Small connecting rod and embroidery machine

Abstract

The utility model relates to the field of embroidery machine parts, and discloses a small connecting rod which comprises a connecting rod body (1), a first hole (2) used for being connected with a driver and a second hole (3) used for being connected with a three-eye connecting rod are formed in the connecting rod body (1), a seam (4) is formed in the side wall of at least one of the first hole (2) and the second hole (3), and the seam (4) is communicated with the outside. The width change of the seam (4) can drive the aperture change of the connected hole. And a locking hole (8) is further included, and the locking hole (8) penetrates through the seam (4). The small connecting rod has the advantages of reliable and stable structure and the like.

Description

Technical Field

[0001] The utility model relates to the field of embroidery machine parts, in particular to a small connecting rod and an embroidery machine. Background Art

[0002] In the prior art, the needle bar cam and thread take-up lever drive cam mechanism in the embroidery machine head are arranged with an eccentric cam. For example, the applicant's prior Chinese patent application CN201410109821.9 discloses a computer embroidery machine needle bar cam mechanism with a balancing device. The cam structure is connected to a three-eye connecting rod via a shaft, and the three-eye connecting rod is driven by a small connecting rod to perform high-speed reciprocating motion. However, the traditional small connecting rod structure is a double-hole structure. When it is assembled with the shaft pin, it is generally locked and fixed with an axial fixing bolt. The rotating part is designed with a bushing or bearing to meet the rotation requirements. Due to limited space, this part is difficult to assemble, and the accuracy during high-speed transmission is difficult to control. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides a small connecting rod and an embroidery machine.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] The small connecting rod includes a connecting rod body, which is provided with hole 1 for connecting to the driver and hole 2 for connecting to the three-eye connecting rod. At least one side wall of hole 1 and hole 2 is provided with a slit, which is connected to the outside. Changes in the width of the slit will drive changes in the aperture of the connected hole.

[0006] Preferably, a locking hole is further included, and the locking hole passes through the slit.

[0007] Preferably, the connecting rod bodies on both sides of the slit are protrusions, the locking holes are opened on the protrusions, the opening of the slit extends to the outer side of the protrusion, the slit divides the protrusion into an upper part and a lower part, the locking hole passes through at least one of the upper part and the lower part, and the locking hole forms a blind hole or a through hole in the other part.

[0008] Preferably, the locking hole passes through the upper part and the lower part, and the locking hole is a smooth hole or a threaded hole.

[0009] Preferably, the locking hole passes through one of the upper part and the lower part, and forms a blind hole on the other part, and the blind hole part is a threaded hole.

[0010] Preferably, the side walls of hole one and hole two are both provided with slits.

[0011] Preferably, a slit is provided on the side wall of the second hole, and a bearing structure is integrated in the first hole.

[0012] Preferably, it also includes shaft one, which is installed in hole one. Groove one is provided on the outer annular surface of the part of shaft one installed in hole one, and groove two is provided on the inner wall of hole one. Groove one and groove two form a bearing structure for the channel of roller movement.

[0013] Preferably, both groove one and groove two are double groove structures, and the bearing structure formed is a double groove ball bearing structure.

[0014] The embroidery machine is equipped with the small connecting rod described above.

[0015] Compared with the existing technology, this solution has the following advantages: the designed small connecting rod has a stable and reliable connection without sticking, and has a long service life, which can meet the needs of continuous high-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of the small connecting rod.

[0017] Figure 2 This is the main view of the small connecting rod.

[0018] Figure 3 This is a schematic diagram of the connecting rod body.

[0019] Figure 4 It is a cross-sectional view of the small connecting rod.

[0020] Figure 5 This is a structural diagram of axis one.

[0021] Figure 6 It is a structural schematic diagram of the small connecting rod of Example 5.

[0022] The technical names of the figures are: 1-connecting rod body, 2-hole one, 3-hole two, 4-slit, 5-bump, 6-upper part, 7-lower part, 8-locking hole, 9-bearing structure, 10-shaft one, 12-groove one, 13-groove two, 14-roller. DETAILED DESCRIPTION

[0023] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] The small connecting rod includes a connecting rod body 1, which is provided with a first hole 2 for connecting to the driver and a second hole 3 for connecting to the three-hole connecting rod. At least one of the side walls of the first hole 2 and the second hole 3 is provided with a slit 4, which communicates with the outside. Variations in the width of the slit 4 cause variations in the diameter of the connected hole. The slit 4 is an open structure. Specifically, in this embodiment, the slit 4 is provided on the side wall of the second hole 3.

[0026] In order to adjust the hole diameter, the locking hole 8 is also provided, which passes through the slot 4. The significance of the penetration is that the bolt can act on the surfaces on both sides of the slot 4 to exert a force, thereby causing the two sides of the slot 4 to be pulled and shrink, thereby driving the inner diameter of the connected hole to change and clamping the shaft in the hole.

