CN213003842U

CN213003842U - Novel front push barrel clamp

Info

Publication number: CN213003842U
Application number: CN202021136943.4U
Authority: CN
Inventors: 陈圣杰; 姜少飞
Original assignee: Ningbo Pinshang Precision Machine Tool Co ltd
Current assignee: Ningbo Pinshang Precision Machine Tool Co ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-04-20
Anticipated expiration: 2030-06-18

Abstract

The utility model provides a novel preceding push cylinder presss from both sides belongs to the technical field of anchor clamps. A novel front push collet comprises a collet adapter, a gland, a sliding sleeve, a collet, a pressure ring and a connecting ring; the utility model discloses an install the sliding sleeve, the collet chuck, a plurality of screw holes have been seted up along its axial on the terminal surface of the one end of the chuck adapter of clamping ring and go-between, and the one end that is provided with the screw hole in the chuck adapter is provided with the gland that supports tight collet chuck, and set up a plurality of connecting holes with the screw hole one-to-one on the gland, and connecting hole and screw hole pass through bolted connection, make the atress direction of chuck adapter and gland be respective axial, the wall body thickness of the junction on the atress direction has been increased, the risk of atress deformation has been reduced, also make simultaneously the atress of gland can not direct action on the screw thread of screw hole, avoided gland deformation and leaded to the gland to dismantle inconvenient problem, do benefit to the change and subsequent maintenance of collet.

Description

Novel front push barrel clamp

Technical Field

The utility model relates to a technical field of anchor clamps specifically is a novel push away collet chuck.

Background

In the machining process of a workpiece, a clamp is usually used, a raw material or blank workpiece to be machined is clamped on a main shaft by the clamp, and the raw material or blank workpiece is driven to rotate by the main shaft, so that the machining operation of the workpiece is realized.

The collet chuck is one of the current common clamps, is convenient to clamp and can meet the clamping requirements of tools such as a plurality of workpieces or drills. The sliding sleeve is required to be pushed to slide by the existing forward pushing collet chuck, the sliding sleeve slides on the collet chuck, the movement of the collet chuck is limited by the pressing cover, so that the sliding sleeve and the collet chuck move relatively, and the size of the aperture of the collet chuck is changed through the interaction of the wedge-shaped surfaces on the collet chuck of the sliding sleeve and the collet chuck, so that the clamping and the releasing are realized. However, the inboard of the one end of the gland of current preceding push-forward collet chuck is whole to be provided with the internal thread, direct spiro union is on the chuck adapter of installation sliding sleeve through the internal thread of its one end, make the change to the collet chuck be realized to accessible dismouting gland, however, the gland is in the use, the wall body that the gland was provided with the one end of internal thread is thinner, and the gland is in the pressurized state for a long time, or appear colliding and the back of warping in the use, easily lead to the gland to pull down from the chuck adapter, be unfavorable for the change of collet chuck and the maintenance in later stage, be unfavorable for the use and the popularization of product.

Disclosure of Invention

Aiming at the problems in the prior art, the aim is to provide a novel forward-push collet chuck, wherein a plurality of threaded holes are formed in the end face of one end, matched with a gland, of a collet adapter, a plurality of through connecting holes are formed in the gland along the axial direction of the end face, the plurality of connecting holes are in one-to-one correspondence with the plurality of threaded holes and are connected through bolts, so that the stress direction of the gland is along the axial direction of the end face, the wall thickness of the connecting part of the gland in the stress direction is effectively increased, the pressure applied to the gland is not directly applied to the threads of the threaded holes but is indirectly connected with the collet adapter through the bolts, the risk of the compression or collision deformation of the gland is reduced, meanwhile, more connecting points of the gland and the collet adapter are provided, the flexibility is higher, the gland can be conveniently disassembled and assembled even if slightly deformed, the collet chuck can be conveniently, is more beneficial to the use and popularization of the product.

