36889 results about "Rack and pinion" patented technology

The invention relates to a system friction torque estimation method and device, a steer-by-wire system and a vehicle. The estimation method is applied to the steer-by-wire system, the steer-by-wire system comprises a steering execution module, a rack of the steering execution module is hinged to a steering tie rod, the other end of the steering tie rod is hinged to a steering knuckle arm, the steering knuckle arm is fixedly connected with a tire, and the rack pulls the steering tie rod to reciprocate so as to drive the steering knuckle arm and the tire to rotate around a main pin. The estimation method comprises the following steps: observing through a sliding-mode observer to obtain an estimated value of the lateral force of the front axle; obtaining a function relationship between the lateral force of the front axle and the moment Mkp of the main pin; the estimated rack force is obtained on the basis of Mkp = Frack, the function relation between the front axle lateral force and the master pin moment Mkp and the estimated value of the front axle lateral force, Frack is the rack force, and rack is the length of a steering knuckle arm; and obtaining an estimated system friction torque based on the estimated rack force and the system friction torque-rack force function model.

In one embodiment, a seat may have a seat base substrate that has a flexible main member. The seat may also have a drive mechanism that has a lower slide and an upper slide. The upper slide may selectively move with respect to the fixed lower slide via a rack and pinion system. The seat may also have a pusher releasably attached to the upper slide. The pusher may contact the flexible main member. The seat may also have a trim ring attached to the lower slide.

The invention discloses a maritime work crane with a windproof high-stability structure, and belongs to the technical field of maritime work cranes, the maritime work crane is provided with a supporting column convenient to position and assemble, the upper surface of the supporting column is rotatably connected with a suspension arm, the inner surface of the suspension arm is telescopically connected with a telescopic arm, and the front side of the inner surface of the telescopic arm is rotatably connected with a guide wheel; comprising a main lifting rope rotationally connected to the outer surface of the guide wheel, and the lower side of the main lifting rope is installed on the lower surface of the telescopic arm. An angle monitoring mechanism is arranged, the angle of the rotating frame on the telescopic arm can be conveniently controlled, adjustment of a first straight tooth gear and a first rack can be matched, so that the rotating stability of the rotating frame is controlled, and adjustment of a clamping jaw and a limiting wheel is matched, so that the angle of the clamping jaw on the rotating frame is driven through the limiting wheel; therefore, the angle stability of the clamping jaw and the angle monitoring convenience of the main lifting rope are controlled, lifted goods are prevented from inclining, and danger is avoided.

An electronic device is provided. The electronic device comprises a housing assembly comprising a first housing and a second housing configured to rotate with respect to the first housing, a hinge module that is coupled to the first housing and the second housing, the hinge module comprising a rotation gear, a gear assembly comprising a pinion gear rotatably coupled to the rotation gear, a rack gear configured to slide in a first axial direction based on rotation of the pinion gear, a cam structure coupled to the rack gear, and a foot structure coupled to the first housing, the foot structure being moveable in a second axial direction that perpendicular to the first axial direction, based on a first movement of the cam structure and moveable in a third axial direction that perpendicular to the first axial direction, based on a second movement of the cam structure.

The invention provides a positioning device for accurate construction of a stand column pile and a positioning method of the positioning device, and relates to the technical field of building foundation construction.The positioning device comprises a pile casing, a reinforcement cage, the stand column pile and a latticed column, and the pile casing is provided with an accurate positioning assembly.According to the positioning device, an operator starts a transmission motor, and the output end of the transmission motor drives a gear to rotate; the gear drives the arc-shaped rack and the first limiting block to rotate, and due to rotation of the first limiting block, the first limiting block can drive the rotating rods to rotate in the first limiting block, so that the distance between the rotating rods can be adjusted, then the positioning plate is adjusted to a proper angle, the nut is tightened, and the positioning plate is fixed; and the stand column piles can be moved to the foundation pit through the first rolling wheels, precise positioning of the stand column piles with different diameters is achieved, and therefore the technical purpose of precise positioning of the stand column piles with different diameters is achieved.

