CN112664552B - Pin-penetrating type ball pin assembly and polyurethane composite material used for same - Google Patents
Pin-penetrating type ball pin assembly and polyurethane composite material used for same Download PDFInfo
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Abstract
The pin-penetrating type ball pin assembly comprises a polyurethane ball pin, wherein the polyurethane ball pin comprises a ball body, a cylinder body and a shaft penetrating hole, and the outer ring surface of the cylinder body is provided with a first annular convex edge; the end surface of the spherical shell is provided with a second annular groove; an elastic sleeve; a sheath; the sealing cover comprises an annular base plate, an annular folded edge and a second annular convex edge which are coaxially arranged; the spherical shell is sleeved outside the spherical body, the elastic sleeve is sleeved outside the spherical shell, and the protective sleeve is sleeved outside the elastic sleeve; the sealing covers are arranged at two ends of the sheath, the cylinder body penetrates through the inner circle of the annular base plate and is sleeved by the annular folding edge, the inner annular surface of the annular folding edge is tightly attached to the outer annular surface of the cylinder body, and the second annular convex edge is clamped in the second annular groove. The polyurethane composite material comprises a polyurethane elastomer, vitrified micro bubbles, paraffin and polyethylene glycol fatty acid ester. The lubricant leakage between the ball body and the ball body shell can be effectively reduced.
Description
Technical Field
The application relates to the technical field of automobile parts, in particular to a pin-penetrating type ball pin assembly and a polyurethane composite material used by the assembly.
Background
Ball pin assemblies are important components in automotive construction. The method has very important influence on normal running and service life of the whole vehicle.
At present, in the related art, in order to make the ball body of the ball pin rotate more smoothly in the ball body shell, a lubricant, such as molybdenum disulfide, etc., is usually added between the ball body and the inner annular surface of the ball body shell. The rotation of the ball body will drive the lubricant to spread over the outer annular surface of the ball body, and at the same time will also cause the lubricant to leak out of the gap between the ball body and the ball body shell, thereby contaminating the ball pin assembly or other structures of the vehicle. Even if the sealing ring is added, the lubricant still leaks out from the clearance between the sealing ring and the rotator and the spherical shell.
In view of the related art in the above, the inventors have considered that the ball pin assembly has a problem in that lubricant is easily leaked.
Disclosure of Invention
In response to the deficiencies of the related art, the present application provides a pin-through ball pin assembly and a polyurethane composite material for use in the assembly for reducing lubricant leakage.
In a first aspect, the application provides a pin-through ball pin assembly, which adopts the following technical scheme:
a cotter ball pin assembly comprising:
the polyurethane ball pin comprises a ball body, a cylinder body and a through shaft hole, wherein the cylinder body is arranged on two opposite sides of the ball body, the through shaft hole penetrates through the cylinder body and the ball body along the axial direction of the cylinder body, and a first annular convex edge is arranged on the outer ring surface of the cylinder body;
the spherical shell is of a columnar shell structure with an inner annular surface matched with the outer annular surface of the sphere, and two end surfaces of the spherical shell are provided with second annular grooves;
the inner ring surface of the elastic sleeve is matched with the outer ring surface of the spherical shell;
the inner ring surface of the sheath is matched with the outer ring surface of the elastic sleeve;
the two sealing covers comprise an annular base plate, an annular folding edge and a second annular convex edge, the annular folding edge is connected with the inner circle of the annular base plate, and the annular folding edge and the second annular convex edge are respectively arranged on two sides of the annular base plate and are coaxially arranged; the inner ring surface of the annular folded edge is matched with the outer ring surface of the column body, and a first annular groove matched with the first annular convex edge is formed in the annular folded edge; the second annular convex edge is matched with the second annular groove;
wherein: the spherical shell is sleeved outside the spherical body, the elastic sleeve is sleeved outside the spherical shell, and the sheath is sleeved outside the elastic sleeve; the sealing covers are arranged at two ends of the sheath, the cylinder body penetrates through the inner circle of the annular base plate and is sleeved by the annular folding edge, the inner ring surface of the annular folding edge is attached to the outer ring surface of the cylinder body, the first annular convex edge is clamped in the first annular groove, and the second annular convex edge is clamped in the second annular groove.
