Four-plus-one-needle color changing cam mechanism for embroidery machine head

Abstract

The utility model relates to a four-plus-one-needle color changing cam mechanism for an embroidery machine head, which belongs to the technical field of embroidery machines and comprises a rotating shaft, a four-plus-one-needle color changing cam shaft fixedly sleeved with the rotating shaft is arranged on the rotating shaft, and bearing components are arranged at two ends of the four-plus-one-needle color changing cam shaft. A spiral cam groove extending in a spiral shape is formed in the four-plus-one-needle color changing cam shaft, the number of turns of the spiral cam groove is 2.25, and needle stopping grooves distributed at intervals in a staggered mode are formed in the inner walls of the two sides of the spiral cam groove. The device has the characteristics of compact structure, good operation stability and long service life. And quick switching of colors of four plus one stitch of the embroidery machine is realized. The embroidering efficiency and flexibility are improved, and the embroidering requirements of complex patterns can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery machines, in particular to a four-plus-one needle color-changing cam mechanism for an embroidery machine head. Background Art

[0002] Embroidery machines are machines used for embroidery, also known as embroidery machines. As an industrial sewing equipment, they have been widely used. In industrial sewing, especially in the embroidery process, in order to make the product more beautiful, it is often necessary to make colorful patterns, which requires constantly changing the color of the thread during the work process, the so-called color change.

[0003] The embroidery machine mainly consists of two parts: the up and down movement of the head and the movement of the embroidery frame in the X and Y directions. The up and down movement of the head is driven by the spindle motor to drive the transmission shaft to rotate, and the cam and connecting rod of the head convert the rotation into the up and down reciprocating movement of the needle bar to complete the sewing. The movement of the embroidery frame in the X and Y directions is driven by a stepper motor, which drives the fabric to move in a plane, so that the embroidery can be carried out continuously.

[0004] The current color changing device generally includes a machine base and a needle bar frame slidably arranged on the machine base, a plurality of color changing rollers evenly spaced are fixedly arranged on the needle bar frame, a color changing cam is rotatably arranged on the machine base for driving the color changing rollers to move so that the needle bar frame can slide on the machine base, and a threaded cam groove is provided on the color changing cam for matching with the color changing rollers.

[0005] When in use, the color-changing cam rotates, and the color-changing roller cooperates with the threaded cam groove, so that the color-changing cam rotates and drives the color-changing roller to move. Since the color-changing roller is fixed on the needle bar frame, the needle bar frame slides horizontally on the machine base when the color-changing roller moves, thereby achieving color change. The color-changing process is driven by the forward and reverse rotation of the motor, which is easy to cause transmission difference and torque difference, causing axial runout and jamming of the color-changing shaft. Summary of the invention

[0006] The utility model mainly solves the shortcomings of axial runout and jamming in the prior art, and provides a four-plus-one needle color-changing cam mechanism for an embroidery machine head, which has the characteristics of compact structure, good operating stability and long service life. It realizes the rapid switching of the four-plus-one needle colors of the embroidery machine, improves the embroidery efficiency and flexibility, and can meet the embroidery needs of complex patterns.

[0007] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0008] A four-plus-one needle color-changing cam mechanism for an embroidery machine head, including a rotating shaft, on which a four-plus-one needle color-changing camshaft sleeved and fixed to the rotating shaft is provided, and bearing assemblies are provided at both ends of the four-plus-one needle color-changing camshaft. A spiral cam groove extending in a spiral shape is provided on the four-plus-one needle color-changing camshaft. The number of turns of the spiral cam groove is 2.25 turns, and stop needle grooves are provided on both inner walls of the spiral cam groove at staggered intervals.

[0009] The function of the color-changing camshaft is to achieve color change during the embroidery process. Embroidery machines are usually equipped with multiple color-changing cams, and each cam controls a different color. When color change is required, the corresponding color-changing cam will drive the color-changing device, thus realizing rapid color switching. The four-plus-one needle color-changing camshaft stitches four different colors at the same time and realizes rapid color switching by means of an additional needle, i.e., adding one needle. The roller pin in the color-changing device moves along the spiral cam groove under the drive of the four-plus-one needle color-changing camshaft, and the needle-changing process is realized through the contact and separation between the roller pin and the needle position plate.

[0010] Preferably, the bearing assembly includes a bearing fixing sleeve, an outer ring slidably sleeved on the bearing fixing sleeve is provided on the bearing fixing sleeve, and a number of roller columns distributed in a ring shape are provided between the outer ring and the bearing fixing sleeve.

[0011] Preferably, sealing rings fixedly nested with the outer ring are provided on both sides of the roller column.

[0012] Preferably, the cross-section of the outer ring is in a "concave" shape structure, and semicircular oil grooves are provided between both sides of the inner wall of the outer ring and the roller column. The oil grooves are used to store lubricating grease to ensure the lubrication between the outer ring and the roller column.

[0013] Preferably, screw holes are provided on the outer circles of the front and rear parts of the four-plus-one needle color-changing camshaft and are fixed to the rotating shaft by screws.

[0014] Preferably, a shaft sleeve sleeved on the rotating shaft is provided at the connection end of one side of the rotating shaft and the motor, and a sealing plate bolted and fixed to the bearing assembly is provided at the other end of the rotating shaft.

[0015] Preferably, a number of threaded holes for bolted connection and fixation with the bearing assembly and the sealing plate are provided on both end faces of the four-plus-one needle color-changing camshaft.

[0016] The utility model can achieve the following effects:

[0017] The utility model provides a four-plus-one needle color-changing cam mechanism for an embroidery machine head. Compared with the prior art, it has the characteristics of compact structure, good running stability and long service life. It realizes the rapid switching of the colors of the four-plus-one needle of the embroidery machine, improves the embroidery efficiency and flexibility, and can meet the embroidery requirements of complex patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the utility model.

