Needle bar driving mechanism and embroidery machine

Abstract

The utility model discloses a needle bar driving mechanism, which comprises a main shaft, a needle bar driving mechanism and a needle bar driving mechanism, the needle rod driver is connected to the vertically-arranged guide rod in a sliding and sleeving mode, and the needle rod driver is provided with a transversely-arranged transmission shaft; the transmission connecting rod assembly is in transmission connection with the eccentric cam and the transmission shaft; the guide assembly acts on the needle rod driver and provides circumferential stopping force for the needle rod driver, and the guide assembly is used for preventing the needle rod driver from rotating around the guide rod in the circumferential direction when the needle rod driver does lifting reciprocating motion along the guide rod. The utility model further discloses an embroidery machine with the needle bar driving mechanism. The needle bar driver has the advantage that damage caused by circumferential rotation of the needle bar driver is avoided.

Description

Technical Field

[0001] The utility model relates to a needle bar driving mechanism and an embroidery machine, which are applied in the technical field of embroidery machines. Background Art

[0002] In the prior art of embroidery machines, the needle bar is driven by a needle bar driver to perform lifting and reciprocating motion. The needle bar driver is slidably sleeved on the guide rod. When driven by the main shaft, the needle bar driver is driven to lift and reciprocate through the transmission of the eccentric cam and the transmission connecting rod assembly. During the lifting and reciprocating motion of the needle bar driver, the needle bar driver will rotate circumferentially around the guide rod, thus causing axial deviation of the transmission shaft on the needle bar driver, which in turn causes damage to the transmission shaft. In addition, it is also easy to cause damage to the transmission connecting rod assembly, which affects the service life. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a needle bar driving mechanism and an embroidery machine, so as to avoid damage caused by the circumferential rotation of the needle bar driver.

[0004] The utility model is realized through the following technical solutions.

[0005] A needle bar driving mechanism, comprising:

[0006] A main shaft, wherein an eccentric cam is connected to the main shaft;

[0007] A needle bar driver is slidably sleeved on the vertically arranged guide rod, and the needle bar driver has a transversely arranged transmission shaft;

[0008] A transmission connecting rod assembly, which transmission connects the eccentric cam and the transmission shaft;

[0009] The guide assembly acts on the needle bar driver and provides a circumferential stopping force thereto, so as to prevent the needle bar driver from rotating circumferentially around the guide rod when the needle bar driver moves up and down and reciprocates along the guide rod.

[0010] As a further improvement of the present invention, the guide assembly includes a guide component and a guide element, the guide component extends in a straight line and is parallel to the guide rod, the guide element is movably connected to the guide component and can move along the guide component, and the guide component or the guide element is arranged on the needle bar driver.

[0011] As a further improvement of the present invention, the length of the guide component is not less than the travel distance of the needle bar driver.

[0012] As a further improvement of the present invention, the needle bar driver includes a needle bar drive frame slidably sleeved on the guide rod, and a needle bar transmission connecting body rotatably connected to the needle bar drive frame; the transmission shaft is transversely arranged on the needle bar drive frame, and the rotation of the needle bar transmission connecting part is used to connect or separate with the needle bar.

[0013] As a further improvement of the present invention, a rotational matching structure is provided on the side of the needle bar transmission connecting body, which is used to be pushed to rotate the needle bar transmission connecting body.

[0014] As a further improvement of the present invention, the guide element and the rotational matching structure are respectively located at two side positions of the needle bar driver.

[0015] As a further improvement of the present invention, the guide element is arranged on the side of the needle bar driving frame; the guide component is arranged on the side wall or side plate of the casing.

[0016] As a further improvement of the present invention, the guide component is arranged on the side of the needle bar driving frame; the guide element is arranged on the side wall or side plate of the casing.

[0017] As a further improvement of the present invention, the transmission shaft includes a main body section that is transmission-connected to the transmission connecting rod assembly and an extension section that continues to extend along the main body section, and the guide element is arranged at the end of the extension section; the guide component is arranged on the side wall or side panel of the casing.

[0018] As a further improvement of the present invention, the transmission connecting rod assembly includes a first connecting rod, a second connecting rod, and a third connecting rod; one end of the first connecting rod is rotatably sleeved on the eccentric cam, and the other end is rotatably connected to the middle part of the second connecting rod, the rear end of the second connecting rod is directly or indirectly rotatably connected to the casing, and the two ends of the third connecting rod are respectively rotatably connected to the front end of the second connecting rod and the transmission shaft.

[0019] As a further improvement of the present invention, the guide component has a slide groove extending along its length direction, and the guide element is movably connected to the slide groove and can move along the slide groove.

[0020] As a further improvement of the utility model, the guide component has a slide rail extending along its length direction, and at least one guide element is provided, which is movably connected to the slide rail and can move along the slide rail.

