CN220784284U

CN220784284U - Locking device convenient for replacing knife saw

Info

Publication number: CN220784284U
Application number: CN202322324149.2U
Authority: CN
Inventors: 黄柱文; 李拔文; 练文坤; 李裕顺
Original assignee: Guangzhou Maste Intelligent Equipment Co ltd
Current assignee: Guangzhou Maste Intelligent Equipment Co ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-04-16
Anticipated expiration: 2033-08-28

Abstract

The utility model discloses a locking device convenient for replacing a cutter saw, which comprises a motor, a main shaft, an ER collet, a multipurpose collet nut, a saw blade, a compression nut and a straight milling cutter, wherein the main shaft is fixedly arranged at the output end of the motor, the motor is used for driving the main shaft to rotate, one end of the ER collet stretches into a cavity of the main shaft and clings to the inner surface of the cavity of the main shaft, the other end of the ER collet stretches into the cavity of the multipurpose collet nut and is connected with the multipurpose collet nut, one end of the straight milling cutter passes through the compression nut and is inserted into the cavity of the ER collet nut, the ER collet is in filling connection with the straight milling cutter so as to clamp the straight milling cutter, the saw blade is sleeved at one end of the multipurpose collet nut far away from the main shaft, and the compression nut locks the saw blade on the multipurpose collet nut, and the compression nut is positioned at one side of the saw blade far away from the main shaft and clings to the surface of the saw blade. The utility model not only can conveniently replace the straight milling cutter and/or the saw blade, but also can well lock the straight milling cutter and the saw blade, thereby improving the operation reliability.

Description

Locking device convenient for replacing knife saw

Technical Field

The utility model relates to the technical field of knife saw locking devices, in particular to a locking device convenient for replacing a knife saw.

Background

The prior tool changing spindle device like furniture processing can realize tool changing and locking of tools, and in order to realize tool changing and locking, a collet chuck is directly arranged on a motor spindle, and is tightly pressed by a conventional collet chuck nut, so that the tools are locked. Meanwhile, when the cutter needs to be replaced, the original cutter is directly pulled out from the collet chuck and then a new cutter is inserted, so that the purpose of replacing the cutter is achieved. On the one hand, the existing device is often not ideal in locking effect, and in addition, only a cutter can be installed, but a circular saw blade cannot be installed, namely, a cutter saw cannot be installed at the same time. However, the requirements of lateral drilling, milling and other operations are required, and the saw blade is often difficult to be qualified without the saw blade, so that some application scenes are limited or the application is inconvenient in some scenes.

Disclosure of Invention

In view of the shortcomings of the prior art, the utility model aims to provide a locking device which is convenient for replacing a knife saw and can solve the problems described in the background art.

The technical scheme for realizing the purpose of the utility model is as follows: the utility model provides a locking device convenient to change knife saw, which comprises a motor, a spindle, the ER collet chuck, multi-purpose collet chuck nut, the saw bit, gland nut and straight milling cutter, main shaft fixed mounting is at the output of motor, the motor is used for driving the main shaft rotation, the one end of ER collet chuck stretches into in the cavity of main shaft and hugs closely in the internal surface of main shaft cavity, the other end of ER collet chuck stretches into in the cavity of multi-purpose collet chuck nut and is connected with multi-purpose collet chuck nut, the one end of straight milling cutter passes gland nut and inserts in the cavity of ER collet chuck, ER collet chuck is full with straight milling cutter and is connected, in order to clip straight milling cutter, the saw bit cover is established in the one end that multi-purpose collet chuck nut kept away from the main shaft, gland nut locks the saw bit on multi-purpose collet chuck nut, gland nut is located the saw bit and keeps away from the one side of main shaft and laminating in the surface of saw bit.

