CN111255788A - Transmission separation shifting fork supporting bolt with POE (polyolefin elastomer) ball head part and preparation method thereof - Google Patents

Transmission separation shifting fork supporting bolt with POE (polyolefin elastomer) ball head part and preparation method thereof Download PDF

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Publication number
CN111255788A
CN111255788A CN202010048477.2A CN202010048477A CN111255788A CN 111255788 A CN111255788 A CN 111255788A CN 202010048477 A CN202010048477 A CN 202010048477A CN 111255788 A CN111255788 A CN 111255788A
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China
Prior art keywords
bolt
ball head
head part
poe
gearbox
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Chinese (zh)
Inventor
叶忠财
戴其海
王意明
李涛
戴高寒
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WUHU QIANGZHEN AUTOMOBILE FASTENER CO Ltd
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WUHU QIANGZHEN AUTOMOBILE FASTENER CO Ltd
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Priority to CN202010048477.2A priority Critical patent/CN111255788A/en
Publication of CN111255788A publication Critical patent/CN111255788A/en
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    • 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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • 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
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • 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
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3009—Sulfides
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
    • F16D2023/141—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings characterised by using a fork; Details of forks
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02091—Measures for reducing weight of gearbox

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention discloses a gearbox separation shifting fork support bolt with a POE (polyolefin elastomer) ball head part and a preparation method thereof. Its simple structure can effectively improve gearbox separation shift fork stay bolt's wearability and intensity, improves its life, reduces the maintenance frequency, and effective noise reduction in use to reduce weight satisfies the lightweight requirement of car.

Description

Transmission separation shifting fork supporting bolt with POE (polyolefin elastomer) ball head part and preparation method thereof
Technical Field
The invention belongs to the technical field of automotive fasteners, and particularly relates to a gearbox release fork support bolt with a POE (polyolefin elastomer) ball head and a preparation method thereof.
Background
In the gearbox structure, when the gearbox realizes the control to the car operating mode, need gearbox separation shift fork action to control, and gearbox separation shift fork and separation shift fork stay bolt contact, at the gearbox during operation, both take place relative movement. Among the prior art, separation shift fork stay bolt is made for metal material, and like this, when the gearbox during operation, separation shift fork and stay bolt metal are to the metal contact for the noise is big, and the metal is to the metal moreover, can't reliably lubricate, and it is big to lead to the wearing and tearing volume, and stay bolt life is short, if use a period not change, will influence gearbox control accuracy, and leads to the cost-push like this. The supporting bolt made of metal materials in the prior art is heavy in weight and cannot meet the overall requirement of light weight of an automobile.
Disclosure of Invention
In order to solve the technical problem, the invention provides a gearbox separation shifting fork support bolt with a POE (polyolefin elastomer) ball head part and a preparation method thereof. Its simple structure can effectively improve gearbox separation shift fork stay bolt's wearability and intensity, improves its life, reduces the maintenance frequency, and effective noise reduction in use to reduce weight satisfies the lightweight requirement of car.
The technical scheme adopted by the invention is as follows:
a gearbox separation shift fork supporting bolt with a POE-shaped head part is characterized in that the POE-shaped head part is made of a raw material of the bolt head part (2).
Further, the bolt ball head is made of POE and glass fibers, and the mass of the glass fibers is 10-40% of that of the POE. The addition of the glass fiber can obviously enhance the strength and the flame retardant property of the bolt ball head. The adding amount of the glass fiber needs to be limited within the range of 15-35%, if the adding amount of the glass fiber is less than 15%, the reinforcing effect cannot be achieved, and if the adding amount of the glass fiber exceeds 35%, the brittleness of the material is increased, and the strength of the ball head is reduced.
Furthermore, the raw materials of the bolt ball head part comprise POE, glass fiber and molybdenum disulfide, and the mass of the molybdenum disulfide is 0.8-2.0% of that of the POE. The adding of molybdenum disulfide can improve the wear resistance of bolt bulb portion, and its addition needs to be controlled in 0.8 ~ 2.0% within range, and if adding too little, it is little to the improvement of wearability, if adding too much, can lead to the colour of bulb portion darker, and on the other hand can lead to intensity can't concentrate owing to more molybdenum disulfide dispersion in the material, and then has reduced the intensity of bulb portion.
