Cam kit, needle bar driver, needle bar driving mechanism and embroidery machine head

Abstract

A cam kit, a needle bar driver, a needle bar driving mechanism and an embroidery machine head, comprising a needle bar mechanism, a cam kit, a needle bar driver and a needle bar linkage rod assembly, a needle bar reset rod assembly and a thread take-up rod driving rod assembly respectively connected to the cam kit. The needle bar driver is connected to the needle bar linkage rod assembly. The needle bar mechanism is provided with a plurality of embroidery needle bars and a thread take-up rod. The needle bar driver and the needle bar reset rod assembly are respectively adapted to the embroidery needle bar. The embroidery needle bar on the needle bar mechanism is driven up and down by the needle bar driver and the needle bar reset rod assembly. The thread take-up rod driving rod assembly is connected to the thread take-up rod to drive the thread take-up rod to move. The cam kit is used to simultaneously drive a plurality of connecting rods to move, so that the driving structure of the embroidery machine head for driving the embroidery needle bar and the thread take-up rod is centralized, which is convenient for controlling the rotational inertia generated on the power parts of the embroidery machine head, thereby ensuring the stability of the embroidery machine head under high-speed working conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of embroidery machine heads, and in particular relates to a cam kit, a needle bar driver, a needle bar driving mechanism and an embroidery machine head. Background Art

[0002] The head of a computerized embroidery machine is a key component that enables needle bar embroidery, presser foot cloth pressing, knife thread hooking, and thread take-up by the thread take-up rod. Currently, embroidery machines have certain defects due to their outdated structure and lack of innovation. Basically, all heads are driven by the main shaft, and the transmission structure within each head is mainly composed of grooved cams and multiple connecting rods. This structure has problems such as heavy spindle load, high noise, unstable operation, inability to independently control the head, and difficulty in achieving high-speed embroidery (usually a spindle speed of 1200r / min or above is considered high speed). How to improve the existing head structure so that the embroidery machine can ensure the operating accuracy and stability of the internal components of the head when the spindle runs at high speed has been a hot research topic in the industry.

[0003] The invention patent with application number CN202011559118.X discloses an embroidery machine head suitable for high-speed embroidery, comprising a housing and a needle bar frame, the needle bar frame being slidably connected to the housing and being able to slide horizontally, the needle bar frame being provided with a thread take-up rod, a needle bar, a presser foot shaft and a presser foot, the housing being provided with a main shaft, a needle bar drive mechanism for driving the needle bar, a presser foot drive mechanism for driving the presser foot shaft and a thread take-up drive mechanism for driving the thread take-up rod, the housing being further provided with a clutch mechanism, a clutch drive mechanism, an input transmission shaft and an output transmission shaft. The various drive components in the above-mentioned embroidery machine head for driving the needle bar, presser foot and thread take-up rod are relatively dispersed in position, and each drive component needs to be dynamically balanced, resulting in a more complex head structure and a poor balancing effect. During the high-speed operation of the head, the head is still prone to large vibrations, affecting the embroidery accuracy. Summary of the Invention

[0004] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a cam kit, a needle bar driver, a needle bar drive mechanism and an embroidery machine head, which are used to ensure the working stability of the embroidery machine head under high-speed working conditions.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A cam kit includes a kit shaft, a plurality of cams arranged on the kit shaft, and a cam balancer. The cam balancer is adapted to the cam and is used to reduce the rotational inertia generated by the rotation of the cam. The end of the kit shaft is equipped with a kit balancer, which is used to reduce the rotational inertia generated by the rotation of the cam kit.

[0007] As a preferred solution of the present invention, the cam balance member includes a balancing cam and a balancing wheel. The balancing cam is mounted on the sleeve shaft, and the balancing wheel is fixed on the side wall of the cam.

[0008] As a preferred solution of the present invention, the cam includes a thread take-up rod cam, a needle bar eccentric wheel, and a needle bar reset cam. The balancing cam is arranged on one side of the needle bar reset cam. A balancing groove is provided in the needle bar eccentric wheel. The balancing wheel is fixed on the thread take-up rod cam, and a balancing block is provided on the balancing wheel.

[0009] A needle bar drive mechanism includes a needle bar driver for driving the needle bar of an embroidery machine to move up and down, a needle bar linkage rod assembly and the above-mentioned cam kit. One end of the needle bar linkage rod assembly is connected to the cam kit, and the other end is connected to the middle of the needle bar driver.

[0010] As a preferred solution of the present invention, the needle bar driver is provided with two connecting ribs, and an installation gap is formed between adjacent connecting ribs. The installation gap is arranged along the mid-vertical plane of the needle bar driver, and the needle bar connecting rod assembly is rotatably installed in the middle of the installation gap.

