CN115653993A - Straight shaft, forming process thereof and application thereof in office automation equipment - Google Patents
Straight shaft, forming process thereof and application thereof in office automation equipment Download PDFInfo
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- CN115653993A CN115653993A CN202211301942.4A CN202211301942A CN115653993A CN 115653993 A CN115653993 A CN 115653993A CN 202211301942 A CN202211301942 A CN 202211301942A CN 115653993 A CN115653993 A CN 115653993A
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- shaft
- straight
- metal
- straight shaft
- butt joint
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 64
- 229910052751 metal Inorganic materials 0.000 claims abstract description 64
- 238000001746 injection moulding Methods 0.000 claims abstract description 7
- 210000001503 joint Anatomy 0.000 claims description 17
- 238000005452 bending Methods 0.000 claims description 10
- 239000003365 glass fiber Substances 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 5
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 5
- 238000009713 electroplating Methods 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 239000012994 photoredox catalyst Substances 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 2
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- 239000000463 material Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000007747 plating Methods 0.000 description 8
- 229910052759 nickel Inorganic materials 0.000 description 6
- 239000002699 waste material Substances 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 238000009628 steelmaking Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000010887 waste solvent Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ocean & Marine Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a straight shaft, a forming process thereof and application in office automation equipment, wherein the straight shaft comprises a shaft body, the shaft body is formed by injection molding, shaft end butt-joint holes are formed at the end parts of two shafts, the straight shaft also comprises metal shaft heads which are respectively concentric and inserted in the two shaft end butt-joint holes in an interference fit manner, and the length-diameter ratio of the shaft body is 20-40: 1, the axial tensile strength of a straight shaft formed by splicing the metal shaft heads is more than 100N/mm < 2 >; the torsional strength is more than 10kg.cm. The invention forms the straight shaft with the same use performance as the metal shaft through the combination of the injection molded shaft body and the metal shaft head, thereby not only greatly reducing the manufacturing cost, but also greatly lightening the self weight, and simultaneously eliminating adverse factors caused by materials and processes, such as pollution, resource shortage, large energy consumption, large processing difficulty coefficient and the like.
Description
Technical Field
The invention belongs to the field of office automation equipment, and particularly relates to a straight shaft, a forming process of the straight shaft and application of the straight shaft in office automation equipment.
Background
Currently, office automation equipment in common use, for example: articles such as copiers, printers, scanners, plotters, multifunctional integrated machines and the like all relate to a straight shaft, and the straight shaft refers to a shaft with a straight axis. According to different loads on a straight shaft, the straight shaft can be divided into a rotating shaft, a transmission shaft and a mandrel, and meanwhile, due to the requirements of strength, axial degree (coaxiality and concentricity), tensile strength, torsional strength and the like of the straight shaft, more metals are generally adopted, and more than 99% of the straight shaft uses low-carbon steel (surface nickel plating is needed) or stainless steel, so that the straight shaft has the following defects:
1. from the material aspect
1) The method needs precise cold-drawn sections, has high technical requirements, has less upstream coiled materials and downstream drawing manufacturers (the domestic concentration is in east China and south China, and the foreign concentration is in Japan and Korean), and has high manufacturing cost;
2) Because all the materials are metal and have heavier dead weight, if the office automation equipment has a plurality of straight shafts, the whole weight is inevitably increased;
3) The price of steel is greatly influenced by the international price of iron ore and regional political factors, the environmental load in the production process of steelmaking is large, the power consumption of steel machining equipment is large, and the total energy consumption is serious;
2. from the aspect of processing
1) Because most of materials adopt low-carbon steel, in order to prevent rusting, the production process needs rust prevention treatment, and the surface of a product needs nickel plating, so that more wastes (waste metal, waste oil, waste liquid, waste solvent and the like) are produced in the production process, and the whole industry has serious environmental pollution;
2) The machining requirement is high, and especially for slender shafts, it is very difficult to meet the requirement of high precision.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an improved combined straight shaft.
