Differential adjusting mechanism for flat seaming machine
By designing a differential adjustment mechanism driven by the differential tooth motor in the seam stretching machine, the problems of insufficient manual adjustment accuracy and labor-consuming are solved, and high-precision and high-efficiency electric adjustment are achieved.
Patent Information
- Application Number
- CN202422242146.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-13
AI Technical Summary
There are problems of insufficient accuracy and labor-consuming manual adjustment of differential teeth in existing seam stretching machines.
A differential adjustment mechanism for a seam stretching machine is designed, and the spindle is driven by a differential tooth motor, which lubricates the spindle through an oil pump, drives the transmission assembly and differential tooth movement to achieve electric adjustment.
Improves adjustment accuracy, saves manpower, improves work efficiency, and is convenient to operate.
Smart Images
Figure CN223003115U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of overlock sewing machines, and particularly relates to a differential adjustment mechanism for an overlock sewing machine. Background Art
[0002] In the existing overlock sewing machines, the actual stitch length during sewing is mainly determined by the movement conditions of the main feed dog and the differential feed dog. The movement distance ratio between the differential feed dog and the main feed dog, that is, the differential ratio, can adjust the flatness of the fabric during sewing.
[0003] For different processes and product patterns, the flatness of the fabric to be sewn is different. Some require the fabric to be flat, while some processes require the sewn fabric to have wrinkles. This requires adjusting the movement amounts of the main feed dog and the differential feed dog in the sewing machine to obtain the required stitch length and flatness.
[0004] Since the fabric feeding amount when the main feed dog and the differential feed dog cooperate determines the stitch length during sewing, when adjusting the stitch length, it is usually the staff who operate the main adjustment mechanism and / or the differential adjustment mechanism in the sewing machine so that the movement of the main feed dog and / or the differential feed dog meets the requirements, thereby obtaining the required fabric feeding amount, and then locking the main adjustment mechanism and / or the differential adjustment mechanism to fix the movement margin of the main feed dog and / or the differential feed dog.
[0005] This manual adjustment method has the problem of insufficient accuracy, and the operation of the staff is time-consuming and laborious. Summary of the Utility Model
[0006] In order to solve the problems of insufficient accuracy and labor consumption existing in the existing manual adjustment of the differential feed dog, the utility model provides a differential adjustment mechanism for an overlock sewing machine that can be electrically adjusted, improve accuracy and is convenient to operate and save time.
[0007] The technical solution of the utility model lies in:
[0008] A differential adjustment mechanism for an overlock sewing machine of the utility model includes a differential feed dog motor, a main shaft, an oil pump, a transmission component and a differential feed dog. The differential feed dog motor is provided with an output shaft, the main shaft is connected to the output shaft, the oil pump is attached to one side of the main shaft, one end of the transmission component is connected to the main shaft, and the other end of the transmission component is connected to the differential feed dog.
[0009] Further, the transmission assembly includes a first swing arm, a first transmission rod, a second swing arm, a second transmission rod, a first transmission block and a second transmission block. The first transmission block and the second transmission block are overlapped. The differential tooth is fixedly connected to the second transmission block. The second transmission rod is fixedly connected to the second transmission block. The first transmission rod is fixedly connected to the first transmission block and the second transmission block. One end of the first swing arm is inserted through the main shaft, and the other end of the first swing arm is connected to the first transmission rod. One end of the second swing arm is inserted through the main shaft, and the other end of the second swing arm is connected to the second transmission rod.
[0010] Further, an eccentric wheel is provided on the main shaft. The eccentric wheel includes a first eccentric section, an intermediate partition plate and a second eccentric section. One end of the first swing arm is inserted through the first eccentric section, and one end of the second swing arm is inserted through the second eccentric section.
[0011] Further, a bottom needle assembly is further included. The bottom needle assembly includes a bottom needle, a third transmission rod and a third swing arm. One end of the third swing arm is inserted through the main shaft, and the other end of the third swing arm is connected to the third transmission rod. The bottom needle is fixedly connected to the third transmission rod.
