阅读说明：本技术 可降低起针时针杆高度的针杆驱动结构及机头及绣花机 (Needle bar driving structure capable of reducing needle bar height during needle raising, machine head and embroidery machine ) 是由 王海江 田桂郁 季海彬 于 2020-04-27 设计创作，主要内容包括：本发明公开了一种可降低起针时针杆高度的针杆驱动结构及机头及绣花机,其中可降低起针时针杆高度的针杆驱动结构包括具有上止点和下止点的针杆、驱动针杆运动的针杆驱动器,所述针杆驱动器包括针杆驱动块,所述针杆驱动块设有与下止点配合的卡槽,还包括起针时压下针杆的压针杆组件。本发明采用的技术方案,当起针时,压针杆组件将针杆往下压,以使下止点与卡槽高度对应,针杆驱动块可以转动使下止点嵌入驱动块卡槽内,从而针杆可以跟随针杆驱动器做上下运动。(The invention discloses a needle bar driving structure capable of reducing the height of a needle bar during needle raising, a machine head and an embroidery machine, wherein the needle bar driving structure capable of reducing the height of the needle bar during needle raising comprises a needle bar with an upper dead point and a lower dead point and a needle bar driver for driving the needle bar to move, the needle bar driver comprises a needle bar driving block, the needle bar driving block is provided with a clamping groove matched with the lower dead point, and the needle bar driving block further comprises a needle pressing bar assembly for pressing down the needle bar during needle raising. According to the technical scheme, when the needle is lifted, the needle bar is pressed downwards by the needle bar pressing component, so that the lower dead point corresponds to the height of the clamping groove, the needle bar driving block can rotate to enable the lower dead point to be embedded into the clamping groove of the driving block, and the needle bar can move up and down along with the needle bar driver.)

1. Needle bar drive structure of needle bar height when can reduce the rise of a needle, including the needle bar that has top dead center and lower dead center, the needle bar driver of drive needle bar motion, the needle bar driver includes the needle bar drive block, the needle bar drive block be equipped with lower dead center complex draw-in groove, its characterized in that: still include and push down the needle bar when the rise to make lower dead center and draw-in groove height correspond's tucking bar subassembly.

2. A needle bar driving structure capable of reducing the height of a needle bar at the time of needle raising according to claim 1, wherein: the needle bar pressing component comprises a needle bar pressing rod for pressing a top dead center and a driving piece for driving the needle bar pressing rod to act.

3. A needle bar driving structure capable of reducing the height of a needle bar at the time of needle raising according to claim 2, wherein: the bottom of the needle bar pressure lever is provided with a pressure plate pressed with the top dead center, and the pressure plate is provided with a limit hole matched with the needle bar and the guide rod.

4. A needle bar driving structure capable of reducing the height of a needle bar at the time of needle raising according to claim 3, wherein: the needle rod pressure lever is connected with a return spring which can realize upward return after the pressure plate is disengaged from the upper stop point.

5. A needle bar drive structure capable of reducing the height of a needle bar at the time of needle raising according to any one of claims 2 to 4, wherein: the needle bar pressing component also comprises a swinging shaft and a swinging rod which is rotatably connected with the swinging shaft, and the needle bar pressing rod is driven by the swinging rod.

6. A needle bar driving structure capable of reducing the height of a needle bar at the time of needle raising according to claim 5, wherein: the pressing needle rod assembly further comprises an air cylinder, and a piston rod of the air cylinder stretches and retracts to drive the swinging rod to rotate.

7. A needle bar drive structure capable of reducing the height of a needle bar at the time of needle raising according to claim 6, wherein: the swing rod is provided with a rear protruding part protruding backwards, the piston rod is connected with a top plate, and the rear protruding part is connected with a rolling bearing matched with the top plate in a rolling mode.

8. A needle bar drive structure capable of reducing the height of a needle bar at the time of needle raising according to claim 6, wherein: the swing rod is provided with a swing head protruding forwards, and the upper end of the needle rod pressure rod is connected with a rolling bearing in rolling fit with the swing head.

9. Embroidery machine aircraft nose, its characterized in that: a needle bar driving structure for reducing the height of a needle bar at the time of needle raising according to any one of claims 1 to 8.

10. Embroidery machine, its characterized in that: including the embroidery machine head of claim 9.

Technical Field

The invention belongs to the technical field of embroidery machines.

