CN112572256A - All-aluminum mortise-tenon type telescopic armrest chair - Google Patents

Abstract

The all-aluminum tenon-and-mortise type telescopic armrest chair comprises a plurality of seat leg bent pipes, armrest leg bent pipes and a backrest support bent pipe, wherein the seat leg bent pipes and the armrest leg bent pipes are fixedly connected with the ground; the elbow pipes of the armrest legs are fixed with the two sides of the seat frame, and the armrests are arranged above the elbow pipes of the armrest legs. The invention changes the connection mode of welding and riveting in the traditional aluminum alloy seat, adopts various mortise-tenon insertion modes for connection, hardly uses bolt connection, rivet connection and few welding, avoids the defects caused by the traditional connection mode, and has the advantages of less overall material consumption of the seat, strong bearing capacity, difficult deformation and damage, beautiful appearance arc line and the like.

Description

All-aluminum mortise-tenon type telescopic armrest chair

Technical Field

The invention relates to the technical field of new energy automobile manufacturing, in particular to an all-aluminum mortise and tenon type telescopic armrest seat.

Background

The new energy automobile adopts unconventional automobile fuel as a power source, and the formed automobile has advanced technical principle, new technology and new structure. The new energy automobile comprises a type hybrid electric automobile, a pure electric automobile, a solar automobile, a fuel cell electric automobile and other types except pure fuel oil driven automobiles. The endurance of the new energy automobile is an important index for considering the reliability of the new energy automobile, and the endurance mileage of the new energy automobile is greatly limited by the energy storage and conversion capability of the new energy in the prior art. Therefore, the reduction of weight of the vehicle body is an important means for improving the cruising ability. The adoption of lighter aluminum alloy vehicle body frame and aluminum alloy vehicle parts becomes a better choice. Particularly in the field of public transport vehicles, large, medium and small buses and sightseeing vehicles contain a large number of passengers in the cabins, seat components are densely arranged, the weight of the seat components accounts for the total weight of the vehicle body, and the seats occupy more space in the cabins, so that the design of the seats plays an important role in the design of the public transport vehicles.

Although all-aluminum seats have the advantage of being light in weight, aluminum alloys have an elastic modulus of only one third of that of steel and are insufficient in rigidity compared with steel seats, thus causing: 1. when the aluminum rod is fixedly connected by using bolts, screws and the like, bolt holes of the aluminum rod are often damaged and deformed at the positions of the bolt openings of the bolts subjected to shearing force; in other aluminum alloy seats adopting welding connection, the metal structure of the aluminum alloy is changed due to the thermal welding at the welding part, the crystal grains are large, the mechanical property loss of the welding part is at least more than 40 percent, and the stress of the integral structure of the seat is not facilitated; 2. due to insufficient rigidity of the aluminum rod piece, the large-span part of the rod piece is easy to deform and bend under the heavy pressure or impact state; 3. the existing aluminum vehicle seat is simple and square in shape, is not aesthetic, and is easy to cause injury to passengers due to sharp edge corners; 4. in order to facilitate passengers to get in and out of seats and improve the riding comfort of the passengers, the armrests are usually designed into a telescopic or hinged structure, but after the armrests are used for a long time, the telescopic joints and the hinges are easy to loosen, so that abnormal sound of seat parts is caused, and the movable parts are not smooth in movement.

The following publications are found in relation to vehicle seats:

1. an aluminum alloy subway vehicle passenger room seat; application No.: cn201020669744. x; the applicant: south Pole, shores electric locomotives; the passenger room seat of the aluminum alloy subway vehicle consists of a seat support, a seat surface and an outer cover plate, wherein the seat support is provided with a screw hole, the seat support is connected with the side wall of an aluminum alloy vehicle body through a screw, and the seat surface consists of a glass fiber reinforced plastic shell, a reinforcing plate, a polyurethane cushion and a covering cloth. The utility model discloses simple structure, whole pleasing to the eye, light, the intensity of structure is high, convenient dismantlement installation, no bolt exposes, maintains simply. The floor surface of the passenger room is convenient to clean, and the device is suitable for arranging transverse seats of subway vehicles or light rail vehicles.

