CN112793609A - Aluminum alloy handrail with reinforcing structure and preparation method thereof - Google Patents
Aluminum alloy handrail with reinforcing structure and preparation method thereof Download PDFInfo
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- CN112793609A CN112793609A CN202110117514.5A CN202110117514A CN112793609A CN 112793609 A CN112793609 A CN 112793609A CN 202110117514 A CN202110117514 A CN 202110117514A CN 112793609 A CN112793609 A CN 112793609A
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- aluminum alloy
- limiting ring
- ring seat
- reinforcing structure
- handrail
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D49/00—Other details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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- Mechanical Engineering (AREA)
- Transportation (AREA)
- Steps, Ramps, And Handrails (AREA)
Abstract
The invention discloses an aluminum alloy handrail with a reinforcing structure and a preparation method thereof, the aluminum alloy handrail comprises a stand column, an upper limiting ring seat and a lower limiting ring seat, the upper limiting ring seat and the lower limiting ring seat have the same structure, a clamping ring is arranged at the center, a carriage top frame plate and a carriage bottom frame plate are respectively provided with a mounting ring, the bottom end of the mounting ring is inwards provided with a waist-shaped sliding groove, the inner end of the waist-shaped sliding groove is provided with a circular locking groove, the outer side of the mounting ring is provided with a fastening groove in a penetrating manner, the upper limiting ring seat and the lower limiting ring seat are respectively provided with a rotating groove, a rotating shaft with an end head is limited in the rotating groove in a rotating manner, a waist-shaped locking block is fixed at the top end of the rotating shaft. The invention has rich functions, and the upright post of the invention can be used as a handrail and can be penetrated by a cable and a safety rope, thereby facilitating the circuit layout of the carriage; meanwhile, the low-temperature heater is arranged in the seat body, so that the upright post can be heated, and the comfort level of the passenger in holding, especially in holding for a long time, can be improved when the air temperature is low.
Description
Technical Field
The invention relates to the technical field of aluminum alloy products, in particular to an aluminum alloy handrail with a reinforcing structure and a preparation method thereof.
Background
The aluminum and aluminum alloy processing industry enters a brand-new high-speed development period, the application of the aluminum material is more and more extensive, and the transportation industry becomes the first major user of the aluminum material. Aluminum materials are the first choice materials for light weight, and inevitably partially replace steel and become important basic materials in all aspects of national economy departments and people's life. The urban rail train is a rapid and large-traffic rail vehicle running in the city, has excellent capability of dredging passenger flow, and the interior decoration and equipment of the vehicle are arranged according to the passenger flow. In order to improve the passenger transport capacity and adapt to the characteristics of short distance and large transport capacity of rail transit, only seats and armrests are arranged in the vehicle, so that the armrests are important built-in components in urban rail vehicles. When the vehicle is started, stopped and emergently braked normally, the handrail plays the effect of keeping the passenger stand balanced and alleviating the passenger fatigue, and the layout and the structural style are various. In the peak period of passenger flow, the quantity of passengers grabbed on the grab bar of the middle upright post is large, so that the grab bar bears large impact force. Therefore, in the structural design of the handrail, the strength and rigidity of the handrail rod are mainly considered, and the handrail rod is required to meet a certain static load without generating problems of permanent deformation, fracture and the like.
The aluminum alloy handrail rod is less applied in the field of urban rail vehicles in China, and the main reasons are that the mechanical property of common industrial aluminum alloy is weaker than that of stainless steel, and the surface treatment is difficult. In the existing urban rail vehicle, the aluminum alloy handrail is subjected to surface treatment by adopting anodic oxidation. But aluminum alloys have incomparable advantages over stainless steel: light weight and easy molding.
There are a great deal of weak points when current subway pole setting handrail uses, firstly can not regard as the wear to establish the pipe box of cable, secondly also does not have the heating function, and the comfort level that the passenger gripped when temperature is lower is relatively poor, and thirdly can not install and remove fast, and then is unfavorable for quick maintenance. Therefore, optimization improvements are needed.
