Winding device and sewing machine

Abstract

The present invention discloses a winding device and a sewing machine containing the winding device. The purpose of the present invention is achieved as follows: a winding device includes a tensioning wheel assembly arranged in a housing, the tensioning wheel assembly has a roller portion, the roller portion abuts against the synchronous belt and rotates therewith; a friction surface is arranged on the front side of the roller portion; a winding mechanism is also arranged at the front of the housing, the winding shaft of the winding mechanism extends into the housing and is installed with a friction wheel; the winding mechanism has a working state and a non-working state: when the winding mechanism is in the working state, the friction wheel abuts against the friction surface and is driven; when the winding mechanism is in the non-working state, the friction wheel is separated from the friction surface. The position of the winding mechanism is creatively changed from the traditional position at the upper end of the main shaft to one side of the tensioning wheel assembly. And because the position is exactly the most common front side for workers during operation, workers can directly replace the bobbin on the winding mechanism very conveniently and intuitively during operation.

Description

Technical Field

[0001] The invention belongs to the technical field of sewing machines, and in particular relates to a winding device and a sewing machine comprising the winding device. Background Art

[0002] At present, a bobbin winder is generally provided on the upper part of the casing of a sewing machine, and a bobbin is placed on the bobbin winder. The bobbin on the bobbin winder is driven to rotate by the rotation of the upper shaft of the sewing machine, so that the sewing thread is wound on the bobbin.

[0003] For example, the patent No. 201710397735.6 specifically discloses the structural principle of a wire winder and the working scenario of an existing wire winder.

[0004] However, as sewing machines become more and more intelligent, high-end sewing machines are generally equipped with large-size display screens. The position of the display screen and the winding wheel is prone to conflict, resulting in the position of the winding mechanism on traditional sewing machines being no longer suitable for the development of the times. Summary of the invention

[0005] The purpose of the present invention is to provide a mounting device with a replaced winding mechanism position, and a technical solution for applying the winding device to a sewing machine.

[0006] The object of the present invention is achieved as follows: A winding device includes a tensioner assembly arranged in a housing, the tensioner assembly having a roller portion, the roller portion abutting against a synchronous belt and rotating therewith;

[0007] The front side of the roller portion is provided with a friction surface;

[0008] The front part of the housing is also provided with a winding mechanism, the winding shaft of the winding mechanism extends into the housing and is provided with a friction wheel;

[0009] The winding mechanism has a working state and a non-working state:

[0010] When the winding mechanism is in working state, the friction wheel abuts against the friction surface and is driven;

[0011] When the winding mechanism is in a non-working state, the friction wheel is separated from the friction surface.

[0012] Preferably, one end of the roller part is connected to an adjusting shaft, and the adjusting shaft rotates synchronously with the roller part; the adjusting shaft and the roller part are eccentrically arranged, and the adjusting shaft is used to drive the roller part to rotate eccentrically through its own rotation to adjust the tension degree.

[0013] Preferably, a connecting hole is formed at one end of the adjusting shaft, a connecting shaft is arranged in the connecting hole, the connecting shaft passes through the roller part and the adjusting shaft in sequence, and is connected to the adjusting shaft through the connecting hole.

[0014] Preferably, a connecting bearing is sleeved on the inner side of the roller portion, and the connecting shaft is inserted into the connecting bearing.

[0015] Preferably, a power-assisting hole is formed on the outer edge of the adjusting shaft along the radial direction, and the power-assisting hole is located on the outer side of the shell.

[0016] Preferably, a circumferential array of raised portions is formed on the end surface of the friction surface, and the raised portions are in the shape of strips.

[0017] Preferably, the winding mechanism is located in the middle of the front side of the support seat of the shell.

[0018] Preferably, the winding mechanism includes a winding base, a winding shaft is inserted into the winding base, one end of the winding shaft is connected to the friction wheel; the other end of the winding shaft passes through the winding base and extends outside the winding base to form a connecting end, which is used to sleeve the bobbin.

[0019] Preferably, a toggle wrench is provided on the outer side of the connecting end, and the toggle wrench is used to switch the winding mechanism between a non-working state and a working state.

[0020] A sewing machine comprises a shell, a driving shaft is arranged on the upper part of the shell, a driven shaft is arranged on the lower part of the shell, and the driving shaft and the driven shaft are driven by a synchronous belt; it comprises any one of the winding devices described above; the adjusting shaft passes through a support seat along the length direction of the shell and abuts against the synchronous belt.

[0021] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0022] 1. The invention creatively changes the location of the winding mechanism from the traditional upper end of the main shaft to the side of the tensioner assembly. And because the location is exactly the front side that workers most often see during operation, workers can directly replace the bobbin on the winding mechanism very conveniently and intuitively during operation.