Further, the multipurpose collet nut comprises a protruding shaft, a locking piece and a nut seat which are sequentially connected together, wherein the protruding shaft, the locking piece and the nut seat are all provided with through holes, the axes of the through holes are coincident, the locking piece is used for fixedly connecting the protruding shaft and the nut seat together, the protruding shaft and the nut seat are respectively positioned at two sides of the axial direction of the locking piece, the protruding shaft is of a cylindrical structure, the locking piece is of a hexagonal nut structure, the nut seat is of a cylindrical structure, the cross section of the protruding shaft is smaller than that of the locking piece, an internal thread is arranged in the through hole of the nut seat, the internal thread of the nut seat is matched with an external thread on a main shaft to realize threaded connection, and the saw blade is sleeved on the protruding shaft and attached to the locking piece, and the compression nut is sleeved on the protruding shaft, so that the saw blade is locked on the protruding shaft.

Further, the main shaft comprises a shaft body, an upper cavity and a lower cavity are dug in the shaft body, the upper cavity is positioned at one end close to the motor, the lower cavity is positioned at one end far away from the motor, the upper cavity and the lower cavity are communicated together, the upper cavity is a cylindrical cavity, the lower cavity is in an annular structure with a narrow upper part and a wide lower part along the direction far away from the motor in the axial direction, so that the inner surface of the lower cavity is inclined upwards, the outer surface of one end of the shaft body far away from the motor is provided with external threads, the external threads encircle the shaft body,

the ER collet stretches into in the lower cavity to the terminal surface that ER collet stretches into the one end of axis body is located the junction of cavity and lower cavity, and the one end that ER collet stretches into the axis body is the inside surface laminating that the slope was upwards with lower cavity, and the terminal surface that the end that straight milling cutter stretched into one end of ER collet and ER collet stretched into one end of axis body flushes.

Further, a first tool withdrawal groove, a mounting groove, a clearance hole, a second tool withdrawal groove, a collet inner inclined surface and a collet outer inclined surface are arranged on the multipurpose collet nut, the mounting groove and the first tool withdrawal groove are arranged around the inner cavity of the protruding shaft and are positioned at one end of the protruding shaft close to the locking piece, the mounting groove and the first tool withdrawal groove are arranged at intervals, the mounting groove is closer to the locking piece, the diameter of the mounting groove is smaller than that of the first tool withdrawal groove, the mounting groove is positioned above the through hole of the locking piece, the diameter of the mounting groove is larger than that of the through hole of the locking piece, the through hole of the locking piece is of an upper-wide and lower-narrow structure, the inner surface of the through hole is inclined downwards,

the junction of locking piece and protruding axle digs and is equipped with the space of keeping away of inwards caving in, and the surface of protruding axle digs and is equipped with the second clearance groove, and the second clearance groove encircles on protruding axle.

Further, the first tool withdrawal groove is used for enabling external threads on the outer side of the end part, far away from one end of the motor, of the main shaft to be in threaded connection with the first tool withdrawal groove as close as possible, so that most of through holes of the nut seat on the multipurpose collet nut can be in threaded connection with the external threads of the main shaft, the depth of threaded connection is guaranteed, and the first tool withdrawal groove is a tool withdrawal groove milled by a plurality of circles of teeth at the lowest part of the internal threads of the nut seat, and the integrity of each circle of threads of the internal threads is guaranteed.

Further, the mounting groove is used to securely mount the ER collet on the multi-purpose collet nut, preventing dropping or misalignment during installation.

Further, the clearance gap is used for enabling the saw blade to be vertically sleeved on the multipurpose collet nut, the clearance gap is used as an over-travel groove, and the protruding shaft of the multipurpose collet nut is eliminated to influence the fit of the saw blade.

Further, the second relief groove is used for shortening the assembly distance of the saw blade, and the assembly distance only needs to keep the shaft shoulder height required by the matching of the saw blade, and is used for reducing the grinding area of the protruding shaft so as to be beneficial to actually generating and controlling the dimensional accuracy of the protruding shaft.

Further, one side of the nut seat is provided with a stop tooth hole penetrating through the nut seat, and the outer surface of one side of the nut seat, which is close to the locking piece, is provided with an outer inclined surface of the collet chuck and is inclined upwards.