2. An urban bus seat; application No.: CN 201520351723.6; (ii) a The applicant: jiangsu duke New energy automobile company, abstract: a city bus seat comprising: an L-shaped aluminum alloy framework at least used for supporting the backrest and the cushion; the L-shaped aluminum alloy bending bracket is at least used for partially supporting the cushion and fixing the cushion with the car body; a backrest and a cushion. The aluminum alloy framework comprises a first supporting part fixedly connected with the backrest and a second supporting part fixedly connected with one end of the cushion, the aluminum alloy bending support comprises a third supporting part fixedly connected with the other end of the cushion and a fourth supporting part fixedly connected with the automobile body, and a cavity is formed between the third supporting part and the fourth supporting part below the cushion. The utility model has simple and active appearance, and meets the requirements of most people; the aluminum alloy bracket is adopted, so that the weight is light, and the light weight requirement is met; the aluminum alloy bending elastic support has better shock absorption performance, and both static comfort and dynamic comfort can be met; the cavity space under the cushion can be fully utilized, the foot extension space of the passengers in the back row is sufficient, and the comfort level can be improved.

3. A novel car seat; application No.: CN 201520351725.5; the applicant: jiangsu duke New energy automobile company, abstract: a novel car seat, comprising: a backrest and a cushion; an L-shaped aluminum alloy framework at least used for supporting the backrest and the cushion; the four-leg bracket is fixedly connected with the bottom of the aluminum alloy framework; and the guide rail is in sliding connection with the bottom of the four-foot support and is fixedly connected with the vehicle body. The aluminum alloy framework comprises a first supporting part and a second supporting part, the first supporting part is fixedly connected with the backrest, and the second supporting part is fixedly connected with the cushion. One side of the cushion is provided with a backrest angle adjuster which is at least used for adjusting the angle of the backrest. The utility model has simple structure, reasonable design, concise appearance, fashion and vitality, and meets the requirements of most young people; the aluminum alloy is light and soft in weight, meets the requirement of light weight, has good structural comfort of the elastic backrest, does not need to use an excessively thick backrest, and saves materials; comfortable and practical, and has good application prospect.

4. An aluminum alloy fixed seat; application No.: CN 201820434486.3; the applicant: fan Jingming, abstract: an aluminum alloy fixed seat is characterized in that: constitute by a back (1), two aluminum alloy frame (5), a bottom plate (2) and two landing leg (3), back (1) is hollow structure, bottom plate (2) are hollow structure, and back (1) both ends are provided with wedge strip (1-1) respectively, and every aluminum alloy frame (5) link to each other with one end, a landing leg (3) of a wedge strip, bottom plate (2) respectively, landing leg (3) and aluminum alloy frame (5) integrated into one piece are provided with supporting seat (6) on landing leg (3), are provided with handrail (4) on supporting seat (6), be provided with the wedge on the both ends face of bottom plate (2) respectively, the wedge is connected with aluminum alloy frame (5). The utility model provides a light, bearing capacity is strong, the cooperation is inseparable, environmental protection.

5. A multipurpose aluminum alloy seat accessory; application No.: CN 201820053239.9; the applicant: guangzhou City classical hardware armchair, Inc.; and (3) abstract: a multipurpose aluminum alloy seat accessory comprises an aluminum alloy bayonet part and an aluminum alloy clamped part, wherein the aluminum alloy is fixedly connected to one end of a seat support frame at the lower part of a seat by the bayonet part, the aluminum alloy bayonet part is fixedly connected to one side of the lower end of a chair leaning on the support frame, the chair leans on a third support leg fixedly connected to the lower end of the support frame, the upper end of the third support leg is bent, one side of the aluminum alloy bayonet part is fixedly connected with the bent part at the upper part of the third support leg, the chair leans on two sides of the support frame respectively and is provided with a first support leg and a second support leg in a threaded manner, one side of the first support leg is fixedly connected with a first screw rod and a second screw rod, one side of the second support leg is fixedly connected with a third screw rod and a fourth screw rod, and through the design of the aluminum alloy bayonet part and the aluminum alloy clamped part, a fixed structure is formed, the fixing is convenient and the disassembly is easy.

The existing documents show that no device for automatically welding the foundation bolt assemblies specially used for the electric iron tower is described.

