48results about How to "Prevent radial movement" patented technology

The utility model discloses an air spring support seat, an air spring and a vehicle, the air spring support seat comprises an upper air chamber assembly, a lower air chamber assembly, an upper air chamber assembly and a lower air chamber assembly, the upper air chamber assembly is provided with a first accommodating cavity; the top rubber assembly comprises an elastic body, the elastic body is provided with a first flange, the elastic body comprises a first cavity and a second cavity which are separated by the first flange, and at least one groove is formed in the first flange; the top rubber assembly is arranged in the first containing cavity, the first flange is attached to the bottom wall of the first containing cavity, and the first cavity is communicated with the second cavity through the groove. According to the technical scheme, the elastic body can be prevented from moving in the radial direction, and therefore the durability of the top rubber assembly is improved.

The present invention discloses a water purifier, comprising a shell and a water pump installed in the shell, an integrated water circuit board, and a plurality of filter elements detachably connected to the integrated water circuit board; a water inlet pipe for water to be filtered, a first purified water outlet pipe, a pressure barrel connecting pipe, a second purified water outlet pipe with a sensing switch connected at one end, a first filter element interface for connecting to a first filter element, a second filter element interface for connecting to a second filter element, a third filter element interface for connecting to a third filter element, and an inlet valve connecting pipe are integrally formed on the integrated water circuit board; the water inlet pipe for water to be filtered is connected to the first purified water outlet pipe after being filtered by the first filter element, and one end of the first purified water outlet pipe can be connected to the water inlet end of the second filter element via the water pump, the inlet valve, and the inlet valve connecting pipe in sequence; the present invention adopts an integrated water circuit board to realize convenient layout and connection, save space, and the filter element is quick to disassemble and assemble, firmly connected, and not easy to loosen and leak.

The invention discloses a turning device for a long and thin valve rod, and relates to the field of valve rod machining, the turning device comprises a machine body, a three-jaw chuck, a tip and a turning tool rest are arranged on the machine body, a sliding seat is arranged on the machine body in a sliding mode, the turning tool rest is located on the sliding seat, and the turning tool rest is located on the upper side of the valve rod; bearing wheels are symmetrically arranged on the side, located at the center, of the machine body, the two bearing wheels bear a valve rod, a mounting plate is arranged on the machine body in a lifting mode, a leveling wheel is rotationally connected to the mounting plate, sliding plates are arranged on the two sides, located on the mounting plate, of the machine body in a sliding mode, and bearing rods are arranged on the two sliding plates in a lifting mode; and a universal supporting ball is mounted at the upper end of the supporting rod. The machining quality of the long and thin valve rod can be improved.

The present application discloses a turning device for a wind turbine main shaft, which relates to the field of wind turbine main shaft processing, and includes a machine body, a three-jaw chuck, a center, a tool holder and a support assembly, wherein a slide seat is provided on the machine body for sliding movement, the tool holder is provided on the slide seat, the support assembly includes two supporting balls provided opposite to each other, the two supporting balls abut against the wind turbine main shaft, a sliding groove is provided on the slide seat, the slide seat is provided with two sliding blocks for sliding movement in the sliding groove, the two sliding blocks correspond to the two supporting balls one by one, the supporting balls are provided on the corresponding sliding blocks, the slide seat is provided with two compression springs in the sliding groove, the two compression springs are provided on the side away from the two sliding blocks, the length direction of the compression spring is consistent with the sliding direction of the sliding block, one end of the compression spring is connected to the corresponding sliding block, and the other end of the compression spring is connected to the inner wall of the sliding groove. The present application is helpful to improve the turning quality of the wind turbine main shaft.

The utility model discloses a nylon hinge convenient for adjusting torsion of a spring. The nylon hinge is characterized by further comprising an adjusting device which is arranged in a first hinge seat and a second hinge seat and enables the first hinge seat and the second hinge seat to be automatically opened or closed by adjusting the torsion; the adjusting device comprises limiting sleeves arranged in the two ends of the first hinge base and the two ends of the second hinge base, a positioning sleeve, a rotating rod penetrating through the limiting sleeves and used for adjusting torsion, and a torsional spring with one end connected with the rotating rod and the other end connected with the positioning sleeve. When the rotating rod rotates, the torsion spring is driven to deform, the larger the rotating rod rotates, the larger the deformation of the torsion spring is, and the larger the torsion between the first hinge seat and the second hinge seat is, so that the larger the opening and closing force of a part which is connected with the first hinge seat and the second hinge seat and needs to rotate is; the requirements on the opening and closing force of the hinge in different use scenes can be met.

