Rear towing wheel structure of multi-needle machine

Abstract

The utility model provides a rear towing wheel structure of a multi-needle machine, and belongs to the technical field of multi-needle machines. The technical problem of the rear towing wheel structure of the existing multi-needle machine is solved. The multi-needle machine comprises a machine head, a lifting column capable of moving up and down is connected to the machine head, the rear towing wheel structure comprises a towing bracket and a cloth dragging gear rotationally connected to the towing bracket, and the rear towing wheel structure is characterized in that the lower end of the lifting column is fixedly connected with a horizontally-arranged strip-shaped adjusting plate, the adjusting plate is hinged to the towing bracket through a horizontally-arranged pin shaft, and the lower end of the lifting column is fixedly connected with the cloth dragging gear. The adjusting plate is provided with a pin shaft, the pin shaft is perpendicular to or approximately perpendicular to the axis of the mop gear, the adjusting plate is in threaded connection with two jacking pieces capable of moving up and down relative to the adjusting plate, the two jacking pieces are located on the two sides of the pin shaft respectively, and the lower end faces of the jacking pieces abut against the towing bracket. The utility model is favorable for guaranteeing the stable operation of the mop gear.

Description

Technical Field

[0001] The utility model belongs to the technical field of multi-needle machines and relates to a rear tug wheel structure of the multi-needle machine. Background Art

[0002] Multi-needle sewing machine, referred to as multi-needle machine, is widely used in decorative sewing. Multi-needle machine with auxiliary devices can realize pleating, ruffles, elastic wrinkles and other functions.

[0003] The patent with authorization announcement number CN218404648U discloses a rear drag mechanism of a multi-needle sewing machine. The multi-needle sewing machine includes a casing and a base. The rear drag mechanism includes a rear tug device arranged on the casing. The rear tug device includes a roller drag rack and an upper mop gear rotatably arranged on the roller drag rack. An auxiliary shaft is rotatably arranged on the base. Auxiliary rollers and a lower mop gear arranged opposite to the upper mop gear are arranged on the auxiliary shaft at intervals. The outer diameter of the auxiliary roller is consistent with the outer diameter of the lower mop gear, and the auxiliary roller is located next to the upper mop gear.

[0004] The above mechanism can drag the cloth for sewing, but it still has some shortcomings: its roller drag frame is directly connected to the upper lifting column. Due to the manufacturing errors of the components themselves and the assembly errors between the components, it is often difficult to ensure the horizontality of the mop gear after assembly, resulting in the mop gear part contacting the cloth and causing wrinkles, affecting the stability of the mop operation. Summary of the invention

[0005] The utility model aims at the above problems existing in the prior art and provides a rear tug wheel structure of a multi-needle machine. The technical problem to be solved by the utility model is: how to ensure the operation stability of the rear tug wheel structure of the multi-needle machine.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A rear tug wheel structure of a multi-needle machine, the multi-needle machine comprises a machine head, a lifting column capable of moving up and down is connected to the machine head, the rear tug wheel structure comprises a carriage and a mop gear rotatably connected to the carriage, and is characterized in that a horizontally arranged strip-shaped adjustment plate is fixedly connected to the lower end of the lifting column, the adjustment plate is hinged to the carriage through a horizontally arranged pin shaft, the pin shaft is perpendicular or approximately perpendicular to the axis of the mop gear, two tightening members capable of moving up and down relative to the adjustment plate are threadedly connected to the adjustment plate, the two tightening members are respectively located on both sides of the pin shaft, and the lower end faces of the tightening members are both against the carriage.

[0008] The lifting column arranged on the head of the machine can drive the rear tugwheel structure to move up and down, and the mop gear can cooperate with the gear below to clamp the cloth when it faces downward. The towing frame is the mounting bracket of the mop gear. The contact and separation of the mop gear and the cloth can be realized when the lifting column moves; by connecting a horizontally arranged strip-shaped adjusting plate to the lower end of the lifting column, the adjusting plate is hingedly matched with the towing frame through a horizontal pin shaft that is perpendicular to the axial direction of the mop gear, and at the same time, the adjusting plates on both sides of the pin shaft are threadedly connected with tightening members that can adjust the upper and lower positions, so that the lower end surface of the tightening member abuts against the towing frame. In this way, when the mop gear needs to be leveled after installation or use for a period of time, the corresponding tightening member can be adjusted to move upward, so that the towing frame can swing around the pin shaft relative to the adjusting plate, and after the mop gear reaches a horizontal state, the two tightening members are adjusted downward to make their lower end surfaces abut against the towing frame, thereby locking the horizontal state of the mop gear, thereby ensuring the stable operation of the mop gear.

