A noise-reducing embroidery machine presser foot driving device and embroidery machine

Abstract

The application discloses a noise-reducing presser foot driving device of an embroidery machine and the embroidery machine. The presser foot driving device comprises a first pin shaft, a second pin shaft, a two-hole connecting rod, a yoke connecting rod, a yoke connecting rod pin shaft and a small connecting rod. The eyelet at the first end of the two-hole connecting rod is connected with the first pin shaft, and the eyelet at the second end of the two-hole connecting rod is connected with the second pin shaft. The second pin shaft penetrates through the free end of a cam connecting rod and is connected with a first bearing. The first end of the yoke connecting rod is provided with a yoke, the first bearing is arranged in the yoke, the middle part of the yoke connecting rod is connected with the yoke connecting rod pin shaft, the second end of the yoke connecting rod is connected with the first end of the small connecting rod, and the second end of the small connecting rod is connected with a presser foot driver. The presser foot driving device can significantly reduce the running noise and has the effect of reducing the abrasion at the transmission nodes.

Description

TECHNICAL FIELD

[0001] The present application relates to the embroidery machine technical field, especially to the embroidery machine presser foot driving device. BACKGROUND

[0002] The prior art discloses an embroidery machine presser foot driving device, which comprises a main shaft rotatably connected to a machine head shell, a presser foot driver driven by the main shaft, a presser foot cam assembly connected to the main shaft, the presser foot cam assembly comprising a presser foot cam, a first three-eye connecting rod, a second three-eye connecting rod, a first small connecting rod and a second small connecting rod, the presser foot cam assembly being connected to the first three-eye connecting rod, the first three-eye connecting rod, the first small connecting rod, the second three-eye connecting rod and the second small connecting rod being sequentially connected in transmission, and the second small connecting rod being rotatably connected to the presser foot driver.

[0003] For high-speed embroidery machines, the speed of the main shaft is getting faster, the various components of the embroidery machine presser foot driving device are hard connected, the noise is large during operation, the wear at the transmission nodes is large, regular maintenance is required, and the service life is affected. SUMMARY

[0004] In view of the defects of the prior art, the technical problem to be solved by the present application is to provide an embroidery machine presser foot driving device with reduced noise and an embroidery machine.

[0005] To solve the above technical problems, the present application adopts the following technical solutions:

[0006] On one hand, a noise-reducing presser foot drive device for an embroidery machine is provided, including a machine head housing, a main shaft that passes laterally through the machine head housing, a guide shaft that is vertically installed on the machine head housing, and a presser foot driver that is slidably installed on the guide shaft and driven by the main shaft. The main shaft is connected to a presser foot cam assembly, which includes a presser foot cam with a cam link. The presser foot drive device also includes a first pin, a second pin, a two-eye connecting rod, a shift fork connecting rod, a shift fork connecting rod pin, and a small connecting rod. The hole at the first end of the two-eye connecting rod is connected to the first pin, and the hole at the second end of the two-eye connecting rod is connected to the second pin. The second pin passes through the free end of the cam link and is connected to a first bearing. The first end of the shift fork connecting rod is provided with a shift fork, and the first bearing is located inside the shift fork. The middle part of the shift fork connecting rod is connected to the shift fork connecting rod pin. The second end of the shift fork connecting rod is connected to the first end of the small connecting rod, and the second end of the small connecting rod is connected to the presser foot driver.

[0007] Preferably, the presser foot drive device further includes a presser foot drive support assembly, which includes a fixed sleeve and a bearing assembly installed in the fixed sleeve, and the shift fork connecting rod pin is supported by the bearing assembly.

[0008] Preferably, the bearing assembly includes a second bearing, a third bearing, and a spacer separating the second bearing and the third bearing.

[0009] Preferably, the shift fork connecting rod pin is further connected to a first screw and a first washer. The first screw passes through the first washer and is threadedly connected to the end of the shift fork connecting rod pin, so that the first washer fits against the end face of the shift fork connecting rod pin.

[0010] Preferably, a side plate is installed on the left side of the head housing, and the presser foot drive support assembly is installed on the side plate; and / or, a bushing is provided on the inner side of the shift fork.

[0011] Preferably, the second pin is also connected to a second screw and a second washer. The second screw passes through the second washer and is threaded to the end of the second pin, so that the second washer fits against the end face of the second pin.

[0012] Preferably, the first pin includes a pin body and a rotating sleeve connected to the pin body. A fourth bearing is installed in the holes at both ends of the two-eye connecting rod. The rotating sleeve is rotatably supported by the fourth bearing in the hole at the first end of the two-eye connecting rod, and the second pin is rotatably supported by the fourth bearing in the hole at the second end of the two-eye connecting rod.

