Three-eye connecting rod for high-speed machine head of embroidery machine

Abstract

The utility model relates to the field of embroidery machine parts, and discloses a three-hole connecting rod for a high-speed machine head of an embroidery machine, the three-hole connecting rod comprises a rod body (10), the rod body (10) is provided with a first hole (1), a second hole (2) and a third hole (3), the second hole (2) is located between the first hole (1) and the third hole (3), and the second hole (2) is provided with a first shaft (6) or provided with a first locking groove (4) for locking the first shaft (6); or / and the hole III (3) is provided with a shaft II (7) or is provided with a locking groove II (5) for locking the shaft II (7). The three-eye connecting rod has the advantages of stable and reliable transmission, no clamping stagnation, long service life and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of embroidery machine parts, in particular to a three-eye connecting rod for a high-speed embroidery machine head. BACKGROUND

[0002] In the prior art, the needle bar cam and the thread lifting rod driving cam mechanism in the embroidery machine head are eccentric cams, such as the computer embroidery machine needle bar cam mechanism with a balancing device disclosed in the prior Chinese patent application CN201410109821.9. The cam structure is connected to the three-eye connecting rod through a shaft, and the three-eye connecting rod drives the driver to perform high-speed reciprocating motion through a small connecting rod, which is commonly known as a four-piece assembly. For example, Chinese patent 202321860069.2 discloses the above technical solution, but this technical solution has the following disadvantages. Since it performs a swinging motion, a section of the connecting shaft needs to be able to rotate relative to the other end, which is fixed. The existing solution integrally designs the shaft and the bearing and then fits them on the three-eye connecting rod, which has the following disadvantages: complex assembly, large error, and the other end of the shaft is locked by a circlip or other structure, which is prone to failure and shortens the service life of the entire mechanism. SUMMARY

[0003] The present application provides a three-eye connecting rod for a high-speed embroidery machine head to overcome the shortcomings of the prior art.

[0004] To solve the above technical problems, the present application provides the following technical solutions:

[0005] The three-eye connecting rod for a high-speed embroidery machine head comprises a rod body, a hole one, a hole two, and a hole three are arranged on the rod body, the hole three is located between the hole one and the hole three, the hole two is provided with a locking groove one or a shaft one is arranged on the hole two; or / and the hole three is provided with a locking groove two or a shaft two is arranged on the hole three.

[0006] As a preferred, the locking groove one and the hole two form a notch structure, the locking groove one is communicated with the hole two, and the locking groove one is deformed under stress to change the inner diameter of the hole two.

[0007] As a preferred, the locking groove one is arranged on the side wall of the rod body and communicated with the hole two, and the locking groove one penetrates the end faces of both ends of the hole two.

[0008] As a preferred, the rod body comprises a fixed boss one, the locking groove one is arranged on the side face of the fixed boss one, a fixed hole one is arranged on the fixed boss one and penetrates the locking groove one.

[0009] As a preferred, the fixed hole one penetrates the upper end face and the lower end face of the fixed boss one.

[0010] As a preferred, an annular face on the outer side of the shaft one is provided with a groove one, an inner wall of the hole two is provided with a groove two, and a roller and a retainer are arranged between the groove one and the groove two.

[0011] As preferred, the locking groove two and the hole three form a notch structure, the locking groove two is communicated with the hole three, and the locking groove two is deformed to change the inner diameter of the hole three.

[0012] As preferred, the rod body comprises a fixed boss two, the locking groove two is arranged on the side surface of the fixed boss two, and the fixed boss two is provided with a fixed hole two penetrating through the locking groove two.

[0013] As preferred, the fixed hole two penetrates through the upper end surface and the lower end surface of the fixed boss two.

[0014] As preferred, the outer annular surface of the shaft two is provided with a groove three, the inner wall of the hole three is provided with a groove four, and the groove three and the groove four are provided with a roller and a retainer.

[0015] Compared with the prior art, the three-eye connecting rod has the following advantages: the three-eye connecting rod can meet different requirements through the locking shaft structure and the integrated bearing structure, the fixed shaft is locked reliably and is not easy to deform, the integrated bearing structure has no assembly error and has higher precision, the three outer walls can be thickened, and the overall strength is higher. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of a three-eye connecting rod.

[0017] Figure 2 It is a structural schematic view of a three-eye connecting rod.

[0018] Figure 3 It is a structural schematic view of a three-eye connecting rod.

[0019] Figure 4 It is a structural schematic view of a three-eye connecting rod.