The present application relates to the technical field of welding, and specifically discloses a motor liquid-cooled shell welding device, which comprises a workbench, a rotating disc, an inner-outer positioning mechanism, a coaxial positioning mechanism and a pressing mechanism. The inner-outer positioning mechanism, the positioning shaft, the insert, the positioning locking assembly and the pressing mechanism are used for multi-dimensional guarantee of the concentricity of the inner cylinder, the outer cylinder, the annular plate and the welding machine from the bottom, the top and the side, so that the problems of weld offset, uneven penetration, one-side wide and one-side narrow of the welding seam of the welding machine and the like caused by the rotation centrifugal force of the inner cylinder, the outer cylinder and the annular plate are effectively avoided. Meanwhile, the pressing mechanism is provided with a plurality of circumferentially uniformly distributed pressing assemblies, which are matched with the bearing steps on the inner cylinder and the outer cylinder to realize the up-down bidirectional limiting of the annular plate, prevent the annular plate from floating due to the centrifugal force during the rotation and affect the welding quality of the welding seam, and the wear-reducing roller can prevent the annular plate from floating and radial movement due to thermal deformation without affecting the rotation of the workpiece.

This invention discloses a sensing spring adjustment mechanism for mask mounting, belonging to the field of semiconductor lithography equipment technology. It includes a mounting base, a rotating shaft rotatably mounted on the mounting base, and a detection lever fixedly connected to the rotating shaft. Double torsion springs are sleeved at both ends of the rotating shaft, with the middle connecting end of the double torsion spring abutting against the bottom of the mounting base. A translational limiting mechanism is provided at the bottom of the mounting base, cooperating with the connecting end of the double torsion spring to guide and radially limit the movement of the connecting end. This invention uses double torsion springs instead of the traditional single-sided spring structure, providing a more balanced and stable reset force for the detection lever, ensuring the consistency and accuracy of the detection lever's reset action. Simultaneously, the double-sided support structure significantly reduces the risk of large deformation of the spring due to external force interference, fundamentally avoiding the problem of the spring detaching from the preset mounting slot.

The utility model discloses a fixing structure for a uterine cavity tube and an insertion needle of a gynecological tumor radiotherapy positioner, which belongs to the technical field of positioners and comprises a positioner main body, a plurality of groups of insertion holes are formed in the middle of the positioner main body, a plurality of groups of guide heads are fixed at the end parts of one sides of the insertion holes, and a plurality of groups of binding grooves are formed in the middle of each guide head. A rubber band is inserted into the middle of the binding groove; the binding groove increases the friction force in the guide head in the uterine cavity tube and the implantation needle, so that the uterine cavity tube and the implantation needle are fixed in the implantation hole, the uterine cavity tube and the implantation needle are prevented from moving in the radial direction, the stability of the uterine cavity tube and the implantation needle inserted into the positioner is improved, meanwhile, the positioner body is conveniently inserted into the vagina of a patient, and the operation is convenient. And the convenience of inserting the positioner main body into the vagina by an operator is improved.

The utility model discloses a stationary blade assembly, a turbine and a gas turbine, the stationary blade assembly comprises a holding ring, a stationary blade and an adjusting piece, the holding ring is provided with a holding ring groove and a through hole, and the through hole is formed in the outer side of the holding ring groove and penetrates through the outer side groove wall of the holding ring groove; the fixed blade is provided with a hook, and the hook is arranged in the ring holding groove and matched with the ring holding groove in a hooking mode. The adjusting part is connected with the holding ring in the mode that the position of the adjusting part can be adjusted in the inside-outside direction, the adjusting part is arranged in the through hole, and a part of the adjusting part extends into the holding ring groove. When the whole adjusting piece is located on the outer side of the ring holding groove, the space, used for containing the hook, in the ring holding groove is large, so that the gap between the hook and the ring holding groove is large, and the assembling efficiency of the stationary blade is improved. After one part of the adjusting piece extends into the ring holding groove, the gap between the adjusting piece and the hook is small, the static blade can be prevented from moving in the radial direction, and the operation safety of the turbine with the static blade assembly is improved.

