KR940005358B1 - Transmission and balancing mechanism for the workpiece supporting arm of a stitching machine - Google Patents

Abstract

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Description

Power transmission and balancing device for sewing machines

1 is a schematic front view of a sewing machine according to the prior art.

2 is a cross-sectional view of a power transmission and balancing device according to the present invention.

3 is an exploded perspective view of the power transmission device according to the present invention.

4 is an exploded perspective view of the balancing device according to the present invention.

5 is a schematic front view of a sewing machine according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Arm body unit 2: Power transmission unit

3: Round trip unit 4: Balancing unit

5: sewing machine body base 10: base

11: Arm Body 12: Sewing Head

13: Front Cap 14: Connecting Rod

20: drive belt 21: center shaft

22: gear belt 23: gear roller

24: lower power transmission shaft 25: reversible power transmission gear

26: drive plate 27: rotary book

31: sheet 32: bearing

33: drive gear 34: gear belt

35: gear holder 36: upper power transmission shaft

37: reversible power transmission gear 38: transfer plate holder

40: upper shaft 41: upper gear

42: drive belt 43: lower gear

44: camshaft 45: counterweight

46: bearing 47: lower shaft

48: bearing 51: curved groove

52: sewing needle 101: bearing mounting hole

102: inclined hole 104: first chamber

105: second chamber 106: bearing block

111: upper hole 112: lower hole

113: first shrinkage portion 114: second shrinkage portion

121: round groove 122; First shrinkage part

123: second shrinkage portion 131: opening

132: gear chamber 133: protrusion shaft

134: round groove 135: transfer plate

211: variable speed gear set 212: drive gear

232: Drive Gear 233: Universal Joint

241: spherical chuck 251: driving belt

261: support portion 262: gear

351: Drive Gear 353: Universal Joint

361: spherical chuck 381: gearing

The present invention relates to a sewing machine of the present invention, and more particularly, to a power transmission and balancing device for adjusting the position of the work support arm of the sewing machine and the movement of the rotary book.

In general, the sewing machine used in the shoe manufacturing factory is provided with a movable work support arm for supporting the work, and by continuously adjusting the position of the support arm relative to the body of the sewing machine to be able to sew the work continuously. have.

The sewing machine structure of this structure is, as shown in Figure 1, the reciprocating motion of the rotary drum is to be controlled by a power transmission shaft passing through a number of bevel gears, such bevel gears are the assembly process of the device It becomes complicated and generates high noise while the sewing machine is running.

In addition, since the bevel gear has fine teeth while being disposed near the rotary book installed in the sewing head of the work support arm, there is a problem that the sewing needle is easily damaged when the needle is caught in the work.

Accordingly, the present invention has been made to solve the above-mentioned problems, less noise during sewing work, has a balancing means to maintain the balance of the work support arm, the work piece of the sewing machine with excellent durability The object is to provide an arm power transmission and balancing device.

In order to achieve the above object, the present invention, one end is connected to the bearing sheet in the body of the sewing machine in order to control the reciprocating movement of the rotary book and the transfer plate and the position of the workpiece support arm. It is connected to the axis, the other end is connected to the sewing head and the arm body unit is attached to the front cap for supporting the sewing material, and coupled to the interior of the arm body unit is transferred to the rotary book through the drive belt ㆍ The power transmission unit rotates alternately in the rear direction, and is coupled to the arm body unit to rotate the transfer plate holder in the forward and backward direction so that the transfer plate on the transfer plate holder heat forms a straight line with the sewing needle continuously. A balancing unit with a reciprocating unit for connecting a camshaft to balance the movement of the arm body unit. It becomes bait.

In addition, a connecting rod is connected between the bottom end of the arm body unit and the bearing block installed on the shaft of the balancing unit, and the external pressure applied to the sewing head of the arm body unit through the base is supported by the supporting rod. Evenly distributed throughout.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

The power transmission and balancing device of the sewing machine according to the present invention is an arm body unit (1) and a power transmission unit (2), reciprocating, mounted on the sewing machine body base (5) of the sewing machine as shown in FIGS. It is equipped with a unit 3 and a balancing unit 4.

