CN210975116U - Hand wheel mechanism for sewing machine - Google Patents

Abstract

The utility model provides a hand wheel mechanism for sewing machine, which relates to the technical field of sewing machine parts, comprising a hand wheel, wherein the side wall of the hand wheel is provided with a hand wheel anti-rotation device, the hand wheel anti-rotation device comprises an outer cover body, an inner wheel body and a positioning device, the outer cover body and the hand wheel are arranged in parallel at intervals, the outer cover body comprises a left side plate, a right side plate, a bottom plate and a U-shaped top plate, the bottoms of the left side plate and the right side plate are respectively and vertically arranged at the two ends of the bottom plate, the U-shaped top plate is arranged between the tops of the left side plate and the right side plate, the inner wheel body is arranged between the left side plate and the right side plate, the positioning device is arranged in a U-shaped opening of the U-shaped top plate, the inner wheel body comprises a first wheel body, a second wheel, and first wheel body and second wheel body all fix the setting in the pivot, and the one end of pivot is rotated and is set up on the inner wall of left side board. The utility model has the advantages of can prevent to skid when the hand wheel rotates, and can prevent that the hand wheel from being bumped by the mistake and leading to rotating.

Description

Hand wheel mechanism for sewing machine

Technical Field

The utility model relates to a sewing machine spare part technical field, concretely relates to a hand wheel mechanism for sewing machine.

Background

The hand wheel of the sewing machine is usually arranged at the tail end of the upper shaft, the shell of the sewing machine is exposed, and the hand wheel is rotated manually to drive the upper shaft to rotate so as to adjust the height of the needle and perform manual sewing. The hand wheel exposes convenient operation outside the casing, but at work intermittence, is touched by the staff mistake of walking in operator or the workshop easily, drives the needle motion, forms unnecessary seam mark or damages the needle, even causes the injury to the personnel. And the outer circular wall of the hand wheel is generally made of smooth metal materials, so that the hand wheel is easy to slip during rotation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a have and to prevent to skid when the hand wheel rotates, and can prevent that the hand wheel from being bumped by the mistake and leading to the pivoted hand wheel mechanism that is used for sewing machine.

In order to solve the technical problem, the utility model provides a hand wheel mechanism for sewing machine, which comprises a hand wheel, a hand wheel anti-rotation device is arranged on the side wall of the hand wheel, the hand wheel anti-rotation device comprises an outer cover body, an inner wheel body and a positioning device, the outer cover body and the hand wheel are arranged in parallel at intervals, the outer cover body comprises a left side plate, a right side plate, a bottom plate and a U-shaped top plate, the bottoms of the left side plate and the right side plate are respectively and vertically arranged at the two ends of the bottom plate, the U-shaped top plate is arranged between the tops of the left side plate and the right side plate, an inner wheel body is arranged between the left side plate and the right side plate, the positioning device is arranged in a U-shaped opening of the U-shaped top plate, the inner wheel body comprises a first wheel body, a second wheel body and a rotating shaft, the first wheel body and the second wheel body are arranged in parallel between the left side plate and the right side, the other end of the rotating shaft sequentially penetrates through the first wheel body, the second wheel body and the right side plate to the hand wheel, the first wheel body, the second wheel body, the rotating shaft and the hand wheel are arranged on the same axis, a plurality of first clamping grooves and a plurality of second clamping grooves are further formed in the outer circular walls of the first wheel body and the second wheel body respectively, the positioning device comprises an intermediate beam, the intermediate beam is perpendicularly arranged on the U-shaped bottom surface of the U-shaped top plate, a first guide groove and a second guide groove are formed in two side walls of the intermediate beam respectively, a first sliding groove and a second sliding groove are formed in the inner wall of an opening at two ends of the U-shaped top plate respectively, an opening of the first guide groove is opposite to an opening of the first sliding groove, an opening of the second guide groove is opposite to an opening of the second sliding groove, and positioning blocks are further movably arranged between the first guide groove and the first sliding groove and between the second guide groove and the second.

