Transmission mechanism of linking machine

Abstract

The utility model provides a transmission mechanism of a linking machine, which comprises a bracket, a motor arranged on the side surface of the bracket, a transmission shaft hinged on the bracket, the motor driving the transmission shaft to rotate, an eccentric wheel sleeved and fixed on the transmission shaft, a connecting rod sleeved on the eccentric wheel, the eccentric wheel capable of rotating relative to the connecting rod, and a universal joint connected on the connecting rod, a curved needle swing rod is further hinged to the support, a curved needle is fixed to the top of the curved needle swing rod, the curved needle swing rod is fixedly sleeved with a swing rod crank, and the rotating end of the universal joint is fixed to the swing rod crank. According to the transmission mechanism of the linking machine, the eccentric wheel rotates to drive the connecting rod to generate displacement in the longitudinal direction, the curved needle swing rod and the curved needle are driven to rotate and swing for sewing through transmission of the universal joint and the swing rod crank, the transmission structure is simple, the transmission mode is stable, assembly is better, noise in the transmission process is greatly reduced, and working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of sewing machine, and relates to a transmission mechanism of sewing machine. BACKGROUND

[0002] At present, the sewing machine commonly used in the knitting industry, also called the circular disc sewing machine, is one of the important equipment in the wool weaving industry, and is used for sewing knitted garment pieces, collars and cuffs. With the help of the sewing machine, the garment piece sewing work of the sweater can be efficiently and quickly completed, and the efficiency is greatly improved compared with manual sewing. However, with the continuous emergence of new chemical fiber fabrics and the continuous change of people's needs, higher and higher requirements are put forward for the performance of the sewing machine, and the existing various sewing machine structures have gradually shown their drawbacks.

[0003] The existing sewing machine transmission system usually adopts a whole transmission shaft to realize the transmission work, and the main defects are as follows: firstly, the transmission system structure is relatively complicated, and the unreasonable transmission structure design leads to relatively large noise in the high-speed rotating work process, and also makes the working efficiency relatively low; secondly, the balance and stability of the transmission system in the high-speed rotating transmission process are poor, and the transmission efficiency is greatly reduced. SUMMARY

[0004] The utility model discloses a transmission mechanism of sewing machine that transmission mode is stable, transmission efficiency is high aims at the above -mentioned problem in prior art.

[0005] The utility model discloses a transmission mechanism of sewing machine, including the support, the side of support is equipped with motor, the support is hinged with transmission shaft, the motor drives transmission shaft rotation, the transmission shaft is set fixed with eccentric wheel on the sleeve, the eccentric wheel is set with connecting rod on the sleeve, the eccentric wheel can rotate relative to connecting rod, the connecting rod is connected with universal joint, the support is still hinged with the needle swing lever, the top of needle swing lever is fixed with the needle, the needle swing lever is set fixed with swing lever crank on the sleeve, the rotary end of universal joint is fixed with swing lever crank.

[0006] In the transmission mechanism of the sewing machine, the end of the needle swing lever is provided with a counterweight, and the counterweight and the needle are respectively located at the two ends of the needle swing lever.

[0007] In the transmission mechanism of the sewing machine, the output shaft of the motor is fixed with a first transmission wheel on the sleeve, the end of the transmission shaft is fixed with a second transmission wheel on the sleeve, a synchronous belt is arranged between the first transmission wheel and the second transmission wheel, and the motor drives the transmission shaft to rotate through the synchronous belt.

[0008] In the transmission mechanism of the sewing machine, the first transmission wheel and the second transmission wheel are provided with external tooth parts, and the inner circumferential surface of the synchronous belt is provided with internal tooth parts, which are engaged with the external tooth parts.

[0009] In the transmission mechanism of the sewing machine, the connecting rod comprises a first rod segment connected with the universal joint and a second rod segment fixedly connected with the first rod segment through a screw rod, and the first rod segment and the second rod segment are respectively provided with a first circular-arc-shaped clamping groove and a second circular-arc-shaped clamping groove matched with each other, and the first circular-arc-shaped clamping groove and the second circular-arc-shaped clamping groove are clamped to form a first through hole matched with the eccentric wheel.

[0010] In the transmission mechanism of the sewing machine, the support is provided with a clearance, and the swing lever crank is located in the clearance, and a spring is further sleeved on the curved needle swing lever, and the two ends of the spring are respectively in contact with the side surface of the swing lever crank and the inner wall of the clearance.