By adopting the technical scheme, the lubricant leaked along the joint of the annular base plate and the end face of the spherical shell is blocked by the second annular rib and needs to detour from the second annular groove, so that the leakage stroke of the lubricant is prolonged, the leakage difficulty is increased, and the leakage possibility is reduced. The lubricant leaking from the joint of the outer ring surface of the cylinder and the inner ring surface of the annular folded edge is blocked by the first annular convex edge and needs to detour, the leaking stroke of the lubricant is also prolonged, the leaking difficulty is increased, and the leaking possibility is reduced.
Optionally, the annular flange is a hollow structure having a cavity; the cavity is provided with an opening which penetrates through the inner ring surface of the annular folded edge and surrounds the annular folded edge along the circumferential direction of the inner ring surface.
Through adopting above-mentioned technical scheme, along the emollient that the department of meeting spills in the outer anchor ring of cylinder and annular hem inner ring face, can meet the opening when spilling, compare in the small clearance between cylinder outer anchor ring face and annular hem inner ring face, the emollient can pass the opening more easily, and get into in the cavity of annular hem to spill between the anchor ring face and the annular hem inner ring face of cylinder outer anchor ring face and annular hem has been reduced greatly to the emollient.
Optionally, the first annular groove is provided with a plurality of through holes communicated with the cavity of the annular flange.
By adopting the technical scheme, the lubricant can meet the through hole when bypassing the first annular groove and can migrate into the cavity from the through hole, so that the possibility of leakage of the lubricant is further reduced.
Optionally, the spherical shell is formed by folding two half shells.
By adopting the technical scheme, the assembly of the sphere shell and the sphere is more convenient.
Optionally, a third annular groove is formed in the outer annular surface of the spherical shell, and an elastic ring is clamped in the third annular groove.
Through adopting above-mentioned technical scheme, the elastic ring can play the effect of connecting two halves casing is firm. Meanwhile, the third annular groove has a limiting effect on the elastic ring, and the problem that the elastic ring is displaced to fall off is solved.
Optionally, a first through hole is formed in a side wall of the spherical shell, a second through hole is formed in a side wall of the elastic sleeve, and a third through hole is formed in a side wall of the sheath; the first through hole, the second through hole and the third through hole are matched with each other, and a channel for communicating the outside and the inner ring surface of the spherical shell can be formed; and a hole sealing piece is arranged at the position of the third through hole, which is close to the outer ring surface of the sheath.
By adopting the technical scheme, the lubricant can be supplemented between the sphere shell and the sphere.
Optionally, the elastic sleeve is made of an elastic polyurethane material.
By adopting the technical scheme, the elastic property of the elastic polyurethane material can effectively buffer and protect the polyurethane ball pin.
Optionally, the two ends of the inner annular surface of the sheath are respectively provided with a fourth annular groove, the outer circle of the annular substrate of the sealing cover is provided with an elastic annular edge, and the elastic annular edge is clamped in the corresponding fourth annular groove.
Through adopting above-mentioned technical scheme, sealed lid can be connected with the sheath firmly.
In a second aspect, the present application provides a polyurethane composite material for the above pin-through ball pin assembly, which adopts the following technical scheme:
the polyurethane composite material used for the pin penetrating type ball pin assembly is prepared from the raw materials of a polyurethane elastomer, vitrified micro bubbles, paraffin and polyethylene glycol fatty acid ester.
By adopting the technical scheme, the vitrified micro bubbles are uniformly distributed in the polyurethane elastomer base material under the compatibility of the paraffin and the polyethylene glycol fatty acid ester, and the wear resistance of the polyurethane composite material is effectively improved due to the characteristics of higher particle strength and wear resistance, stable physical and chemical properties and light weight.
Optionally, the preparation raw materials comprise 100 parts by mass of polyurethane elastomer, 10-40 parts by mass of vitrified micro bubbles, 10-15 parts by mass of glass fiber, 6-12 parts by mass of ultrahigh molecular weight polyethylene, 7-12 parts by mass of zirconium boride, 15-25 parts by mass of high wear-resistant carbon black, 1-6 parts by mass of molybdenum disulfide, 1-3 parts by mass of polyethylene glycol fatty acid ester, 1-5 parts by mass of paraffin, 1-3 parts by mass of diisooctyl terephthalate, 0.5-1.5 parts by mass of N-isopropyl-N' -phenyl p-phenylenediamine, 2-4 parts by mass of dicumyl peroxide, 0.7-1.2 parts by mass of triallyl isocyanurate and 0.1-0.3 part by mass of sulfur.
