning screw is used for connecting the supporting sleeve with the working connecting rod through the positioning screw hole; the adjusting screw is detachably connected into the adjusting screw hole through a thread; the operation ball core piece is arranged on the supporting sleeve in a sleeving mode, and the inner surface of the operation ball core piece abuts against the top end of the adjusting screw. According to the utility model, two line supports are matched with one central point support and conform to the equilateral triangle design principle, so that the gravity center of the tool and the gravity center of a working piece are ingeniously overlapped together, and the eccentricity ratio is reduced, thereby reducing the coating defects caused by eccentricity and jumping in the coating preparation process and improving the coating quality of products.

The welded steel pipe chamfering machine table for the crawler crane tower comprises an L-shaped frame, an air cylinder is fixedly connected to the end wall of the top of the frame, and a fixing base is in transmission connection to the lower end wall of the air cylinder. The welded steel pipe chamfering machine table for the crawler crane tower has the beneficial effects that during chamfering, the liquid base is assembled and connected to the side wall of the fixing base through the positioning screws, the liquid base is convenient to disassemble and assemble, a liquid conveying pipeline is connected to a liquid pipe opening of the liquid base, liquid is poured into an inner cavity of the liquid base and then sprayed out through a spraying hole in the end wall of the right side of a penetrating opening of the liquid base, and therefore chamfering is achieved. The end wall of the right side of the penetrating opening is inclined, spraying holes formed in the end wall of the right side of the penetrating opening are inclined and annularly distributed in a round hole in the right side of the penetrating opening, the spraying holes spray liquid, the liquid is poured to the chamfering tool bit from the chamfering tool bit by 360 degrees, and the chamfering tool bit is protected; the chamfering tool bit is protected in all directions without dead angles, and the cooling effect of the chamfering tool bit is improved.

The utility model discloses a device for processing high interchangeability support type parts, which comprises a rotary body, an adjustable positioning groove, a positioning screw, a pressing plate and a clamping bolt, one end of the rotary body is connected with a rotary dividing head of processing equipment, and the other end of the rotary body is used for clamping and positioning the parts; the positioning screw is connected with the rotary body through the adjustable positioning groove and is used for aligning and locking the part; the clamping bolts penetrate through the pressing plates to be connected with the bolt holes in the two sides of the rotary body and used for pressing the support parts. According to the device disclosed by the utility model, a part can be quickly positioned and clamped on the device, so that a conventional three-axis machining method is changed along with the rotation characteristic of the whole device, and the part can be operated and machined on equipment or a dividing head with rotation machining capability. By means of the device, accumulative errors of high-interchangeability support parts in the machining process can be reduced, the size precision, consistency and interchangeability of batch parts are improved, the technological process is shortened, and the production efficiency is improved.

This invention relates to a tightening and reinforcing assembly and installation method for existing curtain wall decorative strips. The assembly includes a reinforcing plate, a set screw, and a self-locking nut. The set screw is connected to the keel; the set screw is fixedly connected to the reinforcing plate; the self-locking nut is fixedly connected to the set screw; both ends of the reinforcing plate abut against the profile wall of the keel; and the reinforcing plate abuts against two opposing existing curtain wall decorative strips. During installation, the reinforcing plate is installed between the gaps of the two opposing existing curtain wall decorative strips. After the set screw is rotated and tightened against the keel wall, the reinforcing plate presses against the existing curtain wall decorative strip. The self-locking nut is then installed for reinforcement. Compared with the prior art, the tightening and reinforcing assembly of this invention does not require disassembly of the original decorative strips, does not disturb the existing curtain wall, and can effectively reinforce the existing curtain wall decorative strips. Furthermore, during later maintenance, only the set screw and self-locking nut need to be tightened, making the operation simple and maintenance convenient.

