CN217415166U - Needle clamping mechanism and sewing equipment - Google Patents

Abstract

The application discloses press from both sides needle mechanism and sewing machine belongs to combined material insulating layer and sews up technical field. Press from both sides needle mechanism and include the bottom plate, the telescoping cylinder, first guide holder and collet chuck, the telescoping cylinder is fixed in on the bottom plate, first guide holder and telescoping cylinder relatively fixed, the rear end of first guide holder is equipped with first bell mouth, the front end of first guide holder is equipped with the first guiding hole with first bell mouth intercommunication, be equipped with in the collet chuck and press from both sides the pinhole, collet chuck's front end is equipped with and uses to press from both sides a plurality of elastic arms that the pinhole set up as central circumference interval, move through collet chuck drive, make collet chuck's elastic arm and the interior conical surface of the first bell mouth of first guide holder extrude each other, and under the effect of the interior conical surface of first bell mouth. The elastic arm is bent towards the direction of the needle clamping hole of the elastic chuck, so that the suture needle penetrating through the needle clamping hole is clamped and fixed, and the manual clamping of the suture needle is replaced.

Description

Needle clamping mechanism and sewing equipment

Technical Field

The application belongs to the technical field of composite material thermal insulation layer sewing, and particularly relates to a needle clamping mechanism and sewing equipment.

Background

At present, the sewing process of the composite material heat insulation layer of the domestic special-shaped revolving body cabin section mainly adopts a layering and penetrating type manual sewing mode for production, the mode adopts manual production, the production efficiency is low, for the returning special-shaped revolving body cabin section with the diameter of 1m and the height of about 1.6m, the composite material layer laid on the returning special-shaped revolving body cabin section has 4-5 layers, the total thickness reaches 20mm, the diameter of a sewing hole is about 2.5mm, the position is irregularly changed, the sewing work of one cabin section needs tens of thousands of needles, the labor intensity of workers is high, the sewing quality is greatly influenced by manual factors, and high requirements are provided for the skill level and experience of the workers.

In the automatic sewing equipment imitating the manual 209 stitches, the sewing action is as follows: outer needle → inner needle → move to the next hole site → inner needle → outer needle → loop …. The sewing needle and the needle clamping mechanism thereof are core components, two sets of independent multi-axis motion mechanisms are adopted for external needle threading, internal needle receiving and displacement actions as external actuating mechanisms 910, and the needle clamping mechanisms are respectively arranged on the internal and external sets of external actuating mechanisms 910. Due to the limitation of the internal space of the rotary body cabin section, the needle clamping mechanism needs to be designed to be small and exquisite, and the clamping is reliable.

Therefore, a needle clamping mechanism capable of replacing manual needle holding sewing is needed to realize the needle clamping threading function in the automatic sewing of the composite material thermal insulation layer of the profiled revolving body cabin section.

Disclosure of Invention

The application aims to solve the technical problems of high labor intensity and unstable sewing quality of the existing manual sewing at least to a certain extent. To this end, the application provides a needle clamping mechanism and a sewing device.

The needle clamping mechanism provided by the embodiment of the application comprises a needle clamping mechanism;

a bottom plate, a plurality of first connecting plates,

the telescopic cylinder is fixed on the bottom plate and is provided with a telescopic end;

the telescopic cylinder is fixed relative to the first guide seat, the rear end of the first guide seat faces the telescopic end, a first tapered hole is formed in the rear end of the first guide seat, the inner diameter of the first tapered hole is gradually reduced from the rear end of the first guide seat to the front end of the first guide seat, and a first guide hole communicated with the first tapered hole is formed in the front end of the first guide seat;

the elastic chuck is internally provided with a needle clamping hole, the front end of the elastic chuck is provided with a plurality of elastic arms, the elastic arms are circumferentially arranged at intervals by taking the needle clamping hole as a center, and the elastic arms slide in the first conical hole;

and the telescopic end of the telescopic cylinder pushes the elastic arm of the elastic chuck to press the inner conical surface of the first conical hole.

As optional, for better implementation the utility model discloses, the spacing groove has been seted up on collet's the outer wall, be fixed with the limiting plate of radial setting in the first bell mouth, the limiting plate is located in the spacing groove, the width of spacing groove is greater than the thickness of limiting plate.

