Dual-purpose shuttle oil supply device

Abstract

The utility model provides a dual-purpose rotating shuttle oil supply device. The utility model mainly solves the problem that the single piston oil supply mechanism cannot meet the demand of adjusting the oil amount of the rotating shuttle under different working conditions. The utility model is characterized in that the piston oil supply mechanism and the spiral oil supply mechanism are arranged between the shaft sleeve and the main shaft. The utility model has the advantages that the utility model provides a dual-purpose rotating shuttle oil supply device, which has two sets of oil supply systems to meet different demands. Furthermore, the mounting plate of the piston mechanism is arranged on the shaft sleeve instead of the support, which is convenient for adjustment. The adjusting valve with the oil amount adjusting mechanism is arranged outside, which is convenient for operation.

Description

Technical Field

[0001] This invention belongs to the field of sewing machines, and specifically relates to a dual-purpose rotary hook oil supply device. Background Technology

[0002] The rotary hook is an important component of a sewing machine. In short, its working principle is that when the needle moves up and down, it catches the thread and guides the thread to form a stitch. Since the rotary hook needs to rotate twice for every one up and down movement of the needle, it needs to be well lubricated to maintain the normal working condition of the sewing machine under long-term high-speed operation. Too much oil will contaminate the fabric, while too little oil will damage the rotary hook.

[0003] Current rotary hook oil supply devices have various defects: 1) For example, they only have a single piston oil supply mechanism, and the amount of oil supplied varies at different speeds, which can easily cause contamination of the fabric or damage to the rotary hook.

[0004] 2) The piston receiving groove of its piston oil supply mechanism is set on the support, which makes it difficult to adjust the gap between the rotary hook and the needle;

[0005] 3) The regulating valve of the piston oil supply mechanism is located inside the support, which makes adjustment inconvenient. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention provides a dual-purpose rotary hook oil supply device, which mainly solves the problem that it is not possible to simultaneously meet the adjustment requirements according to the amount of oil in the rotary hook under different garment processing conditions.

[0007] The technical solution adopted in this invention is:

[0008] A dual-purpose rotary hook oil supply device includes a support and a main shaft rotatably mounted on the support. A bushing is fitted over the main shaft, and a synchronously rotating rotary hook is located at the front end of the main shaft. A piston oil supply mechanism and a spiral oil supply mechanism are provided between the bushing and the main shaft. The piston oil supply mechanism includes a piston pump mechanism and a first oil inlet on the bushing. A first oil delivery channel corresponding to the rotary hook is provided inside the main shaft, and lubricating oil enters from the first oil inlet and passes through the piston pump mechanism into the first oil delivery channel. The spiral oil supply mechanism includes a second oil inlet on the bushing, and a spirally arranged second oil delivery channel is provided on the outer wall of the main shaft. The second oil delivery channel communicates with the second oil inlet, and the front end of the second oil delivery channel corresponds to the rotary hook.

[0009] The main shaft has a groove on its circumferential outer wall, the bushing has a receiving groove, a piston is provided in the receiving groove, the top of the piston is corresponding to the groove, and the bottom of the piston has an elastic element.

[0010] The outer wall of the bushing can also be detachably connected to a mounting plate, and the bottom of the elastic element abuts against the mounting plate.

[0011] The outer wall of the spindle is provided with a through groove, and the bushing is provided with a central groove for the spindle to pass through in the axial direction. The central groove and the through groove are connected by a channel.

[0012] The bushing has an annular cavity that communicates with the second oil inlet. An oil line is provided in the annular cavity. One end of the oil line is corresponding to the second oil inlet, and the other end is sleeved on the main shaft and corresponding to the second oil delivery channel.

[0013] One end of the bushing is provided with a mounting groove, and a first bearing is provided in the mounting groove. The first bearing is located between the inner wall of the bushing and the outer wall of the main shaft.

[0014] The rotary shuttle includes a rotary shuttle shell, and a contact surface corresponding to the second oil delivery channel is provided at the rear end of the rotary shuttle shell. An oil passage hole is provided on the contact surface, and an oil outlet hole is provided at the eccentric position of the front end face of the rotary shuttle shell. The oil passage hole is connected to the oil outlet hole.

