CN219315222U

CN219315222U - Four needle machine elasticity clamping device

Info

Publication number: CN219315222U
Application number: CN202320296941.9U
Authority: CN
Inventors: 柳晓康
Original assignee: Shaanxi Juning Garment Co ltd
Current assignee: Shaanxi Juning Garment Co ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-07-07
Anticipated expiration: 2033-02-23

Abstract

The utility model provides a four-needle machine tightness clamping device, which comprises: the frame, frame both sides top is provided with the box respectively, slides on the inner wall of box bottom and is provided with first splint, and the department rotates through the dwang in the middle of the first splint top to be connected with the second splint, and the cover is equipped with the torsional spring on the dwang, and torsional spring one end is connected with first splint, and the torsional spring other end is connected with the second splint, and two side wall lower parts that the box is close to each other are provided with the opening, and the opening is passed to the closed end of first splint and second splint and is extended out the box, and the second splint top is provided with splint actuating mechanism. The utility model aims to provide a four-needle machine tightness clamping device which is convenient to tightness adjustment and firm in clamping.

Description

Four needle machine elasticity clamping device

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a four-needle machine elastic clamping device.

Background

In the cotton quilt processing production, the combination of the cotton wadding and the quilt cylinder of the cotton quilt is completed by a four-needle machine, and in the four-needle machine production and processing process, cotton quilt cloth is required to be clamped and fixed, so that the cotton quilt cloth is prevented from shifting to generate defective products. For example, patent CN111851032a (application number 202010750503.6) discloses a leather plate stretching machine for realizing tightness clamping based on a magnetic attraction principle, an electromagnet is electrified to generate magnetism, the electromagnet adsorbs electromagnetic gears in a gear channel, the electromagnetic gears roll in the gear channel under the action of the magnetic force, two groups of electromagnetic gears are affected by the magnetic force and are close to each other to drive the two groups of gear channels to bend, a leather main body is not stretched any more, and the leather main body is pulled down, so that the subsequent processing work is facilitated.

However, the leather plate stretching machine that realizes elasticity centre gripping based on magnetism principle that patent CN111851032A disclosed produces magnetism through the electro-magnet circular telegram, promotes the gear passageway to bend and adjusts leather elasticity, and leather plate stretching machine structure is complicated, and the electro-magnet circular telegram produces magnetism and easily produces the trouble, causes magnetism to disappear, is difficult to adjust leather main part elasticity for a long time, causes clamping device's elasticity to adjust inconveniently, and clamping device centre gripping is unstable firm, and simultaneously the gear passageway is bent for a long time and is resumes and easily takes place to damage, causes clamping device inconvenient to use.

Disclosure of Invention

Therefore, the clamping device aims to solve the problems of inconvenient tightness adjustment and unstable clamping of the clamping device in the prior art.

Therefore, the technical scheme adopted by the utility model is that the utility model provides a four-needle machine tightness clamping device, which comprises: the frame, frame both sides top is provided with the box respectively, slides on the inner wall of box bottom and is provided with first splint, and the department rotates through the dwang in the middle of the first splint top to be connected with the second splint, and the cover is equipped with the torsional spring on the dwang, and torsional spring one end is connected with first splint, and the torsional spring other end is connected with the second splint, and two side wall lower parts that the box is close to each other are provided with the opening, and the opening is passed to the closed end of first splint and second splint and is extended out the box, and the second splint top is provided with splint actuating mechanism.

Preferably, the cleat driving mechanism includes: a mounting plate, a moving rod and a moving block,

be provided with the carriage release lever of mounting panel and vertical direction in the box, the carriage release lever bottom passes the mounting panel and is articulated with the second splint top, and the carriage release lever top is provided with the movable block, and the carriage release lever can be on the mounting panel reciprocating motion, and the cover is equipped with first spring on the carriage release lever, and first spring top is connected with the movable block, and first spring bottom is connected with the mounting panel, and the cross-section of movable block is right trapezoid, and hypotenuse one side of movable block is provided with pushing component.