As optional, for better implementation the utility model discloses, press from both sides needle mechanism still including being fixed in second guide holder on the bottom plate, the front end of second guide holder with the rear end fixed connection of first guide holder, be equipped with in the second guide holder with the second guiding hole of the coaxial intercommunication of first bell mouth, collet's rear end is located in the second guiding hole.

As optional, for better implementation the utility model discloses, the second guide holder is connected with the mounting panel, the mounting panel is fixed in on the bottom plate.

As optional, for better implementation the utility model discloses, sliding connection has the sliding sleeve in the second guiding hole, the rear end of sliding sleeve with flexible end fixed connection, the front end of sliding sleeve is equipped with second toper hole, the internal diameter in second toper hole is followed the front end of sliding sleeve to the rear end direction of sliding sleeve reduces gradually, collet's rear end with second toper hole looks adaptation.

As optional, for better implementation the utility model discloses, press from both sides needle mechanism still includes the ejector pin, the one end of ejector pin with the flexible end fixed connection of telescoping cylinder, the other end of ejector pin insert in the second guiding hole and with the rear end fixed connection of sliding sleeve.

As optional, for better implementation the utility model discloses, the telescoping cylinder is the biax cylinder, the tip fixedly connected with keysets of two telescopic shafts of telescoping cylinder, the ejector pin with keysets fixed connection.

Optionally, for better implementation of the present invention, the free end of the elastic arm is provided with a first external conical surface 421 adapted to the internal conical surface of the first conical hole.

Alternatively, for better implementation of the present invention, the taper of the first tapered hole is 30 °.

The telescopic embodiment also provides a sewing device which comprises the needle clamping mechanism.

The utility model discloses compare in prior art and have following beneficial effect:

the utility model provides a press from both sides needle mechanism passes through the telescoping cylinder drive collet and removes for collet's the elastic arm extrudees each other with the interior conical surface of the first bell mouth of first guide holder, and under the effect of the interior conical surface of first bell mouth. The elastic arm is bent towards the direction of the needle clamping hole of the elastic chuck, so that the suture needle penetrating through the needle clamping hole is clamped and fixed, and the manual clamping of the suture needle is replaced. The needle clamping mechanism is arranged in the sewing equipment, so that the needle clamping and threading functions in the automatic sewing of the composite material heat insulation layer of the special-shaped revolving body cabin section can be realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 shows a schematic structural view of a suture needle;

FIG. 2 is a schematic view showing the structure of the needle clamping mechanism;

FIG. 3 is a schematic cross-sectional view of the first guide housing of FIG. 2;

FIG. 4 is a perspective view of the spring clip of FIG. 2;

FIG. 5 shows a partial enlarged view at A in FIG. 2;

FIG. 6 is a view showing the arrangement of the needle clamping mechanism at the time of the sewing operation.

Reference numerals:

100-a base plate;

200-a telescopic cylinder;

300-a first guide seat; 310-a first tapered hole; 320-a first guide hole; 330-limiting plate

400-collet chuck; 410-clamping a needle hole; 420-a resilient arm; 421-a first external conical surface; 430-open slots; 440-a limiting groove;

500-a second guide holder; 510-a fixed plate; 520-a second pilot hole;

600-a sliding sleeve; 610-a second tapered bore;

700-a top rod; 710-an interposer;

800-suture needle; 810-threading holes;

910-an external actuator; 920-internal actuator; 1000-composite thermal insulation layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indications in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "secured" are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, descriptions in the present application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The application is described below with reference to specific embodiments in conjunction with the following drawings:

example one

The embodiment provides a needle clamping mechanism for clamping a suture needle 800 for suturing a heat insulation layer of a revolving body, so as to solve the technical problem that the labor intensity of manual needle holding and suturing is high when an existing heat insulation layer 1000 of a revolving body composite material is sutured, and the needle clamping mechanism comprises a bottom plate 100, a telescopic cylinder 200, a first guide seat 300 and an elastic chuck 400.

As shown in FIG. 1, the suture needle 800 clamped by the needle clamping mechanism of the present embodiment is made of a 60Si2MnA forging, so that the suture needle 800 has a certain elasticity to reduce the difficulty of the needle clamping mechanism at the end of the inner and outer actuators in completing the needle threading, needle connecting and the like. If the rigidity of the sewing needle is too high, the sewing needle is easy to break when the coaxiality of the guide holes of the two needle clamping mechanisms is poor; if the rigidity of the suture needle is too low, the suture needle is bent under the self-weight because the suture needle is of a slender shaft structure, so that the suture needle cannot penetrate through the small hole in the composite material. The suture needle 800 is cylindrical, both ends of the suture needle 800 are sharpened, and the middle of the suture needle 800 is opened at a threading hole 810 for fixing a suture thread so as to facilitate needle threading, needle receiving, and thread pulling displacement at either end of the suture needle 800.

