694results about How to "Smooth sliding" patented technology

The invention discloses a dexterous hand finger based on connecting rod transmission, a bionic mechanical arm and a humanoid robot, belongs to the field of bionic mechanical arms, solves the problem that a transmission mechanism of an existing dexterous hand is low in response speed, and adopts the technical scheme that the dexterous hand finger mainly comprises a finger base and a finger body, a driver and a transmission mechanism in transmission connection with the driver are arranged on the finger base, the driver drives the finger body to bend and / or swing through the transmission mechanism, the transmission mechanism comprises a guide piece and a sliding block installed on the guide piece in a sliding mode, and the sliding block is in transmission connection with the finger body. A traction rope connected with the sliding block is wound on an output shaft of the driver, the driver controls the output shaft to rotate forwards and backwards so as to drag the sliding block to slide back and forth along the guiding piece through the traction rope, and then the finger body is controlled to bend and / or swing. The finger is mainly used for driving the sliding block to move through the pulling rope so as to control the finger body to bend and swing, and the response efficiency of the finger body can be improved.

The invention discloses a device for polishing weld grooves of aluminum pipelines and containers in a module, which is characterized in that a horizontal clamping station and a vertical clamping station are arranged on a clamping platform, a lower rotating roller group is rotatably mounted on the clamping platform on the horizontal clamping station, a horizontal clamping support frame is fixedly mounted on the clamping platform, and a lower rotating roller group is rotatably mounted on the clamping platform on the vertical clamping station; an upper rotating roller set is installed on the horizontal clamping supporting frame in a lifting mode, and a clamping chuck is rotationally installed on the portion, located on the vertical clamping station, of the clamping platform. A grinding frame is fixedly installed on the grinding platform, a transverse driving sliding seat is installed on the grinding frame, a lifting driving sliding seat is installed on the transverse driving sliding seat in a sliding mode, a longitudinal driving sliding seat is installed on the lifting driving sliding seat in a sliding mode, and a connecting grinding rod is fixedly installed on the longitudinal driving sliding seat. An angle grinder is mounted at the free end of the connecting grinding rod through a sleeving structure; according to the polishing device, the pipeline can be clamped in the horizontal state and the vertical state at the same time, different polishing states are facilitated, meanwhile, the polishing position is adjusted, manual participation is reduced, and safety is improved.

The invention relates to the technical field of household appliances, and provides a door body assembly and refrigeration equipment. The door body assembly comprises a box door rotationally connected to a box body and suitable for opening or closing a storage space of the box body; the door plate is arranged on the outer side of the box door in a sliding manner; and the driving sliding door mechanism is arranged on the box door and is configured to drive the door plate to move relative to the width direction of the box door in the opening or closing process of the box door. According to the door body assembly, the driving sliding door mechanism is arranged on the box door, and the driving sliding door mechanism is connected with the box door and the door plate so as to drive the door plate to slide relative to the width direction of the box door in the rotating opening or closing process of the box door relative to the box body; the door plate can avoid obstacles such as walls and objects on the side face in the closing or opening process of the box door, the situation that rotation of the box door is affected due to interference between the door plate and the obstacles is avoided, and the use requirements of users in different scenes are met.

The invention relates to the technical field of household appliances, and provides a door body assembly and refrigeration equipment. The door body assembly comprises a box door rotationally connected to a box body and suitable for opening or closing a storage space of the box body; the door plate is arranged on the outer side of the box door in a sliding manner; the first driven guide rail mechanism and the sliding door mechanism are coaxially arranged, and the second driven guide rail mechanism and the sliding door mechanism are arranged in a non-coaxial mode; the sliding door mechanism is configured to drive the door plate to move relative to the width direction of the box door in the opening or closing process of the box door, and the first driven guide rail mechanism and the second driven guide rail mechanism are configured to cooperatively guide the door plate to move relative to the box door. According to the door body assembly, the sliding door mechanism is arranged on the box door, the sliding door mechanism can drive the door plate to slide relative to the box body under auxiliary cooperation of the first driven guide rail mechanism and the second driven guide rail mechanism, and therefore the door plate can avoid obstacles in the closing or opening process of the box door.

