Ejector pin clamping mechanism

Abstract

The utility model relates to the technical field of machine manufacturing, in particular to an ejector pin clamping mechanism which comprises a base, a sliding channel used for arranging an ejector pin is arranged in the upper end of the base, one end of the sliding channel is open, the other end of the sliding channel is closed, the ejector pin is arranged in the sliding channel in a sliding mode, and the ejector pin is arranged in the sliding channel. An opening is formed in the side wall of the base, the head of the ejector pin extends out of the sliding channel from the opening, a compression spring is arranged between the tail of the ejector pin and the closed end, and an adjusting structure connected with the ejector pin is arranged on the side wall of the base and used for driving the ejector pin to move in the length direction of the sliding channel; a locking structure used for locking the ejector pin is arranged on the side wall of the base. The utility model has the beneficial effects that the time for locking and loosening the ejector pin to take a workpiece is effectively shortened, and the processing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical manufacturing technical field especially relates to a ejector pin clamping mechanism. BACKGROUND

[0002] In machining, the slender cantilever structure part usually has the problem of large deformation, which affects the machining size accuracy, and the industry takes measures to set the ejector pin mechanism at the cantilever end, the ejector pin abuts against the end face of the cantilever end of the part, enhances the stability of the part in the machining process, and reduces the machining deformation amount of the part. SUMMARY

[0003] The utility model provides a ejector pin clamping mechanism, realizes quick abutment locking of the part and quick release of the ejector pin, and improves the machining efficiency.

[0004] The utility model discloses a ejector pin clamping mechanism, including base, the upper end inside of base is equipped with the sliding channel for setting the ejector pin, the one end of sliding channel is open, and the other end is closed end, the ejector pin slides in sliding channel, and the head of ejector pin is from open and extends sliding channel, and the tail of ejector pin is equipped with compression spring between closed end, the side wall of base is equipped with the adjusting structure of being connected with ejector pin, for driving ejector pin moves along the length direction of sliding channel, the side wall of base is equipped with the locking structure for locking ejector pin.

[0005] The utility model has the advantages that the compression spring is used to eject the ejector pin and abut against the part, the locking structure is used to lock the ejector pin, so that the part is abutted and locked quickly, when the part needs to be released, the locking mechanism is released, the adjusting structure drives the ejector pin to leave the part, and then the part can be taken out, the utility model effectively reduces the time of abutting and locking the ejector pin and releasing the part, and improves the machining efficiency.

[0006] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0007] Further, the adjusting structure includes a gear rod, the base is provided with an installation channel vertically arranged with the sliding channel in the length direction, the upper part of the installation channel is communicated with the lower part of the sliding channel, the gear rod is rotatably arranged in the installation channel, the bottom of the ejector pin is provided with a rack in the length direction, and the gear rod is engaged with the rack, one end of the gear rod is fixedly connected with one end of a handle.

[0008] The beneficial effect of the further scheme is that the handle drives the axial rotation of the gear rod, the gear rod meshes with the rack, and then drives the movement of the ejector pin, which is convenient to operate.

[0009] Further, the two ends of the gear rod respectively extend from the two ends of the mounting channel, one end of the gear rod is provided with external threads, one end of the handle is fixedly provided with a connecting nut, the connecting nut is threadedly connected with the external threads, a first washer is sleeved on the end of the gear rod away from the handle, and the first washer abuts against the outer wall of the end of the mounting channel.

[0010] The beneficial effect of the further scheme is that the connecting nut is arranged on one end of the handle, which facilitates the detachable fixed connection with the gear rod, and the first washer is arranged to limit the end of the gear rod away from the handle, so that the entire gear rod cannot move to the end connected with the handle and disengage from the mounting channel.

[0011] Further, the pin is arranged to limit the connecting nut and the gear rod after the threaded connection of the connecting nut and the gear rod, so that the relative rotation of the connecting nut and the gear rod is prevented, and the axial rotation of the gear rod is driven synchronously when the handle drives the rotation of the connecting nut.

[0012] The beneficial effect of the further scheme is that the pin is arranged to limit the connecting nut and the gear rod after the threaded connection of the connecting nut and the gear rod, so that the relative rotation of the connecting nut and the gear rod is prevented, and the axial rotation of the gear rod is driven synchronously when the handle drives the rotation of the connecting nut.

