Sewing machine and active cloth dragging wheel structure thereof

Abstract

The utility model provides a sewing machine and its active cloth dragging wheel structure, including upper cloth dragging wheel, lower cloth dragging wheel and main shaft rotatablely connected on the machine head, the upper cloth dragging wheel corresponds to the lower cloth dragging wheel, its characterized in that: the lower cloth dragging wheel is fixedly connected with a connecting shaft, between the main shaft and the connecting shaft there is provided a swing assembly, the swing assembly is connected with the main shaft through the connecting shaft. The swing assembly drives the connecting shaft to rotate unidirectionally through the one-way rotating assembly, so that the lower cloth dragging wheel can rotate actively to achieve the purpose that the cloth dragging process is more stable.

Description

Technical Field

[0001] The utility model relates to sewing equipment, in particular to a sewing machine and an active cloth-mopping wheel structure thereof. Background Art

[0002] Sewing machines are very common textile machines.

[0003] At present, a Chinese patent with the authorization announcement number CN219603861U discloses a sewing machine. The sewing machine in the utility model includes a head assembly, a pressure rod assembly and a mounting portion, wherein the head assembly includes a housing; the pressure rod assembly is arranged on the mounting portion, and the mounting portion is detachably connected to the housing. By detachably arranging the mounting portion on the housing of the head assembly, when the flatbed head needs to press the sewing materials and / or templates in special use scenarios, the auxiliary presser foot mechanism can be quickly installed on the flatbed head, which solves the problem that the presser foot mechanism of the sewing machine in the prior art is not easy to install and disassemble when in use.

[0004] However, in order to facilitate dragging the cloth, an upper mop wheel and a lower mop wheel are usually installed on the head assembly, and the upper mop wheel drives the lower mop wheel to rotate, that is, the lower mop wheel rotates in a driven manner, and the upper mop wheel rotates in an active manner. The upper mop wheel and the lower mop wheel cooperate to drag the cloth, but when the lower mop wheel rotates in a driven manner, the stability is poor and the mopping is not smooth during the mopping process. Utility Model Content

[0005] In view of this, the utility model aims to provide a sewing machine and an active mopping wheel structure thereof, which can achieve the purpose of stable and smooth mopping by making the lower mopping wheel actively rotate in one direction.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: an active mop wheel structure, including an upper mop wheel, a lower mop wheel and a main shaft rotatably connected to the machine head, the upper mop wheel corresponds to the lower mop wheel, the lower mop wheel is fixedly connected to a connecting shaft, a swing assembly is arranged between the main shaft and the connecting shaft, and the swing assembly drives the connecting shaft to rotate in one direction through a unidirectional rotating assembly.

[0007] To implement the above technical solution, the upper mop wheel actively rotates, the main shaft located in the machine head actively rotates, the main shaft drives the swing assembly to swing back and forth, the swing assembly drives the connecting shaft to rotate unidirectionally through the unidirectional rotating assembly, and the connecting shaft drives the lower mop wheel to rotate, thereby causing the lower mop wheel to actively rotate. When both the upper mop wheel and the lower mop wheel actively rotate, the dragging process of the cloth is more stable and smooth, and the cloth is less likely to wrinkle.

[0008] As a preferred solution of the utility model, the swing assembly includes a fixed plate, a connecting plate and a swinging plate, the fixed plate is fixed on the main shaft and is eccentrically arranged with the main shaft, the connecting plate is sleeved on the outside of the fixed plate and is rotatably connected to the fixed plate, the swinging plate is rotatably connected to the connecting shaft, and the swinging plate and the connecting plate are hinged.

[0009] To implement the above technical solution, when the main shaft rotates, the main shaft drives the fixed disk to rotate, and through the eccentric setting between the fixed disk and the main shaft, the connecting plate can swing back and forth along the axis of the connecting shaft, and then the swing plate can swing back and forth along the axis of the connecting shaft.