Disclosure of Invention
The present invention is directed to overcoming at least one of the above problems in the conventional art and providing an aluminum alloy handrail with a reinforcing structure and a method for manufacturing the same.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
an aluminum alloy handrail with a reinforcing structure comprises a stand column, an upper limiting ring seat and a lower limiting ring seat, wherein the upper limiting ring seat is used for being fixed with a carriage top frame plate, the lower limiting ring seat is used for being fixed with a carriage bottom frame plate, the upper limiting ring seat and the lower limiting ring seat are identical in structure, a clamping ring matched with the outer diameter of the stand column is arranged at the center of each upper limiting ring seat and the center of each lower limiting ring seat, a mounting ring is arranged on each of the carriage top frame plate and the carriage bottom frame plate, the inner diameter of the mounting ring is matched with the outer diameter of the clamping ring, a plurality of waist-shaped sliding grooves are formed in the bottom end of the mounting ring inwards along the circumferential direction, circular locking grooves with the center points overlapped with each other are formed in the inner ends of the waist-shaped sliding grooves, the length of each waist-shaped sliding groove is equal to the outer diameter of the circular locking groove, fastening grooves communicated with the waist-shaped sliding grooves, the rotary groove is internally limited by a rotary shaft with an end head in a rotating manner, a waist-shaped locking block matched with the waist-shaped sliding groove in shape is fixed at the top end of the rotary shaft, a fastening hole is formed in the side end of the rotary shaft, a fastening screw is screwed in the fastening groove and can be screwed inwards and pushed into the fastening hole in the side end of the rotary shaft, and the position of the rotary shaft is fixed.
Further, in the above aluminum alloy handrail with the reinforcing structure, the upright column includes an outer ring, and an inner ring, a first partition plate, an arc-shaped plate and a second partition plate which are arranged in the outer ring, the axes of the outer ring and the inner ring are overlapped, and a plurality of first partition plates are connected between the inner wall of the outer ring and the outer wall of the inner ring, the inner cavity of the inner ring is used as a heating zone for installing the low-temperature heater, two adjacent first partition plates, the outer ring and the inner ring jointly enclose a heat insulation zone, and the wall part of the outer ring located at the heat insulation zone, the arc-shaped plate and the second partition plates located at two sides of the arc-shaped plate jointly enclose a penetrating zone for penetrating.
Furthermore, in the aluminum alloy handrail with the reinforcing structure, the outer ring, the inner ring, the first partition plate, the arc-shaped plate and the second partition plate are equal in thickness, and the thickness is 4-12 mm.
Further, in the aluminum alloy handrail with the reinforcing structure, the thickness of the waist-shaped locking block is equal to that of the circular locking groove, and the thickness of the waist-shaped sliding groove is greater than or equal to that of the circular locking groove.
Further, in the aluminum alloy handrail with the reinforcing structure, the number of the first partition plates is four, and the included angle between every two adjacent first partition plates is 90 degrees.
Further, in the aluminum alloy handrail with the reinforcing structure, the rotating grooves are T-shaped smooth holes, and the fastening grooves are T-shaped threaded holes.
Further, in the above aluminum alloy handrail with a reinforcing structure, the peripheries of the upper limit ring seat and the lower limit ring seat are provided with fillets.
Furthermore, in the aluminum alloy handrail with the reinforcing structure, the upright post is integrally formed by extruding an aluminum alloy material and then cut; the upper limiting ring seat and the lower limiting ring seat are formed by die-casting aluminum alloy materials.
