187results about How to "Guaranteed rigidity" patented technology

The invention relates to the technical field of metal casting, in particular to a well lid casting rapid demolding device which comprises a casting body, a demolding assembly is arranged in an inner cavity of the casting body, a lower mold cavity is formed in the upper surface of the casting body, a hydraulic cylinder is fixedly installed on the inner wall of the casting body, and a piston rod is slidably connected to an inner cavity of the hydraulic cylinder. Automatic demolding is achieved through the demolding assembly, the demolding mechanism ejects a workpiece through flexible force, the situation that the workpiece or a mold is damaged due to ejection of the demolding mechanism with too high rigidity or manual beating or jolting demolding is prevented, meanwhile, the ejection height of the workpiece during demolding can be adjusted, and in addition, whether the workpiece is evenly stressed or not during demolding can be detected; the appearance attractiveness of the outer surface of the well lid is guaranteed, deformation is prevented, the durability and the bearing capacity of the well lid are improved, the discharging mode can be switched through the discharging assembly, quantitative discharging is adopted when casting of raw materials is about to be finished, and the proper amount of the casting raw materials is guaranteed.

The invention discloses a triazine biphenyl compound, a composition, a cured product as well as a preparation method and application of the triazine biphenyl compound, the composition and the cured product. The compound is phenolic resin with a triazine biphenyl structure obtained through condensation polymerization of p-cyanobiphenol; the phenolic resin respectively reacts with an epichlorohydrin compound and an acyl chloride compound to obtain epoxy resin and active ester with a triazine biphenyl structure, and the epoxy resin and the active ester can be self-cured or cured under the action of an imidazole accelerator; in the preparation process, triazine ring (containing nitrogen) is introduced as a node, trifunctional epoxy resin with a rigid aromatic structure as an arm and an active ester curing agent (the same skeleton) are prepared into a thermosetting cross-linked network by adopting a non-polar cross-linking scheme, and a three-dimensional network intrinsic microporous structure is formed through in-situ cross-linking regulation and control of a rigid long-arm branched unit. Further, the bottlenecks of low dielectric property, high temperature resistance, flame retardance and the like are broken through, and the cured material has the characteristics of excellent flame retardance, high temperature resistance and low dielectric property.

The invention belongs to the technical field of modification of ultra-high molecular weight polyethylene, and particularly relates to special resin for a modified ultra-high molecular weight polyethylene lining oil pipe and a preparation method of the special resin. The special resin for the modified ultra-high molecular weight polyethylene lining oil pipe is prepared from the following raw materials in parts by mass: 65 to 80 parts of ultra-high molecular weight polyethylene, 5 to 10 parts of high-density polyethylene, 8 to 12 parts of modified polyaryletherketone, 4 to 7 parts of modified hyperbranched polyester, 0.3 to 2 parts of silicone master batch and 0.1 to 0.5 part of antioxidant. The lining oil pipe prepared from the special resin for the modified ultra-high molecular weight polyethylene lining oil pipe has excellent wear resistance and high temperature resistance, and also has good mechanical properties such as tensile strength and impact strength.

The utility model provides a concrete filled steel tube flat cylindrical surface outer beam reinforcing node, the outer contour of the section of a concrete filled steel tube flat column is rectangular, a longitudinal insertion plate is arranged between the middle parts of short edges in the column along the full height, and brackets are arranged at the rear part of a left outer cylindrical surface and the front part of a right outer cylindrical surface according to the same structural form; transverse reinforcing plates are respectively arranged in the left area and the right area corresponding to the joint with the bracket; sealing plates and transverse stiffening ribs are arranged on the portions, on the two sides of a bracket connecting web plate, of the end, connected with the concrete-filled steel tube flat column, of the bracket according to the same structural form, and haunched upper flange plates and underarm flange plates are welded to the portions, between the sealing plates and the outer cylindrical surface of the concrete-filled steel tube flat column, of the upper end of a bracket upper flange and the lower end of a bracket lower flange respectively. The haunching upper flange plate and the haunching underarm flange plate are vertically symmetrical, and plate bodies are inclined and are as wide as the bracket. The utility model solves the problem of column exposure of a high-rise steel structure building structure and the problem of insufficient out-of-plane connection rigidity of a flat column system, and is convenient to construct.