[0012] Further, the bottom needle assembly further includes a fourth swing arm, a horizontal shaft and a fifth swing arm. One end of the fourth swing arm is inserted through the main shaft, and the other end of the fourth swing arm is connected to the horizontal shaft. One end of the fifth swing arm is connected to the horizontal shaft, and the other end of the fifth swing arm is connected to the third transmission rod.
[0013] Further, bearings are provided between the first swing arm and the first eccentric section and between the second swing arm and the second eccentric section.
[0014] Further, a bearing is provided between the third swing arm and the main shaft.
[0015] The beneficial effects of the present utility model are as follows:
[0016] The main shaft is driven by a differential tooth motor, and the main shaft drives an oil pump to pump oil to lubricate the main shaft, ensuring that the main shaft smoothly drives the transmission assembly. The transmission assembly further drives the differential tooth to move. Therefore, manual adjustment is not required. As long as the differential tooth motor is controlled, the differential tooth can be adjusted, ensuring accuracy, saving manpower and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of a differential adjustment mechanism for an overlock sewing machine according to the present utility model;
[0018] Figure 2Structural schematic of a differential adjustment mechanism for an overlock sewing machine of the present utility model, omitting the bottom needle assembly Figure 1 ;
[0019] Figure 3 Structural schematic of a differential adjustment mechanism for an overlock sewing machine of the present utility model, omitting the bottom needle assembly Figure 2 ;
[0020] Figure 4 Enlarged structural schematic of an eccentric wheel of a differential adjustment mechanism for an overlock sewing machine of the present utility model;
[0021] Figure 5 Structural schematic of a differential adjustment mechanism for an overlock sewing machine of the present utility model, omitting the transmission assembly Figure 1 ;
[0022] Figure 6 Structural schematic of a differential adjustment mechanism for an overlock sewing machine of the present utility model, omitting the transmission assembly Figure 2 ;
[0023] Figure 7 Exploded structural schematic of the first swing arm, the second swing arm and the third swing arm of a differential adjustment mechanism for an overlock sewing machine of the present utility model;
[0024] Reference numerals: 1, differential feed motor; 11, output shaft; 2, main shaft; 3, oil pump; 4, transmission assembly; 41, first swing arm; 42, first transmission rod; 43, second swing arm; 44, second transmission rod; 45, first transmission block; 46, second transmission block; 5, differential feed dog; 6, eccentric wheel; 61, first eccentric section; 62, intermediate partition; 63, second eccentric section; 7, bottom needle assembly; 71, bottom needle; 72, third transmission rod; 73, third swing arm; 74, fourth swing arm; 75, horizontal shaft; 76, fifth swing arm; 8, bearing. Detailed implementation manners
[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] It should be noted that when an element is referred to as being "mounted on", "provided on", "covered on", "sleeved on", "clamped on" another element, it can be directly on the other element or indirectly on the other element.
[0027] It should be understood that in the description of the present utility model, the meaning of "a number of" is two or more, unless otherwise specifically defined.
[0028] In addition, the orientation or positional relationship indicated by terms such as "inner", "upper", "between", "both sides", "one side", "top", "bottom", "side" etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0029] It should be noted that the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features.
[0030] It should be noted that "and / or" herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A and B can be singular or plural respectively.