[0013] Further, the adjusting structure comprises an adjusting rod, a strip-shaped hole with the same length direction as the length direction of the sliding channel is arranged on the side wall of the base, the strip-shaped hole is connected with the sliding channel, and one end of the adjusting rod is fixedly connected with the side wall of the ejector pin through the strip-shaped hole.

[0014] The beneficial effect of the further scheme is that the adjusting rod is fixedly connected with the ejector pin, and the movement of the adjusting rod along the length direction of the strip-shaped hole can drive the movement of the ejector pin along the length direction of the sliding channel, which is convenient to operate.

[0015] Further, the locking structure comprises a knurled disc screw, a threaded hole communicating with the sliding channel is arranged on the side wall of the base, and the knurled disc screw is threadedly connected in the threaded hole.

[0016] The beneficial effect of the further scheme is that the locking structure adopts the knurled disc screw, the knurled disc screw is tightened or loosened against the ejector pin by rotating the knurled disc screw, and thus the locking or loosening of the ejector pin is realized.

[0017] Further, a strip-shaped groove with the same length direction as the length direction of the ejector pin is arranged on the side wall of the ejector pin, and one end of the knurled disc screw is arranged in the strip-shaped groove.

[0018] The beneficial effect of the further scheme is that the strip-shaped groove can limit the movement of the ejector pin, and when one end of the ejector pin is arranged in the strip-shaped groove, the length of the strip-shaped groove is the movement stroke of the ejector pin, thereby avoiding the ejector pin from being separated from the sliding channel.

[0019] Further, the upper portion of the base is provided with a through hole penetrating through the front and rear ends of the base, a bushing sleeve is fixedly arranged in the through hole, an inner cavity of the bushing sleeve forms the sliding channel, and one end of the bushing sleeve is fixedly provided with a cover to form the closed end.

[0020] The beneficial effect of the further scheme is that the bushing sleeve and the cover can facilitate the installation and disassembly of the ejector pin and the installation of the compression spring.

[0021] Further, a stepped protrusion is arranged on the outer wall of one end of the bushing sleeve away from the cover, the stepped protrusion abuts against the front end face of the base, the bushing sleeve is detachably fixedly connected with the cover through threads, and the cover abuts against the rear end face of the base.

[0022] The beneficial effect of the further scheme is that the stepped protrusion and the cover abut against the front and rear ends of the base, thereby achieving the positioning and installation of the bushing sleeve.

[0023] Further, the bottom of the base is provided with a plurality of vertically arranged connecting holes, bolts are arranged in the connecting holes, and the screw rod ends of the bolts are upwardly threaded through the connecting holes and are threadedly connected with lock nuts.

[0024] The beneficial effect of the further scheme is that the bolts and the lock nuts can facilitate the fixation of the base on a machine tool. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective view of the utility model embodiment one;

[0026] Figure 2 It is a front view of the utility model embodiment one;

[0027] Figure 3 It is a top view of the utility model embodiment one;

[0028] Figure 4 It is an E-E sectional view of the utility model Figure 2 ;

[0029] Figure 5 It is an F-F sectional view of the utility model Figure 3 ;

[0030] Figure 6 It is a schematic view of the internal structure of the base of the utility model;

[0031] Figure 7 Figure 2 is a left sectional view of the embodiment 2 of the utility model;

[0032] In the drawings, the components represented by each reference numeral are listed as follows:

[0033] 1, base; 2, thimble; 3, bushing sleeve; 4, gear bar; 5, handle; 6, pin; 7, cover; 8, bolt; 9, locking nut; 10, knurled disc screw; 11, compression spring; 12, limit bolt; 13, first washer; 14, second washer; 15, connecting nut; 16, stepped projection; 17, sliding channel; 18, mounting channel; 19, rack; 20, adjusting rod; 21, strip hole; 22, strip slot. DETAILED DESCRIPTION

[0034] The principles and features of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and not used to limit the scope of the utility model.

[0035] Embodiment 1

[0036] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , the embodiment includes a base 1, the upper end of the base 1 is internally provided with a sliding channel 17 for setting a thimble 2, one end of the sliding channel 17 is open, and the other end is closed, the thimble 2 is slidingly arranged in the sliding channel 17, and the head of the thimble 2 extends out of the sliding channel 17 from the opening, a compression spring 11 is arranged between the tail of the thimble 2 and the closed end, an adjusting structure connected with the thimble 2 is arranged on the side wall of the base 1, for driving the thimble 2 to move along the length direction of the sliding channel 17, and a locking structure for locking the thimble 2 is arranged on the side wall of the base 1.