By adopting the technical scheme, the wear resistance of the polyurethane composite material is obviously improved under the compatibility of the components.
In summary, the present application includes at least one of the following beneficial effects:
1. this application is through the joint of second annular bead and second ring channel, and the lubricant that spills along the department that meets of annular substrate and spheroid shell terminal surface can receive blocking of second annular bead, and need follow the second ring channel and detour to prolonged the stroke that the lubricant spills, increased the degree of difficulty that spills, reduced the possibility of spilling. Similarly, through the clamping connection of the first annular convex edge and the first annular groove, the lubricant leaking from the joint of the outer ring surface of the cylinder and the inner ring surface of the annular folding edge can be blocked by the first annular convex edge and needs to bypass, the leaking stroke of the lubricant is also prolonged, the leaking difficulty is increased, and the leaking possibility is reduced. Thereby effectively reducing the leakage of lubricant from between the ball and the ball shell.
2. The cavity of this application annular hem sets up the opening. The lubricant can easily pass through the opening and enter the cavity of the annular flange compared with a small gap between the outer ring surface of the cylinder and the inner ring surface of the annular flange when leaking, so that the leakage of the lubricant from the space between the outer ring surface of the cylinder and the inner ring surface of the annular flange can be further reduced.
3. The polyurethane composite material for preparing the ball pin has good wear resistance. The addition of the vitrified micro bubbles improves the wear resistance of the polyurethane composite material under the compatibility of other components.
Drawings
FIG. 1 is a schematic perspective view of a pin-through ball pin assembly of embodiment 1 of the present application;
FIG. 2 is an exploded view of the cotter pin assembly of embodiment 1 of the present application;
FIG. 3 is a schematic axial cross-sectional view of a pin-through ball pin assembly of embodiment 1 of the present application;
fig. 4 is an enlarged view at a in fig. 3.
Description of reference numerals: 1. a polyurethane ball pin; 11. a sphere; 12. a cylinder; 121. a first annular rib; 13. a shaft hole is penetrated; 2. a sphere shell; 21. a second annular groove; 22. a half shell; 23. a third annular groove; 24. a first through hole; 25. internally cutting corners; 3. an elastic sleeve; 31. a second through hole; 4. a sheath; 41. a third through hole; 42. a hole sealing piece; 43. a fourth annular groove; 5. a sealing cover; 51. an annular substrate; 52. annularly folding; 521. a cavity; 5211. an opening; 522. a first annular groove; 5221. a through hole; 53. a second annular rib; 54. an elastic ring edge; 6. an elastic ring.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
Example 1
Referring to fig. 1 and 2, the embodiment of the application discloses a pin-through ball pin assembly, which comprises a polyurethane ball pin 1, a ball shell 2, an elastic sleeve 3, a sheath 4, a sealing cover 5 and an elastic ring 6.
Referring to fig. 2 and 3, the polyurethane ball pin 1 includes a ball body 11, a cylinder 12, and a shaft penetration hole 13. The column 12 is of a cylindrical structure and has two columns, and the two columns are symmetrically arranged on two sides of the sphere 11; the sphere 11 is coaxially arranged with both cylinders 12. The shaft penetrating hole 13 is coaxially arranged with the polyurethane ball pin 1 and penetrates through the polyurethane ball pin 1 along the axial direction of the polyurethane ball pin 1 (namely, the shaft penetrating hole 13 respectively penetrates through the two columns 12 and the ball body 11 between the two columns along the axial direction); the through-hole 13 is used for accommodating a pin shaft. When the fixing device is used, an operator penetrates the pin shaft through the shaft penetrating hole 13 and fixes the pin shaft, and then fixes the polyurethane ball pin 1 through the fixed pin shaft. The outer circumferential surface of each cylindrical body 12 is provided with a first annular rib 121 made of hard plastic, and the first annular rib 121 is coaxially disposed with the cylindrical body 12.
Referring to fig. 2 and 3, the sphere housing 2 has a cylindrical housing structure with symmetrical openings at opposite sides, and an inner annular surface thereof is spherical and is fitted with an outer annular surface of the sphere 11, while an outer annular surface of the sphere housing 2 is cylindrical. The sphere shell 2 is sleeved outside the sphere 11 of the polyurethane sphere pin 1, the inner annular surface of the sphere shell 2 is attached to the outer annular surface of the sphere 11, and the sphere 11 can rotate in the sphere shell 2. And a lubricant such as molybdenum disulfide is arranged between the inner ring surface of the sphere shell 2 and the outer ring surface of the sphere 11, so that the sphere 11 can smoothly rotate in the sphere shell 2. In addition, annular internal angles 25 are arranged at two openings of the inner annular surface of the spherical shell 2, so that the rotatable angle of the polyurethane ball pin 1 in the spherical shell 2 is increased.