[0009] In the rear tug wheel structure of the multi-needle machine, the top surface of the tug frame has a strip groove arranged along the axial direction of the tug gear, the adjustment plate is embedded in the strip groove, a gap is left between the bottom surface of the adjustment plate and the bottom surface of the strip groove, and the lower end surface of the pressing member abuts against the bottom surface of the strip groove. In this way, the adjustment plate makes full use of the space occupied by the tug frame for arrangement, improves the compactness of the space, ensures that the two can be relatively adjusted, and at the same time facilitates the strip groove to provide constraints on the position state of the adjustment plate, improves the stability of the leveling state, and ensures stable operation effect.

[0010] In the rear pulley structure of the multi-needle machine, a horizontally arranged pre-tightening screw is threadedly provided on the carriage, and the inner end of the pre-tightening screw abuts against the adjustment plate in the strip groove along the width direction of the strip groove. In this way, after the relative position of the carriage and the adjustment plate is adjusted, the adjustment plate in the strip groove can be pushed by rotating the pre-tightening screw, thereby eliminating the movable space between the inner wall of the strip groove in the width direction and the adjustment plate during use, and improving the stability of the leveling state.

[0011] In the rear pulley structure of the multi-needle machine, the two tensioning members are respectively located at the two ends of the length direction of the adjustment plate. This reduces the sensitivity of the pre-tensioning member to the change in the tilt of the bracket when the upper and lower positions change, making it easier for operators to make precise adjustments, while also helping to reduce the pressure load on the tensioning member and ensure its service life.

[0012] In the rear puller structure of the multi-needle machine, the lifting column is vertically opposite to the pin shaft, which helps to make the bracket more stable during the up and down movement of the lifting column, avoid displacement of the bracket adjustment position, and ensure stability in use.

[0013] In the rear pulley structure of the multi-needle machine, the jacking member is a stud arranged in the up-down direction, which passes through the adjustment plate and is screwed with the adjustment plate. In this way, the up-down position of the jacking member can be adjusted by rotating the bracket and can be locked when the rotation stops, and the structure is simple and stable.

[0014] In the rear pulley structure of the multi-needle machine, the jacking member is a hexagonal screw, so that the upper end of the jacking member can be hidden in the adjustment plate, which is conducive to improving the compactness of the structure.

[0015] In the rear pulley structure of the multi-needle machine, the bottom of the adjustment plate has a raised portion, the pin shaft passes through the raised portion, the bottom surface of the strip groove has a clearance hole, and the raised portion is located in the clearance hole. In this way, the raised portion can ensure sufficient strength at the pin shaft installation point and improve structural stability, while the clearance hole avoids the raised portion, ensuring that the layout structure is more compact and reasonable.

[0016] In the rear pulley structure of the multi-needle machine, a gap is left between the two ends of the adjustment plate and the inner wall of the strip groove, so as to ensure that there is enough space for movement in the strip groove when the relative angle between the adjustment plate and the pulley is adjusted and changed, and ensure smooth adjustment operation.

[0017] Compared with the prior art, the advantages of the utility model are as follows:

[0018] When the rear tug wheel structure of the multi-needle machine needs to level the mop gear at a later stage, the corresponding tightening member can be adjusted to move upward, so that the drag frame can swing around the pin shaft relative to the adjustment plate. After it is determined that it has reached the horizontal level, the two tightening members are adjusted downward so that their bottoms abut against the drag frame to keep the tilt state of the mop gear stable, thereby achieving later leveling and ensuring stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment.

[0020] Figure 2 It is a three-dimensional schematic diagram of a local structure of the first embodiment of the present invention.

[0021] Figure 3 It is an exploded schematic diagram of a local structure of the first embodiment of the present invention.

[0022] Figure 4 It is a side view schematic diagram of a local structure of this embodiment.