Further, in the aluminum alloy handrail with the reinforcing structure, the preparation method of the aluminum alloy handrail comprises the following steps:
1) preheating a squeezing barrel of extrusion forming equipment to 450-460 ℃, uniformly heating an aluminum bar to 480-500 ℃, feeding the aluminum bar into the squeezing barrel of an extruder, and extruding an aluminum profile through a discharge port of an extrusion die head; cutting the aluminum profile, performing sand blasting treatment on the outer surface of a cutting workpiece, hanging the cutting workpiece on a mounting frame of a sand blasting machine, performing sand blasting by using steel shots, then inverting and then hanging the hung cutting workpiece again, performing sand blasting again, and performing air blasting treatment on the interior of a heating area and a heat insulation area by using a blower after the sand blasting is finished; then, performing natural-color anodic oxidation treatment on the inner and outer surfaces of the sectioned workpiece, mounting the sectioned workpiece on a hanging rack, then removing oil, performing alkaline washing by using sodium hydroxide, neutralizing by using nitric acid to remove a surface black film completely, and drying to obtain an upright post;
2) smelting the die-casting aluminum alloy raw and auxiliary materials at the smelting temperature of 650-700 ℃; after deslagging and exhaust treatment, heating to 750-800 ℃ for modification treatment, standing for 3-4 hours after modification, and die-casting to obtain an upper limit ring seat and a lower limit ring seat;
3) the upper and lower limiting ring seats are sleeved on the upright post, the low-temperature heater, the cable and the safety rope are arranged in the upright post, and then the upper and lower limiting ring seats are arranged on the corresponding carriage top frame plate or carriage bottom frame plate by utilizing the rotating shaft with the end head and the fastening screw rod to complete the assembly.
Further, in the step 1), the aluminum alloy handrail with the reinforcing structure is slowly and uniformly extruded in the extrusion process, wherein the extrusion speed is 2-3m/s, and the uniform pressure is 6-8 Mpa.
The invention has the beneficial effects that:
1. the aluminum alloy handrail provided by the invention has reasonable structural design, the upright post is fixed with the corresponding carriage frame plate through the limiting ring seat, the waist-shaped locking block enters the circular locking groove through the waist-shaped sliding groove during fixing, then the waist-shaped locking block is rotated by 90 degrees, and then the fastening screw is screwed in from the outer side and is pushed into the fastening hole, so that the fixing operation is completed, the reverse operation is only needed when the handrail needs to be disassembled, and the assembly and disassembly operation is convenient; the aluminum alloy handrail has excellent structural performance, fully exerts the advantages of light weight and easy forming of the aluminum alloy material, and expands the application range of the aluminum alloy material.
2. The aluminum alloy handrail provided by the invention has rich functions, and the upright columns can be used as the handrail and can be penetrated with cables and safety ropes, so that the circuit layout of a carriage is facilitated; meanwhile, the low-temperature heater is arranged in the seat body, so that the upright post can be heated, and the comfort level of the passenger in holding, especially in holding for a long time, can be improved when the air temperature is low.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic cross-sectional view of a column according to the present invention;
FIG. 3 is a first schematic diagram of the present invention;
FIG. 4 is a schematic diagram of the second embodiment of the present invention;
FIG. 5 is a schematic view of the position of the kidney lock according to the present invention;
FIG. 6 is a schematic view of the position of the kidney lock piece when unlocked in accordance with the present invention;
FIG. 7 is a schematic bottom view of the upper retainer ring of the present invention;
FIG. 8 is a schematic top view of the upper retainer ring of the present invention;
in the drawings, the parts are numbered as follows:
1-upright column, 2-upper limit ring seat, 3-carriage top frame plate, 4-lower limit ring seat, 5-carriage bottom frame plate, 6-snap ring, 7-mounting ring, 8-kidney-shaped sliding groove, 9-circular locking groove, 10-fastening groove, 11-rotary groove, 12-rotary shaft, 13-kidney-shaped locking block and 14-fastening screw rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present embodiment is an aluminum alloy handrail with a reinforcing structure, which includes an upright post 1, an upper retainer ring seat 2 for fixing with a car roof frame plate 3, and a lower retainer ring seat 4 for fixing with a car bottom frame plate 5. The upper limit ring seat 2 and the lower limit ring seat 3 have the same structure, and the respective centers are provided with snap rings 6 which are matched with the outer diameter of the upright post 1. The top frame plate 3 and the bottom frame plate 5 of the carriage of the urban rail train are respectively provided with a mounting ring 7, and the inner diameter of the mounting ring 7 is matched with the outer diameter of the snap ring 6.