[0010] As a preferred solution of the utility model, the one-way rotating assembly includes a fixed ring, a support block, an elastic member, a friction column and a friction sleeve. The fixed ring is fixed on the swing plate and rotatably connected to the connecting shaft. Multiple support blocks are fixed on the outer wall of the fixed ring. One end of the elastic member is fixedly connected to the support block, and the other end of the elastic member is in contact with the friction column. The friction column is placed between the fixed ring and the support block. The friction sleeve is fixedly connected to the connecting shaft and is sleeved on the outside of the fixed support block. A clamping area for clamping the friction column is formed between the inner wall of the friction sleeve and the support block.

[0011] To implement the above technical solution, during the forward rotation of the connecting plate, the fixed ring and the support block rotate synchronously with the connecting plate, and the friction column moves toward the clamping area through the elastic force of the elastic member. Due to the friction force of the friction column, the friction sleeve and the support block rotate synchronously, and the lower mop wheel rotates; when the connecting plate rotates in the reverse direction, the fixed ring and the support block rotate synchronously with the connecting plate, and due to the resistance of the friction sleeve, the friction column moves toward the elastic member, compressing the elastic member, and then the friction sleeve cannot rotate synchronously with the support block, that is, the lower mop wheel does not rotate, thereby realizing the intermittent unidirectional rotation state of the lower mop wheel.

[0012] As a preferred solution of the utility model, each of the support blocks is connected with at least two elastic members that abut against the friction columns.

[0013] By implementing the above technical solution, the friction column can be more evenly stressed, the friction column can move more smoothly, and the friction column is not easily stuck in the clamping area.

[0014] As a preferred solution of the utility model, one end of the elastic member away from the support block is fixedly connected with a push plate, the outer diameter of the push plate is larger than the outer diameter of the elastic member, and the push plate is used to abut against the outer wall of the friction column.

[0015] The above technical solution is implemented to make the friction column more evenly stressed.

[0016] As a preferred solution of the utility model, a guiding and anti-slipping component is provided between the swing plate and the connecting plate.

[0017] By implementing the above technical solution, the movement of the connecting plate is made more stable during the process in which the swing plate drives the connecting plate to swing back and forth.

[0018] As a preferred solution of the utility model, the guide anti-slip assembly includes a pin shaft, a guide block, a guide groove and a guide ring, the pin shaft passes through the swing plate and the connecting plate, the guide block is fixed to one end of the pin shaft and abuts against the outer wall of the connecting plate, the guide groove is opened at the end of the pin shaft away from the guide block, and the guide ring is embedded in the guide groove and abuts against the outer wall of the abutment plate.

[0019] By implementing the above technical solution, the conduction between the connecting plate and the swing plate can be made more stable through the guiding effect of the guide ring and the guide block.

[0020] As a preferred solution of the utility model, the upper mopping wheel is driven by a servo motor.

[0021] Implementing the above technical solution makes the upper mop wheel rotate more smoothly.

[0022] The utility model also provides a sewing machine, which comprises an active cloth-mopping wheel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0024] Figure 2 A schematic diagram showing the position of the friction sleeve;

[0025] Figure 3 A schematic diagram showing the position of the connecting plate;

[0026] Figure 4 for Figure 3 Enlarged view of point A.

[0027] 1. Upper mop wheel; 11. Servo motor; 2. Lower mop wheel; 21. Connecting shaft; 3. Main shaft; 4. Swing assembly; 41. Fixed plate; 42. Connecting plate; 43. Swinging plate; 431. Driving plate; 432. Driving rod; 5. Guide anti-slip assembly; 51. Pin; 52. Guide block; 53. Guide groove; 54. Guide ring; 6. One-way rotating assembly; 61. Fixed ring; 62. Support block; 63. Elastic member; 64. Friction column; 65. Friction sleeve; 7. Push plate. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0029] Embodiment 1: An active mop wheel structure comprises an upper mop wheel 1, a lower mop wheel 2 and a main shaft 3 rotatably connected to a machine head. The main shaft 3, the upper mop wheel 1 and the lower mop wheel 2 are arranged horizontally. The upper mop wheel 1 corresponds to the lower mop wheel 2, and the upper mop wheel 1 and the lower mop wheel 2 are arranged in parallel. The upper mop wheel 1 is driven by a servo motor 11.