6. A lightweight automotive seat frame; application No.: CN 201910636782.0; the applicant: zhejiang industrial university, abstract: a light-weighted car seat skeleton aims at solving the technical problem that the light-weighted effect of the car seat skeleton in the prior art is poor. The invention comprises a cushion framework and a backrest framework connected with the cushion framework, wherein a cushion framework body of the cushion framework is connected with the backrest framework body through inner and outer back connecting plates made of aluminum alloy materials, the cushion framework body comprises a seat basin, preceding stay tube and back stay tube, the seat basin of aluminum alloy is located the cushion skeleton and keeps away from the one end of back skeleton, the back stay tube of aluminum alloy is located the junction of back skeleton and cushion skeleton, back stay tube and end basin are connected to cushion skeleton side wall, the preceding stay tube of aluminum alloy is established in end basin below, back skeleton body includes back return bend and headrest pipe stay tube, the back return bend of magnesium alloy is connected with the cushion skeleton through inside and outside back connecting plate, the headrest pipe stay tube of aluminum alloy is located the one end that the cushion skeleton was kept away from to the back skeleton, headrest pipe stay tube is connected with the back return bend.

7. An aluminum alloy seat frame; application No.: CN 201921121299.0; the applicant: changchun Guanxinruida railway passenger train fittings, Inc.: an aluminum alloy seat framework in the technical field of subway seat frameworks comprises a seat framework, an upper connecting plate, a special-shaped pipe, a first square pipe and a second square pipe; the seat skeleton passes through bolt fixed connection on subway carriage wall, the upper junction plate passes through bolt fixed connection in seat skeleton top, the block is connected between mechanical tubes and the upper junction plate, the utility model discloses well seat skeleton overall structure comprises the aluminium alloy, and single aluminium alloy passes through machining and accomplishes, assembles through welding and bolted connection's mode between the multiunit aluminium alloy, through change and the structural optimization to seat structure material, under the intensity requirement who satisfies subway seat, has alleviateed seat skeleton's weight greatly, simultaneously because the corrosion resisting property of aluminium alloy itself also is higher than the carbon steel, therefore improves seat skeleton's life.

8. The motor train unit seat rotating handrail; application No.: CN 201620090324.3; the applicant: suzhou Yangming industry Co., Ltd.; abstract: the utility model provides a rotatory handrail of EMUs seat, is including forging aluminum alloy material's support arm, support arm tip and top are connected with the plastic decoration board, and the other end is connected with the pillar of forging aluminum alloy material through the bolt, be provided with in the support arm be used for with the spacing stop gear of pillar, be used for with pillar angle of adjustment's adjusting screw. The handrail is divided into an upper structure and a lower structure and can rotate along the connecting center. The weight of the arm can be supported when the arm is put down, and the transverse space obstruction can be eliminated when the arm is folded; the forged aluminum alloy pillar has high structural strength. The handrail is designed to be a central hollow structure, so that the handrail cannot deform or break even if the center of gravity of the whole handrail falls outside the body; the handrail support arm horizontal adjusting screw is arranged in the upper side die-casting aluminum alloy, and the levelness of the handrail can be adjusted.

In summary, the existing aluminum alloy seat structure still has the above-mentioned various disadvantages.

Disclosure of Invention

The all-aluminum mortise-tenon type telescopic armrest chair provided by the invention changes the connection mode of welding and riveting in the traditional aluminum alloy chair, adopts various mortise-tenon insertion modes for connection, adopts few bolts for connection, rivets for connection and welding, avoids the defects caused by the traditional connection mode, and has the advantages of less overall material consumption, strong bearing capacity, difficulty in deformation and damage, beautiful appearance arc line and the like.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the all-aluminum tenon-and-mortise type telescopic armrest chair comprises a plurality of seat leg bent pipes, armrest leg bent pipes and a backrest support bent pipe, wherein the seat leg bent pipes and the armrest leg bent pipes are fixedly connected with the ground; the elbow pipes of the armrest legs are fixed with the two sides of the seat frame, and the armrests are arranged above the elbow pipes of the armrest legs. The joint part of the backrest support elbow and the seat leg elbow is locally spot-welded to prevent the backrest support elbow and the seat leg elbow from transversely moving.

And a backrest cross rod is arranged at the middle upper part of the backrest frame.