The utility model discloses a wire passing rotating shaft which comprises a hollow shaft body, the shaft body comprises a first shaft shell and a second shaft shell which are oppositely arranged, the outer surface of the shaft body is provided with two annular grooves which are distributed at intervals in the axial direction, fasteners are arranged on the annular grooves, and the first shaft shell and the second shaft shell are detachably fixed through the fasteners. The coaxial cable connector has the advantages that the shaft body comprises the first shaft shell and the second shaft shell which are detachable, and when connectors at the two ends of the coaxial cable are large in size and cannot be detached, the first shaft shell and the second shaft shell which are detachable sleeve the coaxial cable in a buckling mode; the first shaft shell and the second shaft shell of the shaft body are detachably fixed through a fastener. The two clamp springs are respectively propped against two sides of the control box body and the main body, so that the shaft body is axially fixed with the control box body and the lower end of the main body; the coaxial line penetrates through the shaft body, so that the effect of protecting the coaxial line from being abraded is achieved; the non-planar matching surface I arranged on the shaft shell I and the non-planar matching surface II arranged on the shaft shell II are oppositely buckled, so that radial movement during buckling can be prevented.

The utility model provides a sealing end cover with a radial positioning structure, which comprises a bearing assembly component, a transfer positioning component, a limit support component, a radial positioning component, an external connection matching component and an axial limit component, and the radial positioning component of the sealing end cover is mounted in the limit support component through a movable connection structure. According to the sealing end cover, the limiting support component is arranged in the through-connection positioning component and is matched with the sealing static ring, the stability of the sealing static ring in the radial direction can be guaranteed, radial movement of the sealing static ring in the operation process is prevented, and therefore the reliability of the sealing state is guaranteed; the limiting support component corresponds to the through-connection positioning component in position and is used for supporting and fixing other components; the external connection matching component is located in the limiting supporting component and matched with the radial positioning component, the axial limiting component conducts axial limiting on the external connection matching component, the double-limiting design ensures the stability and the sealing performance of the sealing end cover in the operation process, and the operation reliability of the sealing end cover is further improved.

A motor protection system disclosed by the present invention comprises a disassembly and assembly device and a protection kit, the disassembly and assembly device comprises a working platform, and a translation mechanism, a clamping mechanism and a liquid supplementing device which are arranged on the working platform, and the translation mechanism moves in a direction close to or away from the clamping mechanism; the protection suite comprises a connecting plate and two pin protection shells, the connecting plate is arranged between the two pin protection shells, slots matched with motor pins are formed in the bottom sides of the protection shells, and the liquid supplementing device is communicated with the inner sides of the slots and used for supplementing a conductive agent; an anti-oxidation layer is arranged on one side, corresponding to the top side of the protective shell, of the slot. According to the motor protection system, manual dismounting of the protection sleeve and addition of the conductive agent are conveniently replaced.

The utility model belongs to dust removal technical field, concretely provides a base station and dust collecting system for dust catcher. The base station of current existence cannot take into account the problem of the appearance and convenience of base station, for this, the utility model provides a base station for dust catcher, it includes main part and base. Among them, the main part is used for fixing the dust catcher, the base is arranged in the bottom of the main part, and with the main part rotatable connection, so that the dust catcher fixed to the base station can rotate relative to the base station. The utility model solves the above technical problem.

This utility model relates to a rotating needle mechanism, including a needle bar installed inside a machine housing. The needle bar has a hollow tubular structure and also includes a fixed sleeve, a transmission sleeve, a needle holder, and a stepper motor. The fixed sleeve is fixedly connected to the machine housing. The upper end of the transmission sleeve is inserted into the fixed sleeve. The upper end of the needle holder is connected to the inner wall of the needle bar. The outer wall of the lower end of the needle holder and the inner wall of the transmission sleeve have a spline structure that mates with each other. The needle holder has a needle insertion hole with an opening facing downwards, into which a sewing needle is inserted. The needle bar rotating mechanism of this utility model has stronger adaptability and can be compatible with multiple types of template machines and sewing scenarios. The core components of this mechanism adopt a modular design: the fixed sleeve is fixed to the machine housing by bolts. Only the length of the fixed sleeve needs to be adjusted according to the machine housing size of different template machines to achieve quick adaptation without redesigning the overall structure of the mechanism.

The utility model belongs to dust removal technical field, concretely provides a base station for dust catcher. The base station of current existence cannot take into account the problem of the appearance and convenience of base station, for this, the utility model provides a base station for dust catcher, it includes main part, base and drive arrangement. Among them, main part is used for fixing dust catcher;The base is set in the bottom of main part, and is rotatable with main part, so that the dust catcher fixed to the base station can rotate relative to the base station;Drive arrangement is used for driving main part to rotate. The utility model solves above -mentioned technical problem.