[0013] Preferably, a fifth bearing is installed at the first end of the small connecting rod, and a third pin is connected to the fifth bearing. The third pin is connected to the first end of the shift fork connecting rod.

[0014] Preferably, the first bearing is a double-row bearing; and / or, one of the second and third bearings is a double-row bearing.

[0015] The present invention also provides an embroidery machine, including the aforementioned embroidery machine presser foot drive device.

[0016] The technical solution adopted in this invention has the following beneficial effects:

[0017] 1. The shift fork connecting rod connects the two-eye connecting rod and the small connecting rod, and the two-eye connecting rod is also connected to the presser foot cam assembly. Therefore, the shift fork connecting rod is located in the middle of the entire presser foot drive device transmission chain of the embroidery machine, and has the greatest effect on reducing noise. On the one hand, the hole at the second end of the two-eye connecting rod is connected to the second pin, which passes through the free end of the cam connecting rod and connects to the first bearing. Since the first bearing and the shift fork are in a rolling connection, friction is reduced, thus reducing noise. On the other hand, the shift fork transmission structure itself has a low coefficient of friction, less wear, and low noise. At the same time, the first bearing can move relatively within the shift fork, which is a flexible connection, and compared with a rigid connection, it can reduce noise. Therefore, the presser foot drive device of the present invention can significantly reduce operating noise. Compared with the presser foot drive device in the prior art, it can reduce noise by 5-8 dB.

[0018] In addition, since the first bearing and the shift fork are connected by a rolling connection, and the first bearing can move relative to the shift fork, it is relatively rigidly connected, which can reduce wear at the transmission node, increase service life, and reduce maintenance costs.

[0019] 2. By using the rolling support of the bearing assembly to support the fork connecting rod pin, the operating noise at the fork connecting rod pin is reduced, wear is reduced, maintenance frequency is decreased, service life is increased, and maintenance costs are reduced.

[0020] 3. The bearing assembly uses a combination of second and third bearings, such as a combination of single-row and double-row bearings. Double-row bearings can withstand greater loads, support higher speeds, withstand greater external forces and torques, have higher axial strength, longer service life, and greater durability. Therefore, the combination can withstand large loads and high operating speeds, which helps to further reduce noise, reduce wear, decrease maintenance frequency, increase service life, and reduce maintenance costs.

[0021] 4. The first screw passes through the first washer and is threaded to the end of the shift fork connecting rod pin, so that the first washer fits against the end face of the shift fork connecting rod pin, thus axially limiting the bearing assembly; the second screw passes through the second washer and is threaded to the end of the second pin, so that the second washer fits against the end face of the second pin, thus axially limiting the first bearing.

[0022] 5. A bushing, such as a copper bushing, can also be installed on the inside of the shift fork to provide lubrication, further reduce noise and wear, reduce maintenance frequency, increase service life, and reduce maintenance costs.

[0023] 6. A fourth bearing is installed in the holes at both ends of the two-eye connecting rod, and a fifth bearing is installed at the first end of the small connecting rod. Therefore, the use of multiple connecting node bearings helps to further reduce noise and wear.

[0024] The specific technical solutions adopted in this invention and their beneficial effects will be disclosed in detail in the following specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] Fig. 1 This is an exploded structural diagram of the presser foot drive device for the embroidery machine of the present invention;

[0027] Fig. 2 This is an exploded structural diagram of some components of the presser foot drive device for the embroidery machine of the present invention;

[0028] Fig. 3 This is a front view of the embroidery machine presser foot drive device after assembly according to the present invention;

[0029] Fig. 4 This is a schematic diagram of the assembled components of the embroidery machine presser foot drive device of the present invention;

[0030] In the figure: head housing 10, side plate 101, presser foot cam assembly 11, cam connecting rod 111, first pin 12, rotating sleeve 121, two-eye connecting rod 13, second pin 131, first bearing 132, second screw 133, second washer 134, fourth bearing 135, shift fork connecting rod 14, shift fork 141, shift fork connecting rod pin 142, first screw 143, first washer 144, small connecting rod 15, fifth bearing 151, third pin 152, presser foot drive support assembly 16, fixed sleeve 161, second bearing 162, third bearing 163, spacer 164, presser foot driver 17, guide shaft 18, needle bar drive device 19. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0032] Those skilled in the art will understand that, without conflict, the features in the following embodiments and implementations can be combined with each other.

