CN214271193U

CN214271193U - Supporting structure and plastic circular weaving machine using same

Info

Publication number: CN214271193U
Application number: CN202022401186.5U
Authority: CN
Inventors: 陈达; 陈上利
Original assignee: Wenzhou Yike Plastic Machinery Co ltd
Current assignee: Wenzhou Yike Plastic Machinery Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-09-24
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a bearing structure and use its plastics circular weaving machine, including base, bearing, axis of rotation, cylinder, retaining member, the axis of rotation passes through in the rotatable level of bearing locates the base, the axis of rotation includes non-coincident bearing portion, rotating part, the rotatable base axle bed of locating of bearing portion, the cylinder passes through retaining member and rotating part rigid coupling as an organic whole. The roller body replaces a bearing type roller in the existing plastic circular weaving machine, the overall rotation effect is effectively improved, the colloid which is directly transferred to the roller body by heat is overcome, and the plastic circular weaving machine has the technical effects of optimized structure and reliable support.

Description

Supporting structure and plastic circular weaving machine using same

Technical Field

The utility model relates to a plastic knitting machine technical field, concretely relates to bearing structure and use its plastics circular loom.

Background

In the existing plastic circular weaving machine, a roller or a roller is arranged between an upper door ring and a lower door ring to form a rolling track for a shuttle to run, the roller or the roller is connected with the upper door ring and the lower door ring through a rotating shaft, meanwhile, a shaft sleeve is arranged on the rotating shaft to axially position the roller or the roller and support the upper door ring and the lower door ring, the distance between the upper door ring and the lower door ring is ensured, when the damaged roller or roller needs to be replaced, the rotating shaft can be taken down only by increasing the distance between the upper door ring and the lower door ring, then the roller and the roller can be replaced, particularly, when a small amount of rollers or rollers need to be replaced, all the rotating shafts and the upper door ring also need to be detached, the upper door ring can be lifted up, time and labor are wasted, the use cost is greatly increased, and the plastic circular weaving machine is not beneficial to product popularization and sale.

In view of the above, the applicant has already applied a plastic circular weaving machine to overcome the above-mentioned defects, and although the plastic circular weaving machine can facilitate the replacement of the roller and protect the roller, and meet the intended purpose, the technical solution of the plastic circular weaving machine is not perfect enough, and there is room for improvement.

In view of the above, a technical problem to be solved by those skilled in the art is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bearing structure and use its plastics circular loom to at least, solve among the prior art technical problem that the bearing mechanism rolling element changes and life.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a supporting structure, includes base, bearing, axis of rotation, the cylinder of rolling, retaining member, the axis of rotation passes through in the rotatable level of bearing locates the base, the axis of rotation includes non-coincident bearing portion, rotating part, the rotatable base axle bed of locating of bearing portion is interior, the cylinder of rolling passes through retaining member and rotating part rigid coupling as an organic whole.

Furthermore, the middle part of the rotating shaft is provided with a bearing part, the two ends of the rotating shaft are provided with rotating parts, the shaft seat in the middle of the base is supported on the bearing part of the rotating shaft, the roller bodies are fixedly connected to the two ends of the rotating shaft through the locking parts, and the section of each roller body is a supporting surface.

Furthermore, the middle part of the rotating shaft is a rotating part, the two ends of the rotating shaft are bearing parts, shaft seats at the two ends of the base are supported on the bearing parts of the rotating shaft, the roller body is fixedly connected to the middle part of the rotating shaft through a locking part, and the section of the roller body is a supporting surface.

Further, the bearing outer ring sets firmly in the base axle bed, the axis of rotation sets firmly in the bearing inner race, and the bearing outer ring rotates with the bearing inner race relatively, sets gradually retaining member, bearing inner race, the roller body, bearing inner race, retaining member in the axis of rotation, or sets gradually retaining member, roller body, bearing inner race, the roller body, retaining member.

Further, the base includes two connecting seats that the symmetry set up, and the connecting seat is the U-shaped component, has first vertical portion and the vertical portion of second at horizontal part and horizontal part both ends, and the base is as an organic whole through the laminating rigid coupling of the outer terminal surface of first vertical portion.

