A tool for processing a needle bar hole of a machine head of a sewing machine

Abstract

The utility model provides a kind of tool for overlock machine head needle bar hole processing, including bottom plate, be set on the inclined surface of bottom plate and top surface and adjust hole pad block for placing head shell are adjusted to hole table, the inclined surface of adjust hole table is set on and is used to place the adjust hole pad block of head shell, clamp seat is set on the inclined surface of adjust hole table, right limit shaft is set on clamp seat and with baffle resistance, right limit shaft end face towards clamp seat is provided with the positioning shaft that passes through first main shaft hole and second main shaft hole simultaneously and with first main shaft hole and second main shaft hole gap cooperation.When head shell is placed on the top surface of two adjust hole pad blocks, the needle bar hole of head shell is clamped and positioned into vertical needle bar hole, and reamer for feeding conveniently up and down is reamed to process.

Description

Technical Field

[0001] This utility model relates to the technical field of machining overlock sewing machine heads, and in particular to a tooling for machining the needle bar hole of an overlock sewing machine head. Background Technology

[0002] An overlock sewing machine is an industrial sewing equipment mainly used for overlocking, sealing, and binding edges of fabrics such as clothing and knitwear. Its core functions include preventing fabric frayed edges and reinforcing the fabric seams.

[0003] like Figure 1 As shown, a sewing machine head housing 1 includes a head housing 1 with a housing cavity 2. A partition 3 with a first spindle hole 4 is fixedly connected inside the housing cavity 2 of the head housing 1. The head housing 1 has a groove 5 aligned with the first spindle hole 4 and a second spindle hole 6 sequentially formed from the outside to the inside. The first spindle hole 4 and the second spindle hole 6 are circular holes with the same diameter. The groove 5 is a circular groove with a diameter larger than the second spindle hole 6. A needle bar hole 7 with a downward inclination is formed on the top surface of the head housing 1.

[0004] Since the needle bar hole 7 of the overlock sewing machine head is the core component for installing the needle bar, its machining accuracy directly affects the stability of the sewing stitch. Therefore, it is usually necessary to ream the needle bar hole 7 of the overlock sewing machine head. Reaming is a method of removing a small amount of metal layer from the hole wall of the needle bar hole 7 of the overlock sewing machine head using a reamer to improve the dimensional accuracy and surface quality of the needle bar hole 7.

[0005] The existing technical solution mentioned above has the following defects: the needle bar hole 7 of the overlock sewing machine head is not set perpendicular to the horizontal plane. Therefore, when using a reamer to ream the needle bar hole 7, the reamer fed up and down has difficulty reaming the inclined needle bar hole 7. Therefore, a tooling fixture needs to be set to position the inclined needle bar hole 7 as a vertical needle bar hole 7, so as to facilitate the reamer fed up and down to ream the hole. Utility Model Content

[0006] The present invention aims to address the aforementioned deficiencies in the prior art by providing a tooling for machining needle bar holes in an overlock sewing machine head, which solves the problem of inconvenient machining of inclined needle bar holes in the prior art.

[0007] The above-mentioned utility model objective is achieved through the following technical solution: a tooling for processing the needle bar hole of an overlock sewing machine head, comprising a base plate, an adjusting table disposed on the base plate with an inclined top surface, an adjusting pad disposed on the inclined surface of the adjusting table for placing the machine head housing, a clamping seat disposed on the inclined surface of the adjusting table, and a right limiting shaft disposed on the clamping seat and abutting against a partition plate, wherein the end face of the right limiting shaft facing the clamping seat is provided with a positioning shaft that passes through the first spindle hole and the second spindle hole and is clearance-fitted with the first spindle hole and the second spindle hole.

