Vertical sewing equipment with fixed machine head

Abstract

The utility model discloses vertical sewing equipment with a fixed machine head, which comprises a machine base, a machine head frame and a vertical shuttle, a needle bar mechanism is arranged above the machine base, the machine head frame is arranged below the machine base and is opposite to the needle bar mechanism, and the machine head frame comprises a horizontally arranged main shaft and a first driving device connected with the main shaft; the machine head frame is provided with a pivoting seat, the pivoting seat is provided with a vertically-arranged driving shaft in a rotating mode, the driving shaft is connected with a main shaft, the main shaft can drive the driving shaft to rotate, the vertical shuttle and the driving shaft are arranged in parallel and are vertically arranged on the pivoting seat, the vertical shuttle is arranged in a pivoting mode, the driving shaft can drive the vertical shuttle to work, and a thread passing hole is formed in the middle of the vertical shuttle. And the needle rod can rotate between a position extending into the thread passing hole and a position far away from the thread passing hole. The main shaft which is horizontally arranged is matched with the driving shaft which is vertically arranged, so that the vertical shuttle which is vertically arranged is driven to rotate, a plurality of devices are driven by one structure, and the whole device is more compact.

Description

Technical Field

[0001] The utility model relates to the field of sewing equipment, in particular to a vertical sewing equipment with a fixed machine head. Background Art

[0002] Industrial sewing equipment is used to sew larger-sized fabrics (such as sofa layers, leather layers, etc.) to meet different production requirements. Larger sizes of fabrics require a continuous supply of sewing thread. The longer the continuous supply time, the more production efficiency can be ensured.

[0003] Existing sewing machines generally include a needle bar located at the top and a shuttle head located at the bottom. The needle bar cooperates with the shuttle head through the reciprocating vertical movement to achieve cross-sewing of the bobbin thread (it can be understood that after the needle bar drives the bobbin thread through the fabric, the shuttle head crosses the bobbin thread away from the fabric into a knot, and then drives the bobbin thread through the fabric, reciprocating in sequence); and a movable template is provided between the needle bar and the shuttle head, which drives the fabric to be sewn.

[0004] When actually sewing thicker fabrics, the problem of skipped stitches often occurs. The main reason is that the existing shuttle head generally needs to rotate in the vertical axis, so the corresponding vertical shuttle will have the problem of offset, resulting in partial miscrossing. Because the fabric is thicker, the existing cam drive method has the same structure. When offset occurs or the needle bar's thread passing stroke offsets, it will affect the coordination between the needle bar and the shuttle head.

[0005] Therefore, there are often problems such as unqualified sewing lines or the tightness of the sewing lines not meeting the requirements, and debugging is also more troublesome. Utility Model Content

[0006] The main purpose of the utility model is to propose a vertical sewing device with a fixed machine head, aiming to streamline the rotating mechanism and improve the structure of the shuttle head part, realize the simplification of the machine head frame, improve the matching relationship between the needle bar and the shuttle head, and have lower production costs and more convenient debugging.

[0007] To achieve the above-mentioned purpose, the present invention provides a vertical sewing device with a fixed head, comprising:

[0008] A machine base, with a needle bar mechanism provided above the machine base;

[0009] A machine head frame, the machine head frame is arranged below the machine base and opposite to the needle bar mechanism, the machine head frame includes a horizontally arranged main shaft and a first drive device connected to the main shaft;

[0010] The head frame is provided with a pivot seat, the pivot seat is provided with a vertically arranged drive shaft rotatably mounted, the drive shaft is connected to the main shaft, and the main shaft can drive the drive shaft to rotate;

[0011] The vertical shuttle is arranged parallel to the drive shaft and vertically on the pivot seat. The vertical shuttle is pivotally arranged, and the drive shaft can drive the vertical shuttle to work. A thread passing hole is provided in the middle of the vertical shuttle, and the needle bar can rotate between a position extending into the thread passing hole and a position away from the thread passing hole.

[0012] In the actual design, the needle bar mechanism is an existing technology and will not be described in detail here. The horizontally arranged main shaft cooperates with the vertically arranged drive shaft to drive the vertical shuttle to rotate, thereby realizing the hooking and pulling of the bottom thread, and then realizing the needle bar sewing the thread body to the fabric. First, the horizontally arranged main shaft can drive multiple mechanisms, such as cutting the bottom thread, guiding the thread, knotting, etc.; one structure drives multiple devices, making the whole more compact;

[0013] The vertical shuttle can provide a larger rotation distance and a lower overall height, which is convenient for equipment assembly. At the same time, the drive shaft and the main shaft are set in parallel, which can provide a more stable rotation torque, and thus can provide a more stable pressure when dialing the line, thereby ensuring the threading of the line, effectively avoiding the problem of wire jump, and at the same time the concentricity is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the utility model Figure 1 ;

[0016] Figure 3 This is a three-dimensional diagram of the utility model Figure 2 ;

[0017] Figure 4 Main axis indication Figure 1 ;

[0018] Figure 5 Main axis indication Figure 2 ;

[0019] Figure 6 This is a schematic diagram of one embodiment of the vertical shuttle.