The end part of the horizontal part of the backrest support bent pipe is connected with the seat frame through a sleeve-top tenon-and-mortise structure, the middle part of the backrest support bent pipe is connected through a tenon-and-mortise structure, the groove of the backrest support bent pipe section corresponds to the groove of the seat frame section, and the joint groove of the backrest support bent pipe section and the seat frame section is embedded with a seat frame triangular plate for firm welding.

Adopt set top tenon fourth of twelve earthly branches structural connection between back slope portion tip and the back horizontal pole that the return bend was supported to the back, the middle part adopts to wear tenon structural connection with back frame, and the recess that the return bend section bar was supported to the back corresponds with the recess position of back horizontal pole, back frame section bar, and two liang of groove departments that meet inlay back frame set-square and weld firmly.

The middle part of the elbow of the armrest leg is connected with the seat frame by adopting a half-groove lap joint mortise-tenon structure, the end part of the elbow of the armrest leg is connected with the outer armrest profile by adopting a sleeve-top mortise-tenon structure, the groove of the elbow profile of the armrest leg corresponds to the groove of the outer armrest profile, and an elbow triangle plate of the armrest leg is embedded in the joint groove of the elbow profile of the armrest leg and the outer armrest profile for firm welding.

The outer handrail section is of an upper and lower double-cavity structure, the upper cavity is provided with an inner handrail section which can freely stretch out and draw back, the front end of the outer handrail section is sealed with the middle handrail end cover, the rear end of the outer handrail section is sealed with the rear handrail end cover, the front end of the inner handrail section is sealed with the front handrail end cover, and the tail end of the lower surface of the inner handrail section is provided with a limiting hole. When the handrail inner rod profile moves to the extension limit, the upturned tail part of the clamp spring is bounced into the limit hole on the lower surface of the handrail inner rod profile, and the handrail inner rod profile cannot extend continuously, so that the extension length of the handrail is controlled; when the handrail inner rod section bar is contracted, the clamp spring is not limited. The front, middle and rear end covers are used for sealing the handrail section bar cavity, so that dirt is prevented from entering the cavity and being difficult to clean, and the appearance is smooth and attractive. The rear end cover and the outer handrail section bar are fixed by the threaded fasteners arranged on the side surfaces, and the screws pass through the backrest frame and the outer handrail section bar, so that the inner handrail section bar can be prevented from sliding out of the rear part of the cavity, and the rear part of the handrail can be fixed with the backrest frame.

And a snap spring is fixed on the horizontal inner rib at the front end of the outer handrail profile cavity, and the upwarping tail part of the snap spring is in contact with the lower surface of the inner handrail rod profile. The groove is formed in the horizontal inner rib of the outer handrail section for accommodating the position of the clamp spring, the tail portion of the clamp spring supports against the lower surface of the handrail inner rod section, friction is generated, the handrail inner rod and the outer handrail section generate damping, and the handrail inner rod and the outer handrail section are kept stable and static under the condition of no external force.

The backrest frame is formed by butting two C-shaped sectional materials, and a backrest frame inserting core is arranged at the butt joint position to be fixedly inserted.

The seat frame is formed by butting two C-shaped sectional materials, and the butting position is provided with a seat frame inserting core for fixed splicing.

The double-C-shaped frame structure shortens the length of the section bar, is beneficial to processing and manufacturing and improves the yield; secondly, the butt joint frame structure has smaller joints, and the connection tightness is more beneficial to construction operation and assembly; thirdly, the setting of lock pin makes butt joint department intensity higher, when the lock pin installation, paints the structure and glues and fix, has strengthened the stability of lock pin more greatly.

The seat frame is fixedly provided with a seat cushion, the backrest frame is fixedly provided with a backrest cushion, and the middle parts of the seat cushion and the backrest cushion are respectively fixed with two end parts of a plurality of middle handrails through middle handrail end caps. The bolt passes through the seat cushion or the backrest cushion and is anchored into the threaded hole of the middle armrest end cap, and then the middle armrest is fixed with the seat.

The invention has the advantages that:

1. the various pipe fittings and connecting pieces of the invention are made of aluminum alloy materials, and the lightweight effect is obvious.

