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

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 saw blade quick-change method 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 direction of the two corresponds 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

Technical Field

[0001] The present invention belongs to the technical field of electric tools, and in particular relates to a quick-change system for a hole opener saw blade, a hole opener assembly having the quick-change system, and a saw blade quick-change method based on the system. Background Art

[0002] A hole opener is a circular saw that is used to cut circular holes. It can be used to open holes in metal, wood, plastic, glass, stone and other materials. It is easy to operate and carry, and has a wide range of uses.

[0003] The existing hole opener is mainly composed of a rotating handle and a hole opener body. The rotating handle and the hole opener body are generally connected together by threads. If the hole opener body needs to be replaced, the original hole opener screw must be unscrewed first, and then the new hole opener body must be installed. However, since the hole opener body has been drilled, the threads may slip or get stuck, making it difficult to disassemble. It is also difficult to quickly clean out the waste in the hole opener body.

[0004] For this reason, this application is designed to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a quick replacement system for hole opener saw blades which is easy to install and remove saw blades and easy to remove waste materials, a hole opener component having the system, and a quick replacement method for saw blades based on the system.

[0006] To achieve the above object, the scheme adopted by the present invention is:

[0007] A quick replacement system for a hole opener saw blade comprises a first connecting mechanism and a connecting and releasing mechanism. 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 to be connected to a driving device.

[0008] The first connecting mechanism is detachably matched with the connecting and releasing mechanism, and a center drill hole is provided in the center of the connecting and releasing mechanism; the connecting and releasing mechanism includes a second connecting mechanism matched with the first connecting mechanism, the first connecting mechanism is provided with a first force-bearing end, and the second connecting mechanism includes a second force-bearing end; the setting direction of the first force-bearing end and the second force-bearing end corresponds to the direction of driving rotation, so that after the first connecting mechanism is matched with the connecting and releasing mechanism, the two can cooperate to drive the saw blade to rotate.

[0009] Preferably, there are multiple second connecting mechanisms, and they are not arranged in a colinear manner; the first connecting mechanism and the second connecting mechanism are matched one by one; the second force-bearing end is arranged along the radial direction, so that after the saw blade is matched with the connection release mechanism, it is arranged concentrically with the central drill hole.

[0010] Preferably, there are at least three second connecting mechanisms, which are evenly arranged along the circumferential direction.

[0011] Preferably, the second force-bearing end is arranged on the front end surface of the connection and release mechanism and is arranged in the radial direction, including two arrangements: being directly arranged on the front end surface and being arranged inside the connection and release mechanism after extending an appropriate distance from the front end surface toward the inside of the connection and release mechanism.

[0012] Preferably, the first connection mechanism further includes a locking block, which is formed by extending backward along the second force-bearing end, and the second connection mechanism has a locking groove accordingly, and the locking block is fitted into the locking groove to connect the saw blade with the release mechanism. The locking block and the locking groove can be rotated after fitting to lock, so that the saw blade can be limited in the axial direction, so that it forms a whole with the quick release mechanism and is not easy to fall off.

[0013] Preferably, the connection release mechanism includes a first panel and a second panel, and the second panel is movably arranged to approach or move away from the first panel to achieve tightening or loosening between the two panels; and the first panel and the second panel are cooperated to form a second connection mechanism, and the second force-bearing end is arranged on the first panel or the second panel.

[0014] Furthermore, it also includes a transmission connecting piece, the end of which is provided with a transmission unit to be connected with the driving device, and the front end is provided with the first panel and the second panel to cooperate with it.

[0015] Preferably, there are various ways to realize the movable setting between the first panel and the second panel. For example, a certain panel can be movably matched with the transmission connection member through a spring structure, a threaded structure, a card structure, etc. to realize the movable setting between the two panels.

[0016] When the spring structure is used for active cooperation, a spring seat can be further provided on the transmission connection member, and the two ends of the spring are respectively cooperated with the spring seat and the second panel or the first panel; for example, the two ends are respectively against the spring seat and the second panel or the first panel, or the two ends are further fixed. The spring can make it more convenient for the locking block to fit into the locking groove, and can also ensure that the two panels can provide a certain force on the locking block in the locked state to ensure the locking effect.

[0017] When the threaded structure is used for active cooperation, an external thread can be set on the transmission connection member, and an internal thread can be set on the first panel or the second panel accordingly, so that the first and second panels can be rotated on the transmission connection member to achieve relative approach or distance between the two panels to achieve their active setting.

[0018] When the card structure is used for active cooperation, a plurality of card slots can be set on the transmission connection part, and additional cards that can be engaged in the card slots can be set, so that the setting position of the first panel or the second panel can be adjusted by engaging the cards in the card slots at different positions, thereby achieving relative proximity or distance between the two panels to realize their active setting.

[0019] Preferably, the second force-bearing end is arranged on the first panel, and the first panel and the transmission connection member are respectively provided with transmission connection structures so that the two are transmission-connected. This method is easy to manufacture and practical.