[0011] Compared with the prior art, in the transmission mechanism of the sewing machine, the eccentric wheel is rotated to drive the connecting rod to displace in the longitudinal direction, and the universal joint and the swing lever crank are driven to rotate to drive the curved needle swing lever and the curved needle to rotate and swing for sewing, the transmission structure is simple, the transmission mode is stable, the assembly is better, the noise in the transmission process is greatly reduced, and the working efficiency is improved; the universal joint is adopted for transmission, the universal joint can ensure stable transmission, and because the rotating end connected with the swing lever crank of the universal joint can rotate relative to the connecting rod, the situation that the transmission is blocked is effectively prevented, the reliability of the transmission is ensured, and the transmission efficiency is improved; the counterweight is arranged to balance the curved needle swing lever and ensure the stable rotation of the curved needle swing lever; the spring is arranged to tightly abut the swing lever crank and the universal joint, so that the universal joint has higher efficiency and better effect when exerting the force on the swing lever crank. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic view of the transmission mechanism of the sewing machine.

[0013] Figure 2 is a schematic view of the transmission mechanism of the sewing machine with the support hidden.

[0014] In the figure, 1 is a support, 2 is a motor, 21 is a first transmission wheel, 3 is a transmission shaft, 31 is a second transmission wheel, 4 is a synchronous belt, 41 is an internal tooth part, 5 is an eccentric wheel, 6 is a connecting rod, 60 is a first through hole, 61 is a first rod segment, 610 is a first circular-arc-shaped clamping groove, 62 is a second rod segment, 620 is a second circular-arc-shaped clamping groove, 7 is a universal joint, 8 is a curved needle swing lever, 81 is a curved needle, 9 is a swing lever crank, 10 is a counterweight, and 11 is a spring. DETAILED DESCRIPTION

[0015] The utility model discloses a specific embodiment as follows and further describes the technical scheme of the utility model in connection with the drawings, but the utility model is not limited to these embodiments.

[0016] As shown in Figure 1 And Figure 2 The transmission mechanism of the present sewing machine, including support 1, the side of support 1 is equipped with motor 2, support 1 is hinged with transmission shaft 3, and motor 2 drives transmission shaft 3 to rotate.Eccentric wheel 5 is sleeved and fixed on transmission shaft 3, connecting rod 6 is sleeved on eccentric wheel 5, and eccentric wheel 5 can rotate relative to connecting rod 6.Connecting rod 6 is connected with universal joint 7.Support 1 is also hinged with bent needle swing lever 8, and the top of bent needle swing lever 8 is fixed with bent needle 81.Bent needle swing lever 8 is sleeved and fixed with swing lever crank 9.The rotating end of universal joint 7 is fixed with swing lever crank 9.

[0017] Motor 2 drives transmission shaft 3 to rotate, eccentric wheel 5 rotates synchronously, connecting rod 6 moves along with the rotation of eccentric wheel 5, the movement of connecting rod 6 includes longitudinal displacement, connecting rod 6 drives universal joint 7 to also produce longitudinal displacement, and the movement of universal joint 7 drives bent needle swing lever 8 to rotate through swing lever crank 9, so as to realize the rotation of bent needle 81.

[0018] In the above technical scheme: the output shaft of motor 2 is sleeved and fixed with first transmission wheel 21, the end of transmission shaft 3 is sleeved and fixed with second transmission wheel 31, and synchronous belt 4 is arranged between first transmission wheel 21 and second transmission wheel 31.Motor 2 drives transmission shaft 3 to rotate through synchronous belt 4.Both first transmission wheel 21 and second transmission wheel 31 are provided with outer tooth portions, and the inner circumferential surface of synchronous belt 4 is provided with inner tooth portion 41, and the inner tooth portion 41 is engaged with the outer tooth portions.

[0019] In the above technical scheme: connecting rod 6 includes first rod section 61 connected with universal joint 7, second rod section 62 fixedly connected on first rod section 61 through screw rod, and first rod section 61 and second rod section 62 are respectively provided with first arc-shaped clamping groove 610 and second arc-shaped clamping groove 620 matched with each other, and the first arc-shaped clamping groove 610 and the second arc-shaped clamping groove 620 are clamped to form first through hole 60 matched with eccentric wheel 5.

[0020] In the above technical scheme: the end of bent needle swing lever 8 is provided with counterweight 10, and counterweight 10 and bent needle 81 are respectively located at both ends of bent needle swing lever 8.Counterweight 10 plays a balancing role on bent needle swing lever 8, so as to ensure the stable rotation of bent needle swing lever 8.

[0021] In the above technical solution: the bracket 1 is provided with a clearance opening, the swing lever crank 9 is located in the clearance opening, the curved needle swing lever 8 is further sleeved with a spring 11, and the two ends of the spring 11 are in contact with the side surface of the swing lever crank 9 and the inner wall of the clearance opening respectively. The elastic force of the spring 11 makes the swing lever crank 9 tightly abut against the universal joint 7, so that the efficiency is higher and the effect is better when the universal joint 7 exerts force on the swing lever crank 9.

