Branching mechanism and chained button sewing machine

Abstract

The utility model discloses a thread separating mechanism and a chain type button sewing machine, and relates to the technical field of sewing machines, the thread separating mechanism comprises a rotatably arranged lower shaft, a thread separating plate with a supporting end slidably arranged along the axial direction of the lower shaft, and a bevel gear set arranged between the lower shaft and the thread separating plate; the bevel gear set is provided with an eccentric rotating shaft, the eccentric rotating shaft is fixedly connected with the distributor plate, and the bevel gear set drives the swing end of the distributor plate to swing along a fusiform track through the eccentric rotating shaft. According to the utility model, the structure of the thread separating mechanism is optimized, and the bevel gear set is used for replacing two groups of original cam mechanisms, so that the rotating speed of the optimized thread separating mechanism is not limited by the cam mechanisms any more, the thread separating mechanism can adapt to higher rotating speed, and the sewing efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a thread dividing mechanism and a chain button sewing machine. Background Art

[0002] At present, as attached Figure 1 As shown, the line dividing mechanism of the existing chain button sewing machine includes a lower shaft 01, a triangular cam 02, an annular cam 03, a line dividing slide 04, a line dividing piece 05, a line dividing slide seat 06 and a line dividing connecting rod 07, wherein the triangular cam 02 and the annular cam 03 are both fixed on the lower shaft 01, the line dividing slide 04 is slidably arranged on the line dividing slide seat 06, the line dividing piece 05 is fixed on the line dividing slide 04, a cylindrical roller is provided at one end of the line dividing connecting rod 07, the cylindrical roller rolls along the bottom of the groove of the annular cam 03, and a cylindrical boss is provided at the other end of the line dividing connecting rod 07, the cylindrical boss cooperates with the waist-shaped groove of the line dividing piece 05.

[0003] The working principle of the wire dividing mechanism of the existing chain button sewing machine is as follows: the lower shaft 01 drives the triangular cam 02 to rotate, and the rotating eccentricity of the triangular cam 02 pushes the wire dividing slide plate 04 to slide back and forth along the X direction in the wire dividing slide plate seat 06, and the moving wire dividing slide plate 04 drives the wire dividing piece to reciprocate along the X direction; the lower shaft 01 drives the annular cam 02 to rotate, and the cylindrical roller of the wire dividing connecting rod 07 rolls along the groove bottom of the annular cam 02, and the wire dividing connecting rod 07 swings with the cylindrical roller as the fulcrum, so that the cylindrical boss at the other end of the wire dividing connecting rod 07 moves downward within the waist-shaped groove of the wire dividing piece 05, so that the wire dividing piece 05 moves back and forth along the Y direction.

[0004] The existing chain button sewing machine uses two sets of cam mechanisms in its thread dividing mechanism. To prevent the cam mechanisms from being severely worn due to high-speed rotation, the maximum speed of the thread dividing mechanism is usually limited to about 1500 rpm. The limitation of the speed makes it impossible to improve the sewing efficiency. Utility Model Content

[0005] The utility model aims to provide a thread dividing mechanism and a chain button sewing machine, which utilize a bevel gear set to replace a cam mechanism to transmit torque, thereby solving the technical problem that the sewing efficiency of the existing thread dividing mechanism cannot be improved due to the limited rotation speed.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a line dividing mechanism, comprising

[0007] A lower shaft that can be rotatably arranged;

[0008] A line dividing plate slidably arranged at the support end along the axial direction of the lower shaft;

[0009] A bevel gear set disposed between the lower shaft and the dividing plate;

[0010] Among them, the bevel gear set is provided with an eccentric rotating shaft, the eccentric rotating shaft is fixedly connected to the dividing plate, and the bevel gear set is used to drive the swinging end of the dividing plate to swing along a spindle-shaped trajectory through the eccentric rotating shaft.

[0011] Preferably, the bevel gear set comprises a driving bevel gear fixedly sleeved on the lower shaft and a driven bevel gear rotatably arranged, the driving bevel gear meshes with the driven bevel gear; and the eccentric rotating shaft is fixedly arranged on the large diameter end of the driven bevel gear.