Preferably, the positioning block comprises a hollow rectangular block, the hollow rectangular block is positioned between the middle beam and two ends of a U-shaped opening of the U-shaped top plate, an adjusting outer screw rod, a pressure plate, a compression spring and a clamping block are sequentially arranged in the hollow rectangular block from top to bottom, the adjusting outer screw rod penetrates through the top surface of the hollow rectangular block, one end of the adjusting outer screw rod is positioned outside the hollow rectangular block, the other end of the adjusting outer screw rod is positioned inside the hollow rectangular block, the pressure plate is fixedly arranged at the other end of the adjusting outer screw rod, the bottom surface of the rectangular block is in an open shape, the clamping block movably penetrates through the bottom surface of the hollow rectangular block, one end of the compression spring is fixedly connected with one end of the clamping block, the other end of the compression spring is rotatably connected with the pressure plate, the other end of the clamping block is positioned outside the bottom surface of the hollow rectangular block, still be provided with first slider and second slider on the both sides wall of cavity rectangle piece respectively, the cavity rectangle piece slides respectively through first slider and second slider and sets up between first spout and first guide way, between second guide way and the second spout, through the rotation regulation outer screw rod, it is adjustable to the compression spring packing force through the pressure disk, be favorable to making the card that the other end of fixture block can be better go into in first draw-in groove and the second draw-in groove, thereby play the effect of preventing changeing to the adversary's wheel.

Preferably, still be provided with locking device on the intermediate beam, locking device includes the base, the base passes through fixing bolt and sets up on the top surface of intermediate beam, still be provided with first gag lever post and second gag lever post on the both sides wall of base respectively, first gag lever post and second gag lever post are L shape rod structures, the L shape opening of first gag lever post and second gag lever post all faces the intermediate beam, and the one end of first gag lever post and the one end of second gag lever post are fixed respectively and are set up on the both sides wall of base, the other end of first gag lever post and the other end of second gag lever post are located respectively between first spout and the first guide way, between second guide way and the second spout, and the other end of first gag lever post and the other end of second gag lever post all contact with the hollow rectangular block, through fixing the base on the intermediate beam, first gag lever post and second gag lever post can block the hollow rectangular block, prevent that the hollow rectangular block from sliding.

Preferably, the hand wheel comprises a hand wheel body, the hand wheel body is fixedly arranged at the other end of the rotating shaft, the hand wheel body and the right side plate are arranged in parallel at intervals, the hand wheel body is of a circular structure, the outer circular wall of the hand wheel body is fixedly sleeved with an anti-skidding circular ring, the width of the anti-skidding circular ring is smaller than that of the hand wheel body, the hand wheel body is also provided with a plurality of first anti-skidding holes, a plurality of second anti-skidding holes and a plurality of anti-skidding protrusions, the first anti-skidding holes and the second anti-skidding holes are through holes, the first anti-skidding holes, the second anti-skidding holes and the anti-skidding protrusions are all distributed at equal intervals along the circumferential direction of the outer circle of the hand wheel body, the distance from the first anti-slip hole to the circle center of the hand wheel body is greater than the distance from the second anti-slip hole to the circle center of the hand wheel body, the first anti-slip hole and the anti-slip bulge are arranged in a staggered and spaced mode, and the first anti-slip hole, the second anti-slip hole and the anti-slip bulge are beneficial to playing an anti-slip role when the hand wheel body is rotated; first non-slip hole and second non-slip hole are the through-hole can be convenient for different users manually to grip the hand wheel body and all can play anti-skidding effect when rotating.

Preferably, the shape and the size of the first clamping groove and the second clamping groove are the same, the shape and the size of the other end of the clamping block are matched with the shape and the size of the first clamping groove, and the position of the other end of the clamping block corresponds to the position of the first clamping groove and the position of the second clamping groove respectively, so that the other end of the clamping block can be clamped into the first clamping groove and the second clamping groove, and the anti-rotation effect is achieved on the hand wheel.

