Composite material roller, rear towing wheel structure and sewing machine

Abstract

The utility model discloses a composite material roller, a rear towing wheel mechanism and a sewing machine in the technical field of sewing machines, the composite material roller comprises a roller base body, and a containing groove is formed in the outer circumferential surface of the roller base body; the rubber layers are contained in the containing grooves, the working faces of the rubber layers and the outer circumferential face of the roller base body are coplanar, and the rubber layers and the roller base body are alternately distributed in the circumferential direction of the roller base body. The composite structure is adopted, in the circumferential rotation process, the rubber layer of the roller and the roller base body can alternately appear and make contact with cloth, abrasion of the rubber layer on the roller can be effectively reduced, scratches and linear grooves are avoided, and then the service life of the rear tug structure is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a composite material roller, a rear tug mechanism and a sewing machine. Background Art

[0002] A rear tug wheel structure can be installed at the needle and presser foot position of the sewing machine. The rear tug wheel structure corresponds to the rear of the needle and presser foot position. When sewing cloth, the rear tug wheel structure can be used to press against the cloth surface and feed the cloth out, thereby improving the smoothness of cloth feeding during sewing.

[0003] like Fig.11 As shown, a roller is installed on the rear tug structure installed on the sewing machine, and the roller includes a roller base 100 and a glue layer 200. The glue layer 200 is coated on the outer circumference of the roller base 100. The roller base 100 is made of metal, and the glue layer 200 is mostly made of rubber or plastic. During the sewing process, if the rear tug structure passes through a zipper or hard wire scene, the glue layer of the roller will be worn, and even a deep mark will be worn on the glue layer, which will greatly shorten the service life of the rear tug structure.

[0004] Therefore, how to reduce the wear of the roller and extend the service life of the rear tugboat structure has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a composite material roller to solve the technical problems of the existing roller of the rear tug structure being easy to wear and having a short service life.

[0006] The technical solution adopted by the utility model is: a composite material roller, comprising:

[0007] A roller base body, wherein a receiving groove is formed on the outer circumferential surface of the roller base body;

[0008] The adhesive layer is accommodated in the accommodating groove, the working surface of the adhesive layer is coplanar with the outer circumferential surface of the roller base, and in the circumferential direction of the roller base, the adhesive layer and the roller base are alternately distributed.

[0009] Preferably, there are a plurality of the accommodating grooves, and the plurality of the accommodating grooves are evenly spaced along the circumferential direction and distributed on the outer circumferential surface of the roller base.

[0010] Preferably, the accommodating groove is a V-shaped groove.

[0011] Preferably, the lowest point of the upper surface of the V-shaped groove is located below the lowest point of the side surface.

[0012] Preferably, the accommodating groove is a strip groove, and the angle between the length direction of the strip groove and the circumferential direction of the roller base is γ, and 0°<γ≤90°.

[0013] Preferably, the accommodating groove is a tooth groove, and the tooth groove is a straight tooth groove, an oblique tooth groove or a herringbone tooth groove.

[0014] Preferably, in the circumferential direction of the roller base, the rubber layers in two adjacent tooth grooves are fixedly connected.

[0015] Preferably, the accommodating groove is wider at the top and narrower at the bottom.

[0016] Preferably, the accommodating groove is an annular groove coaxially arranged with the roller base, a plurality of radial bosses are integrally formed in the annular groove, the rubber layer is accommodated in the accommodating groove and is located on the circumferential side of the radial boss, and the outer end surface of the radial boss is coplanar with the outer circumferential surface of the roller base.

[0017] Preferably, the cross-section of the radial boss is circular or polygonal.

[0018] Preferably, a radial hole communicating with the accommodating groove is formed on the roller base, a plunger is integrally formed on the side of the adhesive layer facing the working surface, and the plunger is fixedly disposed in the radial hole.

[0019] Preferably, the radial hole is a tapered hole, and the radial dimension of one end of the radial hole close to the axis of the roller base is larger than the radial dimension of one end of the radial hole away from the axis of the roller base.

