CN112013021B

CN112013021B - Roller skate and roller skate forming method

Info

Publication number: CN112013021B
Application number: CN202010779220.4A
Authority: CN
Inventors: 周志壮
Original assignee: Zhuangda Technology And Industry Hangzhou Co ltd
Current assignee: Zhuangda Technology And Industry Hangzhou Co ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2022-06-17
Anticipated expiration: 2040-08-05
Also published as: CN112013021A; CN115419653A

Abstract

The invention discloses a roller skate and a forming method thereof, wherein the roller skate comprises: the center of the wheel core is provided with a mounting hole for mounting a bearing; the wheel carrier is provided with two side plates which are oppositely arranged at intervals, the wheel core is positioned in the two side plates, and the inner surfaces of the side plates at the part matched with the wheel core are flat; the bearing is rotationally connected with the side plate through a rotating shaft and comprises an inner ring and an outer ring, a rolling body is arranged between the inner ring and the outer ring, the bearing is bilaterally symmetrically arranged in the mounting hole, and the outer ring is in contact with the hole wall of the mounting hole; the inner ring of the bearing is symmetrically extended with a first boss and a second boss to two sides, the second bosses of the two bearings in the mounting hole are inwards and abutted, and the first bosses outwards protrude out of the mounting hole and abut against the inner side surface of the wheel carrier. The first lug boss of the bearing replaces an inner lug which is used for abutting against the bearing on the inner side surface of the traditional wheel carrier, so that the processing cost of the wheel carrier without the inner lug is reduced sharply, and the skidding speed is also improved easily.

Description

Roller skate and roller skate forming method

Technical Field

The invention relates to the technical field of sports goods, in particular to the field of roller skates, and particularly relates to a roller skate and a forming method of the roller skate.

Background

In order to increase the speed of the roller skate on the track, the straightness and smoothness of rotation of the row wheels are particularly important, and when the bearings are installed on the roller skate in the market at present, as shown in fig. 13, a bearing sleeve 7 is arranged between the two bearings in order to ensure that the distance between the two bearings can accurately reach 10 mm; when the gang wheel is assembled on the wheel frame, in order to ensure that the gang wheel does not rub the wheel frame to reduce the speed and brake when rotating, an inner lug is required to be arranged on the inner side of the wheel frame and the inner lug 303 is abutted against the inner ring of the bearing; therefore, the conventional roller skate has to increase unnecessary tolerance, which makes it difficult to ensure the straightness of the roller during rotation, and increases the processing cost of the roller frame, and even more, when the roller is assembled to the roller frame, the excessive extrusion of the inner lug of the roller frame to the inner ring of the bearing causes the change of the bearing clearance, thereby causing the roller not to smoothly rotate.

Disclosure of Invention

In order to solve the technical problems, the invention provides the roller skate convenient to process, the roller skate is provided with the convex boss on the bearing, so that the boss is abutted to the wheel carrier side plate, the boss replaces an inner lug which is previously processed on the wheel carrier side plate, the processing of the wheel carrier side plate is simplified, the bearing can be processed into a standard part through mold opening, the assembly is more convenient, and the cost of the roller skate can be reduced.

Further provides a method for forming the roller skate.

The technical scheme of the invention is realized as follows:

a roller skate, comprising:

the center of the wheel core is provided with a mounting hole for mounting a bearing;

the wheel carrier is configured as a main body support of the roller skate and is provided with two side plates which are oppositely arranged at intervals, the wheel core is positioned in the two side plates, and the inner surfaces of the side plates at the part matched with the wheel core are flat;

the bearing is rotationally connected with the side plate through a rotating shaft and comprises an inner ring and an outer ring, a rolling body is arranged between the inner ring and the outer ring, the bearing is bilaterally symmetrically arranged in the mounting hole, and the outer ring is in contact with the hole wall of the mounting hole; the inner ring of the bearing is symmetrically extended with a first boss and a second boss to two sides, the second bosses of the two bearings in the mounting hole are inwards and abutted, and the first bosses outwards protrude out of the mounting hole and abut against the inner side surface of the wheel carrier.

