Cloth pressing and positioning device of sewing machine

Abstract

A cloth pressing and positioning device of a sewing machine comprises a workbench, a supporting column and a sewing machine body. A first sliding groove is formed in the rear side of the supporting column, and a first electric telescopic rod and a lifting block are installed in the first sliding groove. A lifting rod is fixed to the rear end of the lifting block. Two first through grooves are formed in the lifting rod. A second sliding groove is formed in the groove wall of the top end of the first through groove. And a first sliding block and a spring are arranged in the first through groove. A screw is fixed to the top end of the first sliding block. The screw rod is sleeved with an abutting nut. A shaft rod is rotationally connected to the first sliding block. A compression roller and a driven wheel are respectively fixed at the front and rear ends of the shaft rod. Vertical rods are fixed to the top ends of the lifting rods. And a second through groove is formed in the vertical rod. And a second electric telescopic rod and a second sliding block are mounted in the second through groove. And a motor and a driving wheel are mounted on the second sliding block. The spacing distance between the two pressing rollers can be adjusted according to the size of the cloth, the cloth pressing device can also be suitable for small-size cloth, and therefore the use range of the cloth pressing device is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely is a sewing machine cloth pressing positioning device. BACKGROUND

[0002] The applicant previously applied and was granted a utility model patent with the authorized announcement number CN218910740U, a cloth pressing positioning device for sewing machine, which comprises a workbench and a sewing machine body, a support column is fixed to the rear side of the workbench, a first sliding groove is formed in the front side of the support column, a first cavity is formed in the inside of the support column, a sliding hole is communicated between the first cavity and the first sliding groove, a lifting rod and a driving structure for driving the lifting rod to move up and down are arranged in the first cavity, the bottom end of the lifting rod is connected with the driving structure, the top end of the lifting rod penetrates into the first sliding groove through the sliding hole and is fixed with a first sliding block sliding along the first sliding groove, the front end of the first sliding block penetrates out of the first sliding groove and is fixed with a horizontally arranged support, and the front side of the support is rotatably connected with a pressing roller through bearings at both ends.

[0003] However, the applicant found in the actual use process that the interval distance between the two pressing rollers in the application cannot be adjusted, so that some small-sized cloth cannot be applied to the utility model.

[0004] Therefore, the utility model provides a technical scheme to solve the problem that the interval distance between the two pressing rollers cannot be adjusted and the application range is small. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a sewing machine cloth pressing positioning device, which can freely adjust the interval distance between the two pressing rollers according to the size of the cloth, thereby improving the use range.

[0006] The utility model provides a sewing machine press cloth positioning device, including the workbench and the sewing machine body, the rear side of workbench is fixed with the support column, the top of support column's front side is fixed with the sewing machine body and is located the just above workbench, the rear side of support column is equipped with the first sliding groove that extends vertically up and down, the first sliding groove's groove bottom wall is installed with first electric telescopic link, the piston rod of first electric telescopic link extends vertically upwards and is fixed with the lifting piece that slides along the groove wall of first sliding groove, the rear end of lifting piece passes out first sliding groove and is fixed with the lifting lever that extends laterally, the lifting lever is equipped with two first through groove that sets up symmetrically left and right, first through groove penetrates lifting lever front and back and extends laterally, the top end groove wall of first through groove is equipped with the second sliding groove, the second sliding groove leads to the top of lifting lever and is identical with the extension direction of first through groove, the first sliding block is slidably connected in the first through groove, the top of first sliding block is fixed with the screw rod that slides along the second sliding groove, the top of screw rod passes out the second sliding groove, and its outside is connected with the abutting nut of abutting in the top of lifting lever in the threaded connection mode, the spring is fixedly connected between first sliding block and the groove wall of first through groove, the shaft rod is rotatably connected on the first sliding block and penetrates the first sliding block front and back, the front end of shaft rod is fixed with the compression roller that is arranged concentrically and coaxially, the rear end of shaft rod is fixed with the driven wheel, the top middle position of lifting lever is fixed with the vertical rod, the vertical rod is equipped with the second through groove, the second through groove penetrates the vertical rod front and back and extends vertically up and down, the second through groove's groove bottom wall is installed with second electric telescopic link, the piston rod of second electric telescopic link extends vertically upwards and is fixed with the second sliding block that slides along the groove wall of second through groove, the front end of second sliding block is installed with motor, the output shaft of motor extends horizontally rearward and penetrates the second sliding block and is fixed with the driving wheel, the driving wheel and two driven wheels are drivenly connected through the belt.