[0020] Preferably, the working surface area of ​​the adhesive layer is 2 / 3 to 4 / 5 of the outer circumferential surface area of ​​the roller base.

[0021] Preferably, in the axial direction of the roller base, the adhesive layer and the roller base are alternately distributed.

[0022] Preferably, the adhesive layer is injection molded in the receiving groove.

[0023] The second purpose of the utility model is to provide a rear tugboat structure, which comprises the composite material roller mentioned above.

[0024] The third purpose of the present utility model is to provide a sewing machine, which includes the above-mentioned rear tugwheel structure.

[0025] Beneficial effects of the utility model:

[0026] The utility model adopts a composite structure, a receiving groove is formed on the outer circumferential surface of the roller base, a rubber layer is injection-molded in the receiving groove, and the working surface of the rubber layer is coplanar with the outer circumferential surface of the roller base. During the circumferential rotation, the rubber layer of the roller and the roller base can appear alternately and contact the cloth, which can effectively reduce the wear of the rubber layer on the roller, avoid the generation of scratches and linear grooves, and thus extend the service life of the rear tugboat structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the composite material roller of the utility model;

[0028] Figure 2 This is one of the three-dimensional schematic diagrams of the composite material roller of the utility model;

[0029] Figure 3 This is the second three-dimensional schematic diagram of the composite material roller of the utility model;

[0030] Figure 4 is a schematic structural diagram of a roller base;

[0031] Figure 5 is a top view of the roller base;

[0032] Figure 6 is a side view of the roller base;

[0033] Figure 7 It is the dimension drawing of the V-groove on the roller base;

[0034] Figure 8 The dimension drawing of the strip groove on the roller base;

[0035] Fig. 9 is a layout diagram of the radial boss in the annular groove on the roller base;

[0036] Fig.10 It is a three-dimensional schematic diagram of the rear tugboat structure;

[0037] Fig.11 It is a structural schematic diagram of an existing roller.

[0038] Description of reference numerals in the figures:

[0039] 100, roller base;

[0040] 110, receiving groove; 120, radial boss; 130, radial hole;

[0041] 200, glue layer;

[0042] 210. Plunger. DETAILED DESCRIPTION

[0043] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0047] Examples, such as Figure 1-Figure 10 As shown, a composite material roller comprises:

[0048] The roller base 100 has an accommodating groove 110 formed on its outer circumferential surface.

[0049] The adhesive layer 200 is accommodated in the accommodation groove 110 , the working surface of the adhesive layer 200 is coplanar with the outer circumferential surface of the roller base 100 , and in the circumferential direction of the roller base 100 , the adhesive layer 200 and the roller base 100 are alternately distributed.

[0050] The present application adopts a composite structure, and a receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The receiving groove 110 contains a rubber layer 200, and the working surface of the rubber layer 200 is coplanar with the outer circumferential surface of the roller base 100. During the circumferential rotation, the rubber layer 200 and the roller base 100 can appear alternately and contact the fabric, which can effectively reduce the wear of the rubber layer 200 on the roller, avoid the generation of scratches and linear grooves, and thus extend the service life of the rear tugboat structure.

[0051] In a specific embodiment, if Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, a composite material roller includes a roller base 100 and a rubber layer 200. An accommodating groove 110 is formed on the outer circumferential surface of the roller base 100. The accommodating groove 110 is a V-shaped groove, and the number of the V-shaped grooves is multiple. The multiple V-shaped grooves are evenly distributed on the outer circumferential surface of the roller base 100 along the circumferential direction of the roller base 100; the rubber layer 200 is accommodated in the V-shaped groove, and the working surface of the rubber layer 200 is coplanar with the outer circumferential surface of the roller base 100, that is, the end surface of the rubber layer 200 away from the axis of the roller base 100 is coplanar with the outer circumferential surface of the roller base 100.

[0052] Preferably, Figure 5 As shown, the lowest point of the upper surface of the V-shaped groove is located below the lowest point of the side surface, so that the adhesive layer 200 and the roller base 100 can be alternately distributed in the axial direction of the roller base 100.

