2425results about How to "Stable structure" patented technology

The invention relates to a crushing machine of raw material for preparing a wood shaving artificial board. The machine comprises a box body, a driving device, an air blower, a crushing device, an auxiliary fixing device and a feeding device, wherein the driving device is installed on the front side of the box body, the air blower is installed at the lower end inside the box body, the crushing device is installed in the middle of the box body, the crushing device is located at the upper end of the air blower, the auxiliary fixing device is installed at the upper end of the box body, and the feeding device is installed at the right end of the box body. The crushing machine of the raw material for preparing the wood shaving artificial board can solve the problems that when existing wood shaving machining equipment is used for cutting treatment, the number of cutting tools is small, the cuttings generated through cutting treatment are large in size, the cutting tools are prone to be damaged and are complicated to replace, the wood material is directly cut and machined without limiting and fixing, severe shaking, splashing and even flying are generated in the wood material machining process, so that potential safety hazards and the like are generated in the operation process are solved.

The invention belongs to the technical field of high-speed rotary tables, and discloses a high-stability high-speed rotary table for a milling machine and an operation method thereof.The high-stability high-speed rotary table comprises a rotary table top disc and a rotary table base, the rotary table base is located below the rotary table top disc, and a sleeve hole and a first groove are formed in the top face of the rotary table top disc. The upper portions of the adjusting assemblies which are in relative spiral sleeve connection are made to independently move upwards, the multiple clamping assemblies are driven to move upwards, in cooperation with forming of first grooves, the first clamping rods for actually clamping a workpiece at the top of the rotary table top disc can be accurately adjusted up and down, and therefore when the workpiece is actually clamped, according to the height condition of the top machining end of the workpiece, the machining efficiency is improved. The actual clamping position is adjusted, so that the workpiece is stabilized at the gravity center distribution position of the workpiece during clamping and fixing, better stability is achieved when the workpiece is matched with high-speed rotation and external stress machining under clamping, the application range of workpiece clamping rotation is widened, and meanwhile the stability of a high-machining workpiece under actual high-speed rotation is further improved.

The invention discloses a preparation method of a high-stability photoresponse covalent organic framework membrane and application of the high-stability photoresponse covalent organic framework membrane in selective separation of multiple components. 4-azido azobenzene is prepared by carrying out azido reaction on 4-aminoazobenzene in an acidic aqueous solution, and then a BPTA-TAPB-COF membrane is used as a matrix to prepare the high-stability photoresponse covalent organic framework membrane. 4-azido azobenzene is efficiently grafted to the pore wall of the BPTA-TAPB-COF membrane through a click chemical reaction, the photoresponse covalent organic framework membrane is constructed, and the covalent organic framework membrane can be used for multi-component selective separation and is suitable for multi-component systems with different sizes. The azobenzene group in the pore channel of the prepared Azo-COF membrane is subjected to reversible cis-trans isomerization under the irradiation of ultraviolet / visible light, the response speed is high, and the cycle performance is good; the Azo-COF membrane has good application in the light-operated nanofiltration process, the performance of the Azo-COF membrane is not reduced after the Azo-COF membrane is continuously recycled for 12 days, and the structure of the Azo-COF membrane is kept stable.

The invention discloses a preparation method and antibacterial application of a naphthothiadiazolyl photosensitizer, and belongs to the technical field of biomedical antibacterial materials. The naphthothiadiazole-based photosensitizer provided by the invention overcomes the problem that the existing commercial photosensitizer gathers and quenches the active oxygen efficiency, and meanwhile, the antibacterial photosensitive polymer prepared based on the novel naphthothiadiazole-based photosensitizer has the unique advantages that the structure is stable, photosensitizer micromolecules are not easy to leak and the antibacterial effect is long-acting; the construction of the antibacterial polymer coating on the surface of the medical instrument in the future has important clinical application potential. The naphthothiadiazolyl photosensitizer provided by the invention has good photodynamic killing performance on drug-resistant bacteria MRSA (Methicillin Resistant Staphylococcus Aureus).