As shown in fig. 2, the telescopic cylinder 200 is a power tool having a telescopic function and is fixed to the base plate 100. It can be a telescopic cylinder, and also can be a telescopic oil cylinder or an electric push rod. The telescopic cylinder 200 includes a telescopic cylinder 200 body and a telescopic end located at the front end of the telescopic cylinder 200 body. The needle clamping mechanism can be controlled to clamp the suture needle 800 when the telescopic end of the telescopic cylinder 200 is in the extended state, or the needle clamping mechanism can be controlled not to clamp the suture needle 800 when the telescopic end of the telescopic cylinder 200 is in the retracted state.

As shown in fig. 2 and 3, the first guide holder 300 and the telescopic cylinder 200 are fixed to each other, and the first guide holder 300 may be directly fixed to the base plate 100 or the first guide holder 300 may be indirectly fixed to the base plate 100 through the second guide holder 500 and the fixing plate 510. The rear end of the first guide base 300 faces the telescopic end of the telescopic cylinder 200, and the rear end of the first guide base 300 is provided with a first tapered hole 310, and the axial direction of the first tapered hole 310 is the same as the telescopic direction of the telescopic end of the telescopic cylinder 200. The inner diameter of the first tapered hole 310 is gradually reduced from the rear end of the first guide holder 300 toward the front end of the first guide holder 300, thereby forming a throat structure. The front end of the first guide holder 300 is opposite to the rear end of the first guide holder 300, the front end of the first guide holder 300 is provided with a first guide hole 320 for inserting the suture needle 800, the first guide hole 320 is communicated with the first tapered hole 310, the first guide hole 320 is coaxially arranged with the first tapered hole 310, the first guide hole 320 is in clearance fit with the suture needle 800, so that the suture needle 800 can penetrate through the first guide hole 320 to enter the first tapered hole 310, meanwhile, the first guide hole 320 can provide supporting force for the circumferential direction of the suture needle 800, and the occurrence of bending deformation of the suture needle 800 is reduced

As shown in fig. 3 and 4, the collet 400 is a core part of a needle clamping mechanism for clamping the suture needle 800. The front end of the collet 400 is provided with a clamping pin hole 410, and the opening direction of the clamping pin hole 410 is the axial direction of the collet 400. The pin clamping hole 410 may be a through hole penetrating through the front end and the rear end opposite to the front end of the collet 400, and the pin clamping hole 410 may also be a blind hole. Either end of the suture needle 800 can be inserted into the clip hole 410. And, the front end of the collet 400 is provided with a plurality of open grooves 430, the plurality of open grooves 430 are arranged along the axial direction of the collet 400, and opposite sidewalls of the open grooves 430 are communicated with the first clip hole 410 and the outer wall of the collet 400, so that the front end of the collet 400 forms a plurality of elastic arms 420 through the plurality of open grooves 430, and the plurality of elastic arms 420 are circumferentially arranged at intervals with the clip hole 410 as a center. The free ends of the elastic arms 420 extend into the first tapered hole 310 from the rear end of the first tapered hole 310, the free ends of the elastic arms 420 are attached to the inner conical surface of the first tapered hole 310, and the needle clamping holes 410 of the collet 400 are coaxially arranged with the first guide hole 320. When the telescopic end of the elastic telescopic cylinder 200 extends out, the telescopic end of the telescopic cylinder 200 is connected with the elastic chuck 400, and when the front end of the elastic chuck 400 slides towards the front end of the guide seat, the elastic arm 420 bends towards the position of the needle clamping hole 410 under the guiding and limiting effects of the first tapered hole 310, so that the aperture of the needle clamping hole 410 is reduced, and the suture needle 800 inserted into the needle clamping hole 410 is clamped and fixed. When the telescopic end of the elastic telescopic cylinder 200 is retracted, the front end of the collet 400 moves toward the rear end of the guide base under the elastic force of the elastic arm 420, thereby increasing the aperture of the needle clamping hole 410 and releasing the clamping of the collet 400 on the suture needle 800.