The invention relates to the technical field of plastic pipe cutting machines, in particular to a plastic pipe cutting machine capable of improving pipe stability, comprising a workbench, and a cutting mechanism, a polishing mechanism and a driving mechanism mounted on the workbench; before the cutting mechanism cuts the plastic pipe, the plastic pipe can penetrate through the position between the two fixing rings, a cutting point can be placed in the middle of the position between the two fixing rings, the distance between the two fixing rings is adjusted through the driving mechanism, and due to the fact that a gear is meshed with a rack, the cutting point can be adjusted. Therefore, simultaneous radial movement of the racks arranged on the fixing ring in a circumferential array mode is achieved, clamping of the plastic pipe is completed, stability during cutting is guaranteed, and the problems that during cutting, a cutting opening is expanded, the plastic pipe at the cutting end inclines due to the gravity of the plastic pipe, cutting accuracy is affected, resistance during rotating and cutting is increased, and cutting quality is improved are solved. Random rotation during cutting is avoided, the clamped plastic pipe can rotate in the radial direction along with rotation of the second magnetic ring, all-directional cutting is achieved, and accuracy is improved.

A rack pulley system for use with an exercise machine includes an upper pulley system to removably secure to a vertical post and having an upper housing mounted to an upper brace, the upper brace to engage with the vertical post; and upper cable guides supported by the upper housing and to support a cable traveling therethrough; a lower pulley system to removably secure to the vertical post and having a lower housing mounted to a lower brace, the lower brace to engage with the vertical post; and lower cable guides supported by the lower housing and to support the cable traveling therethrough; a trolley to engaged with the vertical post between the upper pulley system and the lower pulley system and to traverse along the vertical post, the trolley having a trolley cable guide to connect the trolley to the cable.

The utility model belongs to the technical field of cold rolling mills, and particularly relates to a seamless steel tube cold rolling mill which comprises an installation plate, a sliding groove is formed in the installation plate, a sliding block is installed in the sliding groove in a sliding mode, a cleaning brush is fixedly installed on the top side of the sliding block, a rack is fixed to one side of the installation plate, an L-shaped plate is installed on one side of the cleaning brush, and a servo motor is installed in the L-shaped plate. A pinion is mounted at the output end of the servo motor; the servo motor operates to drive the pinion to rotate, rotation of the pinion can be converted into linear motion along the rack, the linear motion of the pinion drives the cleaning brush to stably slide along the sliding groove through the L-shaped plate, the surface of the steel pipe can be comprehensively and efficiently cleaned along with sliding of the cleaning brush, and the product quality and the subsequent machining efficiency are improved.

The invention relates to the technical field of reagent detection, and discloses a reagent detection device and a using method thereof.The reagent detection device comprises a fixing base, a supporting base is arranged on the outer side of the fixing base and driven by a motor in the fixing base, a plurality of reagent mixing mechanisms are installed on the supporting base, and each reagent mixing mechanism comprises a first rotating sleeve; the end part of a rotating shaft of the first rotating sleeve is connected with a support frame, a second rotating sleeve is rotationally arranged in the first rotating sleeve, and the second rotating sleeve is used for clamping a reagent tube. According to the reagent detection device, when a supporting seat rotates, a first transmission gear is in intermittent contact with an arc-shaped rack, so that a first rotating sleeve drives a reagent tube to perform inclination state adjustment, and meanwhile, a second transmission gear is meshed with a fixed gear ring to generate rotation, so that the second rotating sleeve drives the reagent tube to quickly rotate; therefore, the reagent tube rapidly rotates in an inclined state to drive the solution in the reagent tube to roll over, so that the solutions at different heights are mixed and exchanged, and the mixing effect of the solutions is improved.

The invention relates to the technical field of sucker rods, and discloses a sucker rod centralizer which comprises a centralizing sleeve, a short section, compensation sleeves and an elastic sleeve, connecting rods are integrally formed at the tops and the bottoms of the two compensation sleeves correspondingly, and racks are integrally formed at one ends of the connecting rods; when two groups of semicircular compensation sleeves are close to each other and mounted between first limiting rings at two ends of a centralizing sleeve, connecting rods and racks at two ends of the compensation sleeves are close to a turntable at the top of a supporting plate, and after the two groups of compensation sleeves are fixed by extruding a pressure spring, the two groups of racks in the same plane can be in meshing transmission with a first gear ring; a first clamping plate at the top of the rotary table can expand or contract along an arc-shaped positioning groove under the cooperation of a positioning rod and a guide groove, so that sucker rods with different diameters penetrating through a centralizing sleeve can be clamped and positioned, and synchronous work of a compensation sleeve and a clamping mechanism at the top of a supporting plate is achieved; and the centralizer can be conveniently and quickly disassembled and assembled.