[0037] The bottom of the base 1 is provided with a plurality of vertically arranged connecting holes, the plurality of connecting holes are uniformly arranged, a bolt 8 is arranged in each connecting hole, the threaded end of the bolt 8 upwardly penetrates the connecting hole and is threadedly connected with a locking nut 9, and the arrangement of the bolt 8 and the locking nut 9 can facilitate the fixation of the base 1 on a machine tool, when the base 1 is installed on the machine tool, the threaded segment of the bolt 8 is upwardly penetrated through a T-shaped slot arranged on the machine tool, and then is correspondingly penetrated through the connecting hole and locked and fixed on the locking nut 9.

[0038] In the embodiment, the adjusting structure comprises a gear rod 4, the base 1 is provided with an installation channel 18 which is arranged vertically to the sliding channel 17 in the length direction, the upper part of the installation channel 18 is communicated with the lower part of the sliding channel 17, the gear rod 4 is arranged rotatably in the installation channel 18, the bottom of the ejector pin 2 is provided with a rack 19 in the length direction, the rack 19 can be fixed to the bottom of the ejector pin 2 in a fixed manner, or can be arranged integrally with the bottom of the ejector pin 2, that is, a plurality of teeth which are matched with the teeth on the gear rod 4 are arranged in the length direction of the ejector pin 2, the gear rod 4 is engaged with the rack 19, one end of the gear rod 4 is fixedly connected with one end of a handle 5 which extends out of the installation channel 18, the gear rod 4 is driven to rotate axially by the handle 5, the gear rod 4 is engaged with the rack 19, and then the movement of the ejector pin 2 is driven, so that the operation is convenient.

[0039] Both ends of the gear rod 4 extend out of both ends of the installation channel 18, one end of the gear rod 4 is provided with external threads, one end of the handle 5 is fixedly provided with a connecting nut 15, the connecting nut 15 is threadedly connected with the external threads, a first washer 13 is sleeved on the end of the gear rod 4 which is away from the handle 5, the first washer 13 abuts against the outer wall of the end of the installation channel 18, specifically, a limiting hole is arranged on the side wall of the end of the gear rod 4 which is away from the handle 5, the first washer 13 is sleeved on the gear rod 4 and abuts against the outer wall of the end of the installation channel 18, and then a limiting pin 12 is inserted into the limiting hole to prevent the first washer 13 from falling off the gear rod 4. The connecting nut 15 is arranged on one end of the handle 5 to facilitate the detachable fixed connection with the gear rod 4, and the first washer 13 is arranged to limit the end of the gear rod 4 which is away from the handle 5, so that the entire gear rod 4 cannot move to the end connected with the handle 5 and disengage from the installation channel 18.

[0040] In the embodiment, a second washer 14 is further arranged between the connecting nut 15 and the outer wall of the end of the installation channel 18, the second washer 14 is sleeved on the gear rod 4, the connecting nut 15 limits the second washer 14, and the two side walls of the base 1 are clamped by the first washer 13 and the second washer 14 to limit the axial movement of the entire gear rod 4.

[0041] Further comprising a pin 6, one end of the pin 6 penetrates and extends out of the connecting nut 15 and the gear rod 4, the pin 6 is arranged to limit the connecting nut 15 and the gear rod 4 after the threaded connection of the connecting nut 15 and the gear rod 4, so as to prevent the relative rotation of the connecting nut 15 and the gear rod 4, and then enable the gear rod 4 to rotate axially synchronously when the handle 5 drives the connecting nut 15 to rotate. The connecting nut 15 and the end (provided with external threads) of the gear rod 4 are provided with insertion holes in communication with each other, when the connecting nut 15 is rotated to the state that the two insertion holes are in communication with each other, the pin 6 is inserted into the two insertion holes, so as to prevent the relative rotation of the connecting nut 15 and the gear rod 4.

[0042] In the embodiment, the locking structure comprises a knurled disc screw 10, the side wall of the base 1 is provided with a threaded hole in communication with the sliding channel 17, and the knurled disc screw 10 is threadedly connected in the threaded hole. The locking structure adopts the knurled disc screw 10, the knurled disc screw 10 is rotated to abut against or release the thimble 2, so as to realize the locking or releasing of the thimble 2.