[0011] As a preferred solution of the present invention, the needle bar driver includes a needle bar joint and a needle bar slide. The needle bar joint is rotatably mounted on the needle bar slide, and the connecting rib is arranged on the needle bar slide.

[0012] As a preferred solution of the present invention, the needle bar linkage rod assembly includes a swinging member and a tie rod. The swinging member is connected to the cam kit, and the swinging member is driven to swing by the cam kit. The swinging member is connected to the needle bar driver through the tie rod, and the tie rod is arranged toward the moving direction of the needle bar driver.

[0013] An embroidery machine head includes a needle bar mechanism, the above-mentioned needle bar driving mechanism, and a needle bar reset rod group and a thread take-up rod driving rod group connected to a cam kit. The needle bar mechanism is provided with a plurality of embroidery needle bars and thread take-up rods. The needle bar driver and the needle bar reset rod group are respectively adapted to the embroidery needle bars to drive the embroidery needle bars to move. The thread take-up rod driving rod group is connected to the thread take-up rod to drive the thread take-up rod to move.

[0014] As a preferred solution of the present invention, the embroidery needle bar includes a needle bar body, a presser foot and a connector, the connector is fixedly mounted on the needle bar body, the needle bar driver is detachably connected to the connector, and the presser foot is slidably mounted on the needle bar body.

[0015] As a preferred solution of the present invention, a presser foot connecting block for installing the presser foot is slidably installed on the needle bar body, a support spring is provided between the presser foot connecting block and the connector, and the needle bar reset rod group is adapted to the presser foot connecting block.

[0016] The beneficial effects of the present invention are as follows: (1) the cam kit drives multiple connecting rods to move at the same time, so that the driving structure of the embroidery machine head for driving the embroidery needle bar and the thread take-up rod is centralized, which is convenient for controlling the rotational inertia generated on the embroidery machine head power parts and ensuring the stability of the embroidery machine head under high-speed working conditions.

[0017] (2) The rotational inertia generated by the cam on the cam kit and the rotational inertia generated by the entire cam kit are balanced by the cam balancer and the kit balancer respectively, so as to ensure the stability of the cam kit during operation, thereby ensuring the stability of the embroidery machine head under high-speed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the embroidery machine head.

[0019] Figure 2 This is a schematic diagram of the structure of the embroidery machine head with part of the shell hidden.

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure after the needle bar mechanism is hidden.

[0021] Figure 4 yes Figure 3 Schematic diagram of the structure after the needle bar driver is hidden.

[0022] Figure 5 It is a structural diagram of the cam kit.

[0023] Figure 6 It is a structural diagram of the needle bar driver.

[0024] Figure 7 It is a structural diagram of the needle bar mechanism.

[0025] Figure 8 It is a structural diagram of an embroidery needle bar.

[0026] Figure markings: cam kit 7, kit shaft 7-1, kit balancer 7-2, balance cam 7-3, balance wheel 7-4, thread take-up lever cam 7-5, needle bar eccentric 7-6, needle bar reset cam 7-7, balance groove 7-8, balance block 7-9, flange 7-10, needle bar driver 8, connecting rib 8-1, installation gap 8-2, needle bar joint 8-3, needle bar slide 8-4, guide rod 8-5, upper end clamp 8-6, lower end clamp 8-7, needle bar Linking rod assembly 9, tie rod 9-1, swing rod 9-2, eccentric shaft rod 9-3, needle bar reset rod group 10, thread take-up rod driving rod group 11, first thread take-up connecting rod 11-1, second thread take-up connecting rod 11-2, thread take-up shaft 11-3, needle bar mechanism 12, embroidery needle bar 12-1, needle bar body 12-1-1, presser foot 12-1-2, connector 12-1-3, presser foot connecting block 12-1-4, support spring 12-1-5, thread take-up rod 12-2. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] The embroidery machine head comprises a needle bar mechanism 12, a cam kit 7, a needle bar driver 8 and a needle bar linkage rod assembly 9, a needle bar reset rod assembly 10 and a thread take-up rod driving rod assembly 11 respectively connected with the cam kit 7. The needle bar driver 8 is connected with the needle bar linkage rod assembly 9. The needle bar mechanism 12 is provided with a plurality of embroidery needle bars 12-1 and a thread take-up rod 12-2. The needle bar driver 8 and the needle bar reset rod assembly 10 are respectively adapted to the embroidery needle bar 12-1. The embroidery needle bar 12-1 on the needle bar mechanism 12 is driven up and down by the needle bar driver 8 and the needle bar reset rod assembly 10. The thread take-up rod driving rod assembly 11 is connected with the thread take-up rod 12-2 to drive the thread take-up rod 12-2 to move. The cam kit 7 is used to simultaneously drive multiple connecting rods to move, so that the driving structure of the embroidery machine head for driving the embroidery needle bar 12-1 and the thread take-up rod 12-2 is centralized, which is convenient for controlling the rotational inertia generated on the power parts of the embroidery machine head and ensuring the stability of the embroidery machine head under high-speed working state.