[0033] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "left," and "right" that indicate orientation or positional relationship are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Furthermore, terms such as "first," "second," and similar expressions are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0036] Example 1

[0037] like Figs. 1 to 4 As shown, a noise-reducing presser foot drive device for an embroidery machine includes a machine head housing 10, a main shaft (not shown) that passes laterally through the machine head housing, a guide shaft 18 that is vertically mounted on the machine head housing 10, and a presser foot driver 17 that is slidably mounted on the guide shaft 18 and driven by the main shaft. The main shaft is connected to a presser foot cam assembly 11, which includes a presser foot cam with a cam link 111. The presser foot drive device also includes a first pin 12, a second pin 131, a two-eye link 13, a shift fork link 14, a shift fork link pin 142, and a small link 15. The first pin 12 is typically connected to the needle bar drive link assembly of a needle bar drive device 19 (see prior art for details). The shift fork link pin 142 is connected to the machine head housing 10. The eyelet at the first end of the two-eye connecting rod 13 is connected to the first pin 12 in a rotatable connection. The eyelet at the second end of the two-eye connecting rod is connected to the second pin 131 in a rotatable connection. The second pin 131 passes through the free end of the cam connecting rod 111 and is connected to the first bearing 132. The first end of the shift fork connecting rod 14 is provided with a shift fork 141. The first bearing 132 is located inside the shift fork 141. The middle part of the shift fork connecting rod is connected to the shift fork connecting rod pin 142. The second end of the shift fork connecting rod 14 is connected to the first end of the small connecting rod 15. The second end of the small connecting rod 15 is connected to the pressure foot driver 17.

[0038] In the above technical solution, the shift fork connecting rod connects the two-eye connecting rod and the small connecting rod, and the two-eye connecting rod is also connected to the presser foot cam assembly. Therefore, the shift fork connecting rod is located in the middle of the entire presser foot drive device transmission chain of the embroidery machine, thus having the greatest effect on noise reduction. On the one hand, the eyelet at the second end of the two-eye connecting rod is connected to the second pin, which passes through the free end of the cam connecting rod and connects to the first bearing. Since the first bearing and the shift fork are in a rolling connection, friction is reduced, thus lowering noise. On the other hand, the shift fork transmission structure itself has a low coefficient of friction, less wear, and low noise. At the same time, the first bearing can move relatively within the shift fork, which is a flexible connection, and compared with a rigid connection, it can reduce noise. Therefore, the presser foot drive device of the present invention can significantly reduce operating noise. Compared with the presser foot drive device in the prior art, it can reduce noise by 5-8 dB.

[0039] In addition, since the first bearing and the shift fork are connected by a rolling connection, and the first bearing can move relative to the shift fork, it is relatively rigidly connected, which can reduce wear at the transmission node, increase service life, and reduce maintenance costs.

[0040] Furthermore, the presser foot drive device also includes a presser foot drive support assembly 16, which includes a fixed sleeve 161 and a bearing assembly installed within the fixed sleeve. The shift fork connecting rod pin 142 is supported by the bearing assembly. This technical solution reduces operating noise at the shift fork connecting rod pin by using the rolling support of the bearing assembly, thereby reducing wear, decreasing maintenance frequency, increasing service life, and lowering maintenance costs.

[0041] Specifically, the bearing assembly includes a second bearing 162, a third bearing 163, and a spacer 164 separating the second and third bearings. Furthermore, one of the second and third bearings is a double-row bearing; for example, the second bearing 162, located near the shift fork connecting rod, is a double-row bearing.

[0042] Among them, the advantages of double-row bearings are:

[0043] 1. Bearing greater load: Compared with single-row bearings, double-row bearings have a stronger load-bearing capacity and can withstand greater loads, so they are suitable for mechanical equipment with heavy loads.

[0044] 2. High speed: The internal design of the double-row bearing is reasonable, which can support higher speeds and meet the needs of high-speed rotation.

[0045] 3. High rigidity: The structure of double row bearings is more robust and has higher rigidity, enabling them to withstand greater external forces and torques.

[0046] 4. High axial strength: The structure of the double-row bearing enables it to withstand greater axial loads and reduces rotor axial vibration.

[0047] 5. Long service life: Due to the more robust and durable structure of double-row bearings, their service life is longer than that of single-row bearings.

[0048] Therefore, the bearing assembly adopts a combination of second and third bearings, such as a combination of single-row and double-row bearings, which can withstand large loads and high operating speeds, and is conducive to further reducing noise, reducing wear, reducing maintenance frequency, increasing service life, and reducing maintenance costs.

[0049] Furthermore, the shift fork connecting rod pin 142 is also connected to a first screw 143 and a first washer 144. The first screw passes through the first washer and is threadedly connected to the end of the shift fork connecting rod pin, so that the first washer fits against the end face of the shift fork connecting rod pin. This provides axial positioning for the bearing assembly. The second pin 131 is also connected to a second screw 133 and a second washer 134. The second screw passes through the second washer and is threadedly connected to the end of the second pin, so that the second washer fits against the end face of the second pin. This provides axial positioning for the first bearing assembly.

