Oil-free rotating shuttle

Abstract

The utility model discloses an oil-free rotating shuttle which comprises a guide rail, a shuttle frame, a shuttle race, a shuttle plate and a shuttle skin, shuttle frame metal wear-resisting parts are arranged on the shuttle frame at the thread hooking end and the thread loosening end of the guide rail respectively, and guide rail end point protection parts consistent with the guide rail made of self-lubricating materials are arranged at the thread hooking end and the thread loosening end of the guide rail respectively. Each shuttle frame metal wear-resisting part is embedded in the groove of the corresponding guide rail end point protection part, the guide rail end point protection parts are used for preventing the corresponding shuttle frame metal wear-resisting parts from directly contacting with the guide rail grooves and galling the guide rail grooves, and the shuttle frame metal wear-resisting parts are used for preventing sewing threads from directly abrading the corresponding ends of the guide rails. The shuttle frame metal wear-resisting part can be completely separated from the guide rail groove through the guide rail end point protection part, so that the shuttle frame metal wear-resisting part is prevented from being in direct contact with the guide rail groove and galling the guide rail groove, and the shuttle frame metal wear-resisting part can prevent sewing threads from directly abrading the corresponding end part of the guide rail.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology, specifically relating to an oil-free rotary hook. Background Technology

[0002] The rotary shuttle is an important component of a sewing machine, mainly consisting of the shuttle bed, shuttle plate, shuttle skin, shuttle frame, and guide rails set on the shuttle frame. The shuttle bed is also called the outer shuttle, the shuttle plate is also called the moon ring, the shuttle skin is also called the thread guide plate, and the shuttle frame is also called the inner shuttle.

[0003] Patent CN221854978U discloses an oil-free rotary shuttle, including a shuttle frame, a guide rail, a shuttle bed, a shuttle skin, and a shuttle plate. The guide rail and the shuttle frame are fitted together, and the mating surfaces of the guide rail and the shuttle frame are provided with nested grooves and protrusions. Specifically, the shuttle frame has a groove I that corresponds to the protrusion I on the guide rail, and the shuttle frame has a protrusion II that corresponds to the groove II on the guide rail. The shuttle frame has a protrusion III, which is used to limit the two ends of the guide rail. The two ends of the guide rail abut against the protrusion III, and at least one of the abutting surfaces of the guide rail and the protrusion III has a groove IV or a protrusion IV. In this patent, the guide rail hook end and the guide rail unhooking end are located at both ends of the guide rail. To improve the wear resistance of the guide rail at both ends, metal ends are provided at the guide rail hook end and the guide rail unhooking end, that is, wear-resistant parts of metal structures are provided at both ends of the guide rail. However, since the wear-resistant parts of the metal structures are significantly different from the materials of the guide rail itself, in practical applications, the exposed wear-resistant parts of the metal structures at both ends of the guide rail are prone to scratching the guide rail grooves that are adapted to the guide rail and set on the shuttle, thereby limiting the service life of the shuttle. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the present invention provides an oil-free rotary shuttle, which can completely isolate the wear-resistant metal part of the shuttle frame from the guide rail groove through the guide rail end protection part, so as to prevent the wear-resistant metal part of the shuttle frame from directly contacting the guide rail groove and scratching the guide rail groove, and the wear-resistant metal part of the shuttle frame can prevent the sewing thread from directly abrading the corresponding end of the guide rail.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An oil-free rotary shuttle includes a guide rail, a shuttle frame, a shuttle bed, a shuttle plate, and a shuttle skin. The guide rail is attached and fixedly mounted on the shuttle frame. The shuttle bed is provided with a guide rail groove adapted to the guide rail. The guide rail is slidably mounted in the guide rail groove. The shuttle frame is provided with a shuttle frame metal wear-resistant part at the hook end and the unhooking end of the guide rail, respectively. The hook end and the unhooking end of the guide rail are provided with a guide rail end protection part of the same material as the self-lubricating guide rail. Each shuttle frame metal wear-resistant part is nested in the groove of the corresponding guide rail end protection part. The guide rail end protection part is used to prevent the corresponding shuttle frame metal wear-resistant part from directly contacting the guide rail groove and scratching the guide rail groove. The shuttle frame metal wear-resistant part is used to prevent the sewing thread from directly abrading the corresponding end of the guide rail.