The utility model relates to a portable circular die replacing structure for a handheld die head threading machine. The split type die is characterized in that the split type die comprises a circular die, a lining set screw, a lining, a split type die head and a die head set screw, a lining positioning hole is formed in the wall face of the circular die, a lining positioning through hole and a die head positioning hole are formed in the wall face of the lining, the circular die is sleeved with the lining, and the die head set screw is arranged on the lining. The bushing set screws are fixed in the bushing positioning through holes and the bushing positioning holes; the split type threading die head comprises a connecting sleeve and a connecting base used for being fixed to the handheld electric threading machine, the connecting sleeve is fixed to the connecting base, a threading die head positioning through hole matched with the threading die head positioning hole is formed in the wall face of the connecting sleeve, the lining is arranged in the connecting sleeve of the split type threading die head in a sleeved mode, and the lining is arranged on the connecting base. And the threading die head set screw is fixed in the threading die head positioning through hole and the threading die head positioning hole. The device is reasonable in structural design and convenient to disassemble and assemble.

This invention provides a conversion lifting section for replacing rotary steerable tools, comprising: an outer tube body, a lifting rod, an elastic buffer mechanism, a universal joint mechanism, and an instrument connecting rod. The upper end of the lifting rod is movably disposed within the inner cavity of the outer tube body via the elastic buffer mechanism, and the lower end of the lifting rod is connected to the upper end of the instrument connecting rod via the universal joint mechanism. An upper limit stop is provided in the inner cavity, and a positioning screw is provided on the circumferential sidewall of the outer tube body. When the elastic buffer mechanism is located between the upper limit stop and the positioning screw, the instrument connecting rod retracts back into the outer tube body. This invention increases the movement range of the lower instrument string of the connecting telescopic rod within the drill bit by 300mm, saving time and cost for RSS rotary steerable integrated drill bits.

A spinal fixation system for use in securing a spinal rod to a vertebra using a lockable bone screw connector. The connector is configured to be movably connected to the head of a bone screw, and a spinal rod can then be used to physically connect a first vertebra to a second vertebra. The spinal fixation system includes a tool grasping the connector by a locking and / or unlocking instrument that can allow the connector to lock to the bone, screw by moving a collet, while the connector can still move along the spinal rod until locked into place by a set screw. The connector can be selectively unlocked from the bone screw for adjustment or removal.

This utility model discloses a rotary damping dial, relating to the field of mechanical transmission and control. It includes an outer wheel, an inner wheel, and a damping mechanism. At least one damping mechanism is provided between the outer and inner wheels. The damping mechanism includes a set screw threaded onto the outer wheel, a spring at the tail end of the set screw, and a damping pin. By tightening or loosening the set screw, the spring is compressed or released, thereby adjusting the resistance of the damping pin on the inner wheel. The damping mechanism of this utility model consists of a set screw, a spring, and a damping pin. In use, by tightening or loosening the set screw, the spring force is changed, thereby adjusting the resistance of the damping pin on the inner wheel. The resistance between the damping pin and the inner wheel can be adjusted according to the usage scenario, allowing the same specification of damping dial to be used in different scenarios, thus improving the flexibility and practicality of the damping dial.

The utility model discloses a forging imitating type sand core hub mould, which comprises a lower mould, an upper mould, a sand core piece and a base, the base is connected with the lower mould through a positioning screw, a plurality of sand core placing grooves are distributed on the lower mould, and the same mould core piece is arranged in each sand core placing groove. And the sand core piece, the lower mold and the upper mold form a complete sand core hub casting space. According to the utility model, the structural design is reasonable, the sand core piece matched with the corresponding structure of the hub is arranged and distributed, and the sand core placing groove used for installing the sand core piece is arranged in the middle of the upper die, so that the peculiar space sense of a forged wheel is achieved, one-time casting molding and subsequent simple processing can be completed, the processing cost of the hub is greatly reduced, and the product benefit is improved.