Further, the mass of the glass fiber is preferably 18-22% of POE. According to the invention, short glass fiber is added into POE for reinforcement, so that the strength of the head part of the bolt ball is improved, and the bolt ball is better mixed and dissolved in the processing process.
The traditional metal integrated gearbox release fork support bolt is replaced by the bolt with the ball head part which takes POE (polyolefin elastomer), or POE and glass fiber, or POE, glass fiber and molybdenum disulfide as raw materials, wherein POE is a copolymer of ethylene and octene, and has no unsaturated bond in the molecular structure, excellent aging resistance, acid and alkali resistance, oil resistance and other properties, and excellent mechanical properties. After the processed bolt ball head part is fixed on the bolt body, the toughness, the wear resistance, the fatigue resistance and the corrosion resistance of the bolt ball head part can be obviously improved, the service life of the bolt is obviously prolonged, and the replacement times are reduced; and the addition of the glass fiber and the molybdenum disulfide further improves the strength, wear resistance, fatigue resistance, corrosion resistance and flame retardant property of the bolt ball head part, and meets the light weight requirement of an automobile.
The bolt ball head is sleeved on one end of the bolt body, the external connecting sleeve is movably sleeved and connected with the bolt ball head, and the external connecting sleeve is connected with the separation shifting fork body of the gearbox.
The top end of the bolt ball head is provided with a groove.
The outer surface of the bolt ball head is provided with a plurality of small grooves which are arranged according to gaps, and each small groove is of a structure which can be fully distributed on the binding surface of the external connecting sleeve and the bolt ball head.
The top end of the head part of the bolt ball is provided with a large groove, the large groove is of a structure with the volume larger than that of the small groove, a structure for storing lubricating oil is arranged in the large groove, and a structure for storing the lubricating oil is also arranged in each small groove.
After the grooves are sleeved with the external connecting sleeves, a certain cavity is formed at the positions of the grooves, lubricating oil can be stored in the cavity, the lubricating property of the shifting fork supporting bolt for separating the gearbox during working is improved, the friction force between the shifting fork supporting bolt and the external connecting sleeves is reduced, the control accuracy of the gearbox is improved, and the service life of the bolt is prolonged.
The top end of the bolt ball head part is of a plane structure, and after the bolt ball head part is sleeved with the external connecting sleeve, a structure capable of forming a cavity part is arranged between the plane structure and the external connecting sleeve. Can store lubricating oil in the cavity, promote the lubricity of gearbox separation shift fork stay bolt during operation, reduce its and outside chain link friction between the cover, promote the accuracy of gearbox control to the life of extension bolt.
The bolt ball head part comprises a body part and a connecting part, the body part and the connecting part are of an integrated structure, and the body part is connected with one end of the bolt body in a sleeved mode.
The bolt body mounting bolt head's one end set up the spacing groove that the multichannel was arranged along bolt body a week, the spacing groove is used for fixed block bolt head.
One end of the bolt body sleeved bolt ball head portion is provided with a plurality of concave holes, the inner wall of the connecting portion of the bolt ball head portion is provided with a plurality of convex columns, and each convex column extends into one concave hole.
The bolt body is also provided with a boss part which is raised along the circumference of the bolt body, and when the bolt body is sleeved with the head part of the bolt ball, the inner end surface of the support sleeve is attached to the side end surface of the boss part.
The invention also provides a preparation method of the transmission case separation shifting fork supporting bolt with the POE material ball head part, which comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 80-90 ℃ for 30-50 min respectively; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: and placing one end of the bolt body connected with the bolt ball head into a mold, and injecting the mixture onto the bolt body at 180-190 ℃ and 3-5 MPa to form the bolt ball head.
Further, in the step (2), the injection molding time is 2-2.5 s, the pressure maintaining pressure is 5-6 MPa, the pressure maintaining time is 1.5-2.0 s, and the cooling time is 10-15 s.