Preferably, the pushing assembly comprises: a pushing block, a first screw rod and a second screw rod,

the box body is internally provided with a first screw rod, one end of the first screw rod is rotationally connected with a pushing block, the other end of the first screw rod penetrates through the side wall of the box body to be connected with a first handle, the first screw rod is in threaded connection with the side wall of the box body, the section of the pushing block is right trapezoid, and the inclined edge of the pushing block is matched with the inclined edge of the moving block.

Preferably, a sliding groove parallel to the first screw is formed in the inner wall of the top end of the box body, the top end of the connecting rod is vertically arranged and is in sliding connection with the sliding groove, the connecting rod can reciprocate in the sliding groove, and the bottom end of the connecting rod is connected with the pushing block.

Preferably, a second screw rod perpendicular to the opening is arranged in the box body, one end of the second screw rod penetrates through the mounting plate to be rotationally connected with the inner wall of the box body, the other end of the second screw rod extends out of the box body to be connected with the second handle, the second screw rod is in threaded connection with the mounting plate, the second screw rod is rotationally connected with the side wall of the box body, guide rods are respectively arranged on two sides of the second screw rod, the guide rods penetrate through the mounting plate, and the mounting plate can reciprocate along the guide rods.

Preferably, flexible pads are distributed on the inner walls of the closed ends of the first clamping plate and the second clamping plate.

Preferably, the surfaces of the pushing block bevel edge and the moving block bevel edge are distributed with wear-resistant coatings.

Preferably, the two sides of the frame are respectively provided with a cavity, the cavities are positioned below the box body, the inner wall of one side of each cavity is provided with a motor, an output shaft of each motor is provided with a driving bevel gear, a transmission shaft in the vertical direction is arranged in each cavity, the bottom end of each transmission shaft is provided with a driven bevel gear, the driven bevel gears are meshed with the driving bevel gears, the top ends of the transmission shafts penetrate through the frame to be connected with the bottom end of the box body, and the transmission shafts are rotationally connected with the frame.

Preferably, the frame top is provided with stop gear, and stop gear includes: a U-shaped frame, wherein the U-shaped frame is provided with a U-shaped frame,

the top end of one side of the frame is provided with a U-shaped frame with a downward opening, a first sliding block and a second sliding block are arranged on a top frame of the U-shaped frame in a sliding mode, limiting plates are arranged at the bottom ends of the first sliding block and the second sliding block respectively, a second spring is sleeved on the top frame of the U-shaped frame and located on one side, far away from the second sliding block, of the first sliding block, one end of the second spring is connected with the first sliding block, and the other end of the second spring is connected with a frame of the U-shaped frame.

Preferably, a rotating shaft is rotationally connected to a side frame of the U-shaped frame, which is close to the first sliding block, the free end of the rotating shaft penetrates through the axis of the grooved pulley to be connected with the handle, the rotating shaft is fixedly connected with the grooved pulley, one end of the belt is connected with the first sliding block, and the other end of the belt bypasses the grooved pulley to be connected with the second sliding block.

The technical scheme of the utility model has the following advantages: according to the utility model, the pushing assembly is arranged to adjust the position of the pushing block, and the position of the moving block is adjusted to enable the clamping plate driving mechanism to apply pressure to the second clamping plate, so that the opening and closing degree of the first clamping plate and the second clamping plate is adjusted, the clamping device is simple in structure and convenient to operate, the clamping force can be adjusted according to the thickness of the cloth, the tightness of the clamping device is convenient to adjust, the cloth is easy to clamp and fix, the damage to the cloth is reduced, and the four-needle machine is convenient to process the cloth; meanwhile, the clamping device is stable in structure, the position of the clamping plate driving mechanism is not suitable to change, the clamping device is firm in clamping, the cloth is not easy to fall off in the processing process, and the production qualification rate of the cloth is improved.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

The technical scheme of the utility model is further described in detail through the drawings and the embodiments.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a view of the torsion spring of the present utility model;

FIG. 3 is a top view of the mounting plate of the present utility model;

