Bidirectionally-driven thread hooking device for embroidery machine

Abstract

A two-way driving thread hooking device for an embroidery machine comprises an embroidery machine girder, more than two embroidery machine heads are installed on one side face of the embroidery machine girder, thread hooking devices are installed on the embroidery machine heads, and the thread hooking devices are driven by pull rods. A bidirectional driving device is arranged between a first embroidery machine head and a second embroidery machine head which are adjacent in the embroidery machine heads, the bidirectional driving device comprises a positioning block connected with a pull rod, and the positioning block is connected with a connecting rod driving device through a guide rail device. According to the utility model, the bidirectional driving device is arranged between the first embroidery machine head and the second embroidery machine head, and the driving pull rod is used for providing active driving force from right to left for the first embroidery machine head and providing active driving force from left to right for the second embroidery machine head, so that the bidirectional active driving force for the whole embroidery machine heads is realized; and the problem of power attenuation caused by traditional one-way driving is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of embroidery machine equipment, in particular to a bidirectionally driven thread hooking device for an embroidery machine. Background Art

[0002] When the embroidery machine is embroidering fabrics, the embroidery thread has certain tension requirements, and the embroidery thread is relatively in a tight state. If the tight embroidery thread is cut, the embroidery thread is very likely to fall out of the embroidery needle hole due to rebound, which requires rethreading. In order to solve the above problem, a Chinese utility model patent (patent number: 200620102269.1) discloses a thread hooking device for a computer embroidery machine. The technical solution adopted is: including a thread hooking device bottom plate, a thread hook, a thread hook driving mechanism, and a pull rod. The thread hook is movably arranged on the thread hook bottom plate, the thread hook is connected to the thread hook driving mechanism, and a movable connecting rod is arranged between the thread hook driving mechanism and the pull rod, and the pull rod drives the connecting rod in a translational manner. When this thread hooking device is working, it only uses the power of the driving mechanism to cause the thread hook to extend to the lower position of the embroidery needle to hook and lift the embroidery thread, so that the embroidery thread has a certain length margin before cutting the thread, and the embroidery thread will not rebound after being cut and fall out of the embroidery needle hole.

[0003] In the above-mentioned prior art, since most of the current computer embroidery machines are multi-head structures, that is, a large number of embroidery machine heads are installed on an embroidery machine beam, and each embroidery machine head is installed with a thread hooking device, that is, a large number of thread hooking devices are driven by a driving device, and the driving device is installed at one end of the pull rod. The movement of the thread hooking device is achieved by controlling the left and right movement of the pull rod. This driving method will cause attenuation of force transmission when the pull rod is long, that is, the driving force at one end of the pull rod is inconsistent with the driving force at the other end, resulting in deviation in the thread hooking action of the thread hooking device. How to solve the problem of force attenuation at both ends of the pull rod in a large number of thread hooking devices is the object of study for technicians in this field. Utility Model Content

[0004] The utility model provides a bidirectionally driven thread hooking device which has a simple structure and small force attenuation at both ends of a pull rod and is suitable for an embroidery machine with multiple machine heads.

[0005] A bidirectionally driven thread hooking device for an embroidery machine comprises an embroidery machine beam, one side of which is mounted with two or more embroidery machine heads, the embroidery machine heads being mounted with thread hooking devices, the thread hooking devices being driven by a pull rod, a bidirectional driving device being mounted between adjacent first and second embroidery machine heads, the bidirectional driving device comprising a positioning block connected to the pull rod, the positioning block being connected to a connecting rod driving device via a guide rail device, the guide rail device driving the positioning block to move left and right, and the connecting rod driving device driving a slider of the guide rail device to move left and right by rotating the connecting rod. The bidirectionally driven thread hooking device for the embroidery machine is installed with a bidirectional driving device between the first embroidery machine head and the second embroidery machine head, and the bidirectional driving device drives the pull rod to realize the thread hooking function of the thread hooking device installed on the first embroidery machine head and the second embroidery machine head. Since the bidirectional driving device is located between the first embroidery machine head and the second embroidery machine head, the force attenuation at both ends of the pull rod is relatively small compared to the traditional single-sided driving structure, and it can be used for a larger number of embroidery machine heads, and can also adapt to a longer distance of the pull rod, avoiding technical failures caused by the attenuation of the driving force. In the utility model, the positioning block is connected to the connecting rod driving device through a guide rail device, and the connecting rod driving device transmits the driving force to the guide rail device, and then the guide rail device drives the pull rod connected to the positioning block to move, and finally realizes the operation of the thread hooking device. This guide rail device as an intermediate medium driving structure greatly improves the driving force relative to the pull rod, and also improves the stability of the pull rod operation.