[0050] To facilitate the installation of the presser foot drive support assembly, a side plate 101 is installed on the left side of the machine head housing, and the presser foot drive support assembly is installed on the side plate 101.

[0051] The first pin 12 includes a pin body and a rotating sleeve 121, such as a steel sleeve, connected to the pin body. A fourth bearing 135 is installed in the hole at the first end of the two-eyed connecting rod, and the rotating sleeve 121 is rotatably supported by the fourth bearing 135. 。 A fourth bearing 135 is also installed in the hole at the second end of the two-eyed connecting rod, and is connected to the second pin 131. Fifth bearings 151 are installed at both ends of the small connecting rod 15, and the fifth bearings are connected to a third pin 152, which is connected to the first end of the shift fork connecting rod. The first bearing is a double-row bearing. A sixth bearing is installed in the holes at both ends of the two-eyed connecting rod. Therefore, the above technical solution, through the use of multiple connecting node bearings, helps to further reduce noise and wear.

[0052] Furthermore, a bushing, such as a copper bushing, can be provided on the inner side of the shift fork to provide lubrication, further reduce noise and wear, reduce maintenance frequency, and increase service life.

[0053] Preferably, the presser foot cam is a metal cam. Existing presser foot cams use nylon cams, which are limited by the material and outer diameter space of nylon cams, and are prone to breakage or wear at high speeds, making it unable to break through the speed limit. Using a metal, such as an eccentric cam made of steel, the stability and durability are greatly improved.

[0054] Example 2

[0055] An embroidery machine includes the presser foot drive device described in Embodiment 1.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A noise-reducing presser foot drive device for an embroidery machine, comprising a machine head housing, a main shaft passing laterally through the machine head housing, a guide shaft vertically mounted on the machine head housing, and a presser foot driver slidably mounted on the guide shaft and driven by the main shaft, wherein the main shaft is connected to a presser foot cam assembly, the presser foot cam assembly comprising a presser foot cam having a cam link, characterized in that: The presser foot drive device further includes a first pin, a second pin, a two-eye connecting rod, a shift fork connecting rod, a shift fork connecting rod pin, and a small connecting rod. The hole at the first end of the two-eye connecting rod is connected to the first pin, and the hole at the second end of the two-eye connecting rod is connected to the second pin. The second pin passes through the free end of the cam connecting rod and is connected to the first bearing. The first end of the shift fork connecting rod is provided with a shift fork, and the first bearing is located inside the shift fork. The middle part of the shift fork connecting rod is connected to the shift fork connecting rod pin. The second end of the shift fork connecting rod is connected to the first end of the small connecting rod, and the second end of the small connecting rod is connected to the presser foot driver. The presser foot drive device further includes a presser foot drive support assembly, which includes a fixed sleeve and a bearing assembly installed in the fixed sleeve. The shift fork connecting rod pin is supported by the bearing assembly. The first end of the small connecting rod is equipped with a fifth bearing, and the fifth bearing is connected to a third pin. The third pin is connected to the first end of the shift fork connecting rod.

2. The embroidery machine presser foot drive device according to claim 1, characterized in that: The bearing assembly includes a second bearing, a third bearing, and a spacer separating the second bearing and the third bearing.

3. The embroidery machine presser foot drive device according to claim 1, characterized in that: The shift fork connecting rod pin is also connected to a first screw and a first washer. The first screw passes through the first washer and is threadedly connected to the end of the shift fork connecting rod pin, so that the first washer fits against the end face of the shift fork connecting rod pin.

4. The embroidery machine presser foot drive device according to claim 1, characterized in that: A side plate is installed on the left side of the head housing, and the presser foot drive support assembly is installed on the side plate; and / or, a bushing is provided on the inner side of the shift fork.

5. The embroidery machine presser foot drive device according to claim 1, characterized in that: The second pin is also connected to a second screw and a second washer. The second screw passes through the second washer and is threaded to the end of the second pin, so that the second washer fits against the end face of the second pin.

6. The embroidery machine presser foot drive device according to claim 1, characterized in that: The first pin includes a pin body and a rotating sleeve connected to the pin body. A fourth bearing is installed in the holes at both ends of the two-eye connecting rod. The rotating sleeve is rotatably supported by the fourth bearing in the hole at the first end of the two-eye connecting rod. The second pin is rotatably supported by the fourth bearing in the hole at the second end of the two-eye connecting rod.

7. The embroidery machine presser foot drive device according to claim 2, characterized in that: The first bearing is a double-row bearing; and / or, one of the second and third bearings is a double-row bearing.

8. An embroidery machine, characterized in that: Includes the presser foot drive device for an embroidery machine as described in any one of claims 1 to 7.

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