The embodiment of the invention provides a connector terminal plug-in mounting device, and relates to the technical field of automatic assembly equipment, the connector terminal plug-in mounting device comprises a rack and a working track arranged on the rack, a feeding mechanism, two plug-in mounting mechanisms and a discharging mechanism are sequentially arranged along the processing direction of the working track, and a carrying mechanism is arranged at the working track. The plug-in mounting mechanism comprises a terminal feeding assembly, a plug-in mounting assembly and a material folding assembly, the plug-in mounting assembly comprises a first sliding block and a second sliding block which move in the two perpendicular directions, the first sliding block is provided with a plug-in mounting head, the second sliding block is connected with a clamping plate used for clamping a terminal material belt, and the plug-in mounting mechanism further comprises a shearing assembly. The shearing assembly is of a cutter structure driven by a lever, and a cutter automatically resets by means of shearing reaction force after shearing is completed. The device has the effects of preventing the terminal material belt from being cut by mistake and effectively separating the terminal from the material belt.

The invention discloses a preparation method and application of a bimetallic phosphate oxygen evolution electrode. The preparation method of the bimetallic phosphate oxygen evolution electrode comprises the following steps: cleaning a nickel substrate in an alkaline solution to remove oil, and cleaning the nickel substrate with pure water; soaking the cleaned nickel substrate in an acid solution, cleaning the nickel substrate with pure water, and placing the nickel substrate in the pure water for later use; the nickel substrate placed in the pure water serves as a cathode, two pure nickel materials are placed on the two sides of the nickel substrate to serve as two anodes, and electro-deposition is conducted on the nickel substrate in a bimetallic phosphate solution; and washing an electrode obtained after electrodeposition of the nickel substrate, and drying to obtain the bimetallic phosphate electrode. According to the preparation method, the adsorption free energy of a catalytic layer on the surface of the bimetallic phosphate oxygen evolution electrode on a reaction intermediate is optimized through the synergistic electronic effect of two metals, so that the intrinsic activity of oxygen evolution reaction is improved, meanwhile, a relatively stable catalytic layer structure is formed, and the stability of the bimetallic phosphate oxygen evolution electrode in the oxygen evolution process is improved.

The invention relates to the technical field of photocatalytic processes, in particular to a catalyst for preparing methanol through photocatalytic reduction of CO2 as well as a preparation method and application of the catalyst. The catalyst comprises a composite carrier and active sites dispersed on the surface or in pores of the composite carrier, the composite carrier is of a heterojunction composite structure formed by a hollow TiO2 sphere and MCN, the hollow TiO2 sphere comprises a shell layer and a spherical cavity structure located in the shell layer, the shell layer is formed by TiO2 nanoparticles, and the MCN has a mesoporous pore structure; a II-type or Z-type heterojunction interface is formed between the hollow TiO2 spheres and the MCN through physical contact and chemical action; the active sites comprise copper nano species, sulfur vacancy defects and amino groups; the copper nano species are copper nano particles or clusters, and the valence state of copper is 0 and / or + 1 valence amino is grafted on the surface of the composite carrier through an organic long chain. The catalyst provided by the invention can greatly improve the yield and selectivity of methanol prepared by photocatalytic reduction of carbon dioxide.

The present invention belongs to the field of lithium extraction, and specifically relates to a H 1.6 Mn 1.6 O4@H2TiO3 composite lithium ion sieve, comprising H 1.6 Mn 1.6 O4 with a porous structure, and H2TiO3 embedded in the pore structure and surface-coated in H 1.6 Mn 1.6 O4. The present invention also includes the preparation of the material and its application in lithium extraction. The material described in the present invention has excellent lithium extraction capacity and cycle stability.

The utility model discloses a kind of scooter controller end cover and scooter, the controller end cover includes end cover body, door leaf, hinge, plug-in door column, plug-in buckle, wire harness cavity;End cover body is set as plate block structure and is provided with cavity in center, two door leaves are symmetrically placed in cavity, the root of door leaf is connected with end cover body by its hinge, and door leaf is opened or closed by rotating through its hinge;The outer end of door leaf is provided with prefabricated hole, and wire harness cavity is formed through wire harness;Sealing glue is provided between wire harness cavity inner wall and wire harness;The back of one door leaf is provided with plug-in buckle, the back of another door leaf is provided with matching plug-in door column, and form snap structure fixed.The utility model controller end cover only rotates by its own hinge, and locking is realized when closing by its own snap structure, assembly operation is very simple, convenient to maintain, and stability is high.