[0012] Preferably, a supporting shaft is fixedly provided at the large diameter end of the driven bevel gear, a slewing bearing is provided outside the supporting shaft, the outer ring of the slewing bearing is fixedly arranged, and the slewing bearing is used to support the rotation of the driven bevel gear; the supporting shaft and the driven bevel gear are coaxially arranged, the eccentric shaft is integrally fixed at the end of the supporting shaft away from the driven bevel gear, and the central axis of the eccentric shaft is arranged away from the central axis of the supporting shaft.

[0013] Preferably, the line dividing plate is provided with a fixing through hole, and the eccentric rotating shaft matches with the fixing through hole and the two are interference connected.

[0014] Preferably, a connecting key is provided between the active bevel gear and the lower shaft, and the connecting key is used to drive the active bevel gear to rotate synchronously with the lower shaft.

[0015] Preferably, the active bevel gear is provided with a locking hole, the locking hole is equipped with a locking screw, and the locking screw abuts against the lower shaft.

[0016] Preferably, the swing end is provided with a branching groove and the support end is provided with a guide hole, an axial screw is passed through the guide hole, the axial screw is fixedly arranged, and the guide hole is used to guide the branching plate to swing with the axial screw as the swing fulcrum.

[0017] Preferably, a guide column is integrally formed on the neck of the axial screw, the guide column is slidably matched with the guide hole, and the diameter of the guide column is equal to the width of the guide hole.

[0018] Preferably, the guide hole is a waist-shaped hole.

[0019] The utility model also provides a chain button sewing machine, comprising the above-mentioned line dividing mechanism.

[0020] Compared with the background technology, the utility model optimizes the structure of the line dividing mechanism, and uses a bevel gear set to replace the original two sets of cam mechanisms. The bevel gear set is provided with an eccentric rotating shaft, and the eccentric rotating shaft is fixedly connected to the line dividing plate. The support end of the line dividing plate is slidably arranged along the axial direction of the lower shaft. When the lower shaft rotates, the lower shaft drives the bevel gear set to rotate, and the eccentric rotating shaft drives the swinging end of the line dividing plate to swing along a spindle-shaped trajectory, so that the line dividing plate performs reciprocating linear motion along the X direction or the Y direction. The rotation speed of the optimized line dividing mechanism is no longer limited by the cam mechanism, and can adapt to a higher rotation speed, which is conducive to improving sewing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 The present invention is a structural diagram of a line dividing mechanism of an existing chain button sewing machine;

[0023] Figure 2 The structural diagram of the line splitting mechanism of the chain button sewing machine provided in the embodiment of the utility model;

[0024] Figure 3 for Figure 2 Exploded diagram of

[0025] Figure 4 for Figure 2 The swinging track of the swinging end of the center line plate;

[0026] Figure 5 for Figure 2 Structural diagram of the driven bevel gear.

[0027] The reference numerals are as follows:

[0028] Lower shaft 01, triangular cam 02, annular cam 03, line splitting slide 04, line splitting sheet 05, line splitting slide seat 06 and line splitting connecting rod 07;

[0029] Lower shaft 1, splitter plate 2 and bevel gear set 3;

[0030] Fixing through hole 21, branching groove 22, guide hole 23 and axial screw 24;

[0031] Guide column 241;

[0032] A driving bevel gear 31 and a driven bevel gear 32;

[0033] An eccentric rotating shaft 321 , a supporting rotating shaft 322 and a slewing bearing 323 . DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The utility model embodiment discloses a line splitting mechanism, as shown in the attached Figure 2 and 3 As shown, it includes a lower shaft 1, a dividing plate 2 and a bevel gear set 3. The lower shaft 1 is rotatable, and the dividing plate 2 is parallel to the lower shaft 1. The two ends of the dividing plate 2 are a supporting end and a swinging end respectively. The supporting end is slidable along the axial direction of the lower shaft 1, so that the dividing plate 2 swings with the supporting end as a swing fulcrum, so that the swinging end performs a dividing action by swinging. The dividing plate 2 is a sheet metal part, and its working principle can be specifically referred to the prior art. The bevel gear set 3 is arranged between the lower shaft 1 and the dividing plate 2, and is used to transmit torque between the lower shaft 1 and the dividing plate 2.