The utility model discloses a wastewater AO treatment device, which relates to the technical field of wastewater treatment and comprises a treatment tank, a top cover is arranged at the top of the treatment tank, a water inlet pipe is arranged on the side surface of the treatment tank, a blow-off pipe is arranged at the bottom of the treatment tank, and a mixing component is arranged in the middle of the top of the top cover and comprises a driving motor. A rotating rod is arranged at the bottom of the driving motor, a mounting ring and a positioning bolt are arranged outside the rotating rod, and a stirring paddle and a through groove are arranged on the side face of the mounting ring. According to the device disclosed by the utility model, wastewater and oxygen are fully mixed through the arranged mixing assembly, and the arranged driving motor drives the rotating rod and the mounting ring to rotate, so that the wastewater and the oxygen are fully mixed in the rotating process of the stirring paddle, and the wastewater decomposition efficiency is improved; and a hydraulic rod and an ejector plate are ejected through a hydraulic cylinder, so that the ejector plate drives the top cover and the mixing assembly to be separated from the treatment tank.

The invention belongs to the field of aero-engine tests, and particularly relates to an aero-engine turbine rear baffle optical scanning measurement tool and a use method. A rotary table fixing plate is arranged on an optical scanning measurement platform; the supporting seat comprises an upper supporting seat and a lower supporting seat, and the upper supporting seat or the lower supporting seat is fixedly mounted on the rotary table fixing plate; the middle supporting plate is circular and is located between the upper supporting seat and the lower supporting seat, and the upper supporting seat, the middle supporting plate and the lower supporting seat are fixedly connected through bolts; a turbine rear baffle to be tested sleeves the outer side of the middle support plate; the multiple clamping rods are evenly arranged in the circumferential direction of the middle supporting plate, each clamping rod comprises a positioning part, an upper clamping part and a lower clamping part, the positioning parts are fixedly connected with the middle supporting plate, the upper clamping parts are fixedly connected with the upper surface of the turbine rear baffle to be detected through upper set screws, and the lower clamping parts are fixedly connected with the lower surface of the turbine rear baffle to be detected through lower set screws. And the lower clamping part is fixedly connected with the lower surface of the turbine rear baffle to be tested through a lower set screw. According to the invention, measurement errors can be reduced, and the measurement efficiency can be improved.

This utility model relates to the technical field of rope force distribution devices, specifically a detachable multi-hole force distribution plate for ropes, including a first multi-hole force distribution plate, a second multi-hole force distribution plate, and a long rod. The long rod passes through the mounting holes of the two force distribution plates, and a central pressure spring, a central rod, and a knob are sequentially fitted onto one end of the long rod. The knob is threadedly connected to the central rod, and the two ends of the central pressure spring abut against the second multi-hole force distribution plate and the fitted central rod, respectively. One end of the long rod is connected to the second multi-hole force distribution plate via a stud pin and to the central rod via a cotter pin. The first multi-hole force distribution plate has at least three first mounting brackets, and the second multi-hole force distribution plate has at least four second mounting brackets. The first mounting brackets are located in the gaps between the second mounting brackets, and the mounting holes are located in the mounting brackets. The knob is connected to the central rod via a set screw, and a compression spring is fitted onto the set screw. Both force distribution plates are five-hole force distribution plates, enabling detachable assembly, balanced force distribution, and stable connection. They are suitable for multi-strand ropes, improving applicability and safety.

The invention belongs to the technical field of process assembly, and particularly discloses a special-shaped part deep hole turning device which comprises a connecting flange plate used for being connected with a numerical control lathe. The center positioning assembly is fixedly arranged on the connecting flange plate and used for conducting center positioning on the special-shaped part; and the fixing piece is fixedly arranged on the center positioning assembly in a telescopic mode and used for fixing the special-shaped part. According to the device, in the machining process, the coaxiality of the part and the rotating center of the lathe spindle is ensured by strictly controlling the relative positions of the part and the left limiting block and the lower limiting block, so that the coaxial precision of a deep hole is ensured, positioning is conducted through the other two positioning screws in the vertical direction, the whole process is convenient and rapid, the clamping efficiency is high, and the machining precision is high. And finally, batch machining of the deep holes in the special-shaped parts on the numerical control lathe can be achieved.