[0029] The cam assembly 7 includes a assembly shaft 7-1, multiple cams mounted on the assembly shaft 7-1, and a cam balancer. The cam balancer is adapted to the cams, i.e., it is mounted on one side of the corresponding cam and serves to reduce the moment of inertia generated by the cam's rotation. A assembly balancer 7-2 is mounted on the end of the assembly shaft 7-1 to reduce the moment of inertia generated by the cam assembly's rotation. The cam balancer and the assembly balancer 7-2 respectively balance the moment of inertia generated by the cams on the cam assembly 7 and the entire cam assembly 7, ensuring the stability of the cam assembly 7 during operation and, consequently, the stability of the embroidery machine head at high speeds. The assembly balancer 7-2 is cam-shaped and includes a balancing cam 7-3 and a balancing wheel 7-4. The balancing cam 7-3 is mounted on the assembly shaft 7-1, and the balancing wheel 7-4 is fixed to the side wall of the cam. By balancing the moment of inertia generated by the cams with these two types of cam balancers, the overall size of the cam assembly 7 can be reduced, thereby reducing the size of the embroidery machine head.

[0030] The cams mounted on the kit shaft 7-1 include a thread take-up lever cam 7-5, a needle bar eccentric 7-6, and a needle bar reset cam 7-7. A balancing cam 7-3 is positioned on one side of the needle bar reset cam 7-7. The needle bar reset cam 7-7 is connected to the needle bar reset lever assembly 10. A balancing groove 7-8 is provided within the needle bar eccentric 7-6 to reduce the rotational inertia of the needle bar eccentric 7-6. The needle bar eccentric 7-6 is connected to the needle bar driver 8 via a needle bar linkage lever assembly 9. A balancing wheel 7-4 is fixed to the thread take-up lever cam 7-5. A thread take-up lever assembly 11 is connected to the thread take-up lever cam 7-5. A balancing weight 7-9 is provided on the balancing wheel 7-4. In this embodiment, both the thread take-up lever cam 7-5 and the needle bar reset cam 7-7 are track cams.

[0031] A flange 7-10 is installed on the kit shaft 7-1, and the kit shaft 7-1 is installed on the housing of the embroidery machine head through the flange 7-10, as a means to further reduce the overall rotational inertia of the cam kit 7. The kit balancer 7-2 is located on one side of the flange 7-10, and the cam and the cam balancer are located on the other side of the flange 7-10.

[0032] The needle bar driver 8 includes a guide rod 8-5, a needle bar joint 8-3 and a needle bar slide 8-4. The guide rod 8-5 is fixedly connected to the housing of the embroidery machine head, and the needle bar slide 8-4 is slidably installed on the guide rod 8-5. The needle bar slide 8-4 is a sliding sleeve structure. Two connecting ribs 8-1 are provided on the outside of the needle bar slide 8-4. An installation gap 8-2 is formed between adjacent connecting ribs 8-1. The installation gap 8-2 is arranged along the median vertical plane of the needle bar driver 8, and the needle bar linkage rod assembly 9 is rotatably installed in the middle of the installation gap 8-2; the needle bar joint 8-3 is rotatably sleeved on the outside of the needle bar slide 8-4, and a torsion spring is provided between the needle cutting bar joint 8-3 and the needle bar slide 8-4, so that after the needle bar joint 8-3 is twisted by external force, when the external force is removed, the needle bar joint 8-3 is reset.

[0033] The installation gap 8-2 is arranged on the mid-vertical plane of the needle bar driver 8, and the needle bar linkage rod assembly 9 is connected to the middle of the installation gap 8-2, ensuring that the force applied by the needle bar linkage rod assembly 9 to the needle bar driver 8 acts on the center position of the needle bar slide 8-4, thereby ensuring that the force applied to the needle bar driver 8 is located in the middle of the needle bar driver 8, reducing the wear of the needle bar driver 8 during use.

[0034] The needle bar joint 8-3 is provided with an upper end clamp 8-6 and a lower end clamp 8-7. By rotating the needle bar joint 8-3, the connecting head 12-1-3 of the embroidery needle bar 12-1 is clamped between the upper end clamp 8-6 and the lower end clamp 8-7, thereby driving the embroidery needle bar 12-1 to move up and down through the needle bar driver 8.