The utility model relates to a machine tool machining center sliding guide rail unloading device which comprises a guide rail body and an object placing plate, a sliding unloading mechanism is arranged in the object placing plate, a positioning dismounting assembly is arranged in the object placing plate, the sliding unloading mechanism comprises an object placing plate connected to the outer side of the guide rail body in a sliding mode, and the object placing plate is connected with the guide rail body in a sliding mode. And two buffer cavities are formed in the storage plate, and upper push plates are movably connected into the buffer cavities of the storage plate. According to the unloading device for the sliding guide rail of the machine tool machining center, pressure can be applied to the upper push plate through the arranged buffering assembly, so that the rollers in the mounting frame abut against the guide rail body, load buffering and unloading are achieved, and the influence of friction on sliding of the storage plate on the outer side of the guide rail body can be reduced through the arrangement of the rollers and the balls; and therefore, the service life of the storage plate and the guide rail body is prolonged while smooth sliding of the storage plate is guaranteed, use is convenient, and the practical effect of the device is effectively improved.

The utility model discloses a bed body frame of a seedling raising bed, which is used for placing hole trays for seedling raising and comprises a plurality of cross beam section bars, a plurality of supporting pipe columns and connecting rods, the cross beam section bars are arranged in parallel, the supporting pipe columns are also arranged below the cross beam section bars vertically, and the connecting rods are connected with the cross beam section bars. The adjacent supporting pipe columns are connected through the connecting rods. Each cross beam sectional material comprises a cross plate and a separation part, the separation part is vertically arranged on the upper surface of the cross plate, a sliding groove is formed by the separation part and the upper surface of the cross plate, and the hole tray is placed on the sliding groove of the adjacent cross beam sectional material and can slide in a reciprocating mode along the sliding groove. The hole tray is simple in structure, high in strength, high in precision, good in stability and capable of enabling the hole tray to slide smoothly in the sliding groove.

The invention relates to the technical field of household appliances, and provides a sliding door mechanism, a door body assembly and refrigeration equipment. The sliding door mechanism comprises a base, a first sliding block, a second sliding block and a connecting piece. The base is arranged on the box door, and a first guide rail and a second guide rail are formed on the two sides in the thickness direction of the box door respectively. The first sliding block is arranged on the first guide rail in a sliding mode and used for being in transmission connection with the box body. The second sliding block is arranged on the second guide rail in a sliding mode and used for being connected with the door plate. The two ends of the connecting piece are connected with the first sliding block and the second sliding block respectively. In the opening or closing process of the box door, the first sliding block moves on the first guide rail, and the first sliding block drives the second sliding block to move on the second guide rail in the opposite direction through the connecting piece so as to drive the door plate to move relative to the width direction of the box door. According to the sliding door mechanism, when the box door rotates, the two sliding blocks slide relatively to drive the door plate to slide relative to the box door, so that the door plate can avoid obstacles in the process that the box door rotates to be opened and closed.

The invention relates to the technical field of household appliances, and provides a door body assembly and refrigeration equipment. The door body assembly comprises a box door rotationally connected to the box body and suitable for opening or closing the storage space of the box body. And the door plate is arranged on the outer side of the box door in a sliding manner. The first driven sliding door mechanism and the driving sliding door mechanism are coaxially arranged on the box door, and the driving sliding door mechanism is configured in the mode that in the opening or closing process of the box door, the traction mechanism drives the driving sliding door mechanism, so that the driving sliding door mechanism drives the door plate to move relative to the width direction of the box door; the first driven sliding door mechanism is configured to cooperatively guide the door plate to move relative to the box door. According to the door body assembly, the driving sliding door mechanism is arranged on the box door, and the driving sliding door mechanism can drive the door plate to slide relative to the box body under the auxiliary cooperation of the first driven sliding door mechanism, so that the door plate can avoid obstacles in the closing or opening process of the box door.

