CN111421365B

CN111421365B - System and method for quick replacement of hole opener saw blade and hole opener assembly

Info

Publication number: CN111421365B
Application number: CN202010392905.3A
Authority: CN
Inventors: 岑明其
Original assignee: CIXI GUANGHUA INDUSTRIAL CO LTD
Current assignee: CIXI GUANGHUA INDUSTRIAL CO LTD
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2025-03-04
Anticipated expiration: 2040-05-11
Also published as: CN111421365A

Abstract

The present invention belongs to the technical field of electric tools, and specifically relates to a quick-change system for a hole opener saw blade, a hole opener assembly having the quick-change system, and a quick-change method for saw blades based thereon. The quick-change system includes a first connecting mechanism and a connecting release mechanism that can be detachably matched, the connecting release mechanism includes a second connecting mechanism, and the first and second connecting members are respectively provided with a first and a second force-bearing end, and the setting directions of the two correspond to the driving rotation direction, so as to transmit torque after matching to drive the saw blade. Thereby, the saw blade can be quickly installed and released, and with the further provided detachable panel, rapid locking and stepless replacement of the saw blade can be achieved.

Description

System and method for quickly replacing saw blade of hole digger and hole digger assembly

Technical Field

The invention belongs to the technical field of electric tools, and particularly relates to a quick replacement system for a saw blade of a hole digger, a hole digger assembly with the quick replacement system and a saw blade quick replacement method based on the quick replacement system.

Background

The hole puncher is a sawing circular saw for processing circular holes, can carry out hole punching operation on materials such as metal, wood, plastic, glass, stone and the like, and has simple and flexible operation, convenient carrying and extremely wide application.

The existing hole digger mainly comprises a rotating handle and a hole digger body, wherein the rotating handle is generally connected with the hole digger body through threads, if the hole digger body needs to be replaced, the original hole digger is screwed off firstly, then a new hole digger body is installed, but due to the fact that the hole digger body is subjected to drilling operation, sliding teeth or biting phenomenon possibly occurs between threads, the hole digger is difficult to detach, and waste in the hole digger body is difficult to clean out rapidly.

Therefore, the application is designed for solving the problems.

Disclosure of Invention

The invention aims to provide a rapid saw blade replacing system of a hole digger, which is easy to install and disassemble and easy to take out waste, a hole digger assembly with the system and a rapid saw blade replacing method based on the system.

In order to achieve the above purpose, the invention adopts the following scheme:

a quick replacement system for a saw blade of a hole digger comprises a first connecting mechanism and a connecting and releasing mechanism, wherein the first connecting mechanism is arranged at the rear end of the saw blade, and the rear end of the connecting and releasing mechanism is used for being connected with a driving device.

The first connecting mechanism is detachably matched with the connection release mechanism, a central drilling hole is formed in the center of the connection release mechanism, the connection release mechanism comprises a second connecting mechanism matched with the first connecting mechanism, a first stressed end is arranged on the first connecting mechanism, the second connecting mechanism comprises a second stressed end, the arrangement direction of the first stressed end and the second stressed end corresponds to the driving rotation direction, and therefore after the first connecting mechanism is matched with the connection release mechanism, the first stressed end and the second stressed end are matched with each other to drive the saw blade to rotate.

Preferably, the second connecting means has a plurality of connecting means which are not arranged in line, the first connecting means are fitted one by one with the second connecting means, and the second stress end is arranged in the radial direction so that after the saw blade is fitted with the connection release means, it is arranged concentrically with the central borehole.

Preferably, the second connection means has at least three and is uniformly arranged in the circumferential direction.

Preferably, the second stress end is disposed on a front end surface of the connection release mechanism and is disposed along a radial direction, and the second stress end includes two disposition modes of being directly disposed on the front end surface and being disposed inside the connection release mechanism after extending from the front end surface to a proper distance inside the connection release mechanism.

Preferably, the first connecting mechanism further includes a locking block formed to extend rearward along the second force receiving end, and the second connecting mechanism has a locking groove, respectively, into which the locking block is fitted to connect the saw blade with the release mechanism. The locking block and the locking groove can be locked by rotating after being matched, so that the saw blade can be limited in the axial direction, and the saw blade and the quick release mechanism form a whole and are not easy to fall off.

Preferably, the connection release mechanism comprises a first panel and a second panel, wherein the second panel can be movably arranged in a close or distant mode relative to the first panel so as to achieve tightening or loosening between the two panels, the first panel and the second panel are matched to form a second connection mechanism, and the second stress end is arranged on the first panel or the second panel.