Meanwhile, the invention also relates to a forming process of the straight shaft and application of the straight shaft in office automation equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a straight shaft comprises a shaft body which is formed by injection molding, shaft end butt holes are formed at two shaft end parts,the straight shaft also comprises metal shaft heads which are respectively concentric and are inserted in the butt joint holes of the two shaft ends in an interference fit manner, wherein the length-diameter ratio of the shaft body is 20-40: 1, the axial tensile strength of a straight shaft formed by splicing the metal shaft heads is more than 100N/mm 2 (ii) a The torsion strength is more than 10kg.cm.
Preferably, the length of the shaft body is L1, the length of the metal shaft head inserted into the shaft end butt hole is L2, L1= N × L2, and the value range of N is 8-20. On the premise of meeting the design requirement of the whole length, the axial tensile strength and the torsional strength of the straight shaft are ensured.
Preferably, the metal shaft head forms a step insertion part, and the step surface of the step insertion part is attached to the shaft end surface of the shaft body after assembly.
Preferably, the length of the straight axis is L, wherein L = M × L1, and M ranges from 1.1 to 1.6.
According to a specific embodiment and preferred aspect of the present invention, two shaft end abutment holes are provided through each other. Under the prerequisite of guaranteeing to reach required performance, not only can further lighten the dead weight like this, make things convenient for the shaping moreover more, further reduce cost simultaneously.
Preferably, the diameter of the through hole formed therethrough is equal to the diameter of the shaft end abutting hole.
Preferably, the diameter of the shaft end butt hole is d1, and the outer diameter of the shaft body is d2, wherein d2= n × d1, and n ranges from 1.5 to 3.0.
Preferably, the axial tensile strength of the shaft body is greater than 100N/mm 2 The torsional strength is more than 10kg.cm; and/or the total weight of the straight shaft is less than 200g; and/or the outer diameter of the straight shaft is 14mm, 12mm, 10mm, 8mm or 6mm; and/or the middle section bending deformation resistance of the straight shaft is 0.1-0.6: 4.5mm/Kg.
According to still another embodiment and preferred aspect of the present invention, the shaft body is made of one or more of glass fiber reinforced resin, ABS, PC, and nylon.
The middle shaft body is made of glass fiber reinforced resin, and raw materials, bars or pipes are easily obtained, so that the middle shaft is widely distributed in domestic industry and low in cost; light weight, high mechanical strength and easy cutting; the paint is not rusted, is not afraid of cold, hot, acid and alkali, does not need rust prevention and electroplating; the environmental pollution is less, and the industrial energy consumption and pollution are much lower than that of steel.
The other technical scheme of the invention is as follows: a forming process of a straight shaft comprises the following steps:
s1, forming of shaft body
One or more of glass fiber reinforced resin, ABS, PC and nylon are used as raw materials, injection molding is carried out, and relevant through shaft end butt joint holes are formed at two shaft end parts of a shaft body; or shaft end butt-joint holes are formed at two shaft end parts of the shaft body, and other parts of the shaft body are arranged in a solid manner;
s2, mounting of metal shaft head
The metal shaft heads are respectively arranged in the shaft end butt joint holes, and after the two metal shaft heads are inserted, the integral axial tensile strength is more than 100N/mm 2 The torsional strength is larger than 10kg.cm, and the concentricity is controlled to be 0.03-0.05.
Preferably, in S2, the metal stub shaft is knurled on the circumference of the portion located in the shaft end butt hole. The axial binding force and the torsional strength are enhanced.
Further, in S2, a metal bar is selected to be cut to form a first end and a second end, wherein the first end and the second end form a stepped insertion portion respectively, then the first end and the second end are subjected to electroplating treatment, and after a plating layer is formed, the plating layer is inserted into two shaft end butt-joint holes of the shaft body from the insertion portion respectively.