The specific technical scheme is as follows:

a novel push-forward collet having features comprising: the chuck adapter is arranged in a cylindrical shape, a plurality of threaded holes axially arranged along the threaded holes are arranged on the end face of one end of the chuck adapter in an annular array, the gland is arranged at one end of the chuck adapter provided with the threaded holes, the gland is arranged in a circular shape, a chuck extending hole is formed in the center of the gland, a plurality of connecting holes axially penetrating through the gland are arranged on the edge of the gland in an annular array, one connecting hole corresponds to one threaded hole, the corresponding connecting hole and the corresponding threaded hole are connected through a bolt, meanwhile, the sliding sleeve is arranged in the hollow of the chuck adapter in a sliding mode and is also arranged in a cylindrical shape, a first wedge-shaped surface is arranged on the inner wall of the sliding sleeve and at one end close to the gland, the collet is arranged in the hollow of the sliding sleeve, the end of the collet close to the gland is a chuck, and the outer wall of the collet is, and, the chuck leans on in the gland near the one end of gland, and simultaneously, just be located one side that the sliding sleeve deviates from the gland in the cavity of chuck adapter and be provided with the clamping ring to one side that deviates from the sliding sleeve in the clamping ring is provided with the go-between.

Foretell novel collet chuck that pushes away before, wherein, the one end that the chuck is close to the gland is the notch cuttype setting, forms the step between the one end that the chuck cross-section is big and the little one end in cross-section, and the second wedge sets up in the one end that the cross-section is big, and the chuck that the little one end in cross-section stretched into the gland stretches out downtheholely, and the step supports to lean on the gland.

The novel forward-pushing collet chuck is characterized in that a first positioning inclined plane is arranged on an opening of a gland, which is located on one side, close to the large cross section of the collet, of the collet extending hole, and a second positioning inclined plane matched with the first positioning inclined plane is arranged on a step formed between one end, large in cross section, of the collet and one end, small in cross section, of the collet.

Foretell novel preceding collet chuck, wherein, the chuck adapter deviates from the one end that is provided with the screw hole and is the flange structure setting, and the flange is structural that annular array distributes and has a plurality of mounting holes.

The novel forward-pushing collet chuck is characterized in that a hollow limiting hole communicated with a collet adapter is radially formed in the middle of the collet adapter along the collet adapter, a limiting screw is screwed in the limiting hole, meanwhile, a waist-shaped hole corresponding to the limiting hole is formed in the outer wall of the sliding sleeve along the axial direction of the sliding sleeve, and one end of the limiting screw stretches into the waist-shaped hole.

The novel forward-pushing collet chuck is characterized in that the connecting hole in the gland and the limiting hole in the collet chuck adapter are both countersunk holes.

The utility model provides a foreward push collet chuck, wherein, the clamping ring is circular setting, the clamping ring is including cup jointing portion and the portion that compresses tightly, one side of the portion that compresses tightly is supported and is leaned on the one end that deviates from the gland in the sliding sleeve, one side that the portion that compresses tightly deviates from the sliding sleeve is provided with the portion of cup jointing along its axial arrangement, and cup joint the setting of a tubiform, and simultaneously, the external diameter of the portion of cup jointing is less than the external diameter of the portion that compresses tightly, the portion that compresses tightly supports and is provided with the location arch in one side of sliding sleeve, the sliding sleeve supports with the.

The utility model provides a foreward push away collet chuck, wherein, the go-between is the annular setting, the go-between is including supporting tight portion and sealing, support tight portion cover locate outside the portion of cup jointing and be located between portion of cup jointing and the chuck adapter, and support one side of tight portion and support and lean on in the portion of compressing tightly, the sealing sets up and supports in supporting one side that tight portion leaned on in the portion of compressing tightly, and simultaneously, the sealing stretches into in the clearance between sliding sleeve and the chuck adapter, and, support tight portion and be located and all seted up the seal groove near one side of chuck adapter on one side and the sealing of being close to the portion of cup jointing, all be provided with the sealing washer in the.