Background

In the stop state of the conventional embroidery machine, the height of the bottom of the presser foot from the needle plate is shown in fig. 1, and the height is usually 27 mm. The automobile seat cushion machine uses leather and other thick materials, so that the distance from the bottom end of the presser foot to the surface of the needle plate needs to be increased in a shutdown state, and leather is convenient to replace. Therefore, the shuttle box body can be lowered in the height direction. However, under the condition that the machine head is not changed, the vertical stroke of the driver is not changed, so in order to compensate the reduction of the height position of the shuttle box body, the smooth embroidery can be ensured by lengthening the needle rod.

However, after the needle rod is lengthened, the height position of the lower dead point can be lifted in the parking state, so that even if the driver moves to the highest position in the needle raising process, the clamping groove of the driver cannot touch the lower dead point, and the needle rod cannot move up and down along with the driver. Therefore, a device is needed, and the needle rod is pressed downwards during needle raising, so that the lower dead point on the needle rod is embedded into the clamping groove of the driver.

The thread hooking device of the conventional embroidery machine is fastened at the bottom of the machine shell and is parallel to the bottom of the machine shell, the automobile seat cushion machine has thicker leather, and the height requirement from the lower end of the machine shell to the needle plate surface is higher than that of the general embroidery machine in order to replace leather, so that the position of the shuttle box body in the height direction can be reduced. However, when the shuttle box is lowered, the conventional thread hooking device cannot complete thread hooking, and therefore the height position of the thread hooking device needs to be lowered.

Disclosure of Invention

The invention aims to solve the technical problem of providing a needle bar driving structure capable of reducing the height of a needle bar during needle raising, which can press the needle bar downwards during needle raising so that a lower dead point on the needle bar is embedded into a clamping groove of a driving block.

In order to solve the technical problems, the invention adopts the following technical scheme: needle bar drive structure of needle bar height when can reduce the rise needle, including needle bar, the needle bar driver of drive needle bar motion that has top dead center and lower dead center, the needle bar driver includes the needle bar drive block, the needle bar drive block be equipped with lower dead center complex draw-in groove, still include down pressing the needle bar when the rise needle to make lower dead center and the high tucking bar subassembly that corresponds of draw-in groove.

Preferably, the needle bar pressing rod assembly comprises a needle bar pressing rod for pressing a top dead center and a driving piece for driving the needle bar pressing rod to act.

Preferably, the bottom of the needle rod pressure lever is provided with a pressure plate pressed with the top dead center, and the pressure plate is provided with two limiting holes respectively matched with the needle rod and the guide rod.

Preferably, the needle rod pressure lever is connected with a return spring which can realize upward return after the pressure plate is disengaged from the upper stop point.

Preferably, the needle bar pressing assembly further comprises a swinging shaft and a swinging rod rotatably connected to the swinging shaft, and the needle bar pressing rod is driven by the swinging rod.

Preferably, the pressing needle rod assembly further comprises an air cylinder, and the swinging rod is driven to rotate through the extension and contraction of a piston rod of the air cylinder.

Preferably, the swing rod is provided with a rear protrusion protruding rearward, the piston rod is connected with a top plate, and the rear protrusion is connected with a rolling bearing in rolling fit with the top plate.

Preferably, the swinging rod is provided with a swinging head protruding forwards, and the upper end of the needle rod pressing rod is connected with a rolling bearing in rolling fit with the swinging head.

The invention also provides an embroidery machine head which comprises a needle bar driving structure capable of reducing the height of the needle bar during needle raising.

The invention also provides an embroidery machine which comprises the embroidery machine head.

The technical scheme adopted by the invention has the following beneficial effects:

1. when the needle is drawn up, the needle bar assembly pushes the needle bar down to make the lower dead point correspond to the clamping groove height, the needle bar driving block can rotate to make the lower dead point embed into the driving block clamping groove, and the needle bar can follow the needle bar driver and do the up-and-down motion.

2. Because top dead center and bottom dead center are the same, are linked firmly by screw locking with the needle bar, so press down the top dead center, can push down the needle bar, therefore with the help of the inherent top dead center on the current needle bar, adopt the mode that the clamp plate pressed down the top dead center to down press the needle bar, need not to set up down the fulcrum in addition on the needle bar.

3. Two spacing holes on the pressing plate are respectively matched with the needle rod and the guide rod, so that the needle rod pressing rod is prevented from rotating.