[0020] Figure 5 It is a structural schematic view of a three-eye connecting rod. Figure 1 It is a structural schematic view of a three-eye connecting rod.

[0021] Figure 6 It is a structural schematic view of a three-eye connecting rod. Figure 1 It is a structural schematic view of a three-eye connecting rod.

[0022] Figure 7 Figure 1 It is a structural schematic view of a three-eye connecting rod.

[0023] Figure 8 It is a structural schematic view of a three-eye connecting rod. Figure 1 It is a structural schematic view of a three-eye connecting rod.

[0024] The technical names of the figures are: 1-hole one, 2-hole two, 3-hole three, 4-locking groove one, 5-locking groove two, 6-shaft one, 7-shaft two, 8-fixing boss one, 9-fixing boss two, 10-rod body, 11-fixing hole one, 12-fixing hole two, 13-roller, 14-retaining frame, 15-groove one, 16-groove two, 17-groove three, 18-groove four. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] A three-eye connecting rod for a high-speed head of an embroidery machine includes a rod body 10, on which are provided a hole 1, a hole 2, and a hole 3. The hole 3 and the hole 2 are located between the holes 1 and 3. The hole 2 is mounted with a shaft 6 or a locking groove 4 for locking the shaft 6; and / or the hole 3 is mounted with a shaft 7 or a locking groove 5 for locking the shaft 7. The axes of the holes 1, 2, and 3 are parallel to each other. Hole 1, located at the lower end, connects to the body of the high-speed machine head. Rod 10 can swing around hole 1. Hole 2, located in the middle, connects to a cam mechanism. This connection is achieved through shaft 1 (6). This solution provides two methods for connecting shaft 1 (6) to hole 2 (2). One is a split-type method, in which shaft 1 (6) is inserted into hole 2 (2) and then locked and secured to hole 2 (2) and shaft 1 (6) via a locking groove. The other method involves first axially securing shaft 1 (6) to hole 2 (2), then installing shaft 1 (6) within hole 2 (2), specifically connecting them via a bearing structure. Similarly, the connection between shaft 2 (7) and hole 3 (3) is similar to the connection between shaft 1 (6) and hole 2 (2). The following sections describe each method separately.

[0028] In this embodiment, shaft 1 (6) and rod 10 are separate components; hole 2 (2) defines a locking groove structure to secure shaft 1 (6). Specifically, locking groove 1 (4) and hole 2 (2) form a notch structure, connecting locking groove 1 (4) and hole 2 (2). Deformation of locking groove 1 (4) under force can cause the inner diameter of hole 2 (2) to change. Specifically, the locking groove extends outward from the inner wall of hole 2 (2). When the upper and lower portions of the locking groove are tightened under force, rod 10 at these portions deforms toward the center of the locking groove, thereby reducing the inner diameter of hole 2 and clamping shaft 1 (6) within hole 2 (2).

[0029] Specifically, the locking groove 1 4 is opened on the side wall of the rod body 10 and communicates with the hole 2 2. The locking groove 1 4 passes through the end faces at both ends of the hole 2. The end faces at both ends are the planes where the openings at the axial ends of the hole 2 are located.

[0030] To facilitate securing, the rod body 10 includes a fixing boss 8, a locking groove 4 defined on the side of the fixing boss 8, and a fixing hole 11 extending through the locking groove 4. The fixing boss 8 is located on one side of the hole 2, and the fixing hole 11 is used to receive a locking screw or bolt. The locking screw or bolt draws the fixing boss 8 portions on either side of the locking groove 4 closer together, thereby narrowing the locking groove 4 and, consequently, the inner diameter of the hole 2, thereby tightening the shaft 6 mounted within the hole 2. The fixing hole 11 can be a threaded hole or a blind hole. The fixing holes 11 are located on either side of the locking hole 1. The fixing hole 11 portion on one side is necessarily a through hole, while the fixing hole 11 portion on the other side is a blind hole or a through hole. If the portion is a blind hole, the fixing hole 11 is preferably a threaded hole, with at least the blind hole portion being threaded, allowing a screw to be inserted from the through hole portion into the blind hole portion for securing.

[0031] Example 2

[0032] The difference between this embodiment and embodiment 1 is that the fixing hole 11 passes through and is fixed on the upper end surface and the lower end surface of the boss 1, that is, the fixing hole 11 is a through hole structure that passes through a part of the boss on both sides of the locking groove 1 4, and the fixing hole 11 is a threaded hole or a smooth hole.