The utility model relates to sofa manufacturing technical field especially is involved in the enhancement design of packing and transportation of sofa, a full dismounting sofa bed, including support base and sofa cushion subassembly, its characterized in that: support base includes support frame, support bottom plate and is located at the detachable supporting leg of support frame four corners, sofa cushion subassembly includes seat cushion, back cushion and side stop pad, seat cushion is detachably connected with support bottom plate through magnetic connection component, and the detachable connecting component is equipped between side stop pad and support bottom plate, back cushion and support bottom plate.

The utility model relates to the technical field of mesh belt furnace, concretely to a conveying device suitable for mesh belt furnace extension, mistake-proof material mixing, including machine body frame, the utility model discloses the transmission reduction motor speed is changed through the adjustment motor speeder, and the transmission chain and the gear drive the conveyer belt transmission shaft rotation, make the conveyer belt speed close mesh belt speed of former station, and the workpiece is driven to the conveyer belt on the conveyer belt through the unpowered roller, when the workpiece is completely conveyed to the material receiving inductor position, the material receiving alarm will occur sound and light alarm prompt, and the operator comes over to receive the material, and the conveyer belt uses a period of time, can pass through the adjustment conveyer belt tensioning shaft adjustment conveyer belt tension, guarantee no skidding phenomenon, and the mesh belt furnace inlet end, when the first workpiece or material of batch enters the furnace, put a workpiece containing the isolation mark, press the batch into the furnace button, when the workpiece or material of batch is discharged, the last batch has all been discharged, and the material receiving alarm will always alarm prompt at this time.

The utility model relates to a damping type server case which comprises an outer case body and an inner frame body arranged in the outer case body, a gap is formed between the inner frame body and the outer case body, the inner frame body is defined by an inner bottom plate, an inner right side frame and an inner rear side frame, the inner bottom plate and the outer case body are supported through a plurality of sets of bottom damping pieces, and the bottom damping pieces are arranged in the outer case body. An L-shaped inner support is further arranged on the side, away from the inner right side frame, of the inner bottom plate, one end of the inner support is connected with the inner bottom plate, the other end of the inner support is connected with the top of the inner rear side frame, and the inner right side frame, the top of the inner support and the outer box body are supported through multiple sets of top damping pieces. The gap is formed between the outer box body and the inner frame body, and the damping pieces are arranged on the upper side and the lower side of the outer box body to conduct damping protection on the components on the inner frame body, so that the possibility that the components are damaged is reduced, and the stability of the server in the using process is guaranteed.

The utility model relates to a wall seat structure for installing and fixing a sunshade, which belongs to the technical field of the sunshade and comprises an arm seat frame connecting piece, a transition connecting block is arranged at the front end of the arm seat frame connecting piece, and a bolt through hole connected with the arm seat frame connecting piece through a screw and nut structure is arranged on the transition connecting block. The arm seat frame connecting piece comprises an inserting block, an adjusting connecting block integrated with the inserting block is arranged at the front end of the inserting block, and a U-shaped fixing groove penetrating through the bolt is formed in the adjusting connecting block. The device has the characteristics of simple structure, convenience in installation and high structural strength. The wall body fixing part and the sunshade arm connecting part are connected through the movable transition pivot, so that angle fine adjustment after installation is achieved, and different sunlight irradiation angles or storage requirements are met.

The utility model discloses an easy-to-clean durable type disc filter element, including first support post and a plurality of first filter disc, the first filter disc is sleeved in the outside of first support post, the first filter disc includes first support steel ring, first inner filter screen and first outer filter screen, first inner filter screen and first outer filter screen all are symmetrically arranged in both ends of first support steel ring, first outer filter screen is located the outside of first inner filter screen, the middle part of first support steel ring, first inner filter screen and first outer filter screen is equipped with first connecting assembly, the utility model provides an easy-to-clean durable type disc filter element, and its structure is stable and reliable, has good structural strength, and first inner filter screen and first outer filter screen are supported through first support steel ring, guarantee its pressure strength, and can quick assembly and disassembly, convenient cleaning, more simple.