The clamping of the sewing needle 800 through the needle clamping mechanism can replace manual clamping of the sewing needle 800, meanwhile, when the composite material heat insulation layer 1000 of the cabin section of the revolving body is sewn, the needle clamping mechanisms are respectively arranged inside and outside the cabin section of the revolving body, a sewing thread is fixed on the sewing needle 800, a 209-stitch sewing mode is adopted, the sewing needle 800 can be clamped after penetrating through the outer side and the inner side of the heat insulation layer of the sewing material through the two needle clamping mechanisms, and manual sewing is replaced.

It should be noted that the first tapered hole 310 may be a conical hole or a square tapered hole, in this embodiment, the first tapered hole 310 is preferably a conical hole, which not only enables the elastic arm 420 to be matched with any inner conical surface of the first tapered hole 310, but also enables the first tapered hole to be more conveniently processed.

In this embodiment, the front end of the elastic arm 420 is provided with a first outer tapered surface 421 adapted to the inner tapered surface of the first tapered hole 310. Such that the resilient arms 420 form mating wedge surfaces with the first tapered bore 310, the inner tapered surfaces of the first tapered bore 310 can provide greater pressure on the resilient arms 420 as the collet 400 is moved into the first tapered bore 310 to cause the free ends of the resilient arms 420 to collapse and grip the suture needle 800.

Preferably, the taper of the inner tapered surface of the first tapered hole 310 is 30 °, and correspondingly, the taper of the first outer tapered surface 421 of the resilient arm 420 is also 30 °.

Further, in the present embodiment, the distances between the elastic arms 420 are equal, so that when the needle clamping mechanism clamps the suture needle 800, the elastic arms 420 can be uniformly pressed against the circumferential surface of the suture needle 800, thereby improving the stability of the needle clamping mechanism after clamping the suture needle 800.

Preferably, the number of the elastic arms 420 is eight, and one side of the elastic arms 420 facing the needle clamping hole 410 is an arc-shaped surface, so that when the elastic arms 420 clamp the suture needle 800, the arc-shaped surface can have a larger contact area with the suture needle 800, thereby having a larger friction force when clamping the suture needle 800, and further preventing the suture needle 800 from sliding.

In addition, in the present embodiment, the front end of the first guide holder 300 is provided with a tapered guide port, and the guide port communicates with the first guide hole 320, so that the guide port can guide the end of the suture needle 800 into the first guide hole 320 when the suture needle 800 is inserted into the first guide holder 300.

Further, in the present embodiment, a limiting groove 440 is disposed on an outer side wall of the elastic arm 420, where the outer side wall of the elastic arm 420 is a side wall of the elastic arm 420 facing away from the needle clamping hole 410, and a side wall of the elastic arm 420 facing toward the needle clamping hole 410 is an inner side wall of the elastic arm 420. The retaining grooves 440 of the plurality of resilient arms 420 collectively define an annular groove disposed radially along the collet 400. The limiting plate 330 is fixed to the rear end of the first guide holder 300, the limiting plate 330 is an annular limiting plate 330, a limiting hole communicated with the first tapered hole 310 is formed in the center of the limiting plate 330, the aperture of the limiting hole is matched with the diameter of the groove bottom of the annular groove in the collet 400 in a natural state, and the thickness of the limiting plate 330 is smaller than the width of the limiting groove 440. After the elastic arm 420 of the collet 400 is squeezed, the head end of the collet 400 can pass through the limiting hole, the limiting plate 330 is located in the limiting groove 440, the groove bottom of the limiting groove 440 can guide the collet 400 in the sliding process of the collet 400, the collet 400 can slide along the axial direction of the first guide seat 300, and the two side walls of the limiting groove 440 can limit the collet 400 in the sliding process of the collet 400, so that the collet 400 is prevented from being separated from the first guide seat 300.

The processing method of the limiting groove 440 on the elastic arm 420 is to firstly form an annular groove on the outer peripheral surface of the collet 400, form the above-mentioned open groove 430 on the front end of the collet 400, and divide the annular groove after the open groove 430 passes through the annular groove, so that a part of the arc-shaped groove section of the limiting groove 440 of the annular structure is formed on the outer wall of each elastic arm 420.