[0008] The present invention is further configured such that: a push plate groove is provided on the end face of the positioning shaft away from the right limiting shaft; a guide plate groove and a guide post hole communicating with the push plate groove are sequentially provided inward on the axial surface of the positioning shaft; a left limiting plate is slidably disposed in the guide plate groove and abuts against the bottom of the groove; a push post is provided on the end face of the left limiting plate facing the push plate groove; the end face of the push post away from the left limiting plate is inclined towards the left limiting plate; a push plate slide post is slidably disposed in the push plate groove; and the push plate slide post has a guide surface that is inclined towards the center of the push plate slide post and abuts against the inclined surface of the push post.

[0009] The present invention is further configured such that: an installation groove is provided on the bottom of the guide plate groove, an installation post is provided on the left limiting plate to be inserted into the installation groove, and a reset tension spring is provided between the installation post and the bottom of the installation groove.

[0010] The present invention is further configured such that: a pressure cap is provided at one end of the push plate slide column extending out of the push plate column groove, a guide rod hole is provided on the pressure cap along the thickness direction of the pressure cap, and a guide screw is provided on the end face of the positioning shaft facing the pressure cap, which passes through the guide rod hole and slides in cooperation with the guide rod hole.

[0011] The present invention is further configured such that: after the guide screw passes through the guide rod hole, a locking nut is threadedly connected to the end face of the pressure cap that abuts against the positioning shaft.

[0012] The present invention is further configured such that: a return spring is sleeved on the guide screw for pushing the pressure cap to move away from the positioning axis.

[0013] The present invention is further configured such that: a fixed post hole is provided on the end face of the push post facing the pressure cover; a guide bar sliding hole communicating with the guide post hole is provided on the end face of the positioning shaft facing the pressure cover; and a fixed post insert is provided on the end face of the pressure cover facing the positioning shaft, which slides with the guide bar sliding hole and is inserted into the fixed post hole.

[0014] The present invention is further configured such that: a locking pin slot is provided on the end face of the positioning shaft facing the pressure cover, and a locking pin plug is provided on the end face of the pressure cover facing the positioning shaft, which is inserted into the locking pin slot.

[0015] The present invention is further configured such that: the axial surface of the positioning shaft is provided with a disassembly and assembly locking hole and a locking component locking hole communicating with the locking pin slot; the disassembly and assembly locking hole is located on the side of the locking component locking hole near the pressure cover; a locking groove is provided on the outer end face of the locking pin insert; a locking pin locking buckle is slidably disposed in the locking groove and engages with the disassembly and assembly locking hole and the locking component locking hole; and a top locking spring is provided between the locking pin locking buckle and the bottom of the locking groove for pushing the locking pin locking buckle to slide out of the locking groove.

[0016] In summary, the beneficial technical effects of this utility model are as follows:

[0017] (1) When the machine head housing is placed on the top surface of the two adjusting pads, the inclined needle bar hole on the machine head housing is clamped and positioned as a vertical needle bar hole, which facilitates the reamer to perform reaming. The pads are set between the machine head housing and the adjusting table to raise the machine head housing and create space between the bottom of the machine head housing and the adjusting table, which facilitates the reamer to perform through processing and prevents the reamer from colliding with the adjusting table.

[0018] (2) The tooling for machining the needle bar hole of the overlock sewing machine head restricts the vertical movement of the machine head shell by means of the adjustment pad and the positioning shaft, and restricts the horizontal movement of the machine head shell by means of the right limit shaft and the left limit plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the outer shell of an overlock sewing machine head in the prior art;

[0020] Figure 2 This is a schematic diagram of the tooling for machining the needle bar hole of the overlock sewing machine head in this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of the positioning shaft in this utility model;

[0022] Figure 4 This is a partial structural diagram of the end of the positioning shaft in this utility model;

[0023] Figure 5 This is a cross-sectional view of the positioning axis from the first perspective in this utility model;

[0024] Figure 6 This is a cross-sectional view of the positioning axis from a second perspective in this utility model;

[0025] Figure 7 This is a schematic diagram of the structure of each component on the positioning shaft in this utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the outer shell of the overlock sewing machine head and the tooling for machining the needle bar hole of the overlock sewing machine head in this utility model.