[0030] A connecting shaft 21 is fixedly connected to the lower mopping wheel 2, and the connecting shaft 21 is coaxially arranged with the lower mopping wheel 2. A swing assembly 4 is arranged between the main shaft 3 and the connecting shaft 21. The swing assembly 4 includes a fixed disk 41, a connecting plate 42 and a swing plate 43. The fixed disk 41 is in a disc shape and is fixed to the main shaft 3, and the fixed disk 41 is eccentrically arranged with respect to the main shaft 3. The connecting plate 42 is sleeved on the outside of the fixed disk 41 and is rotationally connected with the fixed disk 41.

[0031] The swing plate 43 includes a disc-shaped driving plate 431 and a bar-shaped driving rod 432. The driving plate 431 and the driving rod 432 are integrated. The driving plate 431 is rotatably connected to the connecting shaft 21, and the driving plate 431 and the connecting shaft 21 are coaxially arranged. A guide anti-slip assembly 5 is arranged between the driving rod 432 and the connecting plate 42.

[0032] The guide anti-drop assembly 5 includes a pin 51, a guide block 52, a guide groove 53 and a guide ring 54. The pin 51 passes through the swing plate 43 and the connecting plate 42, and the pin 51 is rotatably connected to the driving rod 432 and the connecting plate 42. The guide block 52 is fixed to one end of the pin 51 and contacts the outer wall of the connecting plate 42. The guide groove 53 is provided at one end of the pin 51 away from the guide block 52, and the guide groove 53 is annular and coaxially arranged with the pin 51. The guide ring 54 is embedded in the guide groove 53 and contacts the outer wall of the swing plate 43. The guide ring 54 is a snap ring.

[0033] Accordingly, during the rotation of the main shaft 3 , the fixed plate 41 rotates along the axis of the main shaft 3 , and the connecting plate 42 can drive the swing plate 43 to swing back and forth along the axis of the connecting shaft 21 .

[0034] The driving disk 431 drives the connecting shaft 21 to rotate in one direction through the one-way rotating assembly 6 .

[0035] The one-way rotating assembly 6 includes a fixing ring 61, a supporting block 62, an elastic member 63, a friction column 64 and a friction sleeve 65. The fixing ring 61 is fixed to the swing plate 43 and is rotatably connected to the connecting shaft 21. The fixing ring 61 and the connecting shaft 21 are coaxially arranged. Three supporting blocks 62 are fixed to the outer wall of the fixing ring 61, and the three supporting blocks 62 are evenly distributed along the axis of the fixing ring 61.

[0036] One end of the elastic member 63 is fixedly connected to the support block 62, and the other end of the elastic member 63 is fixedly connected to a push plate 7. The outer diameter of the push plate 7 is larger than the outer diameter of the elastic member 63. The push plate 7 is used to abut against the friction column 64. Two elastic members 63 are fixedly connected to each support block 62. The elastic member 63 can be a spring or a rubber tube.

[0037] The friction column 64 is disposed between the fixed ring 61 and the support block 62. The friction sleeve 65 is fixedly connected to the connecting shaft 21 and sleeved on the outside of the fixed support block 62. A clamping area for clamping the friction column 64 is formed between the inner wall of the friction sleeve 65 and the support block 62.

[0038] During the positive rotation of the connecting plate 42, the fixing ring 61 and the supporting block 62 rotate synchronously with the connecting plate 42, and the friction column 64 moves toward the clamping area through the elastic force of the elastic member 63. Due to the friction force of the friction column 64, the friction sleeve 65 and the supporting block 62 rotate synchronously, and the lower mopping wheel 2 rotates.