The positive effects of the technical scheme are as follows:

foretell novel collet chuck of advancing, be provided with on the terminal surface through the one end at the chuck adapter of installing the collet chuck along its axial a plurality of screw holes, simultaneously, be provided with a plurality of connecting holes that correspond along its axial on the gland, it passes through bolt indirect connection to have realized gland and chuck adapter, and the direction of connection is respective axial, not only effectively increased the wall body thickness of junction, the risk of structural deformation has been reduced, and simultaneously, also make the power that the gland received not directly act on the screw thread of the screw hole of chuck adapter, but through the indirect transmission of a plurality of bolts, the flexibility of structure has been increased, make and still can follow the collet adapter with the gland under the long-time atress of gland or the condition such as collision deformation and pull down, the change and the later maintenance of collet chuck have been made things convenient for, more do benefit to the use and the popularization of.

Drawings

Fig. 1 is a structural view of an embodiment of a novel forward-push collet of the present invention;

FIG. 2 is a block diagram of a chuck adapter according to a preferred embodiment of the present invention;

FIG. 3 is a schematic view of the gland of a preferred embodiment of the present invention;

FIG. 4 is a structural diagram of a sliding sleeve according to a preferred embodiment of the present invention;

fig. 5 is a structural diagram of a pressure ring according to a preferred embodiment of the present invention;

fig. 6 is a structural view of a connection ring according to a preferred embodiment of the present invention.

In the drawings: 1. a collet adapter; 11. a threaded hole; 12. a flange structure; 13. a limiting hole; 121. mounting holes; 2. a gland; 21. a chuck extends out of the hole; 22. connecting holes; 211. a first positioning inclined plane; 3. a sliding sleeve; 31. a first wedge-shaped face; 32. a kidney-shaped hole; 33. caulking grooves; 4. pressing a ring; 41. a socket joint part; 42. a pressing part; 421. positioning the projection; 5. a connecting ring; 51. a tightening part; 52. a sealing part; 53. a sealing groove; 6. a collet; 61. a chuck; 611. a second wedge-shaped face; 612. a step; 613. a second positioning ramp.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically described with reference to fig. 1 to 6, but the following contents are not intended to limit the present invention.

Fig. 1 is a structural diagram of an embodiment of the novel forward-push collet of the present invention. As shown in fig. 1 and 2, the present embodiment provides a novel forward collet chuck, which comprises: the chuck adapter 1, the gland 2, the sliding sleeve 3, the collet 6, the pressure ring 4 and the connecting ring 5 are arranged, the gland 2 is arranged at one end of the chuck adapter 1, and the sliding sleeve 3, the collet 6, the pressure ring 4 and the connecting ring 5 are arranged in the chuck adapter 1.