[0043] The side wall of the thimble 2 is provided with a strip-shaped slot, the length direction of the strip-shaped slot is the same as the length direction of the thimble 2, and one end of the knurled disc screw 10 is arranged in the strip-shaped slot. The strip-shaped slot 22 is arranged to limit the movement of the thimble 2, when one end of the thimble 2 is arranged in the strip-shaped slot 22, the length of the strip-shaped slot 22 is the movement stroke of the thimble 2, so as to avoid the thimble 2 from being separated from the sliding channel 17.

[0044] In the embodiment, the upper portion of the base 1 is provided with a through hole penetrating through the front and rear ends of the base 1, the bushing sleeve 3 is fixedly arranged in the through hole, the inner cavity of the bushing sleeve 3 forms the sliding channel 17, and the bushing sleeve 3 is fixedly provided with a cover 7 at one end to form the closed end. Through the arrangement of the bushing sleeve 3 and the cover 7, the thimble 2 can be conveniently installed and disassembled, and the compression spring 11 can be conveniently installed.

[0045] One end of the thimble 2 facing the cover 7 and one end of the cover 7 facing the thimble 2 are both provided with counterbores, and the two ends of the compression spring 11 are arranged in the two counterbores respectively.

[0046] The outer wall of the end of the bushing sleeve 3 away from the cover 7 is provided with a stepped protrusion 16, the stepped protrusion 16 abuts against the front end face of the base 1, the bushing sleeve 3 is detachably fixedly connected with the cover 7 through threads, the cover 7 abuts against the rear end face of the base 1, and the stepped protrusion 16 and the cover 7 abut against the front and rear ends of the base 1, so as to realize the positioning installation of the bushing sleeve 3.

[0047] Based on the installation of bushing 3 and cover 7, the bottom of bushing 3 is provided with a notch so that the top of gear rod 4 can pass through and mesh with the bottom of ejector pin 2. Bushing 3 is provided with a through hole for communicating with the threaded hole. One end of knurled disc screw 10 passes through the threaded hole and the through hole in sequence and is located in the strip groove 22.

[0048] Working principle: Step 1, clamp the part on the machine tool fixture, loosen the locking nut 9, adjust the position of the base 1 so that the base 1 is at a suitable distance from one end of the cantilever of the part, and then tighten the locking nut 9 to fix the base 1.

[0049] Step 2: Loosen the knurled disc screw 10. The ejector pin 2 presses against the cantilever end of the part under the action of the compression spring 11. Then tighten the knurled disc screw 10 to lock the ejector pin 2.

[0050] Step 3: Process the part. After processing, loosen the knurled disc screw 10, turn the handle 5 to make the gear rod 4 rotate. At this time, the ejector pin 2 gradually moves away from the cantilever end of the part under the drive of the gear rod 4. Tighten the knurled disc screw 10 to lock the ejector pin 2. At this time, the part can be removed.

[0051] Step four: Repeat steps one through three above to achieve rapid operation of the ejector clamping mechanism.

[0052] Example 2

[0053] like Figure 7 As shown, this embodiment includes a base 1. The upper end of the base 1 has a sliding channel 17 for setting a ejector pin 2. One end of the sliding channel 17 is open, and the other end is closed. The ejector pin 2 is slidably disposed in the sliding channel 17, and the head of the ejector pin 2 extends out of the sliding channel 17 from the open end. A compression spring 11 is provided between the tail end of the ejector pin 2 and the closed end. An adjustment structure connected to the ejector pin 2 is provided on the side wall of the base 1 for driving the ejector pin 2 to move along the length direction of the sliding channel 17. A locking structure for locking the ejector pin 2 is provided on the side wall of the base 1.

[0054] The base 1 has multiple vertically arranged connecting holes at its bottom, which are evenly distributed. Each connecting hole contains a bolt 8, with the threaded end of the bolt 8 passing upward through the connecting hole and threadedly connected to a locking nut 9. The bolt 8 and locking nut 9 facilitate the fixing of the base 1 to the machine tool. When installing the base 1 on the machine tool, the threaded end of the bolt 8 passes upward through the T-slot on the machine tool, and then through the corresponding connecting holes to be locked and fixed with the locking nut 9.