FIG. 4 is a schematic view of the torsion spring limiting mechanism of the present utility model;

the device comprises a 1-frame, a 2-box body, a 3-first clamping plate, a 4-rotating rod, a 5-second clamping plate, a 6-torsion spring, a 7-opening, an 8-mounting plate, a 9-moving rod, a 10-moving block, an 11-pushing block, a 13-first screw rod, a 14-first handle, a 15-sliding chute, a 16-connecting rod, a 17-second screw rod, a 18-second handle, a 19-guiding rod, a 20-cavity, a 21-motor, a 22-driving bevel gear, a 23-transmission shaft, a 24-driven bevel gear, a 25-U-shaped frame, a 26-first sliding block, a 27-second sliding block, a 28-rotating shaft, a 29-grooved pulley, a 30-handle, a 31-second spring, a 32-belt and a 33-limiting plate.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present utility model more apparent, preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustrating and explaining the present utility model only and are not limiting the present utility model.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The embodiment of the utility model provides an elastic clamping device of a four-needle machine, which is shown in figures 1-3 and comprises the following components: the device comprises a frame 1, wherein the top ends of two sides of the frame 1 are respectively provided with a box body 2, the inner walls of the bottom ends of the box bodies 2 are provided with a first clamping plate 3 in a sliding manner, the middle part of the top end of the first clamping plate 3 is rotationally connected with a second clamping plate 5 through a rotating rod 4, a torsion spring 6 is sleeved on the rotating rod 4, one end of the torsion spring 6 is connected with the first clamping plate 3, the other end of the torsion spring 6 is connected with the second clamping plate 5, the lower parts of side walls of the two box bodies 2, which are close to each other, are provided with openings 7, the closed ends of the first clamping plate 3 and the second clamping plate 5 extend out of the box bodies 2 through the openings 7, and a clamping plate driving mechanism is arranged above the second clamping plate 5;

the cleat driving mechanism includes: a mounting plate 8, a moving rod 9 and a moving block 10,

a mounting plate 8 and a moving rod 9 in the vertical direction are arranged in the box body 2, the bottom end of the moving rod 9 penetrates through the mounting plate 8 and is hinged with the top end of the second clamping plate 5, a moving block 10 is arranged at the top end of the moving rod 9, the moving rod 9 can reciprocate on the mounting plate 8, a first spring 11 is sleeved on the moving rod 9, the top end of the first spring 11 is connected with the moving block 10, the bottom end of the first spring 11 is connected with the mounting plate 8, the section of the moving block 10 is in a right trapezoid shape, and a pushing component is arranged on one side of a bevel edge of the moving block 10;

the pushing assembly includes: a pushing block 12, a first screw 13,

a first screw rod 13 is arranged in the box body 2, one end of the first screw rod 13 is rotationally connected with a pushing block 12, the other end of the first screw rod 13 penetrates through the side wall of the box body 2 to be connected with a first handle 14, the first screw rod 13 is in threaded connection with the side wall of the box body 2, the section of the pushing block 12 is in a right trapezoid shape, and the inclined edge of the pushing block 12 is matched with the inclined edge of the moving block 10;

the inner wall at the top end of the box body 2 is provided with a chute 15 which is mutually parallel to the first screw rod 13, the top end of a vertically arranged connecting rod 16 is in sliding connection with the chute 15, the connecting rod 16 can reciprocate in the chute 15, and the bottom end of the connecting rod 16 is connected with the pushing block 12.

The working principle of the technical scheme is as follows: when the cloth is required to be clamped, the cloth is paved on the frame 1, the first handle 14 is manually rotated to drive the first screw rod 13 to rotate, the first screw rod 13 is driven to move towards the moving block 10 through the threaded transmission between the first screw rod 13 and the box body 2, the pushing block 12 is driven to move towards the moving block 10, the connecting rod 16 is driven to move towards the moving block 10 along the chute 15, and the connecting rod 16 plays a role in limiting displacement to prevent the moving block 10 from overturning; the pushing block 12 is contacted with the moving block 10 and presses the moving block 10, so that the moving block 10 moves downwards, the moving rod 9 is driven to move downwards, the first spring 11 is compressed, the moving rod 9 moves downwards to apply pressure to the second clamping plate 5, the torsion spring 6 is contracted, the closed ends of the first clamping plate 3 and the second clamping plate 5 are opened, cloth is placed between the first clamping plate 3 and the second clamping plate 5, and then the first handle 14 is reversely rotated, so that the first clamping plate 3 and the second clamping plate 5 clamp the cloth; through the screw thread transmission between first screw rod 13 and box 2, adjust the position of pushing block 12, and then adjust the height of movable block 10 to according to the centre gripping elasticity of cloth thickness regulation first splint 3 and second splint 5.