In this embodiment, the bottom end of the mounting ring 7 is provided with a plurality of kidney-shaped sliding grooves 8 along the circumferential direction, the inner ends of the kidney-shaped sliding grooves 8 are provided with circular locking grooves 9 with center points overlapped with each other, and the length of the kidney-shaped sliding grooves 8 is equal to the outer diameter of the circular locking grooves 9. The outer side of the mounting ring 7 is provided with a fastening groove 10 communicated with the kidney-shaped sliding groove 8 in a penetrating manner, the upper limiting ring seat 2 and the lower limiting ring seat 3 are respectively provided with a rotating groove 11 matched with the kidney-shaped sliding groove 8 in position, a rotating shaft 12 with an end is limited in rotation in the rotating groove 11, and a kidney-shaped locking block 13 matched with the kidney-shaped sliding groove 8 in shape is fixed at the top end of the rotating shaft 12. The side end of the rotating shaft 12 is provided with a fastening hole, a fastening screw 14 is screwed in the fastening groove 10, and the fastening screw 14 can be screwed inwards and pushed into the fastening hole at the side end of the rotating shaft 12 to fix the position of the rotating shaft 12. The rotating groove 11 is a T-shaped smooth hole, and the fastening groove 10 is a T-shaped threaded hole. The end outside of 12 bottoms on pivot is equipped with the hexagonal groove, and the hexagonal spanner of being convenient for installs fast.
In this embodiment, the column 1 includes an outer ring 101, and an inner ring 102, a first partition plate 103, an arc-shaped plate 104, and a second partition plate 105 that are disposed inside the outer ring 101, the axes of the outer ring 101 and the inner ring 102 are overlapped, and four first partition plates 103 are connected between the inner wall of the outer ring 101 and the outer wall of the inner ring 102, and an included angle between two adjacent first partition plates is 90 degrees. The inner cavity of the inner ring 102 serves as a heating area for installing the low-temperature heater, two adjacent first partition plates 103, the outer ring 1 and the inner ring 2 jointly enclose a heat insulation area, and the wall part of the outer ring, which is located at the heat insulation area, and the arc-shaped plate and the second partition plates located on two sides of the arc-shaped plate jointly enclose a penetrating area for penetrating a cable or a safety rope.
In this embodiment, the outer ring 101, the inner ring 102, the first partition plate 103, the arc-shaped plate 104 and the second partition plate 105 have the same thickness, and the thickness is 4-12 mm. The thickness of the kidney-shaped locking block 13 is equal to that of the circular locking groove 9, and the thickness of the kidney-shaped sliding groove 8 is larger than or equal to that of the circular locking groove 9.
In this embodiment, go up spacing ring holder 2, the periphery of spacing ring holder 4 is equipped with the fillet down, avoids causing the injury to the passenger.
In the embodiment, the upright post 1 is integrally formed by extruding an aluminum alloy material and then cut; the upper limit ring seat 2 and the lower limit ring seat 4 are formed by die-casting aluminum alloy materials.
One specific application of this embodiment is: the aluminum alloy handrail provided by the embodiment is reasonable in structural design, the upright post 1 is fixed with a corresponding carriage frame plate through the limiting ring seat, the waist-shaped locking block enters the circular locking groove 9 through the waist-shaped sliding groove 8 during fixing, then the waist-shaped locking block 13 is rotated by 90 degrees, and then the fastening screw 14 is screwed in from the outer side and is pushed into the fastening hole, so that the fixing operation is completed, the reverse operation is required when the handrail is disassembled, and the assembly and disassembly operation are convenient; the aluminum alloy handrail has excellent structural performance, fully exerts the advantages of light weight and easy forming of the aluminum alloy material, and expands the application range of the aluminum alloy material. The aluminum alloy handrail provided by the embodiment has rich functions, and the upright column 1 can be used as a handrail and can be penetrated with a cable and a safety rope, so that the circuit layout of a carriage is facilitated; meanwhile, the low-temperature heater is arranged in the seat body, so that the upright post can be heated, and the comfort level of the passenger in holding, especially in holding for a long time, can be improved when the air temperature is low.