Further, the outer end face of the first vertical portion is attached to form a base middle shaft seat, a first groove for containing the bearing is formed in the outer end face of the first vertical portion, and a second groove for containing the roller body is formed in the inner end face of the first vertical portion.

Further, the base includes two connecting seats that the symmetry set up, and the connecting seat has the first vertical portion and the third vertical axle bed between the vertical portion of second and first vertical portion and the vertical portion of second at horizontal part and horizontal part both ends, and the third vertical axle bed is close to first vertical portion.

Further, the base is fixedly connected into a whole through the outer end face of the first vertical portion in an attaching mode, two third vertical shaft seats of the connecting seat form a base middle shaft seat, the third vertical shaft seats are provided with bearing mounting holes, the first vertical portion is provided with through holes, and the rotating shaft penetrates through the through holes in a non-contact mode.

Further, the base is provided with a horizontal portion, second vertical portions at two ends of the horizontal portion and a third vertical shaft seat between the second vertical portions at two ends, the number of the third vertical shaft seats is one, the third vertical shaft seats are arranged between the second vertical portions at two ends in the middle, or the number of the third vertical shaft seats is two, and the third vertical shaft seats are close to the second vertical portions and are arranged at two ends of the horizontal portion.

Further, the roller body is the notch cuttype structure, including the roller forebody and the roller afterbody of an organic whole structure, the roller afterbody diameter of a circle is greater than roller forebody diameter of a circle, roller forebody and the coaxial setting of roller afterbody, the roller tangent plane is the holding surface.

Furthermore, the outer diameter of the roller rear body is coated with a colloid, when the roller body and the bearing inner ring are fixedly connected to the rotating shaft, the roller front body extends into a second groove on the connecting seat, and the outer diameter of the roller rear body is larger than the inner diameter of the second groove or the shaft seat hole.

The utility model also provides a plastics circular loom, including last door ring, lower door ring, shuttle, still include as above bearing structure, go up the door ring and distribute to be equipped with down circumference between the door ring bearing structure, bearing structure connects respectively at the bearing structure both ends and connects door ring and lower door ring, bearing structure's cylinder roll supports the shuttle.

The utility model has the advantages of as follows:

1. the utility model discloses hold the intracavity with the bearing setting at the base, be promptly for two connecting seats cooperate the intracavity of holding on the terminal surface of connecting, or the base that singly sets up holds the intracavity, the roller body rotates with the axis of rotation is integrative, does not set up the bearing in the roller body, has overcome the bearing rotation and has generated heat and lead to the fact ageing crackle technical problem to the outside colloid heat transfer of gyro wheel.

2. The utility model discloses replace the bearing formula gyro wheel among the prior art with the cylinder, effectively promote whole rotation efficiency to and overcome the direct colloid that transmits to the cylinder of heat, have structural optimization, support reliable technological effect.

3. The utility model discloses the axis of rotation is worn to establish on the bearing hole, and the roller body is established outside the pivot again, and the retaining member passes the roller body again and is connected to the pivot hole, and is integrative with pivot threaded connection, and the change of roller body need not repeatedly dismantle all the other axis of rotation and last door circle, only dismantles partial inefficacy roller body and can realize the overall maintenance, has and changes convenient operation, maintains simple, swift, efficient technological effect; or two fixing screws for connecting the supporting structure with the upper door ring and the lower door ring are loosened, the supporting structure is integrally taken down, the roller body is replaced after the supporting base is disassembled, the roller body and the bearing in the cavity of the base are convenient to replace, and the assembling precision is achieved.

To more clearly illustrate the structural features and effects of the present invention, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic view of the overall three-dimensional structure of the present invention;

fig. 2 is a first structural schematic diagram of the disassembly assembly of the present invention;

FIG. 3 is a second schematic structural view of the disassembly assembly of the present invention;

fig. 4 is a third schematic structural view of the disassembly assembly of the present invention;

fig. 5 is a fourth schematic structural view of the disassembly assembly of the present invention;

fig. 6 is a schematic side view of the present invention;

fig. 7 is a schematic side view of another embodiment of the present invention;

fig. 8 is a schematic structural view of the plastic circular loom assembled with the present invention.