[0035] The needle bar linkage assembly 9 includes a swinging member and a tie rod 9-1. The swinging member is connected to the needle bar driver 8 via the tie rod 9-1. The tie rod 9-1 is arranged in the direction of movement of the needle bar driver 8. During the operation of the needle bar linkage assembly 9, the tie rod 9-1 can produce a certain swing perpendicular to the direction of movement of the needle bar driver 8. The arrangement of the tie rod 9-1 facilitates the stability of the needle bar linkage assembly 9 in driving the needle bar driver 8 to move. The swinging member includes a swing rod 9-2 and an eccentric shaft 9-3. One end of the swing rod 9-2 is rotatably mounted on the housing of the embroidery machine head, and the other end is rotatably connected to the tie rod 9-1. The eccentric shaft 9-3 is sleeved on the outside of the needle bar eccentric wheel 7-6, and the other end of the eccentric shaft 9-3 is rotatably connected to the middle part of the swing rod 9-2. The swing rod 9-2 is driven to swing through the needle bar eccentric wheel 7-6, thereby driving the needle bar driver 8 to move up and down.

[0036] The needle bar reset rod group 10 includes a first V-shaped rod, a second V-shaped rod and a reset connecting rod. The middle parts of the first V-shaped rod and the second V-shaped rod are rotatably connected to the embroidery machine head through a rotating shaft. The first V-shaped rod is connected to the needle bar reset cam 7-7, and the second V-shaped rod is connected to the first V-shaped rod through the reset connecting rod, and the end of the second V-shaped rod is arranged below the lower end clamp 8-7. When the embroidery needle bar 12-1 is embroidered downward, the needle bar reset cam 7-7 drives the first V-shaped rod to swing, which drives the second V-shaped rod to swing, thereby lifting and resetting the embroidery needle bar 12-1 through the second V-shaped rod.

[0037] The thread take-up lever driving rod group 11 includes a thread take-up shaft 11-3 and a first thread take-up link 11-1 and a second thread take-up link 11-2 fixedly connected to the thread take-up shaft 11-3. The first thread take-up link 11-1 is connected to the thread take-up lever cam 7-5, and the second thread take-up link 11-2 is in contact with the thread take-up lever 12-2. The thread take-up shaft 11-3 is connected to the embroidery machine head housing. The thread take-up lever cam 7-5 rotates, driving the first thread take-up link 11-1 to swing, thereby driving the thread take-up shaft 11-3 to rotate, and the second thread take-up link 11-2 swings as the thread take-up shaft 11-3 rotates, thereby driving the thread take-up lever 12-2 to move up and down.

[0038] The cam kit 7, the needle bar driver 8, and the needle bar linkage rod assembly 9 are connected to form a needle bar driving mechanism for driving the needle bar body 12-1-1 to move downward to embroider the cloth.

[0039] The embroidery needle bar 12-1 includes a needle bar body 12-1-1, a presser foot 12-1-2 and a connector 12-1-3. The connector 12-1-3 is fixedly mounted on the needle bar body 12-1-1. The needle bar driver 8 is detachably connected to the connector 12-1-3. The presser foot 12-1-2 is slidably mounted on the needle bar body 12-1-1. A presser foot connecting block for mounting the presser foot 12-1-2 is slidably mounted on the needle bar body 12-1-1. 12-1-4, a support spring 12-1-5 is provided between the presser foot connecting block 12-1-4 and the connector 12-1-3, and the needle bar reset rod group 10 is adapted to the presser foot connecting block 12-1-4, that is, the second V-shaped rod is arranged below the presser foot connecting block 12-1-4. During the reset process, the second V-shaped rod is against the lower end of the presser foot connecting block 12-1-4, thereby lifting the embroidery needle bar 12-1 through the presser foot connecting block 12-1-4.

[0040] When the needle bar driver 8 drives the embroidery needle bar 12-1 downward, the needle bar body 12-1-1 and the presser foot 12-1-2 move downward at the same time. When the presser foot 12-1-2 is against the cloth, the needle bar driver 8 overcomes the elastic force of the support spring 12-1-5 and continues to drive the needle bar body 12-1-1 downward, so that the needle bar body 12-1-1 embroiders the cloth.

[0041] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is to be embodied in the widest possible manner consistent with the principles and novel features disclosed herein.