[0027] In the above figures: 1. Machine head housing; 2. Housing cavity; 3. Partition plate; 4. First spindle hole; 5. Groove; 6. Second spindle hole; 7. Needle bar hole; 8. Base plate; 9. Adjusting table; 10. Adjusting pad; 11. Fixture seat; 12. Right limit shaft; 13. Positioning shaft; 14. Push plate column groove; 15. Guide plate slide groove; 16. Guide column hole; 17. Mounting groove; 18. Left limit plate; 19. Mounting column; 20. Reset. 21. Tension spring; 22. Push post; 23. Push plate slide post; 24. Guide surface; 25. Pressure cap; 26. Guide rod hole; 27. Guide screw; 28. Locking cap nut; 29. ​​Return spring; 20. Fixed post hole; 31. Guide bar slide hole; 32. Fixed post insert; 33. Locking post slot; 34. Locking post insert block; 35. Snap-on groove; 36. Locking post snap-on; 37. Top snap-on spring. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] like Figure 2 As shown, this utility model proposes a tooling for machining the needle bar hole of an overlock sewing machine head, including a base plate 8, a hole adjusting table 9, a hole adjusting pad 10, a clamping seat 11, a right limiting shaft 12, and a positioning shaft 13.

[0030] like Figure 2 As shown, in this embodiment, the base plate 8 is a rectangular plate, and the base plate 8 is fixedly installed on the base of the reaming machine by screws.

[0031] like Figure 2 As shown, in this embodiment, the adjusting platform 9 is screwed onto the base plate 8. The cross-section of the adjusting platform 9 is a right trapezoid, and the top surface of the adjusting platform 9 is an inclined surface. Two adjusting pads 10 are screwed onto the inclined surface of the adjusting platform 9, and the machine head housing 1 is placed on the top surface of the two adjusting pads 10.

[0032] When the machine head housing 1 is placed on the top surface of the two adjusting pads 10, the inclined needle bar hole 7 on the machine head housing 1 is clamped and positioned as a vertical needle bar hole 7, which facilitates the reamer to perform reaming. In addition, the pads are set between the machine head housing 1 and the adjusting table 9 to raise the machine head housing 1 and create space between the bottom of the machine head housing 1 and the adjusting table 9, which facilitates the reamer to perform through processing and prevents the reamer from colliding with the adjusting table 9.

[0033] like Figure 2 and 8As shown, the fixture base 11 is fixedly installed on the inclined surface of the adjusting table 9, and a cylindrical right limiting shaft 12 is fixedly connected to the side wall of the fixture base 11. When the machine head housing 1 is clamped on the tooling for processing the needle bar hole of the overlock sewing machine, the right limiting shaft 12 abuts against the end face of the partition plate 3 facing the right limiting shaft 12.

[0034] like Figure 2 and 8 As shown, the positioning shaft 13 is coaxially fixed to the end face of the right limiting shaft 12 away from the fixture seat 11. The positioning shaft 13 passes through the first spindle hole 4 and the second spindle hole 6 at the same time. The positioning shaft 13 is clearance-fitted with the first spindle hole 4 and the second spindle hole 6. The positioning shaft 13 cooperates with the two adjusting hole pads 10 to limit the vertical movement of the machine head housing 1.

[0035] like Figure 4 and 5 As shown, a push plate groove 14 is provided at the center of the end face of the positioning shaft 13 away from the right limiting shaft 12, and the cross-section of the push plate groove 14 is circular. Three guide plate grooves 15 are provided equidistantly on the outer wall of the positioning shaft 13. Each guide plate groove 15 has a guide post hole 16 communicating with the push plate groove 14 on the bottom of the groove. A pair of mounting grooves 17 are symmetrically provided on the bottom of each guide plate groove 15, and the two mounting grooves 17 are symmetrically distributed on both sides of the guide post hole 16.