[0033] Example 3

[0034] This embodiment differs from Example 1 in that the locking groove 4 is replaced by an integrated structure of shaft 1 6 and hole 2 2 . Groove 15 is provided on the outer annular surface of shaft 1 6 , and groove 2 16 is provided on the inner wall of hole 2 2 . Roller 13 and retainer 14 are disposed between groove 15 and groove 2 16 . Groove 15 and groove 2 16 form the complete raceway for bearing roller 13 , and together with roller 13, retainer 14, and other components required for the bearing, form a complete bearing structure.

[0035] Example 4

[0036] This embodiment further defines the bearing structure based on the embodiment 3. The groove 1 15 and the groove 2 16 are both double groove structures. The bearing structure formed by the shaft 1 6 and the hole 2 2 and its inner wall is a double groove ball bearing structure.

[0037] Example 5

[0038] This embodiment further defines the structure of hole 3, which can be used in conjunction with the structure of hole 2 in any of the above embodiments. The locking groove 2 and hole 3 form a notch, connecting them. Deformation of the locking groove 5 can cause the inner diameter of hole 3 to change. This achieves the same function as the structural connection between hole 2 and locking groove 1.

[0039] The locking groove 25 is opened on the side wall of the rod body 10 and is connected to the hole 3 3. The locking groove passes through the end faces of both ends of the hole 3. The rod body 10 includes a fixing boss 2 9. The locking groove 25 is opened on the side of the fixing boss 2 9. The fixing boss 2 9 is provided with a fixing hole 2 12, and the fixing hole 2 12 passes through the locking groove 2 5.

[0040] Example 6

[0041] The second fixing hole 12 is further defined based on the fifth embodiment. The second fixing hole 12 passes through the upper and lower end surfaces of the second fixing boss 9. The structure design of the second fixing hole 12 is similar to that of the first locking groove 4, the second hole 2, and the first fixing hole 11.

[0042] Example 7

[0043] This embodiment further defines the structure of hole 3, which can be used in conjunction with the structure of hole 2 in any of embodiments 1-4. Groove 3 17 is provided on the outer annular surface of shaft 2 7, and groove 4 18 is provided on the inner wall of hole 3. Rollers 13 and retainer 14 are disposed between grooves 3 17 and 4 18. Specifically, this embodiment discloses a method for integrally connecting shaft 2 7 and hole 3 through a designed bearing structure. This structure is similar to the connection method between shaft 1 6 and hole 2 in embodiments 3 and 4.

[0044] Example 8

[0045] A double-groove ball bearing is integrated in hole 1, and the outer ring raceway of the double-groove ball bearing is a groove opened on the inner wall of hole 1. This structure is applicable to the three-eye connecting rod structure of all the above embodiments.

Claims

1. A three-eye connecting rod for a high-speed head of an embroidery machine, comprising a rod body (10), wherein the rod body (10) is provided with a hole 1 (1), a hole 2 (2) and a hole 3 (3), wherein the hole 2 (2) is located between the hole 1 (1) and the hole 3 (3), and wherein: The second hole (2) is provided with a shaft (6); the second hole (7) is provided with a locking groove (5) for locking the second shaft (7); the outer annular surface of the first shaft (6) is provided with a groove (15), the inner wall of the second hole (2) is provided with a groove (16), and a roller (13) and a retaining frame (14) are provided between the groove (15) and the groove (16).

2. The three-eye connecting rod for the high-speed head of an embroidery machine according to claim 1, characterized in that: The locking groove 2 (5) and the hole 3 (3) form a notch structure, the locking groove 2 (5) is connected to the hole 3 (3), and the deformation of the locking groove 2 (5) can drive the inner diameter of the hole 3 (3) to change.

3. The three-eye connecting rod for the high-speed head of an embroidery machine according to claim 2, characterized in that: The rod body (10) includes a second fixing boss (9), a second locking groove (5) is provided on the side of the second fixing boss (9), a second fixing hole (12) is provided on the second fixing boss (9), and the second fixing hole (12) passes through the second locking groove (5).

4. The three-eye connecting rod for the high-speed head of an embroidery machine according to claim 1, characterized in that: The outer annular surface of shaft two (7) is provided with groove three (17), the inner wall of hole three (3) is provided with groove four (18), and a roller (13) and a retaining frame (14) are provided between groove three (17) and groove four (18).

5. The three-eye connecting rod for the high-speed head of an embroidery machine according to claim 1, characterized in that: A double groove ball bearing is integrated in the hole one (1), and the outer ring raceway of the double groove ball bearing is a groove opened on the inner wall of the hole one (1).

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