[0006] The guide rail device includes a guide rail base connected to the embroidery machine beam, the guide rail base is equipped with a horizontally arranged guide rail, the guide rail is connected to the slider, the slider is connected to the adapter block, the adapter block is connected to the pull rod through the hook knife positioning block, the adapter block is provided with a U-shaped groove in the vertical direction of the guide rail, the U-shaped groove is movably connected to the rocker arm through a pin shaft connected by a first ball bearing, and the rocker arm drives the adapter block to move left and right, thereby driving the slider and the pull rod to move left and right.

[0007] The connecting rod driving device includes a motor, which drives the roller to rotate. A second ball is provided on the side of the roller, and the second ball cooperates with the track groove of the connecting rod. After the roller rotates, the second ball moves along the track groove of the connecting rod to achieve the technical purpose of the connecting rod swinging left and right. The connecting rod and the swing rod are connected by a screw rod, and an adjustment groove is provided at the connecting end of the connecting rod and the swing rod, and the adjustment groove cooperates with the connecting screw rod. The swing of the connecting rod left and right achieves the technical purpose of the swing rod swinging left and right, and the adjustment groove structure adjusts the amplitude and accuracy of the swing of the swing rod left and right. The motor is fixedly connected to the embroidery machine beam through the motor mounting plate.

[0008] The thread hooking device comprises a thread hooking base plate connected to the embroidery machine head, the thread hooking base plate is matched with a thread hooking cover plate, a thread hooking rod is arranged between the thread hooking base plate and the thread hooking cover plate, the thread hooking rod is connected to the guide rod, the guide rod is embedded in the thread hooking groove of the thread hooking cover plate and the rocker groove of the rocker arm at the same time, the rocker arm is connected to the moving seat through the pressure pin, and the moving seat is connected to the pull rod through the rotating rod. The pull rod moves left and right to realize the swing of the rocker arm connected to the moving seat, and the rocker arm cooperates with the guide rod and the thread hooking groove through the rocker groove to realize the thread hooking rod to cooperate with the embroidery thread of the embroidery machine head to complete the thread hooking function.

[0009] The positioning block is a U-shaped structure, the two arms of the U-shaped structure are provided with round holes for sleeve connection of the pull rod, the hook knife positioning block is embedded in the middle of the U-shaped structure, and the hook knife positioning block is provided with a round hole for matching connection of the pull rod. The hook knife positioning block is embedded in the middle of the U-shaped structure, which further improves the movement accuracy of the hook knife positioning block driving the pull rod.

[0010] The utility model discloses a bidirectionally driven thread hooking device for an embroidery machine, wherein a bidirectional driving device is installed between a first embroidery machine head and a second embroidery machine head, and an active driving force from right to left is provided to the first embroidery machine head through a driving pull rod, and an active driving force from left to right is provided to the second embroidery machine head, thereby realizing bidirectional active driving force for the entire embroidery machine head and reducing the problem of power attenuation caused by traditional unidirectional driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described below in conjunction with the accompanying drawings:

[0012] Figure 1 It is a three-dimensional structural schematic diagram of a bidirectionally driven thread hooking device for an embroidery machine of the utility model;

[0013] Figure 2 It is a three-dimensional structural diagram of a bidirectionally driven thread hooking device for an embroidery machine after the embroidery machine beam of the utility model is hidden;

[0014] Figure 3 It is a schematic diagram of the installation structure of the guide rail device and the wire hooking device in the utility model. Specific implementation plan

[0015] The following is combined with Figure 1-3 The specific implementation method further explains the technical solution of this patent in detail.

[0016] A bidirectionally driven thread hooking device for an embroidery machine comprises an embroidery machine beam 1, one side of which is mounted two or more embroidery machine heads, the embroidery machine heads being mounted with a thread hooking device, and the thread hooking device being driven by a pull rod 31. A bidirectional driving device is mounted between adjacent first embroidery machine heads 17 and second embroidery machine heads 4 in the embroidery machine heads, the bidirectional driving device comprising a positioning block 32 connected to the pull rod 31, the positioning block 32 being connected to a connecting rod driving device via a guide rail device. The connecting rod driving device comprises a motor 2, the motor 2 driving a roller 11 to rotate, a second ball 13 being provided on the side of the roller 11, the second ball 13 being matched with a track groove 12 connected to a connecting rod 14. The connecting rod driving device drives the slider of the guide rail device to move left and right through the rotation of the connecting rod. In order to improve the connection driving accuracy, the connecting rod 14 is connected to the swing rod 9 via a screw 15, an adjustment groove 10 is provided at the connecting end of the connecting rod 14 and the swing rod 9, and the adjustment groove 10 is matched with the connecting screw 15. The motor 2 is fixedly connected to the embroidery machine beam 1 through the motor mounting plate 3. The positioning block 32 is a U-shaped structure, and the two arms of the U-shaped structure are provided with round holes for sleeve connection of the pull rod 31, and the hook knife positioning block 30 is embedded in the middle of the U-shaped structure, and the hook knife positioning block 30 is provided with a round hole for matching the connection pull rod 31.