[0015] The support includes a mounting hole, the main shaft portion is disposed in the mounting hole, and a second bearing sleeved on the outside of the main shaft is disposed in the mounting hole.

[0016] The bushing is provided with a first oil seal and a second oil seal that are sealed together, and the through groove, receiving groove and channel are located between the first oil seal and the second oil seal.

[0017] The main shaft is provided with a rotary shuttle sleeve and an oil guide sleeve. A limiting groove for placing the oil line groove is provided between the axial surfaces of the oil guide sleeve and the rotary shuttle sleeve.

[0018] It also includes an oil volume regulating mechanism, which includes an oil limiting core located at the tail end of the first oil delivery channel and a regulating valve located on the outer wall of the support. The oil limiting core has an outlet corresponding to the rotary shuttle. The outer wall of the bushing has an oil outlet pipe connected to the regulating valve. One end of the oil outlet pipe is connected to the channel. An oil inlet pipe is connected to the regulating valve and is connected to the first oil inlet.

[0019] The beneficial effects of the present invention are as follows: The present invention provides a dual-purpose rotary hook oil supply device, which has at least the following advantages:

[0020] 1) It has two oil supply systems to meet different needs;

[0021] 2) The mounting plate of the piston mechanism is located on the bushing instead of the support, which facilitates adjustment;

[0022] 3) The regulating valve with oil quantity adjustment mechanism is externally located for easy operation. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0024] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention.

[0025] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0026] Figure 4 This is a partial three-dimensional schematic diagram of an embodiment of the present invention.

[0027] Figure 5 This is a partial cross-sectional view of an embodiment of the present invention.

[0028] Figure 6 This is a three-dimensional schematic diagram of the spindle according to an embodiment of the present invention.

[0029] Figure 7 This is a cross-sectional schematic diagram of the spindle according to an embodiment of the present invention.

[0030] Figure 8 This is a three-dimensional schematic diagram of a rotary hook according to an embodiment of the present invention.

[0031] Figure 9 This is a three-dimensional schematic diagram of a rotary hook according to an embodiment of the present invention.

[0032] Figure 10 This is a partial cross-sectional view of an embodiment of the present invention. Detailed Implementation

[0033] The invention will be further described below with reference to the accompanying drawings: As shown in the figures, a dual-purpose rotary hook oil supply device includes a support 1 and a main shaft 2 rotatably mounted on the support. A bushing 3 is fitted over the main shaft, and a synchronously rotating rotary hook 4 is provided at the front end of the main shaft. A piston oil supply mechanism and a spiral oil supply mechanism are provided between the bushing and the main shaft. The piston oil supply mechanism includes a piston pump mechanism and a first oil inlet 40 provided on the bushing. A first oil delivery channel 21 corresponding to the rotary hook is provided inside the main shaft. Lubricating oil enters from the first oil inlet and passes through the piston pump mechanism into the first oil delivery channel. The spiral oil supply mechanism includes a second oil inlet 51 provided on the bushing. A spirally arranged second oil delivery channel 52 is provided on the outer wall of the main shaft. The second oil delivery channel communicates with the second oil inlet, and the front end of the second oil delivery channel 52 is corresponding to the rotary hook. Two oil inlet options are provided to meet different usage needs. It is highly versatile. Oil can be supplied from the first oil inlet and then through the first oil delivery channel inside the main shaft to the rotary hook. Alternatively, oil can be supplied from the second oil inlet and through the second oil delivery channel on the outer wall of the main shaft to the rotary hook.

[0034] In this embodiment, as shown in the figure, the outer circumferential wall of the main shaft is provided with a groove 22, the bushing is provided with a receiving groove 31, and a piston 32 is provided in the receiving groove. The top of the piston is correspondingly arranged with the groove, and the bottom of the piston is provided with an elastic element 33. When the main shaft rotates, the piston 32 and the groove realize piston-type oil pumping and guide the oil into the channel 35.

[0035] In this embodiment, as shown in the figure, a mounting plate 34 can be detachably connected to the outer wall of the bushing, and the bottom of the elastic element abuts against the mounting plate. This mounting plate is directly mounted on the bushing instead of the support, allowing for easy adjustment and making it more convenient to use.