The utility model discloses a closestool cover plate quick release connecting pipe assembly, which comprises a connecting pipe and two lock catch mechanisms, each lock catch mechanism comprises a push rod, a fixed shaft, a damper and a lock catch spring, a rotating shaft of the damper is exposed out of the connecting pipe when the lock catch mechanism is inserted into the connecting pipe and reaches a working position, and the lock catch spring is inserted into the connecting pipe. The fixing shaft is provided with a first elastic column, the connecting pipe is provided with a positioning hole, and the first elastic column is bounced into the positioning hole when the locking mechanism reaches the working position. The first elastic column is pressed to leave the positioning hole and pushes the damper inwards, so that the damper and the fixing shaft can compress the lock catch spring and then move inwards till the rotating shaft of the damper retracts into the connecting pipe. The lock catch mechanism is assembled and positioned through the first elastic column of the fixing shaft and the positioning hole of the connecting pipe, and the arrangement that the inner side direction reaches the limiting position when the push rod reaches the working position is combined, so that assembling and mounting of the quick-release connecting pipe assembly are more convenient and faster.

The utility model discloses a take inner wall cleaning structure's toning machine belongs to toning machine technical field, including mounting panel, and the mounting panel is fixedly connected through bolt no.

The application relates to the technical field of massage equipment, in particular to a sliding contact power supply device and a massage chair, which comprises a strip-shaped conductive assembly, a sliding conductive assembly and at least one flexible rack; the flexible rack is used for engaging and driving a gear on a massage core; the strip-shaped conductive assembly is used for electrically connecting with an external power supply and is installed along the extension path of the flexible rack; the sliding conductive assembly comprises a mounting seat and a conductive structural member; the mounting seat is fixedly installed on the massage core; when the massage core moves along the flexible rack, the conductive structural member is fixed on the mounting seat and is in sliding contact with the surface of the strip-shaped conductive assembly to supply power to the massage core. The application has the advantages of compact structure, small space occupation, stable power supply and good adaptability to the reciprocating motion of the massage core.

This utility model discloses a precision preforming machine with a residual adhesive recovery structure, comprising: a molding box and a molding template, with a base installed below the molding box; the molding template is tightly fitted to the right side of the molding box, and the molding template is mounted on the molding box via a connecting mechanism that facilitates the recovery of residual adhesive; a cutting mechanism for preventing uneven cut surfaces is provided on the upper right side of the base. The connecting mechanism includes a mounting block, a support spring, a mounting rod, and a mounting cap; the outer end of the molding template is tightly fitted to the mounting block, and a support spring is installed on the left side of the mounting block; the molding template and the mounting block are both internally connected to the mounting rod via slots. This precision preforming machine with a residual adhesive recovery structure allows for quick assembly and disassembly of the template, cleaning of internal residual adhesive, prevention of residual adhesive mixing with processed adhesive reducing yield, and uniform cutting, ensuring a smooth cut surface.

An automatic shutdown control device and a radiation source system are disclosed. The automatic shutdown control device includes a first actuator (15), a first one-way throttle valve (6), a first pilot-operated one-way throttle valve (11), a first directional valve (110), a fluid pressure source (1), a first return line, a fluid control valve (10), and a first accumulator (13). The first pilot-operated one-way throttle valve (11) includes a second one-way throttle valve (112) and a first one-way valve (111). When power is off, the first directional valve (110) switches to a second operating position (123), the outlet of the fluid pressure source (1) is connected to the through port of the second one-way throttle valve (112) through the first directional valve (110), and the through port of the first one-way throttle valve (6) is connected to the inlet of the first return line through the first directional valve (110). When the fluid pressure source (1) is outputting, the fluid control valve (10) switches to the closed position (101); when the fluid pressure source (1) is disconnected, the fluid control valve (10) switches to the open position (102), and the outlet of the first accumulator (13) is connected to the closed port (B2) of the first actuator (15) through the fluid control valve (10). This device can automatically complete the shutdown action in the state of power failure and / or flow interruption, without the need for manual shutdown, reducing the risks associated with manual operation.

The utility model relates to ultraviolet germicidal lamp device technical field, specifically is ultraviolet sterilizer with lamp tube self -locking structure, include: lamp body structure, it includes quartz sleeve, the quartz sleeve is limited to have the lamp stand inside sliding connection, the part of lamp stand is installed ultraviolet lamp tube in quartz sleeve inside, quartz sleeve outer wall fixed mounting has the sterilizer shell that it is wrapped, lamp tube self -locking structure, it includes micro -switch seat, micro -switch seat sliding connection in quartz sleeve, be provided with the elastic button structure of control lamp stand electricity on micro -switch seat. The device can make that micro -switch seat is put into in quartz sleeve, realize micro -switch seat put into quartz sleeve when ultraviolet lamp tube electricity, when ultraviolet lamp tube power failure when micro -switch seat is taken out from quartz sleeve, to meet the lamp tube from the sterilizer dismantles, will cut off the power supply of lamp tube, prevent ultraviolet light from injuring the eye and skin of operator.