[0023] 2. The tension wheel assembly of the present invention is cleverly arranged along the length direction of the housing, passing through the support seat and resting against the synchronous belt. Such a position design not only has the function of tightening the synchronous belt, but also does not interfere with other parts of the existing sewing machine. In actual use, workers can tighten by turning the adjustment shaft by hand, and the adjustment is very flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is one of the structural diagrams of the present invention;

[0025] Figure 2 It is the second structural diagram of the present invention;

[0026] Figure 3 It is the working principle diagram of the winding mechanism and the tensioner assembly;

[0027] Figure 4 yes Figure 2 A partial enlarged view of the middle winding mechanism and the tensioner assembly;

[0028] Figure 5 This is an exploded view of the tensioner assembly.

[0029] In the figure: 1-housing; 2-synchronous belt; 3-driving motor; 4-winding mechanism; 5-tensioning wheel assembly; 6-base; 7-upper synchronous wheel; 8-driving shaft; 10-friction wheel; 11-winding base; 12-lower synchronous wheel; 13-winding shaft; 14-bobbin; 15-driven shaft; 16-support seat; 19-toggle wrench; 51-roller part; 52-friction surface; 53-connecting shaft; 54-adjusting shaft; 55-connecting hole; 56-connecting bearing. DETAILED DESCRIPTION

[0030] The present invention is further described below with reference to specific embodiments.

[0031] Embodiment 1: Figure 1-5 As shown, a sewing machine includes a housing 1 and a base 6. A driving shaft 8 is arranged on the upper part of the housing 1, and a driven shaft 15 is arranged on the lower part of the housing 1. The driving shaft 8 and the driven shaft 15 are driven by a synchronous belt 2.

[0032] From the above, it can be known that the sewing machine described in the present invention refers to a sewing machine with a driving shaft 8 and a driven shaft 15, and the driven shaft 15, and the driving shaft 8 and the driven shaft 15 can be used only when the transmission is carried out through a synchronous belt 2. Correspondingly, an upper synchronous wheel 7 and a lower synchronous wheel 12 are respectively provided on the driving shaft 8 and the driven shaft 15. There is a driving motor 3 at one end of the driving shaft 8, and the rotation of the driving motor 3 drives the driving shaft 8 and the upper synchronous wheel 7 to rotate in turn, and finally the synchronous belt 2 sleeved on the outer side of the upper synchronous wheel 7 and the lower synchronous wheel 12 rotates. The above structure has a corresponding structure on a double-needle machine, a straight-eye machine and a modified lockstitch sewing machine, and those skilled in the art can clearly understand the content of the above technical solution.

[0033] The driving shaft 8 described in this embodiment is also commonly referred to as the "upper shaft" in the field of sewing machines, and the driven shaft 15 is also commonly referred to as the "lower shaft" in the field of sewing machines.

[0034] Next, the installation structure between the winding device and the housing 1 is described in detail. The winding device includes a tensioner assembly 5 disposed in the housing 1. The tensioner assembly 5 has a roller portion 51. The roller portion 51 abuts against the synchronous belt 2 and rotates therewith. Figure 1As shown, the roller portion 51 passes through the support seat 16 from the right side to the left side along the length direction of the housing 1 and abuts against the synchronous belt 2 , and can rotate with the help of the rotation of the synchronous belt 2 by abutting against the synchronous belt 2 .

[0035] A friction surface 52 is disposed on the front side of the roller portion 51 ; therefore, in this embodiment, the rotation of the roller portion 51 drives the rotation of the friction surface 52 .

[0036] The front part of the housing is also provided with a winding mechanism, the winding shaft of the winding mechanism 4 extends into the housing 1 and is equipped with a friction wheel 10;

[0037] The winding mechanism 4 has a working state and a non-working state:

[0038] When the winding mechanism is in working state, the friction wheel 10 abuts against the friction surface 52 and is driven;

[0039] When the winding mechanism is in a non-operating state, the friction wheel 10 is separated from the friction surface 52 .

[0040] The above-mentioned winding device cleverly utilizes the rotation of the synchronous belt 2, and uses the roller portion 51 of the tensioner assembly 5 to bear the rotation of the synchronous belt 2, and when the winding mechanism is in a working state, the friction wheel 10 is abutted against the friction surface 52 to be driven, thereby realizing the winding operation of the bobbin.

[0041] The winding mechanism of the present invention creatively changes its position from the traditional upper end of the main shaft to the side of the tensioner assembly 5. Moreover, since it is located at the front side most often seen by workers during operation, workers can directly replace the bobbin on the winding mechanism very conveniently and intuitively during operation. The existing winding mechanism is located at the upper end of the housing 1, which will block the line of sight when replacing the bobbin, which is not conducive to operation.