The utility model relates to the technical field of breaking accessories, in particular to a breaking hammer damping rod which comprises a breaking hammer and a drill rod connected to the top of the breaking hammer, and a top sliding seat is installed in the drill rod in a sliding mode. The first groove and the second groove are formed in the drill rod, and the reset spring and the steel column are installed in the first groove and the second groove, so that an effective vibration reduction mechanism is formed. When the breaking hammer is impacted, the steel column can slide in the first groove, meanwhile, the reset spring is compressed, impact energy is absorbed through elastic deformation of the spring, and the damping effect is further enhanced through the arrangement of the hard spring. The top sliding seat is wound on the outer wall of the steel column in the second groove, and the top and the bottom of the top sliding seat are fixedly connected with the bottom of the second groove respectively. When the top sliding seat slides in the drill rod, the hard spring deforms, so that more impact energy is absorbed, and vibration transmitted to the breaking hammer is further reduced.

The invention relates to the technical field of automatic dumping type large-tonnage molten iron transfer trolleys, and discloses an automatic dumping type large-tonnage molten iron transfer trolley and a using method thereof.The automatic dumping type large-tonnage molten iron transfer trolley comprises a mounting base, a plurality of supporting columns are fixedly connected to the side wall of the mounting base, and a vertical frame is fixedly connected to the positions over the supporting columns. According to the pouring device, the moving column drives the sliding block to move towards the end close to the pouring shaft along the groove, in addition, the moving column can also drive the vertical rod to move towards the end close to the pouring shaft, and the vertical rod moves to drive the first sliding block to move towards the end close to the pouring shaft along the second sliding groove; a first sliding block moves to drive a locking column on a first pushing plate to move towards one end close to a dumping shaft, and at the moment, the locking column is locked in a groove in a supporting arm, so that the dumping shaft on the ladle cannot be separated from the supporting arm when the ladle dumps molten iron, and the risk that the ladle is separated is reduced; and the safety performance of the device is improved.

The clamping mechanism comprises a chuck body and four sets of air cylinders evenly arranged in the circumferential direction, and piston rods of the air cylinders are arranged in the radial direction of the chuck and fixedly installed at the front end of the chuck body. A clamping jaw assembly is fixedly installed on the cylinder body, an organ protective cover is connected between the cylinder body and the end of the piston rod, two synchronous gear rings are coaxially arranged at the rear end of the chuck body, and the cylinder bodies of the two adjacent air cylinders are in transmission connection with the two synchronous gear rings correspondingly. And therefore, the two groups of symmetrically arranged air cylinders synchronously act through the same synchronous gear ring. According to the embodiment, the power source is externally arranged, the internal space of the chuck is saved, meanwhile, later maintenance is facilitated, the power source is directly connected with the clamping execution end, transmission loss is avoided, larger clamping force is achieved, meanwhile, a sliding block structure is avoided, and the phenomenon of sliding clamping stagnation is eradicated.

The invention relates to the technical field of surgical aspirators, and discloses a neurosurgical aspirator which comprises an aspiration body and further comprises a shell, the aspiration body is arranged in the shell, a positioning assembly is arranged between the aspiration body and the shell, a plurality of sliding grooves are formed in the shell in a penetrating mode, and the positioning assembly comprises a positioning ring, a locking ring, a connecting ring and a plurality of connecting rods. The connecting rods are arranged in the sliding grooves respectively, the locking ring is in threaded connection with the outer wall of the shell, the positioning ring is arranged at the ends, close to the locking ring, of the connecting rods, the connecting ring is arranged at the ends, away from the locking ring, of the connecting rods, and the attraction body is located in the connecting ring. By forming the sliding groove in the shell, the connecting rod is slidably installed in the sliding groove, the position of the connecting rod in the sliding groove is adjusted through the connecting ring, then the length of the positioning ring and the length of the suction body are controlled, a doctor can suck wounds with different depths conveniently, and meanwhile the positioning ring is matched to prevent the suction body from making direct contact with nervous tissue; and secondary injury in the operation process is prevented.