Here, the arm body unit 1 is a base 10 pivoted to the sewing machine body base (5), the arm body (11) extending obliquely while being connected to the base (10), on the arm body (11) Supported sewing head portion 12 and the front cam 13 coupled to the sewing head portion 12, the base 10 is a sewing machine body base by a bearing (to be described in more detail below) ( 5) is formed in an elongate shape in which a bearing mounting hole 101 is formed at one end thereof pivotally coupled thereto, and an obliquely inclined hole 102 is formed at an opposite end portion opposite to the one end portion and opposite to the inclined hole. First and second chambers 104 and 105 are partitioned between the hole 102 and the bearing mounting hole 101.

The arm body 11 includes an upper hole 111 and a lower hole 112 extending along a longitudinal axis thereof, a first shrinking portion 113 formed at one end portion thereof, and an inclined hole of the base 10. 102 has a second shrinkage portion 114 inserted into the one end portion and the opposite end portion thereof, and the sewing head portion 12 is fixed in the first shrinkage portion 113 and has two shaft holes, The first shaft hole 122 and the second shaft hole 123, and the round groove 121 formed in the front surface of the first and second shaft holes 122 and 123 are provided.

In addition, the front cam 13 is made into a shape that can be fitted to the sewing head portion 12, the gear chamber 132, and the protrusion shaft 133, protruding toward the sewing head portion 12, the turn It has a round groove 134 formed on the top of the gear chamber 132 to install the Jeonbuk, and the opening 131 formed in the upper end of the round groove 134 so that the sewing needle can pass, the arm body unit (1) The bottom end of the base 10 provided in the base 10 is connected to the bearing block 106 through the connecting rod 14 inside the body base 5.

Meanwhile, the power transmission unit 2 includes a central shaft 21 rotated by the drive belt 20 via a variable speed gear set 211 and a drive gear 212 mounted on the central shaft 21. A gear holder (23) fixed in the second chamber (105) to hold the drive gear (232), a gear belt (22) mounted to rotate around the drive gears (212, 232), and the drive gear (232); Universal joint 233, one end is connected to the gear shaft of the), the lower power transmission shaft 24 is formed with a spherical chuck 241 at the other end, while one end is connected to the opposite end of the universal joint 233, The reversible power transmission gear 25 is fixed to the inside of the sewing head 12 and rotated on the projection shaft 133 of the front cap 13 by the spherical chuck 241 of the lower power transmission shaft 24, Round groove 121 is installed on the reversible power transmission gear 25 to rotate the drive plate 26 The drive belt 251 is mounted on and, once that is selectively rotated in the forward and backward directions by the drive plate 26 is JEONBUK 27 is provided.

Here, the driving plate 26 is opposite to the gear 262 formed on one side so as to be connected to the reversible power transmission gear 25 via the driving belt 251 and to move the rotary book 27. It has a support 261 formed on the side, as the central shaft 21 is rotated through the gear belt 22 and the gear holder 23, the lower power transmission shaft 24 and the reversible power transmission gear 25 As the rotation driving force is transmitted to the driving plate 26, the driving plate 26 causes the rotary book 27 to rotate synchronously.

As shown in FIGS. 2 to 4, the reciprocating unit 3 has the transfer plate 135 in a straight line with the sewing needle 52 while the transfer plate 135 moves the arm body unit 1. The reciprocating unit 3 has a sheet 31 mounted to be moved in the bearing mounting hole 101 by the bearing 32 as shown in the figure so that the sewing operation can be performed smoothly. , A drive gear 33 mounted concentrically with the central shaft 21 on the sheet 31 for rotationally driving the drive gear 351 in the gear holder 35 through the gear belt 34, one end portion; Is connected to the drive gear 351 via the universal joint 352 and the other end is inserted through the upper hole 111 of the arm body 11 while being spherical chuck to drive the reversible power transmission gear 37. Upper power transmission shaft 36 is formed and (361) And a gearing 381 engaged by the transfer plate holder 38 in the round groove 134 while engaging with the reversible power transmission gear 37.

In addition, as shown in FIG. 2, the balancing unit 4 is coupled to the upper gear 41 via the bearing 48, and is aligned with the upper shaft 40 in alignment with the central shaft 21. , A lower shaft 47 coupled to the lower gear 43 via a bearing 46, a drive belt 42 mounted between the upper and lower gears 41 and 43, and the lower gear 43. Equipped with a camshaft 44 coupled to the counterweight 45 in addition to being mounted on the lower shaft 47 in the, when the arm body unit 1 is moved forward or rearward the counterweight 45 By being moved rearward or forward, the arm body unit 1 can be continuously maintained in an equilibrium state.