Referring to fig. 2 and 3, the ball housing 2 is formed by two half shells 22, and the ball 11 is enclosed in the ball housing 2 by the two half shells. The outer circumferential surface of the spherical shell 2 is provided with a third annular groove 23 which surrounds the periphery of the spherical shell along the circumferential direction (each half shell 22 is provided with a half-circle third annular groove 23). The third annular grooves 23 are provided in two, axially symmetrically arranged on the ball housing 2. Two elastic rings 6 are arranged and are respectively clamped in the two third annular grooves 23 in a one-to-one correspondence manner. The elastic ring 6 secures the two half-shells 22 together. Meanwhile, the third annular groove 23 has a limiting effect on the elastic ring 6, so that the problem of falling off caused by displacement of the elastic ring is reduced; in some embodiments, the elastic ring 6 is a bungee ring. Meanwhile, the two end faces of the spherical shell 2 are respectively provided with a second annular groove 21, and the second annular grooves 21 are coaxial with the spherical shell 2.
Referring to fig. 2 and 3, the elastic sleeve 3 is a hollow cylinder having symmetrical openings at opposite ends, and has an inner circumferential surface which is cylindrical and is fitted with an outer circumferential surface of the ball housing 2, while the outer circumferential surface of the elastic sleeve 3 is also cylindrical and has the same axial length as the ball housing 2. The elastic sleeve 3 is sleeved outside the sphere shell 2, and the inner annular surface of the elastic sleeve 3 is in interference fit with the outer annular surface of the sphere shell 2. The elastic sheath 3 is made of a highly elastic thermoplastic polyurethane material (hardness 70A). The material has good elasticity and can effectively buffer and protect the polyurethane ball pin 1.
Referring to fig. 2 and 3, the sheath 4 is also a hollow cylinder with symmetrical openings at opposite ends, and both the inner annular surface and the outer annular surface are cylindrical; the inner ring surface of the sheath 4 is matched with the outer ring surface of the elastic sleeve 3. The sheath 4 is sleeved outside the elastic sleeve 3, and the elastic sleeve and the sheath are in interference fit, so that the whole assembly structure is more stable. In addition, the axial length of the sheath 4 is greater than the axial length of the elastic sheath 3.
Referring to fig. 2 and 3, the sealing cap 5 has an annular structure including an annular base plate 51, an annular flange 52, and a second annular rib 53. Wherein the annular flange 52 is provided on the inner circle of the annular base plate 51, and the second annular rib 53 is fitted with the second annular groove 21. The annular flange 52 and the second annular rib 53 are respectively provided on opposite sides of the annular base plate 51, and are coaxially provided. The annular flange 52 and the second annular rib 53 are made of an elastic material.
Referring to fig. 3 and 4, the inner annular surface of the annular flange 52 is fitted to the outer annular surface of the cylindrical body 12. The annular flange 52 is a hollow structure, and the cavity 521 thereof has an opening 5211 penetrating through and circumferentially surrounding the inner annular surface of the annular flange 52. Meanwhile, the inner annular surface of the annular flange 52 is further provided with a first annular groove 522 circumferentially surrounding the annular flange, the first annular groove 522 is located on the side of the opening 5211 away from the annular base plate 51, and the first annular groove 522 is matched with the first annular rib 121. And, a plurality of through holes 5221 communicating with the cavity 521 are provided at the bottom of the first annular groove 522.
Referring to fig. 2 and 3, an elastic ring rim 54 surrounding and closely connected to a circumference of the annular base plate 51 of the sealing cover 5 is provided at the outer circumference thereof. Correspondingly, a fourth annular groove 43 matched with the elastic annular edge 54 is arranged on the inner annular surface of the sheath 4 at the position close to the end part of the sheath 4. The fourth annular groove 43 surrounds the inner annular surface of the sheath 4 for one circle, and the radial direction of the fourth annular groove 43 is perpendicular to the axial direction of the sheath 4.