[0036] In this embodiment, as shown in the figure, the outer wall of the main shaft is provided with a through groove 23, and the bushing is axially provided with a central groove 38 for the main shaft to pass through. The central groove and the through groove are connected by a channel 35. The lubricating oil flowing out of the channel enters the main shaft through the through groove and then flows to the rotary hook.

[0037] In this embodiment, as shown in the figure, the bushing has an annular cavity 36 communicating with the second oil inlet. An oil line 37 is provided within the annular cavity. One end of the oil line corresponds to the second oil inlet, and the other end is sleeved on the main shaft and corresponds to the second oil delivery channel. Through the capillary action of the oil line, the oil from the second oil inlet is adsorbed onto the outer wall of the main shaft, and then the rotation of the main shaft achieves forward delivery of lubricating oil, resulting in a smoother delivery.

[0038] In this embodiment, as shown in the figure, an oil volume regulating mechanism is also included. This mechanism includes an oil limiting core 81 located at the tail end of the first oil delivery channel and a regulating valve 82 located on the outer wall of the support. The oil limiting core has an outlet 811 corresponding to the rotary hook. The outer wall of the bushing has an oil outlet pipe 83 connected to the regulating valve. One end of the oil outlet pipe is connected to the channel. An oil inlet pipe 84 is connected to the regulating valve and is connected to the first oil inlet. The connection between the oil inlet pipe and the first oil inlet can be direct or through an intermediate oil storage chamber. The regulating valve is located outside the housing for easy adjustment. After the oil reaches the channel, it branches into two paths: one enters the main shaft, and the other enters the oil outlet pipe. By adjusting the flow rate of the oil outlet pipe, the oil pressure entering the main shaft can be indirectly adjusted. Furthermore, the main shaft contains an oil limiting core, which is existing technology. Specifically, a certain oil pressure is required for the oil to pass through the rotary hook, thereby allowing for better regulation of the oil flow.

[0039] In this embodiment, as shown in the figure, one end of the bushing is provided with a mounting groove 30, and a first bearing 301 is provided in the mounting groove. The first bearing is located between the inner wall of the bushing and the outer wall of the spindle, thereby supporting the spindle.

[0040] In this embodiment, as shown in the figure, the rotary shuttle includes a rotary shuttle housing 41. The rear end of the rotary shuttle housing has a contact surface 411 corresponding to the second oil delivery channel. An oil passage hole 412 is provided on the contact surface. An oil outlet hole 413 is provided at the eccentric position of the front end of the rotary shuttle housing, and the oil passage hole communicates with the oil outlet hole. Lubricating oil reaches the contact surface through the second delivery channel. Furthermore, an oil guide sleeve is provided on the outer wall of the main shaft, located outside the second delivery channel. The front end of the oil guide sleeve faces the contact surface. After entering the oil passage hole, the lubricating oil enters the oil outlet hole at the eccentric position of the rotary shuttle housing, achieving lubrication. Preferably, the oil guide sleeve includes a boss 731, and the rotary shuttle housing has a groove 4101. The contact surface is located within the groove, and the boss extends into the groove and is correspondingly positioned to the contact surface, allowing the lubricating oil to enter and be placed in the gap 4102 between the two. The base 732 is then provided, and the front end of the base contacts (preferably in a sealed manner) the outer wall of the rotary shuttle housing to prevent lubricating oil leakage.

[0041] In this embodiment, as shown in the figure, the support includes a mounting hole 11, the main shaft portion is disposed in the mounting hole, and a second bearing 111 sleeved on the outside of the main shaft is provided in the mounting hole.

[0042] In this embodiment, as shown in the figure, the bushing is provided with a first oil seal 61 and a second oil seal 62 that are sealed together. The through groove 23, the receiving groove 31, and the channel 35 are located between the first oil seal and the second oil seal. This reduces leakage points and improves the performance.

[0043] In this embodiment, as shown in the figure, a rotary hook sleeve 71 and an oil guide sleeve 72 are provided outside the main shaft. A limiting groove 73 for placing the oil line groove is provided between the axial surfaces of the oil guide sleeve and the rotary hook sleeve. This limits the oil line, resulting in better performance.