It should be noted that, when the collet 400 moves in the first taper hole, the clamping of the suture needle 800 can be realized only by moving a certain distance, and the width of the limiting groove 440 should be greater than the moving distance required by the collet 400 to clamp the suture needle 800, so that the limiting plate 330 is located in the limiting groove 440 no matter the collet 400 is in the clamped state or the unclamped state with respect to the suture needle 800.

Further, in this embodiment, the needle clamping mechanism further includes a second guide holder 500 fixed on the bottom plate 100, and a front end of the second guide holder 500 is fixed to a rear end of the first guide holder 300 through a threaded connection, so that the first guide holder 300 is fixed on the bottom plate 100 through the second guide holder 500. A second guide hole 520 coaxially communicating with the first tapered hole 310 is formed in the second guide holder 500, and the diameter of the second guide hole 520 is larger than that of the collet 400, so that the rear end of the collet 400 can move in the second guide hole 520.

In this embodiment, the second guide holder 500 is fixedly connected to the base plate 100 through a mounting plate, specifically, an internal threaded hole is formed in the mounting plate, an external thread is formed at the rear end of the second guide holder 500 and is threadedly connected to the internal threaded hole in the mounting plate, and the mounting plate is fixed to the base plate 100 through a bolt.

In some embodiments, the second guide seat 500 and the mounting plate may also be welded or integrally formed.

Further, a sliding sleeve 600 is installed in the second guide hole 520, the outer wall of the sliding sleeve 600 is slidably connected with the second guide hole 520, and the rear end of the sliding sleeve 600 is fixedly connected with the telescopic end of the telescopic cylinder 200, so that the sliding sleeve 600 can move along with the telescopic action of the telescopic cylinder 200. The front end of the sliding sleeve 600 is provided with a second taper hole, the second taper hole is coaxial with the collet 400, and the inner diameter of the second taper hole gradually decreases from the front end of the sliding sleeve 600 to the rear end of the sliding sleeve 600. In addition, the outer wall of the collet 400 is tapered, the rear end of the collet 400 is adapted to the second tapered hole, and when the sliding sleeve 600 slides in the direction of the first tapered hole 310, the rear end of the collet 400 is inserted into the second tapered hole, so that the collet 400 is automatically aligned, the axis of the collet 400, the axis of the first guide hole 320 and the axis of the second tapered hole are located on the same line, and the phenomenon that the suture needle 800 cannot enter the needle clamping hole 410 due to the deflection of the collet 400 is avoided.

Preferably, the outer wall of the resilient arm 420 is also tapered and adapted with the second tapered hole, so that the second tapered hole can play a role of assisting in compressing the resilient arm 420 when the second tapered hole interacts with the collet 400.

Further, the clamping mechanism further comprises a push rod 700, one end of the push rod 700 is fixedly connected with the telescopic end of the telescopic cylinder 200, and the other end of the push rod 700 is inserted into the second guide hole 520 and connected with the rear end of the sliding sleeve 600. Moreover, because the internal space of the revolving body cabin section is limited, a telescopic cylinder 200 with small volume and strong thrust needs to be selected, in this embodiment, a double-shaft cylinder is selected as the telescopic cylinder 200, the double-shaft cylinder has two synchronously telescopic ends arranged in the same direction, the two telescopic end parts of the double-shaft cylinder are connected with an adapter plate 710, and the ejector rod 700 is in threaded connection with the adapter plate 710, so that the ejector rod 700 is connected with the two telescopic ends of the double-shaft cylinder through the adapter plate 710, the thrust when the double-shaft cylinder is stretched out is applied to the ejector rod 700, and the elastic chuck 400 is pushed by the ejector rod 700.

Example 2

The present embodiment provides a suturing apparatus including the needle clamping mechanism of embodiment 1. The sewing operation of the revolving body long and short composite material heat insulation layer 1000 can be realized by the sewing equipment.

As shown in fig. 5, specifically, the sewing device is an automated sewing device imitating manual 209 stitches, two needle clamping mechanisms in the sewing device are respectively arranged outside and inside the rotary body cabin section, the sewing device further comprises an external actuator 910 and an internal actuator 920, the external actuator 910 is located outside the rotary body cabin section and fixed to a corresponding needle clamping mechanism, and the internal actuator 920 is located inside the rotary body cabin section and fixed to a corresponding needle clamping mechanism. The external actuator 910 and the internal actuator 920 can respectively drive the corresponding needle clamping mechanism to integrally move.