Further, the device also comprises a transmission connecting piece, wherein the tail end of the transmission connecting piece is provided with a transmission unit to be connected with the driving device, and the front end is used for the first panel and the second panel to be matched with the first panel and the second panel.

Preferably, the first panel and the second panel may be movably arranged in various manners, for example, one panel is movably matched with the transmission connecting member through a spring structure, a thread structure, a card structure and the like, so as to realize the movable arrangement between the two panels.

When the spring structure is movably matched, the transmission connecting piece can be further provided with a spring seat, two ends of the spring are respectively matched with the spring seat and the second panel or the first panel, for example, two ends of the spring are respectively abutted against the spring seat and the second panel or the first panel, or two ends of the spring are further fixed. The spring can make the latch segment fit into the locking groove more convenient on the one hand, on the other hand also can ensure that two panels can provide certain effort to the latch segment under the locking state in order to ensure the closure effect.

When the two panels are movably matched through the threaded structure, external threads can be arranged on the transmission connecting piece, and internal threads are correspondingly arranged on the first panel or the second panel, so that the relative approaching or separating between the two panels can be realized through the rotation of the first panel and the second panel on the transmission connecting piece, and the movable setting of the two panels can be realized.

When carrying out movable fit through the card structure, can set up a plurality of draw-in grooves on the transmission connecting piece to additionally set up the card that can block in this draw-in groove, thereby can realize the regulation to first panel or second panel setting position through the card block on the draw-in groove of different positions, thereby realize the relative near or keep away from between two panels in order to realize its activity setting.

Preferably, the second stress end is arranged on the first panel, and the first panel and the transmission connecting piece are respectively provided with a transmission connecting structure so as to realize transmission connection. Such a way is easy to manufacture and practical.

Preferably, a rotational positioning mechanism is provided between the first panel and the second panel such that the two are only axially moved closer or farther. Of course, when the movable arrangement between the two panels is a screw structure, the rotational positioning mechanism may be adversely affected, and the rotational positioning mechanism should not be provided at this time.

A rapid saw blade release hole opener assembly comprises a saw blade, a connection release mechanism and a transmission connecting piece, wherein the tail end of the transmission connecting piece is used for being connected to a driving device, and the front end of the transmission connecting piece can be connected to the rear end of the saw blade through the connection release mechanism.

The first connecting mechanism is matched with the connecting and releasing mechanism in a detachable mode, a central drilling hole can be formed in the center of the connecting and releasing mechanism, the connecting and releasing mechanism comprises a second connecting mechanism matched with the first connecting mechanism, the first connecting mechanism is provided with a first stressed end, the second connecting mechanism comprises a second stressed end, the arrangement directions of the first stressed end and the second stressed end correspond to the driving rotation direction so as to transmit torque when rotating, and the first connecting mechanism and the connecting and releasing mechanism can be matched to drive the saw blade to rotate.

Preferably, the second connecting means has a plurality of connecting means and they are arranged in a non-collinear manner, the first connecting means and the second connecting means are arranged in a one-to-one correspondence, and the second stress end is arranged in a radial direction such that after the saw blade is arranged in cooperation with the connection release means, it is arranged concentrically with the central borehole.

Preferably, the connection release mechanism comprises a first panel and a second panel, wherein the second panel can be movably arranged in a close or far way relative to the first panel so as to realize the tightening or loosening between the two panels, the first panel and the second panel are matched to form a second connection mechanism, a second stress end is arranged on the first panel or the second panel, and the first panel or the second panel provided with the second stress end is in transmission connection with the transmission connecting piece.

The transmission connecting piece further comprises a spring seat, two ends of the spring are respectively matched with the spring seat and the second panel or the first panel, for example, the spring seat and the second panel are propped against or fixed, the first connecting mechanism further comprises a locking block which is formed by extending backwards along the second stress end, and the second connecting mechanism is correspondingly provided with a locking groove, and the locking block is matched into the locking groove to connect the saw blade with the release mechanism.

A quick release method of a hole opener saw blade, comprising the steps of:

firstly, configuring the hole digger to comprise the hole digger saw blade quick change system of any one of the above, preferably a quick change system with a locking block and a locking slot;

Secondly, rotating the saw blade to separate the locking piece from the locking groove;

Finally, the saw blade is moved axially to disengage the first attachment mechanism at its distal end from the second attachment mechanism of the attachment release mechanism to effect quick disengagement of the saw blade from the attachment release mechanism.