The invention relates to a pressure device-controlled countersinking tool (1), which has one or more cutting tools (7) arranged in a rotatably driven base body (2), the tools being operable in their pivoting position by means of a feed pressure device (13), wherein at least one tool (7) is actuated via at least one piston-cylinder unit (24, 25) actuated by the pressure device (13), wherein the at least one tool (7) is pivotally mounted on a bearing pin (9) configured as a pivot axis (9a) and can be pivoted out of a tool cavity (5) arranged in a tool housing (3), wherein a centering device (21, 23; 42, 43) is arranged between the tool (7) and a tool window (6) of the base body (2) at a radial distance (44, 45, 46) from the pivot axis (9a) and in the pivoting region of the at least one tool (7).

The utility model relates to the technical field of petroleum drilling equipment, concretely relates to a straight turbine drilling tool, the straight turbine drilling tool includes: the casing assembly is provided with the input of installation cavity for going into the drilling fluid, the main shaft subassembly is set up in the installation cavity, the one end of main shaft subassembly is connected with casing assembly through turbine fixed -rotor subassembly close to the input, the other end of main shaft subassembly is used for connecting the drill bit, the casing assembly is connected by a plurality of partial casing in turn, and the conical thread structure is connected between two adjacent partial casings. The scheme adopts the conical thread structure, can effectively disperse load to can directly eliminate the stress concentration phenomenon of straight thread both ends, makes the casing assembly can bear greater axial, radial, vibration load, avoids the problem that the connecting part of two adjacent parts is easy to break. The scheme improves the reliability of drilling tool, prolongs the working life.

The utility model discloses a positioning tool for processing inclined holes on the top surface of a glass forming mould, which comprises a base plate, a supporting plate, a positioning block and an arc-shaped plate, the supporting plate is arranged on the base plate in a turnover manner, the positioning block is arranged on the supporting plate, a V-shaped groove is arranged on the front surface of the positioning block in an inward concave manner, the glass forming mould is placed on the supporting plate, and the arc-shaped plate is arranged on the glass forming mould. The back face of the glass forming mold makes contact with the inner wall of the V-shaped groove, an arc-shaped convex rib located above the positioning block is arranged on the back face of the glass forming mold, an arc-shaped groove is formed in the bottom of the arc-shaped convex rib in an inwards-concave mode, the arc-shaped plate abuts against the back face of the glass forming mold, and the top of the arc-shaped plate extends into the arc-shaped groove. A vertical plate located behind the cambered surface plate is arranged on the positioning block, a first stud backwards penetrating through the vertical plate is arranged on the back face of the cambered surface plate, positioning of the glass forming mold is enhanced, and the angle of the positioning block can be adjusted through vertical overturning of the supporting plate so as to adapt to the angle of an inclined hole.

The utility model belongs to the technical field of tire equipment manufacturing, and particularly relates to a lifting swing arm type tire storage device which comprises a stand column, a lifting device is arranged on the stand column, the lifting direction of the lifting device is parallel to the axis of the stand column, a mounting base is fixedly arranged at the execution end of the lifting device, a transverse rod is arranged on the mounting base, and a tire storage plate is arranged at the end, away from the mounting base, of the transverse rod. A servo cylinder is rotationally arranged on the mounting seat far away from the cross rod, the servo cylinder is perpendicular to the stand column, and the free end of a piston rod of the servo cylinder is rotationally connected between the two ends of the cross rod; according to the lifting swing arm type tire storage device, green tires can be conveniently loaded on the ground, the lifting swing arm type tire storage device can be conveniently matched with an aerial green tire transportation system to load the green tires, and the distance for manually carrying the green tires cannot be reduced; the problems that an existing tire storage device cannot be matched with an aerial green tire conveying system to load green tires, and the labor intensity is high due to the fact that the distance for manually carrying the green tires is long are solved.

An instant heating faucet with a temperature control reset structure comprises a shell, an upper cover and a water heating cavity, the upper cover and the temperature control reset structure are arranged at the upper end of the shell, the water heating cavity is formed in the shell, the temperature control reset structure comprises a temperature controller, a mounting seat and a cover plate, the mounting seat is arranged in the upper cover, a cavity is formed in the mounting seat, and the temperature controller is arranged in the cavity. The temperature controller is arranged in the cavity, the cover plate is connected with the lower portion of the installation base, a temperature sensing face is arranged at the lower end of the temperature controller, and a first through hole communicated with the temperature sensing face and the heating water cavity is formed in the cover plate. Therefore, the current of the heating pipe in the heating water cavity is cut off, and scalding caused by too high heating temperature is avoided.