[0007] Furthermore, the surface of the guide rail that contacts the stitch at the hook end is called the guide rail inclined surface. The guide rail inclined surface is provided with a guide rail reinforcing and wear-resistant part, which is used to prevent the stitch directly wears the hook end of the guide rail.

[0008] Furthermore, the two surfaces on the guide rail that are in contact with and opposite to the guide rail groove are called the guide rail running planes, and the surface on the guide rail that is in contact with the guide rail groove and located between the two guide rail running planes is called the guide rail arc surface. The guide rail end point protection part includes three guide rail end point protection plates. The outer surface of one of the guide rail end point protection plates is connected to the guide rail arc surface, and the outer surfaces of the other two guide rail end point protection plates are respectively connected to the corresponding guide rail running planes. The groove formed by the three guide rail end point protection plates and the corresponding ends of the guide rail is called the guide rail end point protection groove. The metal wear-resistant part of the shuttle frame is nested in the corresponding guide rail end point protection groove.

[0009] Furthermore, the guide rail has multiple trapezoidal reinforcing protrusions with trapezoidal cross-sections and multiple reinforcing protrusions at the surface that contacts the shuttle frame. The shuttle frame has multiple reinforcing grooves with trapezoidal structures equal to the number of the guide rail reinforcing protrusions and multiple reinforcing grooves at the shuttle frame supports equal to the number of the guide rail reinforcing protrusions. Each guide rail reinforcing protrusion is adapted to and nested with the corresponding shuttle frame reinforcing groove, and each guide rail reinforcing protrusion is adapted to and nested with the corresponding shuttle frame reinforcing groove.

[0010] Furthermore, some of the guide rail support reinforcement protrusions are cylindrical.

[0011] Furthermore, the surface on the shuttle frame used for mounting the shuttle case is called the shuttle case mounting surface. Each of the shuttle frame trapezoidal structure reinforcement grooves is located at the shuttle case mounting surface and forms a trapezoidal notch. One of the surfaces of each guide rail trapezoidal structure reinforcement protrusion is flush with the shuttle case mounting surface.

[0012] Furthermore, the guide rail, the guide rail end protection part, the guide rail trapezoidal structure reinforcement protrusion, and the guide rail fulcrum reinforcement protrusion are integrally formed by injection molding.

[0013] Furthermore, the plurality of the guide rail trapezoidal structure reinforcing protrusions are located between two of the guide rail fulcrum reinforcing protrusions.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The oil-free rotary shuttle of this utility model includes a guide rail, a shuttle frame, a shuttle bed, a shuttle plate, and a shuttle skin. The guide rail is attached and fixedly mounted on the shuttle frame. The shuttle bed is provided with a guide rail groove adapted to the guide rail. The guide rail is slidably mounted in the guide rail groove. The shuttle frame is provided with a shuttle frame metal wear-resistant part at the hook end and the unhooking end of the guide rail, respectively. The hook end and the unhooking end of the guide rail are provided with a guide rail end protection part that is the same as the guide rail material of the self-lubricating material. Each shuttle frame metal wear-resistant part is nested in the groove of the corresponding guide rail end protection part. The guide rail end protection part is used to prevent the corresponding shuttle frame metal wear-resistant part from directly contacting the guide rail groove and scratching the guide rail groove. The shuttle frame metal wear-resistant part is used to prevent the sewing thread from directly abrading the corresponding end of the guide rail. Because each shuttle frame's wear-resistant metal part is nested within the groove of the corresponding guide rail end protection part, the guide rail end protection part completely isolates the shuttle frame's wear-resistant metal part from the guide rail groove, preventing direct contact between the shuttle frame's wear-resistant metal part and the guide rail groove from scratching the guide rail groove, thus ensuring the service life of the shuttle machine. In addition, since the guide rail is made of a self-lubricating material, and the material of the guide rail end protection part is the same as that of the guide rail, the self-lubricating material guide rail end protection part will experience a certain degree of wear during use, and the shuttle frame's wear-resistant metal part nested in the groove of the guide rail end protection part will gradually be exposed. The exposed shuttle frame's wear-resistant metal part can prevent the stitching from directly abrading the corresponding end of the guide rail.