The other technical scheme of the invention is as follows: an application of the rotating shaft in office automation equipment. Office automation equipment, for example: copying machine, printer, scanner, plotter and multifunctional integrated machine.
Due to the implementation of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention forms the straight shaft with the same service performance as the metal shaft by the combination of the injection molded shaft body and the metal shaft head, thereby not only greatly reducing the manufacturing cost, but also greatly reducing the self weight, and simultaneously eliminating the adverse factors (such as pollution, resource shortage, large energy consumption, large processing difficulty coefficient and the like) caused by materials and processes.
Drawings
FIG. 1 is a schematic half-sectional view of a paper feed roller of a copying machine in embodiment 1;
FIG. 2 is a schematic half-sectional view of a paper feed roller of the copying machine in embodiment 2;
FIG. 3 is a schematic half-sectional view of a paper feed roller of the copying machine in embodiment 3;
FIG. 4 is a schematic half-sectional view of a paper feed roller of the copying machine in embodiment 4;
wherein: s, a paper feeding rubber roll; 1. a straight shaft; 10. a shaft body; 100. a hollow bore; 100a, shaft end butt joint holes; 11. a metal shaft head; l, a left metal shaft head; r, a right metal shaft head; 110. a built-in portion; 111. an exposed portion; 2. rubber roller.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Example 1
As shown in fig. 1, the straight shaft according to the present embodiment is used for a paper feeding roller of a copy, and the paper feeding roller S includes a straight shaft 1 and a rubber roller 2 disposed on the straight shaft 1.
The straight shaft 1 comprises a shaft body 10 and two metal shaft heads 11.
The shaft body 10 is made of glass fiber reinforced resin and is formed by injection molding.
Specifically, a hollow hole 100 with two through ends is formed in the middle of the shaft body 10, wherein two shaft ends corresponding to the hollow hole 100 are shaft end butting holes 100a, and the bore diameter of the hollow hole 100 is equal to the bore diameter of the shaft end butting hole 100 a.
In this example, the length of the straight shaft 1 is 387.2mm.
The length of the shaft body 10 is 293.7mm, the outer diameter is 10mm, the length-diameter ratio of the shaft body 10 is 29.37, and the axial tensile strength of the shaft body 10 is 108N/mm 2 And the torsional strength is 10.7kg.cm.
The diameter of the shaft end butt joint hole 100a is 6mm.
In this example, there are two metal axle heads 11, which are a left metal axle head L and a right metal axle head R, wherein the lengths of the left metal axle head L and the right metal axle head R are different, but the lengths of the left metal axle head L and the right metal axle head R inserted into the axle end butt-joint hole 100a are equal and both are 20mm.
The length of the left metal shaft head L is 52.75mm, the outer diameter of the left metal shaft head L is 8mm, the left metal shaft head L is provided with an internal part 110 and an exposed part 111 after being inserted, wherein the length of the internal part is 20mm, and the outer shaft of the internal part forms straight knurling; the length of the exposed portion is 32.75mm.
The length of the right metal shaft head R is 81.25mm, the outer diameter is 8mm, therefore, the inserted right metal shaft head R is provided with an internal part 110 and an external part 111, wherein the length of the internal part is 20mm, and the outer shaft of the internal part is provided with straight knurling; the length of the exposed portion was 61.25mm.
In addition, the method can be used for producing a composite materialAfter the left metal shaft head L and the right metal shaft head R are assembled, the axial tensile strength of the metal shaft head 11 is 105N/mm 2 (ii) a The torsional strength was 10.2kg.cm.
Meanwhile, the bending deformation resistance of the middle section of the straight shaft 1 is 0.31/4.5mm/Kg; the weight is about 78g (the straight shaft made of steel and nickel plating with the same size has the weight of about 220g, and the bending deformation resistance of the middle section is 0.07/4.5 mm/Kg).