[0053] Specifically, Figure 7 As shown, the width of the roller is d, that is, the axial dimension of the roller base 100 is d; wherein, the width of the adhesive layer 200 embedded on the roller base 100 is c, that is, the dimension of the adhesive layer 200 in the axial direction of the roller base 100 is c.

[0054] The size of the part of the roller base 100 in contact with the cloth is a, that is, in the circumferential direction, the spacing between two adjacent rubber layers 200 is a, the size of the rubber layer 200 is b, and b>a, so that the working surface area of ​​the rubber layer 200 is larger than the supporting surface area of ​​the outer surface of the roller base 100 in contact with the cloth. The angle between the two upper surfaces of the V-shaped groove is δ, point A is the intersection of the two upper surfaces of the V-shaped groove, and point B is the lowest point on both sides of the V-shaped groove. The angle δ needs to satisfy that point A is below point B. In this way, it can be ensured that in the direction of the roller axis, the rubber layer 200 and the roller base 100 are alternately distributed, that is, the metal material and the rubber or plastic material are alternately distributed.

[0055] In a specific embodiment, if Figure 3 and Fig. 9 As shown, a composite roller includes a roller base 100 and a rubber layer 200. An accommodating groove 110 is formed on the outer circumferential surface of the roller base 100. The accommodating groove 110 is a strip groove, and the number of the strip grooves is multiple. The multiple strip grooves are evenly spaced on the outer circumferential surface of the roller base 100 along the circumferential direction of the roller base 100. The angle between the length direction of the strip groove and the circumferential direction of the roller base 100 is γ, and 0°<γ≤90°; the rubber layer 200 is formed in the strip groove, and the working surface of the rubber layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0056] Specifically, Fig. 9 As shown, the strip groove is arranged along the axial direction of the roller base 100, and in the circumferential direction of the roller base 100, the groove width of the strip groove is j, and the distance between two adjacent strip grooves is h.

[0057] In a specific embodiment, if Figure 3 As shown, a composite roller comprises a roller base 100 and a rubber layer 200. An accommodating groove 110 is formed on the outer circumferential surface of the roller base 100. The accommodating groove 110 is a tooth groove. There are multiple tooth grooves. The multiple tooth grooves are evenly spaced on the outer circumferential surface of the roller base 100 along the circumferential direction of the roller base 100. The tooth groove can be a straight tooth groove, and the extension direction of the straight tooth groove is perpendicular to the circumferential direction of the roller base 100; the tooth groove can also be an oblique tooth groove, and the extension direction of the oblique tooth groove intersects with the roller base 100. The two ends of the tooth groove pass through the two end surfaces of the roller base 100. The rubber layer 200 is formed in the tooth groove, and the working surface of the rubber layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0058] In other embodiments, the tooth groove may also be in a herringbone shape.

[0059] Preferably, in the circumferential direction of the roller base 100, two connected tooth grooves are connected via a connecting groove (not shown in the figure), and after the rubber layer 200 is formed in the tooth groove, the rubber layers 200 in two adjacent tooth grooves are fixedly connected.

[0060] In a specific embodiment, if Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, a composite material roller includes a roller base 100 and a glue layer 200. A receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The glue layer 200 is received in the receiving groove 110, and the working surface of the glue layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0061] The receiving groove 110 is wider at the top and narrower at the bottom, that is, in the circumferential direction of the roller base 100 , the top dimension of the receiving groove 110 is larger than the bottom dimension of the receiving groove 110 .

[0062] Specifically, the inner wall surface of the receiving groove 110 has a draft angle; or the inner wall surface of the receiving groove 110 is arranged along the radial direction of the roller base 100 .

[0063] In a specific embodiment, if Figure 8As shown, a composite roller includes a roller base 100 and a rubber layer 200. A receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The receiving groove 110 is an annular groove coaxially arranged with the roller base 100, and a plurality of radial bosses 120 are integrally formed in the annular groove; the rubber layer 200 is accommodated in the annular groove and is located on the circumferential side of the radial boss 120, and the outer end surface of the radial boss 120 is coplanar with the outer circumferential surface of the roller base 100.