FIG. 2 is a block diagram of a chuck adapter according to a preferred embodiment of the present invention; FIG. 3 is a schematic view of the gland of a preferred embodiment of the present invention; fig. 4 is a structural diagram of the sliding sleeve according to a preferred embodiment of the present invention. As shown in fig. 1 to 4, the collet adapter 1 is disposed in a cylindrical shape, a plurality of threaded holes 11 axially disposed along the axial direction are disposed in an annular array on an end surface of one end of the collet adapter 1, and the gland 2 is disposed at one end of the collet adapter 1 where the threaded holes 11 are disposed, so that the subsequent gland 2 can be conveniently mounted on the collet adapter 1 through the arrangement of the threaded holes 11. Meanwhile, the gland 2 is arranged in a circular shape, the center of the gland 2 is provided with the chuck extending hole 21, and the subsequent workpieces to be processed, drill bits and other processing tools can extend out of the chuck extending hole 21 conveniently through the arrangement of the chuck extending hole 21, so that conditions are provided for the subsequent processing. In addition, a plurality of connecting holes 22 which penetrate through along the axial direction of the gland 2 are arranged on the edge of the gland 2 in an annular array, each connecting hole 22 corresponds to one threaded hole 11, and the corresponding connecting holes 22 and the corresponding threaded holes 11 are connected through bolts, namely, the gland 2 and the chuck adapter 1 are connected by penetrating the connecting holes 22 through the bolts and being screwed on the threaded holes 11, so that the gland 2 and the chuck adapter 1 adopt an indirect connection mode of bolt connection, the gland 2 is prevented from being stressed and directly acting on the threads of the threaded holes 11 of the chuck adapter 1, the number of the joints is increased, the structure flexibility is higher, the stress directions of the gland 2 and the chuck adapter 1 are all along the respective axial directions, the wall body thickness of the joints in the stress direction is increased, the risk of deformation of the gland 2 is reduced, and the gland 2 can be smoothly dismounted from the chuck adapter 1 under the condition that the gland 2 is deformed, the collet chuck 6 is convenient to replace and maintain, and is more convenient to use. Meanwhile, the sliding sleeve 3 is arranged in the hollow of the chuck adapter 1 in a sliding mode, namely, a space is provided for installing the sliding sleeve 3 through the hollow of the chuck adapter 1, and meanwhile, guidance is provided for subsequent movement of the sliding sleeve 3. In addition, the sliding sleeve 3 is also arranged in a cylindrical shape, a first wedge surface 31 is arranged on one end of the inner wall of the sliding sleeve 3, which is positioned close to the gland 2, the collet chuck 6 is arranged in the hollow of the sliding sleeve 3, the end of the collet chuck 6, which is close to the gland 2, is a chuck 61, the outer wall of the chuck 61 is provided with a second wedge surface 611 corresponding to the first wedge surface 31, and one end of the chuck 61, which is close to the gland 2, is abutted against the gland 2, so that when the sliding sleeve 3 is forced to move towards one side close to the gland 2 along the axial direction, because the chuck 61 on the collet chuck 6 is limited by the gland 2, the sliding sleeve 3 and the chuck 61 relatively move, the first wedge surface 31 acts on the second wedge surface 611, thereby compressing the chuck 61 to deform, reducing the aperture of the chuck 61, and clamping a workpiece or a drill bit and other processing tools clamped on the chuck 61, otherwise loosening the workpiece or the drill bit, thereby realizing the clamping operation of the processing tools such as workpieces to be processed or drills. Simultaneously, just be located one side that sliding sleeve 3 deviates from gland 2 in chuck adapter 1's cavity and be provided with clamping ring 4, make the structure that is used for promoting on the main shaft can act on sliding sleeve 3 through clamping ring 4, the structure's of sliding sleeve 3 and the promotion that drives its removal is connected has been made things convenient for, structural design is more reasonable, in addition, be provided with go-between 5 in one side that sliding ring 4 deviates from sliding sleeve 3, the sealed in clearance between clamping ring 4 and chuck adapter 1 and clamping ring 4 and sliding sleeve 3 has been guaranteed, prevented that the pollutant from entering into the clearance and causing excessive wear and tear scheduling problem, safety protection nature is higher.

More specifically, one end of the chuck 61 close to the gland 2 is in a stepped arrangement, a step 612 is formed between the end with the large section and the end with the small section of the chuck 61, the arrangement of the step 612 provides a condition for the chuck 61 to abut against the gland 2, and the second wedge surface 611 matched with the first wedge surface 31 on the sliding sleeve 3 is arranged at the end with the large section of the chuck 61, and the end with the small section extends into the chuck extending hole 21 of the gland 2, and the step 612 abuts against the gland 2, so that the holes on the chuck 61 for clamping the workpiece to be machined or the machining tools such as a drill bit can be positioned in the chuck extending hole 21, thereby facilitating the clamping of the workpiece to be machined or the machining tools such as the drill bit, and the like, simultaneously ensuring the stable abutting of the gland 2 against the chuck 61, avoiding the problem that the chuck 61 moves in the installation and use processes, and facilitating the installation and positioning of the chuck 61 on the gland 2, the structural design is more reasonable.