The invention relates to the technical field of wafer processing, and discloses a wafer thinning device.A Z-axis moving assembly comprises a main shaft mounting frame, and the main shaft mounting frame is arranged on an upper lathe bed support in a sliding mode through three Z-axis sliding tables matched with three Z-axis guide rails; the grinding main shaft assembly is arranged on the Z-axis moving assembly and located in the center of a triangle formed by the three Z-axis guide rails. A Z-axis driving assembly used for driving the main shaft mounting frame to move in the Z-axis direction is arranged on the upper lathe bed support. According to the invention, the Z-axis moving assembly adopts three Z-axis guide rails for positioning and guiding, so that the movement in the Z-axis direction is stable, and the grinding quality of a thinning grinding wheel on a wafer is improved; the center of the turntable is concentric with the center of the lead screw, deflection influence is reduced, grinding is uniform, and rigidity is good; and meanwhile, three-point leveling is selected for the planeness of the thinning main shaft, the planeness of the thinning main shaft can be conveniently, rapidly and efficiently adjusted, and the subsequent machining quality is guaranteed.

The invention discloses a circular saw blade base body provided with a vibration reduction inner cavity and a method, solves the problem that the rigidity of a saw blade is reduced due to the arrangement of a vibration reduction groove of the saw blade in the prior art, and has the beneficial effects of effectively absorbing vibration and improving the rigidity of the saw blade. Comprising a first saw blade body and a second saw blade body, the inner side face of the first saw blade body is connected with the inner side face of the second saw blade body, and a damping groove is formed in the inner side face of at least one of the first saw blade body and the second saw blade body so that a circular saw blade base body can be provided with a damping inner cavity; the depth of the vibration reduction grooves is smaller than the thickness of the first saw blade body or the second saw blade body, and when the first saw blade body and the second saw blade body are provided with the vibration reduction grooves, the shapes of the vibration reduction grooves are the same or different, and the arrangement modes of the vibration reduction grooves are the same or different. The first saw blade body and the second saw blade body are both provided with vibration reduction grooves, and when the first saw blade body and the second saw blade body are in butt joint, the vibration reduction grooves are arranged in a staggered mode.

The invention discloses a quick-change turning clamping mechanism for a special-shaped piston rod with a lug ring, relates to the technical field of clamping tools, and aims to solve the problems that in the prior art, a rod head of the special-shaped integral piston rod with the lug ring cannot be directly clamped through a three-jaw self-centering chuck and needs to be clamped through a four-jaw chuck, precision is poor, efficiency is low and the like. One side of the base body is connected with three-jaw self-centering chuck equipment, and a clamping assembly is arranged on the other side of the base body and used for clamping the special-shaped piston rod with the lug ring. A replaceable tip is arranged in the middle of the base body, a center hole is formed in the middle of a lug ring of the special-shaped piston rod with the lug ring, and the replaceable tip can be embedded in the center hole so that the central axis of the three-jaw self-centering chuck equipment and the central axis of the special-shaped piston rod with the lug ring can be located on the same straight line. The special-shaped piston rod with the lug ring can be directly clamped by existing standard three-jaw self-centering chuck equipment, the applicability is high, and the production efficiency is improved.

The utility model discloses a pipeline external aligning device which comprises two semicircular pressing rings which are connected end to end, a connecting block is fixedly arranged between the pressing rings, and each pressing ring comprises first annular plate assemblies arranged at the two ends and a plurality of second annular plate assemblies arranged between the first annular plate assemblies. The first annular plate assemblies and the second annular plate assemblies are fixedly connected through bridge plates, and the second annular plate assemblies are fixedly connected through bridge plates. The external aligning device for the pipeline is made of titanium alloy materials, the whole device is light in weight and reasonable in structure, rigidity can be better guaranteed, the product structure is simple, installation is rapid and convenient, and the problems that in the construction process, an internal aligning device is required to automatically walk in the pipeline, pneumatic aligning is adopted, the structure is complex, and construction cost is high are solved.

The invention discloses a polar plate for a water electrolysis hydrogen production electrolytic bath and the electrolytic bath, and belongs to the field of water electrolysis hydrogen production. Comprising a circular pole frame and a main pole plate, a plurality of liquid inlets are formed in the bottom of the pole frame, a plurality of liquid outlets are formed in the top of the pole frame, a plurality of main reinforcing ribs with different lengths are arranged on the main pole plate in the circumferential direction, and first flow channels distributed in the circumferential direction and second flow channels distributed in the non-circumferential direction are formed in the main pole plate through the main reinforcing ribs; and the straight line of the second runners at the left lower part and the right lower part of the main polar plate does not pass through the circle center of the main polar plate. And the width of the main reinforcing rib is the same as that of the first runner. And the main reinforcing ribs on the two side surfaces of the main polar plate are opposite to the first flow channels in position. The multiple main reinforcing ribs are distributed in a bilateral symmetry mode with the second flow channel in the vertical direction as the axis. According to the polar plate for the electrolytic cell for producing hydrogen by electrolyzing water and the electrolytic cell, the effects of uniform flow channels, low processing cost and low energy consumption can be achieved.