[0031] Please refer to Figures 1 - 7 , the present utility model provides a differential adjustment mechanism for an overlock sewing machine, including a differential feed dog motor 1, a main shaft 2, an oil pump 3, a transmission assembly 4, and a differential feed dog 5. The differential feed dog motor 1 is provided with an output shaft 11, the main shaft 2 is connected to the output shaft 11, the oil pump 3 is attached to one side of the main shaft 2, one end of the transmission assembly 4 is connected to the main shaft 2, and the other end of the transmission assembly 4 is connected to the differential feed dog 5. By driving the main shaft 2 with the differential feed dog motor 1, the main shaft 2 drives the oil pump 3 to pump oil to lubricate the main shaft 2, ensuring that the main shaft 2 smoothly drives the transmission assembly 4, and the transmission assembly 4 further drives the differential feed dog 5 to move. Thus, there is no need for manual adjustment. As long as the differential feed dog motor 1 is controlled, the differential feed dog 5 can be adjusted, ensuring accuracy, saving manpower, and improving work efficiency.
[0032] Specifically, to control the differential feed dog motor 1, it is designed that there is a controller in the overlock sewing machine, and the controller is connected with control buttons. By adjusting the control buttons for addition and subtraction, the differential feed dog 5 can be quickly adjusted.
[0033] Further, since the main movements of the differential tooth 5 are forward and backward, the transmission assembly 4 includes a first swing arm 41, a first transmission rod 42, a second swing arm 43, a second transmission rod 44, a first transmission block 45 and a second transmission block 46. The first swing arm 41, the first transmission rod 42 and the first transmission block 45 can achieve the forward movement of the differential tooth 5, and the second swing arm 43, the second transmission rod 44 and the second transmission block 46 can achieve the backward movement of the differential tooth 5. The first transmission block 45 and the second transmission block 46 are overlapped. The differential tooth 5 is fixedly connected to the second transmission block 46. The second transmission rod 44 is fixedly connected to the second transmission block 46. The first transmission rod 42 is fixedly connected to the first transmission block 45 and the second transmission block 46. One end of the first swing arm 41 is inserted through the main shaft 2, and the other end of the first swing arm 41 is connected to the first transmission rod 42. One end of the second swing arm 43 is inserted through the main shaft 2, and the other end of the second swing arm 43 is connected to the second transmission rod 44.
[0034] Further, an eccentric wheel 6 is provided on the main shaft 2. The eccentric wheel 6 includes a first eccentric section 61, an intermediate partition 62 and a second eccentric section 63. One end of the first swing arm 41 is inserted through the first eccentric section 61, and one end of the second swing arm 43 is inserted through the second eccentric section 63. The eccentric design just enables the first swing arm 41 and the second swing arm 43 to perform staggered movements under the drive of the same differential tooth motor 1, and the swing amplitudes are different.
[0035] Further, a bottom needle assembly 7 is further included. The bottom needle assembly 7 includes a bottom needle 71, a third transmission rod 72 and a third swing arm 73. One end of the third swing arm 73 is inserted through the main shaft 2, and the other end of the third swing arm 73 is connected to the third transmission rod 72. The bottom needle 71 is fixedly connected to the third transmission rod 72. When the output shaft 11 of the differential tooth motor 1 works, it drives the main shaft 2 to work. The main shaft 2 drives the third swing arm 73 to swing, and further drives the third transmission rod 72 and the bottom needle 71 to swing. Therefore, the movement of the bottom needle 71 is also driven by the differential tooth motor 1, which saves the use of the motor and can reduce the volume of the overlock sewing machine.
[0036] Furthermore, the bottom needle assembly 7 further includes a fourth swing arm 74, a horizontal shaft 75, and a fifth swing arm 76. One end of the fourth swing arm 74 is inserted into the main shaft 2, the other end of the fourth swing arm 74 is connected to the horizontal shaft 75, one end of the fifth swing arm 76 is connected to the horizontal shaft 75, and the other end of the fifth swing arm 76 is connected to the third transmission rod 72. The output shaft 11 of the differential tooth motor 1 operates to drive the main shaft 2. The main shaft 2 drives the fourth swing arm 74 to swing, further pulling the horizontal shaft 75 and the fifth swing arm 76. The fifth swing arm 76 drives the third transmission rod 72, and the third transmission rod 72 drives the bottom needle 71 to swing. Through the settings of the fourth swing arm 74, the horizontal shaft 75, and the fifth swing arm 76, the movement range of the bottom needle 71 is limited, and the movement of the bottom needle 71 is further stabilized.