Meanwhile, the forming process of the straight shaft 1 in the embodiment comprises the following steps:
s1, forming of shaft body
Glass fiber reinforced resin is adopted as a raw material for injection molding, wherein two shaft end parts of a shaft body form related through shaft end butt joint holes;
s2, mounting of metal shaft head
Selecting a metal bar material to be cut and processed to form a first end and a second end, wherein the first end and the second end respectively form a step-type inserting part, knurling is formed in the circumferential direction of the inserting part, electroplating is performed on the first end and the second end, after a plating layer is formed, the first end and the second end are respectively inserted into two shaft end butt joint holes of a shaft body from the inserting part, and after two metal shaft heads are inserted, the integral axial tensile strength is larger than 100N/mm 2 The torsional strength is larger than 10kg.cm, and the concentricity is controlled to be 0.03-0.05.
Example 2
As shown in fig. 2, the straight shaft according to the present embodiment is used for a paper feeding roller of a copy, and has substantially the same structure as that of embodiment 1, and the differences are as follows.
The length of the straight shaft 1 is 374.65mm, the length of the shaft body 10 is 330mm, the outer diameter is 14mm, the inner diameter is 7mm, the length-diameter ratio of the shaft body 10 is 23.57, and the shaft body 10 is made of ABS and glass fiber reinforced resin.
The left metal shaft head L is 39.6mm in length and 7.97mm in outer diameter, and is provided with a built-in part and an exposed part after being spliced, wherein the length of the built-in part is 20 mm; the length of the exposed portion was 19.6mm.
The length of the right metal shaft head R is 45.55mm, the outer diameter of the right metal shaft head R is 7.97mm, therefore, the right metal shaft head R is provided with an internal part and an exposed part after being inserted, wherein the length of the internal part is 20mm, and the outer shaft of the internal part forms straight knurling; the length of the exposed portion is 25.55mm.
Meanwhile, the bending deformation resistance of the middle section of the straight shaft 1 is 0.16/4.5mm/Kg; the weight was about 92g (the straight shaft made of steel + nickel plating of the same size weighed about 411g, and the mid-section bending deformation resistance was 0.0025/4.5 mm/Kg).
Example 3
As shown in fig. 3, the straight shaft according to the present embodiment is used for a paper feeding roller of a copy, and has substantially the same structure as that of embodiment 1, and the differences are as follows.
The length of the straight shaft 1 is 322.33mm, the length of the shaft body 10 is 290.63mm, the outer diameter is 8mm, the inner diameter is 4mm, the length-diameter ratio of the shaft body 10 is 36.32, and the material of the shaft body 10 is PC.
The left metal shaft head L is 34.3mm in length, 8mm in outer diameter and provided with a built-in part and an exposed part after being spliced, wherein the length of the built-in part is 20 mm; the length of the exposed portion was 14.3mm.
The length of the right metal shaft head R is 37.4mm, the outer diameter of the right metal shaft head R is 8mm, therefore, the right metal shaft head R is provided with an internal part and an exposed part after being inserted, wherein the length of the internal part is 20mm, and the outer shaft of the internal part forms straight knurling; the length of the exposed portion was 17.4mm.
Meanwhile, the bending deformation resistance of the middle section of the straight shaft 1 is 0.6/4.5mm/Kg; the weight was about 45g (the straight shaft made of steel + nickel plated steel of the same size weighed about 138g, and the mid-section bending deformation resistance was 0.09/4.5 mm/Kg).
Example 4
As shown in fig. 4, the straight shaft according to the present embodiment is used for a paper feeding roller of a copy, and has substantially the same structure as that of embodiment 1, and the differences are as follows.
The length of the straight shaft 1 is 174mm, the length of the shaft body 10 is 124.1mm, the outer diameter is 6mm, the inner diameter is 3mm, the length-diameter ratio of the shaft body 10 is 20.68, and the material of the shaft body 10 is nylon.