[0023] Figure 5 yes Figure 4 Schematic diagram of the AA section structure.

[0024] Figure 6 yes Figure 4 Schematic diagram of the BB cross-section structure.

[0025] In the figure, 1, machine head; 2, lifting column;

[0026] 3. Drag rack; 31. Strip groove; 32. Make way through hole;

[0027] 4. Mop gear;

[0028] 5. adjusting plate; 51. raised portion;

[0029] 6. Pin; 7. Fastening piece; 8. Pre-tightening screw. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] like Figure 1-6As shown, the multi-needle machine includes a machine head 1, to which is connected a lifting column 2 capable of moving up and down, a rear tug wheel structure including a carriage 2 and a mop gear 4 rotatably connected to the carriage 2, the carriage 2 being a U-shaped bracket, the mop gear 4 being an existing component, a horizontally arranged strip-shaped adjusting plate 5 being fixedly connected at the lower end of the lifting column 2, the adjusting plate 5 being hinged to the carriage 2 through a horizontally arranged pin 6, the pin 6 being perpendicular to the axis of the mop gear 4, two tightening members 7 capable of moving up and down relative to the adjusting plate 5 being threadedly connected to the adjusting plate 5, the two tightening members 7 being respectively located on both sides of the pin 6, and the lower end surfaces of the tightening members 7 both abut against the carriage 2. The lifting column 2 arranged on the head 1 can drive the rear tugwheel structure to move up and down by moving up and down, thereby realizing the contact and separation of the mop gear 4 and the cloth, and the towing frame 2 is the mounting bracket of the mop gear 4; by connecting the horizontally arranged strip-shaped adjusting plate 5 at the lower end of the lifting column 2, the adjusting plate 5 is hingedly matched with the towing frame 2 through the horizontal pin 6 which is perpendicular to the axial direction of the mop gear 4, and at the same time, the adjusting plates 5 on both sides of the pin 6 are respectively provided with tightening members 7 which can adjust the upper and lower positions, so that the bottom of the tightening members 7 abuts against the towing frame 2, so that when it is necessary to adjust the mop gear 4 to a horizontal state, the corresponding tightening members 7 can be adjusted to move upward, so that the towing frame 2 can swing relative to the adjusting plate 5 around the pin 6, and after determining that the mop size 4 is driven to be horizontal, the two tightening members 7 are adjusted to move downward so that their bottoms abut against the towing frame 2, thereby locking the mop gear 4 in a horizontal state, realizing later leveling, and ensuring the stability of operation. Preferably, the top surface of the tow frame 2 has a strip groove 31 arranged along the axial direction of the mop gear 4, and the adjustment plate 5 is embedded in the strip groove 31. There is a gap between the bottom surface of the adjustment plate 5 and the bottom surface of the strip groove 31, and the lower end surface of the top tightening member 7 abuts against the bottom surface of the strip groove 31. In this way, the adjustment plate 5 makes full use of the space occupied by the tow frame 2 for arrangement, improves the compactness of the space, and ensures that the two can be relatively adjusted. At the same time, it is beneficial for the strip groove 31 to provide constraints on the position state of the adjustment plate 5, improves the relative position stability of the tow frame 2 and the adjustment plate 5, and further improves the stability of the horizontal state of the mop gear 4. Two horizontally arranged pre-tightening screws 8 are threaded through the tow frame 2, and the inner ends of the pre-tightening screws 8 abut against the adjustment plate 5 in the strip groove 31 along the width direction of the strip groove 31. In this way, after the relative position of the tow frame 2 and the adjustment plate 5 is adjusted, the adjustment plate 5 in the strip groove 31 can be pushed by rotating the pre-tightening screw 8, thereby eliminating the movable space between the inner wall of the strip groove 31 in the width direction and the adjustment plate 5 during use, and at the same time improving the stability of the horizontal state of the mop gear 4 to stabilize the operation. The two jacking members 7 are respectively located at the two ends of the length direction of the adjustment plate 5. This reduces the sensitivity of the pre-tightening member to the change in the inclination of the bracket when the upper and lower positions change, which is convenient for the operator to achieve precise adjustment, and is also conducive to reducing the pressure load on the jacking member 7 to ensure the service life. The lifting column 2 is vertically opposite to the pin 6. This helps to make the bracket more stable in the process of the lifting column 2 moving up and down, avoid displacement of the adjusted position of the tow frame 2, and ensure stability in use.Specifically, the top member 7 is a hexagonal stud arranged in the up and down direction, and the top member 7 passes through the adjustment plate 5 and is screwed with the adjustment plate 5. In this way, the up and down position of the top member 7 can be adjusted by rotating the bracket and can be locked when the rotation stops, and the structure is simple and stable.