[0042] In addition, the tension wheel assembly 5 is matched with the position of the tension wheel assembly 5, and the two complement each other and promote the realization of the corresponding functions. In other words, the tension wheel assembly 5 described in this embodiment not only has the function of tightening the synchronous belt, but also can rotate the winding mechanism through the structural design to realize automatic winding of the bobbin.

[0043] like Figure 5 As shown, the structure of the tensioner assembly 5 is described in detail below. Preferably, one end of the roller portion 51 is connected to an adjustment shaft 54, and the adjustment shaft rotates synchronously with the roller portion 51; the adjustment shaft 54 ​​is eccentrically arranged with the roller portion 51, and the adjustment shaft 54 ​​is used to drive the roller portion 51 to rotate eccentrically through its own rotation to adjust the tension.

[0044] The eccentric arrangement of the adjustment shaft 54 ​​and the roller portion 51 described in the present technical solution means that, in the present embodiment, the adjustment shaft 54 ​​and the roller portion 51 are both cylindrical in shape, and their axes are parallel but not coaxial.

[0045] Specifically, in this embodiment, a connection hole 55 is formed at one end of the adjustment shaft 54, and the axis position of the connection hole 55 is not colinear with the adjustment shaft 54. Therefore, an eccentric arrangement is formed between the adjustment shaft 54 ​​and the roller portion 51.

[0046] The connecting hole 55 is provided with a connecting shaft 53. Figure 5 As shown, a hexagonal hole is formed at one end of the connecting shaft 53, and a cylindrical shaft portion is formed at the other end. The connecting shaft 53, that is, the cylindrical shaft portion, passes through the roller portion 51 and the adjusting shaft 54 ​​in sequence, and is connected to the adjusting shaft 54 ​​through the connecting hole 55, and the hexagonal hole can facilitate connection.

[0047] With this design, when the adjusting shaft 54 ​​is rotated, the relative position between the roller portion 51 and the synchronous belt 2 will be changed due to the eccentric arrangement between the roller portion 51 and the adjusting shaft 54. Figure 3 From the perspective of FIG. 1 , the function of the tensioner assembly 5 is to enable the right side of the synchronous belt 2 to move left and right.

[0048] And if Figure 1-2 As shown, in this embodiment, the adjustment shaft 54 ​​passes through the support seat 16 along the length direction of the housing 1 and abuts against the synchronous belt 2. Such a position design not only has the function of tightening the synchronous belt, but also does not interfere with other parts of the existing sewing machine, and the adjustment is very flexible. In actual use, workers can tighten by turning the adjustment shaft 54, and the adjustment is very flexible. Therefore, the adjustment shaft 54 ​​also needs to retain a handheld portion outside the housing 1.

[0049] However, in actual use, due to size limitations, the adjustment range is limited. However, the tensioning wheel assembly 5 can be brought as close as possible to the synchronous belt 2 to achieve maximum tensioning, so that even if the adjustment range is limited in the later stage, it can still meet the requirements.

[0050] Preferably, a connecting bearing 56 is sleeved on the inner side of the roller portion 51, and the connecting shaft 53 is inserted into the connecting bearing 56. In actual use, the rotation speed of the sewing machine is relatively high, and the connecting bearing 56 is required to reduce friction. Therefore, in this embodiment, the connecting bearing 56 preferably adopts a deep groove ball bearing. The corresponding roller portion 51 will be adapted to the outer ring of the connecting bearing 56, and then the connecting shaft 53 will be adapted to the inner ring of the connecting bearing 56. Therefore, no matter how fast the roller portion 51 rotates, it will not affect the adjustment shaft 54.

[0051] Preferably, a power-assisting hole 57 is formed on the outer edge of the adjusting shaft 54 ​​along the radial direction, and the power-assisting hole 57 is located on the outer side of the housing 1 .

[0052] In actual use, the adjustment shaft 54 ​​needs to be rotated. The most common method is to increase the length of the adjustment shaft 54 ​​so that a hand-held portion is formed at its tail end so that the adjustment shaft can be rotated. However, in order to take into account the overall shape of the housing, it is impossible to extend the adjustment shaft 54 ​​too far out of the outer side of the housing 1. Therefore, the design of the power-assisting hole 57 can solve this problem.

[0053] As long as there is a shaft part that can pass through the power-assisting hole 57, a "handle" structure can be formed, so that the adjustment shaft 54 ​​can be easily rotated. One of the shaft parts can be an L-shaped hexagonal wrench, which can be inserted into the power-assisting hole 57 using its long side or short side.

[0054] In addition, as a preferred technical solution, the power-assisting hole 57 can also be a hole that passes through the adjustment shaft 54, so that the user can rotate from both sides at the same time, which is more labor-saving.