4. The swinging rod is stressed to rotate around the swinging shaft, so that the needle rod pressure rod is pressed downwards, and the needle rod pressure rod pushes the upper stop point downwards after descending until the lower stop point on the needle rod is embedded into the clamping groove of the driving block. After the pressing action is finished, the needle rod pressing rod is reset upwards through the reset spring after the pressing plate is disengaged from the upper stop point, and then the needle rod can work normally. The needle rod pressure lever can lift the swing rod to rotate and reset, so that the swing rod can be driven to rotate around the swing shaft through simple horizontal linear extension.

5. The piston rod of the cylinder stretches out and draws back to drive the swinging rod to rotate, and a complex transmission structure is not needed.

6. The swing rod is convenient to act with the cylinder and the needle rod pressure rod through the arrangement of the rear protruding part and the swing head, rolling contact is realized between the swing rod and the top plate and between the swing rod and the needle rod pressure rod through the rolling bearings, friction force is small, transmission is smooth, and noise is small.

The following detailed description of the present invention will be provided in conjunction with the accompanying drawings.

Drawings

The invention is further described with reference to the accompanying drawings and the detailed description below:

fig. 1 is a schematic view of a conventional embroidering machine in a stopped state;

FIG. 2 is a partial structural view of an embroidering machine of the present invention;

FIG. 3 is a schematic view showing a needle bar driving apparatus of the embroidery machine according to the present invention mounted on a needle bar frame;

FIG. 4 is a schematic view of the construction of the needle bar assembly of the present invention;

FIG. 5 is a schematic view of the engagement structure of the needle bar driver and the needle bar according to the present invention;

FIG. 6 is a first structural schematic diagram of the thread hooking device of the embroidery machine of the invention;

FIG. 7 is a second structural view of the thread hooking device of the embroidery machine of the present invention;

in the figure: 100-needle bar holder assembly; 101-needle bar frame upper beam; 1-needle bar drive means; 11-needle bar compression bar; 111-a platen; 1111-a guide hole; 112-upper rolling bearing; 12-a swing lever; 121-a swing head; 122-rear rolling bearing; 13-a cylinder; 131-a top plate; 14-a needle bar; 141-bottom dead center; 142-top dead center; 15-needle bar drive; 151-needle bar drive block; 1511-card slot; 16-a swing shaft; 200-a handpiece housing assembly; 2-a thread hooking device; 21-a wire hooking device; 211-bending the plate; 22-a lifter; 23-connecting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "front," "back," "up," "down," and the like, which indicate orientation or positional relationship, are based only on the orientation or positional relationship shown in the drawings and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation and, therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.

Referring to fig. 1 to 7, the embroidery machine includes an embroidery machine head, wherein the embroidery machine head includes a head housing assembly 200 and a needle bar frame assembly 100, the head housing assembly 200 includes a head housing, a cam link mechanism, etc., a thread hooking device 2 is installed on the head housing, the thread hooking device 2 includes a thread hooking device 21, the needle bar frame assembly 100 includes a needle bar frame, and a needle bar driving device 1 is installed on the needle bar frame. Reference may be made in particular to the prior art.

For leather and other thick cloth (leather), in order to change the leather, the height requirement from the lower end of the machine shell to the needle plate surface is higher than that of a common embroidery machine, so that the position of the shuttle box body in the height direction can be reduced. Meanwhile, in order to compensate for the reduction of the height position of the shuttle box body, the smooth embroidery is ensured by lengthening the needle rod. The needle bar is behind the extension, and the high position of bottom dead center can promote during the parking state, even if the needle bar driver moves when the highest position during consequently the rise of the needle, its draw-in groove still can not bump lower dead center. Therefore, the needle bar driving device of the embroidery machine can press the needle bar downwards during needle raising, so that the lower dead point on the needle bar is embedded into the clamping groove of the driving block.

Referring to fig. 2 to 5, the needle bar driving device 1 of the embroidery machine includes a needle bar 14 having an upper dead point 142 and a lower dead point 141, a needle bar driver 15 driving the needle bar 14 to move, the needle bar driver 15 including a needle bar driving block 151, the needle bar driving block 151 being provided with a catching groove 1511 cooperating with the lower dead point 141.