Example two
The embodiment is a preparation method of an aluminum alloy handrail with a reinforcing structure, which comprises the following steps:
1) preheating an extrusion barrel of extrusion forming equipment to 450-460 ℃, uniformly heating an aluminum bar to 480-500 ℃, feeding the aluminum bar into the extrusion barrel of an extruder, uniformly extruding at a low speed of 2-3m/s and a uniform pressure of 6-8 Mpa in the extrusion process, extruding an aluminum profile through a discharge port of an extrusion die head, wherein the shape of the discharge port of the extrusion die head is matched with the cross section shape of a stand column product; cutting the aluminum profile, performing sand blasting treatment on the outer surface of a cutting workpiece, hanging the cutting workpiece on a mounting frame of a sand blasting machine, performing sand blasting by using steel shots, then inverting and then hanging the hung cutting workpiece again, performing sand blasting again, and performing air blasting treatment on the interior of a heating area and a heat insulation area by using a blower after the sand blasting is finished; then, performing natural-color anodic oxidation treatment on the inner and outer surfaces of the sectioned workpiece, mounting the sectioned workpiece on a hanging rack, then removing oil, performing alkaline washing by using sodium hydroxide, neutralizing by using nitric acid to remove a surface black film completely, and drying to obtain an upright post;
2) smelting the die-casting aluminum alloy raw and auxiliary materials at the smelting temperature of 650-700 ℃; after deslagging and exhaust treatment, heating to 750-800 ℃ for modification treatment, standing for 3-4 hours after modification, and die-casting to obtain an upper limit ring seat and a lower limit ring seat;
3) the upper and lower limiting ring seats are sleeved on the upright post, the low-temperature heater, the cable and the safety rope are arranged in the upright post, and then the upper and lower limiting ring seats are arranged on the corresponding carriage top frame plate or carriage bottom frame plate by utilizing the rotating shaft with the end head and the fastening screw rod to complete the assembly.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. The utility model provides a take additional strengthening's aluminum alloy handrail which characterized in that: the aluminum alloy handrail comprises a stand column, an upper limiting ring seat and a lower limiting ring seat, wherein the upper limiting ring seat is used for being fixed with a carriage top frame plate, the lower limiting ring seat is used for being fixed with a carriage bottom frame plate, the upper limiting ring seat and the lower limiting ring seat are identical in structure, a clamping ring matched with the outer diameter of the stand column is arranged at the center of each upper limiting ring seat, each carriage top frame plate and the carriage bottom frame plate are respectively provided with a mounting ring, the inner diameter of each mounting ring is matched with the outer diameter of the corresponding clamping ring, a plurality of kidney-shaped sliding grooves are formed in the bottom end of each mounting ring along the circumferential direction, circular locking grooves with the center points overlapped with each other are formed in the inner ends of the kidney-shaped sliding grooves, the length of each kidney-shaped sliding groove is equal to the outer diameter of the circular locking groove, fastening grooves communicated with the kidney-shaped sliding grooves are formed in the outer sides of the mounting rings in a penetrating manner, rotating grooves matched, the top end of the rotating shaft is fixedly provided with a waist-shaped locking block matched with the waist-shaped sliding groove in shape, a fastening hole is formed in the side end of the rotating shaft, a fastening screw rod is screwed in the fastening groove, and the fastening screw rod can be screwed inwards and pushed into the fastening hole in the side end of the rotating shaft to fix the position of the rotating shaft.
2. The aluminum alloy handrail with a reinforcing structure of claim 1, wherein: the stand includes the outer lane and locates inner circle, first baffle, arc and the second baffle in it, the axis coincidence of outer lane and inner circle, and be connected with a plurality of first baffles between the inner wall of outer lane, the outer wall of inner circle, the heating zone that the inner chamber of inner circle was used as installation low temperature heater, and two adjacent first baffles and outer lane, inner circle enclose jointly and become to have the heat-insulating area, the outer lane is located the wall portion and the arc of heat-insulating area department, is located the second baffle of arc both sides and encloses jointly and is enclosed the district of establishing of wearing to be used for wearing to establish cable or safety rope.
3. The aluminum alloy handrail with a reinforcing structure of claim 2, wherein: the outer ring, the inner ring, the first partition plate, the arc-shaped plate and the second partition plate are equal in thickness, and the thickness is 4-12 mm.