Reference numerals:

1. the roller type vertical shaft seat comprises a base 1.1, a horizontal portion 1.2, a first vertical portion 1.3, a second vertical portion 1.4, a third vertical shaft seat 2, a first groove 3, a bearing 4, a rotating shaft 5, a roller body 5.1, a roller front body 5.2, a roller rear body 6, a locking piece 7, a second groove 8, a through groove 9, a screw hole 10, a mounting hole 11, a gasket 01, a supporting structure 02, an upper door ring 03 and a lower door ring.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the present invention provides an optional embodiment, according to the present invention, a supporting structure 01 is provided, which comprises a base 1, a bearing 3, a rotating shaft 4, a roller body 5 and a locking member 6, wherein the rotating shaft 4 is disposed in the base 1 through the rotatable level of the bearing 3, the rotating shaft 4 comprises a non-coincident supporting portion and a rotating portion, the supporting portion is rotatably disposed in the base 1 shaft seat, the roller body 5 is integrally connected with the rotating portion through the locking member 6, and the tangent plane of the roller body 5 is a supporting plane.

The base 1 is provided with a horizontal part 1.1, a second vertical part 1.3 at two ends of the horizontal part 1.1 and a third vertical shaft seat 1.4 between the second vertical parts 1.3 at two ends, wherein the third vertical shaft seats 1.4 are one and arranged between the second vertical parts 1.3 at two ends in the center, or the third vertical shaft seats 1.4 are two and are arranged at two ends of the horizontal part 1.1 near the second vertical parts 1.3.

According to the utility model discloses a another kind of concrete implementation, bearing structure includes base 1, bearing 3, axis of rotation 4, and axis of rotation 4 is located in base 1 through the rotatable level of bearing 3, 4 middle parts of axis of rotation are the support portion, and both ends are the rotating part, and base 1 supports still includes roller body 5, retaining member 6 at the support portion of axis of rotation 4, and roller body 5 passes through the rotating part of the integrative rigid coupling in 4 both ends of axis of rotation of retaining member 6.

The roller bodies 5 are symmetrically sleeved at two ends of the rotating shaft 4, the roller bodies 5 and the rotating shaft 4 are coaxially arranged, the bearing 3 is coaxially arranged in the middle of the rotating shaft 4, and the cutting surface of the upper end of each roller body 5 is higher than the highest part of the base 1.

The outer ring of the bearing 3 is fixedly arranged in the middle shaft seat of the base 1 in the middle, the rotating shaft 4 is fixedly arranged on the inner ring of the bearing 3, two ends of the rotating shaft 4 extend out of the middle shaft seat of the base 1, and the outer ring of the bearing 3 and the inner ring of the bearing 3 rotate relatively.

And external threads or internal threads are arranged at two ends of the rotating shaft 4, the locking piece 6 rotates along the external threads or the internal threads from two ends of the rotating shaft 4 in opposite directions, and the roller body 5 and the inner ring of the bearing 3 are fixedly connected onto the rotating shaft 4.

Base 1 is including two connecting seats that the symmetry set up, and the connecting seat is the U-shaped component, has first vertical portion 1.2 and the vertical portion 1.3 of second at horizontal part 1.1 and horizontal part 1.1 both ends, and base 1 is as an organic whole through the outer terminal surface laminating rigid coupling of first vertical portion 1.2.

The first vertical part 1.2 is provided with a threaded hole which is horizontally arranged, and the two connecting seats are fixedly connected into a whole through a fastening piece screwed into the threaded hole.

The outer end face of the first vertical portion 1.2 is attached to form a middle shaft seat of the base 1, a first groove 2 for accommodating the bearing 3 is formed in the outer end face of the first vertical portion 1.2, and a second groove 7 for accommodating the roller body 5 is formed in the inner end face of the first vertical portion 1.2.

First recess 2 and second recess 7 on the first vertical portion 1.2 are cylindric cavity, and the cavity is coaxial and intercommunication, 2 radiuses of first recess are greater than 7 radiuses of second recess.