[0017] As a preferred structure, the guide rail device includes a guide rail base 5 connected to the embroidery machine beam 1, the guide rail base 5 is installed with a horizontally arranged guide rail 26, the guide rail 26 is connected to the slider 27, the slider 27 is connected to the adapter block 29, the adapter block 29 is connected to the pull rod 31 through the hook knife positioning block 30, and the adapter block 29 is provided with a U-shaped groove 28 in the vertical direction of the guide rail, and the U-shaped groove 28 is movably connected to the swing rod 9 through the pin shaft 16 connected by the first ball 8. The guide rail device drives the positioning block 32 to move left and right.

[0018] As a structurally preferred thread hooking device, it includes a thread hooking base plate 18 connected to the head of the embroidery machine, the thread hooking base plate 18 is matched with a thread hooking cover plate 20, a thread hooking rod 19 is provided between the thread hooking base plate 18 and the thread hooking cover plate 20, the thread hooking rod 19 is connected to a guide rod 23, and the guide rod 23 is embedded in the thread hooking groove 21 of the thread hooking cover plate 20 and the rocker groove 22 of the rocker arm 24 at the same time, the rocker arm 24 is connected to the movable seat 33 through the pressure pin 38, and the movable seat 33 is connected to the pull rod 31 through the rotating rod 25.

[0019] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A bidirectionally driven thread hooking device for an embroidery machine, comprising an embroidery machine beam (1), one side of which is mounted two or more embroidery machine heads, the embroidery machine heads being mounted with thread hooking devices, the thread hooking devices being driven by a pull rod (31), characterized in that: A bidirectional driving device is installed between the adjacent first embroidery machine head (17) and the second embroidery machine head (4) in the embroidery machine head, and the bidirectional driving device includes a positioning block (32) connected to the pull rod (31), the positioning block (32) is connected to the connecting rod driving device through a guide rail device, the guide rail device drives the positioning block (32) to move left and right, and the connecting rod driving device drives the slider of the guide rail device to move left and right through the rotation of the connecting rod.

2. The bidirectionally driven thread hooking device for an embroidery machine according to claim 1, characterized in that: The guide rail device comprises a guide rail base (5) connected to the embroidery machine beam (1), the guide rail base (5) is installed with a horizontally arranged guide rail (26), the guide rail (26) is connected to a slider (27), the slider (27) is connected to a transfer block (29), the transfer block (29) is connected to a pull rod (31) via a hook knife positioning block (30), the transfer block (29) is provided with a U-shaped groove (28) in a vertical direction of the guide rail, and the U-shaped groove (28) is movably connected to a rocker rod (9) via a pin shaft (16) connected to a first ball bearing (8).

3. The bidirectionally driven thread hooking device for an embroidery machine according to claim 1, characterized in that: The connecting rod driving device comprises a motor (2), the motor (2) drives the roller (11) to rotate, a second ball (13) is provided on the side of the roller (11), and the second ball (13) cooperates with the track groove (12) of the connecting rod (14).

4. The bidirectionally driven thread hooking device for an embroidery machine according to claim 3, characterized in that: The connecting rod (14) and the swing rod (9) are connected via a screw rod (15); an adjustment groove (10) is provided at the connecting end of the connecting rod (14) and the swing rod (9); the adjustment groove (10) cooperates with the connecting screw rod (15).

5. The bidirectionally driven thread hooking device for an embroidery machine according to claim 3, characterized in that: The motor (2) is fixedly connected to the embroidery machine beam (1) via a motor mounting plate (3).

6. The bidirectionally driven thread hooking device for an embroidery machine according to claim 1, characterized in that: The thread hooking device comprises a thread hooking base plate (18) connected to the head of the embroidery machine, the thread hooking base plate (18) is matched with a thread hooking cover plate (20), a thread hooking rod (19) is provided between the thread hooking base plate (18) and the thread hooking cover plate (20), the thread hooking rod (19) is connected to a guide rod (23), the guide rod (23) is simultaneously embedded in a thread hooking groove (21) of the thread hooking cover plate (20) and a rocker groove (22) of a rocker arm (24), the rocker arm (24) is connected to a movable seat (33) via a pressure pin (38), and the movable seat (33) is connected to a pull rod (31) via a rotating rod (25).

7. The bidirectionally driven thread hooking device for an embroidery machine according to claim 1, characterized in that: The positioning block (32) is a U-shaped structure. The two arms of the U-shaped structure are provided with round holes for sleeve connection with the pull rod (31). The middle of the U-shaped structure is embedded with the hook knife positioning block (30). The hook knife positioning block (30) is provided with a round hole for matching connection with the pull rod (31).

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