The beneficial effects of the technical scheme are as follows: according to the utility model, the pushing assembly is arranged to adjust the position of the pushing block, and the position of the moving block is adjusted to enable the clamping plate driving mechanism to apply pressure to the second clamping plate, so that the opening and closing degree of the first clamping plate and the second clamping plate is adjusted, the clamping device is simple in structure and convenient to operate, the clamping force can be adjusted according to the thickness of the cloth, the tightness of the clamping device is convenient to adjust, the cloth is easy to clamp and fix, the damage to the cloth is reduced, and the four-needle machine is convenient to process the cloth; meanwhile, the clamping device is stable in structure, the position of the clamping plate driving mechanism is not suitable to change, the clamping device is firm in clamping, the cloth is not easy to fall off in the processing process, and the production qualification rate of the cloth is improved.

In one embodiment, a second screw rod 17 perpendicular to the opening 7 is arranged in the box body 2, one end of the second screw rod 17 penetrates through the mounting plate 8 to be in rotary connection with the inner wall of the box body 2, the other end of the second screw rod 17 extends out of the box body 2 to be connected with a second handle 18, the second screw rod 17 is in threaded connection with the mounting plate 8, the second screw rod 17 is in rotary connection with the side wall of the box body 2, guide rods 19 are respectively arranged on two sides of the second screw rod 17, the guide rods 19 penetrate through the mounting plate 8, and the mounting plate 8 can reciprocate along the guide rods 19.

The working principle and the beneficial effects of the technical scheme are as follows: when the size of the cloth changes, the second handle 18 is manually rotated to drive the second screw rod 17 to rotate, the mounting plate 8 is driven to move left and right along the second screw rod 17 through the threaded transmission between the second screw rod 17 and the mounting plate 8, the guide rod 19 plays a role in limiting displacement to prevent the mounting plate 8 from rotating, the mounting plate 8 can only move left and right along the guide rod 19, the moving rod 9 is driven to move left and right along the second screw rod 17 to drive the first clamping plate 3 and the second clamping plate 5 to move left and right, the first clamping plate 3 and the second clamping plate 5 extend outwards or shrink inwards, cloth with different sizes is conveniently clamped and fixed, and the four-needle machine is convenient to process the cloth.

In one embodiment, the flexible pads are distributed on the inner walls of the closed ends of the first clamping plate 3 and the second clamping plate 5.

The working principle and the beneficial effects of the technical scheme are as follows: the flexible pad on the first clamping plate 3 and the second clamping plate 5 plays a role in buffering, and the cloth damage caused when the first clamping plate 3 and the second clamping plate 5 clamp the cloth is prevented.

In one embodiment, the surface of the hypotenuse of the pusher block 12 and the hypotenuse of the pusher block 10 are provided with a wear resistant coating.

The working principle and the beneficial effects of the technical scheme are as follows: the wear-resistant coating of the pushing block 12 and the moving block 10 is used for reducing the wear when the pushing block 12 and the moving block 10 rub, and prolonging the service life of the pushing block 12 and the moving block 10.

In one embodiment, cavities 20 are respectively arranged on two sides of the frame 1, the cavities 20 are positioned below the box body 2, a motor 21 is arranged on the inner wall of one side of the cavities 20, a driving bevel gear 22 is arranged on an output shaft of the motor 21, a transmission shaft 23 in the vertical direction is arranged in the cavities 20, a driven bevel gear 24 is arranged at the bottom end of the transmission shaft 23, the driven bevel gear 24 is meshed with the driving bevel gear 22, the top end of the transmission shaft 23 penetrates through the frame 1 to be connected with the bottom end of the box body 2, and the transmission shaft 23 is rotatably connected with the frame 1.