The invention relates to the technical field of household appliances, and provides a sliding door mechanism, a door body assembly and refrigeration equipment, and the sliding door mechanism comprises a traction part, a first base, a first sliding block, a second sliding block and a flexible cable. A first guide rail is formed on one side of the first base, and a second guide rail is formed on the other side. The first sliding block is arranged on the first guide rail in a sliding mode, and the second sliding block is arranged on the second guide rail in a sliding mode. The two ends of the flexible rope are connected with the first sliding block and the second sliding block respectively. Under the condition that the first sliding block moves on the first guide rail, the first sliding block drives the second sliding block to move on the second guide rail in the opposite direction through the flexible cable. According to the sliding door mechanism, the first guide rail and the second guide rail are arranged on the two sides of the first base, and the first sliding block and the second sliding block are slidably arranged on the first guide rail and the second guide rail correspondingly, so that when the box door rotates, the two sliding blocks slide relatively and the sliding directions are opposite; therefore, the door plate can avoid obstacles on the two sides in the rotating opening and closing process of the box door.

The utility model discloses an end telescopic airing structure, an airing assembly and a clothes airing machine, and belongs to the field of clothes hangers. The end telescopic airing structure comprises two fixing rods arranged in parallel and telescopic rods arranged at the ends of the fixing rods, the two ends of the two fixing rods are connected through fixing rod bases, and the extending ends of the telescopic rods located on the same side are connected through telescopic rod bases. And a flexible sheet which can be unfolded along with the extension of the telescopic rod is arranged between the fixed rod seat and the telescopic rod seat on the same side. According to the utility model, the cross rod between the telescopic rods is driven by the flexible sheet to be linked with the extension action of the telescopic rods, a complicated linkage structure does not need to be designed in the telescopic rods, the structure is simple, and the manufacturing cost is low; after the flexible sheets are unfolded, an airing platform can be formed, the span of the unfolded flexible sheets can be reduced through the transverse rods, the supporting effect on the flexible sheets is achieved, and the airing bearing capacity of the flexible sheets can be improved; and the cross rod can be used as a mother and baby rod to clamp and hang small clothes, so that the clothes airing machine has various small clothes airing modes, and the practicability of the clothes airing machine is further improved.

The invention relates to the field of automobile wire harnesses, and mainly discloses an automobile wire harness processing conveying device which comprises a bottom frame, an adjusting frame is mounted at the top of the bottom frame, a rotating frame is mounted at the top of the adjusting frame, the bottom frame comprises a bottom frame, supporting legs are fixedly mounted on the four portions of the bottom frame, and first sliding rails are symmetrically mounted at the top of the bottom frame along the center; the bottom of the adjusting frame is slidably mounted on the first sliding rail. The adjusting frame can be slidably adjusted at the top of the bottom frame, the adjusting frame can drive a third transmission chain to move through an installed second motor, and the rotating frame can slide on a second sliding rail through the third transmission chain, so that the rotating frame can rotate on the top of the bottom frame on the premise that the length of the bottom frame is not changed. And the overall adjusting stroke of the rotating frame is increased, the overall practicability is improved, and the feeding position and the discharging position can be changed according to actual needs when wiring harnesses are conveyed.

The utility model discloses a bridge expansion joint displacement detection device and detection system, and the device comprises a detection rod and a protection sleeve with one end provided with an opening. One end of the detection rod is inserted into the protective sleeve in a sliding and sealing manner, a laser displacement sensor is fixedly mounted at the end, located in the protective sleeve, of the detection rod, and a reflection part right opposite to the laser displacement sensor is arranged in the protective sleeve; the end, away from the detection rod, of the protection sleeve is fixedly sleeved with a sleeve in a sealed mode, a first cavity is formed between the sleeve and the protection sleeve, a first through hole communicated with the first cavity is formed in the sleeve, and a second through hole communicated with the first cavity is formed in the protection sleeve. According to the utility model, the bridge expansion joint can be detected in real time, and the detection efficiency and precision are improved.