2. The invention adopts various tenon-and-mortise structures for combined connection among the pipe fittings, the pipe fittings are in stress transmission by utilizing the direct contact of the materials of the pipe body, few threaded fasteners or welding connections are adopted, the threaded connection and the welding position do not bear the bearing pressure from the upper vertical direction, the condition that the aluminum alloy material is subjected to the shearing force is avoided, the defect that the aluminum alloy material is not resistant to the shearing force is avoided, the advantage of light weight of the aluminum alloy is exerted, and therefore, the stability and the bearing capacity of the seat structure are greatly enhanced.

3. The pipe joint is positioned and reinforced by adopting a mode of profile grooves and a triangular plate, so that the pipe joints can be prevented from shifting and dislocating, the mutual supporting function among the pipe joints is improved, and the structural integrity is enhanced.

4. The invention takes the aspects of production material cost, production rationality, installation and construction convenience into consideration and optimization in all structures, and is characterized in that: the length of the profile is shortened due to the butt joint of the double-C-shaped frame structure, the fixed length is shorter during profile extrusion production, the control of extrusion head and tail residual materials is facilitated, and the yield is improved; the length of the profile is shortened by the butt joint double-C-shaped frame structure, the processing difficulty is greatly reduced when the pipe fitting is bent or rolled, and the success rate is greatly improved; the butt joint double-C type frame structure adopts plug-in type splicing, can well control the frame flatness, can finely adjust to a certain degree, and has good control on the shape and the accuracy of a final product.

Description of the drawings:

FIG. 1 is a view showing the construction of the outer appearance of the present invention;

FIG. 2 is a view showing the construction of the entire frame of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a top view of the present invention;

FIG. 5 is an enlarged sectional view taken at a portion I in FIG. 4;

FIG. 6 is a front view of the present invention;

FIG. 7 is a sectional view taken along line A-A in FIG. 6;

FIG. 8 is a view showing a cross section B-B in FIG. 6;

FIG. 9 is a view of the cross section C-C of FIG. 6;

FIG. 10 is a view of the cross-section D-D of FIG. 7;

FIG. 11 is a view of the cross-section E-E of FIG. 7;

FIG. 12 is a view showing a cross section F-F in FIG. 8;

FIG. 13 is a sectional view taken along line G-G in FIG. 8;

FIG. 14 is a view showing a structure of a section H-H in FIG. 8;

FIG. 15 is an enlarged view of a portion II of FIG. 8;

FIG. 16 is a view showing the external appearance of the back support elbow and the leg elbow;

FIG. 17 is a view showing the configuration of the elbow pipe of the armrest and the armrest leg;

FIG. 18 is a view of the appearance of the clamp spring part;

FIG. 19 is a view showing the appearance of the rear end cap of the armrest;

FIG. 20 is a view showing the construction of an outer appearance in elevation of example 2;

FIG. 21 is a side view structural view of embodiment 2;

FIG. 22 is an enlarged view taken at III in FIG. 21;

FIG. 23 is a diagram of a finite element stress simulation stress analysis result of a seat frame according to the present invention;

FIG. 24 is a diagram of a finite element stress simulated strain analysis result of a seat frame in accordance with the present invention;

FIG. 25 is a diagram of the results of stress analysis of finite element stress simulation of the back frame of the present invention;

FIG. 26 is a diagram of the results of a stress simulation strain analysis of finite elements of the back frame according to the present invention;

the number designations in the figures are: 1. a backrest support elbow; 2. a backrest frame; 21. a backrest rail; 22. a backrest frame insert; 23. a back frame set square; 3. a seat leg elbow; 4. a seat frame; 41. a seat frame insert core; 42. a seat frame triangle; 5. elbow pipes of the armrest legs; 51. elbow pipe triangular plates of the armrest legs; 6. a handrail; 61. an outer handrail profile; 62. an inner rod section bar of the handrail; 63. a front end cover of the handrail; 64. a middle end cover of the handrail; 65. a handrail rear end cover; 66. a clamp spring; 7. a seat cushion; 8. a backrest cushion; 9. a middle armrest; 91. and a middle handrail end cap.