In the needle threading process, a plurality of needle threading holes for needle threading are arranged on the composite material heat insulation layer 1000 and the revolving body cabin section in advance. After the needle clamping mechanism located outside the cabin section of the revolving body clamps the suture needle 800, the external actuating mechanism 910 drives the needle clamping mechanism to move integrally towards the composite material heat insulation layer 1000, so that one end of the suture needle 800 penetrates through one needle penetrating hole and enters the collet chuck 400 of the needle clamping mechanism located inside the cabin section of the revolving body to be clamped and fixed by the collet chuck 400, and then the needle clamping mechanism located outside the cabin section of the revolving body loosens the other end of the suture needle 800 and moves to the next needle penetrating hole to stand by, so that the needle penetrating operation from the outside to the inside is realized. The needle clamping mechanism located inside the rotary body cabin section is driven by the internal execution mechanism 920 to be far away from the composite material heat insulation layer 1000, so that the sewing needle 800 completely enters the rotary body cabin section, and then the internal execution mechanism 920 drives the needle clamping mechanism to move to a next needle penetrating hole and is arranged opposite to the needle clamping mechanism located outside the rotary body cabin section, and therefore needle penetrating operation from the inside to the outside is achieved. The steps are repeated, and the sewing of the composite material heat insulation layer 1000 of the special-shaped revolving body cabin section can be realized through the sewing equipment.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Claims (10)

1. A needle clamping mechanism is characterized by comprising;

a bottom plate, a plurality of first connecting plates,

the telescopic cylinder is fixed on the bottom plate and is provided with a telescopic end;

the rear end of the first guide seat faces the telescopic end, a first tapered hole is formed in the rear end of the first guide seat, the inner diameter of the first tapered hole is gradually reduced from the rear end of the first guide seat to the front end of the first guide seat, and a first guide hole communicated with the first tapered hole is formed in the front end of the first guide seat;

the elastic chuck is internally provided with a needle clamping hole, the front end of the elastic chuck is provided with a plurality of elastic arms, the elastic arms are circumferentially arranged at intervals by taking the needle clamping hole as a center, and the elastic arms slide in the first conical hole;

and the telescopic end of the telescopic cylinder pushes the elastic arm of the elastic chuck to press the inner conical surface of the first conical hole.

2. The needle clamping mechanism according to claim 1, wherein a limiting groove is formed in an outer wall of the elastic chuck, a radially arranged limiting plate is fixed in the first tapered hole, the limiting plate is located in the limiting groove, and the width of the limiting groove is greater than the thickness of the limiting plate.

3. The needle clamping mechanism according to claim 1, further comprising a second guide seat fixed on the bottom plate, wherein a front end of the second guide seat is fixedly connected with a rear end of the first guide seat, a second guide hole coaxially communicated with the first tapered hole is formed in the second guide seat, and a rear end of the elastic chuck is located in the second guide hole.

4. The needle clamping mechanism according to claim 3, wherein a mounting plate is connected to the second guide base, and the mounting plate is fixed on the bottom plate.

5. The needle clamping mechanism according to claim 3, wherein a sliding sleeve is slidably connected in the second guide hole, the rear end of the sliding sleeve is fixedly connected with the telescopic end, a second tapered hole is formed in the front end of the sliding sleeve, the inner diameter of the second tapered hole is gradually reduced from the front end of the sliding sleeve to the rear end of the sliding sleeve, and the rear end of the collet is matched with the second tapered hole.

6. The needle clamping mechanism according to claim 5, further comprising a push rod, wherein one end of the push rod is fixedly connected with the telescopic end of the telescopic cylinder, and the other end of the push rod is inserted into the second guide hole and is fixedly connected with the rear end of the sliding sleeve.

7. The needle clamping mechanism according to claim 6, wherein the telescopic cylinder is a double-shaft cylinder, adapter plates are fixedly connected to the end portions of two telescopic ends of the telescopic cylinder, and the ejector rod is fixedly connected with the adapter plates.

8. The needle clamping mechanism of claim 1, wherein the free ends of the resilient arms are provided with a first external tapered surface adapted to the internal tapered surface of the first tapered bore.

9. The needle clamping mechanism of claim 8 wherein the taper of the first tapered bore is 30 °.

10. A suturing device comprising the needle clamping mechanism of any one of claims 1-9.

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