Preferably, the first clamping grooves and the second clamping grooves are arranged on the outer circular walls of the first wheel body and the second wheel body in a staggered mode, so that the other ends of the clamping blocks can be clamped into the first clamping grooves and the second clamping grooves, and the anti-rotation effect is achieved on the hand wheels.

Preferably, the anti-slip protrusions are of a hemispherical structure and made of rubber materials, so that the anti-slip effect is achieved when the hand wheel body is rotated.

The utility model has the advantages that:

(1) the first anti-slip hole, the second anti-slip hole and the anti-slip bulge are beneficial to playing an anti-slip role when the hand wheel body is rotated; the first anti-slip hole and the second anti-slip hole are through holes, so that different users can conveniently hold the hand wheel body manually to rotate, and an anti-slip effect can be achieved;

(2) the positioning blocks arranged on the two sides of the middle beam are clamped into the first clamping groove and the second clamping groove through the other ends of the clamping blocks, so that the hand wheel is prevented from rotating.

Drawings

The accompanying drawings are included to provide a preferred understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a hand wheel mechanism for a sewing machine according to the present invention;

fig. 2 is a schematic view of a hand wheel structure of a hand wheel mechanism for a sewing machine according to the present invention;

FIG. 3 is a schematic view of a rotating shaft of a hand wheel mechanism for a sewing machine according to the present invention;

fig. 4 is a schematic view of the position of the middle beam of the hand wheel mechanism for the sewing machine of the present invention;

fig. 5 is a schematic view of a positioning block structure of a hand wheel mechanism for a sewing machine according to the present invention;

fig. 6 is a schematic structural view of a locking device of a hand wheel mechanism for a sewing machine according to the present invention;

the reference signs are: 1. a hand wheel; 11. a hand wheel body; 12. an anti-slip ring; 13. a first anti-slip hole; 14. a second anti-slip aperture; 15. anti-skid projections; 2. a hand wheel rotation prevention device; 3. an outer cover body; 31. a left side plate; 32. a right side plate; 33. a base plate; 34. a U-shaped top plate; 341. a first chute; 342. a second chute; 4. an inner wheel body; 41. a first wheel body; 411. a first card slot; 42. a second wheel body; 421. a second card slot; 43. a rotating shaft; 5. a positioning device; 51. a center sill; 511. a first guide groove; 512. a second guide groove; 6. positioning blocks; 61. a hollow rectangular block; 62. adjusting the outer screw rod; 63. a platen; 64. a compression spring; 65. a clamping block; 66. a first slider; 67. a second slider; 7. a locking device; 71. a base; 711. fixing the bolt; 72. a first limit rod; 73. a second limiting rod.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-6, a hand wheel mechanism for a sewing machine according to the present embodiment includes a hand wheel 1, a hand wheel rotation preventing device 2 is disposed on a side wall of the hand wheel 1, the hand wheel rotation preventing device 2 includes an outer cover body 3, an inner wheel body 4 and a positioning device 5, the outer cover body 3 and the hand wheel 1 are spaced and arranged in parallel, the outer cover body 3 includes a left side plate 31, a right side plate 32, a bottom plate 33 and a U-shaped top plate 34, bottoms of the left side plate 31 and the right side plate 32 are respectively vertically disposed at two ends of the bottom plate 33, the U-shaped top plate 34 is disposed between tops of the left side plate 31 and the right side plate 32, the inner wheel body 4 is disposed between the left side plate 31 and the right side plate 32, the positioning device 5 is disposed in a U-shaped opening of the U-shaped top plate 34, the inner wheel body 4 includes a first wheel body 41, a second wheel body 42 and a rotating shaft 43, the first wheel body 41 and the second wheel body 42 are disposed in parallel between the left side plate 31 and, one end of the rotating shaft 43 is rotatably disposed on the inner wall of the left side plate 31, the other end of the rotating shaft 43 sequentially passes through the first wheel body 41, the second wheel body 42 and the right side plate 32 to the hand wheel 1, and the first wheel body 41, the second wheel body 42, the rotating shaft 43 and the hand wheel 1 are on the same axial line, the outer circumferential walls of the first wheel body 41 and the second wheel body 42 are further respectively provided with a plurality of first slots 411 and a plurality of second slots 421, the positioning device 5 comprises a middle beam 51, the middle beam 51 is vertically disposed on the U-shaped bottom surface of the U-shaped top plate 34, two side walls of the middle beam 51 are respectively provided with a first guiding groove 511 and a second guiding groove 512, the inner walls of the openings at the two ends of the U-shaped top plate 34 are respectively provided with a first sliding groove 341 and a second sliding groove 342, the opening of the first guiding groove 511 is opposite to the opening of the first sliding groove 341, the opening of the second guiding groove 512 is opposite to, positioning blocks 6 are movably arranged between the first guide groove 511 and the first sliding groove 341 and between the second guide groove 512 and the second sliding groove 342.