Further, the multifunctional collet nut comprises a gasket and a set screw, the sizes of the gasket and the set screw are matched with the sizes of the retaining tooth holes, so that the gasket and the set screw can be embedded into the retaining tooth holes, the gasket is locked in the retaining tooth holes through the set screw, and the gasket is extruded to be pressed on the external threads of the main shaft, so that the multifunctional collet nut is locked on the main shaft, and the multifunctional collet nut is prevented from loosening.

The beneficial effects of the utility model are as follows: the utility model can enable the traditional spindle which can only be used for installing the straight milling cutter to be additionally provided with the saw blade, and the machine has the function of lateral slotting, so that the straight milling cutter and/or the saw blade can be replaced conveniently, the interchangeability is strong, and the spindle can be replaced and used as long as the spindle is standard. In addition, the utility model has simple structure, easy maintenance and low cost, and is convenient for large-scale popularization and use.

Drawings

FIG. 1 is an exploded view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model;

FIG. 3 is a schematic view of an assembled section of each component according to an assembled sequence of the present utility model, wherein small arrows in the drawing indicate the direction of the assembly of the components, and large arrows indicate the assembled sequence of the front and rear components;

FIG. 4 is a schematic view of the construction of the multi-purpose collet nut;

FIG. 5 is a schematic cross-sectional view of the spindle and motor coupled together;

FIG. 6 is a schematic cross-sectional view of a multi-purpose collet nut;

FIG. 7 is a schematic cross-sectional view of the present utility model;

in the figures, 1-straight milling cutter, 2-compression nut, 3-saw blade, 4-multipurpose collet nut, 41-protruding shaft, 42-locking piece, 43-nut seat, 431-retaining tooth hole, 401-first relief groove, 402-mounting groove, 403-clearance space, 404-second relief groove, 405-collet inner slope, 406-collet outer slope, 5-ER collet, 6-spindle, 61-upper cavity, 62-shaft, 63-lower cavity, 64-external thread, 7-motor, 8-spacer, 9-set screw.

Detailed Description

The utility model is further described with reference to the accompanying drawings and detailed description below:

as shown in fig. 1 to 7, a locking device for facilitating the replacement of a saw comprises a motor 7, a spindle 6, an ER collet 5, a multi-purpose collet nut 4, a saw blade 3, a compression nut 2 and a straight milling cutter 1, wherein the spindle 6 is fixedly mounted at the output end of the motor 7 (i.e. mounted on the rotor of the motor 7), and the motor 7 is used for driving the spindle 6 to rotate. One end of the ER collet 5 extends into the cavity of the main shaft 6 and is tightly attached to the inner surface of the cavity of the main shaft 6, and the other end of the ER collet 5 extends into the cavity of the multipurpose collet nut 4 and is connected with the multipurpose collet nut 4. One end of the straight milling cutter 1 passes through the multipurpose collet nut 4 and is inserted into the cavity of the ER collet 5, and the ER collet 5 is in full connection with the straight milling cutter 1 to clamp the straight milling cutter 1. The saw blade 3 is sleeved at one end of the multipurpose collet nut 4 far away from the main shaft 6, the compression nut 2 locks the saw blade 3 on the multipurpose collet nut 4, and the compression nut 2 is positioned at one side of the saw blade 3 far away from the main shaft 6 and is attached to the surface of the saw blade 3.

When the rotary saw is used, the motor 7 drives the main shaft 6 to rotate, so that the saw blade 3 and the straight milling cutter 1 can be driven to synchronously rotate together, and the rotary operation of the saw is realized. When the straight milling cutter 1 needs to be replaced, the ER collet 5 is released after the multipurpose collet nut 4 is loosened from the main shaft 6, so that the straight milling cutter 1 can be easily detached for replacement; when the saw blade 3 needs to be replaced, the saw blade 3 can be directly replaced by loosening the compression nut 2. The heel-changing process of the two cutters is independent and does not affect each other.