[0022] In the transmission mechanism of the sewing machine, the eccentric wheel 5 rotates to drive the connecting rod 6 to displace in the longitudinal direction, and through the transmission of the universal joint 7 and the swing lever crank 9, the curved needle swing lever 8 and the curved needle 81 are rotated and swung to perform sewing. The transmission structure is simple, the transmission mode is stable, the assembly is better, the noise in the transmission process is greatly reduced, and the working efficiency is improved. The universal joint 7 is adopted for transmission, the universal joint 7 can ensure stable transmission, and because the rotating end connected with the swing lever crank 9 can rotate relative to the connecting rod 6, the jamming in the transmission process is effectively prevented, the reliability of the transmission is ensured, and the transmission efficiency is improved. The counterweight 10 is arranged to balance the curved needle swing lever 8, so that the rotation of the curved needle swing lever 8 is stable. The elastic force of the spring 11 makes the swing lever crank 9 tightly abut against the universal joint 7, so that the efficiency is higher and the effect is better when the universal joint 7 exerts force on the swing lever crank 9.

[0023] The specific embodiments described in the present text are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0024] Although the terms such as bracket 1, motor 2, first transmission wheel 21, transmission shaft 3, second transmission wheel 31, synchronous belt 4, inner tooth portion 41, eccentric wheel 5, connecting rod 6, first through hole 60, first rod section 61, first circular arc-shaped clamping groove 610, second rod section 62, second circular arc-shaped clamping groove 620, universal joint 7, curved needle swing lever 8, curved needle 81, swing lever crank 9, counterweight 10, and spring 11 are used frequently in the present text, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present application; it is contrary to the spirit of the present application to interpret them as any kind of additional limitation.

[0025] The contents not described in detail in the present specification belong to the prior art known to those skilled in the art. The specific embodiments described in the present text are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A transmission mechanism for a sewing machine, characterized in that... The device includes a bracket (1), a motor (2) is provided on the side of the bracket (1), a drive shaft (3) is hinged on the bracket (1), the motor (2) drives the drive shaft (3) to rotate, an eccentric wheel (5) is fixedly mounted on the drive shaft (3), a connecting rod (6) is mounted on the eccentric wheel (5), the eccentric wheel (5) can rotate relative to the connecting rod (6), a universal joint (7) is connected to the connecting rod (6), a bent needle rocker arm (8) is also hinged on the bracket (1), a bent needle (81) is fixed at the top of the bent needle rocker arm (8), a rocker arm crank (9) is fixedly mounted on the bent needle rocker arm (8), and the rotating end of the universal joint (7) is fixed to the rocker arm crank (9).

2. The transmission mechanism of a sewing machine according to claim 1, characterized in that... The end of the curved needle pendulum (8) is provided with a counterweight (10), and the counterweight (10) and the curved needle (81) are respectively located at both ends of the curved needle pendulum (8).

3. The transmission mechanism of a sewing machine according to claim 1, characterized in that... A first transmission wheel (21) is fixedly mounted on the output shaft of the motor (2), and a second transmission wheel (31) is fixedly mounted on the end of the transmission shaft (3). A synchronous belt (4) is provided between the first transmission wheel (21) and the second transmission wheel (31), and the motor (2) drives the transmission shaft (3) to rotate through the synchronous belt (4).

4. The transmission mechanism of a sewing machine according to claim 3, characterized in that... Both the first transmission wheel (21) and the second transmission wheel (31) are provided with external teeth, and the inner circumferential surface of the synchronous belt (4) is provided with internal teeth (41), which mesh with the external teeth.

5. The transmission mechanism of a sewing machine according to claim 1, characterized in that... The connecting rod (6) includes a first rod segment (61) connected to the universal joint (7) and a second rod segment (62) detachably and fixedly connected to the first rod segment (61) by a screw. The first rod segment (61) and the second rod segment (62) are respectively provided with a first arc-shaped groove (610) and a second arc-shaped groove (620) that cooperate with each other. The first arc-shaped groove (610) and the second arc-shaped groove (620) engage to form a first through hole (60) that cooperates with the eccentric wheel (5).

6. The transmission mechanism of a sewing machine according to claim 1, characterized in that... The bracket (1) has a relief opening, the rocker crank (9) is located inside the relief opening, and the bent needle rocker (8) is also fitted with a spring (11), the two ends of the spring (11) are in contact with the side of the rocker crank (9) and the inner wall of the relief opening respectively.

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