[0016] In this invention, the surface of the guide rail that contacts the sewing thread at the hook end is called the guide rail inclined surface, and a guide rail reinforcing and wear-resistant part is provided on the guide rail inclined surface. This reinforcing and wear-resistant part prevents the sewing thread from directly abrading the hook end of the guide rail when the guide rail circles the top thread to the other side of the shuttle frame, thus ensuring the wear resistance and reliability of the guide rail in the rotary shuttle. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the oil-free rotary hook in this utility model;

[0018] Figure 2 for Figure 1 Exploded view;

[0019] Figure 3 for Figure 1 Enlarged schematic diagram of the center guide rail;

[0020] Figure 4 for Figure 1 A three-dimensional structural diagram of the central shuttle frame from another direction;

[0021] Figure 5 for Figure 1 A three-dimensional structural diagram of the central shuttle frame from another direction;

[0022] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle circle;

[0023] Figure 7 for Figure 5 Enlarged structural diagram at point B in the middle circle;

[0024] Figure 8 for Figure 5 A schematic diagram of the three-dimensional structure from another direction.

[0025] Explanation of reference numerals in the figure: 1. Guide rail; 101. Guide rail end point protection part; 10101. Guide rail end point protection plate; 10102. Guide rail end point protection groove; 102. Guide rail trapezoidal structure reinforcing protrusion; 103. Guide rail support point reinforcing protrusion; 104. Guide rail arc surface; 105. Guide rail running plane; 106. Guide rail reinforced wear-resistant part; 2. Shuttle frame; 201. Shuttle frame metal wear-resistant part; 202. Shuttle frame trapezoidal structure reinforcing groove; 203. Shuttle frame support point reinforcing groove; 204. Shuttle shell mounting surface; 3. Shuttle bed; 4. Shuttle plate; 5. Shuttle skin. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0027] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] like Figure 1 and Figure 2 As shown, an oil-free rotary shuttle includes a guide rail 1, a shuttle frame 2, a shuttle bed 3, a shuttle plate 4, and a shuttle skin 5. The guide rail 1 is attached and fixedly mounted on the shuttle frame 2. The shuttle bed 3 is provided with a guide rail groove adapted to the guide rail 1, and the guide rail 1 is slidably mounted in the guide rail groove. Figures 4-8 As shown, the shuttle frame 2 is provided with wear-resistant metal parts 201 at the hook end and the unhooking end of the guide rail 1, respectively. Figure 3 As shown, the guide rail 1 has guide rail end protection parts 101 at the hook end and the unhooked end, respectively, which are made of the same material as the self-lubricating guide rail 1. Figures 5-8As shown, each shuttle frame metal wear-resistant part 201 is nested in the groove of the corresponding guide rail end protection part 101. The guide rail end protection part 101 is used to prevent the corresponding shuttle frame metal wear-resistant part 201 from directly contacting the guide rail groove and scratching the guide rail groove. The shuttle frame metal wear-resistant part 201 is used to prevent the sewing thread from directly abrading the corresponding end of the guide rail 1.

[0029] Since each shuttle frame metal wear-resistant part 201 is nested in the groove of the corresponding guide rail end protection part 101, the guide rail end protection part 101 can completely isolate the shuttle frame metal wear-resistant part 201 from the guide rail groove, preventing the shuttle frame metal wear-resistant part 201 from directly contacting the guide rail groove and scratching the guide rail groove, thereby ensuring the service life of the shuttle bed 3; in addition, since the guide rail 1 is made of self-lubricating material, and the material of the guide rail end protection part 101 is the same as that of the guide rail 1, the self-lubricating material guide rail end protection part 101 will wear to a certain extent during use, and the shuttle frame metal wear-resistant part 201 nested in the groove of the guide rail end protection part 101 will gradually be exposed. The exposed shuttle frame metal wear-resistant part 201 can prevent the stitching from directly abrading the corresponding end of the guide rail 1.

[0030] The thickness of guide rail 1 is controlled between 1.9-3.1mm.