The setting of above these parameters can guarantee that the bulb of POE material is through moulding plastics back and bolt body integrated into one piece to closely laminate.
Compared with the prior art, the invention has the following advantages:
(1) the transmission separation shifting fork support bolt head part which takes POE or POE and glass fiber or POE, glass fiber and molybdenum disulfide as raw materials replaces the traditional metal head part, and the POE is made of plastic material, so that the friction resistance is low when the transmission separation shifting fork support bolt head part is used; like this, when the separation shift fork removed and lead to outside adapter sleeve and bolt bulb relative movement, owing to be nylon and metal contact for the noise that outside adapter sleeve and bolt bulb relative movement produced when the separation shift fork removed reduces by a wide margin, thereby effectively reduces the whole noise of gearbox during operation, improves the performance. Meanwhile, a part of the support bolt originally made of metal materials is replaced by a plastic material with lighter weight, so that the overall weight of the support bolt for the shifting fork separated from the gearbox is effectively reduced, and the light weight requirement of an automobile is met;
(2) according to the invention, one or more grooves or plane structures are arranged on the gearbox release fork supporting bolt with the POE material at the ball head part, so that a certain cavity can be formed when the gearbox release fork supporting bolt is sleeved with the outer connecting sleeve of the release fork, and a certain lubricating substance can be contained in the cavity, so that during work, along with the movement of the release fork supporting bolt, lubricating liquid can be distributed on the surface of the bolt from the cavity, the lubricating property between the ball head part of the bolt and the connecting sleeve is increased, the noise of the gearbox during work can be reduced, and the sensitivity of the gearbox during work is improved;
(3) the transmission case separation shifting fork support bolt with the POE ball head part has the advantages that the injection molding process is simple, the injection molding is directly performed on one end of the bolt body, and the two are combined and clamped tightly.
The ball head part of the gearbox release shifting fork supporting bolt is simple in structure and low in cost, can effectively improve the wear resistance and strength, prolongs the service life, reduces the maintenance frequency, effectively reduces the noise in use, reduces the weight and meets the requirement of light weight of an automobile.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic structural view of a transmission release fork support bolt according to the present invention;
FIG. 2 is a schematic structural view of a bolt ball head of a transmission release fork jack bolt according to the present invention;
FIG. 3 is a cross-sectional view of the A-A face of the bolt ball head of the transmission release fork jack bolt of FIG. 2;
FIG. 4 is a schematic structural view of a transmission release fork support bolt according to embodiment 2 or 5 of the present invention;
FIG. 5 is a schematic structural view of a transmission release fork support bolt according to embodiment 3 or 6 of the present invention;
in the drawings, the reference numbers are respectively: 1. a bolt body; 2. a bolt ball head; 3. an outer connecting sleeve; 4. a small groove; 5. a body portion; 6. a connecting portion; 7. a limiting groove; 8. a raised strip; 9. concave holes; 10. a convex column; 11. a large groove; 12. a boss portion; 13. supporting the inner end surface of the sleeve; 14. planar structure, 15, boss plane.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
A gearbox separation shift fork supporting bolt with a POE (polyolefin elastomer) ball head part is characterized in that the POE ball head part 2 is made of POE and glass fiber accounting for 18% of the mass of the POE, and is shown in attached drawings 1-3.
The bolt ball head part 2 is sleeved on one end of the bolt body 1, the external connecting sleeve 3 is movably sleeved with the bolt ball head part, and the external connecting sleeve 3 is connected with the separation shifting fork body of the gearbox.