More specifically, the opening on the gland 2 and located on the side where the cross section of the chuck extending hole 21 is large near the chuck 61 is provided with the first positioning inclined plane 211, and simultaneously, the step 612 formed between the large end of the cross section and the small end of the cross section of the chuck 61 is provided with the second positioning inclined plane 613 matched with the first positioning inclined plane 211, so that when the chuck 61 is pressed through the gland 2, the first positioning inclined plane 211 on the step 612 of the chuck 61 can be automatically matched with the second positioning inclined plane 613, the positioning is fast and accurate, not only is the convenience in installation between the chuck 61 and the gland 2 brought about, but also the connection precision between the chuck 61 and the gland 2 is higher, thereby the precision of product processing is ensured.

More specifically, chuck adapter 1 deviates from the one end that is provided with screw hole 11 and is flange structure 12 setting, and it has a plurality of mounting holes 121 to be distributed to be annular array on flange structure 12, has made things convenient for a plurality of mounting holes 121 on the flange structure 12 of its one end of chuck adapter 1 accessible to install on main shaft isotructure, has made things convenient for preceding pusher collet chuck integral mount in this embodiment promptly in main shaft isotructure, and structural design is more reasonable.

More specifically, the middle region of the chuck adapter 1 is radially provided with a hollow limiting hole 13 communicated with the chuck adapter 1, a limiting screw is screwed in the limiting hole 13, so that the limiting screw can extend into the hollow length of the chuck adapter 1 in the process of screwing the limiting screw, meanwhile, the outer wall of the sliding sleeve 3 is axially provided with a kidney-shaped hole 32 corresponding to the limiting hole 13, one end of the limiting screw extends into the kidney-shaped hole 32, at the moment, after one end of the limiting screw extends into the kidney-shaped hole 32, the sliding sleeve 3 can be limited from rotating in the axial direction, the sliding sleeve 3 can only slide in the axial direction, the sliding distance length is less than or equal to the length of the kidney-shaped hole 32, so that the clamping or releasing of the chuck 61 can be stably realized in the process of the sliding sleeve 3 sliding in the axial direction, and the structural design is more reasonable.

More specifically, the connecting hole 22 on the gland 2 and the limiting hole 13 on the chuck adapter 1 are both countersunk holes, so that after the gland 2 is installed on the chuck adapter 1 through a bolt and a limiting screw is installed in the limiting hole 13 on the chuck adapter 1, the end of the bolt cannot protrude out of the end plane of the gland 2, the end of the limiting screw cannot protrude out of the outer wall surface of the chuck adapter 1, and the safety and the attractiveness are both higher.

Fig. 5 is a structural diagram of the pressure ring according to a preferred embodiment of the present invention. As shown in fig. 1 and 5, the pressing ring 4 disposed on one side of the sliding sleeve 3 departing from the gland 2 is in a circular shape, and at this time, the pressing ring 4 is in a circular ring structure, and the pressing ring 4 further comprises a sleeve portion 41 and a pressing portion 42, one side of the pressing portion 42 abuts against one end of the sliding sleeve 3 departing from the gland 2, namely, the pressing ring 4 abuts against the sliding sleeve 3 through the pressing portion 42, and drives the sliding sleeve 3 to move. Meanwhile, one side of the compressing portion 42 departing from the sliding sleeve 3 is provided with a sleeve-connecting portion 41 arranged along the axial direction thereof, and the sleeve-connecting portion 41 is arranged in a cylindrical shape, so that the sleeve-connecting portion 41 can be conveniently sleeved on a matching structure on a main shaft and the like, and the installation and connection are more convenient. Simultaneously, the external diameter of cup joint portion 41 is less than the external diameter of clamping part 42, form a stair structure promptly in the junction of cup joint portion 41 and clamping part 42, make things convenient for supporting of follow-up go-between 5 to lean on, simultaneously, clamping part 42 supports and is provided with the protruding 421 of location in one side of sliding sleeve 3, offer the caulking groove 33 that is used for holding the protruding 421 of location on the terminal surface of the one end that sliding sleeve 3 and clamping ring 4 support by, make behind the protruding 421 embedding caulking groove 33 on the sliding sleeve 3 of location of clamping part 42, can promote the stability of being connected between clamping ring 4 and the sliding sleeve 3, the while has also made things convenient for the installation location of clamping ring 4 on sliding sleeve 3, structural design is more.