In an alternative embodiment, the multipurpose collet nut 4 includes a protruding shaft 41, a locking piece 42, and a nut seat 43 that are sequentially connected together, where the protruding shaft 41, the locking piece 42, and the nut seat 43 each have a through hole, and the axes of the through holes coincide (i.e., are on the same straight line). The locking piece 42 is used for fixedly connecting the protruding shaft 41 and the nut seat 43 together, and the protruding shaft 41 and the nut seat 43 are respectively located at two axial sides of the locking piece 42. The protruding shaft 41 has a cylindrical structure, the locking piece 42 has a hexagonal nut structure, the nut seat 43 has a cylindrical structure, and the cross section of the protruding shaft 41 is smaller than the cross section of the locking piece 42 is smaller than the nut seat 43. The through hole of the nut seat 43 is internally provided with internal threads, and the internal threads of the nut seat 43 are matched with external threads 64 on the spindle 6 to realize threaded connection, namely, one end of the spindle 6 far away from the motor 7 stretches into the through hole of the nut seat 43 and is in threaded connection with the nut seat 43. The saw blade 3 is sleeved on the protruding shaft 41 and is attached to the locking piece 42, and the compression nut 2 is sleeved on the protruding shaft 41, so that the saw blade 3 is locked on the protruding shaft 41.

In another alternative embodiment, the spindle 6 includes a shaft body 62, an upper cavity 61 and a lower cavity 63 are dug in the shaft body 62, the upper cavity 61 is located at one end close to the motor 7, the lower cavity 63 is located at one end far away from the motor 7, and the upper cavity 61 and the lower cavity 63 are communicated together. The upper chamber 61 is a cylindrical cavity having a longitudinal cross section in a rectangular structure in a lateral direction, as shown in fig. 3, and the lower chamber 63 is in an annular structure having a narrow upper portion and a wide lower portion in an axial direction in a direction away from the motor 7, so that an inner surface of the lower chamber 63 is inclined upward. The outer surface of the shaft body 62 at the end far away from the motor 7 is provided with an external thread 64, and the external thread 64 surrounds the shaft body 62.

The ER collet 5 extends into the lower cavity 63, and the end face of the end of the ER collet 5 extending into the shaft 62 is positioned at the joint of the upper cavity 61 and the lower cavity 63, and the end of the ER collet 5 extending into the shaft 62 is attached to the inner surface of the lower cavity 63 obliquely upwards. The end face of the end of the straight milling cutter 1 extending into the ER collet 5 is flush with the end face of the end of the ER collet 5 extending into the shaft 62, i.e. the end face of the end of the straight milling cutter 1 extending into the ER collet 5 is also located at the junction of the upper cavity 61 and the lower cavity 63.

In another alternative embodiment, the multipurpose collet nut 4 is provided with a first tool retracting groove 401, a mounting groove 402, a clearance hole 403, a second tool retracting groove 404, a collet inner inclined surface 405, a collet outer inclined surface 406 and a retaining tooth hole 431, wherein the mounting groove 402 and the first tool retracting groove 401 are arranged around the inner cavity of the protruding shaft 41 and are positioned at one end of the protruding shaft 41 near the locking piece 42, the mounting groove 402 and the first tool retracting groove 401 are arranged at intervals, the mounting groove 402 is closer to the locking piece 42, and the diameter of the mounting groove 402 is smaller than the diameter of the first tool retracting groove 401. The mounting groove 402 is located above the through hole of the locking piece 42, and the diameter of the mounting groove is larger than the maximum diameter of the through hole of the locking piece 42, the through hole of the locking piece 42 has a structure with a wide upper part and a narrow lower part, that is, the inner surface of the through hole of the locking piece 42 is inclined downward, that is, the inner surface of the through hole of the locking piece 42 is formed with an inner inclined surface 405 of the collet.

The junction of the locking piece 42 and the protruding shaft 41 is dug with an inward concave clearance space 403, the outer surface of the protruding shaft 41 is dug with a second tool withdrawal groove 404, and the second tool withdrawal groove 404 surrounds the protruding shaft 41.

The external thread 64 on the outer side of the end part of the spindle far away from one end of the motor 7 can be in threaded connection with the first tool retracting groove 401 as close as possible, so that the multipurpose collet nut 4 can be locked to the deepest part, namely, most of the through holes of the nut seat 43 on the multipurpose collet nut 4 can be in threaded connection with the external thread 64 of the spindle, and the depth of threaded connection is ensured. Wherein the first relief groove 401 is a relief groove milled in the lowest turns of the internal thread of the nut seat 43 to ensure the integrity of each turn of the internal thread.