The utility model relates to the technical field of assembly, and discloses an assembly device based on a worm and gear lifter, which comprises a worm and gear lifter, a support seat is fixedly mounted on the lower side of the worm and gear lifter, a platform is fixedly mounted on the upper side of the worm and gear lifter, and two groups of slideways are arranged on the upper side of the platform in bilateral symmetry. A base is slidably mounted on each slide way, a movable plate is rotatably mounted on the upper side of each base, the ends, close to each other, of the movable plates are rotatably assembled through a rotating seat, universal balls are mounted on the upper sides of the movable plates, and a limiting adjusting mechanism is mounted between the rotating seat and the platform and located between the two slide ways. According to the utility model, the rotating seats can be conveniently lifted and adjusted through the limiting adjusting mechanism, and the postures of the two rotating seats can be changed so as to adapt to a part with a flat bottom and a part with an arc surface, so that the workload of hoisting equipment is reduced, the assembly precision is improved, and in addition, the difficulty of translation assembly of the part can be reduced through the arrangement of a universal ball.

The utility model relates to the field of heat exchangers, in particular to a heat exchanger sealing box. The sealing box comprises side box plates, top plates, sealing plates, stand columns, protruding points, round holes and sealing pieces, the four side box plates fixedly connected together form an outer frame body, the top plates are fixedly connected to openings in the two ends of the frame body respectively, an inner frame body is fixedly connected into the outer frame body, and the inner frame body is composed of four sealing plates fixedly connected together. A sealing piece is arranged between the stand column and the sealing plate, a plurality of protruding points are sequentially arranged on the outer wall of the stand column, and a plurality of round holes used for being matched with the protruding points are sequentially formed in the side box plate. The positions of the stand columns and the side box plates are rapidly positioned through the convex points on the stand columns and the round holes in the side box plates, and the side box plates can be prevented from moving in the radial direction. And the sealing performance is improved through a sealing piece.

The utility model discloses a cleaning robot, and belongs to the field of cleaning equipment. The cleaning robot comprises a shell, a cleaning brush and a driving source, the cleaning brush and the driving source are both arranged in the shell, the driving source comprises a driving body and a driving shaft which are connected, the driving shaft is connected with the end of the cleaning brush so as to drive the cleaning brush to rotate relative to the shell, and the cleaning robot further comprises a first blocking piece which is connected with the shell. The first blocking piece is located at the end of the cleaning brush, and a first gap for the cleaning brush to rotate is formed between the first blocking piece and the circumferential face of the cleaning brush so that foreign matter can be prevented from entering the driving shaft through the first gap. The cleaning robot further comprises a second blocking piece, the second blocking piece is arranged in a protruding mode relative to the circumferential face of the cleaning brush, and the second blocking piece prevents foreign matter from entering the driving shaft in the axial direction of the cleaning brush. Through the arrangement, the working process of the driving source is prevented from being affected, and the service life of the driving source is guaranteed.

The application discloses a spring and a spring mounting tool, comprising a limiting assembly and a calibration assembly, the limiting assembly and the calibration assembly are respectively located on both sides of the spring axis, the limiting assembly limits the axis position of the spring, the calibration assembly comprises a power part and a transmission head, the power part drives the transmission head to rotate, the transmission head is in abutment with one end of the spring in the axial direction, and drives the spring to rotate along the axis under the driving of the power part. The application limits the spring through the limiting assembly and the calibration assembly, and drives the transmission head to rotate through the power part to drive the spring to rotate, the rotation process of the transmission head can calibrate the spring to control the assembly angle and position of the spring, solves the poor contact problem caused by the assembly angle deviation of the spring in the prior art, and improves the assembly consistency and reliability.

The application provides a damping device and a wheelchair. The damping device comprises a support, a first limiting rod arranged on the support, a driving device fixedly connected with the support, an output end of the driving device connected with a wheel, the driving device being used for driving the wheel to rotate relative to the support, a swing arm fixed on the driving device, one end of the swing arm being rotatably connected with the support, the other end of the swing arm being provided with a connecting portion, an elastic member, the inside of the elastic member being hollow, one end of the elastic member being connected with the connecting portion, one end of the first limiting rod extending into the elastic member from the other end of the elastic member, the other end of the elastic member being abutted against or fixedly connected with the support, and the elastic member being elongated or contracted along the extension direction of the first limiting rod when the swing arm rotates. The application can improve the safety of the damping device.