The invention relates to the technical field of steel box girder welding, and particularly discloses a steel box girder welding positioning device which comprises a fixing assembly fixed to a bottom plate and a positioning assembly connected with a web, and the positioning assembly comprises a bearing plate assembled on the fixing assembly in an up-down sliding mode and a first positioning piece for positioning the web front and back. The first positioning piece comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are assembled on the bearing plate in a front-back sliding mode to clamp the web, racks are arranged on the first clamping plate and the second clamping plate, guide gears matched with the racks are arranged on the bearing plate, and a guide rod is assembled on the bearing plate in a sliding mode, penetrates through the guide gears and is in threaded fit with the guide gears. A baffle is arranged at the end of the guide rod, a limiting plate is arranged on the fixing assembly, and an adjusting assembly used for adjusting the distance between the web and the bottom plate is arranged on the fixing assembly. The steel box girder welding positioning device has the effect of improving the welding quality.

The invention discloses an electronic assembly welding workbench. Comprising a gantry workbench structure, a smoke suction mechanism, a welding angle adjusting mechanism and a double-station clamping mechanism. A rotating cylinder is arranged on the surface of the smoke suction cylinder through matching of a driving worm and a worm gear ring so as to realize multidirectional angle adjustment of the welding gun; the circuit board is rapidly clamped through the action of the rack, the driving gear and the extrusion convex strip, and double-station cross feeding and discharging are achieved; the smoke suction mechanism concentrates and efficiently discharges smoke through a horn and a corrugated pipe; and automatic multi-angle welding can be implemented by combining a tin wire placing machine and a sensor, so that the welding efficiency and quality are remarkably improved.

An air inlet for an aircraft propulsion unit having a movable upstream portion, a stationary downstream portion and at least one member for longitudinally translating the movable upstream portion between a retracted position in which the movable upstream portion is adjacent to the stationary downstream portion, and an extended position in which the movable upstream portion is separated from the stationary downstream portion, the moving member having at least one guiding bar connected to the movable upstream portion and a drive bar having a plurality of teeth, the stationary downstream portion having, for each moving member, a gear wheel configured to co-operate with the teeth in order to form a rack-and-pinion connection and at least one guiding member of the guiding bar.

The invention discloses an adjustable turnover mold core type mechanical arm and a using method thereof, and relates to the field of mold core mounting, the adjustable turnover mold core type mechanical arm comprises a base and a mechanical arm body mounted at the top of the base, a turnover mechanism is mounted at the output end of the mechanical arm body, and a positioning mechanism is mounted on one side of the turnover mechanism. The air cylinder pushes the connecting plate to move and drives the moving frame and the second rack to slide, the racks apply transverse force to enable the gear to rotate, then the angle of the rotating rod is adjusted, mold core overturning is achieved, meanwhile, the first rack is matched with the gear, and the overturning angle is flexibly adjusted through combined control of the limiting rod and the threaded rod; the limiting rods and the threaded rods ensure that the angle is accurately controlled during small-angle operation, efficient installation can be kept during large-angle overturning, the design meets the installation requirements of different mold cores, and the flexibility, installation precision and efficiency of a production line are improved.

The invention provides high-precision flexible panel laser cutting equipment. The high-precision flexible panel laser cutting equipment comprises a cutting box; the laser cutting machine body is arranged in the cutting box; the two supporting seats are symmetrically arranged on the inner bottom wall of the cutting box; stable lifting of the lifting ring and the suction cup is achieved through accurate rotation of the driving screw rod, in the reset process of the supporting base, the driving rack drives the transmission gear and the driving screw rod to rotate, and it is ensured that the driving screw rod can only rotate in one direction through cooperation of a ratchet wheel and a pawl; by means of the design, it is guaranteed that the suction cup can be accurately pressed on the flexible panel for adsorption, damage to the flexible panel caused by too large adsorption force is avoided, the integrity of the flexible panel is effectively protected, and by means of use of the limiting assembly, the flexible panel is prevented from being damaged by too large adsorption force. And the driving screw rod can be reversely driven, so that the flexible panel is driven to be separated from the supporting seat through the suction cup, and the flexible panel is taken out.