The first grooves 2 on the outer end faces of the first vertical portions 1.2 of the two connecting seats are matched to form a bearing containing cavity, and the bearing 3 is arranged in the containing cavity.

According to the utility model discloses a another kind of embodiment, base 1 is including two connecting seats that the symmetry set up, and the connecting seat has first vertical portion 1.2 and the vertical portion 1.3 of second and the vertical portion 1.2 of first vertical portion and the vertical portion 1.3 of second between the horizontal part 1.1 and horizontal part 1.1 both ends third vertical axle bed 1.4, and third vertical axle bed 1.4 is close to first vertical portion 1.2.

The base 1 is fixedly connected into a whole through the outer end face of the first vertical portion 1.2 in an attaching mode, the two third vertical shaft seats 1.4 of the connecting seat form a middle shaft seat of the base 1, the third vertical shaft seats 1.4 are provided with mounting holes for the bearings 3, second grooves 7 for containing the roller bodies 5 are formed in the inner end faces of the third vertical shaft seats 1.4, the first vertical portion 1.2 is provided with through holes, and the rotating shaft 4 penetrates through the through holes in a non-contact mode.

According to the utility model discloses a another kind of embodiment, 4 middle parts of axis of rotation are the rotating part, and both ends are the support, and 1 both ends axle bed of base supports at the support of axis of rotation 4, and the roller body 5 passes through the integrative rigid coupling of retaining member 6 in the middle part of axis of rotation 4.

According to the utility model discloses a another kind of embodiment, 3 outer rings of bearing set firmly in 1 axle bed of base, axis of rotation 4 sets firmly in 3 inner rings of bearing, and 3 outer rings of bearing rotate with 3 inner rings of bearing relatively, sets gradually retaining

member

6, 3 inner rings of bearing, the

cylinder

5, 3 inner rings of bearing, retaining member 6 in the axis of rotation 4, or sets gradually retaining member 6, the

cylinder

5, 3 inner rings of bearing, the cylinder 5, retaining member 6.

According to the utility model discloses a another kind of embodiment, the base is an overall structure, and both ends installation bearing does not set up through the mode that two part butt joints merge, specifically, establishes the axle bed hole in the axle bed both ends face is coaxial in the middle of the base, and the axle bed is downthehole to bearing inner race interference is located.

In addition, dust covers are installed at two ends of the shaft seat in the middle of the base.

According to another embodiment of the present invention, the roller body 5 is a stepped structure, including a roller front body 5.1 and a roller rear body 5.2 which are integrally formed, the outer diameter of the roller rear body 5.2 is greater than the outer diameter of the roller front body 5.1, the roller front body 5.1 is coaxially disposed with the roller rear body 5.2, and the roller front body 5.1 is located at one end or two ends of the roller rear body 5.2.

The outer diameter of the roller rear body 5.2 is coated with colloid, when the roller body 5 and the inner ring of the bearing 3 are fixedly connected on the rotating shaft 4, the roller front body 5.1 extends into the second groove 7 on the connecting seat, and the outer diameter of the roller rear body 5.2 is larger than the inner diameter of the second groove 7.

An open slot with an open upper end is formed in the inner end face of the second vertical portion 1.3, so that the mounting nut can be conveniently taken out through the open slot, and the support structure and the upper door ring and the lower door ring can be conveniently detached.

A through groove which is positioned right below the roller body 5 is formed in the bottom of the main body of the base 1, dust can be conveniently cleaned through the through groove, and meanwhile, the roller body can be used as an observation window for observing and checking whether colloid on the roller body is intact or not.