The working principle and the beneficial effects of the technical scheme are as follows: when the position of cloth changes, two motors 21 are started, the motors 21 drive the drive bevel gears 22 to rotate, the driven bevel gears 24 are driven to rotate through gear engagement transmission between the drive bevel gears 22 and the driven bevel gears 24, the transmission shafts 23 are driven to rotate, and the two box bodies 2 are driven to rotate, so that the angles of the two clamping assemblies are adjusted, the cloth is convenient to continue to clamp, and when the two box bodies 2 rotate to a proper angle, the motors 21 are closed, and the application range of the clamping device is improved.

In one embodiment, as shown in fig. 4, a limiting mechanism is disposed at the top end of the stand 1, and the limiting mechanism includes: the U-shaped frame 25 is provided with a pair of support arms,

the top end of one side of the frame 1 is provided with a U-shaped frame 25 with a downward opening, a top frame of the U-shaped frame 25 is provided with a first sliding block 26 and a second sliding block 27 in a sliding manner, the bottom ends of the first sliding block 26 and the second sliding block 27 are respectively provided with a limiting plate 33, the top frame of the U-shaped frame 25 is sleeved with a second spring 31, the second spring 31 is positioned at one side, far away from the second sliding block 27, of the first sliding block 26, one end of the second spring 31 is connected with the first sliding block 26, and the other end of the second spring 31 is connected with a frame of the U-shaped frame 25;

a rotating shaft 28 is rotatably connected to the side frame of the U-shaped frame 25, which is close to the first sliding block 26, the free end of the rotating shaft 28 passes through the axis of the grooved pulley 29 and is connected with a handle 30, the rotating shaft 28 is fixedly connected with the grooved pulley 29, one end of a belt 32 is connected with the first sliding block 26, and the other end of the belt 32 bypasses the grooved pulley 29 and is connected with the second sliding block 27.

The working principle and the beneficial effects of the technical scheme are as follows: before the clamping device clamps the cloth, the handle 30 is manually rotated clockwise to drive the rotating shaft 28 and the grooved pulley 29 to rotate, and the belt 32 is driven to move clockwise along the grooved pulley 29, so that the first sliding block 26 is close to the handle 30 along the top frame of the U-shaped frame 25, the second spring 31 is driven to compress, the second sliding block 27 is far away from the handle 30 along the U-shaped frame 25, and the distance between the two limiting plates 33 is increased; after the cloth is laid on the frame 1, the handle 30 is loosened, the second spring 31 is restored, the first sliding block 26 is far away from the handle 30 along the top frame of the U-shaped frame 25, the belt 32 is driven to move anticlockwise along the grooved pulley 29, the second sliding block 27 is driven to be close to the handle 30 along the U-shaped frame 25, the distance between the two limiting plates 33 is reduced, the cloth is clamped by the two limiting plates 33, the cloth is prevented from being offset, the two clamping devices are convenient to fix the cloth, and meanwhile, after the clamping devices fix the cloth, the two limiting plates 33 prevent the cloth from being wrinkled in the processing process.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. Four needle machine elasticity clamping device, characterized in that includes: frame (1), frame (1) both sides top is provided with box (2) respectively, sliding is provided with first splint (3) on box (2) bottom inner wall, department is connected with second splint (5) through dwang (4) rotation in the middle of first splint (3) top, the cover is equipped with torsional spring (6) on dwang (4), torsional spring (6) one end is connected with first splint (3), torsional spring (6) other end is connected with second splint (5), a side wall lower part that two boxes (2) are close to each other is provided with opening (7), the closed end of first splint (3) and second splint (5) passes opening (7) and extends out box (2), second splint (5) top is provided with splint actuating mechanism.

2. The four-needle machine elastic clamping device as claimed in claim 1, wherein the clamping plate driving mechanism comprises: a mounting plate (8), a moving rod (9) and a moving block (10),

be provided with mounting panel (8) and vertical direction's carriage release lever (9) in box (2), carriage release lever (9) bottom passes mounting panel (8) and second splint (5) top is articulated, carriage release lever (9) top is provided with carriage release lever (10), carriage release lever (9) can reciprocate on mounting panel (8), the cover is equipped with first spring (11) on carriage release lever (9), first spring (11) top is connected with carriage release lever (10), first spring (11) bottom is connected with mounting panel (8), the cross-section of carriage release lever (10) is right trapezoid, hypotenuse one side of carriage release lever (10) is provided with pushing assembly.