4. The aluminum alloy handrail with a reinforcing structure of claim 2, wherein: the thickness of waist shape locking piece equals the thickness of circular locked groove, the thickness of waist shape spout is greater than or equal to the thickness of circular locked groove.
5. The aluminum alloy handrail with a reinforcing structure of claim 2, wherein: the first baffle is equipped with four altogether, and the contained angle between two adjacent first baffles is 90 degrees.
6. The aluminum alloy handrail with a reinforcing structure of claim 2, wherein: the rotating groove is a T-shaped smooth hole, and the fastening groove is a T-shaped threaded hole.
7. The aluminum alloy handrail with a reinforcing structure of claim 1, wherein: and the peripheries of the upper limiting ring seat and the lower limiting ring seat are provided with fillets.
8. The aluminum alloy handrail with a reinforcing structure of claim 1, wherein: the upright post is integrally formed by extruding an aluminum alloy material and then cut into pieces; the upper limiting ring seat and the lower limiting ring seat are formed by die-casting aluminum alloy materials.
9. The aluminum alloy handrail with a reinforcing structure of claim 1, wherein the preparation method of the aluminum alloy handrail comprises the following steps:
1) preheating a squeezing barrel of extrusion forming equipment to 450-460 ℃, uniformly heating an aluminum bar to 480-500 ℃, feeding the aluminum bar into the squeezing barrel of an extruder, and extruding an aluminum profile through a discharge port of an extrusion die head; cutting the aluminum profile, performing sand blasting treatment on the outer surface of a cutting workpiece, hanging the cutting workpiece on a mounting frame of a sand blasting machine, performing sand blasting by using steel shots, then inverting and then hanging the hung cutting workpiece again, performing sand blasting again, and performing air blasting treatment on the interior of a heating area and a heat insulation area by using a blower after the sand blasting is finished; then, performing natural-color anodic oxidation treatment on the inner and outer surfaces of the sectioned workpiece, mounting the sectioned workpiece on a hanging rack, then removing oil, performing alkaline washing by using sodium hydroxide, neutralizing by using nitric acid to remove a surface black film completely, and drying to obtain an upright post;
2) smelting the die-casting aluminum alloy raw and auxiliary materials at the smelting temperature of 650-700 ℃; after deslagging and exhaust treatment, heating to 750-800 ℃ for modification treatment, standing for 3-4 hours after modification, and die-casting to obtain an upper limit ring seat and a lower limit ring seat;
3) the upper and lower limiting ring seats are sleeved on the upright post, the low-temperature heater, the cable and the safety rope are arranged in the upright post, and then the upper and lower limiting ring seats are arranged on the corresponding carriage top frame plate or carriage bottom frame plate by utilizing the rotating shaft with the end head and the fastening screw rod to complete the assembly.
10. The aluminum alloy handrail with a reinforcing structure of claim 9, wherein: in the step 1), the extrusion is carried out uniformly at a low speed in the extrusion process, wherein the extrusion speed is 2-3m/s, and the uniform pressure is 6-8 Mpa.
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| CN202110117514.5A CN112793609B (en) | 2021-01-28 | 2021-01-28 | Aluminum alloy handrail with reinforcing structure and preparation method thereof |
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| CN208347173U (en) * | 2018-06-20 | 2019-01-08 | 青岛四方川崎车辆技术有限公司 | A kind of fixed device of adjustable cylinder |
| CN109178007A (en) * | 2018-08-21 | 2019-01-11 | 中车大连机车车辆有限公司 | Handrail mounting device and vehicle |
| CN209479665U (en) * | 2018-12-12 | 2019-10-11 | 中车唐山机车车辆有限公司 | The mounting device of vehicle armrest |
| CN211918664U (en) * | 2020-04-17 | 2020-11-13 | 涂杰 | Supporting assembly for improving utilization rate of subway handrail |
| CN111842535A (en) * | 2020-07-25 | 2020-10-30 | 江苏顺丰铝业有限公司 | Manufacturing process of aluminum alloy handrail |
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