According to another embodiment of the present invention, a supporting structure is provided, which comprises a base 1, wherein a cavity is formed in the base 1; specifically, base 1 is including two connecting seats that the symmetry set up, offers first recess 2 including can supplying axle type part to set up on two connecting seat matched with the terminal surface of connecting, and its another terminal surface of keeping away from first recess 2 is offered second recess 7. Specifically, the two connecting seats are provided with screw holes 9 for fixing, and the two connecting seats are connected and fixed into a whole through screws penetrating through the screw holes 9 on the two connecting seats; specifically, the far end of the connecting seat is also provided with a mounting hole 10 which is positioned on the same central axis as the front end;

the bearing 3 is arranged in the cavity of the base 1, and the specific bearing 3 is arranged in the cavity formed by the first grooves 2 on the two connecting seats;

the rotating shaft 4, the rotating shaft 4 is worn and set up on the bore of the bearing 3;

a roller body 5, wherein the roller body 5 is sleeved on the outer shaft of the rotating shaft 4;

and the locking piece 6 is partially connected into the inner threaded holes at the two ends of the rotating shaft 4 through the roller body 5, the locking piece 6 is a T-shaped screw with external threads, or the locking piece 6 is partially connected to the outside of the outer threaded holes at the two ends of the rotating shaft 4 through the roller body 5, and the locking piece 6 is a nut with internal threads.

The first groove 2 and the second groove 7 are positioned on the same central axis and communicated with each other. The first groove 2 and the second groove 7 are cylindrical cavities, and the diameter of the first groove 2 is larger than that of the second groove 7.

The front end of the rotating shaft 4 passes through the second groove 7 on the connecting seat and is connected with the bearing 3 in the first groove 2.

The roller body 5 is of a T-shaped structure in the overall profile, and comprises a roller front body 5.1 and a roller rear body 5.2 which are of an integral structure, wherein the roller front body 5.1 and the roller rear body 5.2 are arranged on the same central axis.

The diameter of the roller rear body 5.2 is larger than that of the roller front body 5.1, wherein the outer diameter of the roller rear body 5.2 is coated with colloid.

The roller body 5 is integrally sleeved on the outer shaft at the rear end of the rotating shaft 4, and the roller precursor 5.1 extends into the second groove 7 on the connecting seat.

An internal thread is arranged at one end of the rotating shaft 4 far away from the bearing 3, and the locking part 6 penetrates through the roller body 5 and is in threaded connection with the rotating shaft 4 into a whole; the rod diameter of the locking piece 6 connected to the inner hole of the rotating shaft 4 is also provided with a gasket 11.

According to the utility model discloses a another embodiment provides a plastics circular weaving machine, including the host computer, the host computer includes door circle subassembly and shuttle, the door circle subassembly includes door circle 02 and lower door circle 03, upward is equipped with a plurality of foretell bearing structure 01 between door circle 02 and the lower door circle 03, bearing structure 01 is connected with the door circle subassembly through the mounting hole of the vertical portion of connecting seat second, bearing structure 01's cylinder 5 distributes and forms the roll track that supplies the shuttle operation along the circumference of door circle subassembly, and simultaneously, bearing structure 01 is used for keeping door circle 02 and lower door circle 03 interval.

The utility model discloses design bearing 3 and hold the intracavity to the base, for two connecting seats cooperate the appearance intracavity on the terminal surface of connecting, overcome the gyro wheel design that is equipped with the bearing in the original technique, that is to say need be with a gyro wheel internal design bearing in the original technique, therefore cause the structure not good.

The roller body 5 replaces a bearing type roller in the prior art, the whole rotation effect is effectively improved, the colloid directly transmitted to the roller body 5 by heat is overcome, and the service life of the roller colloid is prolonged.

The utility model discloses axis of rotation 4 is worn to establish on 3 holes of bearing, and the roller body 5 is established again and is established in the outer axle of pivot, and retaining member 6 passes roller body 5 again and is connected to the pivot hole on, and is integrative with pivot threaded connection, and all the other axis of rotation 4 and last door circle need not repeated dismantlement for the change of roller body 5, only dismantles partial inefficacy roller body 5 and can realize whole maintenance, has change convenient operation, maintains simple, swift, efficient technological effect.

In addition, on the basis of keeping the distance between the upper door ring and the lower door ring, the single supporting structure can be integrally disassembled, the invalid roller bodies can be independently replaced, the maintenance is simple and convenient, and the replacement time of the roller bodies is more than 1/2 compared with that of the prior art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. The invention is not limited to the embodiments described herein, but is capable of other embodiments with obvious modifications and variations, including those shown in the drawings and described herein. Therefore, the equivalent changes made according to the shape, structure and principle of the present invention should be covered in the protection scope of the present invention.