Detailed Description

Example 1

A plurality of seat leg bent pipes 3 and armrest leg bent pipes 5 are fixedly connected with the ground, the horizontal part of a backrest support bent pipe 1 is fixed above the seat leg bent pipes 3, a seat frame 4 is fixed on the horizontal part of the seat leg bent pipes 3, and a backrest frame 2 is fixed on a backrest inclined part of the backrest support bent pipe 1; the elbow pipe 5 of the armrest leg is fixed with the two sides of the seat frame 4, and the armrest 6 is arranged above the elbow pipe 5 of the armrest leg;

a backrest cross rod 21 is arranged at the middle upper part of the backrest frame 2;

the end part of the horizontal part of the backrest support bent pipe 1 is connected with the seat frame 4 by adopting a sleeve-top tenon-and-mortise structure, the middle part of the backrest support bent pipe is connected by adopting a tenon-and-mortise structure, the groove of the section bar of the backrest support bent pipe 1 corresponds to the groove of the section bar of the seat frame 4 in position, and the joint groove of the two is embedded with a seat frame triangular plate 42 for firm welding;

the end part of the back inclined part of the backrest support bent pipe 1 is connected with the backrest cross rod 21 by adopting a sleeve top tenon-and-mortise structure, the middle part of the backrest support bent pipe is connected with the backrest frame 2 by adopting a tenon-and-mortise structure, the groove of the section of the backrest support bent pipe 1 corresponds to the positions of the groove of the section of the backrest cross rod 21 and the section of the backrest frame 2, and the triangular plate 23 of the backrest frame is embedded at the groove part where every two are connected for welding firmly;

the middle part of the elbow pipe 5 of the armrest leg is connected with the seat frame 4 by adopting a half-groove lap joint tenon-and-mortise structure, the end part of the elbow pipe 5 of the armrest leg is connected with the outer armrest profile 61 by adopting a sleeve-top tenon-and-mortise structure, the groove of the profile of the elbow pipe 5 of the armrest leg corresponds to the groove of the outer armrest profile 61, and an elbow pipe triangle plate 51 of the armrest leg is embedded in the joint groove of the two for firm welding;

the outer handrail section 61 is of an upper and lower double-cavity structure, the upper cavity is provided with a handrail inner rod section 62 which can freely stretch, the front end of the outer handrail section 61 is sealed with a handrail middle end cover 64, the rear end of the outer handrail section 61 is sealed with a handrail rear end cover 65, and the front end of the handrail inner rod section 62 is sealed with a handrail front end cover 63;

a snap spring 66 is fixed on a horizontal inner rib at the front end of the cavity of the outer handrail section 61, and the upwarping tail of the snap spring 66 is in contact with the lower surface of the inner handrail section 62;

the backrest frame 2 is formed by butting two C-shaped sectional materials, and a backrest frame inserting core 22 is arranged at the butting position for fixed splicing;

the seat frame 4 is formed by butting two C-shaped sectional materials, and a seat frame insertion core 41 is arranged at the butting position for fixed insertion;

the seat frame 4 is fixed with a seat cushion 7, and the backrest frame 2 is fixed with a backrest cushion 8.

Example 2

The difference from example 1 is that: a seat cushion 7 is fixed on the seat frame 4, a backrest cushion 8 is fixed on the backrest frame 2, and the middle parts of the seat cushion 7 and the backrest cushion 8 are respectively fixed at two end parts of a plurality of middle armrests 9 through middle armrest end caps 91; bolts are inserted through the seat cushion 7 or the back cushion 8 and anchored into the threaded holes of the middle armrest end cap 91, thereby fixing the middle armrest 9 to the seat.

Application examples

The aluminum profiles are all manufactured by using 6005A-T6 materials, the total length of the seat is 170cm, the total width is 55cm, the total height is 95cm, the total aluminum consumption is 17kg, and the following data are obtained by testing:

constraint conditions are as follows: all degrees of freedom of connecting points of the seat legs, the seat armrest legs and the white body are restrained;

the reference national standard: GBT 6892 general Industrial extruded aluminum and aluminum alloy sections;

loading under stress: simulated loading of a four-person weight of 300kg (75 x 4) on a seat cushion;

2. the backrest is loaded with half of the mass of four persons, and the mass is multiplied by the starting acceleration of 0.5G, 750N;

as can be seen from fig. 20: the maximum stress point of the seat frame assembly is 19.75MPa, which is far less than the standard yield strength of 6005A-T6 national standard 215 MPa;

as can be seen from fig. 21: the maximum deflection of the seat frame assembly after being stressed is 0.65 mm; the deformation is 0.04% of the length of the seat frame, according to the stress-strain curve of the aluminum alloy, the seat frame only generates tiny elastic deformation deflection, and the whole seat frame does not generate any permanent deformation;

as shown in fig. 22: the maximum stress point of the backrest frame component is 31.5MPa, which is far less than the standard yield strength of 6005A-T6 national standard 215 MPa;

as shown in fig. 23: the maximum deflection of the backrest frame assembly after being stressed is 2.9mm, and the deformation amount is 0.15 percent of the length of the seat frame; according to the stress-strain curve of the aluminum alloy, the seat frame only undergoes slight elastic deformation and deflection, and the whole seat frame does not undergo any permanent deformation.