3. The four-needle machine elastic clamping device as claimed in claim 2, wherein the pushing assembly comprises: a pushing block (12) and a first screw (13),

be provided with first screw rod (13) in box (2), first screw rod (13) one end rotates and is connected with impeller (12), and first screw rod (13) other end passes box (2) lateral wall and is connected with first handle (14), first screw rod (13) and box (2) lateral wall threaded connection, and the cross-section of impeller (12) is right trapezoid, and the hypotenuse of impeller (12) cooperatees with the hypotenuse of movable block (10).

4. A four-needle machine elastic clamping device as claimed in claim 3, characterized in that a chute (15) parallel to the first screw (13) is arranged on the inner wall of the top end of the box body (2), the top end of a vertically arranged connecting rod (16) is in sliding connection with the chute (15), the connecting rod (16) can reciprocate in the chute (15), and the bottom end of the connecting rod (16) is connected with the pushing block (12).

5. A four-needle machine elastic clamping device as claimed in claim 3, characterized in that a second screw (17) perpendicular to the opening (7) is arranged in the box body (2), one end of the second screw (17) penetrates through the mounting plate (8) to be rotationally connected with the inner wall of the box body (2), the other end of the second screw (17) extends out of the box body (2) to be connected with the second handle (18), the second screw (17) is in threaded connection with the mounting plate (8), the second screw (17) is rotationally connected with the side wall of the box body (2), guide rods (19) are respectively arranged on two sides of the second screw (17), the guide rods (19) penetrate through the mounting plate (8), and the mounting plate (8) can reciprocate along the guide rods (19).

6. The four-needle machine elastic clamping device according to claim 1, wherein flexible pads are distributed on the inner walls of the closed ends of the first clamping plate (3) and the second clamping plate (5).

7. A four-needle machine elastic clamping device as claimed in claim 3, characterized in that the surfaces of the oblique sides of the pushing block (12) and the moving block (10) are provided with wear-resistant coatings.

8. The four-needle machine elastic clamping device according to claim 1, wherein cavities (20) are respectively formed in two sides of the frame (1), the cavities (20) are located below the box body (2), motors (21) are arranged on the inner wall of one side of each cavity (20), driving bevel gears (22) are arranged on output shafts of the motors (21), driving shafts (23) in the vertical direction are arranged in the cavities (20), driven bevel gears (24) are arranged at the bottom ends of the driving shafts (23), the driven bevel gears (24) are meshed with the driving bevel gears (22), the top ends of the driving shafts (23) penetrate through the frame (1) to be connected with the bottom ends of the box body (2), and the driving shafts (23) are connected with the frame (1) in a rotating mode.

9. A four-needle machine elastic clamping device as claimed in claim 1, characterized in that the top end of the frame (1) is provided with a limiting mechanism, which comprises: a U-shaped frame (25),

the U-shaped frame (25) with the downward opening is arranged at the top end of one side of the frame (1), the first sliding block (26) and the second sliding block (27) are arranged on the top frame of the U-shaped frame (25) in a sliding mode, limiting plates (33) are respectively arranged at the bottom ends of the first sliding block (26) and the second sliding block (27), a second spring (31) is sleeved on the top frame of the U-shaped frame (25), the second spring (31) is located at one side, far away from the second sliding block (27), of the first sliding block (26), one end of the second spring (31) is connected with the first sliding block (26), and the other end of the second spring (31) is connected with the frame of the U-shaped frame (25).

10. The four-needle machine elastic clamping device according to claim 9, wherein a rotating shaft (28) is rotatably connected to a side frame of the U-shaped frame (25) close to the first sliding block (26), the free end of the rotating shaft (28) penetrates through the axis of the grooved pulley (29) to be connected with a handle (30), the rotating shaft (28) is fixedly connected with the grooved pulley (29), one end of a belt (32) is connected with the first sliding block (26), and the other end of the belt (32) bypasses the grooved pulley (29) to be connected with the second sliding block (27).