Claims

1. The utility model provides a supporting structure, includes base, bearing, axis of rotation, and the axis of rotation passes through the rotatable level of bearing and locates in the base its characterized in that: still include cylinder, retaining member, the axis of rotation includes non-coincident support portion, rotating part, the rotatable base axle bed of locating of support portion, the cylinder passes through retaining member and rotating part rigid coupling as an organic whole.

2. The supporting structure of claim 1, wherein the middle portion of the rotating shaft is a supporting portion, the two ends of the rotating shaft are rotating portions, the middle shaft seat of the base is supported on the supporting portion of the rotating shaft, the roller bodies are integrally fixed to the two ends of the rotating shaft by the locking members, and the cross section of each roller body is a supporting surface.

3. The supporting structure of claim 1, wherein the rotating shaft has a rotating portion at the middle portion thereof and supporting portions at the two ends thereof, the shaft seats at the two ends of the base are supported by the supporting portions of the rotating shaft, the roller body is integrally fixed to the middle portion of the rotating shaft by the locking member, and the cross section of the roller body is a supporting surface.

4. The support structure of claim 1, wherein the outer race is fixed in the pedestal shaft seat, the rotating shaft is fixed in the inner race, the outer race and the inner race rotate relatively, and the rotating shaft is provided with the locking member, the inner race, the roller body, the inner race and the locking member in sequence, or provided with the locking member, the roller body, the inner race, the roller body and the locking member in sequence.

5. The supporting structure of claim 2, wherein the base comprises two connecting seats symmetrically arranged, each connecting seat is a U-shaped member, each connecting seat comprises a horizontal part and a first vertical part and a second vertical part which are arranged at two ends of the horizontal part, and the base is fixedly connected into a whole through the outer end face of the first vertical part.

6. The support structure of claim 5, wherein the outer end surface of the first vertical portion is attached to form a middle shaft seat of the base, the outer end surface of the first vertical portion is provided with a first groove for accommodating the bearing, and the inner end surface of the first vertical portion is provided with a second groove for accommodating the roller body.

7. The support structure of claim 2, wherein the base includes two symmetrically disposed connecting seats having a horizontal portion and first and second vertical portions at both ends of the horizontal portion and a third vertical axis seat between the first and second vertical portions, the third vertical axis seat being proximate to the first vertical portion.

8. The support structure of claim 7, wherein the base is integrally and fixedly connected by an outer end surface of the first vertical portion, two third vertical shaft seats of the connecting seat form a base middle shaft seat, the third vertical shaft seats are provided with bearing mounting holes, the first vertical portion is provided with a through hole, and the rotating shaft passes through the through hole in a non-contact manner.

9. The support structure of claim 1, wherein the base has a horizontal portion and second vertical portions at both ends of the horizontal portion and a third vertical axis seat between the second vertical portions at both ends, the third vertical axis seat being one and centrally disposed between the second vertical portions at both ends, or two and centrally disposed at both ends of the horizontal portion near the second vertical portions.

10. The supporting structure of claim 1, wherein the roller body is a ladder-type structure and comprises a roller front body and a roller rear body which are integrally formed, the diameter of the roller rear body is larger than that of the roller front body, the roller front body and the roller rear body are coaxially arranged, and the section of the roller body is a supporting surface.

11. The support structure of claim 10, wherein the outer diameter of the roller rear body is coated with a colloid, and when the roller body and the bearing inner race are fixed on the rotating shaft, the roller front body extends into the second groove on the connecting seat, and the outer diameter of the roller rear body is larger than the inner diameter of the second groove or the shaft seat hole.

12. A plastic circular weaving machine comprises an upper door ring, a lower door ring and a shuttle, and is characterized in that: the shuttle car further comprises a supporting structure according to claims 1-11, wherein the supporting structure is circumferentially distributed between the upper door ring and the lower door ring, two ends of the supporting structure are respectively connected with the upper door ring and the lower door ring, and a roller body of the supporting structure supports the shuttle in a rolling manner.