[0042] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A needle bar drive mechanism, characterized in that: It comprises a needle bar linkage rod assembly (9), a needle bar driver (8) and a cam kit (7); The needle bar linkage rod assembly (9) comprises a swinging member and a tie rod (9-1), wherein the swinging member is connected to the needle bar driver (8) via the tie rod (9-1), and the tie rod (9-1) is arranged in the moving direction of the needle bar driver (8), and the swinging member comprises a swinging rod (9-2) and an eccentric shaft rod (9-3), wherein one end of the swinging rod (9-2) is rotatably mounted on the housing of the embroidery machine head, and the other end is rotatably connected to the tie rod (9-1), and the eccentric shaft rod (9-3) is sleeved on the outer side of the needle bar eccentric wheel (7-6), and the other end of the eccentric shaft rod (9-3) is rotatably connected to the middle part of the swinging rod (9-2), and the swinging rod (9-2) is driven to swing via the needle bar eccentric wheel (7-6), thereby driving the needle bar driver (8) to move up and down; The needle bar driver (8) comprises a guide bar (8-5), a needle bar joint (8-3) and a needle bar slide (8-4), wherein the guide bar (8-5) is fixedly connected to the housing of the embroidery machine head, and the needle bar slide (8-4) is slidably mounted on the guide bar (8-5). The needle bar slide (8-4) is a sliding sleeve structure, and two connecting ribs (8-1) are provided on the outer side of the needle bar slide (8-4), and an installation gap (8-1) is formed between adjacent connecting ribs (8-1). -2), the installation gap (8-2) is arranged along the middle vertical plane of the needle bar driver (8), and the needle bar linkage rod assembly (9) is rotatably installed in the middle of the installation gap (8-2); the needle bar joint (8-3) is rotatably sleeved on the outside of the needle bar slide (8-4), and a torsion spring is provided between the needle bar joint (8-3) and the needle bar slide (8-4), so that after the needle bar joint (8-3) is twisted by an external force, when the external force is removed, the needle bar joint (8-3) is reset; A cam kit comprises a kit shaft (7-1), a plurality of cams arranged on the kit shaft (7-1), and a cam balancing member. The cam balancing member is adapted to the cam and is used to reduce the moment of inertia generated by the rotation of the cam. A kit balancing member (7-2) is installed at the end of the kit shaft (7-1). The kit balancing member (7-2) is cam-shaped and is used to reduce the moment of inertia generated by the rotation of the cam kit. The cam balancing member comprises a balancing cam (7-3) and a balancing wheel (7-4). The balancing cam (7-3) is installed on the kit shaft (7-1). The balance wheel (7-4) is fixed on the side wall of the cam; the cam includes a thread take-up lever cam (7-5), a needle bar eccentric wheel (7-6), and a needle bar reset cam (7-7); the balance cam (7-3) is arranged on one side of the needle bar reset cam (7-7); a balance groove (7-8) is provided in the needle bar eccentric wheel (7-6); the balance wheel (7-4) is fixed on the thread take-up lever cam (7-5); and a balance block (7-9) is provided on the balance wheel (7-4); the needle bar eccentric wheel (7-6) and the needle bar driver (8) are connected via a needle bar linkage rod assembly (9).

2. An embroidery machine head, characterized in that: It includes a needle bar mechanism (12), a needle bar driving mechanism according to claim 1, a needle bar reset rod group (10) connected to the needle bar reset cam in the cam kit, and a thread take-up rod driving rod group (11) connected to the thread take-up rod cam in the cam kit. The needle bar mechanism (12) is provided with a plurality of embroidery needle bars (12-1) and thread take-up rods (12-2). The needle bar driver (8) and the needle bar reset rod group (10) are respectively adapted to the embroidery needle bar (12-1) to drive the embroidery needle bar (12-1) to move. The thread take-up rod driving rod group (11) is connected to the thread take-up rod (12-2) to drive the thread take-up rod (12-2) to move.

3. The embroidery machine head according to claim 2, characterized in that: The embroidery needle bar (12-1) comprises a needle bar body (12-1-1), a presser foot (12-1-2) and a connector (12-1-3); the connector (12-1-3) is fixedly mounted on the needle bar body (12-1-1); a needle bar connector of a needle bar driver (8) is detachably connected to the connector (12-1-3); and the presser foot (12-1-2) is slidably mounted on the needle bar body (12-1-1).

4. The embroidery machine head according to claim 3, characterized in that: A presser foot connecting block (12-1-4) for installing a presser foot (12-1-2) is slidably mounted on the needle bar body (12-1-1), a support spring (12-1-5) is provided between the presser foot connecting block (12-1-4) and the connector (12-1-3), and the needle bar reset rod group (10) is adapted to the presser foot connecting block (12-1-4).

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