The positioning block 6 comprises a hollow rectangular block 61, the hollow rectangular block 61 is located between two ends of a U-shaped opening of a central beam 51 and a U-shaped top plate 34, an adjusting outer screw 62, a pressure plate 63, a compression spring 64 and a fixture block 65 are sequentially arranged from top to bottom in the hollow rectangular block 61, the adjusting outer screw 62 passes through the top surface of the hollow rectangular block 61, one end of the adjusting outer screw 62 is located outside the hollow rectangular block 61, the other end of the adjusting outer screw 62 is located inside the hollow rectangular block 61, the pressure plate 63 is fixedly arranged at the other end of the adjusting outer screw 62, the bottom surface of the rectangular block 61 is open, the fixture block 65 movably passes through the bottom surface of the hollow rectangular block 61, one end of the compression spring 64 is fixedly connected with one end of a fixture block 65, the other end of the compression spring 64 is rotationally connected with the pressure plate 63, the other end of the fixture block 65 is located outside the bottom surface of the hollow rectangular block 61, the fixture block 65, the other end of the fixture block 65 is respectively corresponding to the positions of a first fixture groove 411 and a second fixture groove 421, two side walls of the first fixture groove 411 and a second fixture groove 411, two side walls of a first fixture groove 411 and a second fixture groove 421, two side wall 61, a second fixture groove 71 are respectively provided with a first anti-skid-slip-proof block 71, a first anti-proof block 71, a second anti-slip-proof block 71 is respectively, a first anti-wheel 13, a second anti-slip-wheel 13, a first anti-slip-stop-wheel 13-stop-slip-stop-bar 71 is arranged on a first hand wheel 13-stop-wheel 13, a first hand-wheel 7-wheel 13-wheel 7-hand.