[0032] like Figure 3 , Figure 5 As shown, the bottom of the adjustment plate 5 has a protrusion 51, the pin shaft 6 passes through the protrusion 51, the bottom surface of the strip groove 31 has a clearance hole 32, and the protrusion 51 is located in the clearance hole 32. In this way, the protrusion 51 can ensure sufficient strength at the installation of the pin shaft 6 and improve the structural stability, while the clearance hole 32 avoids the protrusion 51, ensuring that the layout structure is more compact and reasonable. There is a gap between the two ends of the adjustment plate 5 and the inner wall of the strip groove 31. In this way, it is ensured that there is enough space for movement in the strip groove 31 when the adjustment plate 5 and the trailer 2 are relatively adjusted, ensuring smooth adjustment operation.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A rear tug wheel structure of a multi-needle machine, the multi-needle machine comprising a machine head (1), the machine head (1) being connected to a lifting column (2) capable of moving up and down, the rear tug wheel structure comprising a tug frame (3) and a tug gear (4) rotatably connected to the tug frame (3), characterized in that: The lower end of the lifting column (2) is fixedly connected with a horizontally arranged strip-shaped adjustment plate (5), and the adjustment plate (5) is hinged to the drag frame (3) through a horizontally arranged pin shaft (6), and the pin shaft (6) is perpendicular or approximately perpendicular to the axis of the mopping gear (4). The adjustment plate (5) is threadedly connected with two tensioning members (7) that can move up and down relative to the adjustment plate (5), and the two tensioning members (7) are respectively located on both sides of the pin shaft (6), and the lower end surfaces of the tensioning members (7) are both in contact with the drag frame (3).

2. The rear pulley structure of the multi-needle machine according to claim 1, characterized in that: The top surface of the towing frame (3) has a strip groove (31) arranged along the axial direction of the mopping gear (4); the adjusting plate (5) is embedded in the strip groove (31); a gap is left between the bottom surface of the adjusting plate (5) and the bottom surface of the strip groove (31); and the lower end surface of the pressing member (7) abuts against the bottom surface of the strip groove (31).

3. The rear puller structure of the multi-needle machine according to claim 2, characterized in that: A horizontally arranged pre-tightening screw (8) is threadedly provided on the carriage (3), and the inner end of the pre-tightening screw (8) abuts against the adjustment plate (5) in the strip groove (31) along the width direction of the strip groove (31).

4. The rear puller structure of the multi-needle machine according to claim 1, 2 or 3, characterized in that: The two tightening members (7) are respectively located at two ends of the adjusting plate (5) in the length direction.

5. The rear pulley structure of the multi-needle machine according to claim 1, 2 or 3, characterized in that: The lifting column (2) is vertically opposite to the pin shaft (6).

6. The rear pulley structure of the multi-needle machine according to claim 1, 2 or 3, characterized in that: The pressing piece (7) is a stud arranged in the up-down direction. The pressing piece (7) passes through the adjusting plate (5) and is threadedly engaged with the adjusting plate (5).

7. The rear pulley structure of the multi-needle machine according to claim 6, characterized in that: The tightening member (7) is a hexagonal screw.

8. The rear pulley structure of the multi-needle machine according to claim 2 or 3, characterized in that: The bottom of the adjustment plate (5) has a protrusion (51), the pin shaft (6) passes through the protrusion (51), the bottom surface of the strip-shaped groove (31) has a clearance hole (32), and the protrusion (51) is located in the clearance hole (32).

9. The rear pulley structure of the multi-needle machine according to claim 2 or 3, characterized in that: There is a gap between the two ends of the adjustment plate (5) and the inner wall of the strip-shaped groove (31).

Images