[0019] Figure 2 is a three-dimensional structural view of the four-plus-one needle color-changing camshaft in the utility model.

[0020] Figure 3 is a side view structural view of the four-plus-one needle color-changing camshaft in the utility model.

[0021] Figure 4 is a structural sectional view of the four-plus-one needle color-changing camshaft in the utility model.

[0022] Figure 5 is a schematic structural view of the bearing assembly in the utility model.

[0023] In the figure: rotating shaft 1, shaft sleeve 2, four-plus-one needle color-changing camshaft 3, bearing assembly 4, sealing plate 5, spiral cam groove 6, needle stop groove 7, threaded hole 8, screw hole 9, bearing fixing sleeve 10, outer ring 11, oil groove 12, roller column 13, sealing ring 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will further specifically illustrate the technical solutions of the present utility model through embodiments in conjunction with the drawings.

[0025] Embodiment: As Figures 1-5 shown, a four-plus-one needle color-changing cam mechanism for an embroidery machine head includes a rotating shaft 1. A four-plus-one needle color-changing camshaft 3 sleeved and fixed with the rotating shaft 1 is arranged on the rotating shaft 1. Screw holes 9 for press-fitting and fixing with the rotating shaft 1 by screws are arranged on the outer circles of the front and rear parts of the four-plus-one needle color-changing camshaft 3. A spiral cam groove 6 extending in a spiral shape is arranged on the four-plus-one needle color-changing camshaft 3. The number of turns of the spiral cam groove 6 is 2.25 turns. Needle stop grooves 7 arranged at staggered intervals are arranged on both inner walls of the spiral cam groove 6. Bearing assemblies 4 are arranged at both ends of the four-plus-one needle color-changing camshaft 3. A shaft sleeve 2 sleeved with the rotating shaft 1 is arranged at the connection end of one side of the rotating shaft 1 and the motor, and a sealing plate 5 bolted and fixed with the bearing assembly 4 is arranged at the other end of the rotating shaft 1. Three threaded holes 8 for bolted connection and fixation with the bearing assembly 4 and the sealing plate 5 respectively are arranged on both end faces of the four-plus-one needle color-changing camshaft 3.

[0026] The bearing assembly 4 includes a bearing fixing sleeve 10, on which there is an outer ring 11 slidably sleeved with the bearing fixing sleeve 10. There are 24 roller columns 13 distributed in a ring between the outer ring 11 and the bearing fixing sleeve 10. Sealing rings 14 fixedly nested with the outer ring 11 are provided on both sides of the roller columns 13. The cross-section of the outer ring 11 is in a "concave" shape structure, and semicircular oil grooves 12 are provided between both sides of the inner wall of the outer ring 11 and the roller columns 13.

[0027] In summary, the four-plus-one color-changing cam mechanism for the head of an embroidery machine has the characteristics of compact structure, good running stability and long service life. It realizes the rapid switching of the four-plus-one color of the embroidery machine, improves the embroidery efficiency and flexibility, and can meet the embroidery requirements of complex patterns.

[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0029] In short, the above are only specific embodiments of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the field of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A four-plus-one needle color-changing cam mechanism for an embroidery machine head, characterized in that: The invention comprises a rotating shaft (1), wherein a four-plus-one-needle color-changing cam shaft (3) which is sleeved and fixed to the rotating shaft (1) is provided on the rotating shaft (1), and bearing assemblies (4) are provided at both ends of the four-plus-one-needle color-changing cam shaft (3); a spiral cam groove (6) extending in a spiral shape is provided on the four-plus-one-needle color-changing cam shaft (3), and the number of turns of the spiral cam groove (6) is 2.25, and needle stop grooves (7) which are distributed at staggered intervals are provided on the inner walls of both sides of the spiral cam groove (6).

2. The four-plus-one needle color-changing cam mechanism for an embroidery machine head according to claim 1, characterized in that: The bearing assembly (4) comprises a bearing fixing sleeve (10), the bearing fixing sleeve (10) is provided with an outer ring (11) which is slidably sleeved with the bearing fixing sleeve (10), and a plurality of roller columns (13) distributed in an annular shape are provided between the outer ring (11) and the bearing fixing sleeve (10).

3. The four-plus-one needle color-changing cam mechanism for an embroidery machine head according to claim 2, characterized in that: Sealing rings (14) are provided on both sides of the roller column (13) and are nested and fixed inside the outer ring (11).

4. The four-plus-one needle color-changing cam mechanism for an embroidery machine head according to claim 2, characterized in that: The cross section of the outer ring (11) is in the shape of a "concave" character, and oil grooves (12) in a semicircular structure are provided between the inner walls of the outer ring (11) and the roller column (13) on both sides.

5. The four-plus-one needle color-changing cam mechanism for an embroidery machine head according to claim 1, characterized in that: The front and rear outer circles of the four-plus-one-needle color-changing cam shaft (3) are both provided with screw holes (9) for crimping and fixing the rotating shaft (1) with screws.

6. The four-plus-one needle color-changing cam mechanism for an embroidery machine head according to claim 1, characterized in that: One side of the rotating shaft (1) is provided with a shaft sleeve (2) sleeved with the rotating shaft (1) at the end connected to the motor, and the other end of the rotating shaft (1) is provided with a sealing plate (5) bolted and fixed to the bearing assembly (4).

7. The four-plus-one needle color-changing cam mechanism for an embroidery machine head according to claim 6, characterized in that: Both end surfaces of the four-plus-one-needle color-changing camshaft (3) are provided with a plurality of threaded holes (8) which are respectively bolted and fixed to the bearing assembly (4) and the sealing plate (5).

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