This invention relates to an attached milling unit, the housing of which has an attachment bracket for attachment to a movable support arm of a carrier. The housing extends along a longitudinal axis (01). Furthermore, the attached milling unit includes at least one motor (02) and a transmission unit, the axis of rotation (05) of which is perpendicular to the longitudinal axis (01) of the housing. Two cross-cutting heads (06) driven to rotate by the transmission unit are attached to both sides of the longitudinal axis (01) of the housing and carry several milling cutters (07). Each cross-cutting head (06) has a driven output shaft (09) about which it rotates, wherein the two output shafts (09) of the cross-cutting head (06) are arranged at an angle to each other and each forms an acute angle with the longitudinal axis (01) of the housing on the side opposite to the attachment bracket. Each output shaft (09) is attached with a driven gear (10) having helical teeth, wherein each helical tooth directly meshes with the corresponding spur tooth segment of the drive spur gear (04).

The utility model relates to the field of agricultural machinery engineering technology discloses a leek field weed cleaning device, include: handle, for U type state, horizontal setting, U type middle part both sides can place the shoulder strap, shoulder strap, total two groups, through two groups of round magic paste and paste to handle, sliding rod, by a group of thick cylinder and a group of thin cylinder weld together, and place obliquely, and thick cylinder is fixed in handle middle part one side, and thin cylinder one end is provided with fixed mechanism, fixed rod, for cylinder cover, place obliquely, and its one end and the thin cylinder end of sliding rod sliding connection. The locking effect of sliding rod cooperation and fixed mechanism can quickly adjust the overall length of the device, adapt to different height users, the position adjustment of sliding blade and L type board can flexibly change the operation distance, accurately adapt to different row distance leek field, the shoulder strap is convenient for user to bear the device, reduces the handheld operation burden, the adjustment component is simple to operate, and can be stored and save space, improves overall operation efficiency and use safety.

This utility model discloses a support system for an integrated sloping roof and courtyard, and a residential photovoltaic power station. The system includes a roof support and a courtyard support. The roof support comprises several horizontally spaced inclined beams on a first sloping roof, several horizontally spaced back braces on a second sloping roof, and short column support assemblies installed on both the first and second sloping roofs to support the inclined beams and back braces. The back braces are correspondingly positioned to the inclined beams, with their upward-sloping ends connected to the beams. The inclined beams extend downwards along the first sloping roof to above the courtyard. The courtyard support includes columns installed within the courtyard, with their upper ends connected to the inclined beams. A reinforcement structure is provided between the columns and the inclined beams, and / or between the columns themselves. The roof support and courtyard support can be designed as a single unit, forming a unified slope above the first sloping roof and courtyard for installing photovoltaic modules, increasing the number of photovoltaic modules installed and expanding the power generation area.

The utility model relates to a height-adjustable SB-grade guardrail which comprises a stand column, an anti-blocking block is fixedly installed on the stand column, a wave-shaped guardrail is detachably and fixedly installed on the anti-blocking block, the anti-blocking block comprises a front side plate and a rear side plate which are symmetrically arranged, and a connecting part is arranged on the upper portion of the side, connected with the wave-shaped guardrail, of each side plate. A top plate is arranged on the side, connected with the wave-shaped guardrail, between the tops of the two side plates, a mounting cavity is formed in the side, away from the wave-shaped guardrail, of each side plate, the mounting cavity is defined by a first limiting plate, a second limiting plate and the two side plates, the first limiting plate is fixedly connected between the interiors of the two side plates, and the second limiting plate is fixedly connected between the interiors of the two side plates. The second limiting plate is fixedly connected between the sides, away from the wave-shaped guardrail, of the two side plates. Adjusting hole sets are formed in the positions, corresponding to the mounting cavities, of the stand columns, and mounting hole sets are formed in the side plates. According to the utility model, a height adjusting space is reserved for paving the road surface, the SB-level protection level is maintained, the construction is simple and convenient, the cost is low, the compatibility is strong, and the green road construction concept is met.