The utility model relates to the technical field of aluminum die machining, and particularly discloses a plate shearing machine which comprises a workbench and a shearing mechanism, the top of the workbench is fixedly connected with a supporting frame, the shearing mechanism is installed in the supporting frame, the top of the workbench is connected with two sets of fixing plates in a sliding mode, and the fixing plates are located on one side of a feeding port of the supporting frame. The top of the workbench is slidably connected with two sets of limiting plates, and the limiting plates are located on one side of a discharging port of the supporting frame. The fixed plate, the movable plate, the guide block and the sliding assembly are arranged, the sliding assembly starts to work, the fixed plate and the movable plate are driven by the guide block to move at the same time, the two ends of a plate are clamped and fixed, and therefore the plate can be clamped and fixed; and the situation that the production quality is reduced due to incomplete shearing or errors caused by shaking of the plate in the shearing process is reduced.

The invention discloses an automatic and manual safety switching device of a valve actuating mechanism, which comprises a shell, a main shaft is rotatably arranged in the shell, an automatic clamping piece, a manual clamping piece and a controller are arranged on the outer wall of the shell, and a trigger switch electrically connected with the controller is arranged on the manual clamping piece; the automatic driving mechanism is used for automatically driving the main shaft to rotate, and the automatic driving mechanism is electrically connected with the controller; a rotating boss rotatable together with the main shaft; the manual driving mechanism can be combined with or separated from the rotating shaft sleeve; the switching handle assembly is used for pushing the rotating shaft sleeve to move towards the manual driving mechanism so that the rotating shaft sleeve can be combined with the manual driving mechanism to achieve a manual driving mode of the main shaft, or pushing the rotating shaft sleeve to be away from the manual driving mechanism so that the rotating shaft sleeve can be separated from the manual driving mechanism to achieve an automatic driving mode of the main shaft. The device can realize safe, simple and efficient switching between automatic operation and manual operation.

The underground conveying monitor for intelligent mining comprises a conveying belt body, sliding grooves are formed in the front surface and the rear surface of the conveying belt body, and a set of electric push rods are fixed to the front side and the rear side of the conveying belt body; the conveying belt is characterized in that the output end of the electric push rod is fixed to one side of the supporting moving roller, a set of water tanks are mounted at the top of the mounting block, and a monitoring body for monitoring materials at the top of the conveying belt body is mounted at the bottom of the mounting block. According to the under-mine conveying monitor for intelligent mining, an elastic air bag is arranged, the outer side of the elastic air bag is extruded through an extrusion mechanism, a water source at the lower end of a water spraying pipe can be extruded through gas, water spraying treatment can be conducted on the water source through the water spraying pipe, and the water source can conduct water spraying treatment on the bottom position of the monitoring body; and dust on the surface of the monitoring body can be cleaned through a water source.

The utility model relates to the technical field of numerical control drilling and milling machines, in particular to a gantry numerical control drilling and milling machine convenient to clean. A platform is arranged in the middle of the gantry numerical control drilling and milling machine body, servo sliding table modules are arranged on the two sides of the platform, and an adsorption mechanism is arranged between the servo sliding table modules. And the sealing box is arranged outside one side of the gantry numerical control drilling and milling machine body, and a negative pressure pump is fixedly installed at the top end of the sealing box. The movable frame, the adsorption opening, the sealing box, the negative pressure pump and the filter screen are used in cooperation, after a workpiece is taken out of the platform, the negative pressure pump and the servo sliding table module are started at the same time, and after the servo sliding table module is started, the movable frame is controlled to move transversely and horizontally; and an adsorption opening in the bottom end of the movable frame is driven to suck metal chippings on the surface of the platform in a negative pressure mode, then the metal chippings are fed into a sealing box, in this way, during cleaning, waste chippings cannot be left, and the cleaning effect is more thorough.