[0007] By adopting the above technical scheme, the sewing material is placed on the workbench, if the size of the cloth is less than the interval distance between the two compression rollers, first, the interval distance between the two compression rollers is adjusted according to the size of the cloth. Then, the piston rod of the first electric telescopic rod drives the lifting block to move downward along the first sliding groove. The lifting block drives the lifting lever to descend. The lifting lever drives the first sliding block to move downward, and the first sliding block drives the shaft rod to move downward. The shaft rod drives the compression roller to move downward. The compression roller compresses the two ends of the sewing material. After sewing is completed, the motor is started, the motor drives the driving wheel to rotate, the driving wheel drives the two driven wheels to rotate synchronously through the belt. The driven wheel drives the shaft rod fixedly connected thereto to rotate. The shaft rod drives the compression roller fixedly connected thereto to rotate, so that the two compression rollers rotate synchronously. The compression rollers in rotation send the processed sewing material out and into the sewing material that needs to be processed. Avoiding the accumulation of sewing material on the workbench.

[0008] The adjusting process of the interval distance between the two compression rollers is as follows: when it is needed to reduce the interval distance between the two compression rollers, the two pressing nuts are loosened first. Then the piston rod of the second electric telescopic rod is elongated to drive the second sliding block to move upwards along the second sliding groove. The second sliding block drives the motor and the driving wheel to move upwards. Since the driven wheels are connected to the first sliding blocks through shafts, the screw rods on the first sliding blocks can only move left and right along the second sliding groove, and thus the first sliding blocks can only slide left and right along the first sliding groove. Therefore, after the driving wheel moves upwards, the two driven wheels can be driven to move towards each other through the belt, the two shafts are driven to move towards each other, the two first sliding blocks are driven to move towards each other, and the two compression rollers are driven to move towards each other. Meanwhile, when the first sliding blocks move, the springs are pressed to generate a rebound force. After the two compression rollers are moved to the position, the pressing nuts are tightened again.

[0009] Similarly, when it is needed to restore the interval distance between the two compression rollers, the two pressing nuts are loosened first. Then the piston rod of the second electric telescopic rod is retracted to drive the second sliding block to move downwards along the second sliding groove. Under the action of the rebound force of the spring, the two first sliding blocks move reversely, thereby driving the two driven wheels to move reversely, and the belt is always tensioned between the driving wheel and the two driven wheels. Meanwhile, the two compression rollers are also driven to move reversely. After the two compression rollers are moved to the position, the pressing nuts are tightened again.

[0010] The utility model discloses can adjust the interval distance between two compression rollers according to the size of cloth, and small size cloth can also be applicable to the utility model, thereby improving the use range of the utility model.

[0011] Further settings of the utility model are as follows: first strip-shaped limiting grooves extending longitudinally upwards and downwards are arranged on the left and right groove walls of the first sliding groove, and first limiting blocks for being inserted into the first strip-shaped limiting grooves and sliding upwards and downwards along the first strip-shaped limiting grooves are fixed on the outer side walls of the lifting blocks.

[0012] By adopting the above technical scheme, when the lifting blocks move upwards and downwards along the first sliding groove, the first limiting blocks are driven to slide upwards and downwards along the first strip-shaped limiting grooves. The stability of the lifting blocks when sliding upwards and downwards is improved.

[0013] Further settings of the utility model are as follows: second strip-shaped limiting grooves extending longitudinally upwards and downwards are arranged on the left and right groove walls of the second sliding groove, and second limiting blocks for being inserted into the second strip-shaped limiting grooves and sliding upwards and downwards along the second strip-shaped limiting grooves are fixed on the outer side walls of the second sliding blocks.

[0014] By adopting the above technical scheme, when the second sliding blocks slide upwards and downwards along the second sliding groove, the second limiting blocks are driven to slide upwards and downwards along the second strip-shaped limiting grooves. The stability of the second sliding blocks when sliding upwards and downwards is improved.

[0015] The utility model discloses further provide: the upper and lower both sides outer lateral wall of first slider all are equipped with a plurality of installation groove, the installation groove is installed with universal ball, the one end of universal ball is passed and is connected with the groove wall rolling of first through -slot.

[0016] Through adopting above technical scheme, the setting of universal ball improves the smoothness of first slider when sliding.

[0017] The utility model discloses further provide: the left and right sides groove wall between first through -slot is fixedly connected with the guide rod of the dislocation of axle rod, first slider sliding is set up in the outside of guide rod, spring is set up in the outside of guide rod.

[0018] Through adopting above technical scheme, first slider is along guide rod and slides in first through -slot, and the setting of guide rod can prevent first slider from falling out of first through -slot, and improves the stability of first slider when sliding.