The quick replacement system for the saw blade of the hole digger can realize quick installation and release of the saw blade through the first connecting mechanism and the second connecting mechanism, so that the size and the specification of the saw blade can be quickly replaced when the hole digger is used.

Preferably, the quick replacement system further comprises a locking block and two axially displaceable panels, wherein the locking block is matched between the two panels, at least one of the panels is displaced to enlarge the gap during release, and then the saw blade is rotated to separate the locking block therefrom, so that the saw blade is optimally and axially taken out, namely, the release operation only comprises three steps of unlocking, rotating and displacing, and the operation is very convenient.

In addition, the second connecting mechanism of the quick-change system can be arranged on the quick-release mechanism in a way of extending from the central drilling hole to the periphery along the radial direction, the specific shape of the second connecting mechanism can be a straight line, a curve or a combination of the two, and the connecting mechanism can also be used for adapting to a saw blade with any diameter within the size range without limiting the specific diameter of the saw blade, so that the size range of the saw blade which can be adapted by the quick-change system can be greatly expanded, even under different standards such as an English standard, a American standard and the like, the adaptation can be carried out, and the compatibility is greatly improved, and the quick-change system is an additional advantage of the quick-change system.

The hole digger assembly and the saw blade quick change method of the present invention are realized based on the quick change system described above, and thus have the advantages described above.

Drawings

FIG. 1 is a schematic perspective view of a quick change system for a hole opener saw blade according to a first embodiment of the present invention;

FIG. 2 is an exploded view of the embodiment of FIG. 1;

FIG. 3 is a schematic illustration of the engagement of the connection release mechanism with the core drill of the embodiment of FIG. 1;

FIG. 4 is an exploded schematic view of the connection release mechanism of the embodiment of FIG. 1;

FIG. 5 is a schematic cross-sectional view of the quick change system of the embodiment of FIG. 1;

FIG. 6a is a schematic view of the configuration of the saw blade of the embodiment of FIG. 1, and FIG. 6b is an enlarged partial schematic view of FIG. 6 a;

FIG. 7 is a schematic perspective view of a quick change system for a hole cutter blade according to a second embodiment of the present invention;

FIG. 8 is an exploded view of the embodiment of FIG. 7;

FIG. 9 is a schematic illustration of the engagement of the connection release mechanism with the core drill of the embodiment of FIG. 7;

FIG. 10 is an exploded schematic view of the connection release mechanism of the embodiment of FIG. 7;

FIG. 11 is a schematic cross-sectional structural view of the quick change system of the embodiment of FIG. 7;

FIG. 12a is a schematic view of the configuration of the saw blade of the embodiment of FIG. 7, and FIG. 12b is an enlarged partial schematic view of FIG. 12 a;

FIG. 13 is a schematic view showing the engagement of a locking groove provided in an integrally formed coupling release mechanism with a locking block according to another embodiment of the present invention;

FIG. 14 is a schematic perspective view of a quick change system for a hole opener saw blade according to a third embodiment of the present invention;

Fig. 15 is an exploded view of the connection release mechanism of the embodiment of fig. 14.

Detailed Description

The invention will be described in detail below with respect to certain specific embodiments thereof in order to better understand the invention and thereby to more clearly define the scope of the invention as claimed. It should be noted that the following description is only some embodiments of the inventive concept and is only a part of examples of the present invention, wherein the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the implementation scope of the present invention. Conventional selections and substitutions made by those skilled in the art under the guidance of the inventive concept should be considered as being within the scope of the claimed invention.

A quick change system for a hole opener saw blade includes a first attachment mechanism 240 and an attachment release mechanism 200, the first attachment mechanism 240 being disposed at the rear end 122 of the saw blade 12, the rear end of the attachment release mechanism 200 being adapted to be connected to a drive device such that the saw blade 12 is attached to the drive device (e.g., drive motor, electric drill) via the attachment release mechanism 200.

The first attachment mechanism 240 is removably mated with the attachment release mechanism 200 so that the saw blade 12 can be separated from the attachment release mechanism 200 when desired for purposes of replacement of the saw blade 12 or cleaning of waste material within.

The center of the connection release mechanism 200 is provided with a center drilling hole 203 for the center drill 11 to be matched with, the connection release mechanism 200 comprises a second connection mechanism 230 matched with a first connection mechanism 240, and the first connection mechanism 240 is detachably matched with the second connection mechanism 230 so as to realize the connection mode of the detachable matching between the saw blade 12 and the connection release mechanism 200.