[0064] Preferably, the cross section of the radial boss 120 is circular or polygonal.

[0065] Specifically, Figure 8 As shown, the cross-section of the radial boss 120 is diamond-shaped, and a plurality of radial bosses 120 are distributed in an array in the annular groove. The length and width of the radial boss 120 are d×f, the spacing between two adjacent radial bosses 120 is e and g, the top angle of the radial boss 120 is ζ, and the position angle of the radial boss 120 is γ.

[0066] In a specific embodiment, if Figure 1 and Figure 6 As shown, a composite material roller includes a roller base 100 and a glue layer 200. A receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The glue layer 200 is received in the receiving groove 110, and the working surface of the glue layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0067] A radial hole 130 is formed on the roller base 100, and the radial hole 130 is arranged along the radial direction of the roller base 100, and the radial hole 130 communicates with the accommodating groove 110 and the inner hole of the roller base 100; a plunger 210 is integrally formed on the side of the adhesive layer 200 facing the working surface, and the plunger 210 is fixedly arranged in the radial hole 130 to improve the connection firmness between the adhesive layer 200 and the roller base 100 and prevent the adhesive layer 200 from falling off from the accommodating groove 110.

[0068] Preferably, Figure 1 and Figure 6 As shown, the radial hole 130 is a tapered hole, and the radial dimension of the radial hole 130 at one end close to the axis of the roller base 100 is greater than the radial dimension of the radial hole 130 at one end away from the axis of the roller base 100, that is, the radial dimension of the radial hole 130 gradually increases from the end away from the axis of the roller base 100 to the end close to the axis of the roller base 100, and the taper angle of the radial hole 130 is β.

[0069] In a specific embodiment, if Figure 1 and Figure 2As shown, a composite material roller includes a roller base 100 and a glue layer 200. A receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The glue layer 200 is received in the receiving groove 110, and the working surface of the glue layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0070] The rubber layer 200 is evenly distributed on the outer circumferential surface of the roller base 100, and the working surface area of ​​the rubber layer 200 is larger than the supporting contact surface area of ​​the roller base 100 in contact with the cloth; that is, the rubber or plastic material is evenly distributed on the outer circumferential surface of the roller, and on the outer circumferential surface of the roller, the proportion of the rubber or plastic material is higher than the proportion of the metal material, and the ratio is 2:1 to 4:1, that is, the working surface area of ​​the rubber layer 200 is 2 / 3 to 4 / 5 of the entire outer circumferential surface area of ​​the roller base 100.

[0071] In a specific embodiment, if Figure 1 and Figure 8 As shown, a composite material roller includes a roller base 100 and a glue layer 200. A receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The glue layer 200 is received in the receiving groove 110, and the working surface of the glue layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0072] In the circumferential direction of the roller base 100 , the adhesive layer 200 and the roller base 100 are alternately distributed, and in the axial direction of the roller base 100 , the adhesive layer 200 and the roller base 100 are alternately distributed.

[0073] In a specific embodiment, if Figure 1 As shown, a composite roller includes a roller base 100 and a rubber layer 200. A receiving groove 110 is formed on the outer circumferential surface of the roller base 100. The rubber layer 200 is formed in the receiving groove 110 by an injection molding process, and the working surface of the rubber layer 200 is coplanar with the outer circumferential surface of the roller base 100.

[0074] In other embodiments, the adhesive layer 200 may also be installed or formed in the receiving groove 110 using other known processes, as long as the adhesive layer 200 can be fixed in the receiving groove 110 and the working surface of the adhesive layer 200 is coplanar with the outer circumferential surface of the roller base 100 .

[0075] Examples, such as Fig.10 As shown, a rear tugboat structure comprises the composite roller mentioned above.

[0076] Embodiment, a sewing machine, the sewing machine comprises the above-mentioned rear tug wheel structure.