Above-mentioned structure, when design or preparation gearbox separation shift fork stay bolt (gearbox separation shift fork supporting pin), after 1 machine-shaping with bolt body, put into the mould with bolt body 1 again and directly mould plastics POE and form bolt bulb portion 2 on bolt body 1, bolt body is made for metal material, bolt bulb portion is the plastics material. Like this, when gearbox release shift fork stay bolt uses in the gearbox, through the outside adapter sleeve 3 suit of the separation shift fork that bolt bulb portion 2 and metal material made, like this, when the separation shift fork removes and leads to outside adapter sleeve 3 and bolt bulb portion 2 relative movement, owing to be plastics and metal contact, make the noise that outside adapter sleeve 3 and bolt bulb portion 2 relative movement produced when the separation shift fork removes reduce by a wide margin, thereby effectively reduce the whole noise of gearbox during operation, improve the gearbox performance, promote the whole travelling comfort of car. Meanwhile, the supporting bolt is originally a part of structure made of metal materials and is replaced by lighter nylon, so that the overall weight of the variable box separation shifting fork supporting bolt is effectively reduced, and the light weight requirement of an automobile is met. The wear resistance and the strength of the bolt ball head part 2 supported by the nylon material are effectively improved, after long-term use, the wear loss is low, frequent replacement is not needed, the service life is prolonged, and the maintenance cost is reduced. The gearbox release shifting fork support bolt is simple in structure and low in cost, can effectively improve the wear resistance and strength, prolong the service life, reduce the maintenance frequency, effectively reduce the noise and the weight in use, and meet the requirement of light weight of an automobile.
The outer surface of the bolt ball head part 2 is provided with a plurality of small grooves 4 which are arranged according to gaps, and each small groove 4 is set to be a structure which can be fully distributed on the binding surface of the external connecting sleeve 3 and the bolt ball head part 2.
The top of bolt bulb portion 2 sets up a big recess 11, and big recess 11 sets up to the structure that the volume is greater than little recess 4, sets up the structure of depositing lubricating oil in the big recess 11, also sets up the structure of depositing lubricating oil in every little recess 4 respectively to improve lubricated effect, reduce wearing and tearing and noise.
The bolt head part 2 comprises a body part 5 and a connecting part 6, the body part 5 and the connecting part 6 are of an integral structure, and the connecting part 6 is connected with one end of the bolt body 1 in a sleeved mode. According to the structure, the head of the bolt ball is connected with one end of the bolt body through the connecting part, so that a complete gearbox separation shifting fork supporting bolt is formed.
Bolt body 1 mounting bolt bulb 2 one end set up the spacing groove 7 that the multichannel was arranged along 1 a week of bolt body, 6 inner walls of connecting portion set up with 7 quantity of spacing groove and the protruding strip 8 of position one-to-one, every way protruding strip 8 is arranged along 6 inner walls of connecting portion a week respectively. Above-mentioned structure, through the cooperation of protruding strip and spacing groove, when gearbox work lead to separation shift fork stay bolt to receive external force and strike, can not take place the axial float between bolt body and the bolt bulb portion, ensure both fixed connection's reliability, the life-span improves.
The bolt ball head part 2 is of a structure which is connected with the bolt body 1 in a sleeved mode in an injection molding mode. Above-mentioned structure, reliable fixed suit is connected can be realized through moulding plastics to bolt bulb portion and bolt body.
One end of the bolt body 1 sleeved with the bolt ball head part 2 is provided with a plurality of concave holes 9, the inner wall of the connecting part 6 of the bolt ball head part 2 is provided with a plurality of convex columns 10, and each convex column 10 extends into one concave hole 9. Above-mentioned structure, the cooperation of projection and shrinkage pool leads to separating shift fork stay bolt to receive external force when strikeing at the gearbox work, can not take place radial rotation between bolt body and the bolt bulb portion, ensures fixed connection's reliability, and the life-span improves.
The bolt body 1 is also provided with a boss part 12 protruding along the circumference of the bolt body 1, and when the bolt body 1 is sleeved with the bolt ball head part 2, the inner end surface 13 of the support sleeve is attached to the side end surface of the boss part 12. Above-mentioned structure is as another kind of embodiment, and when gearbox work lead to separation shift fork stay bolt to receive external force and assault, can not take place axial float between bolt body and the bolt bulb portion, ensures the reliability that both connect, and the life-span improves.
The preparation method of the gearbox release shifting fork supporting bolt with the POE material ball head part comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 80 deg.C for 50 min; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: one end of the bolt body 1 connected with the bolt ball head part 2 is placed into a mould, and the mixture is injected on the bolt body 1 at 180 ℃ and 5MPa to form the bolt ball head part 2.
In step S2, the injection molding time is 2.5S, the holding pressure is 5MPa, the holding time is 2S, and the cooling time is 10S.