The first connection mechanism 240 is provided with a first stress end 201, the second connection mechanism includes a second stress end 202, and the arrangement direction of the first stress end 201 and the second stress end 202 corresponds to the driving rotation direction, that is, the first stress end 201 and the second stress end 202 are matched with the rotation rear side of the first connection mechanism 240 (that is, the rear side of the rotation direction in the hole opening operation to play a supporting role).

The connection release mechanism 200 may be generally flat and disc-shaped, and has a front end surface 205 and a rear end surface 206, and the first stress end 201 is disposed on the front end surface 205, including directly disposed on the front end surface 205 and disposed inside the connection release mechanism 200 after extending from the front end surface 205 to a suitable distance inside the connection release mechanism 200. The outer profile of the connection release mechanism 200 is preferably rounded to avoid safety hazards when it rotates.

When the connection release mechanism 200 is driven to rotate by the driving device, torque is transmitted to the rear end 122 of the saw blade through the first stress end 201 and the second stress end 202, so that after the first connection mechanism 240 is matched with the connection release mechanism 200, the first stress end 201 and the second stress end 202 are matched to drive the saw blade 12 to correspondingly rotate, and the tooth 121 at the front end of the saw blade 12 rotates to perform the hole forming operation.

The second connection means 230 has a plurality and the second connection means 230 are arranged in a non-collinear manner, which may result in the saw blade not being fixed and being allowed to be displaced in the direction of the arrangement of the second connection means 230, which may affect the basic function of the hole digger, which is not preferable. Further, the first connection mechanism 240 and the second connection mechanism 230 are preferably fitted in a one-to-one correspondence.

Preferably, the second force-receiving end 202 is configured to be radially disposed, i.e., extend outwardly from about the central region of the connection release mechanism 200 to form the second force-receiving end 202, either linearly (i.e., radially) or non-linearly (i.e., radially) with some degree of bending along with the radial extension to form a second force-receiving end 202 resembling a rotating spiral. Such a second stress end 202 may be configured such that, after the blade has been mated to the attachment release mechanism 200, it is disposed concentrically with the central bore 203, i.e., by such a design to ensure that the blade 12 is always concentric with the central drill 11 disposed in the central bore 203, ensuring that the hole opening results are as desired.

In the most preferred case, the second stress ends 202 are at least three in number and are uniformly circumferentially disposed, obviously at 120 ° to each other when three are present, 90 ° to each other when four are present, and so on. This allows for more aesthetic aspects on the one hand and for the first attachment mechanism 240 to be equally positioned at the blade rear end 122 to facilitate the loading and unloading operations of the blade 12 on the other hand.

For example, as shown in fig. 2, the first and second connection mechanisms 240 and 230 each have three and are disposed at an angular interval of 120 °, and in addition, the number of the first and second connection mechanisms 240 and 230 may be four, five or more and are preferably disposed uniformly in the circumferential direction to ensure concentricity of the center drill 11 and the saw blade 12. Of course, in the above-described arrangements, a uniform arrangement is not necessary, and a non-uniform arrangement does not adversely affect concentricity, but may have an effect on the angle of installation of the saw blade 12, possibly requiring directional installation.

To ensure a secure fit of the saw blade 12 after installation, and easy to use, the first attachment mechanism 240 further includes a locking block 241 extending rearward along the second force-bearing end 202 (opposite to the direction of rotation during the hole forming operation), the rearward extending locking block 241 cooperating with the first force-bearing end 201 and the rear end 122 of the saw blade to form a recess 2411, and the second attachment mechanism 230 correspondingly includes a locking groove 2301, the thickness difference between the locking groove 2301 and the front end surface 205 being matched to the recess 2411. When the connection release mechanism 200 is composed of the first panel 210 and the second panel 220, the axial width of the recess 2411 is the same as or slightly greater than the thickness of the first panel 210, and the two panels can be connected in a snap fit.

After the saw blade 12 is engaged with the connection release mechanism 200, the first connection mechanism 240 is at least partially engaged with the second connection mechanism 230, and the saw blade 12 is rotated in a reverse direction to engage the locking block 241 into the locking groove 2301, so that the saw blade 12 and the connection release mechanism 200 are firmly connected in the axial direction due to the engagement of the locking block 241 with the locking groove 2301, and are not easy to fall off. The positive direction refers to the rotation direction during the perforating operation, and the axial direction refers to the setting direction of the center drill.