[0021] As a further improvement of the present invention, the guide element and the guide component are slidably matched.

[0022] As a further improvement of the present invention, the guide element and the guide component are in rolling cooperation.

[0023] An embroidery machine comprises the needle bar driving mechanism.

[0024] Beneficial effects of the utility model:

[0025] The guide assembly can ensure the state stability of the needle bar driver when it moves up and down and reciprocates along the guide rod, and avoid damage to the transmission shaft and the transmission connecting rod assembly due to circumferential rotation, thereby extending their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following is a detailed description of the preferred implementation examples of the present invention with reference to the accompanying drawings to help understand the purpose and advantages of the present invention, wherein:

[0027] Figure 1 It is a schematic diagram of the embroidery machine head;

[0028] Figure 2 is a schematic diagram of the needle bar driving mechanism in one viewing angle;

[0029] Figure 3 is a schematic diagram of the needle bar driving mechanism from another perspective;

[0030] Figure 4 A schematic diagram of the guide assembly. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below based on the accompanying drawings and implementation cases.

[0032] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. The words "inside" and "outside" refer to the direction toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to different locations and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0033] Implementation Case 1:

[0034] A needle bar drive mechanism, used on the head of an embroidery machine, referring to Figure 1-Figure 4 , which includes a main shaft 1, a needle bar driver 2, a transmission connecting rod assembly 3 and a guide assembly.

[0035] Among them, the main shaft 1 horizontally penetrates the housing 101 of the machine head, the main shaft 1 is connected with an eccentric cam 11, a vertically extending guide rod 102 is arranged in the housing 101, the needle bar driver 2 is slidably sleeved on the guide rod 102, the needle bar driver 2 has a horizontally arranged transmission shaft 23, the transmission connecting rod assembly 3 is transmission-connected with the eccentric cam 11 and the transmission shaft 23, the main shaft 1 drives the eccentric cam 11 to rotate around the main shaft 1 when it is running and rotating, and drives the needle bar driver 2 to perform lifting and reciprocating motion along the guide rod 102 through the transmission connecting rod assembly 3. A needle bar frame 104 is arranged in front of the housing 101, and a needle bar 103 is vertically arranged on the needle bar frame 104. The needle bar driver 2 is used to drive the needle bar 103 to perform lifting and reciprocating motion, so that the rust needle at the bottom of the needle bar 103 can embroider.

[0036] In the present embodiment, the guide assembly acts on the needle bar driver 2, and is used to prevent the needle bar driver 2 from circumferentially rotating around the guide rod 102 when the needle bar driver 2 moves up and down and reciprocates along the guide rod 102. This can prevent the transmission shaft 23 of the needle bar driver 2 from deviating from its axial direction due to the circumferential rotation, thereby preventing damage to the transmission shaft 23 and also preventing damage to the transmission connecting rod assembly 3. Therefore, the guide assembly can ensure the state stability of the needle bar driver 2 when it moves up and down and reciprocates along the guide rod 102, and avoid damage to the transmission shaft 23 and the transmission connecting rod assembly 3 due to circumferential rotation, thereby extending its service life.

[0037] The guide assembly of this embodiment includes a guide component 41 and a guide element 42, wherein the guide component 41 extends in a straight line and is parallel to the guide rod 102, and the guide element 42 is movably connected to the guide component 41 and can move along the guide component 41, that is, move in a direction parallel to the guide rod 102, wherein the guide component 41 or the guide element 42 is arranged on the needle bar driver 2. The matching relationship between the guide component 41 and the guide element 42 enables the two to play a vertical guiding role with each other and restricts the relative movement of the two in the lateral direction, therefore, one of the two is arranged on the needle bar driver 2, and the vertical guidance of the two is adapted to the lifting and reciprocating movement of the needle bar driver 2, and the restriction of the movement in the lateral direction can effectively prevent the needle bar driver 2 from rotating in the circumferential direction.

[0038] In this embodiment, the length of the guide component 41 is not less than the travel distance of the needle bar driver 2 to prevent the guide component 41 and the guide element 42 from being separated or stuck during the vertical reciprocating motion of the needle bar driver 2.

[0039] For the needle bar driver 2, in this embodiment, the needle bar driver 2 includes a needle bar driver frame 21 and a needle bar transmission connector 22, wherein the needle bar driver frame 21 is slidably connected to the guide rod 102, and the needle bar transmission connector 22 is rotatably connected to the needle bar driver frame 21, so that the needle bar transmission connector 22 can rotate circumferentially relative to the guide rod 102, and the circumferential rotation of the needle bar transmission connector 22 is used to connect or separate with the needle bar 103, and is mainly used when the embroidery machine needs to replace the needle bar 103 for embroidery. For the needle bar driver 2, the needle bar driver frame 21 needs to avoid circumferential rotation when it reciprocates vertically, so the transmission shaft 23 is horizontally arranged on the needle bar driver frame 21, and the guide component 41 or the guide element 42 is arranged on the needle bar driver frame 21.