[0020] Figure 7 Schematic diagram of a sewing machine.

[0021] In the figure,

[0022] 1 is the machine base, 11 is the needle bar mechanism,

[0023] 2 is the head frame, 20 is the main shaft, 21 is the first driving device, 211 is the driven shaft, 212 is the driving shaft, 213 is the first rotary servo motor, 22 is the pivot seat, 23 is the driving shaft, 24 is the first gear belt,

[0024] 3 is the vertical shuttle, 30 is the thread hole,

[0025] 41 is the first bevel gear, 42 is the second bevel gear,

[0026] 51 is the first gear, 52 is the second gear, 53 is the second gear belt,

[0027] 61 is the first eccentric cam, 62 is the second eccentric cam, 63 is the third eccentric cam,

[0028] 7 is the second rotary servo motor, and 8 is the thread transport shuttle. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] like Figures 1 to 7 As shown, a vertical sewing device with a fixed head includes:

[0033] A machine base 1, with a needle bar mechanism 11 provided above the machine base 1;

[0034] The machine head frame 2 is arranged below the machine base 1 and opposite to the needle bar mechanism 11. The machine head frame 2 includes a horizontally arranged main shaft 20 and a first drive device 21 connected to the main shaft 20;

[0035] The head frame 2 is provided with a pivot seat 22, and the pivot seat 22 is provided with a vertically arranged drive shaft 23 rotatably mounted thereon. The drive shaft 23 is connected to the main shaft 20, and the main shaft 20 can drive the drive shaft 23 to rotate;

[0036] The vertical shuttle 3 (wherein the vertical shuttle 3 can be a rotary shuttle or a swing shuttle) is arranged parallel to the drive shaft 23 and vertically arranged on the pivot seat 22. The vertical shuttle 3 is pivotally arranged, and the drive shaft 23 can drive the vertical shuttle 3 to work. A thread passing hole 30 is provided in the middle of the vertical shuttle 3, and the needle bar can rotate between a position extending into the thread passing hole 30 and a position away from the thread passing hole 30.

[0037] In the actual design, the needle bar mechanism 11 is a prior art and will not be described in detail here. The horizontally arranged main shaft 20 cooperates with the vertically arranged drive shaft 23 to drive the vertically arranged shuttle 3 to rotate, thereby realizing the hooking and pulling of the bottom thread, and thus realizing the needle bar sewing the thread body to the fabric. First, the horizontally arranged main shaft 20 can drive multiple mechanisms, such as cutting the bottom thread, guiding the thread, knotting, etc.; realizing that one structure drives multiple devices, making the whole more compact;

[0038] The vertically arranged shuttle 3 can provide a larger rotation distance, and its overall height is lower, which is convenient for equipment assembly. At the same time, the drive shaft 23 and the main shaft 20 are arranged in parallel, which can provide a more stable rotation torque, and thus can provide a more stable pressure when the thread is dialed, thereby ensuring the threading of the thread body, effectively avoiding the problem of wire jumping, and at the same time the concentricity is more stable.

[0039] The structure of the vertical shuttle 3 is prior art and will not be described in detail here.

[0040] Specifically, the first drive device 21 is a first rotary servo motor 213, which is mounted on the front wall of the machine head frame 2. Both ends of the main shaft 20 are pivotally mounted on the machine head frame 2, and one end of the main shaft 20 extending from the left side wall of the machine head frame 2 is provided with a driven shaft 211. The first rotary servo motor 213 is provided with a driving shaft 212 that cooperates with the driven shaft 211. The driving shaft 212 and the driven shaft 211 are connected by a first gear belt 24. This makes the machine head frame 2 more compact overall, and the main shaft 20 can provide more stable torque, making its rotation more stable when operating multiple mechanisms simultaneously, thereby ensuring the stable rotation of the vertical shuttle 3.

[0041] In the embodiment of the present utility model, the pivot seat 22 is provided with an axial hole, the drive shaft 23 is provided in the axial hole, and the upper end and the lower end of the drive shaft 23 both extend out of the axial hole;

[0042] A first bevel gear 41 is provided in the middle of the main shaft 20, and a second bevel gear 42 is provided at the lower end of the drive shaft 23 to cooperate with the first bevel gear 41. The cooperation between the first bevel gear 41 and the second bevel gear ensures that the main shaft 20 can stably drive the vertical shuttle 3.