The performance evaluation results of the fork stay bolt ball head obtained in this embodiment are as follows:
1) after the groove at the head of the separation shifting fork support screw is coated with the molybdenum disulfide lithium-based lubricating grease, the durability test is carried out for 100 ten thousand times, abnormal abrasion is avoided, and the durability evaluation index requirement is met;
2) the groove at the head of the separation shifting fork support screw ball is not coated with lubricating grease for 100 ten thousand endurance tests, has no abnormal abrasion, and meets the requirement of endurance evaluation indexes;
3) high-temperature thermal aging test is carried out at 150 ℃ for 200h, and the sample piece has no pulverization, cracking and foaming and meets the evaluation index requirement;
4) the static pressure strength test requires that the pressure is larger than 5500N, and the actual measurement value reaches 29560N, so that the requirement is met;
5) in the low-temperature strength test, the sample has no abnormal condition when the bearing force is loaded to 18000N at minus 40 ℃, so that the requirement is met;
6) the ultimate low-temperature static pressure strength is that the sample piece is crushed when being loaded to 19371.9N at the temperature of-63 ℃ to meet the requirement.
Example 2
The utility model provides a bulb is gearbox separation shift fork supporting bolt of POE material, the raw materials of bolt bulb 2 are POE, glass fiber and molybdenum disulfide, glass fiber's quality is 20% of POE, molybdenum disulfide's quality is 1.0% of POE quality. As shown in fig. 4.
The bolt ball head part 2 is sleeved on one end of the bolt body 1, the external connecting sleeve 3 is movably sleeved with the bolt ball head part, and the external connecting sleeve 3 is connected with the separation shifting fork body of the gearbox.
The top end of the bolt head 2 is provided with a groove 4. Can place storage lubricating oil in the recess, improve lubricated effect, reduce wearing and tearing and noise.
Bolt body 1 one end of installation bolt bulb 2 set up a boss plane 15, the planar cross section of boss is greater than the bolt body's of installation bolt bulb department cross section, through the setting of boss plane 15, when gearbox work leads to separation shift fork supporting bolt to receive external force and assaults, can not take place axial float between bolt body and the bolt bulb, ensure both fixed connection's reliability, the life-span improves.
The bolt ball head part 2 is of a structure which is connected with the bolt body 1 in a sleeved mode in an injection molding mode. Above-mentioned structure, reliable fixed suit is connected can be realized through moulding plastics to bolt bulb portion and bolt body.
The preparation method of the gearbox release shifting fork supporting bolt with the POE material ball head part comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 85 deg.C for 45 min; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: one end of the bolt body (1) connected with the bolt ball head (2) is placed into a mould, and the mixture is injected on the bolt body (1) at 185 ℃ and 4MPa to form the bolt ball head (2).
In step S2, the injection molding time is 2.0S, the holding pressure is 6MPa, the holding time is 1.5S, and the cooling time is 12S.
The performance evaluation results of the fork stay bolt ball head obtained in this embodiment are as follows:
1) after the groove at the head of the separation shifting fork support screw is coated with the molybdenum disulfide lithium-based lubricating grease, the durability test is carried out for 100 ten thousand times, abnormal abrasion is avoided, and the durability evaluation index requirement is met;
2) the groove at the head of the separation shifting fork support screw ball is not coated with lubricating grease for 100 ten thousand endurance tests, has no abnormal abrasion, and meets the requirement of endurance evaluation indexes;
3) high-temperature thermal aging test is carried out at 150 ℃ for 200h, and the sample piece has no pulverization, cracking and foaming and meets the evaluation index requirement;
4) the static pressure strength test requires that the pressure is larger than 5500N, and the actual measurement value reaches 29982N, so that the requirement is met;
5) in the low-temperature strength test, the sample has no abnormal condition when the bearing force is loaded to 18000N at minus 40 ℃, so that the requirement is met;
6) the ultimate low-temperature static pressure strength is that the sample piece is crushed when being loaded to 19371.9N at the temperature of-63 ℃ to meet the requirement.