The utility model discloses a convenient-to-install electric heating towel rack which comprises a fixing box which is installed on a building wall through a positioning assembly. The positioning assembly comprises an upper clamping piece, a lower clamping piece and a positioning screw, the upper clamping piece and the lower clamping piece are both fixed to the building wall, and the top end of the upper clamping piece and the bottom end of the lower clamping piece are both arranged in an inclined mode towards the side away from the building wall. The side, close to the building wall, of the fixing box is of an opening structure and covers the outer sides of the upper clamping piece and the lower clamping piece, the inner wall of the top end of the fixing box is fixedly connected with a limiting plate, a reserved gap is formed between the limiting plate and the end wall of the side, away from the building wall, of the fixing box, and a positioning screw hole is formed in the bottom end of the fixing box. When the fixing box is connected with the positioning assembly, the inclined portion of the top end of the upper clamping piece stretches into the reserved gap and is connected with the top end of the fixing box in a clamped mode, the positioning screw is in threaded connection with the positioning screw hole, and the top end of the positioning screw stretches into the fixing box and then abuts against the inclined portion of the bottom end of the lower clamping piece.

Invention relates to polyaxial spinal screws for correcting and stabilizing a spinal cord by open and minimally invasive technique. The polyaxial spinal screw comprises a screw shaft (10), a coupling (20), a sleeve (30) and a set screw (50). The coupling (20) has a proximal end (202) and a distal end (203). The coupling (20) comprises a spherical cut (21) sized to receive the screw shaft (10). The coupling (20) further comprises two slots (26) for receiving a stabilizing rod (40). The coupling (20) comprises an inner thread (24) where the set screw (50) is threaded. The sleeve (30) has a proximal end (302) closer to the proximal end (202) of the coupling (20) and a distal end (303). The sleeve (30) comprises at least two slots (32) for receiving a stabilizing rod (40) and at least two recesses (33) for fixation of the polyaxial spinal screw by auxiliary tools.

The utility model relates to the technical field of guardrails, in particular to an exhibition hall article protection device. Comprising a pipe body, a hollow base plate is arranged below the pipe body, a suction cup connected with the pipe body in a sliding mode is arranged in the base plate, a supporting spring is arranged at the connecting position of the suction cup and the pipe body, notches are formed in the two sides of the upper portion of the pipe body, and a positioning screw is arranged on the outer wall of the upper portion of the pipe body; the vertical rod is connected with the pipe body in a sleeved mode and fixed through a positioning screw, and clamping grooves are symmetrically formed in the vertical rod; according to the utility model, the suction cups are adsorbed on the ground, so that the overall firmness can be enhanced, a plurality of interception pieces can be arranged along the clamping grooves, the protection effect is greatly improved, and meanwhile, the interception height can be increased according to requirements, so that people are prevented from crossing.

Implantable devices and assemblies that provide a friction fit between a receiver and a fastener, such as a bone screw. A frictional force is applied between the screw head and both a retention ring and a pressure insert, maintaining and stabilizing the orientation of the receiver relative to the screw head before being fixed by a set screw. This mechanism prevents drooping or slipping of the receiver out of alignment when implanted. Additionally, the devices allow for modular assembly before or during spinal fixation, enabling bottom-side loading of the screw head into the receiver. Various screws with different characteristics can be coupled to the receiver body before or after implantation. The frictional force may be facilitated by one or more ridges on the receiver body that engage the pressure insert, which is resiliently urged against the screw head, providing a spring-like compression force.

The utility model relates to the field of solar energy, concretely relates to a power assembly suitable for solar energy device and solar energy device. First aspect, propose a kind of power assembly suitable for solar energy device, including central shaft, transmission nut, transmission sleeve, screw nut and lead screw. Central shaft inside is equipped with the hollow structure for setting screw and screw nut. Transmission nut is sleeved in central shaft, transmission sleeve is sleeved in transmission nut, and spiral transmission pair is arranged between transmission sleeve and transmission nut, screw nut is transmission cooperation with lead screw, and screw nut is connected with transmission nut. Screw nut includes first section, second section and third section in turn along its central axis, the inner periphery of first section is equipped with the thread matched with lead screw, the inner periphery of third section is also equipped with the thread matched with lead screw, and the inner periphery of second section is not equipped with thread. Second aspect, according to the power assembly described above proposes a kind of solar energy device.