The ER collet 5 can be securely mounted to the multi-purpose collet nut 4 by the mounting groove 402, preventing dropping or misalignment during installation. During the process of mounting the ER collet 5 on the multipurpose collet nut 4, the end of the ER collet 5 is mounted in the mounting groove 402, the diameter of the mounting groove 402 is smaller than that of the end of the ER collet 5, and the ER collet 5 itself has a certain shrinkage, so that the ER collet 5 can be easily mounted in the mounting groove 402, thereby preventing falling or deviation during the mounting process.

The saw blade 3 can be vertically sleeved on the multipurpose collet nut 4 through the clearance gap 403, and the clearance gap 403 is used as an over-travel groove, so that the influence of the protruding shaft 41 of the multipurpose collet nut 4 on the fitting of the saw blade 3 can be eliminated.

The second tool retracting groove 404 can shorten the assembly distance of the saw blade 3, and only the shaft shoulder height required by the matching of the saw blade 3 is reserved in the assembly distance, so that the grinding area of the protruding shaft 41 can be reduced, and the dimension precision of the protruding shaft 41 can be controlled in an actual manner.

The nut seat 43 is provided with a retaining tooth hole 431 penetrating the nut seat 43, and the outer surface of the nut seat 43 near the locking piece 42 is provided with a collet outer inclined surface 406 which is inclined upwards.

In an alternative embodiment, the device further comprises a spacer 8 and a set screw 9, wherein the dimensions of the spacer 8 and the set screw 9 are adapted to the dimensions of the anti-backup hole 431, so that the spacer 8 and the set screw 9 can be embedded in the anti-backup hole 431. The washer 8 is locked in the retaining tooth hole 431 by the set screw 9, and the washer 8 is pressed to press against the external thread 64 of the spindle, thereby locking the multipurpose collet nut 4 to the spindle and preventing the multipurpose collet nut 4 from loosening.

The utility model not only can conveniently replace the straight milling cutter 1 and/or the saw blade 3, but also can well lock the straight milling cutter 1 and the saw blade 3, so that the cutter saw is still stably arranged on the main shaft 6 in the rotating process, and the operation reliability is improved. In addition, the utility model has simple structure, easy maintenance and low cost, and is convenient for large-scale popularization and use.

The embodiment disclosed in the present specification is merely an illustration of one-sided features of the present utility model, and the protection scope of the present utility model is not limited to this embodiment, and any other functionally equivalent embodiment falls within the protection scope of the present utility model. Various other corresponding changes and modifications will occur to those skilled in the art from the foregoing description and the accompanying drawings, and all such changes and modifications are intended to be included within the scope of the present utility model as defined in the appended claims.

Claims

1. A locking device convenient for replacing a knife saw is characterized by comprising a motor, a main shaft, an ER collet, a multipurpose collet nut, a saw blade, a compression nut and a straight milling cutter, wherein the main shaft is fixedly arranged at the output end of the motor, the motor is used for driving the main shaft to rotate, one end of the ER collet stretches into a cavity of the main shaft and clings to the inner surface of the cavity of the main shaft, the other end of the ER collet stretches into the cavity of the multipurpose collet nut and is connected with the multipurpose collet nut, one end of the straight milling cutter penetrates through the compression nut and is inserted into the cavity of the ER collet nut, the ER collet is in filling connection with the straight milling cutter so as to clamp the straight milling cutter, the saw blade is sleeved at one end of the multipurpose collet nut far away from the main shaft, and the compression nut locks the saw blade on the multipurpose collet nut, and the compression nut is positioned at one side of the saw blade far away from the main shaft and clings to the surface of the saw blade.