Referring to fig. 3 and 4, the sealing caps 5 are provided in two, symmetrically disposed at both ends of the sheath 4. The elastic annular edge 54 of the sealing cover 5 is clamped in the corresponding fourth annular groove 43 of the sheath 4, and the annular base plate 51 of the sealing cover 5 is attached to the end surfaces of the spherical shell 2 and the elastic sleeve 3; the cylinder 12 passes through the inner circle of the annular base plate 51 and is sleeved by the annular flange 52, and the inner annular surface of the annular flange 52 is attached to the outer annular surface of the cylinder 12. Meanwhile, the first annular rib 121 is in interference fit with the first annular groove 522, and the second annular rib 53 is in interference fit with the second annular groove 21. The sealing cover 5 can effectively prevent dirt in the external environment from entering the sheath 4 to damage the polyurethane ball pin 1 and other parts.
When ball 11 of polyurethane ball pin 1 rotates in ball shell 2, a lubricant such as molybdenum disulfide leaks between ball 11 and ball shell 2. The way the lubricant leaks out is: leaks out along the joint of the annular base plate 51 and the end surface of the spherical shell 2; leaking along the junction of the outer circumferential surface of the cylindrical body 12 and the inner circumferential surface of the annular flange 52. Through the clamping connection of the second annular rib 53 and the second annular groove 21, the lubricant leaking from the joint of the annular base plate 51 and the end face of the sphere shell 2 is blocked by the second annular rib 53 and needs to bypass the second annular groove 21, so that the leakage stroke of the lubricant is prolonged, the leakage difficulty is increased, and the leakage possibility is reduced. By the clamping of the first annular rib 121 and the first annular groove 522 and the arrangement of the opening 5211, the lubricant leaking from the joint of the outer annular surface of the cylindrical body 12 and the inner annular surface of the annular flange 52 meets the opening 5211 during leakage, and the lubricant can more easily pass through the opening 5211 and enter the cavity 521 of the annular flange 52 than a small gap between the outer annular surface of the cylindrical body 12 and the inner annular surface of the annular flange 52, so that the leakage of the lubricant from the joint between the outer annular surface of the cylindrical body 12 and the inner annular surface of the annular flange 52 is reduced; the lubricant that does not enter the opening 5211 is blocked by the first annular rib 121 during leakage and needs to go around, so that the leakage stroke of the lubricant is also prolonged, the leakage difficulty is increased, and the leakage possibility is reduced. In addition, the through hole 5221 provided at the bottom of the first annular groove 522 allows the lubricant to migrate from the through hole 5221 into the cavity 521 while bypassing the first annular groove 522, thereby further reducing the possibility of lubricant leakage.
Referring to fig. 2 and 3, a first through hole 24 is provided in a side wall of the spherical shell 2, a second through hole 31 is provided in a side wall of the elastic cover 3, and a third through hole 41 is provided in a side wall of the protector 4. The first through hole 24, the second through hole 31, and the third through hole 41 are matched with each other to form a passage for communicating the outside with the inner annular surface of the ball housing 2, and the passage is used for supplying lubricant between the ball housing 2 and the ball 11. Wherein, a hole sealing piece 42 is arranged at the position of the third through hole 41 close to the outer ring surface of the sheath 4 and is used for sealing the channel after the lubricant is supplemented.
The embodiment of the application also discloses a polyurethane composite material used for the ball pin assembly, which is mainly used for preparing the polyurethane ball pin 1 in the pin-penetrating type ball pin assembly.
The preparation raw materials of the polyurethane composite material comprise: 100kg of polyurethane elastomer, 25kg of vitrified micro bubbles, 12kg of glass fiber, 10kg of ultra-high molecular weight polyethylene, 10kg of zirconium boride, 22kg of high abrasion carbon black, 4kg of molybdenum disulfide, 2kg of polyethylene glycol fatty acid ester, 3kg of paraffin wax, 2kg of diisooctyl terephthalate, 1.5kg of N-isopropyl-N' -phenyl-p-phenylenediamine, 4kg of dicumyl peroxide, 0.7kg of triallyl isocyanurate and 0.3kg of sulfur.
Wherein: the polyurethane elastomer is a mixed polyurethane material with the model number UR101, which is purchased from Baichuan company of Hua Gong, Guangzhou.
The vitrified micro bubbles are purchased from Hebei Hemiguang mineral products, Inc.; the grain diameter is 60 meshes and SiO2The content of (B) is more than 60%, and the density is 0.13-0.143g/cm3. The vitrified micro bubbles have higher particle strength and wear resistance due to the vitrification of the surface, the compressive strength can reach more than 100MPa, and the physical and chemical properties are very stableAnd the light-weight plastic has the characteristic of light weight. The wear-resistant polyurethane composite material is added into a polyurethane base material, and the wear resistance of the polyurethane composite material is improved.