The invention relates to intrinsic flame-retardant bio-based epoxy resin and a synthesis method thereof.The intrinsic flame-retardant bio-based epoxy resin takes magnolol as a main raw material, and the molecular structure contains biphenyl units and ester bonds, so that the intrinsic flame-retardant bio-based epoxy resin has excellent flame retardance and thermal performance. The synthesis method comprises the following three steps: firstly, reacting magnolol with halogenated alkane to generate a precursor; secondly, reacting the precursor with acyl chloride to generate an intermediate; finally, oxidizing the intermediate to generate the target epoxy resin. The method does not need to add a large amount of flame retardant, and avoids negative influence on the performance of the epoxy resin. The synthesized epoxy resin shows excellent flame retardance and heat resistance, has high carbon residue rate, glass transition temperature and thermal decomposition temperature, and has the flame retardant level reaching V-0 level which is superior to that of general epoxy resin.

An imaging device includes: an imaging section; a first metal side plate and a second metal side plate; an antenna; and a housing having an outlet thereon, wherein the housing includes a top cover disposed at a position higher than the first metal side plate in the vertical direction, wherein in a region downstream of the antenna along the discharge direction of recording material discharged from the outlet, the upper end of the first metal side plate is located at a position lower than the antenna in the vertical direction, and a resin support portion connected to the first metal side plate is disposed in the region such that the resin support portion supports the top cover, wherein the antenna and the resin support portion are disposed along the upper end of the first metal side plate.

The invention relates to a high-impact PC-elastomer composite battery shell and a preparation method thereof, and belongs to the technical field of battery shell manufacturing. The shell adopts a three-layer composite structure design and comprises an outer polycarbonate layer of which the end group is grafted with a hindered amine light stabilizer, a middle thermoplastic polyurethane layer containing a double-crosslinking network and an inner glass fiber reinforced polycarbonate layer. Through material modification, uniform distribution and dense combination of all layers of materials are realized, the impact resistance and the weather resistance of the battery shell are remarkably improved, and the excellent bonding property of an interface is ensured.

This utility model discloses an integrated transition yaw connection system for wind turbines, belonging to the technical field of wind power generation equipment. The system includes a wind turbine tower, a slewing bearing, a short-section cylinder, and a lower platform. The wind turbine tower has a truss-type hollow structure. The short-section cylinder is vertically arranged and its top is welded to the lower platform as a whole. Its bottom is connected to the top of the tower through the slewing bearing. This utility model uses a hierarchical structure of truss tower-slewing bearing-short-section cylinder-platform. It utilizes the short-section cylinder to distribute the nacelle load and compensate for installation errors. Combined with the slewing bearing, it achieves low-friction and stable yaw. This structure effectively solves the problems of heavy self-weight, obvious yaw vibration, complex assembly, and easy wear of connection parts of traditional wind turbine towers. It has the advantages of lightweight, stable yaw, convenient installation, and long service life.

The invention relates to the technical field of automobile body-in-white welding and manufacturing, and discloses a flexible positioning method of a middle and rear floor clamp and a hardware system thereof, and the hardware system comprises a clamp base, a flexible positioning mechanism switched through an electric cylinder and a flexible positioning mechanism switched through a gun changing disc. The flexible positioning method comprises the steps that firstly, the master control PLC unit analyzes a vehicle type code instruction, and the number of the target separable module, the left side target position and the right side target position are determined; the first servo electric cylinder and the second servo electric cylinder drive the movable positioning module to move independently. The carrying robot assembles the separable module on the clamp base, and the base butt joint structure achieves positioning through cooperation of a first base side positioning pin and a first module side positioning bush. The locking and maintaining system utilizes a pneumatic clamping unit to lock the separable module, and the robot side main disc and the tool side gun changing disc achieve automatic energy butt joint. According to the invention, the problems of low positioning switching efficiency and poor precision in multi-vehicle mixed-line production are solved.