The invention provides a cable protection pipe butt welding device, and relates to the technical field of welding, the cable protection pipe butt welding device comprises a welding table, two butt joint tables are arranged at the top end of the welding table, two fixing seats are fixedly mounted at the top ends of the butt joint tables, and a fixing assembly for fixing a cable protection pipe is arranged between the two fixing seats; a grinding assembly used for grinding the cable protection pipe is arranged in the middle of the welding table, the fixing assembly comprises two supporting frames fixedly connected to the top end of the butt joint table, an annular rack is rotationally connected between the two supporting frames, and a clamping assembly used for fixing the cable protection pipe is arranged on the inner wall of the annular rack. Annular guide rails are fixedly connected to the two sides of the outer surface of the annular rack, the cable protection pipe is fixed to an inner cavity of the annular rack through the clamping assembly, the cable protection pipe can rotate according to changes of the welding position through the annular rack, the flatness of the welding position is guaranteed through the grinding assembly, and the welding efficiency and quality of the device are effectively improved.

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

A dehumidifier according to an embodiment may include a housing including a suction grill formed on a rear surface thereof, and a discharge port formed on an upper surface thereof; a dehumidification module provided inside of the housing; a water tank detachably provided on one side of the housing and that stores condensate generated during a dehumidification process; a discharge cover that opens and closes the discharge port; a tilting module connected to a bottom of the discharge cover inside of the housing to tilt the discharge cover; and a shielding cover that accommodates the tilting module. The dehumidification module may include at least a compressor, a condenser, an evaporator, and a fan module. The tilting module may include a tilting motor fixed to the shielding cover; a tilting gear connected to a shaft of the tilting motor; and a tilting neck curved at a predetermined curvature and having on one surface thereof a tilting rack that engages with the tilting gear.

The invention discloses a steel structure butt welding adjusting device and method, and relates to the technical field of steel structure welding, the steel structure butt welding adjusting device comprises a welding table, fixing seats are symmetrically and fixedly connected to the upper end face of the welding table, steel pipe bodies are placed above the fixing seats, and the steel pipe butt welding adjusting device further comprises a steel pipe alignment detection mechanism and a welding path pretreatment mechanism; the steel pipe alignment detection mechanism comprises symmetrically-arranged circular rings, annular grooves are formed in the two sides of each circular ring, supporting frames are arranged on the two sides of each circular ring, the supporting frames are fixedly connected to the upper end face of the welding table, the circular rings are rotationally connected between the two supporting frames through the annular grooves, and annular racks are fixedly connected to the outer surfaces of the circular rings. The annular racks are in meshed connection with transmission gears, and a driving shaft is fixedly connected between the two transmission gears in a penetrating mode, so that the alignment condition can be rapidly detected after the steel pipe body is placed, a worker can rapidly conduct adjustment according to the detection result, the time for manual repeated inspection and adjustment is shortened, and the steel pipe body adjusting efficiency is improved.

Methods and apparatus to determine rack force are disclosed. An example apparatus includes a rack to couple to a steering knuckle of a vehicle, a ball nut engaged with the rack, a first ring gear coupled to the ball nut, a first pinion fixed to a motor, the first pinion engaged with the first ring gear, the motor to rotate the ball nut to move the rack, a motor encoder to detect a rotation of the first pinion, a second ring gear coupled to the ball nut, and a sensor fixed to a second pinion, the second pinion engaged with the second ring gear, the second pinion to rotate as the second ring gear rotates, the sensor to detect a rotation of the second pinion, the rotation of the second pinion and the rotation of the first pinion corresponding to a force on the rack.

In accordance with at least one aspect of this disclosure, an adjustable stock system for weapons and / or other suitable devices incudes an adjustable stock, a mounting box defining an interior cavity and a mounting feature configured to mount the adjustable stock to a device, and a moveable assembly including one or more moveable components configured to move relative to the mounting box. The moveable assembly comprises, at least, a rack and pinion assembly configured to bias a buttpad toward an extended position, and a rack stop configured to hold the rack and pinion assembly in place at a desired position.