[0044] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention. The embodiments should not be considered as limiting the invention, but any improvements made based on the spirit of the invention should be within the scope of protection of the invention.

Claims

1. A dual-purpose rotary hook oil supply device, comprising a support (1) and a main shaft (2) rotatably mounted on the support, wherein a bushing (3) is fitted over the main shaft, and a synchronously rotating rotary hook (4) is provided at the front end of the main shaft, characterized in that: A piston oil supply mechanism and a spiral oil supply mechanism are arranged between the shaft sleeve and the main shaft, The piston oil supply mechanism comprises a piston pump mechanism and a first oil inlet (40) arranged on the shaft sleeve, and a first oil delivery channel (21) corresponding to the rotating hook is arranged in the main shaft, and lubricating oil enters the first oil delivery channel from the first oil inlet through the piston pump mechanism; The spiral oil supply mechanism comprises a second oil inlet (51) arranged on the shaft sleeve, and a second oil delivery channel (52) is arranged in a spiral manner on the outer wall of the main shaft, the second oil delivery channel is in communication with the second oil inlet, and the front end of the second oil delivery channel (52) is arranged corresponding to the rotating hook; An annular cavity (36) in communication with the second oil inlet is arranged in the shaft sleeve, and an oil line (37) is arranged in the annular cavity, one end of the oil line is arranged corresponding to the second oil inlet, and the other end of the oil line is arranged on the main shaft and arranged corresponding to the second oil delivery channel; One end of the shaft sleeve is provided with a mounting groove (30), and a first bearing (301) is arranged in the mounting groove and between the inner wall of the shaft sleeve and the outer wall of the main shaft; The rotating hook comprises a rotating hook shell (41), a contact surface (411) corresponding to the second oil delivery channel is arranged at the rear end of the rotating hook shell, an oil passing hole (412) is arranged on the contact surface, an oil outlet hole (413) is arranged at the eccentric position of the front end surface of the rotating hook shell, and the oil passing hole is in communication with the oil outlet hole; The outer wall of the main shaft is further provided with a guide sleeve which is arranged outside the second delivery channel, and the front end surface of the guide sleeve is opposite to the contact surface.

2. A dual purpose oil supply device for a rotary hook as defined in claim 1, characterized in that: A groove (22) is arranged on the circumferential outer wall of the main shaft, a containing groove (31) is arranged on the shaft sleeve, a piston (32) is arranged in the containing groove, the top of the piston is arranged corresponding to the groove, and the bottom of the piston is provided with an elastic member (33).

3. A dual purpose oil supply device for a rotary hook as defined in claim 2, characterized in that: The outer wall of the shaft sleeve is further detachably connected with a mounting plate (34), and the bottom of the elastic member is pressed against the mounting plate.

4. A dual purpose oil supply device for a rotary hook as defined in claim 3, characterized in that: The outer wall of the main shaft is provided with a through groove (23), the shaft sleeve is axially provided with a central groove (38) for the main shaft to pass through, and the central groove and the through groove are in communication through a channel (35).

5. A dual purpose oil supply device for a rotary hook as defined in claim 4, characterized in that: The oil amount adjusting mechanism comprises a limiting oil core (81) arranged at the tail end of the first oil delivery channel and an adjusting valve (82) arranged on the outer wall of the support, an outlet (811) corresponding to the rotating hook is arranged on the limiting oil core, an oil outlet pipe (83) in communication with the adjusting valve is arranged on the outer wall of the shaft sleeve, one end of the oil outlet pipe is in communication with the channel, an oil inlet pipe (84) is connected to the adjusting valve, and the oil inlet pipe is in communication with the first oil inlet.

6. A dual purpose oil supply device for a rotary hook as defined in claim 5, characterized in that: The support comprises a mounting hole (11), and the main shaft is arranged in the mounting hole, and a second bearing (111) is arranged on the outer wall of the main shaft and sleeved on the main shaft.

7. A dual purpose oil supply device for a rotary hook as defined in claim 6, characterized in that: The shaft sleeve is provided with a first oil seal (61) and a second oil seal (62) in sealing cooperation, and the through groove (23), the containing groove (31) and the channel (35) are arranged between the first oil seal and the second oil seal.

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