The density of the glass fiber is 2.2-2.66g/cm3The length is 200-500 mu m, and the polyurethane composite material is added to improve the hardness of the polyurethane composite material.
The ultra-high molecular weight polyethylene is purchased from Jiuding chemical materials Co.Ltd, the molecular weight of the polyethylene is higher than 500 ten thousand, and the friction coefficient is 0.08. The ultra-high molecular weight polyethylene has a stable molecular structure, and good self-lubricating property and scratch resistance; the friction coefficient of the polyurethane composite material can be reduced by adding the polyurethane composite material into the polyurethane composite material, and the wear resistance of the polyurethane composite material is improved. The Rockwell hardness of the zirconium boride is 88-91, the zirconium boride has high hardness and stability, the compressive strength exceeds 1500GPa, and the wear resistance of the polyurethane composite material is favorably improved.
The high wear-resistant carbon black is N330, has good reinforcing performance and can endow the polyurethane composite material with good wear resistance. The molybdenum disulfide has good lubricating effect, can reduce the friction coefficient of the polyurethane composite material, has self-lubricating property, is used for parts such as shaft sleeves, bearings and the like, and can improve the wear resistance of the parts.
Polyethylene glycol fatty acid ester is a surfactant, and is purchased from Haian petrochemical plants of Jiangsu province. The polyethylene glycol fatty acid ester is polyethylene glycol 200 monooleate (PEG-200 MO), and has saponification value of 65-75mgKOH/g and HLB value of 12-13. The addition of the substance is beneficial to the uniform dispersion of the vitrified micro bubbles in the polyurethane elastomer substrate. The paraffin adopts No. 58 semi-refined paraffin of Jinanteng chemical Limited company, can improve the compatibility of each component of the material, and is beneficial to the uniform dispersion of the vitrified micro bubbles in the polyurethane elastomer substrate.
Diisooctyl terephthalate is used as a plasticizer; N-isopropyl-N' -phenyl-p-phenylenediamine is used as an anti-aging agent; dicumyl peroxide is used as a vulcanizing agent; triallyl isocyanurate is used as a vulcanization aid.
The polyurethane composite material is obtained by a conventional preparation method, and specifically comprises the following steps:
1. adding the polyurethane elastomer, the ultra-high molecular weight polyethylene, the zirconium boride, the high wear-resistant carbon black, the molybdenum disulfide, the diisooctyl terephthalate and the N-isopropyl-N' -phenyl-p-phenylenediamine into an internal mixer for internal mixing for 30 min. And (3) discharging the rubber when the temperature is raised to 120 ℃, and then standing at room temperature for 12 hours to obtain the banburying mixed rubber.
2. Adding the banburying mixed glue, the vitrified micro bubbles, the glass fiber, the polyethylene glycol fatty acid ester, the paraffin, the dicumyl peroxide, the triallyl isocyanurate and the sulfur into an open mill, and open milling for 30min at the temperature of 50 ℃ to obtain the open milling mixed glue.
3. Putting the open-mill mixed rubber into a mold, and vulcanizing for 10min at the temperature of 150 ℃ and under the pressure of 5MPa to obtain the polyurethane composite material.
Example 2
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material has different raw material proportions, and specifically comprises the following components: 100kg of polyurethane elastomer, 10kg of vitrified micro bubbles, 10kg of glass fiber, 12kg of ultra-high molecular weight polyethylene, 7kg of zirconium boride, 25kg of high abrasion carbon black, 1kg of molybdenum disulfide, 1kg of polyethylene glycol fatty acid ester, 1kg of paraffin wax, 3kg of diisooctyl terephthalate, 1kg of N-isopropyl-N' -phenyl-p-phenylenediamine, 2kg of dicumyl peroxide, 1.2kg of triallyl isocyanurate and 0.1kg of sulfur.
Example 3
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material has different raw material proportions, and specifically comprises the following components: 100kg of polyurethane elastomer, 40kg of vitrified micro bubbles, 15kg of glass fiber, 6kg of ultra-high molecular weight polyethylene, 12kg of zirconium boride, 15kg of high abrasion carbon black, 6kg of molybdenum disulfide, 3kg of polyethylene glycol fatty acid ester, 5kg of paraffin wax, 1kg of diisooctyl terephthalate, 0.5kg of N-isopropyl-N' -phenyl-p-phenylenediamine, 3kg of dicumyl peroxide, 1kg of triallyl isocyanurate and 0.1kg of sulfur.