[0019] The utility model discloses further provide: the front and rear both ends groove mouth of first through -slot all are fixed with the organ -type dustproof folding cloth for covering first through -slot.

[0020] Through adopting above technical scheme, prevent the impurity such as cotton flock and enter first through -slot, cause the sliding of first slider to be influenced.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] A sewing machine cloth pressing positioning device, the utility model discloses can adjust the interval distance between two compression rollers according to the size of cloth, small size cloth can also be applicable to the utility model, thereby improving the use range of the utility model. ACCURACY OF DRAWINGS

[0023] Fig. 1 It is the structural schematic diagram of a sewing machine cloth pressing positioning device of the utility model;

[0024] Fig. 2 It is the sectional view of the side direction of the support column, first electric telescopic link, lifting block, lifting rod, second electric telescopic link, second sliding block, motor and driving wheel of a sewing machine cloth pressing positioning device of the utility model;

[0025] Fig. 3 It is the partial sectional view of the front direction of the lifting rod, guide rod, first sliding block, spring, screw rod and abutting nut of a sewing machine cloth pressing positioning device of the utility model.

[0026] The drawing mark: 1, workbench;2, sewing machine body;3, support column;4, first sliding groove;5, first electric telescopic rod;6, lifting block;7, lifting rod;8, first through groove;9, second sliding groove;10, first sliding block;11, screw;12, abutting nut;13, spring;14, shaft;15, compression roller;16, driven wheel;17, vertical rod;18, second through groove;19, second electric telescopic rod;20, second sliding block;21, motor;22, driving wheel;23, guide rod;24, organ type dustproof folding cloth. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] A sewing machine cloth pressing positioning device, as shown in Figs. 1-3 The rear side of the workbench 1 is fixed with a support column 3. The sewing machine body 2 is fixed to the top front side of the support column 3 and is located directly above the workbench 1.

[0029] The rear side of the support column 3 is provided with a first sliding groove 4 extending longitudinally upward and downward. The first electric telescopic rod 5 is installed on the groove bottom wall of the first sliding groove 4. The piston rod of the first electric telescopic rod 5 extends vertically upward and is fixed with a lifting block 6 sliding upward and downward along the groove wall of the first sliding groove 4. The rear end of the lifting block 6 penetrates out of the first sliding groove 4 and is fixed with a lifting rod 7 extending laterally left and right.

[0030] Two first through grooves 8 symmetrically arranged left and right are formed in the lifting rod 7. The first through grooves 8 transversely penetrate the lifting rod 7 front and back, and extend laterally left and right. The second sliding groove 9 is formed in the top end groove wall of the first through groove 8. The second sliding groove 9 leads to the top end of the lifting rod 7 and is consistent with the extension direction of the first through groove 8. The first sliding block 10 is slidingly connected in the first through groove 8. The top end of the first sliding block 10 is fixed with a screw 11 sliding along the second sliding groove 9. The top end of the screw 11 penetrates out of the second sliding groove 9, and its outside is sleeved with an abutting nut 12 abutting against the top end of the lifting rod 7 in a threaded connection manner. The spring 13 is fixedly connected between the first sliding block 10 and the groove wall of the first through groove 8. The shaft 14 transversely penetrating the first sliding block 10 is rotatably connected to the first sliding block 10 through a bearing. The compression roller 15 is fixed to the front end of the shaft 14 in a concentric and coaxial manner. The driven wheel 16 is fixed to the rear end of the shaft 14.

[0031] The top end of the lifting rod 7 is fixed with a vertical rod 17. The vertical rod 17 is provided with a second through slot 18. The second through slot 18 vertically extends through the vertical rod 17. The second through slot 18 is provided with a second electric telescopic rod 19. The piston rod of the second electric telescopic rod 19 vertically extends upward and is fixed with a second sliding block 20 which slides up and down along the slot wall of the second through slot 18. The front end of the second sliding block 20 is provided with a motor 21. The output shaft of the motor 21 horizontally extends backward and penetrates through the second sliding block 20 and is fixed with a driving wheel 22. The driving wheel 22 and the two driven wheels 16 are connected through a belt transmission.

[0032] Further, the left and right side slot walls of the first sliding slot 4 are both provided with a first longitudinal limiting slot (not shown in the figure). The outer side wall of the lifting block 6 is fixed with a first limiting block (not shown in the figure) which is inserted into the first longitudinal limiting slot and slides up and down along the first longitudinal limiting slot. When the lifting block 6 moves up and down along the first sliding slot 4, the first limiting block slides up and down along the first longitudinal limiting slot. The stability of the lifting block 6 when sliding up and down is improved.