The left metal shaft head L is 37.3mm in length and 3.95mm in outer diameter, and is provided with a built-in part and an exposed part after being spliced, wherein the length of the built-in part is 15 mm; the length of the exposed portion was 12.3mm.
The length of the right metal shaft head R is 42.6mm, the outer diameter of the right metal shaft head R is 3.95mm, therefore, the right metal shaft head R has an internal part and an exposed part after being inserted, wherein the length of the internal part is 15mm, and the outer shaft of the internal part forms straight knurling; the length of the exposed portion was 27.6mm.
Meanwhile, the bending deformation resistance of the middle section of the straight shaft 1 is 0.29/4.5mm/Kg; the weight is about 10g (the straight shaft made of steel + nickel plating of the same size weighs about 21g, the middle section bending deformation resistance is 4.5 mm/Kg).
In conclusion, the straight shaft with the same service performance as the metal shaft is formed by combining the injection molded shaft body and the metal shaft head, so that the manufacturing cost is greatly reduced, the self weight is greatly reduced, and adverse factors (such as pollution, resource shortage, high energy consumption, high processing difficulty coefficient and the like) caused by materials and processes are eliminated.
That is, the use of new materials (e.g., glass fiber reinforced resin) instead of part of the metal structure can greatly improve the above problems:
1. the glass fiber reinforced resin is easy to obtain no matter raw materials, bars or pipes, and has wide domestic industrial distribution and low cost.
2. Light weight, high mechanical strength and easy cutting.
3. It is not rusted, is not afraid of cold, hot, acid and alkali, does not need rust prevention, does not need electroplating, and has little environmental pollution.
4. The industrial energy consumption and pollution are much lower than those of steel.
5. The material is not restricted by foreign countries.
The present invention has been described in detail in order to enable those skilled in the art to understand the invention and to practice it, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the present invention.
Claims (12)
1. A kind of straight shaft is disclosed, which is composed of a straight shaft,it includes the axle body, its characterized in that: the axle body injection moulding, and form axle head butt joint hole at two axle head portions, the straight axle still includes concentric and interference fit grafting respectively two the metal spindle nose in the axle head butt joint hole, wherein the slenderness ratio of axle body is 20 ~ 40:1, the axial tensile strength of a straight shaft formed by splicing the metal shaft heads is more than 100N/mm 2 (ii) a The torsion strength is more than 10kg.cm.
2. The straight shaft of claim 1, wherein: the length of the shaft body is L1, the length of the metal shaft head inserted into the shaft end butt joint hole is L2, L1= N x L2, and the value range of N is 8-20.
3. The straight shaft of claim 2, wherein: the metal shaft head forms a step insertion part, and the step surface of the step insertion part is attached to the shaft end surface of the shaft body after assembly.
4. The straight shaft of claim 3, wherein: the length of the straight shaft is L, wherein L = M L1,M ranges from 1.1 to 1.6.
5. The straight shaft of claim 1, wherein: the two shaft end butt joint holes are communicated; and/or the aperture of the through hole which is penetrated is equal to the aperture of the shaft end butt joint hole.
6. The straight shaft according to claim 1 or 5, wherein: the aperture of the shaft end butt joint hole is d1, the outer diameter of the shaft body is d2, wherein d2= n x d1, and the value range of n is 1.5-3.0.
7. The straight shaft of claim 1, wherein: the axial tensile strength of the shaft body is more than 100N/mm 2 The torsional strength is more than 10kg.cm; and/or the total weight of the straight shaft is less than 200g; and/or the outer diameter of the straight shaft is 14mm, 12mm, 10mm, 8mm or 6mm; andor the middle section bending deformation resistance of the straight shaft is 0.1-0.6: 4.5mm/Kg.
8. The straight shaft of claim 1, wherein: the shaft body is made of one or more of glass fiber reinforced resin, ABS, PC and nylon.