Example 3
The utility model provides a bulb is transmission separation shift fork supporting bolt of POE material, bolt bulb 2 be POE, glass fiber and molybdenum disulfide, glass fiber's quality is 22% of POE, molybdenum disulfide's quality is 1.8% of POE quality. As shown in fig. 5.
The bolt ball head part 2 is sleeved on one end of the bolt body 1, the external connecting sleeve 3 is movably sleeved with the bolt ball head part, and the external connecting sleeve 3 is connected with the separation shifting fork body of the gearbox.
The top end of the bolt ball head part 2 is a plane structure 14, and after the bolt ball head part 2 is sleeved with the external connecting sleeve 3, a structure capable of forming a cavity part is arranged between the plane structure 14 and the external connecting sleeve 3.
The bolt head part 2 comprises a body part 5 and a connecting part 6, the body part 5 and the connecting part 6 are of an integral structure, and the connecting part 6 is connected with one end of the bolt body 1 in a sleeved mode. According to the structure, the head of the bolt ball is connected with one end of the bolt body through the connecting part, so that a complete gearbox separation shifting fork supporting bolt is formed.
Bolt body 1 one end of installation bolt bulb 2 set up a boss plane 15, the planar cross section of boss is greater than the bolt body's of installation bolt bulb department cross section, through the setting of boss plane 15, when gearbox work leads to separation shift fork supporting bolt to receive external force and assaults, can not take place axial float between bolt body and the bolt bulb, ensure both fixed connection's reliability, the life-span improves.
The bolt ball head part 2 is of a structure which is connected with the bolt body 1 in a sleeved mode in an injection molding mode. Above-mentioned structure, reliable fixed suit is connected can be realized through moulding plastics to bolt bulb portion and bolt body.
The preparation method of the gearbox release shifting fork supporting bolt with the POE material ball head part comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 90 deg.C for 30 min; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: and (3) putting one end of the bolt body 1 connected with the bolt ball head part 2 into a mould, and injecting the mixture onto the bolt body 1 at 290 ℃ and 3MPa to form the bolt ball head part 2.
In the step S2, the injection molding time is 2.5S, the holding pressure is 6.0MPa, the holding time is 2.0S, and the cooling time is 15S.
The performance evaluation results of the fork stay bolt ball head obtained in this embodiment are as follows:
1) after the groove at the head of the separation shifting fork support screw is coated with the molybdenum disulfide lithium-based lubricating grease, the durability test is carried out for 100 ten thousand times, abnormal abrasion is avoided, and the durability evaluation index requirement is met;
2) the groove at the head of the separation shifting fork support screw ball is not coated with lubricating grease for 100 ten thousand endurance tests, has no abnormal abrasion, and meets the requirement of endurance evaluation indexes;
3) high-temperature thermal aging test is carried out at 150 ℃ for 200h, and the sample piece has no pulverization, cracking and foaming and meets the evaluation index requirement;
4) the static pressure strength test shows that the design requirement is larger than 5500N, and the actual measurement value reaches 29914N, so that the requirement is met;
5) in the low-temperature strength test, the sample has no abnormal condition when the bearing force is loaded to 18000N at minus 40 ℃, so that the requirement is met;
6) the ultimate low-temperature static pressure strength is that the sample piece is crushed when being loaded to 19371.9N at the temperature of-63 ℃ to meet the requirement.
Example 4
A gearbox separation shift fork supporting bolt that bulb is POE material, 2 materials of bolt bulb are POE, as shown in figure 1 ~ 3.
The structure of the gearbox release fork supporting bolt is the same as that of embodiment 1.
The preparation method of the gearbox release fork support bolt comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 80 deg.C for 50 min; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: one end of the bolt body 1 connected with the bolt ball head part 2 is placed into a mould, and the mixture is injected on the bolt body 1 at 180 ℃ and 5MPa to form the bolt ball head part 2.
In the step S2, the injection molding time is 2S, the holding pressure is 6MPa, the holding time is 1.5S, and the cooling time is 10S.