2. The locking device for facilitating the replacement of a tool saw according to claim 1, wherein the multipurpose collet nut comprises a protruding shaft, a locking piece and a nut seat which are sequentially connected together, the protruding shaft, the locking piece and the nut seat are all provided with through holes, the axes of the through holes coincide, the locking piece is used for fixedly connecting the protruding shaft and the nut seat together, the protruding shaft and the nut seat are respectively positioned at two axial sides of the locking piece, the protruding shaft is of a cylindrical structure, the locking piece is of a hexagonal nut structure, the nut seat is of a cylindrical structure, the cross section of the protruding shaft is smaller than the cross section of the locking piece, the nut seat is internally provided with internal threads, the internal threads of the nut seat are matched with external threads on a main shaft to realize threaded connection, and the saw blade is sleeved on the protruding shaft and is attached to the locking piece, and the compression nut is sleeved on the protruding shaft, so that the saw blade is locked on the protruding shaft.

3. The locking device for facilitating the replacement of a knife saw according to claim 2, wherein the main shaft comprises a shaft body, an upper cavity and a lower cavity are dug in the shaft body, the upper cavity is positioned at one end close to the motor, the lower cavity is positioned at one end far away from the motor, the upper cavity and the lower cavity are communicated together, the upper cavity is a cylindrical cavity, the lower cavity is in an annular structure with a narrow upper part and a wide lower part along the direction far away from the motor in the axial direction, so that the inner surface of the lower cavity is inclined upwards, an external thread is arranged on the outer surface of one end of the shaft body far away from the motor, the external thread surrounds the shaft body,

4. The locking device for facilitating the replacement of a saw according to claim 3, wherein the multipurpose collet nut is provided with a first withdrawal groove, a mounting groove, a clearance space, a second withdrawal groove, an inner inclined surface of the collet, and an outer inclined surface of the collet, the mounting groove and the first withdrawal groove are circumferentially arranged in an inner cavity of the protruding shaft and positioned at one end of the protruding shaft near the locking piece, the mounting groove and the first withdrawal groove are arranged at intervals, the mounting groove is closer to the locking piece, the diameter of the mounting groove is smaller than the diameter of the first withdrawal groove, the mounting groove is positioned above a through hole of the locking piece, the diameter of the mounting groove is larger than the maximum diameter of the through hole of the locking piece, the through hole of the locking piece is in an upper wide and lower narrow structure, so that the inner surface of the through hole is inclined downward,

5. The locking device for facilitating replacement of a saw according to claim 4, wherein the first relief groove is used for enabling the external thread on the outer side of the end part of the spindle far away from one end of the motor to be screwed on the first relief groove as close as possible, so that most of the through hole of the nut seat on the multipurpose collet nut can be screwed with the external thread of the spindle, the depth of the threaded connection is ensured, and the first relief groove is a relief groove milled on the lowest circle of teeth of the internal thread of the nut seat, so that the integrity of each circle of threads of the internal thread is ensured.

6. The lock assembly for facilitating replacement of a saw of claim 5, wherein the mounting groove is adapted to securely mount the ER collet to the multi-purpose collet nut to prevent falling or misalignment during installation.

7. The locking device for facilitating replacement of a saw of claim 6, wherein the clearance gap is adapted to enable the saw blade to be vertically nested on the multipurpose collet nut, the clearance gap being an over-travel slot to eliminate a protruding shaft of the multipurpose collet nut from affecting the fit of the saw blade.

8. The locking device for facilitating replacement of a saw of claim 7, wherein the second relief groove is adapted to shorten an assembly distance of the saw blade by only reserving a shoulder height required for the mating of the saw blade and for reducing an abrasive area of the protruding shaft to facilitate a practical generation of dimensional accuracy of the control protruding shaft.

9. The locking device for facilitating replacement of a saw of claim 8, wherein the nut seat has a retaining tooth hole extending therethrough, and the outer surface of the nut seat adjacent the locking tab has an outer inclined surface of the collet and is inclined upward.

10. The locking device for facilitating replacement of a saw of claim 9, further comprising a washer and a set screw sized to fit the size of the retaining tooth aperture such that the washer and set screw may be inserted into the retaining tooth aperture, the washer is locked into the retaining tooth aperture by the set screw and the washer is compressed against the external threads of the spindle to lock the multipurpose collet nut to the spindle, preventing loosening of the multipurpose collet nut.