The utility model discloses a telescopic anti-overturning automobile safety seat base. The telescopic anti-overturning automobile safety seat base comprises a base body, the anti-overturning assembly is arranged on the base body and can be adjusted in a telescopic and sliding mode in the front-back direction of the base body, and the anti-overturning assembly is configured to be used for being attached to the backrest side of the automobile seat in an abutting mode so as to achieve overturning resistance; the telescopic length of the anti-overturning assembly relative to the base body is controlled and adjusted through the telescopic sliding of the anti-overturning assembly relative to the base body, that is, the anti-overturning assembly can be correspondingly adjusted in a telescopic mode according to automobile seats of different sizes so as to ensure that the anti-overturning assembly can abut against and be attached to the backrest sides of the automobile seats of different sizes. Therefore, by the adoption of the automobile seat, the requirement for installation, attachment and overturning resistance of different automobile seats can be met, and meanwhile the problem that legs of children bend unnaturally when the automobile seat is installed and used backwards can be solved.

The invention relates to the technical field of vacuum glass, in particular to a vacuum glass supporting column adjustable arrangement device which comprises a workbench, a working groove is formed in the upper end of the workbench, and a vertical plate is arranged on one side of the workbench; the bearing module is arranged in the working groove, and the bearing module is used for supporting the vacuum glass for processing; and the arrangement assembly is arranged in the workbench and comprises a transverse adjusting module and a longitudinal adjusting module, the transverse adjusting module can drive the longitudinal adjusting module to conduct adjustment in the transverse direction, the supporting columns are arranged on the longitudinal adjusting module, and the longitudinal adjusting module is used for adjusting the longitudinal distance between the supporting columns. Compared with the prior art, the arrangement assembly is arranged, so that flexibility and accuracy are achieved, personal errors are reduced, the working efficiency and the overall consistency of arrangement of the supporting columns are improved, and a stable and reliable foundation is provided for subsequent pressing of the vacuum glass.

The utility model relates to the technical field of environmental sanitation cleaning and sweeping vehicles, in particular to a detachable flushing device for an environmental sanitation cleaning and sweeping vehicle, which comprises a support frame and two groups of fixing plates, a fixing pipe is mounted in the support frame, a plurality of groups of spraying pipes are arranged at the bottom of the fixing pipe, and a water inlet of the fixing pipe is communicated with a water outlet of a connecting pipe. By arranging the two sets of fixing plates, the moving blocks, the connecting rods, the sliding blocks, the positioning assemblies and the adjusting assemblies, the adjusting assemblies can adjust the two sets of moving blocks to be far away from each other to drive the sliding blocks to move in the sliding grooves, and after the moving blocks are adjusted to the proper positions, the sliding blocks can move in the sliding grooves, so that the sliding blocks can move in the sliding grooves. The positioning assembly positions the sliding block, so that the height of the fixing pipe is adjusted, the height of the fixing pipe can be adjusted according to the heights of different vehicle types, and unnecessary impact on the road surface is reduced.

The forming device comprises a first rotating disc, lower punching die heads capable of sliding up and down are arranged on the first rotating disc in a circumferential array mode, a convex disc with a lower opening is arranged below the first rotating disc, the convex disc with the lower opening is in an unclosed notch ring shape, and a second rotating disc is arranged above the first rotating disc. Upper punching die heads capable of sliding up and down are arranged on the second rotating disc in a circumferential array mode, a top protruding disc is arranged above the second rotating disc, and the upper ends of the upper punching die heads make sliding contact with the lower wall of the top protruding disc; the lower end of the lower punching die head is in sliding contact with the annular upper wall defined by the lower opening convex disc and the vibration ladder block. The vibration ladder block can drive the lower punching die head to vibrate in a reciprocating mode, so that materials in the lower punching die head are denser, bubbles in powder in the lower punching die head are promoted to be separated, and the weight difference between tablets is reduced.

The invention belongs to the technical field of photography and camera shooting, and discloses a ball closed-loop motor which comprises a support, a carrier and a driving mechanism. A lens is arranged on the bracket; an optical filter is arranged on the carrier, and a guide component I and a guide component II are arranged between the carrier and the bracket, so that the carrier can slide relative to the bracket along an optical axis; the driving mechanism is used for driving the carrier to move relative to the bracket; the first guide component and the second guide component are adjacently arranged, the first guide component comprises at least two first balls, the second guide component comprises second balls, and in the plane where the first balls and the second balls are located, the first balls and the second balls form a triangular structure. The first ball and the second ball are of a triangular structure in the same plane, so that the use stability of the motor is improved, and the definition of a shot picture is ensured. The invention further discloses a camera module with the ball closed-loop motor and electronic equipment with the camera module.