[0033] Further, the left and right side slot walls of the second through slot 18 are both provided with a second longitudinal limiting slot (not shown in the figure). The outer side wall of the second sliding block 20 is fixed with a second limiting block (not shown in the figure) which is inserted into the second longitudinal limiting slot and slides up and down along the second longitudinal limiting slot. When the second sliding block 20 slides up and down along the second through slot 18, the second limiting block slides up and down along the second longitudinal limiting slot. The stability of the second sliding block 20 when sliding up and down is improved.

[0034] Further, the upper and lower side outer walls of the first sliding block 10 are both provided with a plurality of mounting slots (not shown in the figure). The mounting slots are mounted with universal ball bearings (not shown in the figure). One end of the universal ball bearings penetrates through the mounting slots and is in rolling connection with the slot walls of the first through slot 8 (the universal ball bearings at the top end of the first sliding block 10 are staggered with the screw rod 11). The universal ball bearings improve the smoothness of the first sliding block 10 when sliding.

[0035] Further, the left and right side slot walls of the first through slot 8 are fixedly connected with a guide rod 23 which is staggered with the shaft rod 14. The first sliding block 10 is slidingly sleeved on the outside of the guide rod 23, and the spring 13 is sleeved on the outside of the guide rod 23. The first sliding block 10 slides along the guide rod 23 in the first through slot 8. The guide rod 23 prevents the first sliding block 10 from falling out of the first through slot 8 and improves the stability of the first sliding block 10 when sliding.

[0036] Further, the front and rear end slot openings of the first through slot 8 are both fixed with an organ type dustproof folding cloth 24 which covers the first through slot 8. The organ type dustproof folding cloth 24 prevents cotton and other impurities from entering the first through slot 8 and affecting the sliding of the first sliding block 10.

[0037] Working principle:

[0038] The sewing material is placed on the workbench 1. If the size of the cloth is smaller than the interval distance between the two compression rollers 15, first adjust the interval distance between the two compression rollers 15 according to the size of the cloth. Then, retract the piston rod of the first electric telescopic rod 5 to drive the lifting block 6 to move downward along the first sliding groove 4. The lifting block 6 drives the lifting rod 7 to descend. The lifting rod 7 drives the first sliding block 10 to move downward, and the first sliding block 10 drives the shaft rod 14 to move downward. The shaft rod 14 drives the compression roller 15 to move downward. The compression roller 15 compresses the two ends of the sewing material. After sewing is completed, the motor 21 is started, the motor 21 drives the driving wheel 22 to rotate, the driving wheel 22 drives the two driven wheels 16 to rotate synchronously through the belt. The driven wheel 16 drives the shaft rod 14 fixedly connected thereto to rotate. The shaft rod 14 drives the compression roller 15 fixedly connected thereto to rotate, so that the two compression rollers 15 rotate synchronously. The rotating compression roller 15 sends the processed sewing material out and into the sewing material that needs to be processed, avoiding the accumulation of the sewing material on the workbench 1.

[0039] The adjustment process of the interval distance between the two compression rollers 15 is as follows: when it is needed to reduce the interval distance between the two compression rollers 15, first loosen the two abutting nuts 12. Then, extend the piston rod of the second electric telescopic rod 19 to drive the second sliding block 20 to move upward along the second through groove 18. The second sliding block 20 drives the motor 21 and the driving wheel 22 to move upward. Since the driven wheel 16 is connected to the first sliding block 10 through the shaft rod 14, and the screw rod 11 on the first sliding block 10 can only move left and right along the second sliding groove 9, the first sliding block 10 can only slide left and right along the first through groove 8.

[0040] Therefore, after the driving wheel 22 moves upward, the two driven wheels 16 can be moved toward each other through the belt, driving the two shaft rods 14 to move toward each other, driving the two first sliding blocks 10 to move toward each other, and driving the two compression rollers 15 to move toward each other. At the same time, when the first sliding block 10 moves, the spring 13 will be pressed to form a rebound force. After the two compression rollers 15 are moved into position, the abutting nuts 12 are tightened again.

[0041] Similarly, when it is needed to restore the interval distance between the two compression rollers 15, first loosen the two abutting nuts 12. Then, retract the piston rod of the second electric telescopic rod 19 to drive the second sliding block 20 to move downward along the second through groove 18. Under the action of the rebound force of the spring 13, the two first sliding blocks 10 move in the opposite direction, thereby driving the two driven wheels 16 to move in the opposite direction, and the belt is always tensioned between the driving wheel 22 and the two driven wheels 16. At the same time, the two compression rollers 15 will also move in the opposite direction. After the two compression rollers 15 are moved into position, the abutting nuts 12 are tightened again.