[0036] like Figure 5 As shown, each guide plate groove 15 has a left limiting plate 18 slidably disposed therein, which can abut against the bottom of the groove 5. Each left limiting plate 18 has a pair of cylindrical mounting posts 19 symmetrically disposed on the end face facing the mounting groove 17. The mounting posts 19 are inserted into the mounting groove 17. A reset spring 20 is disposed between the mounting post 19 and the bottom of the mounting groove 17. One end of the reset spring 20 is fixedly connected to the bottom of the mounting groove 17, and the other end is fixedly connected to the mounting post 19. The reset spring 20 pulls the left limiting plate 18 toward the center of the positioning shaft 13 through the mounting post 19.

[0037] like Figure 6 and 7 As shown, each left limiting plate 18 has a push-receiving column 21 fixedly connected to its end face facing the push plate column groove 14. The push-receiving column 21 is slidably engaged with the guide column hole 16. The end face of the push-receiving column 21 away from the left limiting plate 18 is inclined towards the left limiting plate 18.

[0038] like Figure 6 and 7As shown, a push plate slide column 22 is slidably arranged in the push plate column groove 14. The push plate slide column 22 has three guide surfaces 221 that are equidistantly distributed in a circle. The three guide surfaces 221 are respectively arranged corresponding to the three push columns 21. The guide surfaces 221 are inclined towards the center of the push plate slide column 22. The guide surfaces 221 abut against the inclined surfaces of the push columns 21 that are away from the left limit plate 18.

[0039] like Figure 3 and 6 As shown, a pressure cap 23 is fixedly connected to one end of the push plate slide column 22 that extends out of the push plate column groove 14. Three guide rod holes 24 are equidistantly arranged on the pressure cap 23 along its thickness direction. The guide rod holes 24 are circular holes. Three guide screws 25 are fixedly connected to the end face of the positioning shaft 13 facing the pressure cap 23. The three guide screws 25 are equidistantly distributed circumferentially. The end of the guide screw 25 away from the positioning shaft 13 passes through the guide rod hole 24. The guide screw 25 slides in contact with the guide rod hole 24, so the pressure cap 23 can reciprocate linearly away from or towards the positioning shaft 13 relatively stably.

[0040] like Figure 3 and 6 As shown, the guide screw 25 passes through the guide rod hole 24 and is threadedly connected to the locking nut 26. The locking nut 26 abuts against the end face of the pressure cover 23 away from the positioning shaft 13, which can restrict the separation of the pressure cover 23 from the guide screw 25 and also limit the range of motion of the pressure cover 23.

[0041] like Figure 3 and 6 As shown, a return spring 27 is sleeved on the guide screw 25. One end of the return spring 27 abuts against the end face of the pressure cover 23 facing the positioning shaft 13, and the other end abuts against the end face of the positioning shaft 13 facing the pressure cover 23. The return spring 27 is used to push the pressure cover 23 to move away from the positioning shaft 13.

[0042] like Figure 3 and 6 As shown, a fixed post hole 28 is provided on the end face of the push post 21 facing the pressure cap 23. The cross-section of the fixed post hole 28 is triangular, and the small end of the fixed post hole 28 faces the center of the push post 21. Three guide bar sliding holes 29 are provided at equal intervals around the end face of the positioning shaft 13 facing the pressure cap 23. The three guide bar sliding holes 29 are respectively connected to the three guide post holes 16. Three fixed post inserts 30 are fixedly connected to the end face of the pressure cap 23 facing the positioning shaft 13. The bottom of the fixed post insert 30 is pointed and can be inserted into the fixed post hole 28. The three fixed post inserts are respectively inserted into the three guide bar sliding holes 29, and the fixed post inserts slide in cooperation with the guide bar sliding holes 29.