[0055] In the embodiment, the adjusting structure comprises an adjusting rod 20, a strip-shaped hole 21 with the same length direction as the sliding channel 17 is arranged on the side wall of the base 1, the strip-shaped hole 21 is connected with the sliding channel 17, one end of the adjusting rod 20 is fixedly connected with the side wall of the thimble 2 through the strip-shaped hole 21, in order to facilitate the installation and dismounting of the adjusting rod 20 and the thimble 2, the adjusting rod 20 can be detachably fixedly connected with the thimble 2 through screw threads, the adjusting rod 20 is fixedly connected with the thimble 2, and the movement of the adjusting rod 20 along the length direction of the strip-shaped hole 21 can drive the thimble 2 to move along the length direction of the sliding channel 17, so that the operation is convenient.

[0056] In the embodiment, the locking structure comprises a knurled disc screw 10, a threaded hole is arranged on the side wall of the base 1 and communicates with the sliding channel 17, and the knurled disc screw 10 is threadedly connected in the threaded hole, the locking structure adopts the knurled disc screw 10, the knurled disc screw 10 is rotated to abut against or release the thimble 2, so that the locking or releasing of the thimble 2 is realized.

[0057] A strip-shaped groove is arranged on the side wall of the thimble 2, the length direction of the strip-shaped groove is the same as the length direction of the thimble 2, one end of the knurled disc screw 10 is arranged in the strip-shaped groove, the strip-shaped groove 22 can limit the movement of the thimble 2, when one end of the thimble 2 is arranged in the strip-shaped groove 22, the length of the strip-shaped groove 22 is the movement stroke of the thimble 2, and the thimble 2 is prevented from being separated from the sliding channel 17.

[0058] In the embodiment, the upper portion of the base 1 is provided with a through hole penetrating through the front and rear ends of the base 1, a bushing sleeve 3 is fixedly arranged in the through hole, the inner cavity of the bushing sleeve 3 forms the sliding channel 17, and a cover 7 is fixedly arranged at one end of the bushing sleeve 3 to form the closed end, through the arrangement of the bushing sleeve 3 and the cover 7, the installation and dismounting of the thimble 2 are facilitated, and the installation of the compression spring 11 is facilitated.

[0059] The end of the thimble 2 facing the cover 7 and the end of the cover 7 facing the thimble 2 are both provided with counterbores, and the two ends of the compression spring 11 are arranged in the two counterbores respectively.

[0060] A stepped protrusion 16 is arranged on the outer wall of the end of the bushing sleeve 3 away from the cover 7, the stepped protrusion 16 abuts against the front end face of the base 1, the bushing sleeve 3 is detachably fixedly connected with the cover 7 through screw threads, the cover 7 abuts against the rear end face of the base 1, the stepped protrusion 16 and the cover 7 abut against the front and rear ends of the base 1, so that the positioning installation of the bushing sleeve 3 is realized.

[0061] On the basis of installing the bushing sleeve 3 and the cover 7, the strip-shaped hole 21 penetrates the side wall of the bushing sleeve 3, so that the adjusting rod 20 can be fixedly connected with the ejector pin 2 arranged in the bushing sleeve 3 through the side wall of the bushing sleeve 3.

[0062] Working principle: step one, clamp the part on the fixture of the machine tool, loosen the locking nut 9, adjust the position of the base 1, so that the base 1 and the end of the part cantilever are at a suitable distance, then lock the locking nut 9 to fix the base 1;

[0063] Step two, loosen the knurled disc screw 10, the ejector pin 2 is pressed against the end of the part cantilever under the action of the compression spring 11, then tighten the knurled disc screw 10 to lock the ejector pin 2;

[0064] Step three, process the part, after processing, loosen the knurled disc screw 10, push the adjusting rod 20, at this time the ejector pin 2 is driven away from the end of the part cantilever under the driving of the adjusting rod 20, tighten the knurled disc screw 10, lock the ejector pin 2, at this time the part can be removed;

[0065] Step four, repeat the above steps one to three, so as to realize the quick work of the ejector pin clamping mechanism.

[0066] The beneficial effects of the utility model are as follows: the compression spring 11 is used to quickly push out the ejector pin 2 to tightly press against the part, the locking structure is used to quickly lock the ejector pin 2, so as to realize the quick locking of the part; when the part needs to be loosened, the locking mechanism is loosened, the ejector pin 2 is driven away from the part through the adjusting structure, and then the part can be taken out; the utility model effectively reduces the time of locking and loosening the ejector pin 2, and improves the processing efficiency.