The application discloses a two-dimensional acceleration sensor based on a ring-shaped weak coupling structure and relates to the technical field of weak vibration signal detection. The two-dimensional acceleration sensor comprises a center support structure, a ring-shaped weak coupling structure, a cantilever beam plus mass sensitive detection structure and a piezoelectric excitation and detection unit. The center support structure supports the ring-shaped weak coupling structure through elastic spokes, the ring-shaped weak coupling structure is composed of an inner ring, an outer ring and a coupling beam connecting the two, the piezoelectric excitation unit is arranged on the inner ring for generating in-plane traveling wave vibration, and a plurality of cantilever beam plus mass sensitive units are symmetrically distributed along the outer ring in the circumferential direction. The application constructs a ring-shaped weak coupling vibration energy network, realizes the propagation and redistribution of vibration energy among the plurality of sensitive units, separates the excitation and detection regions in space, effectively improves the weak acceleration detection sensitivity, reduces excitation crosstalk and realizes the decoupling detection of two-dimensional acceleration, and is suitable for the fields of high-precision inertial measurement and weak vibration monitoring.

This utility model relates to the field of road and bridge construction technology, and in particular to a fixing structure for repairing road and bridge cracks. It includes a cylinder and a road surface. A crack groove is provided at the crack in the road surface for placing the cylinder. A top groove is formed above the crack groove. A vertically placed support is slidably installed inside the cylinder. A waterproof plate is fixedly connected to the top of the support after it slides through the cylinder. An inner cavity is formed at the top of the cylinder. Connecting rods are rotatably connected to both sides of a section of the support located in the inner cavity. A pull rod is rotatably connected to the end of the connecting rod away from the support. A fixing rod is provided at the end of the pull rod away from the connecting rod. This application improves construction efficiency and reduces difficulty through convenient adjustment of the fixing structure. Furthermore, the design of barbs and waterproof grooves enhances structural stability and waterproof performance. The mechanical structure under stress also prevents further cracking, ensuring the quality of the repair work in terms of construction efficiency and long-term stability of the repair effect.

The application belongs to the technical field of sand consolidation agent preparation, and particularly relates to a sand consolidation agent and a preparation method thereof. The sand consolidation agent is composed of component A and component B. The component A is composed of the following raw materials: a diphenyl phenolic epoxy resin, hexakis(4-hydroxymethylphenoxy)cyclotriphosphazene, modified nano calcium zirconate, cage octakis(aminophenyl)silsesquioxane, n-butyl glycidyl ether, KH-550 silane coupling agent, polyether amine, fumed silica and defoaming agent. The component B is composed of the following raw materials: polyborosilazane and 2-ethyl-4-methyl imidazole. The cage octakis(aminophenyl)silsesquioxane in the raw material of the sand consolidation agent strengthens the network structure stability through chemical bonding, the hexakis(4-hydroxymethylphenoxy)cyclotriphosphazene realizes thermal stabilization through chemical bonding and physical dispersion, and the modified nano calcium zirconate provides physical support. The three components synergistically improve the heat resistance of the system.

This application provides an end cap assembly, an energy storage device, and an energy storage system. The end cap assembly includes an end cap, a lower plastic component, and a first support. The lower plastic component further includes a first through groove and a first boss. The first boss protrudes from one side of the lower plastic component along its thickness direction and is located at the end of the lower plastic component along its length direction. The first boss has a boss surface, and the first through groove penetrates the first surface and the boss surface. The first through groove includes a first groove sidewall, a second groove sidewall, and a groove bottom wall. The first groove sidewall and the second groove sidewall are opposite to and spaced apart from each other. The groove bottom wall is connected to the first groove sidewall and spaced apart from the second groove sidewall. The groove bottom wall is provided with a vent hole and a vent groove, and the second groove sidewall is provided with an exhaust hole. The vent groove, the exhaust hole, and the vent hole are all connected to the outside of the first through groove and the lower plastic component, and the vent groove is connected to the vent hole. Along the thickness direction of the end cap assembly, the end cap and the lower plastic component are stacked and connected, with the first surface facing the end cap. The first support is received in the first through groove and fixed to the lower plastic component, and is used to support the end cap.