The invention relates to the technical field of household appliances, and provides a door body assembly and refrigeration equipment. The door body assembly is applied to the refrigeration equipment. The door body assembly comprises a box door which is rotationally connected to the box body, suitable for opening or closing the storage space of the box body and located in the installation space and used for being arranged on the inner side of the door plate. The driving sliding door mechanism is arranged on the box door, the driving sliding door mechanism is connected with the box body through the traction mechanism, and in the opening or closing process of the box door, the box body drives the driving sliding door mechanism through the traction mechanism, so that the driving sliding door mechanism drives the door plate to slide relative to the width direction of the box door. According to the door body assembly, the driving sliding door mechanism is arranged on the box door, the driving sliding door mechanism is connected with the box door and the door plate so as to drive the door plate to slide relative to the width direction of the box door in the process that the box door rotates to be opened or closed relative to the box body, and therefore the door plate can avoid obstacles on the side face in the process that the box door is closed or opened.

The invention relates to the technical field of material conveying, and particularly discloses a material conveying device which comprises a machine body, a push plate feeding mechanism, a conveying mechanism and a screening mechanism, the machine body is slidably connected with a material containing plate in the left-right direction, a first driving part for driving the material containing plate to move left and right is arranged on the machine body, and the material containing plate is obliquely arranged; the material screening mechanism comprises a pushing block and a material guiding ramp corresponding to the pushing block in position, the pushing block is fixedly connected with the machine body and located above the conveying mechanism, the material guiding ramp is fixedly connected with the machine body and extends to the position above the material containing plate, and a height limiting plate is arranged on the machine body. A feeding space allowing blocky materials to pass through is formed between the bottom of the height limiting plate and the top of the material containing plate. According to the material conveying device, materials stacked on the material containing plate can be evenly spread, the feeding efficiency is improved, and the situation that the materials stacked together are lifted, and invalid feeding is caused can be avoided.

The utility model discloses punching and positioning equipment for constructional engineering. The punching and positioning equipment comprises a mounting frame, a fixed positioning plate and positioning holes. Through the arrangement of the movable positioning plate, the scale marks, the sliding assembly and the locking assembly, an operator can conduct punching according to the positioning holes in the fixed positioning plate, and when a hole needs to be punched after the first hole is punched, the operator pushes the movable positioning plate to move to the next punching position through the sliding assembly according to the scale marks; and the situation that a movable positioning plate shakes in the punching process can be prevented through a locking assembly, and the problem that in the actual use process, multiple holes are usually punched in the punching process, and when an existing positioning device needs to punch one hole after punching one hole, in order to guarantee that the distance between two holes meets the installation size, the positioning device is not convenient to use is solved. And the positioning is carried out by measuring, marking lines and marking points, and the mode is too troublesome and the working efficiency is reduced.

The invention relates to the technical field of household appliances, and provides a sliding door mechanism, a door body assembly and refrigeration equipment. The sliding door mechanism comprises a base, a first sliding block, a second sliding block and a connecting piece. The base is arranged on the box door, and a first guide rail and a second guide rail are formed on the two sides in the height direction of the box door respectively. The first sliding block is arranged on the first guide rail in a sliding mode and used for being in transmission connection with the box body. The second sliding block is arranged on the second guide rail in a sliding mode and used for being connected with the door plate. The two ends of the connecting piece are connected with the first sliding block and the second sliding block respectively. In the opening or closing process of the box door, the first sliding block moves on the first guide rail, and the first sliding block drives the second sliding block to move on the second guide rail in the opposite direction through the connecting piece so as to drive the door plate to move relative to the width direction of the box door. According to the sliding door mechanism, when the box door rotates, the two sliding blocks slide relatively to drive the door plate to slide relative to the box door, so that the door plate can avoid obstacles on the two sides in the rotating opening and closing process of the box door.