[0040] In the present embodiment, since the needle bar transmission connector 22 needs to complete the separation or connection with the needle bar driver 2 through circumferential rotation, although the needle bar transmission connector 22 is rotatably connected to the needle bar drive frame 21, the circumferential rotation of the needle bar 103 drive connector on the needle bar drive frame 21 will cause the needle bar drive frame 21 to rotate slightly, and the matching relationship between the guide component 41 and the guide element 42 can prevent the needle bar drive frame 21 from rotating when the needle bar transmission connector 22 rotates circumferentially.

[0041] For the needle bar transmission connector 22, in the present embodiment, a rotating matching structure 221 is provided on the side of the needle bar transmission connector 22 for being pushed to rotate the needle bar transmission connector 22, and a component for pushing the rotating matching structure 221, such as an electromagnet push rod, etc., is configured on the housing 101.

[0042] Preferably, the guide element 42 and the rotational matching structure 221 are respectively located at two side positions of the needle bar driver 2 to optimize the space arrangement in the housing 101 and avoid interference and collision.

[0043] Regarding the setting positions of the guide component 41 and the guide element 42 , in the first embodiment, the guide element 42 is set on the side of the needle bar driving frame 21 , and the guide component 41 is set on the side wall or side plate of the casing 101 .

[0044] In the second embodiment, the guide component 41 is arranged on the side of the needle bar driving frame 21 , and the guide element 42 is arranged on the side wall or side plate of the housing 101 .

[0045] In the third embodiment, the transmission shaft 23 includes a main body section and an extension section extending along the main body section, wherein the transmission connecting rod assembly 3 is transmission-connected to the main body section, the guide element 42 is arranged at the end of the extension section, and the guide component 41 is arranged on the side wall or side panel of the casing 101.

[0046] The above three embodiments can all realize the movable connection relationship between the guide component 41 and the guide element 42, and during the reciprocating movement of the needle bar driver 2, the guide element 42 and the guide component 41 have a vertical relative movable relationship, that is, the circumferential rotation of the needle bar driver 2 can be avoided.

[0047] In this embodiment, the transmission connecting rod assembly 3 includes a first connecting rod 31, a second connecting rod 32, and a third connecting rod 33. One end of the first connecting rod 31 has a large collar structure and is rotatably sleeved on the eccentric cam 11, and the other end is rotatably connected to the middle of the second connecting rod 32, and the rear end of the second connecting rod 32 is directly or indirectly rotatably connected to the housing 101, and the two ends of the third connecting rod 33 are rotatably connected to the front end of the second connecting rod 32 and the transmission shaft 23, respectively. The transmission connecting rod assembly 3 of the present embodiment is connected to the transmission shaft 23 through a three-link structure, thereby driving the lifting and reciprocating motion of the needle bar driver 2. Therefore, the transmission connecting rod assembly 3 has multiple rotation connection points. If the needle bar driver 2 rotates circumferentially during the vertical reciprocating motion, bending torque will be generated on these rotation connection points, thereby destroying the structural stability of the transmission connecting rod assembly 3 and causing it to gradually deteriorate. Therefore, the guide assembly provided in the present embodiment prevents the needle bar driver 2 from rotating circumferentially, thereby protecting the various rotation connection points of the transmission connecting rod assembly 3 and effectively extending the service life of the transmission connecting rod assembly 3.

[0048] As for the specific structural arrangement of the guide component 41 , in this embodiment, the guide component 41 has a slide groove 411 extending along its length direction, and the guide element 42 is movably connected to the slide groove 411 and can slide along the slide groove 411 .

[0049] In addition, it can also be configured as follows: the guide component 41 has a slide rail extending along its length direction, and at least one guide element 42 is provided, which is movably connected to the slide rail and can move along the slide rail. For example, a guide element 42 can be provided on the left and right sides of the slide rail respectively.

[0050] The above two structural arrangements of the guide component 41 can both realize a movable connection relationship between the guide component 41 and the guide element 42 in the vertical direction.

[0051] Regarding the specific setting of the movable connection relationship between the guide element 42 and the guide component 41, in one embodiment, the guide element 42 and the guide component 41 are slidably matched, for example, the guide component 41 is provided with a slide groove 411, and the guide member is a rigid structure, inserted in the slide groove 411 and can slide along the slide groove 411, that is, the sliding match between the guide element 42 and the guide component 41 is achieved; for another example, the guide component 41 is set as a slide rail, and the guide element 42 is provided with two and both are rigid components, clamped on both sides of the slide rail and can slide along the slide rail, which can also achieve the sliding match between the guide element 42 and the guide component 41. The sliding match relationship structure is simple to set, but it will produce a certain amount of friction. Under the condition of high-speed reciprocating motion of the needle bar driver 2, it will cause large friction loss and easy damage.