Fig. 6 is a structural diagram of a connection ring according to a preferred embodiment of the present invention, as shown in fig. 1 and fig. 6, the connection ring 5 disposed on a side of the compression ring 4 away from the sliding sleeve 3 is disposed annularly, and the connection ring 5 further includes a tightening portion 51 and a sealing portion 52, at this time, the tightening portion 51 is sleeved outside the sleeving portion 41 and located between the sleeving portion 41 and the chuck adapter 1, so as to fill a gap between the sleeving portion 41 and an inner wall of the chuck adapter 1, thereby ensuring the stability of the sleeving portion 41 of the compression ring 4, meanwhile, one side of the tightening portion 51 is abutted against the pressing portion 42, i.e. one side of the tightening portion 51 is pressed against a connecting portion between the sleeving portion 41 and the pressing portion 42 of the compression ring 4 to form a step 612 structure, thereby providing a tightening base for mounting the connection ring 5 on the compression ring 4, and the sealing portion 52 is disposed on a side of the tightening portion 51 abutted against the pressing portion 42, and at the same time, the sealing portion 52 extends into a gap between the sliding, guaranteed that sealing 52 can realize the sealed in the clearance between the outer wall of sliding sleeve 3 and the inner wall of chuck adapter 1, and, support tight portion 51 and be located on one side that is close to cup joint portion 41 and sealing 52 and all seted up seal groove 53 on one side that is close to chuck adapter 1, all be provided with the sealing washer in the seal groove 53, through the arrangement of the seal groove 53 who has the sealing washer promptly, realized the sealed between go-between 5 and clamping ring 4 and go-between 5 and chuck adapter 1, prevented that the pollutant from entering into the clearance between sliding sleeve 3 and chuck adapter 1 and cause wearing and tearing and the not high problem of clamping precision in the use, structural design is more reasonable.

The novel forward-push collet chuck provided by the embodiment comprises a chuck adapter 1, a gland 2, a sliding sleeve 3, a collet chuck 6, a pressing ring 4 and a connecting ring 5, wherein a plurality of threaded holes 11 are formed in the end face of one end of the chuck adapter 1 provided with the sliding sleeve 3, the collet chuck 6, the pressing ring 4 and the connecting ring 5 along the axial direction of the end face, the gland 2 abutting against the collet chuck 6 is arranged at one end of the chuck adapter 1 provided with the threaded holes 11, a plurality of connecting holes 22 corresponding to the threaded holes 11 in a one-to-one manner are formed in the gland 2, and the connecting holes 22 are connected with the threaded holes 11 through bolts, so that the stress directions of the chuck adapter 1 and the gland 2 are in respective axial directions, the wall thickness of the joint in the stress direction is increased, the risk of stress deformation is reduced, meanwhile, the stress of the gland 2 cannot directly act on the threads of, the collet chuck 6 is convenient to replace and maintain subsequently, and the use and popularization of products are more convenient.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. A novel forward push collet, comprising: chuck adapter, gland, sliding sleeve, collet chuck, clamping ring and go-between, the chuck adapter is the tube-shape setting, it is provided with a plurality of screw holes that set up along its axial to be annular array on the terminal surface of the one end of chuck adapter, the gland set up in the chuck adapter is provided with the one end of screw hole, the gland is circular setting, the center of gland has been seted up the chuck and has been stretched out the hole, it is provided with a plurality of connecting holes that run through along its axial to be annular array on the border of gland, and one the connecting hole corresponds one the screw hole, and the connecting hole that corresponds each other with the screw hole passes through bolted connection, simultaneously, the cavity internal slip of chuck adapter is equipped with the sliding sleeve, the sliding sleeve becomes the tube-shape setting equally, the inner wall of sliding sleeve just is located the one end that is close to the gland is provided with first, just the collet chuck is close to the one end of gland is the chuck, just the outer wall of chuck be provided with the second wedge face that first wedge face corresponds, and, the chuck is close to the one end of gland support lean on in on the gland, simultaneously, just be located in the cavity of collet adapter the sliding sleeve deviates from one side of gland is provided with the clamping ring, and in the clamping ring deviates from one side of sliding sleeve is provided with the go-between.