9. A process for forming a straight shaft according to any one of claims 1 to 8, comprising the steps of:
s1, forming of shaft body
One or more of glass fiber reinforced resin, ABS, PC and nylon are used as raw materials, injection molding is carried out, and relevant through shaft end butt joint holes are formed at two shaft end parts of a shaft body; or shaft end butt-joint holes are formed at two shaft end parts of the shaft body, and other parts of the shaft body are arranged in a solid manner;
s2, mounting of metal shaft head
The metal shaft heads are respectively arranged in the shaft end butt joint holes, and after the two metal shaft heads are inserted, the integral axial tensile strength is more than 100N/mm 2 The torsional strength is more than 10kg.cm, and the concentricity is controlled to be 0.03-0.05.
10. The forming process of the straight shaft according to claim 9, wherein: in S2, knurling is formed on the circumferential direction of the part, located in the shaft end butt joint hole, of the metal shaft head.
11. The forming process of the straight shaft according to claim 11, wherein: and in S2, selecting a metal bar to be cut and processed to form a first end and a second end, wherein the first end and the second end respectively form a stepped insertion part, then electroplating the first end and the second end to form a coating, and then respectively inserting the coating from the insertion parts to two shaft end butt joint holes of the shaft body.
12. Use of a hinge according to any one of claims 1 to 11 in office automation equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211301942.4A CN115653993A (en) | 2022-10-24 | 2022-10-24 | Straight shaft, forming process thereof and application thereof in office automation equipment |
| PCT/CN2023/100550 WO2024087659A1 (en) | 2022-10-24 | 2023-06-16 | Straight shaft, forming process therefor and use thereof in office automation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211301942.4A CN115653993A (en) | 2022-10-24 | 2022-10-24 | Straight shaft, forming process thereof and application thereof in office automation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115653993A true CN115653993A (en) | 2023-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211301942.4A Pending CN115653993A (en) | 2022-10-24 | 2022-10-24 | Straight shaft, forming process thereof and application thereof in office automation equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115653993A (en) |
| WO (1) | WO2024087659A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087659A1 (en) * | 2022-10-24 | 2024-05-02 | 橡技工业(苏州)有限公司 | Straight shaft, forming process therefor and use thereof in office automation equipment |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008309245A (en) * | 2007-06-14 | 2008-12-25 | Ntn Corp | Propeller shaft |
| CN107110228B (en) * | 2015-01-29 | 2020-03-20 | 本田技研工业株式会社 | Torque transmission device |
| DE102015115913A1 (en) * | 2015-09-21 | 2017-03-23 | Horiba Europe Gmbh | Shaft device made of a fiber-plastic composite |
| CN205315467U (en) * | 2015-12-07 | 2016-06-15 | 上海航秦新材料有限责任公司 | Carbon -fibre composite transmission shaft for vehicle |
| CN206277622U (en) * | 2016-12-08 | 2017-06-27 | 海天塑机集团有限公司 | A kind of screw in injection molding machine |
| CN106499721B (en) * | 2016-12-30 | 2023-07-25 | 常州朗奇威电器有限公司 | Motor shaft |
| CN208503243U (en) * | 2018-07-16 | 2019-02-15 | 淄博朗达复合材料有限公司 | A kind of carbon fiber composite drive shafts |
| CN115653993A (en) * | 2022-10-24 | 2023-01-31 | 橡技工业(苏州)有限公司 | Straight shaft, forming process thereof and application thereof in office automation equipment |
| CN218207434U (en) * | 2022-10-24 | 2023-01-03 | 橡技工业(苏州)有限公司 | Straight shaft and rubber roller for office automation equipment |
-
2022
- 2022-10-24 CN CN202211301942.4A patent/CN115653993A/en active Pending
-
2023
- 2023-06-16 WO PCT/CN2023/100550 patent/WO2024087659A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087659A1 (en) * | 2022-10-24 | 2024-05-02 | 橡技工业(苏州)有限公司 | Straight shaft, forming process therefor and use thereof in office automation equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024087659A1 (en) | 2024-05-02 |
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