Example 4
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material comprises the following raw material components: the amount of the vitrified small balls added was 3 kg.
Example 5
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material comprises the following raw material components: the amount of the vitrified micro bubbles added is 10 kg.
Example 6
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material comprises the following raw material components: the amount of the vitrified small balls added was 18 kg.
Example 7
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material comprises the following raw material components: the amount of the vitrified small balls added was 32 kg.
Example 8
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material comprises the following raw material components: the amount of the vitrified small balls added was 40 kg.
Example 9
The pin-through ball pin assembly and the polyurethane composite material used for the assembly disclosed in this embodiment are substantially the same as those in embodiment 1, except that: the polyurethane composite material comprises the following raw material components: the amount of the vitrified small balls added was 45 kg.
Comparative example 1
This comparative example includes a pin-through ball pin assembly and polyurethane composite used for the assembly, essentially the same as example 1, except that: no vitrified micro bubbles are added in the raw material components of the polyurethane composite material.
Comparative example 2
This comparative example includes a pin-through ball pin assembly and polyurethane composite used for the assembly, essentially the same as example 2, except that: no vitrified micro bubbles are added in the raw material components of the polyurethane composite material.
Comparative example 3
This comparative example includes a pin-through ball pin assembly and polyurethane composite used for the assembly, essentially the same as example 3, except that: no vitrified micro bubbles are added in the raw material components of the polyurethane composite material.
And (3) performance testing:
the polyurethane composites obtained in examples 1 to 9 and comparative examples 1 to 3 were sampled and tested for properties.
Tensile strength: the test was carried out using a BF-L1 type tensile testing machine (manufactured by Baifei tester, Dongguan, east City). Wherein: gauge length 25mm, draw rate 250mm/min, sample size (length, width, height) 70 x 4 x 2mm, test temperature 25 ℃.
The rebound resilience: the test was carried out using QI-061 vertical reverse dial elasticity tester (Kailan tester, Kailan, Miyajie, Dongguan). Wherein: the drop height was 400mm, the weight of the drop weight was 28g, and the test temperature was 25 ℃.
Wear resistance: reference standard: GBT 1689-1998; the test was carried out using an Arclon abrasion machine. Wherein: the test specimen was run for 1.61km with a test temperature of 25 ℃ and a humidity of 50%.
The detection results are shown in the table:
TABLE 1 results of testing the properties of the polyurethane composites of examples 1 to 9 and comparative examples 1 to 3
| Numbering | Tensile strength/MPa | Rebound Rate/%) | Abrasion volume/cm3 |
| Example 1 | 34.4 | 52 | 0.013 |
| Example 2 | 34.6 | 53 | 0.015 |
| Example 3 | 34.0 | 50 | 0.012 |
| Example 4 | 35.0 | 57 | 0.025 |
| Example 5 | 34.7 | 55 | 0.018 |
| Example 6 | 34.5 | 52 | 0.016 |
| Example 7 | 34.4 | 49 | 0.012 |
| Example 8 | 34.1 | 48 | 0.010 |
| Example 9 | 34.0 | 44 | 0.010 |
| Comparative example 1 | 34.6 | 54 | 0.048 |
| Comparative example 2 | 34.9 | 56 | 0.051 |
| Comparative example 3 | 34.5 | 53 | 0.048 |
Referring to table 1, examples 1-3 and comparative examples 1-3 examined the effect of the addition of the vitrified microbeads on the abrasion resistance of the polyurethane composite. The test results of comparative example 1 and comparative example 1, example 2 and comparative example 2, example 3 and comparative example 3 can find that: after the vitrified micro bubbles are added, the wear resistance of the polyurethane composite material is obviously improved, and the tensile strength and the rebound rate are not obviously changed. The vitrified micro bubbles have higher particle strength and wear resistance and very stable physical and chemical properties; therefore, the wear-resistant polyurethane composite material is added into the polyurethane base material, and the wear resistance of the polyurethane composite material is improved.