The utility model discloses a theory of operation is: the left side plate 3 or the bottom plate 33 is fixed on a sewing machine, when the hand wheel body 11 rotates, the first wheel body 41 and the second wheel body 42 are driven to rotate simultaneously through the rotating shaft 43, when the anti-rotation setting of the hand wheel body 11 is not needed, the outer screw 62 can be adjusted through rotation, the outer screw 62 can be adjusted to be screwed out of the hollow rectangular block 61, the outer screw 62 can be adjusted to drive the fixture block 65 to move in the opposite directions of the first wheel body 41 and the second wheel body 42 through the compression spring 64, namely, the other end of the fixture block 65 is located outside the first fixture groove 411 and the second fixture groove 421, and further, when the hand wheel body 11 rotates, the fixture block 65 cannot be in contact with the first wheel body 41 and the second wheel body 42; when the anti-rotation setting of the hand wheel body 11 is needed, the outer screw rod 62 can be adjusted through rotation, the outer screw rod 62 can be adjusted through driving the fixture block 65 to move towards the directions of the first wheel body 41 and the second wheel body 42 through the compression spring 64, and the other end of the fixture block 65 is in contact with the outer walls of the first wheel body 41 and the second wheel body 42, so that when the hand wheel body 11 rotates, the fixture block 65 corresponds to the positions of the first clamping groove 411 and the second clamping groove 421, the fixture block 65 can be clamped into the first clamping groove 411 and the second clamping groove 421 under the action of the compression spring 64, and the effect of preventing the hand wheel body 11 from being mistakenly touched and rotated can be achieved; the first anti-slip holes 13, the second anti-slip holes 14 and the anti-slip bumps 15 are beneficial to playing an anti-slip role when the hand wheel body 11 is rotated; the first anti-slip hole 13 and the second anti-slip hole 14 are through holes, so that different users can conveniently grip the hand wheel body 11 manually and can achieve an anti-slip effect when rotating; the first engaging grooves 411 and the second engaging grooves 421 are alternately disposed on the outer circumferential walls of the first wheel body 41 and the second wheel body 42, so that the other ends of the engaging blocks 65 are alternately engaged with the first engaging grooves 411 and the second engaging grooves 421 on the first wheel body 41 and the second wheel body 42, and when the engaging blocks 65 in the first engaging grooves 411 or the second engaging grooves 421 fail to rotate the hand wheel body 11, the engaging blocks 65 can be engaged with the second engaging grooves 421 or the first engaging grooves 411.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A hand wheel mechanism for a sewing machine, characterized in that: the anti-rotation device comprises a hand wheel (1), a hand wheel anti-rotation device (2) is arranged on the side wall of the hand wheel (1), the hand wheel anti-rotation device (2) comprises an outer cover body (3), an inner wheel body (4) and a positioning device (5), the outer cover body (3) and the hand wheel (1) are arranged in parallel at intervals, the outer cover body (3) comprises a left side plate (31), a right side plate (32), a bottom plate (33) and a U-shaped top plate (34), the bottoms of the left side plate (31) and the right side plate (32) are respectively and vertically arranged at two ends of the bottom plate (33), the U-shaped top plate (34) is arranged between the tops of the left side plate (31) and the right side plate (32), the inner wheel body (4) is arranged between the left side plate (31) and the right side plate (32), the positioning device (5) is arranged in a U-shaped opening of the U-shaped top plate (34), the inner wheel body (4) comprises a first wheel body (41), a second wheel body (42) and a rotating shaft (43), the first wheel body A first wheel body (41) and a second wheel body (42) are fixedly arranged on a rotating shaft (43), one end of the rotating shaft (43) is rotatably arranged on the inner wall of a left side plate (31), the other end of the rotating shaft (43) sequentially penetrates through the first wheel body (41), the second wheel body (42) and a right side plate (32) to the hand wheel (1), the first wheel body (41), the second wheel body (42), the rotating shaft (43) and the hand wheel (1) are arranged on the same axial line, a plurality of first clamping grooves (411) and a plurality of second clamping grooves (421) are respectively arranged on the outer circular walls of the first wheel body (41) and the second wheel body (42), a positioning device (5) comprises an intermediate beam (51), the intermediate beam (51) is vertically arranged on the U-shaped bottom surface of a U-shaped top plate (34), and a first guide groove (511) and a second guide groove (512) are respectively arranged on two side walls of the intermediate beam (51), a first sliding groove (341) and a second sliding groove (342) are respectively arranged on the inner wall of the opening at the two ends of the U-shaped top plate (34), the opening of the first guide groove (511) is opposite to the opening of the first sliding groove (341), the opening of the second guide groove (512) is opposite to the opening of the second sliding groove (342), and positioning blocks (6) are respectively and movably arranged between the first guide groove (511) and the first sliding groove (341) and between the second guide groove (512) and the second sliding groove (342).