[0027] The connecting rod body 1 on either side of the slit 4 is formed into a protrusion 5, and a locking hole 8 is formed in the protrusion 5. The opening of the slit 4 extends to the outer side of the protrusion 5. The slit 4 divides the protrusion 5 into an upper portion 6 and a lower portion 7. The locking hole 8 passes through at least one of the upper portion 6 and the lower portion 7, and the locking hole 8 forms a blind hole or a through hole in the other portion. In this embodiment, the locking hole 8 passes through the upper portion 6 and the lower portion 7 to form a through hole. The locking hole 8 is used to insert a bolt for locking and fixing. The locking hole 8 can be a plain hole or a threaded hole as required.

[0028] Specifically, in this embodiment, a slit 4 is formed in the sidewall of hole 2 3 , and a bearing structure 9 is integrated within hole 1 2 . Also included is shaft 10 , which is mounted within hole 1 2 . A groove 12 is formed on the outer annular surface of the portion of shaft 10 that is mounted within hole 1 2 . A groove 13 is formed on the inner wall of hole 1 2 . Grooves 12 and 13 together form a channel in bearing structure 9 for the movement of roller 14 .

[0029] Compared with the existing technology, this solution has the following advantages: the designed small connecting rod has a stable and reliable connection without sticking, and has a long service life, which can meet the needs of continuous high-speed operation.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that the locking hole 8 passes through one of the upper part 6 and the lower part 7, and forms a blind hole on the other part, and the blind hole part is a threaded hole.

[0032] Example 3

[0033] The difference between this embodiment and embodiment 1 is that slits 4 are formed on the side walls of both hole 1 2 and hole 2 3 .

[0034] Example 4

[0035] The difference between this embodiment and embodiment 1 is that the groove 1 12 and the groove 2 13 are both double-groove structures, and the formed bearing structure 9 is a double-groove ball bearing structure 9 .

[0036] Example 5

[0037] The difference from the above embodiment is that one end of shaft 10 used for connecting with the driver is a stepped shaft structure, specifically, the end is shaft segment 1 101 and the part close to the main body of the small connecting rod is shaft segment 2 102, and the shaft segment 101 at the end is provided with an external thread, which is used to be threadedly connected with a locking nut, thereby fixing the driver and the small connecting rod.

[0038] Example 6

[0039] An embroidery machine is equipped with the small connecting rod of the above embodiment.

Claims

1. A small connecting rod, comprising a connecting rod body (1), the connecting rod body (1) being provided with a first hole (2) for connecting to a driver and a second hole (3) for connecting to a three-eye connecting rod, characterized in that: At least one side wall of hole 1 (2) and hole 2 (3) is provided with a slit (4), which is connected to the outside. Changes in the width of the slit (4) will drive changes in the aperture of the connected hole.

2. The small connecting rod according to claim 1, characterized in that: It also includes a locking hole (8), which passes through the slit (4).

3. The small connecting rod according to claim 2, characterized in that: The connecting rod body (1) on both sides of the slit (4) is a protrusion (5), the locking hole (8) is opened on the protrusion (5), the opening of the slit (4) extends to the outer side of the protrusion (5), the slit (4) divides the protrusion (5) into an upper part (6) and a lower part (7), the locking hole (8) passes through at least one of the upper part (6) and the lower part (7), and the locking hole (8) forms a blind hole or a through hole in the other part.

4. The small connecting rod according to claim 3, characterized in that: The locking hole (8) passes through the upper portion (6) and the lower portion (7), and the locking hole (8) is a light hole or a threaded hole.

5. The small connecting rod according to claim 3, characterized in that: The locking hole (8) passes through one of the upper part (6) and the lower part (7), and forms a blind hole on the other part, wherein the blind hole part is a threaded hole.

6. The small connecting rod according to any one of claims 1 to 5, characterized in that: The side walls of hole one (2) and hole two (3) are both provided with slits (4).

7. The small connecting rod according to any one of claims 1 to 5, characterized in that: A slit (4) is provided on the side wall of the second hole (3), and a bearing structure (9) is integrated in the first hole (2).

8. The small connecting rod according to claim 1, 2, 3, 4 or 5, characterized in that: It also includes shaft one (10), which is installed in hole one (2), and a groove one (12) is provided on the outer ring surface of the part of shaft one (10) installed in hole one (2), and a groove two (13) is provided on the inner wall of hole one (2), and groove one (12) and groove two (13) form a channel of the bearing structure (9) for the movement of the roller (14).

9. The small connecting rod according to claim 8, characterized in that: One end of the shaft 1 (10) used for connecting with the driver is a stepped shaft structure, and the shaft section 1 (101) at the end is provided with an external thread, and the external thread is used for threaded connection with the locking nut; the groove 1 (12) and the groove 2 (13) are both double-groove structures, and the bearing structure (9) formed is a double-groove ball bearing structure (9).

10. Embroidery machine, characterized by: Equipped with the small connecting rod described in any one of claims 1 to 9.

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