[0055] Preferably, the end surface of the friction surface 52 is formed with a circumferential array of protrusions, which are in the shape of strips. The protrusion design of the protrusion can increase the friction force and reduce the "slip" phenomenon between the friction surface 52 and the friction wheel 10. Moreover, the circumferential array of protrusions can cooperate with the rotation of the friction wheel 10, so that the connection between the friction surface 52 and the friction wheel 10 is more uniform and is always in a stable friction state.

[0056] Preferably, the winding mechanism 4 is located in the middle of the front side of the support seat 16 of the housing 1. Such a position design is very convenient for workers to operate, and is more intuitive without visual obstruction.

[0057] Preferably, the winding mechanism 4 includes a winding base 11, a winding shaft 13 is inserted into the winding base 11, and one end of the winding shaft 13 is connected to the friction wheel 10; the other end of the winding shaft 13 passes through the winding base 11 and extends to the outside of the winding base 11 to form a connecting end, and the connecting end is used to sleeve the shuttle core 14. A toggle wrench 19 is provided on the outside of the connecting end, and the toggle wrench 19 is used to switch the winding mechanism between the non-working state and the working state. How to achieve the switching specifically belongs to the existing technology and will not be elaborated here.

[0058] Embodiment 2: This embodiment is basically the same as embodiment 1, except that the inner ring of the connecting bearing 56 is matched with the outer edge of the adjusting shaft 54, and the outer ring of the connecting bearing 56 is matched with the side wall hole on the supporting seat 16 originally used to install the adjusting shaft 54.

[0059] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A winding device, characterized in that: The invention comprises a tension wheel assembly (5) arranged in a housing (1), wherein the tension wheel assembly (5) comprises a roller portion (51), the roller portion (51) abuts against the synchronous belt (2) and rotates therewith; a friction surface (52) is arranged on the front side of the roller portion (51); One end of the roller part (51) is connected to an adjusting shaft (54), and the adjusting shaft and the roller part (51) rotate synchronously; the adjusting shaft (54) and the roller part (51) are eccentrically arranged, and the adjusting shaft (54) is used to drive the roller part (51) to rotate eccentrically through its own rotation, thereby adjusting the tension degree; The front part of the housing is also provided with a winding mechanism (4), and the winding shaft of the winding mechanism (4) extends into the housing (1) and is provided with a friction wheel (10); The winding mechanism (4) comprises a winding base (11), a winding shaft (13) is inserted into the winding base (11), one end of the winding shaft (13) is connected to the friction wheel (10); the other end of the winding shaft (13) passes through the winding base (11) and extends outside the winding base (11) to form a connecting end, and the connecting end is used to sleeve the bobbin (14); The winding mechanism (4) has a working state and a non-working state: When the winding mechanism (4) is in a working state, the friction wheel (10) abuts against the friction surface (52) and is driven; when the winding mechanism (4) is in a non-working state, the friction wheel (10) is separated from the friction surface (52).

2. A winding device according to claim 1, characterized in that: A connecting hole (55) is formed at one end of the adjusting shaft (54), a connecting shaft (53) is arranged in the connecting hole (55), and the connecting shaft (53) passes through the roller portion (51) and the adjusting shaft (54) in sequence and is connected to the adjusting shaft (54) through the connecting hole (55).

3. A winding device according to claim 2, characterized in that: A connecting bearing (56) is sleeved on the inner side of the roller portion (51), and the connecting shaft (53) is inserted into the connecting bearing (56).

4. A winding device according to claim 3, characterized in that: The outer edge of the adjustment shaft (54) is formed with a power-assisting hole (57) in the radial direction, and the power-assisting hole (57) is located outside the housing (1).

5. A winding device according to claim 1, characterized in that: The end surface of the friction surface (52) is formed with a circumferential array of protrusions, and the protrusions are in the shape of strips.

6. A winding device according to claim 1, characterized in that: The winding mechanism (4) is located in the middle of the front side of the support seat (16) of the housing (1).

7. A winding device according to claim 1, characterized in that: A toggle wrench (19) is arranged on the outer side of the connection end, and the toggle wrench (19) is used to switch the winding mechanism (4) between a non-working state and a working state.

8. A sewing machine, comprising a housing (1), wherein a driving shaft (8) is arranged at the upper part of the housing (1), and a driven shaft (15) is arranged at the lower part of the housing (1), and the driving shaft (8) and the driven shaft (15) are driven by a synchronous belt (2); characterized in that: It comprises the winding device as claimed in any one of claims 1 to 7; the adjusting shaft (54) passes through the supporting seat (16) along the length direction of the housing (1) and abuts against the synchronous belt (2).

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