In addition, since the gear holders 35 and 23 in the first and second chambers 104 and 105 are mounted to be adjusted, respectively, the tension of the gear belts 22 and 34 can be adjusted without noise, respectively. Since the spherical chucks 241 and 361 of the power transmission shafts 24 and 36 are supported by crossbars in the holes on the gear shafts of the reversible power transmission gears 25 and 37, the power transmission shafts 24 and 36 move in either direction. When it is rotated, the reversible power transmission gears 25 and 37 are rotated accordingly, and the stress concentrated in the inclined hole 102 and the central shaft 21 by the arrangement of the connecting rods 14 is somewhat reduced. In the sewing process, the external pressure applied to the sewing head 12 and the front cap 13 is partially transmitted to the upper gear 41 through the connecting rod 14, which is the freezing rod 14. One end is connected to the bottom end of the base 10 and French other while the leading end is inserted through the curved groove 51 formed on the unit base 5, since it is combined with the bearing block 106 of the upper gear (41).

Claims (4)

Arm body unit (1), power transmission unit (2), reciprocating unit (3), and balancing unit (4) to control the position of the work support arm while controlling the movement of the rotary book (27) and the transfer plate (135). In the power transmission and balancing device of the sewing machine equipped with), the arm body unit (1) is a base 10 pivotally coupled to the sewing machine body base (5), and the arm body (11) to the base (10) It is equipped with a sewing head portion 12 connected by a medium, a front cap 13 attached to the sewing head portion 12, and the bearing sheet 31 and the pivot coupling on the sewing machine body base 5 via a bearing. A bearing mounting hole 10 is formed in one end of the base 10, and an inclined hole 102 is formed in the tip of the base 10 opposite to the one end, and the inclined hole 102 and the bearing are formed. The first and second chambers 104 and 105 are partitioned between the mounting holes 101, and the arm body 11 An upper hole 111 and a lower hole 112 are formed along the longitudinal axis; The power transmission unit 2 includes a central shaft 21 inserted into the bearing sheet 31 through a hole, a drive gear 212 and a drive gear 232 mounted on the central shaft 21. A gear holder 23 fixed to be adjusted in the second chamber 105 to support it, a gear belt 22 mounted so as to be rotationally driven over the drive gears 212 and 213, and one end of the universal joint 233 In addition to being connected to the drive gear 232 through the lower end is inserted through the lower hole 112, the lower power transmission shaft 24 having a spherical chuck 241, coupled to the spherical chuck 241. A reversible power transmission gear 25 and a gear drive belt 251 coupled with the reversible power transmission gear 25 to rotate the rotary book 27 through the drive plate 26; A drive in which the reciprocating unit 4 is mounted concentrically with the central shaft 21 on the sheet 31 for rotationally driving the drive gear 351 in the gear holder 35 via the gear belt 34. In order to drive the reversible power transmission gear 37 while the gear 33 and one end portion are connected to the drive gear 351 via the universal joint 352, the other end portion is inserted through the upper hole 111. The upper power transmission shaft 36 having a spherical chuck 361, the gearing 381 engaged with the reversible power transmission gear 37, and the needle hole formed on the transfer plate 135 are continuously connected to the sewing needle 52. A transfer plate holder 38 disposed around the gear ring 381 to support the transfer plate 135 to be aligned in a straight line; The balancing unit 4 is a drive mounted between the upper shaft 40 coupled with the upper gear 41, the lower shaft 47 coupled with the lower gear 43, and the upper and lower gears 41 and 43. Equipped with a gear belt 42 and a cam shaft 44 mounted on the lower shaft 47 and coupled with the counterweight 45, the arm body unit when the arm body 11 is moved in one direction Power transmission and balancing device of the sewing machine to move the counterweight (45) in the opposite direction (1). The upper shaft (40) according to claim 1, wherein the inclined hole (102) formed on the base (10) of the arm body unit (1) is connected to the upper shaft (40) via a connecting rod (14) for supporting the arm body unit (10). Power transmission and balancing device of the sewing machine, characterized in that it has a bottom end connected to the bearing block 106 on the top. According to claim 1, The sewing head 12 is provided with a round groove 121 formed to support the drive belt 251, the transfer plate 135 can be slid to the upper end of the front cam (13) Power transmission and balancing device, characterized in that the opening 131 is formed so that. The sewing machine according to claim 1, wherein the reversible power transmission gears (25, 37) are provided with crossbars so as to engage with the first spherical chuck (241) or the second spherical chuck (361) on the hollow gear shaft, respectively. Power train and balancing device.