[0043] like Figure 3 and 6As shown, three locking pin slots 31 are equidistantly arranged on the end face of the positioning shaft 13 facing the pressure cover 23. The locking pin slots 31 are rectangular slots, with the end of the locking pin slot 31 closer to the center of the positioning shaft 13 being the inner end and the end of the locking pin slot 31 farther from the center of the positioning shaft 13 being the outer end. The inner end of the locking pin slot 31 communicates with the push plate slot 14. The axial surface of the positioning shaft 13 has a disassembly and assembly hole 32 and a locking component hole 33, both of which are circular holes and communicate with the locking pin slots 31. The disassembly and assembly hole 32 is located on the side of the locking component hole 33 closer to the pressure cover 23.

[0044] like Figure 3 and 6 As shown, three locking pin blocks 34 are equidistantly circumferentially fixed on the end face of the pressure cover 23 facing the positioning shaft 13. The locking pin blocks 34 are rectangular blocks. The end of the locking pin block 34 closer to the center of the pressure cover 23 is the inner end, and the end of the locking pin block 34 away from the center of the pressure cover 23 is the outer end. The inner end of the locking pin block 34 is fixedly connected to the push plate slide pin 22. The three locking pin blocks 34 are respectively inserted into the three locking pin slots 31.

[0045] like Figure 3 and 6 As shown, a circular cross-section latch groove 35 is formed on the outer end face of one of the locking pin inserts 34. A locking pin latch 36 is slidably disposed in the latch groove 35, and the end of the locking pin latch 36 facing away from the bottom of the latch groove 35 is bullet-shaped. A top latch spring 37 is provided between the locking pin latch 36 and the bottom of the latch groove 35. One end of the top latch spring 37 is fixedly connected to the locking pin latch 36, and the other end is fixedly connected to the bottom of the latch groove 35. The top latch spring 37 is used to push the locking pin latch 36 to slide out of the latch groove 35 and into the disassembly and assembly latch hole 32 or the lock component latch hole 33.

[0046] The detailed working process of this embodiment is as follows:

[0047] S1: The worker places the machine head housing 1 on the top surface of the two adjusting hole pads 10, and at the same time passes the positioning shaft 13 through the first main shaft hole 4 and the second main shaft hole 6 until the right limit shaft 12 abuts against the end face of the partition 3 facing the right limit shaft 12. At this time, the machine head housing 1 is restricted from moving vertically.

[0048] S2: The worker presses the locking pin buckle 36, causing the locking pin buckle 36 to be pulled out of the disassembly and assembly hole 32 and retracted into the buckle groove 35. Then, the worker pushes the push plate slide 22 towards the right limit shaft 12 by pressing the pressure cover 23. Since the guide surface 221 of the push plate slide 22 is inclined towards the center of the push plate slide 22, the guide surface 221 of the push plate slide 22 abuts against the inclined surface of the push column 21 away from the left limit plate 18. At the same time, the end of the push column 21 away from the left limit plate 18 is inclined towards the left limit plate 18. Therefore, the movement of the push plate slide 22 towards the right limit shaft 12 will push the left limit plate 18 out of the guide plate groove 15 and abut against the bottom of the groove 5 through the push column 21.

[0049] At the same time, when the worker presses the cover 23, it will push the lock pin block 34 to move closer to the right limit shaft 12 until the buckle groove 35 of the lock pin block 34 is aligned with the lock part hole 33. The top buckle spring 37 pushes the lock pin buckle 36 to slide out of the buckle groove 35 and into the lock part hole 33. The left limit plate 18 remains in the state of sliding out of the guide plate groove 15 and abutting against the bottom of the groove 5. Through the cooperation of the right limit shaft 12 and the left limit plate 18, the machine head housing 1 is restricted from moving horizontally.