[0043] Specifically, a first gear is provided at the upper end of the driving shaft 23, and the vertical shuttle 3 is provided with a second gear 52 that matches the first gear. The first gear and the second gear are meshed or connected through an intermediate piece.

[0044] In the embodiment of the present invention, the intermediate member is the second gear belt 53 , which can effectively improve the driving torque through the off-axis drive, ensure the stable rotation of the main shaft 20 , and more accurately control the rotation speed of the vertical shuttle 3 .

[0045] Specifically, the main shaft 20 is provided with a first eccentric cam 61, the outer peripheral wall of which is non-circular, thereby achieving intermittent wire feeding of the wire roller. Of course, it is not limited to the work of the wire roller, and can also be used for the work of other mechanisms.

[0046] In the embodiment of the present invention, the main shaft 20 is provided with a second eccentric cam 62, the middle portion of which is provided with a track groove arranged along its outer circumference, and the track groove is in an arc-shaped structure. This enables intermittent operation of the wire tapping seat; of course, it is not limited to the operation of the wire tapping seat, and can also be used for the operation of other mechanisms.

[0047] Specifically, the main shaft 20 is provided with a third eccentric cam 63, one side of which is a non-planar structure with a convex arc surface. It is generally used for the intermittent operation of the wire blocking mechanism to achieve pause, and of course it can also be used for the operation of the wire twisting mechanism.

[0048] The work of multiple institutions is achieved through three different structures. The structure is relatively stable and avoids the problem of institutional interference.

[0049] In an embodiment of the present utility model, the head frame 2 is further provided with a second driving device, which is arranged adjacent to the first driving device 21. The second driving device is connected to the thread transport shuttle 8, and the thread transport shuttle 8 is used to transport the bottom thread.

[0050] Specifically, the second driving device is a second rotary servo motor 7, thereby realizing the conveyance of the bottom thread.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vertical sewing machine with a fixed head, characterized in that: include: A machine base, with a needle bar mechanism provided above the machine base; A machine head frame, the machine head frame is arranged below the machine base and opposite to the needle bar mechanism, the machine head frame includes a horizontally arranged main shaft and a first drive device connected to the main shaft; The head frame is provided with a pivot seat, the pivot seat is provided with a vertically arranged drive shaft rotatably mounted, the drive shaft is connected to the main shaft, and the main shaft can drive the drive shaft to rotate; The vertical shuttle is arranged parallel to the drive shaft and vertically on the pivot seat. The vertical shuttle is pivotally arranged, and the drive shaft can drive the vertical shuttle to work. A thread passing hole is provided in the middle of the vertical shuttle, and the needle bar can rotate between a position extending into the thread passing hole and a position away from the thread passing hole.

2. The vertical sewing machine with a fixed head according to claim 1, characterized in that: The first driving device is a first rotary servo motor, which is arranged at the front wall of the machine head frame. The two ends of the main shaft are pivotally arranged on the machine head frame, and the end of the main shaft extending out of the left side wall of the machine head frame is provided with a driven shaft. The first rotary servo motor is provided with a driving shaft that cooperates with the driven shaft, and the driving shaft and the driven shaft are connected by a first gear belt.

3. The vertical sewing machine with a fixed head according to claim 1, characterized in that: The pivot seat is provided with an axial hole, the drive shaft is provided in the axial hole, and the upper end and the lower end of the drive shaft both extend out of the axial hole; A first bevel gear is provided at the middle of the main shaft, and a second bevel gear matched with the first bevel gear is provided at the lower end of the drive shaft.

4. The vertical sewing machine with a fixed head according to claim 3, characterized in that: The upper end of the driving shaft is provided with a first gear, and the vertical shuttle is provided with a second gear matched with the first gear. The first gear and the second gear are meshed or connected through an intermediate piece.

5. The vertical sewing machine with a fixed head according to claim 4, characterized in that: The intermediate component is a second gear belt.

6. The vertical sewing machine with a fixed head according to claim 1, characterized in that: The main shaft is provided with a first eccentric cam, and the outer peripheral wall of the first eccentric cam is non-circular.

7. The vertical sewing machine with a fixed head according to claim 1, characterized in that: The main shaft is provided with a second eccentric cam, and a rail groove is provided in the middle portion of the second eccentric cam along its outer circumference, and the rail groove is an arc-shaped structure.

8. The vertical sewing machine with a fixed head according to claim 1, characterized in that: The main shaft is provided with a third eccentric cam, and one side surface of the third eccentric cam is a non-planar structure provided with a convex arc surface.

9. The vertical sewing machine with a fixed head according to claim 1, characterized in that: The head frame is further provided with a second driving device, which is arranged adjacent to the first driving device. The second driving device is connected to a thread transporting shuttle, which is used to transport the bottom thread.

10. The vertical sewing machine with a fixed head according to claim 9, characterized in that: The second driving device is a second rotary servo motor.

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