[0042] The utility model discloses can according to the size adjustment of cloth the interval distance between two compression roller 15, small size cloth can also be applicable to the utility model for thereby promote the use range of the utility model.

[0043] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeving / connection", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure reference in the claims should not be regarded as limiting the claims involved.

[0046] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A presser foot positioning device for a sewing machine, comprising a workbench (1) and a sewing machine body (2), a support column (3) is fixed to the back side of the workbench (1), the sewing machine body (2) is fixed to the top front side of the support column (3) and located directly above the workbench (1), characterized in that: The rear side of the support column (3) is provided with a first sliding groove (4) extending longitudinally upward and downward, a first electric telescopic rod (5) is installed on the groove bottom wall of the first sliding groove (4), the piston rod of the first electric telescopic rod (5) extends vertically upward and is fixed with a lifting block (6) sliding along the groove wall of the first sliding groove (4) upward and downward, the rear end of the lifting block (6) penetrates out of the first sliding groove (4) and is fixed with a lifting rod (7) extending laterally left and right, two first through grooves (8) symmetrically arranged left and right are formed in the lifting rod (7), the first through grooves (8) vertically penetrate the lifting rod (7) front and back and extend laterally left and right, a second sliding groove (9) is formed in the top end groove wall of the first through groove (8), the second sliding groove (9) leads to the top end of the lifting rod (7) and is consistent with the extension direction of the first through groove (8), a first sliding block (10) is slidably connected in the first through groove (8), a screw rod (11) sliding along the second sliding groove (9) is fixed to the top end of the first sliding block (10), the top end of the screw rod (11) penetrates out of the second sliding groove (9) and is externally threadedly connected with a abutting nut (12) abutting against the top end of the lifting rod (7), a spring (13) is fixedly connected between the first sliding block (10) and the groove wall of the first through groove (8), a shaft rod (14) vertically penetrating the first sliding block (10) is rotatably connected to the first sliding block (10) through a bearing, a compression roller (15) concentrically and coaxially arranged with the shaft rod (14) is fixed to the front end of the shaft rod (14), a driven wheel (16) is fixed to the rear end of the shaft rod (14), a vertical rod (17) is fixed to the top end middle position of the lifting rod (7), a second through groove (18) vertically penetrating the vertical rod (17) front and back and extending longitudinally upward and downward is formed in the vertical rod (17), a second electric telescopic rod (19) is installed on the groove bottom wall of the second through groove (18), the piston rod of the second electric telescopic rod (19) extends vertically upward and is fixed with a second sliding block (20) sliding along the groove wall of the second through groove (18) upward and downward, a motor (21) is installed on the front end of the second sliding block (20), the output shaft of the motor (21) extends horizontally rearward, penetrates the second sliding block (20) and is fixed with a driving wheel (22), the driving wheel (22) and the two driven wheels (16) are drivingly connected through a belt.

2. A presser foot positioning device for a sewing machine according to claim 1, wherein: First longitudinal limiting grooves are formed in the left and right side groove walls of the first sliding groove (4), first limiting blocks are fixed to the outer side walls of the lifting block (6) for being inserted into the first longitudinal limiting grooves and sliding along the first longitudinal limiting grooves upward and downward.

3. A presser foot positioning device for a sewing machine as defined in claim 1, wherein: Second longitudinal limiting grooves are formed in the left and right side groove walls of the second through groove (18), second limiting blocks are fixed to the outer side walls of the second sliding block (20) for being inserted into the second longitudinal limiting grooves and sliding along the second longitudinal limiting grooves upward and downward.

4. The presser foot positioning device of claim 1, wherein: The upper and lower outer walls of the first sliding block (10) are provided with a plurality of installation grooves, universal ball bearings are installed in the installation grooves, and one end of the universal ball bearings penetrates through the installation grooves and is in rolling connection with the groove walls of the first through groove (8).

5. The presser foot positioning device for a sewing machine according to claim 1, wherein: The left and right groove walls of the first through groove (8) are fixedly connected with guide rods (23) that are staggered with the shaft rods (14), the first sliding block (10) is slidably sleeved on the outside of the guide rods (23), and the springs (13) are sleeved on the outside of the guide rods (23).

6. A presser foot positioning device for a sewing machine according to claim 1, wherein: The front and rear end openings of the first through groove (8) are fixedly provided with organ type dustproof folding cloths (24) for covering the first through groove (8).

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