[0050] The tooling for machining the needle bar hole of this overlock sewing machine restricts the vertical movement of the machine head housing 1 through the cooperation of the adjusting pad 10 and the positioning shaft 13, and restricts the horizontal movement of the machine head housing 1 through the cooperation of the right limiting shaft 12 and the left limiting plate 18.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tooling for machining the needle bar hole of an overlock sewing machine head, characterized in that: It includes a base plate (8), an adjustment platform (9) set on the base plate (8) with a sloping top surface, an adjustment pad (10) set on the sloping surface of the adjustment platform (9) and used to place the machine head housing (1), a clamp seat (11) set on the sloping surface of the adjustment platform (9), and a right limiting shaft (12) set on the clamp seat (11) and abutting against the partition plate (3). The end face of the right limiting shaft (12) facing the clamp seat (11) is provided with a positioning shaft (13) that passes through the first spindle hole (4) and the second spindle hole (6) and is clearance-fitted with the first spindle hole (4) and the second spindle hole (6).

2. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 1, characterized in that: The positioning shaft (13) has a push plate groove (14) on its end face away from the right limiting shaft (12). The positioning shaft (13) has a guide plate groove (15) and a guide post hole (16) communicating with the push plate groove (14) in sequence on its axial surface. A left limiting plate (18) that abuts against the bottom of the groove (5) is slidably arranged in the guide plate groove (15). A push post (21) is arranged on the end face of the left limiting plate (18) facing the push plate groove (14). The end face of the push post (21) away from the left limiting plate (18) is inclined toward the left limiting plate (18). A push plate slide post (22) is slidably arranged in the push plate groove (14). The push plate slide post (22) has a guide surface (221) that is inclined toward the center of the push plate slide post (22) and abuts against the inclined surface of the push post (21).

3. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 2, characterized in that: The guide plate groove (15) has an installation groove (17) on its bottom. The left limiting plate (18) has an installation post (19) that is inserted into the installation groove (17). A reset spring (20) is provided between the installation post (19) and the bottom of the installation groove (17).

4. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 2, characterized in that: The end of the push plate slide column (22) extending out of the push plate column groove (14) is provided with a pressure cap (23). The pressure cap (23) is provided with a guide rod hole (24) along the thickness direction of the pressure cap (23). The end face of the positioning shaft (13) facing the pressure cap (23) is provided with a guide screw (25) that passes through the guide rod hole (24) and slides with the guide rod hole (24).

5. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 4, characterized in that: The guide screw (25) passes through the guide rod hole (24) and is threaded to a locking nut (26) that abuts against the end face of the pressure cap (23) away from the positioning shaft (13).

6. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 5, characterized in that: A return spring (27) is fitted on the guide screw (25) for pushing the pressure cap (23) to move away from the positioning axis (13).

7. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 4, characterized in that: The push column (21) has a fixed column hole (28) on its end face facing the pressure cap (23), the positioning shaft (13) has a guide bar sliding hole (29) that communicates with the guide column hole (16) on its end face facing the pressure cap (23), and the pressure cap (23) has a fixed column insert (30) that slides with the guide bar sliding hole (29) and is inserted into the fixed column hole (28) on its end face facing the positioning shaft (13).

8. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 4, characterized in that: The positioning shaft (13) has a locking pin slot (31) on its end face facing the pressure cover (23), and the pressure cover (23) has a locking pin plug (34) that is inserted into the locking pin slot (31) on its end face facing the positioning shaft (13).

9. The tooling for machining the needle bar hole of an overlock sewing machine head according to claim 8, characterized in that: The positioning shaft (13) has a disassembly and assembly hole (32) and a lock part hole (33) that communicate with the lock pin slot (31). The disassembly and assembly hole (32) is located on the side of the lock part hole (33) near the pressure cover (23). The outer end face of the lock pin insert (34) has a buckle groove (35). A lock pin buckle (36) that engages with the disassembly and assembly hole (32) and the lock part hole (33) is slidably disposed in the buckle groove (35). A top buckle spring (37) for pushing the lock pin buckle (36) out of the buckle groove (35) is provided between the lock pin buckle (36) and the bottom of the buckle groove (35).

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