The utility model discloses a wall thickness gauge for measuring gradient thickness, and relates to the technical field of part processing and measuring. The top end of the base is provided with a supporting plate in a threaded mode, the top end of the supporting plate is provided with a meter clamp, the top end of the meter clamp is provided with a dial indicator, the outer side of the dial indicator is provided with a measuring rod, the supporting plate is provided with a standard block in a threaded mode, a set screw is inserted in the meter clamp in a threaded mode, and a first screw is inserted in the base and is inserted in the supporting plate in a threaded mode; two nuts are installed on the outer side of the standard block, and a second screw is inserted into the top end of the meter clamp. According to the utility model, the base, the supporting plate, the standard block and other structures are matched with each other, so that the measuring surface of the standard block can be ensured to be a horizontal surface which is the same as a measuring reference surface designed by a part, and the measuring reference is ensured to be accurate; the dial indicator displays a wall thickness measurement value, and the reading of a detection result is more visual.

The utility model relates to vacuum freeze drying machine technical field, concretely is a kind of box type vacuum freeze drying machine, it includes: material cover, body, material cover is connected and is arranged on body, and material cover end wall is equipped with mounting jack, and mounting jack is inserted and is connected and is equipped with thermometer in, and the temperature meter is fixedly sleeved and is equipped with mounting convex ring on its peripheral wall;The thermometer is set on material cover by connecting component;By inserting sealing washer into the inner wall of outer thread pipe and being connected with material cover, inserting thermometer into mounting jack until mounting convex ring is inserted into outer thread pipe and extrudes sealing washer, moves L-shaped plate and makes it be connected into the card slot, positioning plate and the positioning groove on mounting convex ring are connected fixed mounting convex ring position to ensure that mounting convex ring extrudes sealing washer, sets screw nipple threaded connection on outer thread pipe and limits L-shaped plate, realizes that thermometer is fixedly installed on material cover, simple operation, it is convenient for thermometer to be damaged after quick replacement, avoid affecting the normal use of device.

The utility model relates to the technical field of equipment installation, and discloses a steam generator temporary supporting device which comprises a hydraulic system, a supporting table and a limiting part, and the supporting table comprises a hoisting part, a horizontal adjusting part, a supporting seat and a vertical adjusting part. By arranging the vertical adjusting part, the problems that in the prior art, a hydraulic cylinder is subjected to shear stress perpendicular to the axial direction of the hydraulic cylinder during working, and the hydraulic cylinder responsible for adjusting the longitudinal position of the steam generator is damaged due to excessive abrasion for a long time are solved; therefore, the overall operation stability of the supporting table is improved, and later maintenance work is facilitated; by arranging the lead screw, the adjusting rod and the sliding block, due to the fact that the lead screw rotates to drive the sliding block to move to achieve lifting of the steam generator, and due to the fact that threaded connection of the lead screw and the sliding block has a self-locking effect, it can be further guaranteed that when the power part loses efficacy, the steam generator can automatically keep the existing position, and falling is prevented.

The utility model belongs to the technical field of tools, and particularly discloses a dual-purpose tool suitable for disassembling and assembling a motor, which comprises a base welding piece, a clamping arm, a clamping jaw, a cross rod and a handle threaded rod, four supporting columns are pre-buried and welded on the base welding part, and comprise two cylindrical supporting columns and two rectangular supporting columns; wherein a cross rod is installed on the two cylindrical supporting columns, and the handle threaded rod is installed on the cross rod. The clamping arms are installed between the two rectangular supporting columns, the clamping arms are divided into the front clamping arm and the rear clamping arm, ball head set screws are embedded in the clamping arms, and the clamping arms are installed on the rectangular supporting columns through the ball head set screws. The clamping jaws are divided into the left clamping jaw and the right clamping jaw, through holes and threaded holes are formed in the left clamping jaw and the right clamping jaw respectively, and the clamping jaws are tightened through screws. According to the utility model, the disassembly and assembly operations of the motor are optimized, the handle threaded rod is manually rotated, and the function of slowly and axially moving the end cover assembly in the shell assembly can be realized by utilizing the thread pair.