[0077] The working principle of the roller of this application is as follows:

[0078] In the present application, a receiving groove 110 is formed on the outer circumferential surface of a roller base 100 made of metal material, and a rubber layer 200 made of rubber or plastic material is injection molded in the receiving groove 110, and the working surface of the rubber layer 200 is made coplanar with the outer circumferential surface of the roller base 100, so that during the sewing process, the roller base 100 and the rubber layer 200 can contact the fabric at the same time. Through the supporting effect of the roller base 100, the wear of the rubber layer 200 can be effectively reduced, the generation of scratches can be reduced, and the service life of the rear tugboat structure can be extended.

[0079] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A composite material roller, characterized in that: include: A roller base (100), wherein an accommodating groove (110) is formed on the outer circumferential surface of the roller base (100); A glue layer (200), the glue layer (200) is accommodated in the accommodation groove (110), the working surface of the glue layer (200) is coplanar with the outer circumferential surface of the roller base (100), and in the circumferential direction of the roller base (100), the glue layer (200) and the roller base (100) are alternately distributed.

2. A composite material roller according to claim 1, characterized in that: There are a plurality of the accommodating grooves (110), and the plurality of the accommodating grooves (110) are distributed at equal intervals along the circumferential direction on the outer circumferential surface of the roller base (100).

3. A composite material roller according to claim 2, characterized in that: The accommodating groove (110) is a V-shaped groove.

4. A composite material roller according to claim 3, characterized in that: The lowest point of the upper surface of the V-shaped groove is located below the lowest point of the side surface.

5. The composite roller according to claim 2, characterized in that: The accommodation groove (110) is a strip groove, and the angle between the length direction of the strip groove and the circumferential direction of the roller base (100) is γ, 0°<γ≤90°.

6. The composite roller according to claim 2, characterized in that: The accommodating groove (110) is a tooth groove, and the tooth groove is a straight tooth groove, an oblique tooth groove or a herringbone tooth groove.

7. The composite roller according to claim 6, characterized in that: In the circumferential direction of the roller base (100), the rubber layers (200) in two adjacent tooth grooves are fixedly connected.

8. The composite roller according to claim 2, characterized in that: The accommodating groove (110) is wide at the top and narrow at the bottom.

9. The composite roller according to claim 1, characterized in that: The receiving groove (110) is an annular groove coaxially arranged with the roller base (100), a plurality of radial bosses (120) are integrally formed in the annular groove, the adhesive layer (200) is received in the receiving groove (110) and is located on the circumferential side of the radial boss (120), and the outer end surface of the radial boss (120) is coplanar with the outer circumferential surface of the roller base (100).

10. The composite material roller according to claim 9, characterized in that: The cross section of the radial boss (120) is circular or polygonal.

11. The composite roller according to claim 1, characterized in that: The roller base (100) is formed with a radial hole (130) communicating with the accommodating groove (110), and a plunger (210) is integrally formed on the side of the adhesive layer (200) facing the working surface, and the plunger (210) is fixedly arranged in the radial hole (130).

12. The composite roller according to claim 11, characterized in that: The radial hole (130) is a tapered hole, and the radial dimension of the radial hole (130) at one end close to the axis of the roller base (100) is greater than the radial dimension of the radial hole (130) at one end away from the axis of the roller base (100).

13. The composite roller according to claim 1, characterized in that: The working surface area of ​​the adhesive layer (200) is 2 / 3 to 4 / 5 of the outer circumferential surface area of ​​the roller base (100).

14. The composite roller according to claim 1, characterized in that: In the axial direction of the roller base (100), the adhesive layer (200) and the roller base (100) are alternately distributed.

15. The composite roller according to claim 1, characterized in that: The adhesive layer (200) is injection molded in the accommodating groove (110).

16. A rear tugboat structure, characterized in that: The rear tugboat structure comprises the composite roller according to any one of claims 1-15.

17. A sewing machine, characterized in that: The sewing machine includes the rear tug wheel structure according to claim 16.

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