[0037] Furthermore, bearings 8 are provided between the first swing arm 41 and the first eccentric section 61 and between the second swing arm 43 and the second eccentric section 63.
[0038] Furthermore, a bearing 8 is provided between the third swing arm 73 and the main shaft 2.
[0039] The above-mentioned bearing 8 can be a needle bearing. Through the design of the bearing 8, the friction can be reduced, and the main shaft 2 can drive the corresponding first swing arm 41, second swing arm 43, and third swing arm 73 more smoothly.
[0040] The above-described embodiments only represent one implementation manner of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.
Claims
1. A differential adjustment mechanism for a flat sewing machine, characterized in that: The invention comprises a differential gear motor (1), a main shaft (2), an oil pump (3), a transmission assembly (4) and a differential gear (5); the differential gear motor (1) is provided with an output shaft (11); the main shaft (2) is connected to the output shaft (11); the oil pump (3) is attached to one side of the main shaft (2); one end of the transmission assembly (4) is connected to the main shaft (2); and the other end of the transmission assembly (4) is connected to the differential gear (5).
2. The differential adjustment mechanism for a flat seam sewing machine according to claim 1, characterized in that: The transmission assembly (4) comprises a first swing arm (41), a first transmission rod (42), a second swing arm (43), a second transmission rod (44), a first transmission block (45) and a second transmission block (46); the first transmission block (45) and the second transmission block (46) are arranged overlappingly; the differential tooth (5) is fixedly connected to the second transmission block (46); the second transmission rod (44) is fixedly connected to the second transmission block (46); the first transmission rod (42) is fixedly connected to the first transmission block (45) and the second transmission block (46); one end of the first swing arm (41) is passed through the main shaft (2); the other end of the first swing arm (41) is connected to the first transmission rod (42); one end of the second swing arm (43) is passed through the main shaft (2); the other end of the second swing arm (43) is connected to the second transmission rod (44).
3. The differential adjustment mechanism for a flat seam sewing machine according to claim 2, characterized in that: An eccentric wheel (6) is provided on the main shaft (2), and the eccentric wheel (6) comprises a first eccentric segment (61), a middle partition (62) and a second eccentric segment (63); one end of the first swing arm (41) is passed through the first eccentric segment (61), and one end of the second swing arm (43) is passed through the second eccentric segment (63).
4. The differential adjustment mechanism for a flat seam sewing machine according to claim 1, characterized in that: The invention also comprises a bottom needle assembly (7), wherein the bottom needle assembly (7) comprises a bottom needle (71), a third transmission rod (72) and a third swing arm (73), one end of the third swing arm (73) is passed through the main shaft (2), the other end of the third swing arm (73) is connected to the third transmission rod (72), and the bottom needle (71) is fixedly connected to the third transmission rod (72).
5. The differential adjustment mechanism for a flat seam sewing machine according to claim 4, characterized in that: The bottom needle assembly (7) further comprises a fourth swing arm (74), a horizontal shaft (75) and a fifth swing arm (76); one end of the fourth swing arm (74) is passed through the main shaft (2); the other end of the fourth swing arm (74) is connected to the horizontal shaft (75); one end of the fifth swing arm (76) is connected to the horizontal shaft (75); and the other end of the fifth swing arm (76) is connected to the third transmission rod (72).
6. The differential adjustment mechanism for a flat seam sewing machine according to claim 3, characterized in that: Bearings (8) are provided between the first swing arm (41) and the first eccentric segment (61), and between the second swing arm (43) and the second eccentric segment (63).
7. The differential adjustment mechanism for a flat seam sewing machine according to claim 4, characterized in that: A bearing (8) is provided between the third swing arm (73) and the main shaft (2).