In short, the first lug boss of the bearing replaces an inner lug which is used for abutting against the bearing and is arranged on the inner side surface of the traditional wheel frame, and the inner lug is the main reason of high processing cost of the wheel frame, so that the processing cost of the wheel frame without the inner lug is sharply reduced; because the machining precision of the bearing is higher, the straightness of the row wheel is relatively easy to control, and the skidding speed is also easy to improve.

Particularly, the first boss of the bearing protrudes out of the mounting hole and can be contacted with the inner side surface of the wheel carrier, so that an inner lug on the inner side surface of the wheel carrier does not need to be machined, and the machining cost of the wheel carrier is greatly reduced; because the bearing is more accurately machined relative to the wheel frame, compared with the inner lug of the traditional wheel frame, the first lug boss of the bearing has higher precision, and the linearity of the row wheel during rotation is more effectively ensured; because the second boss extends on the inner ring of the bearing, compared with the traditional bearing, a spacing element, namely a bearing sleeve, is omitted, the tolerance of the spacing is optimized, the movement of steel balls of the bearing in a normal clearance is guaranteed, the maximum flexibility of the transmission of the row wheel is also guaranteed, the straightness of the row wheel during rotation is also guaranteed, and the stability and the speed advantage of the wheel-sliding race are greatly increased.

Preferably, a convex ring extends towards the center on the inner wall of the mounting hole, and the two bearings are respectively installed into the mounting hole from two sides of the convex ring.

Preferably, the bearing outer ring is in interference fit with the mounting hole. The purpose is to keep the bearing outer ring and the mounting hole relatively static through friction force, no relative sliding exists between the bearing outer ring and the mounting hole, when the wheel rotates under stress, the kinetic energy loss obtained by the bearing is smaller, and the rotation efficiency of the row wheel is higher.

Preferably, the thickness of the protruding ring is equal to the sum of the lengths of the two second bosses. Therefore, the bearing installation is more convenient and accurate, and the two second bosses are just abutted after the two bearings are installed.

Preferably, the wheel core comprises a spoke, a hub positioned at the center of the wheel core and a rim positioned at the outermost side of the wheel core, and the spoke is connected with the hub and the rim.

A method for forming a roller skate comprises the following steps:

the bearing is prefabricated, the bearing comprises an inner ring and an outer ring, a rolling body is arranged between the inner ring and the outer ring, and a first boss and a second boss symmetrically extend towards two sides of the inner ring of the bearing;

secondly, the two bearings are symmetrically installed in the mounting holes of the wheel core, the first bosses of the two bearings in the mounting holes protrude out of the mounting holes, and the second bosses are inward and abutted;

and thirdly, the wheel core is arranged between two pre-formed wheel carrier side plates, the first lug boss is in butt fit with the inner side surfaces of the wheel carrier side plates, and a pin shaft penetrates into the bearing and is assembled with the wheel carrier side plates.

Preferably, the thickness of the wheel core is 15mm-21mm, and the thickness of the wheel core is not more than the sum of the thicknesses of the two bearings; the double-layer waist hole structure is arranged outside the wheel core and used for preventing the tire tread from peeling off, and the double-layer waist hole structure is arranged along the circumferential direction of the wheel core and is poured with the tire tread made of high polymer materials. After the wheel core is thinned, the whole weight of the roller skate is reduced, and when the roller skate wheel vertically and linearly rolls, the area of the roller skate wheel contacting the ground is smaller, and the roller skate is similar to a straight line, so that the thinned wheel core has a huge speed advantage; the double-layer waist hole structure enables the roller skate to have elasticity on a physical structure, and a user can have more buffer when falling to the ground in the air.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

the invention has the following concept and beneficial effects:

1. the inner ring of the bearing is provided with the first lug boss protruding out of the mounting hole, and the first lug boss can replace the inner surface of the traditional wheel carrier and is used for an inner lug abutting against the bearing, so that the inner side surface of the wheel carrier can be made into a flat plane; the convex rings on the traditional wheel carrier are different due to the low-cost processing, and the straightness of the wheel pulley cannot be ensured; even during assembly, the convex ring excessively extrudes the inner ring of the traditional bearing to cause the inner ring to be dislocated, so that the clearance of the traditional bearing is changed, the rotation of the pulley and the pulley is not smooth, and the use is greatly influenced; and the machining precision of the bearing is higher, so that the precision of the first boss of the bearing is higher than that of an inner lug of a traditional wheel frame, the straightness of the row wheel is relatively easy to control, and the skidding speed is also easy to improve.

2. The bearing has convex second boss, and back in two bearings are installed to the mounting hole, the second boss of two bearings offset, consequently compare in traditional bearing, saved the interval component, the bearing housing promptly, optimized the tolerance of interval, ensured the steel ball of bearing and moved in normal play, also ensured the largest flexibility of gang wheel transportation simultaneously, straightness accuracy when also guaranteeing the gang wheel rotation, greatly increased stability and speed advantage when the wheel is slided and is racing.

3. Because the first lug bosses and the second lug bosses which protrude outwards on the left side and the right side of the bearing are symmetrical, when the bearing is installed in the installation hole, the front side and the back side of the bearing do not need to be distinguished, and the installation operation is simple and quick; and the special design of the bearing is adopted, so that the die sinking and the processing are more convenient.

4. After the wheel core is thinned, the whole weight of the roller skate is reduced, and when the roller skate wheel vertically and linearly rolls, the area of the roller skate wheel contacting the ground is smaller, and the roller skate is similar to a straight line, so that the thinned wheel core has a huge speed advantage, and the roller skate wheel is matched with the installation design of the bearing and the wheel carrier side plate, so that the wheel rotates more smoothly, and under the action of the same friction force, the rotating time of the wheel is longer, and the roller skate wheel travels farther; meanwhile, the double-layer waist hole structure enables the roller skate to have elasticity in physical structure, and a user can have more buffer when falling to the ground in the air.

Drawings

FIG. 1 is a schematic perspective view of a bearing and a wheel core of an embodiment of the present invention after assembly;

FIG. 2 is a side view of the bearing and wheel core of an embodiment of the present invention after assembly;

FIG. 3 is a cross-sectional view of a bearing and wheel core assembly of an embodiment of the present invention;

FIG. 4 is a perspective view of a bearing and wheel core assembly of an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a bearing and wheel core assembly of an embodiment of the present invention;

FIG. 6 is a side view of a wheel core in an embodiment of the present invention;

FIG. 7 is a schematic perspective view of a wheel core according to an embodiment of the present invention;

FIG. 8 is a perspective sectional view of a wheel core in an embodiment of the present invention;

FIG. 9 is a perspective view of the assembly of the wheel core rotation structure and the wheel frame according to the embodiment of the present invention;

FIG. 10 is a top view of the assembly of the wheel core rotation structure and the wheel frame in the embodiment of the present invention;

FIG. 11 is a sectional view showing the assembly of the wheel core rotating structure and the wheel frame in the embodiment of the present invention;

FIG. 12 is a perspective view of a skate according to an embodiment of the present invention;

fig. 13 is a sectional view showing a combination of a conventional bearing and a conventional wheel carrier.

The figures are numbered: a wheel core 1; a spoke 101; a hub 102; a rim 103; a fastening structure 2; a first loop 201; a second loop 202; a waist hole 203; a rib post 204; a wheel carrier 3; a pin hole 301; a truck side plate 302; a convex ring 303; PU material 4; a bearing 5; an inner ring 501; an outer ring 502; a first boss 503; a second boss 504; mounting holes 104; a convex ring 105; a pin 6; and a bearing sleeve 7.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiment of the invention is as follows:

as shown in fig. 1, the present invention firstly provides a wheel core rotation structure, which includes a wheel core 1 and a bearing 5. In the present embodiment, the length in the axial direction of the wheel core 1 is referred to as the thickness.