The influence of the addition amount of the vitrified micro bubbles on the mechanical properties of the polyurethane composite material is examined in example 1 and examples 4 to 9. The detection result shows that the abrasion resistance of the polyurethane composite material is continuously improved and gradually becomes stable along with the increase of the adding amount of the vitrified micro bubbles. Meanwhile, as the addition amount of the vitrified micro bubbles is gradually increased, the proportion of the polyurethane base material is gradually reduced, and the rebound rate of the polyurethane composite material is reduced. Therefore, the amount of the vitrified small balls added is preferably 10 to 40wt% of the polyurethane elastomer.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. Wear round pin formula ball round pin assembly, its characterized in that: the method comprises the following steps:
the polyurethane ball pin (1) comprises a ball body (11), a cylinder body (12) and a through shaft hole (13), wherein the cylinder body (12) is arranged on two opposite sides of the ball body (11), the through shaft hole (13) axially penetrates through the cylinder body (12) and the ball body (11) along the cylinder body (12), and a first annular convex rib (121) is arranged on the outer annular surface of the cylinder body (12);
the sphere shell (2) is of a columnar shell structure with an inner ring surface matched with the outer ring surface of the sphere (11), and two end surfaces of the sphere shell are provided with second annular grooves (21);
the inner ring surface of the elastic sleeve (3) is matched with the outer ring surface of the spherical shell (2);
the inner ring surface of the sheath (4) is matched with the outer ring surface of the elastic sleeve (3);
the two sealing covers (5) comprise annular base plates (51), annular folded edges (52) and second annular ribs (53), the annular folded edges (52) are connected with the inner circles of the annular base plates (51), the annular folded edges (52) and the second annular ribs (53) are respectively arranged on two sides of the annular base plates (51) and are coaxially arranged; the inner ring surface of the annular folded edge (52) is matched with the outer ring surface of the column body (12), and a first annular groove (522) matched with the first annular convex rib (121) is arranged; the second annular rib (53) is matched with the second annular groove (21);
wherein: the sphere shell (2) is sleeved outside the sphere (11), the elastic sleeve (3) is sleeved outside the sphere shell (2), and the sheath (4) is sleeved outside the elastic sleeve (3); the sealing covers (5) are arranged at two ends of the sheath (4), the column body (12) penetrates through the inner circle of the annular base plate (51) and is sleeved by the annular folding edge (52), the inner ring surface of the annular folding edge (52) is attached to the outer ring surface of the column body (12), the first annular convex edge (121) is clamped in the first annular groove (522), and the second annular convex edge (53) is clamped in the second annular groove (21).
2. The cotter pin assembly of claim 1, wherein: the annular folded edge (52) is of a hollow structure and is provided with a cavity (521); the cavity (521) is provided with an opening (5211) which penetrates through the inner ring surface of the annular folded edge (52) and surrounds the inner ring surface circumferentially.
3. The cotter pin assembly of claim 2, wherein: the first annular groove (522) is provided with a plurality of through holes (5221) communicated with the cavity (521) of the annular flange (52).
4. The cotter pin assembly of claim 1, wherein: the spherical shell (2) is formed by folding two half shells (22).
5. The cotter pin assembly of claim 4, wherein: the outer ring surface of the spherical shell (2) is provided with a third annular groove (23), and an elastic ring (6) is clamped in the third annular groove (23).
6. The cotter pin assembly of claim 5, wherein: a first through hole (24) is formed in the side wall of the spherical shell (2), a second through hole (31) is formed in the side wall of the elastic sleeve (3), and a third through hole (41) is formed in the side wall of the sheath (4); the first through hole (24), the second through hole (31) and the third through hole (41) are matched with each other, and a channel for communicating the outside with the inner annular surface of the spherical shell (2) can be formed; and a hole sealing piece (42) is arranged at the position of the third through hole (41) close to the outer ring surface of the sheath (4).
7. The cotter pin assembly of claim 1, wherein: the elastic sleeve (3) is made of elastic polyurethane material.
8. The cotter pin assembly of claim 1, wherein: the two ends of the inner annular surface of the sheath (4) are respectively provided with a fourth annular groove (43), the outer circle of the annular base plate (51) of the sealing cover (5) is provided with an elastic annular edge (54), and the elastic annular edge (54) is clamped in the corresponding fourth annular groove (43).
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| CN202110278540.6A CN112664552B (en) | 2021-03-16 | 2021-03-16 | Pin-penetrating type ball pin assembly and polyurethane composite material used for same |
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| CN112664552B true CN112664552B (en) | 2021-06-04 |
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