The utility model relates to the technical field of metal material welding, in particular to a black metal smelting rolled product welding device which comprises a base, two metal pipes horizontally placed above the base and with the two ends aligned, and a welding head arranged at the upper end of the base. The first motor is driven to drive the second gear to rotate on the rack, so that the welding positions of the metal pipes abut against each other, the metal pipes with different length specifications and outer diameter specifications are extruded, fixed and welded, it is guaranteed that the welding positions of the metal pipes are kept in a stable abutting state all the time when the metal pipes are welded, and the welding quality and efficiency are improved; and meanwhile, a second electric telescopic rod drives a first electric telescopic rod to stretch out and draw back to the welding position of the metal pipe, and then the first electric telescopic rod drives a welding head to abut against the metal pipe, so that the welding head conducts comprehensive welding work on all the welding faces of the metal pipe.

The invention relates to the technical field of concrete detection, in particular to precast concrete strength detection equipment which comprises a detection table, the top end of the detection table is fixedly connected with a portal frame, the top end of the portal frame is provided with a hydraulic cylinder, and the driving end of the hydraulic cylinder is fixedly connected with a pressure detection plate. A positioning assembly is arranged in the detection table, a cleaning assembly is arranged in the placing groove, and an air blowing assembly is arranged on the upper portion of the cleaning assembly. Compared with the prior art, the protection assembly is arranged on the periphery of the containing groove, the protection assembly can be driven to be unfolded in the downward moving process of the pressure detection plate, a first rack can be used for driving a first gear to rotate while the side edges move towards the two sides, and then a turning plate can be driven to turn over, so that the side plates and the turning plate surround the periphery of the containing groove to form a baffle; and the protection effect is achieved, fragments which are broken and splashed in the detection process of the concrete prefabricated part can be blocked, and the safety in the detection process is improved.

The invention relates to the technical field of gear forging, and discloses a heat pipe type gear blank forging die which comprises a supporting rod, a machining table is fixedly connected to the top of the supporting rod, a pressing mechanism is arranged on the left side in the machining table, a movable feeding mechanism is arranged on the right side in the machining table, and a clamping mechanism is arranged at the back end of the machining table. The movable feeding mechanism comprises a moving assembly and a feeding assembly, the moving assembly is arranged on the right side in the machining table, the feeding assembly is arranged on the top of the moving assembly, the moving assembly comprises a supporting frame, and the supporting frame is fixedly connected to the bottom of the machining table. The first rack drives the second rack to move through the rotating gear, the second rack drives the push plate to move through the moving block, the push plate can drive the moving frame to move, the moving frame can drive the clamped blank to move to the top of the lower die, workers can conveniently feed the blank, the workers do not need to manually feed the blank, and the working efficiency is improved. The dangerousness is reduced.

The invention relates to the technical field of drilling equipment, in particular to a blasting drilling device for tunnel precise blasting construction and a using method thereof.The blasting drilling device comprises a mounting main body, a rotating mechanism is arranged on the mounting main body, a connecting assembly is arranged on the rotating mechanism, and a translation mechanism is arranged on the connecting assembly; a limiting assembly is further arranged on the mounting body, a limiting adjusting mechanism is arranged between the translation mechanism and the mounting body, and a drilling machine is fixedly connected to the translation mechanism. According to the drilling machine, through the arranged limiting adjusting assembly, in the process that the sliding plate drives the drilling machine to drill and complete resetting, a rack can be driven to move and be engaged with a gear ring, the gear ring is made to rotate, accordingly, a limiting stop lever is driven to rotate by a certain angle, and the rotated limiting stop lever serves as a position mark and can be used for controlling the rotating angle of the drilling machine; and accurate positioning of the drilling machine is ensured.

The invention discloses a three-way pipe arc core-pulling structure, an injection mold and a demolding method.The arc core-pulling structure comprises a driving rack and a sliding limiting seat, an arc-shaped sliding block is arranged on the sliding limiting seat, an arc-shaped core-pulling insert is arranged on the arc-shaped sliding block, the arc-shaped core-pulling insert and the arc-shaped sliding block are the same in bending rate, and the circle centers of the arc-shaped core-pulling insert and the arc-shaped sliding block coincide; a rotatable transmission gear is arranged on the sliding limiting base, arc-shaped meshing teeth are arranged on the arc-shaped sliding block, and the transmission gear is connected with the driving rack and the arc-shaped meshing teeth in an engaged mode. The driving rack is driven to move linearly to drive the transmission gear to rotate, and then the transmission gear is matched with the arc-shaped meshing teeth to drive the arc-shaped sliding block to rotate and slide on the sliding limiting seat, so that the arc-shaped core-pulling insert can stretch into or stretch out of a product cavity. Core pulling of the arc hole is achieved through mold opening force, an external oil cylinder is not needed, the manufacturing cost of the mold can be reduced, the injection molding period can be shortened, and therefore the machining efficiency of the mold is improved.