[0039] When the connecting plate 42 rotates in the opposite direction, the fixing ring 61 and the supporting block 62 rotate synchronously with the connecting plate 42. Due to the resistance of the friction sleeve 65, the friction column 64 moves toward the elastic member 63, compressing the elastic member 63, thereby making the friction sleeve 65 unable to rotate synchronously with the supporting block 62, that is, the lower mopping wheel 2 does not rotate, thereby realizing the intermittent unidirectional rotation state of the lower mopping wheel 2.

[0040] Since the upper mopping wheel 1 is driven by the servo motor 11, the upper mopping wheel 1 can rotate synchronously with the lower mopping wheel 2, so that the mopping process is more stable and the cloth is not prone to wrinkles.

[0041] Embodiment 2: A sewing machine, comprising an active mopping wheel structure in Embodiment 1.

[0042] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. An active mopping wheel structure, comprising an upper mopping wheel (1), a lower mopping wheel (2) and a main shaft (3) rotatably connected to a machine head, wherein the upper mopping wheel (1) corresponds to the lower mopping wheel (2), and is characterized in that: The lower mopping wheel (2) is fixedly connected to a connecting shaft (21), a swing assembly (4) is provided between the main shaft (3) and the connecting shaft (21), and the swing assembly (4) drives the connecting shaft (21) to rotate in one direction through a one-way rotating assembly (6).

2. The active mop wheel structure according to claim 1 is characterized in that: The swing assembly (4) comprises a fixed plate (41), a connecting plate (42) and a swing plate (43); the fixed plate (41) is fixed on the main shaft (3) and is eccentrically arranged with respect to the main shaft (3); the connecting plate (42) is sleeved on the outside of the fixed plate (41) and is rotatably connected to the fixed plate (41); the swing plate (43) is rotatably connected to the connecting shaft (21); and the swing plate (43) and the connecting plate (42) are hinged.

3. The active mopping wheel structure according to claim 2 is characterized in that: The one-way rotating assembly (6) comprises a fixed ring (61), a support block (62), an elastic member (63), a friction column (64) and a friction sleeve (65); the fixed ring (61) is fixed on the swing plate (43) and rotatably connected to the connecting shaft (21); a plurality of support blocks (62) are fixed on the outer wall of the fixed ring (61); one end of the elastic member (63) is fixedly connected to the support block (62); the other end of the elastic member (63) contacts the friction column (64); the friction column (64) is disposed between the fixed ring (61) and the support block (62); the friction sleeve (65) is fixedly connected to the connecting shaft (21) and sleeved on the outside of the fixed support block (62); a clamping area for clamping the friction column (64) is formed between the inner wall of the friction sleeve (65) and the support block (62).

4. The active mopping wheel structure according to claim 3 is characterized in that: Each of the support blocks (62) is connected to at least two elastic members (63) that abut against the friction columns (64).

5. The active mopping wheel structure according to claim 4 is characterized in that: One end of the elastic member (63) away from the support block (62) is fixedly connected to a push plate (7), the outer diameter of the push plate (7) is larger than the outer diameter of the elastic member (63), and the push plate (7) is used to abut against the outer wall of the friction column (64).

6. The active mopping wheel structure according to claim 2 is characterized in that: A guide anti-slip assembly (5) is provided between the swing plate (43) and the connecting plate (42).

7. The active mopping wheel structure according to claim 6 is characterized in that: The guide anti-slip assembly (5) comprises a pin shaft (51), a guide block (52), a guide groove (53) and a guide ring (54); the pin shaft (51) passes through the swing plate (43) and the connecting plate (42); the guide block (52) is fixed to one end of the pin shaft (51) and contacts with the outer wall of the connecting plate (42); the guide groove (53) is formed at one end of the pin shaft (51) away from the guide block (52); and the guide ring (54) is embedded in the guide groove (53) and contacts with the outer wall of the contact plate.

8. The active mopping wheel structure according to claim 1 is characterized in that: The upper cloth-mopping wheel (1) is driven by a servo motor (11).

9. A sewing machine, characterized in that: It comprises an active mopping wheel structure as described in any one of claims 1-8.

Images