The roller skating industry develops to mature gradually, and the roller skating product tends to be stable; this has resulted in all of the roller skates being discordant, and although the appearance is constantly changing, the core thereof, such as the thickness of the wheel rollers, the bearings used, etc., has not been much improved for a long time.

The qualification of the pulley needs to pass a set of specific tests to check whether the key performances such as service life, wear resistance and the like meet the requirements; due to the limited technology in the past, in order to pass the test, the standard wheel pulleys have the thickness of 24mm, under the same structure, the strength of the pulley with larger thickness is stronger than that of the pulley with smaller thickness, and most manufacturers can fix the thickness of the wheel at 24mm for production without considering the problem of how to reduce the thickness of the wheel; therefore, the reduction of the thickness of the wheel pulley is a great improvement to the wheel-sliding industry, and the improvement has important significance to production and wheel-sliding games.

In order to improve the quality of the wheel pulley, the thickness of 24mm passing through the world is reduced to 16mm under the premise that the used material is unchanged, the wheel testing condition is unchanged, and the testing result is also unchanged, and the mass of a single wheel is reduced by more than 30%; the invention is based on the skiving of the pulley and further improves the bearing 5.

Specifically, as shown in fig. 1-6, a mounting hole 104 for mounting the bearing 5 is formed in the center of the wheel core 1, a convex ring 105 extends towards the center on the inner wall of the mounting hole 104, and the thickness of the convex ring 105 is 3.2 mm; the bearing 5 comprises an inner ring 501 and an outer ring 502, a rolling body is arranged between the inner ring 501 and the outer ring 502, the rolling body can be a steel ball, a roller pin or the like, the rolling body arranged between the inner ring 501 and the outer ring 502 is not limited, the outer ring 502 is fixedly connected with the mounting hole 104, namely the bearing 5 is in interference fit with the mounting hole 104, the bearing 5 is pressed into the mounting hole 104, and the bearing can be fixedly connected by means of friction force.

In the embodiment, the thickness of the convex ring 105 is 3.2mm, so that the second bosses 504 of the two bearings 5 can abut against each other after being assembled, the thicknesses of the first bosses 503 and the second bosses 504 are both set to be 1.6mm, and the thickness of the outer ring 502 is the same as that of the conventional bearing 5 and is 7mm, so that the total thickness of the inner ring 501 is 10.2 mm; the two bearings 5 are respectively installed into the installation hole 104 from two sides of the convex ring 105, as shown in fig. 4 and 5, at this time, the outer rings 502 of the two bearings 5 are abutted against the convex ring 105, meanwhile, the second bosses 504 of the two bearings 5 are abutted against, the first bosses 503 protrude out of the wheel core 1, and the bearings 5 and the installation hole 104 are in interference fit.

As shown in fig. 13, compared with the conventional bearing, the conventional bearing has the same thickness of the inner ring and the outer ring, and a spacing element, i.e., a bearing sleeve 7, needs to be arranged between the two bearings to ensure the spacing between the two bearings so that the bearings can work normally; the thickness of the inner rings 501 of the two bearings 5 is increased in a two-way mode until the bearings 5 are assembled into the mounting holes 104, the inner rings 501 of the two bearings 5 can abut against each other to replace a spacing element, so that the tolerance of the spacing is optimized, the straightness is guaranteed, the steel balls of the bearings 5 can move in a normal clearance, and the maximum flexibility of the running of the row wheel is guaranteed.

In addition, the wheel core rotating structure also comprises a high polymer material arranged outside the wheel core 1, wherein the high polymer material is a PU material 4, and the PU material 4 forms a tread outside the wheel core 1; the wheel core 1 further comprises spokes 101, a hub 102 at the center of the wheel core 1 and a rim 103 located at the outermost side of the wheel core 1, wherein the spokes 101 radiate outwards from the hub 102 in a crotch shape and are connected to the inner side surface of the rim 103; the fastening structure 2 for preventing the PU material 4 from being peeled off due to lateral force is arranged outside the rim 103, the fastening structure 2 is arranged along the axial direction of the wheel core 1, and the fastening structure 2 and the wheel core 1 are integrally formed.