[0067] In the description of the utility model, it should be understood that the directions or position relations of the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential direction" are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model.

[0068] In the description of the utility model, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0069] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0070] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0071] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A needle clamping mechanism, characterized by, The base (1) is internally provided with a sliding channel (17) for setting a ejector pin (2) at the upper end of the base (1), one end of the sliding channel (17) is open, the other end is closed, the ejector pin (2) is slidably arranged in the sliding channel (17), and the head of the ejector pin (2) extends out of the sliding channel (17) from the open end, a compression spring (11) is arranged between the tail of the ejector pin (2) and the closed end, an adjusting structure connected with the ejector pin (2) is arranged on the side wall of the base (1) for driving the ejector pin (2) to move along the length direction of the sliding channel (17), and a locking structure for locking the ejector pin (2) is arranged on the side wall of the base (1).

2. A needle clamp mechanism according to claim 1, wherein The adjusting structure comprises a gear rod (4), the base (1) is provided with an installation channel (18) arranged vertically to the length direction of the sliding channel (17), the upper part of the installation channel (18) is communicated with the lower part of the sliding channel (17), the gear rod (4) is rotatably arranged in the installation channel (18), the bottom of the ejector pin (2) is provided with a rack (19) along the length direction, and the gear rod (4) is engaged with the rack (19); one end of the gear rod (4) extends out of the installation channel (18) and is fixedly connected with one end of a handle (5).

3. A needle clamp mechanism according to claim 2, wherein Both ends of the gear rod (4) extend out of both ends of the installation channel (18), one end of the gear rod (4) connected with the handle (5) is provided with external threads, one end of the handle (5) is fixedly provided with a connecting nut (15), the connecting nut (15) is threadedly connected with the external threads, a first washer (13) is sleeved on the end of the gear rod (4) away from the handle (5), and the first washer (13) abuts against the outer wall of the end of the installation channel (18).

4. A needle clamp mechanism according to claim 3, wherein A pin (6) is further arranged, one end of the pin (6) penetrates through and extends out of the connecting nut (15) and the gear rod (4).

5. A needle clamp mechanism according to claim 1, wherein The adjusting structure comprises an adjusting rod (20), the side wall of the base (1) is provided with a strip-shaped hole (21) arranged in the same length direction as the sliding channel (17), the strip-shaped hole (21) is connected with the sliding channel (17), and one end of the adjusting rod (20) penetrates through the strip-shaped hole (21) and is fixedly connected with the side wall of the ejector pin (2).

6. A needle clamp mechanism according to claim 1, wherein The locking structure comprises a knurled disc screw (10), the side wall of the base (1) is provided with a threaded hole communicated with the sliding channel (17), and the knurled disc screw (10) is threadedly connected in the threaded hole.

7. A needle clamp mechanism according to claim 6, wherein The side wall of the ejector pin (2) is provided with a strip-shaped groove (22) arranged in the same length direction as the ejector pin (2), and one end of the knurled disc screw (10) is arranged in the strip-shaped groove (22).

8. A needle clamp mechanism according to any one of claims 1 to 7, wherein The upper portion of the base (1) is provided with a through hole penetrating through the front and rear ends of the base (1), a bushing sleeve (3) is fixedly arranged in the through hole, the inner cavity of the bushing sleeve (3) forms the sliding channel (17), and one end of the bushing sleeve (3) is fixedly provided with a cover (7) to form the closed end.

9. A needle clamp mechanism according to claim 8, wherein A stepped protrusion (16) is arranged on the outer wall of the end of the bushing sleeve (3) away from the cover (7), the stepped protrusion (16) abuts against the front end face of the base (1), the bushing sleeve (3) is detachably fixedly connected with the cover (7) through screw threads, and the cover (7) abuts against the rear end face of the base (1).

10. A needle clamp mechanism according to any one of claims 1 to 7, wherein The bottom of the base (1) is provided with a plurality of vertically arranged connecting holes, bolts (8) are arranged in the connecting holes, the screw rod ends of the bolts (8) penetrate through the connecting holes upwards and are threadedly connected with lock nuts (9).

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