The utility model relates to a high-pressure-resistant dry gas sealing device which comprises a shaft sleeve, a cavity, a movable ring assembly and a static ring assembly, the shaft sleeve is fixed on a rotating shaft, the movable ring assembly is fixed outside the shaft sleeve and rotates synchronously with the shaft sleeve, the static ring assembly is fixed in the cavity, and the cavity is fixed on the rotating shaft. The moving ring assembly and the static ring assembly abut against each other to form a first sealing face, the static ring assembly comprises a spring seat, a static ring, a spring and a ring pushing unit, the spring seat is fixed to the cavity, the static ring and the spring seat are fixed through an anti-rotating pin, the front end of the static ring abuts against the moving ring assembly to form the first sealing face, and the spring is fixed to the spring seat through an anti-rotating pin. The tail end of the static ring abuts against the push ring unit to form a second sealing face, and the spring is arranged between the spring seat and the push ring unit. The sealing device has a good sealing effect on sealing of high-pressure media, and is long in service life.

The application relates to a bidirectional ratchet structure and a bidirectional ratchet wrench, wherein the bidirectional ratchet structure comprises a shell, a ratchet, a tenon, a first pawl, a second pawl, a first elastic piece, a second elastic piece and a stop block; the shell is internally provided with a cavity; the ratchet is rotatably arranged in the cavity; the tenon is fixedly connected with the ratchet; the first pawl and the second pawl are respectively arranged on the two sides of the ratchet; the first elastic piece is arranged on the side of the first pawl away from the ratchet; the two ends of the first elastic piece are respectively abutted against the inner wall of the cavity and the first pawl; the second elastic piece is arranged on the side of the second pawl away from the ratchet; the two ends of the second elastic piece are respectively abutted against the inner wall of the cavity and the second pawl; the stop block is rotatably arranged between the first pawl and the second pawl; the two ends of the stop block towards the first pawl and the second pawl are respectively provided with stop protrusions; the stop protrusions push the first pawl or the second pawl to be disengaged from the ratchet. The application has the effect of being capable of meeting more working conditions.

The utility model relates to a stereo garage lifting platform positioning device. The stereo garage lifting platform positioning device comprises a sliding device and a limiting device which are arranged between a guide sliding way and a lifting arm. The guide slideways are channel steel; an opening of the channel steel faces the lifting arm, and the sliding device comprises a radial guide device and a circumferential guide device; the limiting device comprises a positioning hole, a positioning rod, a guide sleeve, a connecting rod, a turntable and a speed reducer; the edge part of the turntable is hinged with the other end of the connecting rod; the radial guide device comprises a first pin shaft and a first roller; the circumferential guide device comprises a second roller, a second pin shaft and a bracket; the lifting platform has the beneficial effects that when the lifting platform is flush with the parking platform and a vehicle needs to be parked and picked, the telescopic positioning rods arranged on the lifting arms are inserted into the positioning holes, so that hard limiting of the lifting arms up and down is achieved, the lifting platform is prevented from shaking, and potential safety hazards are eliminated.

The utility model discloses an anti-skidding and anti-loosening compression roller, which relates to the technical field of sand making equipment, and comprises a roller skin 1, a hub and a pair of left and right pressing rings 4, the hub comprises an outer cylinder 12, an inner cylinder 11 and a rib plate 9, and the outer cylinder 12 is connected with the inner cylinder 11 through the rib plate 9; the roller skin 1 is sleeved on the outer cylinder 12, and the left and right pressing rings 4 are respectively pressed at the joints of the inner hole of the roller skin 1 and the left and right ends of the outer cylindrical surface of the outer cylinder 12; an annular groove is further formed in an inner hole of the roller skin 1, and more than one convex-ring-shaped radial reinforcing rib 7 is further arranged on the groove bottom wall of the annular groove. And curing glue 8 is also poured into a cavity between the groove bottom wall of the annular groove of the roller skin 1 and the outer cylindrical surface of the outer cylinder 12. The anti-skid and anti-loosening sand making device has the characteristics of low cost, skid resistance, loosening resistance and the like, is applied to a double-roller sand making machine, and can be used for mineral separation, powder making or preparation of sand for buildings by using various non-metal ores, mine tailings, industrial waste residues and other raw materials meeting the sand making requirement.