As shown in fig. 6-8, the fastening structure 2 is provided in consideration of how to prevent the tread from falling off from the wheel core 1 when the tread is subjected to a large lateral force, such as braking or cornering during racing, on the basis of the skived wheel, so as to avoid causing a serious accident; the fastening structure 2 is a double-layer waist hole structure, and comprises a first ring 201 close to the rim 103 and a second ring 202 far away from the rim 103, the first ring 201 and the second ring 202 are arranged at the middle position outside the rim 103 and distributed outwards layer by layer along the radial direction of the wheel core 1, and a plurality of waist holes 203 uniformly distributed along the circumferential direction of the wheel core 1 are arranged between the first ring 201 and the rim 103 and between the second ring 202 and the first ring 201; when pouring PU material 4 outside wheel rim 103, PU material 4 waters with fastening structure 2 and combines and form the tread, because the existence of double-deck waist hole, wheel core 1 and macromolecular material's combined area greatly increased, and the anti performance of shelling promotes, makes the wheel pulley more firm when changing the contained angle to ground.

A rib column 204 is formed between the two waist holes 203 in the same layer, namely the rib column 204 separates the waist holes 203 in the same layer; the rib columns 204 between the first ring 201 and the second ring 202 and the rib columns 204 between the first ring 201 and the rim 103 are arranged in a staggered manner along the circumferential direction, that is, the rib columns 204 between the first ring 201 and the second ring 202 are corresponding to the waist holes 203 between the first ring 201 and the rim 103 towards the center of the circle, so that each angle of the fastening structure 2 has a compressible or deformable space, and thus the wheel core 1 has physical structure elasticity, if the rib columns 204 of the upper layer and the lower layer are opposite, the position becomes a solid structure which is difficult to deform, the whole elasticity is not uniform, and a user is likely to feel abnormal feeling during traveling when using the wheel core.

As shown in fig. 8, in order to achieve the principle of light weight, the thickness of the rim 103 is greater than the thickness of the first ring 201, and the thickness of the first ring 201 is greater than the thickness of the second ring 202, so as to reduce the weight of the fastening structure 2 as much as possible and prevent the fastening structure 2 from becoming a ring which hinders light weight reduction.

As shown in fig. 13, the problem derived from the same thickness of the inner and outer races of the conventional bearing is that the inner surface of the conventional wheel carrier must be provided with a convex ring 303, i.e., an inner lug, for abutting against the inner race of the conventional bearing, and the convex ring 303 is a reason for high mold opening and processing costs of the conventional wheel carrier, and the convex ring 303 on the same wheel carrier is different due to the low-cost processing, so that the linearity of the rotation structure of the wheel core cannot be ensured; even during assembly, the convex ring 303 excessively extrudes the inner ring of the traditional bearing to enable the inner ring to be staggered, so that the clearance of the traditional bearing is changed, the wheel is unsmooth in rotation, and the use is greatly influenced.

Therefore, as shown in fig. 9-12, there is further provided a roller skate, which comprises a wheel frame 3 and the above-mentioned wheel core rotating structure, wherein the wheel is rotatably connected with the wheel frame 3; the inner side surface of the wheel frame 3 is flat, the second lug boss 504 of the bearing 5 is abutted against the inner side surface of the wheel frame 3, the processing cost of the wheel frame 3 is sharply reduced, the straightness of the rotation of the row wheel is relatively easy to control, and the wheel skidding speed is also easy to improve.

After the bearing 5 and the pulley are assembled, the pulley is mounted on the wheel frame 3: the lower part of the wheel carrier 3 is provided with a pin hole 301, a bearing hole is aligned with the pin hole 301 and then is fixedly connected through inserting a pin shaft 6, and the pin shaft 6 is a pair of locking screws; since the bearing 5 has the second boss 504, the second boss 504 of the bearing 5 abuts against the inner side surface of the wheel frame 3 at this time to prevent the wheel pulley from rubbing against the wheel frame 3 when rotating.