In view of the above-mentioned need for a rotation operation when the locking block 241 is locked, the locking grooves 2301 of the second connection mechanisms 230 that are non-linear and uniformly arranged need to be additionally configured such that the arrangement directions of the respective second connection mechanisms 230 are the same, which may be achieved by rotating the locking groove 2301 of one of the second connection mechanisms 230 by a corresponding angle along the center, which may otherwise cause abnormal engagement of the saw blade 12. Of course, for the first connection mechanism 240 without the locking block 241, it is an interference fit of the first and second stress ends 201 and 202 after axial engagement, and rotation is not involved and the above is not considered.

To facilitate the control of the axial locking, the connection release mechanism 200 may be composed of a first panel 210 and a second panel 220, where the second panel 220 is movably disposed relative to the first panel 210, i.e. the first panel 210 and the second panel 220 may be relatively close to or far away from each other in the axial direction, and the second stress end 202 is disposed on the first panel 210 or the second panel 220, where the first panel 210 and the second panel 220 cooperate to form a second connection mechanism 230. By default, the first panel 210 may be positioned adjacent to the second panel 220 with the lock 241 being received in the space therebetween and the lock groove 2301 being defined by the space therebetween. When the saw blade 12 is to be removed, the operation is such that the first panel 210 is separated from the second panel 220 and the saw blade 12 is rotated in the opposite direction to disengage the lock 241 from the lock groove 2301, axially displace the saw blade 12 and disengage the saw blade 12 from the attachment release mechanism 200.

Although in the above case, the second force-bearing end 202 is disposed on the first panel 210, it is also possible to dispose the first force-bearing end 201 at the front end of the extended locking block 241 and correspondingly change the second force-bearing end 202 to cooperate with the first force-bearing end, and in this case, the second force-bearing end 202 may be disposed on the first panel 210 or the second panel 220 or be formed by the wall of the corresponding locking groove 2301 in the integrally formed connection release mechanism 200 (as shown in fig. 13).

For the purpose of enabling the second panel 220 and the first panel 210 to be movably disposed along the axial direction, the system may further include a transmission connecting member 13, where a transmission unit 131 (for example, a hexagonal prism structure design or other existing driving connection structure, or a non-circular shape) is disposed at the end of the transmission connecting member 13 and connected to the driving device, and the front end of the transmission connecting member is used for the first panel 210 and the second panel 220 to be matched with each other, and at least one of the first panel 210 and the second panel 220 is movably matched with the front end of the transmission connecting member 13 along the axial direction.

For example, as shown in fig. 2, the transmission connecting piece 13 is provided with a movable portion 136, the front end of the movable portion 136 is provided with a transmission portion 134, and the front end of the transmission portion 134 is provided with a threaded portion 133, that is, the front end of the transmission connecting piece 13 is provided with the threaded portion 133, the transmission portion 134 and the movable portion 136 in sequence, and the diameter of the movable portion 136 is larger than that of the transmission portion 134, so that after the first panel 210 is arranged on the transmission portion 134, two ends of the first panel 210 are respectively limited by the nut 137 and the movable portion 136, thereby realizing the design that the first panel 210 is fixedly matched on the transmission connecting piece 13 in the axial direction, and the second panel 220 is matched on the movable portion 136 in the axial direction, thereby realizing the purpose that the second panel 220 and the first panel 210 can be movably arranged in the axial direction. Of course, this is only one design, and it is possible to actually interchange the two structures or set them to be axially displaceable in cooperation.

As shown in fig. 2 and 5, the central drilling hole 203 is disposed in the transmission connecting piece 13, the transmission connecting piece 13 is further provided with a fixing screw hole 132 penetrating through the central drilling hole 203, and after the central drilling hole 11 is disposed in the central drilling hole 203, the fixing screw 111 is screwed into the fixing screw hole 132 and is pushed into the transmission end of the tail end of the central drilling hole 11, so that the central drilling hole 11 is in transmission connection with the transmission connecting piece 13.

To further achieve the automatic locking function on the shaft, the driving connection member 13 further includes a spring seat 135, and both ends of the spring 2201 are respectively engaged with the driving connection member 13 and the connection release mechanism 200, so that the second panel 220 can be axially moved closer to or away from the first panel 210, and the spring 2201 is preferably initially configured to be in a compressed state, so that the two panels are clamped relatively by default, and the spring 2201 is forced to be further compressed when the saw blade is required to be disassembled.