Claims (10)

1. Full aluminium mortise type handrail seat that stretches out and draws back, its characterized in that: the seat leg bent pipes (3) and the armrest leg bent pipes (5) are fixedly connected with the ground, the horizontal part of the backrest support bent pipe (1) is fixed above the seat leg bent pipes (3), the seat frame (4) is fixed on the horizontal part of the seat leg bent pipes (3), and the backrest frame (2) is fixed on the back inclined part of the backrest support bent pipe (1); the elbow pipe (5) of the armrest leg is fixed with the two sides of the seat frame (4), and the armrest (6) is arranged above the elbow pipe (5) of the armrest leg.

2. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the middle upper part of the backrest frame (2) is provided with a backrest cross rod (21).

3. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the end part of the horizontal part of the backrest supporting bent pipe (1) is connected with the seat frame (4) by adopting a sleeve-top tenon-and-mortise structure, the middle part of the backrest supporting bent pipe is connected by adopting a penetrating tenon structure, the groove of the profile of the backrest supporting bent pipe (1) corresponds to the groove of the profile of the seat frame (4), and the joint groove of the backrest supporting bent pipe and the profile of the seat frame is embedded with a seat frame triangular plate (42) for firm welding.

4. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 2, wherein: adopt cover top tenon fourth of twelve earthly branches structural connection between back slope tip and the back horizontal pole (21) of return bend (1) is supported to the back, and the middle part adopts with back frame (2) to wear tenon structural connection, and the recess of back support return bend (1) section bar corresponds with back horizontal pole (21), the groove position of back frame (2) section bar, and two liang of groove sets that meet inlay back frame set-square (23) and weld firmly.

5. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the middle part of the elbow pipe (5) of the armrest leg is connected with the seat frame (4) by a half-groove lap joint mortise-tenon structure, the end part of the elbow pipe (5) of the armrest leg is connected with the outer armrest section bar (61) by a sleeve top mortise-tenon structure, the groove of the elbow pipe (5) of the armrest leg corresponds to the groove of the outer armrest section bar (61), and the triangular plate (51) of the elbow pipe of the armrest leg is embedded in the joint groove of the elbow pipe of the armrest leg and the outer armrest section bar for firm welding.

6. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the outer handrail section bar (61) is of an upper and lower double-cavity structure, the upper cavity is provided with a handrail inner rod section bar (62) which can freely stretch out and draw back, the front end of the outer handrail section bar (61) is covered with a handrail middle end cover (64), the rear end of the outer handrail section bar (61) is covered with a handrail rear end cover (65), and the front end of the handrail inner rod section bar (62) is covered with a handrail front end cover (63).

7. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 5, wherein: the clamp spring (66) is fixed on the horizontal inner rib at the front end of the cavity of the outer handrail section bar (61), the upwarping tail of the clamp spring (66) is in contact with the lower surface of the handrail inner rod section bar (62), and the tail end of the lower surface of the handrail inner rod section bar (62) is provided with a limiting hole.

8. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the backrest frame (2) is formed by butting two C-shaped sectional materials, and a backrest frame inserting core (22) is arranged at the butting position to be fixedly inserted.

9. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the seat frame (4) is formed by butting two C-shaped sectional materials, and a seat frame inserting core (41) is arranged at the butting position for fixed splicing.

10. The all-aluminum mortise and tenon type telescopic armrest seat according to claim 1, wherein: the seat frame (4) is fixed with a seat cushion (7), the backrest frame (2) is fixed with a backrest cushion (8), and the middle parts of the seat cushion (7) and the backrest cushion (8) are respectively fixed with two end parts of a plurality of middle armrests (9) through middle armrest end caps (91).

Images