[0031] In one embodiment,

[0032] The surface of the guide rail 1 that contacts the stitching at the hook end is called the guide rail inclined surface. A guide rail reinforcing and wear-resistant part 106 is provided on the guide rail inclined surface. (See...) Figure 5 and Figure 7 The guide rail reinforced wear-resistant part 106 is used to prevent the stitching from directly abrading the hook end of the guide rail 1.

[0033] By setting the wear-resistant part 106 of the guide rail, it is possible to prevent the seam thread from directly wearing off the hook end of the guide rail 1 when the guide rail 1 pulls the top thread around to the other side of the shuttle frame 2, thereby ensuring the wear resistance and reliability of the guide rail 1 in the rotary shuttle.

[0034] In one embodiment, such as Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the two surfaces on the guide rail 1 that are in contact with and opposite to the guide rail groove are called the guide rail running plane 105. The surface on the guide rail 1 that is in contact with the guide rail groove and located between the two guide rail running planes 105 is called the guide rail arc surface 104. The guide rail end protection part 101 includes three guide rail end protection plates 10101. The outer surface of one guide rail end protection plate 10101 is connected to the guide rail arc surface 104. The outer surfaces of the other two guide rail end protection plates 10101 are respectively connected to the corresponding guide rail running planes 105. The groove formed by the three guide rail end protection plates 10101 and the corresponding ends of the guide rail 1 is called the guide rail end protection groove 10102. The shuttle frame metal wear-resistant part 201 is nested in the corresponding guide rail end protection groove 10102.

[0035] The thickness of each guide rail end protection plate 10101 is controlled between 0.1-2mm, and the thickness of the guide rail end protection plate 10101 is less than the thickness of the guide rail 1.

[0036] In one embodiment, such as Figure 3 , Figure 5 and Figure 8 As shown, the surface of the guide rail 1 that is in contact with the shuttle frame 2 is provided with multiple trapezoidal reinforcing protrusions 102 and multiple reinforcing protrusions 103, such as... Figure 4 As shown, the shuttle frame 2 is provided with multiple shuttle frame trapezoidal structure reinforcing grooves 202, the number of which is equal to the number of guide rail trapezoidal structure reinforcing protrusions 102, and multiple shuttle frame support point reinforcing grooves 203, the number of which is equal to the number of guide rail support point reinforcing protrusions 103. Figures 5-8 As shown, each guide rail trapezoidal structure reinforcing protrusion 102 is adapted to and nested with the corresponding shuttle frame trapezoidal structure reinforcing groove 202, and each guide rail support point reinforcing protrusion 103 is adapted to and nested with the corresponding shuttle frame support point reinforcing groove 203.

[0037] In this way, the guide rail 1 can be firmly set on the shuttle frame 2 by nesting the multiple guide rail trapezoidal structure reinforcing protrusions 102 with the corresponding shuttle frame trapezoidal structure reinforcing grooves 202, and by nesting the multiple guide rail support point reinforcing protrusions 103 with the corresponding shuttle frame support point reinforcing grooves 203.

[0038] Among them, some of the guide rail support reinforcement protrusions 103 are cylindrical, see Figure 3 .

[0039] Among them, such as Figure 4 As shown, the surface on the shuttle frame 2 used for mounting the shuttle case is called the shuttle case mounting surface 204. Each shuttle frame trapezoidal reinforcing groove 202 is located on the shuttle case mounting surface 204 and forms a trapezoidal notch, as shown below. Figure 8 As shown, one surface of each guide rail trapezoidal reinforcement protrusion 102 is flush with the shuttle housing mounting surface 204.

[0040] The guide rail 1, the guide rail end protection part 101, the guide rail trapezoidal structure reinforcing protrusion 102, and the guide rail support point reinforcing protrusion 103 are integrally formed by injection molding. In actual processing, due to factors such as processing precision, mold, and injection molding process, the guide rail end protection part 101 can either completely enclose the corresponding shuttle frame metal wear-resistant part 201 or partially expose the corresponding shuttle frame metal wear-resistant part 201.

[0041] Among them, such as Figure 3 As shown, multiple guide rail trapezoidal reinforcement protrusions 102 are located between two guide rail fulcrum reinforcement protrusions 103.