For example, as shown in fig. 2 and 5, the spring seat 135 and the spring 2201 are disposed on the transmission connecting member 13, two ends of the spring 2201 are respectively matched against the spring seat 135 and the spring sleeve 2202, the spring sleeve 2202 is connected with the second panel 220, and the spring 2201 is compressed appropriately in the initial condition, so that the second panel 220 acts on the locking block 241 initially, and when the saw blade 12 needs to be detached, the spring sleeve 2202 is operated to compress the spring 2201 further, and the second panel 220 is away from the first panel 210, so as to facilitate the detachment of the saw blade 12. In addition to the above-mentioned spring structure, rotating any panel, or making a certain panel be able to be displaced and fixed on the transmission connecting piece 13, is also a feasible way to realize the movable arrangement of two panels.

As shown in fig. 2, in order to achieve the transmission effect for the saw blade 12, the second stress end 202 may be disposed on the first panel 210, and meanwhile, the first panel 210 and the transmission connecting member 13 are respectively provided with a transmission connection structure, such as a double D-shaped structure or a polygonal prism-shaped structure, so as to achieve the rotation transmission of the two. This is one of the driving means, and in practice it may also be provided on the second panel 220 and be in driving connection with the driving connection 13.

Meanwhile, considering that the relative rotation between the first panel 210 and the second panel 220 may affect the convenience of the connection release mechanism 200 when the connection release mechanism is detached, a rotation positioning mechanism may be disposed between the first panel 210 and the second panel 220, so that the two panels can only be axially moved closer to or away from each other, and cannot be relatively rotated. The above-mentioned rotation positioning mechanism may be various, for example, a guiding structure is correspondingly disposed on the movable portion 136, and the central hole of the second panel 220 has a corresponding shape, including but not limited to, a polygonal column is used as the movable portion 136, a guiding plane is disposed on the cylindrical movable portion 136, or, as shown in fig. 4, grooves 204 disposed along the axial direction are disposed on the first panel 210 and the second panel 220, respectively, as rotation positioning members, so that rotation between the two panels is inhibited.

Fig. 1-5, 6a and 6b show a first embodiment of the quick release system of the present invention, which has the main structure described above, and is characterized in that the first panel 210 is formed with a slot 231 formed in a long shape by spacing two driving ribs 232, and one side of the slot 231 is used as the second stress end 202, and the first connection mechanism 240 can be partially inserted into the slot 231 to be matched with the slot, and meanwhile, the first panel 210 and the driving connection member 13 are matched to transmit torque through a double D-shaped driving connection mechanism, and the second connection mechanism 230 is formed by the slot 231 with a gap between the first panel 210 and the second panel 220.

The first panel 210 further includes chip holes 211 for discharging chips when the end of the saw blade 12 is opened, and the second panel 220 includes an end surface 221 and a side surface 222, and the first panel 210 is fitted inside the side surface 220 of the second panel 220, so that the connection release mechanism 200 is completed, and the movement between the panels does not cause safety hazards.

The second panel 220 is further provided with a fixing rib 233, and for a specific first connection mechanism 240, both front and rear ends of the first connection mechanism in the rotation direction of the opening are respectively engaged with the fixing rib 233 and the driving rib 232, and at the same time, the front end 242 of the first connection mechanism is further provided with a chamfer 2421, so that the first connection mechanism 240 can be inserted into the slot 231, and after the reverse rotation, the saw blade 12 is firmly fixed.

Fig. 7-11, 12a, 12b show another embodiment of the quick release system of the invention, the main construction of which is also described above, which differs from the previous embodiment mainly in the shape of the slot 231, in which the slot 231 is provided in a fan-like shape and also has one side as the second force-bearing end 202, and correspondingly the construction of the first connection means 240 is also changed, which is wider in relation to the previous embodiment to accommodate the new slot 231.

Further, in the present embodiment, the slot 231 functions to allow the first connecting mechanism 240 to be inserted and chip removed at the same time, which is another difference of the present embodiment from the first embodiment.

Fig. 14-15 show a third embodiment of the quick release system of the present invention, which is essentially identical in its main construction to the second embodiment, except that in this embodiment the drive ribs 232 and the second force-bearing ends 202 provided thereon are each radially curved (non-straight), i.e. extend radially and have a certain spiral effect, and that the drive ribs 232 are curved towards the same direction for a proper engagement of the locking blocks 241.