[0037] The bevel gear set 3 is provided with an eccentric shaft 321, which is fixedly connected to the line dividing plate 2. When the lower shaft 1 rotates, the lower shaft 1 drives the bevel gear set 3 to rotate, and the eccentric shaft 321 drives the swing end of the line dividing plate 2 to swing along a spindle-shaped trajectory, as shown in the attached figure. Figure 4 As shown, the line distribution board 2 is made to perform reciprocating linear motion along the X direction or the Y direction.

[0038] The utility model optimizes the structure of the thread dividing mechanism, and utilizes the bevel gear set 3 to replace the original two sets of cam mechanisms. The rotation speed of the optimized thread dividing mechanism is no longer limited by the cam mechanism, and can adapt to a higher rotation speed, which is beneficial to improving sewing efficiency.

[0039] In addition, the number of parts involved in the optimized wire splitting mechanism is reduced, the structure is simpler, and the installation is more convenient, which is conducive to reducing the installation cost. It should also be added that the torque required for the transmission of the optimized wire splitting mechanism is reduced, which can effectively reduce the spindle load and help reduce the vibration and noise of the whole machine.

[0040] The bevel gear set 3 includes a driving bevel gear 31 and a driven bevel gear 32. The driving bevel gear 31 is fixedly mounted on the lower shaft 1 and rotates synchronously with the lower shaft 1. The driven bevel gear 32 is rotatable and can rotate around its own central axis. The driving bevel gear 31 and the driven bevel gear 32 are meshed, and the matching clearance between the two is adjustable. The transmission structure is stable and can achieve a higher speed. It should be noted that if the attached Figure 5 As shown, the eccentric rotating shaft 321 is fixedly arranged at the large diameter end of the driven bevel gear 32, so that the driven bevel gear 32 drives the dividing plate 2 to swing through the eccentric rotating shaft 321. Of course, the structure of the bevel gear set 3 is not limited to this.

[0041] As attached Figure 5As shown, a supporting shaft 322 is fixedly disposed at the large diameter end of the driven bevel gear 32, and a slewing bearing 323 is disposed on the outer sleeve of the supporting shaft 322. The outer ring of the slewing bearing 323 is fixedly disposed, and the inner ring thereof is interference-connected with the supporting shaft 322, so that the slewing bearing 323 supports the driven bevel gear 32 to rotate. The slewing bearing 323 can be a rolling ball bearing, but is not limited thereto. The supporting shaft 322 and the driven bevel gear 32 are coaxially disposed, and the eccentric shaft 321 is integrally fixedly disposed at one end of the supporting shaft 322 away from the driven bevel gear 32, and the central axis of the eccentric shaft 321 is disposed away from the central axis of the supporting shaft 322, so that the eccentric shaft 321 drives the line dividing plate 2 to swing when the driven bevel gear 32 rotates.

[0042] The line splitter 2 is provided with a fixing through hole 21, and the eccentric shaft 321 matches with the fixing through hole 21 and the two are interference connected, so that the eccentric shaft 321 is reliably connected to the line splitter 2. Of course, the connection method between the eccentric shaft 321 and the line splitter 2 is not limited to this.

[0043] A connecting key is provided between the active bevel gear 31 and the lower shaft 1, and the connecting key is used to drive the active bevel gear 31 to rotate synchronously with the lower shaft 1. The type and installation method of the connecting key can refer to the prior art and will not be described in detail here. Of course, the connection method between the active bevel gear 31 and the lower shaft 1 is not limited to this.

[0044] The active bevel gear 31 is provided with a locking hole, and a locking screw is installed in the locking hole, and the locking screw abuts against the lower shaft 1, so that the active bevel gear 31 is reliably fixed on the lower shaft 1. Of course, the fixing method of the active bevel gear 31 is not limited to this, for example, it can also be a shaft end retaining ring.