[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An oil-free rotary shuttle, comprising a guide rail (1), a shuttle frame (2), a shuttle bed (3), a shuttle plate (4), and a shuttle skin (5), wherein the guide rail (1) is fitted and fixedly disposed on the shuttle frame (2), and the shuttle bed (3) is provided with a guide rail groove adapted to the guide rail (1), and the guide rail (1) is slidably disposed within the guide rail groove, characterized in that: The shuttle frame (2) is provided with a shuttle frame metal wear-resistant part (201) at the hook end and the unhooking end of the guide rail (1). The hook end and the unhooking end of the guide rail (1) are respectively provided with a guide rail end protection part (101) of the same material as the self-lubricating guide rail (1). Each shuttle frame metal wear-resistant part (201) is nested in the groove of the corresponding guide rail end protection part (101). The guide rail end protection part (101) is used to prevent the corresponding shuttle frame metal wear-resistant part (201) from directly contacting the guide rail groove and scratching the guide rail groove. The shuttle frame metal wear-resistant part (201) is used to prevent the sewing thread from directly abrading the corresponding end of the guide rail (1).

2. The oil-free rotary hook according to claim 1, characterized in that: The surface of the guide rail (1) that contacts the sewing thread at the hook end is called the guide rail inclined surface. A guide rail reinforced wear-resistant part (106) is provided on the guide rail inclined surface. The guide rail reinforced wear-resistant part (106) is used to prevent the sewing thread from directly abrading the hook end of the guide rail (1).

3. The oil-free rotary hook according to claim 1, characterized in that: The two surfaces on the guide rail (1) that are in contact with the guide rail groove and are arranged opposite to each other are called the guide rail running plane (105). The surface on the guide rail (1) that is in contact with the guide rail groove and is located between the two guide rail running planes (105) is called the guide rail arc surface (104). The guide rail end protection part (101) includes three guide rail end protection plates (10101). The outer surface of one of the guide rail end protection plates (10101) is connected to the guide rail arc surface (104). The outer surfaces of the other two guide rail end protection plates (10101) are respectively connected to the corresponding guide rail running planes (105). The groove formed by the three guide rail end protection plates (10101) and the corresponding ends of the guide rail (1) is called the guide rail end protection groove (10102). The shuttle frame metal wear-resistant part (201) is nested in the corresponding guide rail end protection groove (10102).

4. The oil-free rotary hook according to claim 1, characterized in that: The guide rail (1) has multiple trapezoidal reinforcing protrusions (102) and multiple reinforcing protrusions (103) on the surface that is in contact with the shuttle frame (2). The shuttle frame (2) has multiple reinforcing grooves (202) of the shuttle frame, which are equal in number to the number of the guide rail trapezoidal reinforcing protrusions (102) and multiple reinforcing grooves (203) of the shuttle frame support, which are equal in number to the number of the guide rail reinforcing protrusions (103). Each guide rail trapezoidal reinforcing protrusion (102) is adapted to and nested with the corresponding shuttle frame trapezoidal reinforcing groove (202). Each guide rail support reinforcing protrusion (103) is adapted to and nested with the corresponding shuttle frame support reinforcing groove (203).

5. An oil-free rotary hook according to claim 4, characterized in that: The guide rail support reinforcement protrusion (103) is cylindrical.

6. An oil-free rotary hook according to claim 4, characterized in that: The surface on the shuttle frame (2) used for mounting the shuttle shell is called the shuttle shell mounting surface (204). Each of the shuttle frame trapezoidal structure reinforcing grooves (202) is located at the shuttle shell mounting surface (204) and forms a trapezoidal notch. One of the surfaces of each guide rail trapezoidal structure reinforcing protrusion (102) is flush with the shuttle shell mounting surface (204).

7. An oil-free rotary hook according to claim 4, characterized in that: The guide rail (1), the guide rail end protection part (101), the guide rail trapezoidal structure reinforcing protrusion (102), and the guide rail fulcrum reinforcing protrusion (103) are integrally formed by injection molding.

8. An oil-free rotary hook according to claim 4, characterized in that: The multiple guide rail trapezoidal structure reinforcing protrusions (102) are located between two of the guide rail fulcrum reinforcing protrusions (103).

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