A rapid saw blade release hole digger assembly comprises a saw blade 12, a connection release mechanism 200 and a transmission connecting piece 13, wherein the tail end of the transmission connecting piece 13 is used for being connected to a driving device, and the front end of the transmission connecting piece is connected to the rear end of the saw blade 12 through the connection release mechanism 200.

The first connection mechanism 240 is detachably matched with the connection release mechanism 200, a central drilling 203 is arranged at the center of the connection release mechanism 200, the connection release mechanism 200 comprises a second connection mechanism 230 matched with the first connection mechanism 240, the first connection mechanism 240 is provided with a first stress end 201, the second connection mechanism comprises a second stress end 202, the arrangement direction of the first stress end 201 and the second stress end 202 corresponds to the driving rotation direction, and after the first connection mechanism 240 is matched with the connection release mechanism 200, the first stress end 201 and the second stress end 202 are matched to drive the saw blade to rotate.

The second connection means 230 has a plurality of second connection means 230, each second connection means 230 being arranged in a non-collinear manner, the first connection means 240 being in one-to-one correspondence with the second connection means 230, the second stress end 202 being arranged in a radial direction, which radial direction and which refers to a strict radial direction but which is arranged substantially in a radial direction, so that after engagement of the saw blade with the connection release means 200 it is arranged concentrically with the central borehole 203.

Preferably, the connection release mechanism 200 further includes a first panel 210 and a second panel 220, the second panel 220 is movably disposed relative to the first panel 210, the first panel 210 and the second panel 220 are cooperatively formed into a second connection mechanism 230, the second stress end 202 is disposed on the first panel 210 or the second panel 220, and the first panel 210 or the second panel 220 with the second stress end 202 is in transmission connection with the transmission connection member 13.

The transmission connecting member 13 further comprises a spring seat 135, two ends of the spring 2201 respectively and correspondingly match with the spring seat 135 and the second panel 220 or the first panel 210, the first connecting mechanism 240 further comprises a locking block 241 which extends backwards along the second stress end 202, and the second connecting mechanism 230 correspondingly comprises a locking groove 2301, and the locking block 241 is matched into the locking groove 2301 to connect the saw blade 12 with the release mechanism 200.

A quick release method of a hole opener saw blade, comprising the steps of:

First, the hole digger is configured to include the hole digger blade quick change system of any of the embodiments described above, preferably a quick change system having locking blocks 241 and locking slots 2301.

Next, the saw blade 12 is reversely rotated so that the tightening piece 241 is separated from the locking groove 2301.

Finally, the first attachment mechanism 240 of the distal end of the blade 12 is axially moved away from the second attachment mechanism 230 of the attachment release mechanism 200 to effect a quick release of the blade 12 from the attachment release mechanism 200.

The above is the step of releasing the saw blade 12 for separation, and the opposite operation is performed when the saw blade 12 is mounted, i.e., the first coupling mechanism 240 of the end of the saw blade 12 is axially moved to be fitted into the second coupling mechanism 230 of the coupling and releasing mechanism 200, and then the saw blade 12 is rotated to be fitted into the locking groove 2301 so that the saw blade 12 is firmly coupled with the coupling and releasing mechanism 200.

Claims

1. The quick replacement system for the saw blade of the hole digger comprises a first connecting mechanism (240) and a connecting and releasing mechanism (200), wherein the first connecting mechanism (240) is arranged at the rear end of the saw blade, the rear end of the connecting and releasing mechanism (200) is used for being connected with a driving device,

The connecting and releasing mechanism (200) comprises a second connecting mechanism (230) matched with the first connecting mechanism (240), a first stress end (201) is arranged on the first connecting mechanism (240), the second connecting mechanism comprises a second stress end (202), the arrangement direction of the first stress end (201) and the second stress end (202) corresponds to the driving rotation direction, so that after the first connecting mechanism (240) is matched with the connecting and releasing mechanism (200), the first stress end and the second stress end are matched to drive the saw blade to rotate;

The second connecting mechanisms (230) are provided with a plurality of connecting mechanisms which are not arranged in a collinear way, the first connecting mechanisms (240) are matched with the second connecting mechanisms (230) in a one-to-one correspondence way, the second stress ends (202) are arranged along the radial direction so that after the saw blade is matched with the connection release mechanism (200), the saw blade is arranged concentrically with the central drilling hole (203), the second connecting mechanisms (230) are at least three and are uniformly arranged along the circumferential direction, and the second stress ends (202) are arranged on the front end surface (205) of the connection release mechanism (200);

The first connecting mechanism (240) further comprises a locking block (241) which is formed by extending backwards along the second stress end (202), the second connecting mechanism (230) is correspondingly provided with a locking groove (2301), and the locking block (241) is matched into the locking groove (2301) to connect the saw blade (12) with the release mechanism (200);

The connection release mechanism (200) comprises a first panel (210) and a second panel (220), wherein the second panel (220) is movably arranged relative to the first panel (210), the first panel (210) and the second panel (220) are matched to form a second connection mechanism (230), and the second stress end (202) is arranged on the first panel (210) or the second panel (220).