Therefore, the improved roller and the roller shoes greatly save the production and processing cost and save the materials; in the aspect of performance, the lighter and thinner roller skate reduces the weight of the whole roller skate, so that the user experience is improved, and the speed advantage in competition is increased; the advantages of using this bearing 5 are: unnecessary tolerance is removed, the installation is more accurate, the clearance of the bearing 5 is not changed, and the straightness of the wheel pulley on the wheel frame 3 is ensured, so that the wheel pulley can rotate on the wheel frame 3 more smoothly, and the competitiveness in the competition is increased; the design of double-deck waist hole has increased the combination area of tread and wheel core 1, makes wheel pulley more firm when changing the contained angle to the ground, has increased wheel pulley's structural elasticity simultaneously.

It is clear that the core of the invention lies in the reduction of the thickness of the pulley, from 24mm to 16mm, but this does not represent that other thicknesses of pulley are not suitable; although the above features have been developed for the purpose of normal use of the wheel with a reduced thickness, they are also applicable to 24mm thick wheels and other wheel pulleys of other thicknesses.

Aiming at the wheel core rotating structure and the roller skate, a method for improving the rotating smoothness of the roller skate is provided:

firstly, manufacturing the bearing 5 in advance, wherein the manufacturing of the bearing 5 is generally carried out by a bearing manufacturing factory; the requirements of the bearing 5 are as follows: the novel bearing comprises an inner ring 501 and an outer ring 502, balls are arranged between the inner ring 501 and the outer ring 502, a first boss 503 and a second boss 504 extend from the inner ring 501 to two sides along the axial direction, the thickness of the outer ring 502 is 7mm, the thickness of the inner ring 501 (including the thickness of the first boss and the second boss) is 10.2mm, and the thickness of the first boss and the thickness of the second boss are both 1.6 mm.

Secondly, the two bearings 5 are symmetrically arranged in the mounting holes 104 of the wheel core 1, and when the bearings 5 are arranged, the front and back sides of the bearings are not required to be distinguished due to the fact that the first bosses and the second bosses of the bearings 5 are symmetrical; the first bosses 503 of the two bearings 5 in the mounting hole 104 are both protruded outwards from the mounting hole 104, and the second bosses 504 are both inwards and abutted.

Thirdly, the wheel core 1 is arranged between two wheel carrier side plates 302 which are formed in advance, and the wheel carrier side plates 302 can be formed through punch forming or turning and milling; the first boss 503 is in abutting fit with the inner side surface of the wheel frame side plate 302, and a pin shaft 6 is introduced into the bearing 5 and assembled with the wheel frame side plate 302.

Claims

1. A roller skate, comprising:

2. The skate of claim 1, characterized by: a convex ring extends towards the center on the inner wall of the mounting hole, and the two bearings are respectively installed into the mounting hole from two sides of the convex ring.

3. The skate of claim 1, characterized by: and the bearing outer ring is in interference fit with the mounting hole.

4. The skate of claim 2, characterized by: the thickness of the convex ring is equal to the sum of the lengths of the two second bosses.

5. The skate of claim 1, characterized by: the wheel core comprises a spoke, a hub positioned at the center of the wheel core and a rim positioned on the outermost side of the wheel core, wherein the spoke is connected with the hub and the rim.

6. A method for forming a roller skate, comprising:

the bearing comprises an inner ring and an outer ring, a rolling body is arranged between the inner ring and the outer ring, and a first boss and a second boss symmetrically extend towards two sides of the inner ring of the bearing;

7. The method of forming a skate of claim 6, wherein: the thickness of the wheel core is 15mm-21mm, and the thickness of the wheel core is not more than the sum of the thicknesses of the two bearings; the double-layer waist hole structure is arranged outside the wheel core and used for preventing the tire tread from peeling off, and the double-layer waist hole structure is arranged along the circumferential direction of the wheel core and is poured with the tire tread made of high polymer materials.