2. The novel advancing collet chuck according to claim 1, wherein the end of the collet near the gland is stepped, a step is formed between the end with the larger cross section and the end with the smaller cross section of the collet, the second wedge surface is arranged at the end with the larger cross section, the end with the smaller cross section extends into the collet extending hole of the gland, and the step is abutted against the gland.

3. The novel forward-push collet chuck as claimed in claim 2, wherein the opening of the pressing cover located at the side of the chuck extending hole near the large section of the chuck is provided with a first positioning slope, and the step formed between the large section end and the small section end of the chuck is provided with a second positioning slope cooperating with the first positioning slope.

4. The novel advancing collet chuck according to claim 1, wherein the collet adapter is arranged in a flange structure away from the end where the threaded hole is arranged, and a plurality of mounting holes are distributed on the flange structure in an annular array.

5. The novel forward-pushing collet chuck as claimed in claim 1, wherein the middle region of the collet adapter is provided with a limiting hole communicating with the hollow of the collet adapter along the radial direction of the middle region, a limiting screw is screwed in the limiting hole, meanwhile, the outer wall of the sliding sleeve is provided with a waist-shaped hole corresponding to the limiting hole along the axial direction of the sliding sleeve, and one end of the limiting screw extends into the waist-shaped hole.

6. The novel advancing collet as claimed in claim 5, wherein the connecting hole on the gland and the limiting hole on the collet adapter are both counter-bored holes.

7. The novel forward-push collet chuck as claimed in claim 1, wherein the compression ring is in a circular shape, the compression ring comprises a sleeve-joint part and a compression part, one side of the compression part is abutted against one end, deviating from the gland, of the sliding sleeve, the sleeve-joint part is arranged along the axial direction of the sliding sleeve on one side, deviating from the sliding sleeve, and the sleeve-joint part is in a cylindrical shape, meanwhile, the outer diameter of the sleeve-joint part is smaller than that of the compression part, the compression part is abutted against one side of the sliding sleeve and is provided with a positioning protrusion, and the end face, abutted against one end of the compression ring, of the sliding sleeve is provided with an embedding groove for accommodating the positioning protrusion.

8. The novel forward-pushing collet chuck as claimed in claim 7, wherein the connecting ring is annularly arranged, the connecting ring comprises a tightening portion and a sealing portion, the tightening portion is sleeved outside the sleeving portion and located between the sleeving portion and the collet adapter, one side of the tightening portion abuts against the pressing portion, the sealing portion is arranged on one side of the tightening portion abutting against the pressing portion, meanwhile, the sealing portion extends into a gap between the sliding sleeve and the collet adapter, sealing grooves are formed in the tightening portion and located on one side close to the sleeving portion and one side of the sealing portion and close to the collet adapter, and sealing rings are arranged in the sealing grooves.