The utility model discloses a kind of lining blanking machine for square tube lining plate welding, belong to welding auxiliary equipment technical field, the blanking machine mainly includes storage rack and push mechanism, storage rack is formed by first carriage, second carriage and the connecting end plate of both ends, form a slightly wider lining blanking passage, for horizontal stacking lining plate, push mechanism is fixed in storage rack bottom end side, its execution end is aligned with the lowermost lining plate of blanking passage, by cylinder driving connecting rod and L type poking piece mechanism, the lowermost lining plate is horizontally pushed out;Upper lining plate is automatically dropped to supplement under the action of gravity in succession, the utility model realizes the automatic, continuous, accurate blanking of lining plate, effectively improve the automation degree and production efficiency of square tube lining plate welding, reduce manual operation intensity and security risk.

The efficient lettering and chamfering multipurpose cutter comprises a front end R bottom blade, a chamfering blade, an outer circumferential blade and a cutter handle, the front end R bottom blade is arranged at the end of the cutter handle, the chamfering blade and the outer circumferential blade are integrally machined between the front end R bottom blade and the cutter handle, a double-tooth-space groove is formed in the chamfering portion of the chamfering blade, and the outer circumferential blade is arranged in the double-tooth-space groove. A spiral cutter groove is formed along the outer circumferential blade; by means of the front end R bottom blade and the double-backlash-groove slotting structure arranged on the chamfering blade, the problems of easy chipping and chip containing space in lettering are effectively solved, the chip removal space and rigidity of the cutter are guaranteed, the outer circumferential blade is provided with the spiral cutter groove, chip removal can be effectively guided, and the service life of the cutter is prolonged. The phenomena of tool nose breakage and tool breakage are prevented, the machining cost is reduced, the machining time is shortened, and therefore the machining efficiency is improved.

A caliper body of a disc brake for a vehicle, which suppresses an increase in weight while achieving an increase in rigidity by reinforcing ribs, wherein a pair of first reinforcing ribs 28, 28 extending from a cylinder portion side to a disc rotor run-out side are provided on a disc radius direction outer side and a disc radius direction inner side of a disc rotor opposite side face 21h of a run-out side body portion 21g of the caliper body 3. A pair of second reinforcing ribs 29, 29 extending from the cylinder portion side to a disc rotor run-in side are provided on a disc radius direction outer side and a disc radius direction inner side of the disc rotor opposite side face 21h of a run-in side body portion 21j. A first thinning portion 21i serving as a thin-walled portion is provided on the disc rotor opposite side face 21h between the pair of first reinforcing ribs 28, 28, and a second thinning portion 21k serving as a thin-walled portion is provided on the disc rotor opposite side face 21h between the pair of second reinforcing ribs 29, 29.

An electronic device according to one embodiment disclosed in this document includes: a housing including a conductive portion including a first segment and a second segment separated from the first segment by a first gap; a first switch configured to selectively connect the first segment and the second segment; a first wireless communication circuit comprising a first port and a second port, the first port being electrically connected to the first segment; and a second switch configured to selectively connect the second port and the second segment, in which the first wireless communication circuit is configured to operate in a first mode or a second mode. The first mode is configured to transmit and / or receive wireless signals in a first frequency range by using a first antenna formed by a first segment electrically open to a second segment through a first switch, and transmit and / or receive wireless signals in the first frequency range by using a second antenna formed by a second segment electrically open to the first segment through the first switch and electrically connected to the second port through the second switch. The second mode is configured to transmit and / or receive wireless signals in the first frequency range and the second frequency range by using a third antenna formed by a first segment electrically connected to the second segment through the first switch and a second segment electrically open to the second port through the second switch. The second frequency range may be different than the first frequency range.

The utility model discloses a kind of lithium battery pole piece size measuring devices, it relates to lithium battery pole piece online measurement technical field, the lithium battery pole piece size measuring device, including table top and display, the table top is fixedly provided with support, the upper end of support is equipped with the measuring mechanism for carrying out size measurement to lithium battery pole piece, the lower end of support is provided with fixed base, fixed base inside is equipped with the object table for carrying the lithium battery pole piece to be measured, the upper end of fixed base is also provided with adjustable light source mechanism, adjustable light source mechanism adjusts illumination position according to different measurement needs.The utility model constructs multi-mode lighting system by integrating liftable rotating annular light source, adjustable arc-shaped light supplement unit and reversible locking side light source, realize all-around, self-adapting illumination adjustment to lithium battery pole piece, effectively eliminate reflection and shadow, significantly improve the accuracy and adaptability of size measurement.