The performance evaluation results of the fork stay bolt obtained in this example are as follows:
1) after the groove at the head of the separation shifting fork support screw is coated with the molybdenum disulfide lithium-based lubricating grease, the durability test is carried out for 100 ten thousand times, abnormal abrasion is avoided, and the durability evaluation index requirement is met;
2) the groove at the head of the separation shifting fork support screw ball is not coated with lubricating grease for 100 ten thousand endurance tests, has no abnormal abrasion, and meets the requirement of endurance evaluation indexes;
3) high-temperature thermal aging test is carried out at 150 ℃ for 200h, and the sample piece has no pulverization, cracking and foaming and meets the evaluation index requirement;
4) the static pressure strength test requires that the pressure is larger than 5500N, and the actual measurement value reaches 27458N, so that the requirement is met;
5) in the low-temperature strength test, the sample has no abnormal condition when the bearing force is loaded to 18000N at minus 40 ℃, so that the requirement is met;
6) the ultimate low-temperature static pressure strength is that the sample piece is crushed when being loaded to 19371.9N at the temperature of-63 ℃ to meet the requirement.
Example 5
A gearbox separation shift fork supporting bolt that bulb is POE material, the raw materials of bolt bulb 2 are POE, as shown in figure 4.
The structure of the gearbox release fork supporting bolt is the same as that of embodiment 2.
The preparation method of the gearbox release fork support bolt comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 85 deg.C for 45 min; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: one end of the bolt body (1) connected with the bolt ball head (2) is placed into a mould, and the mixture is injected on the bolt body (1) at 185 ℃ and 4MPa to form the bolt ball head (2).
In step S2, the injection molding time is 2.5S, the holding pressure is 5.7MPa, the holding time is 1.5S, and the cooling time is 12S.
The performance evaluation results of the fork stay bolt obtained in this example are as follows:
1) after the groove at the head of the separation shifting fork support screw is coated with the molybdenum disulfide lithium-based lubricating grease, the durability test is carried out for 100 ten thousand times, abnormal abrasion is avoided, and the durability evaluation index requirement is met;
2) the groove at the head of the separation shifting fork support screw ball is not coated with lubricating grease for 100 ten thousand endurance tests, has no abnormal abrasion, and meets the requirement of endurance evaluation indexes;
3) high-temperature thermal aging test is carried out at 150 ℃ for 200h, and the sample piece has no pulverization, cracking and foaming and meets the evaluation index requirement;
4) the static pressure strength test requires that the pressure is larger than 5500N, and the actual measurement value reaches 27194N, so that the requirement is met;
5) in the low-temperature strength test, the sample has no abnormal condition when the bearing force is loaded to 18000N at minus 40 ℃, so that the requirement is met;
6) the ultimate low-temperature static pressure strength is that the sample piece is crushed when being loaded to 19371.9N at the temperature of-63 ℃ to meet the requirement.
Example 6
A gearbox separation shift fork supporting bolt with a POE-shaped head part is provided, wherein the POE is arranged at the head part 2 of the bolt. As shown in fig. 5.
The structure of the gearbox release fork supporting bolt is the same as that of embodiment 3.
The preparation method of the gearbox release fork support bolt comprises the following steps:
s1: drying the raw materials in a vacuum drying oven at 90 deg.C for 30 min; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: and (3) placing one end of the bolt body 1 connected with the bolt ball head part 2 into a mould, and injecting the mixture onto the bolt body 1 at 190 ℃ and 3MPa to form the bolt ball head part 2.
In step S2, the injection molding time is 2S, the holding pressure is 5MPa, the holding time is 2S, and the cooling time is 15S.
The performance evaluation results of the fork stay bolt obtained in this example are as follows:
1) after the groove at the head of the separation shifting fork support screw is coated with the molybdenum disulfide lithium-based lubricating grease, the durability test is carried out for 100 ten thousand times, abnormal abrasion is avoided, and the durability evaluation index requirement is met;
2) the groove at the head of the separation shifting fork support screw ball is not coated with lubricating grease for 100 ten thousand endurance tests, has no abnormal abrasion, and meets the requirement of endurance evaluation indexes;
3) high-temperature thermal aging test is carried out at 150 ℃ for 200h, and the sample piece has no pulverization, cracking and foaming and meets the evaluation index requirement;
4) the static pressure strength test shows that the design requirement is larger than 5500N, the actual measurement value reaches 28116N, and the requirement is met;
5) in the low-temperature strength test, the sample has no abnormal condition when the bearing force is loaded to 18000N at minus 40 ℃, so that the requirement is met;
6) the ultimate low-temperature static pressure strength is that the sample piece is crushed when being loaded to 19371.9N at the temperature of-63 ℃ to meet the requirement.