In order to press the needle bar 14 downward at the time of raising, the embroidery machine needle bar driving device 1 further includes a needle bar assembly which presses the needle bar 14 downward at the time of raising so that the lower dead point 141 corresponds to the height of the catching groove 1511. When the needle is drawn up, the needle bar 14 is pressed downwards by the needle bar pressing component, so that the lower dead point 141 corresponds to the height of the clamping groove 1511, the needle bar driving block 151 can rotate to enable the lower dead point 141 to be embedded into the driving block clamping groove 1511, and the needle bar 14 can move up and down along with the needle bar driver 15.

In this embodiment, the needle bar pressing assembly includes a needle bar pressing rod 11 for pressing down the top dead center 142 and a driving member for driving the needle bar pressing rod 11 to move, and the upper cross beam 101 of the needle bar frame is provided with a guide hole matched with the needle bar pressing rod 11 for guiding the needle bar pressing rod 11 to move linearly up and down.

In order to perform a pressing action with the upper stop point 142, a pressing plate 111 which is pressed with the upper stop point 142 is arranged at the bottom of the needle rod pressing rod 11, and two limiting holes 1111 are arranged on the pressing plate 111 and are respectively matched with the needle rod 14 and the guide rod (the guide rod is arranged side by side with the needle rod), so that the needle rod pressing rod 11 is prevented from rotating. By means of the upper dead point 142 inherent on the existing needle bar, the needle bar 14 is pressed downwards in a mode that the pressing plate 111 presses the upper dead point 142, and a pressing fulcrum is not required to be additionally arranged on the needle bar.

In addition, the needle bar pressing rod 11 is connected with a return spring which can realize upward return after the pressing plate is disengaged from the upper stop point 142. The needle bar pressing assembly further comprises a swinging shaft 16 and a swinging rod 12 rotatably connected to the swinging shaft 16, and the needle bar pressing rod 11 is driven by the swinging rod 12. The swing lever 12 is forced to rotate around the swing shaft 16, so that the needle bar pressing lever 11 is pressed downwards, the needle bar pressing lever 11 pushes the upper dead point 142 downwards after descending, and the lower dead point 141 on the needle bar is embedded into the clamping groove 1511 of the driving block. After the pressing action is completed, the needle bar pressing rod 11 is reset upwards through the reset spring after the pressing plate 111 is disengaged from the upper stop point 142, and then the needle bar 14 can work normally. The needle rod pressing rod 11 can lift the swing rod 12 to rotate and reset, so that the swing rod can be driven to rotate around the swing shaft through simple horizontal linear extension.

The pressing needle rod assembly further comprises an air cylinder 13, and the swinging rod 12 is driven to rotate through the extension and contraction of a piston rod of the air cylinder 13. No complex transmission structure is required.

The swing lever 12 is provided with a rear projection projecting rearward, to which a rear rolling bearing 122 is attached. The swing lever 12 is provided with a swing head 121 projecting forward. The upper end of the needle rod pressing rod 11 is connected with an upper rolling bearing 112, and the swinging head 121 is provided with an arc surface matched with the rolling bearing. The rolling contact is realized by adopting the rolling bearing, the friction force is smaller, the transmission is smoother, and the noise is smaller.

In addition, when the shuttle box body is lowered, the conventional thread hooking device cannot complete thread hooking, so that the height position of the thread hooking device needs to be lowered. Referring to fig. 6 and 7, the embroidery machine thread hooking device 2 adopted by the invention comprises a thread hooking device 21 mounted on a machine head shell, wherein a lifter 22 is further mounted on the machine head shell, when thread hooking is required, the lifter 22 drives the thread hooking device 21 to descend from an initial height to a thread hooking position, and after thread hooking is finished, the lifter 22 drives the thread hooking device 21 to ascend to the initial height. Therefore, the problem that the conventional thread hooking device cannot complete thread hooking after the height of the shuttle box body is reduced is solved.

In this embodiment, the lifter 22 is a cylinder installed vertically with the piston rod facing downward. Moreover, for convenience of installation, the air cylinder is installed on the side surface of the machine head shell. The piston ejector rod is connected with a connecting plate 23 through a top plate at the end part, the thread hooking device 21 comprises a thread hooking bottom plate, the thread hooking bottom plate is provided with a side bending plate 211, and the side bending plate is connected with the connecting plate through screws.

Of course, it will be understood by those skilled in the art that a linear motor or the like could be used in place of the air cylinder.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.