[0045] The swing end of the branching plate 2 is provided with a branching groove 22 and the supporting end is provided with a guide hole 23. An axial screw 24 is inserted into the guide hole 23. The axial screw 24 is fixedly arranged. The guide hole 23 is used to guide the branching plate 2 to swing with the axial screw 24 as the swing fulcrum. The axial screw 24 can be fixed on the casing. The guide hole 23 is specifically a waist-shaped hole, which reserves a movable space for the swing of the branching plate 2. The neck of the axial screw 24 is integrally formed with a guide column 241, and the guide column 241 is slidably matched with the guide hole 23. The diameter of the guide column 241 is equal to the width of the guide hole 23, and the outer diameter of the guide column 241 is larger than the diameter of the axial screw 24, so that the axial screw 24 is more wear-resistant, which is beneficial to extend the service life of the axial screw 24. Of course, the fixing method of the supporting end of the branching plate 2 is not limited to this.

[0046] The embodiment of the utility model also discloses a chain button sewing machine, which includes the above-mentioned line dividing mechanism and has the same beneficial effects.

[0047] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0048] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A line splitting mechanism, characterized in that: include: A rotatably arranged lower shaft (1); A line dividing plate (2) whose supporting end is slidably arranged along the axial direction of the lower shaft (1); A bevel gear set (3) disposed between the lower shaft (1) and the dividing plate (2); The bevel gear set (3) is provided with an eccentric rotating shaft (321), the eccentric rotating shaft (321) is fixedly connected to the line dividing plate (2), and the bevel gear set (3) is used to drive the swing end of the line dividing plate (2) to swing along a spindle-shaped trajectory through the eccentric rotating shaft (321).

2. The line splitting mechanism according to claim 1, characterized in that: The bevel gear set (3) comprises a driving bevel gear (31) fixedly sleeved on the lower shaft (1) and a driven bevel gear (32) rotatably arranged, the driving bevel gear (31) meshing with the driven bevel gear (32); the eccentric rotating shaft (321) is fixedly arranged on the large diameter end of the driven bevel gear (32).

3. The line splitting mechanism according to claim 2, characterized in that: A supporting shaft (322) is fixedly provided at the large diameter end of the driven bevel gear (32), and a slewing bearing (323) is provided on the outer sleeve of the supporting shaft (322). The outer ring of the slewing bearing (323) is fixedly provided, and the slewing bearing (323) is used to support the rotation of the driven bevel gear (32); the supporting shaft (322) and the driven bevel gear (32) are coaxially arranged, and the eccentric shaft (321) is integrally fixedly provided at one end of the supporting shaft (322) away from the driven bevel gear (32), and the central axis of the eccentric shaft (321) is arranged to deviate from the central axis of the supporting shaft (322).

4. The line splitting mechanism according to claim 2, characterized in that: The line dividing plate (2) is provided with a fixing through hole (21), and the eccentric rotating shaft (321) is matched with the fixing through hole (21) and the two are interference connected.

5. The line splitting mechanism according to claim 2, characterized in that: A connecting key is provided between the active bevel gear (31) and the lower shaft (1), and the connecting key is used to drive the active bevel gear (31) to rotate synchronously with the lower shaft (1).

6. The line splitting mechanism according to claim 5, characterized in that: The active bevel gear (31) is provided with a locking hole, the locking hole is equipped with a locking screw, and the locking screw abuts against the lower shaft (1).

7. The line splitting mechanism according to any one of claims 1 to 4, characterized in that: The swing end is provided with a line dividing groove (22) and the support end is provided with a guide hole (23), an axial screw (24) is passed through the guide hole (23), the axial screw (24) is fixedly arranged, and the guide hole (23) is used to guide the line dividing plate (2) to swing with the axial screw (24) as a swing fulcrum.

8. The line splitting mechanism according to claim 7, characterized in that: A guide column (241) is integrally formed on the neck of the axial screw (24), and the guide column (241) is slidably matched with the guide hole (23), and the diameter of the guide column (241) is equal to the width of the guide hole (23).

9. The line splitting mechanism according to claim 7, characterized in that: The guide hole (23) is specifically a waist-shaped hole.

10. A chain button sewing machine, characterized in that: It comprises the line dividing mechanism as described in any one of claims 1 to 9.

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