The above detailed description of the transmission shift fork support bolt with POE ball head and the method for manufacturing the same are illustrative and not restrictive, and several embodiments can be enumerated according to the limited scope, so that changes and modifications without departing from the general concept of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A gearbox separation shift fork supporting bolt with a POE-shaped head part is characterized in that the POE-shaped head part is made of a raw material of the bolt head part (2).
2. The gearbox release fork support bolt with the POE (polyolefin elastomer) ball head part as claimed in claim 1, wherein the bolt ball head part (2) is made of POE and glass fiber, and the mass of the glass fiber is 15-35% of that of POE.
3. The gearbox release fork support bolt with the POE (polyolefin elastomer) ball head part as claimed in claim 2, wherein the raw materials of the bolt ball head part (2) comprise POE, glass fiber and molybdenum disulfide, and the mass of the molybdenum disulfide is 0.8-2.0% of that of the POE.
4. The gearbox release fork support bolt with the POE (polyolefin elastomer) ball head part as claimed in claim 2 or 3, wherein the length of the glass fiber is 3-6 mm, and the mass of the glass fiber is 18-22% of that of POE.
5. The transmission case release fork supporting bolt with the POE (polyolefin elastomer) ball head part as the any one of claims 1-3 is characterized in that the bolt ball head part (2) is sleeved on one end of the bolt body (1), the external connecting sleeve (3) is movably sleeved and connected with the bolt ball head part, and the external connecting sleeve (3) is connected with the release fork body of the transmission case.
6. The transmission case release fork support bolt with the POE (polyolefin elastomer) ball head part according to any one of claims 1-3, wherein a groove is arranged at the top end of the bolt ball head part (2).
7. The gearbox release fork support bolt with the POE (polyolefin elastomer) ball head part as claimed in any one of claims 1-3, wherein the outer surface of the bolt ball head part (2) is provided with a plurality of small grooves (4) which are arranged according to gaps, and each small groove (4) is arranged to be capable of being fully distributed on the joint surface of the external connecting sleeve (3) and the bolt ball head part (2).
8. The transmission case separation shift fork supporting bolt with the POE (power over Ethernet) ball head part as claimed in claim 7, wherein a large groove (11) is formed at the top end of the bolt ball head part (2), the large groove (11) is of a structure with a volume larger than that of the small groove (4), a structure for storing lubricating oil is arranged in the large groove (11), and a structure for storing lubricating oil is also arranged in each small groove (4).
9. The gearbox release fork support bolt with the POE (polyolefin elastomer) ball head part according to any one of claims 1-3, wherein the top end of the bolt ball head part (2) is of a plane structure (14), and after the bolt ball head part (2) is sleeved with the external connecting sleeve (3), a structure capable of forming a cavity part is arranged between the plane structure (14) and the external connecting sleeve (3).
10. The preparation method of the transmission case release fork support bolt with the POE ball head part as claimed in any one of claims 1 to 9, comprising the following steps:
s1: drying the raw materials in a vacuum drying oven at 80-90 ℃ for 30-50 min respectively; mixing the raw materials according to the formula ratio to obtain a mixture;
s2: one end of the bolt body (1) connected with the bolt ball head (2) is placed into a mold, and the mixture is injected onto the bolt body (1) at 180-230 ℃ and 3-5 MPa to form the bolt ball head (2).
CN202010048477.2A 2020-01-16 2020-01-16 Transmission separation shifting fork supporting bolt with POE (polyolefin elastomer) ball head part and preparation method thereof Pending CN111255788A (en)

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CN112109278A (en) * 2020-09-15 2020-12-22 杭州富生电器有限公司 Protective tooth for shaping motor coil and production process

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