The utility model discloses a miniaturized high moment has brush motor, this motor aims at solving the inductance element and carbon brush assembly and terminal of existing motor inside adopt direct welding mode, cannot keep reliable contact in the problem of vibration environment. The motor includes the shell, the stator subassembly of fixed mounting in the shell inside, the rotor subassembly of rotation installation in the shell inside and with the terminal subassembly of rotor subassembly electricity is connected, and the terminal subassembly includes the middle plate, installs the inductance in the middle plate, carbon brush assembly and conducting terminal, and one end of inductance is fixed after welding with the conducting terminal riveting, and the other end of inductance is fixed after welding with carbon brush assembly riveting. The utility model passes through independent riveting welding inductance both ends, realizes inductance and brush arm, inductance and the high strength mechanical locking and conducting connection of conducting terminal, and the anti -vibration performance is superior to direct welding mode, can keep reliable contact in the vibration environment.

The invention relates to the technical field of robot end tools, in particular to design and a preparation method of a robot tool changer. The known technical parameters and the known mechanical principle of the robot are utilized, the load and the torque of the bearing mechanism are accurately calculated, and tool replacers of different specifications are manufactured. The robot tool changer is designed by utilizing a lever principle and a transverse pin structure, so that the tool changer and a tail end tool are positioned on the same stress surface, and the stability of the tool changer is ensured. The tool changer adopts a split type design, and the bearing mechanism and the tool changer body are made of double-alloy materials, so that the rigidity and durability of the tool are ensured, and the characteristic of light weight of the tool is also ensured. And different surface treatment processes are adopted for two different metal materials of the tool changer, so that the wear resistance and corrosion resistance of the tool changer are ensured. According to the technical scheme, large-scale industrial production can be achieved, and the application market of continuously-developing robot tool replacers is met.

The invention relates to the technical field of the building industry, and discloses a fabricated steel structure and an installation method, the fabricated steel structure comprises frame columns and frame beams, and the frame columns and the frame beams are connected in a matched mode; the modular node units are detachably connected with the frame columns and the frame beams respectively; the modularized joint unit comprises a first connecting plate and a second connecting plate, the sides, deviating from each other, of the first connecting plate and the second connecting plate are suitable for being connected with one ends of the adjacent frame columns correspondingly, and a box type steel column section is arranged between the first connecting plate and the second connecting plate; the two ends of the box type steel column section are connected with the first connecting plate and the second connecting plate correspondingly. The modularized joint units are further provided with I-shaped steel beam ends, and the two I-shaped steel beam ends are connected with the two ends of the box type steel column section respectively in the extending direction of the frame beam.

A horizontal machining center with a head swing, comprising a spindle holder, a driving mechanism, a spindle and a worktable for supporting, fixing and driving a product to be machined to rotate, the spindle is installed on the spindle holder and is driven to move by the driving mechanism, the spindle is provided with a head swing, the head swing is connected with a tool shank, the end of the tool shank away from the head swing is provided with a side connecting part and a bottom connecting part, the side connecting part is located on the outer side wall of the tool shank, the bottom connecting part is located on the bottom of the tool shank and faces the side of the worktable, the side connecting part and the bottom connecting part are both connected with a turning tool arranged along the central axis direction. Compared with the prior art, the horizontal machine tool can shorten the moving stroke of the spindle, ensure the rigidity of the spindle, and alleviate the problems of low product machining quality and low service life of the turning tool caused by the vibration of the spindle during the machining process. In addition, by arranging multiple turning tool connecting positions, when multiple turning tools are needed during the machining process, the tool changing operation is not needed or the tool changing frequency is saved, the tool changing time is saved, and the machining efficiency is improved.

This invention provides a special disassembly tool and method for abrasive rollers in automotive clutch steel sheet grinding equipment. The tool includes: a first fixing component mounted on the rotating shaft of the abrasive roller; a first disassembly component mounted on a first fixing nut on the rotating shaft of the abrasive roller; a second fixing component mounted on the back plate of the grinding equipment; and a second disassembly component fitted onto a second fixing nut on the rotating shaft of the abrasive roller. Both the first and second fixing components have contour holes that mate with the rotating shaft of the abrasive roller. The first fixing component manually restricts the rotation of the rotating shaft, and the second fixing component restricts the rotation of the rotating shaft by being fixed to the back plate and engaging with the contour holes. Both the first and second disassembly components have disassembly teeth, allowing the first and second fixing nuts to be disassembled by rotating the disassembly teeth. This invention solves the problems of inability to circumferentially lock the rotating shaft of the abrasive roller during disassembly and installation, and the inability of commonly used tools to achieve effective rotation in confined spaces.