2. A hand wheel mechanism for a sewing machine as claimed in claim 1, wherein: the positioning block (6) comprises a hollow rectangular block (61), the hollow rectangular block (61) is positioned between the middle beam (51) and two ends of a U-shaped opening of the U-shaped top plate (34), an adjusting outer screw rod (62), a pressure plate (63), a compression spring (64) and a clamping block (65) are sequentially arranged in the hollow rectangular block (61) from top to bottom, the adjusting outer screw rod (62) penetrates through the top surface of the hollow rectangular block (61), one end of the adjusting outer screw rod (62) is positioned outside the hollow rectangular block (61), the other end of the adjusting outer screw rod (62) is positioned inside the hollow rectangular block (61), the pressure plate (63) is fixedly arranged at the other end of the adjusting outer screw rod (62), the bottom surface of the rectangular block (61) is open, the clamping block (65) movably penetrates through the bottom surface of the hollow rectangular block (61), and one end of the compression spring (64) is fixedly connected with one end of the clamping block (65), the other end of the compression spring (64) is rotatably connected with the pressure plate (63), the other end of the fixture block (65) is located outside the bottom surface of the hollow rectangular block (61), the other end of the fixture block (65) is located corresponding to the positions of the first clamping groove (411) and the second clamping groove (421), a first sliding block (66) and a second sliding block (67) are further arranged on two side walls of the hollow rectangular block (61) respectively, and the hollow rectangular block (61) is arranged between the first sliding groove (341) and the first guide groove (511) and between the second guide groove (512) and the second sliding groove (342) through the first sliding block (66) and the second sliding block (67) in a sliding mode respectively.

3. The hand wheel mechanism for the sewing machine as claimed in claim 2, wherein the intermediate beam (51) is further provided with a locking device (7), the locking device (7) comprises a base (71), the base (71) is arranged on the top surface of the intermediate beam (51) through a fixing bolt (711), two side walls of the base (71) are further respectively provided with a first limiting rod (72) and a second limiting rod (73), the first limiting rod (72) and the second limiting rod (73) are both L-shaped rod structures, L-shaped openings of the first limiting rod (72) and the second limiting rod (73) face the intermediate beam (51), one end of the first limiting rod (72) and one end of the second limiting rod (73) are respectively and fixedly arranged on the base (71), the other end of the first limiting rod (72) and the other end of the second limiting rod (73) are respectively located between the first sliding groove (511) and the first guide groove (511), the other end of the second guide groove (512) and the second guide groove (73), and the other end of the first limiting rod (342) and the second limiting rod (73) are respectively in contact with the hollow sliding groove (61).

4. A hand wheel mechanism for a sewing machine as claimed in claim 1, wherein: the hand wheel (1) comprises a hand wheel body (11), the hand wheel body (11) is fixedly arranged at the other end of the rotating shaft (43), the hand wheel body (11) and the right side plate (32) are arranged in parallel at intervals, the hand wheel body (11) is of a circular structure, an anti-skidding circular ring (12) is fixedly sleeved on the outer circular wall of the hand wheel body (11), the width of the anti-skidding circular ring (12) is smaller than that of the hand wheel body (11), a plurality of first anti-skidding holes (13), a plurality of second anti-skidding holes (14) and a plurality of anti-skidding protrusions (15) are further arranged on the hand wheel body (11), the first anti-skidding holes (13) and the second anti-skidding holes (14) are through holes, the first anti-skidding holes (13), the second anti-skidding holes (14) and the anti-skidding protrusions (15) are all distributed equidistantly along the outer circular direction of the hand wheel body (11), and the distance from the first anti-skidding holes (13) to the circle center of the hand wheel body (11) is greater than the distance from the second anti-skidding holes (, the first anti-skid holes (13) and the anti-skid projections (15) are arranged at intervals in a staggered mode.

5. A hand wheel mechanism for a sewing machine as claimed in claim 2, wherein: the shape and size of the first clamping groove (411) and the second clamping groove (421) are the same, and the shape and size of the other end of the clamping block (65) are matched with those of the first clamping groove (411).

6. A hand wheel mechanism for a sewing machine as claimed in claim 1, wherein: the first clamping grooves (411) and the second clamping grooves (421) are arranged on the outer circular walls of the first wheel body (41) and the second wheel body (42) in a staggered mode.

7. A hand wheel mechanism for a sewing machine according to claim 4, wherein: the anti-skid protrusions (15) are of a hemispherical structure, and the anti-skid protrusions (15) are made of rubber materials.

Images