2. The quick change system of a hole cutter saw blade according to claim 1, further comprising a transmission connecting piece (13), wherein the tail end of the transmission connecting piece (13) is provided with a transmission unit (131) to be connected with a driving device, and the front end is provided with a first panel (210) and a second panel (220) to be matched with the transmission connecting piece;

The spring structure comprises a spring seat (135) arranged on a transmission connecting piece (13), two ends of a spring (2201) are respectively matched with the spring seat (135) and a second panel (220) or a first panel (210), the thread structure comprises external threads arranged on the transmission connecting piece and internal threads arranged on the first panel or the second panel, and the card structure comprises a plurality of clamping grooves arranged on the transmission connecting piece and cards matched in the clamping grooves.

3. The quick change system of a hole cutter saw blade according to claim 1, wherein the second stress end (202) is disposed on the first panel (210), and the first panel (210) and the transmission connecting member (13) are respectively provided with transmission connecting structures so as to be in transmission connection with each other.

4. The hole punch saw blade quick change system of claim 1, wherein a rotational positioning mechanism is provided between the first panel (210) and the second panel (220) such that the two are only axially accessible or removable.

5. A rapid saw blade release hole digger assembly comprises a saw blade (12), a connection release mechanism (200) and a transmission connecting piece (13), wherein the tail end of the transmission connecting piece (13) is used for being connected to a driving device, the front end of the transmission connecting piece is connected with the rear end of the saw blade (12) through the connection release mechanism (200),

The connecting and releasing mechanism (200) is detachably matched with the first connecting mechanism (240), a central drilling hole (203) is formed in the center of the connecting and releasing mechanism (200), the connecting and releasing mechanism (200) comprises a second connecting mechanism (230) matched with the first connecting mechanism (240), a first stress end (201) is arranged on the first connecting mechanism (240), the second connecting mechanism comprises a second stress end (202), the arrangement direction of the first stress end (201) and the second stress end (202) corresponds to the driving rotation direction, and after the first connecting mechanism (240) is matched with the connecting and releasing mechanism (200), the first stress end and the second stress end are matched to drive the saw blade to rotate;

The second connecting mechanisms (230) are provided with a plurality of connecting mechanisms which are not arranged in a collinear way, the first connecting mechanisms (240) are matched with the second connecting mechanisms (230) in a one-to-one correspondence way, and the second stress ends (202) are arranged along the radial direction so that after the saw blade is matched with the connection release mechanism (200), the saw blade is concentrically arranged with the central drilling hole (203);

the connection release mechanism (200) comprises a first panel (210) and a second panel (220), wherein the second panel (220) is movably arranged relative to the first panel (210), the first panel (210) and the second panel (220) are matched to form a second connection mechanism (230), a second stress end (202) is arranged on the first panel (210) or the second panel (220), and the first panel (210) or the second panel (220) provided with the second stress end (202) is in transmission connection with the transmission connecting piece (13);

The transmission connecting piece (13) further comprises a spring seat (135), two ends of the spring (2201) are respectively matched with the spring seat (135) and the second panel (220) or the first panel (210), the first connecting mechanism (240) further comprises a locking block (241) which is formed by extending backwards along the second stress end (202), the second connecting mechanism (230) is correspondingly provided with a locking groove (2301), and the locking block (241) is matched into the locking groove (2301) to connect the saw blade (12) with the release mechanism (200).

6. A method of quick release of a hole opener saw blade comprising the steps of:

firstly, configuring a hole digger to comprise the hole digger saw blade quick replacement system according to any one of 1-4;

secondly, rotating the saw blade (12) so that the tightening block (241) is separated from the locking groove (2301);

Finally, the saw blade (12) is axially moved such that the first attachment mechanism (240) at the end thereof is disengaged from the second attachment mechanism (230) of the attachment release mechanism (200) to effect a quick disengagement of the saw blade (12) from the attachment release mechanism (200).