The utility model relates to the related field of defect detection equipment, in particular to a plastic mold injection molding surface defect detection device which comprises a device body, a detector is arranged in the device body, a conveying belt is arranged on the inner side of the detector in a penetrating mode, and a detection head is arranged in the detector and located above the conveying belt. A base is arranged at the lower end of the conveying belt, a first air cylinder is installed in the center of the base, a fixed plate is arranged at the upper end of the first air cylinder, a gear shaft is rotationally arranged at the upper end of the fixed plate, a movable plate is fixed to the upper end of the gear shaft, a rack rod is arranged on one side of the gear shaft, and a second air cylinder is connected to one end of the rack rod. Third air cylinders are arranged on the two sides of the conveying belt, and therefore lifting, clamping and overturning of the to-be-detected workpiece can be achieved, defect detection operation can be conveniently conducted on the bottom face of the workpiece, control over the rotating angle of the to-be-detected workpiece can be achieved, and it can be conveniently ensured that defect detection can be completely conducted on each face of the to-be-detected workpiece.

The invention discloses a stamping device for ferrous metal smelting and a stamping method of the stamping device, and relates to the technical field of stamping machining equipment.The stamping device comprises a bottom plate and side plates symmetrically fixed to the two sides of the top of the bottom plate, the top ends of the side plates are fixedly connected with a top plate, and the stamping device further comprises an adjusting assembly arranged in the middle of the bottom of the top plate; the adjusting assembly comprises a pressurizing air cylinder. The clamping assemblies are symmetrically arranged on the inner sides of the side plates, and each clamping assembly comprises a fixing sleeve and a connecting rod; one end of the connecting rod is fixedly connected with the fixing sleeve, the other end of the connecting rod is fixedly connected with a vertical rack, the middle of the inner side of the side plate is fixedly connected with a limiting sleeve, the vertical rack is slidably connected with the limiting sleeve, and the lower portion of the inner side of the side plate is rotatably connected with a lead screw. The problems that the extrusion force of the upper pressing plate is prone to being uneven in the stamping process, so that when the stamping speed is too high, stamped black metal is uneven in depth, deep or shallow, and the stamping efficiency and the qualified rate of products are affected are solved.

A folding frame and an outdoor table or outdoor chair using the folding frame. The folding frame comprises a base, a plurality of support legs hinged around the base, a plurality of extension support bars hinged on the support legs and capable of folding, and a locking mechanism. The base is provided with a plurality of gear racks. Both sides of each gear rack are configured with vertically distributed first teeth part. Both sides of the upper end of the support leg are configured with circularly distributed second teeth part. The upper end of the support leg is positioned between two gear racks, and the second teeth part of the support leg mesh with the first teeth part of the gear rack. When the locking mechanism can lock the unfolded support legs, the gear rack also locks the support legs.

An electronic device is provided. The electronic device includes a first housing, a second housing disposed to be slidable in a first direction relative to the first housing, and a display including a first region contacted with a surface of the second housing, a second region deformable according to movement of the second housing a guide member disposed on a surface of a rollable display to support at least portion of the rollable display, a motor disposed in the first housing and to provide driving force to the second housing, a pinion gear rotatably coupled to the motor, and a rack gear disposed in the second housing, engaged with the pinion gear, and movable according to a rotation of the pinion gear, wherein the first housing includes a frame cover accommodating the motor, the frame cover including a first periphery facing the first direction, a second periphery spaced apart from the first periphery and facing in a second direction opposite to the first direction, a third periphery perpendicular to the first periphery and accommodating the lack gear, and a fourth periphery parallel to the third periphery and opposite to the third periphery, wherein the motor is closer to the first periphery among the first periphery and the second periphery, and wherein the motor is spaced apart from a portion of the second region disposed in the second housing, when the display is viewed from above.