[0052] In another embodiment, the guide element 42 and the guide component 41 are in rolling cooperation, for example, the guide component 41 is provided with a slide groove 411, the guide member is provided as a rolling member, specifically, it can be provided as a bearing, the guide member is provided in a rolling manner in the slide groove 411 and can roll along the slide groove 411, thus realizing the rolling cooperation between the guide element 42 and the guide component 41; for another example, the guide component 41 is provided as a slide rail, the guide element 42 is provided with two rolling members, which are clamped on both sides of the slide rail and can roll along the slide rail, thus realizing the rolling cooperation between the guide element 42 and the guide component 41. Compared with the sliding cooperation, the friction loss of the rolling cooperation is smaller, and it is more suitable for the application condition of the high-speed reciprocating motion of the needle bar driver 2.

[0053] Implementation Case 2:

[0054] An embroidery machine includes a needle bar driving mechanism, and the needle bar driving mechanism is shown in implementation case 1.

[0055] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or replace some of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the implementation cases of the utility model.

Claims

1. A needle bar driving mechanism, characterized in that: include: A main shaft, wherein an eccentric cam is connected to the main shaft; A needle bar driver is slidably sleeved on the vertically arranged guide bar, and the needle bar driver has a transversely arranged transmission shaft; A transmission connecting rod assembly, which transmission connects the eccentric cam and the transmission shaft; A guide assembly, acting on the needle bar driver, is used to prevent the needle bar driver from rotating around the guide rod when the needle bar driver moves up and down and reciprocates along the guide rod; The guide assembly includes a guide component and a guide element. The guide component extends in a straight line and is parallel to the guide rod. The guide element is movably connected to the guide component and can move along the guide component. The guide component or the guide element is arranged on the needle bar driver.

2. The needle bar drive mechanism according to claim 1, wherein the length of the guide component is not less than the stroke distance of the needle bar driver.

3. The needle bar drive mechanism according to claim 1, wherein the needle bar driver comprises a needle bar drive frame slidably sleeved on the guide rod, and a needle bar transmission connecting body rotatably connected to the needle bar drive frame; the rotation of the needle bar transmission connecting part is used to connect or separate with the needle bar, the transmission shaft is transversely arranged on the needle bar drive frame, and the guide component or the guide element is arranged on the needle bar drive frame.

4. The needle bar driving mechanism according to claim 3, characterized in that: A rotational matching structure is provided on the side of the needle bar transmission connecting body, which is used to be pushed so that the needle bar transmission connecting body rotates.

5. The needle bar driving mechanism according to claim 4, characterized in that: The guide element and the rotational matching structure are respectively located at two lateral positions of the needle bar driver.

6. The needle bar driving mechanism according to claim 1, characterized in that: The guide element is arranged on the side of the needle bar driving frame; and the guide component is arranged on the side wall or the side plate of the casing.

7. The needle bar driving mechanism according to claim 1, characterized in that: The guide component is arranged on the side of the needle bar driving frame; and the guide element is arranged on the side wall or the side plate of the casing.

8. The needle bar driving mechanism according to claim 1, characterized in that: The transmission shaft comprises a main body section which is transmission-connected to the transmission connecting rod assembly, and an extension section which continues to extend along the main body section. The guide element is arranged at the end of the extension section. The guide component is arranged on the side wall or side plate of the casing.

9. The needle bar driving mechanism according to any one of claims 1 to 8, characterized in that: The transmission connecting rod assembly includes a first connecting rod, a second connecting rod, and a third connecting rod; one end of the first connecting rod is rotatably sleeved on the eccentric cam, and the other end is rotatably connected to the middle part of the second connecting rod, the rear end of the second connecting rod is directly or indirectly rotatably connected to the casing, and the two ends of the third connecting rod are rotatably connected to the front end of the second connecting rod and the transmission shaft respectively.

10. The needle bar driving mechanism according to any one of claims 1 to 8, characterized in that: The guide component has a slide groove extending along its length direction, and the guide element is movably connected to the slide groove and can move along the slide groove.

11. The needle bar driving mechanism according to any one of claims 1 to 8, characterized in that: The guide component has a slide rail extending along its length direction, and at least one guide element is provided, which is movably connected to the slide rail and can move along the slide rail.

12. The needle bar driving mechanism according to any one of claims 1 to 8, characterized in that: The guide element and the guide component are slidably matched.

13. The needle bar driving mechanism according to any one of claims 1 to 8, characterized in that: The guide element and the guide component are in rolling cooperation.

14. An embroidery machine, characterized in that: It comprises a needle bar driving mechanism as described in any one of claims 1-13.

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