The invention relates to a metal material OLED deposition mask. The deposition mask includes a deposition region and a non-deposition region. The deposition region includes an active portion and a non-active portion. The active portion includes a plurality of through-holes including small-surface holes formed in a depth direction from one surface and large-surface holes communicating with the small-surface holes in the depth direction from another surface opposite the one surface, and island-shaped portions located between the plurality of large-surface holes on the other surface. The average center line average surface roughness in the longitudinal direction and the average center line average surface roughness in the lateral direction of the island-like portion on the other surface are 0.1 [mu] m to 0.3 [mu] m, respectively; an average 10-point average surface roughness in a longitudinal direction and an average 10-point average surface roughness in a lateral direction of the island-shaped portion on the other surface are 0.5 [mu] m to 1.5 [mu] m, respectively, the longitudinal direction being a rolling direction of the metal material, and the lateral direction being a direction perpendicular to the rolling direction.

The present invention provides a positioning and cutting device for CNC machine tool processing, which belongs to the technical field of CNC machine tools. The positioning and cutting device for CNC machine tool processing includes a machine base, a placement plate and a positioning mechanism. The placement plate is slidably installed in the inner cavity of the machine base, and the positioning mechanism is installed on the surface of the placement plate. The positioning mechanism includes a positioning seat, a clamping block and a driving block. The positioning seat is fixedly installed on the surface of the placement plate, and the surface of the positioning seat is symmetrically installed with a mounting seat. The surface of the mounting seat is rotatably installed with a connecting plate, and the clamping block is rotatably installed at one end of the connecting plate. The present invention sets a positioning mechanism, and the first electric telescopic rod can drive the support arm to drive the driving ring to move upward, so that the clamping block is driven to rotate counterclockwise through the first connecting rod to clamp the surface of the workpiece, and fix the workpiece in the inner cavity of the positioning seat. At the same time, when the driving ring rises, the wedge surface of the driving ring squeezes the wedge surface of the driving block, and the positioning rod abuts against the surface of the workpiece, so as to complete the synchronous positioning of the workpiece, facilitate use, and improve cutting efficiency.

The utility model discloses a large-capacity high-rigidity flat lathe bed capable of easily removing chips, relates to the technical field of lathe machining, and aims to solve the problems that a chip removal groove of an existing flat lathe bed is small in slotting size in order to guarantee the rigidity of the lathe bed, so that the chip removal efficiency is not high, and an existing lathe bed structure is generally suitable for side chip removal and is inconvenient to cooperate with a robot or a manipulator for operation. According to the machine tool body, the design of chip removal after connection of the machine tool legs and the machine tool body is adopted, automatic operation is facilitated, and the machine tool body comprises a material falling groove and an inclined material guiding plate, and the material falling groove is formed in the middle of the interior of a flat machine tool body main body; the inclined material guide plates are arranged on the two sides of the bed head and the bed tail of the material falling groove, the central material falling square cage is installed in the middle of the interior of the material falling groove, three downward-inclined inner ring plates are arranged on the inner wall of the central material falling square cage, and the three downward-inclined inner ring plates are distributed at equal intervals.

The utility model provides a hollow glass door body and a refrigerator. The hollow glass door body comprises a door frame and hollow glass, the hollow glass comprises inner glass and outer glass, and the door frame comprises a door body frame arranged on the periphery of the hollow glass and arranged in an L shape; the door body inner frame is connected between the door body frame and the hollow glass, the two ends of the door body inner frame are connected with the two ends of the door body frame in a clamped mode to form a containing space filled with a foaming agent, and the door body outer frame is connected with the door body inner frame in a buckled mode to define a mounting groove used for mounting the hollow glass. In the utility model, the door body inner frame and the door body outer frame simultaneously buckle and press the hollow glass to achieve a stable state. The foaming agent is filled between the door body frame and the door body inner frame, so that condensation of the door body frame is effectively reduced. Meanwhile, the foaming agent is not in contact with the hollow glass, different types of hollow glass can be replaced according to different use environments so as to meet specific use requirements, and higher compatibility is achieved.