[0020] Preferably, a rotation positioning mechanism is provided between the first panel and the second panel so that the two can only move axially closer or farther away. Of course, when the movable arrangement between the two panels adopts a threaded structure, the rotation positioning mechanism may have an adverse effect, and the rotation positioning mechanism should not be provided at this time.

[0021] A saw blade quick-release hole opener assembly comprises a saw blade, a connection release mechanism and a transmission connection member, wherein the end of the transmission connection member is used to be connected to a driving device, and the front end of the transmission connection member can be connected to the rear end of the saw blade through the connection release mechanism.

[0022] The first connecting mechanism cooperates with the connecting and releasing mechanism in a detachable manner, and a center drill hole may be provided at the center of the connecting and releasing mechanism. The connecting and releasing mechanism includes a second connecting mechanism that cooperates with the first connecting mechanism. The first connecting mechanism is provided with a first force-bearing end, and the second connecting mechanism includes a second force-bearing end. Moreover, the setting directions of the first force-bearing end and the second force-bearing end correspond to the direction of driving rotation so as to transmit torque during rotation, that is, after the first connecting mechanism cooperates with the connecting and releasing mechanism, the two cooperate to drive the saw blade to rotate.

[0023] Preferably, there are multiple second connecting mechanisms, and they are arranged in a non-collinear manner; the first connecting mechanism and the second connecting mechanism are matched one by one; the second force-bearing end is arranged along the radial direction, so that after the saw blade is matched with the connection release mechanism, it is arranged concentrically with the central drill hole.

[0024] Preferably, the connection release mechanism includes a first panel and a second panel, and the second panel can be movably arranged to approach or move away from the first panel to achieve tightening or loosening between the two panels; the first panel and the second panel cooperate to form a second connection mechanism, and the second force-bearing end is arranged on the first panel or the second panel, and the first panel or the second panel provided with the second force-bearing end is transmission-connected to the transmission connecting member.

[0025] The transmission connection also includes a spring seat, and both ends of the spring are respectively matched with the spring seat and the second panel or the first panel, for example, they are abutted or fixed; the first connection mechanism also includes a locking block, which is formed by extending backward along the second force-bearing end, and the second connection mechanism correspondingly has a locking groove, and the locking block is matched into the locking groove to connect the saw blade and the release mechanism.

[0026] A method for quickly releasing a hole opener saw blade comprises the following steps:

[0027] First, a hole opener is configured to include any of the above-mentioned quick-change systems for the saw blade of the hole opener, preferably a quick-change system having a locking block and a locking slot;

[0028] Secondly, rotate the saw blade to separate the locking block from the locking groove;

[0029] Finally, the saw blade is axially moved to separate the first connection mechanism at its end from the second connection mechanism of the connection release mechanism, so as to realize the rapid separation of the saw blade from the connection release mechanism.

[0030] The hole opener saw blade quick replacement system of the present invention can realize the quick installation and release of the saw blade through the first connecting mechanism and the second connecting mechanism, so that the size and specification of the saw blade can be quickly replaced when the hole opener is used.

[0031] Preferably, the quick-change system may also include a locking block and two panels that can be displaced axially. The locking block is fitted between the two panels. When released, at least one of the panels is displaced to expand the gap, and then the saw blade is rotated to separate the locking block from it, and the saw blade can be removed axially in the best possible manner. That is, the release operation only includes the three steps of unlocking, rotating, and displacing, and the operation is very convenient.

[0032] In addition, the second connecting mechanism of the quick-change system can be arranged on the quick-release mechanism to extend from the central drill hole to the periphery along its radial direction. The specific shape of the second connecting mechanism can be along a straight line, a curve or a combination of the two. Such a connecting structure setting can also adapt to saw blades of any diameter within its size range without limiting the specific diameter of the saw blade. This can greatly expand the range of saw blade sizes that can be adapted by the quick-change system. Even different standards such as British standards and American standards can be adapted, which greatly improves its compatibility. This is an additional advantage of the quick-change system of the present invention.

[0033] The hole opener assembly and the saw blade quick replacement method of the present invention are both implemented based on the above-mentioned quick replacement system, and thus they also have the above-mentioned advantages accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1is a three-dimensional structural schematic diagram of a quick replacement system for a hole opener saw blade according to a first embodiment of the present invention;

[0035] Figure 2 yes Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0036] Figure 3 yes Figure 1 A schematic diagram of the cooperation between the connection release mechanism and the center drill of the embodiment;

[0037] Figure 4 yes Figure 1 A schematic diagram of the structural decomposition of the connection release mechanism of an embodiment;

[0038] Figure 5 yes Figure 1 A schematic cross-sectional view of the quick-change system of an embodiment;

[0039] Figure 6a yes Figure 1 A schematic structural diagram of a saw blade according to an embodiment of the present invention, Figure 6b yes Figure 6a A partial enlarged schematic diagram of

[0040] Figure 7 is a schematic diagram of the three-dimensional structure of a quick replacement system for a hole opener saw blade according to a second embodiment of the present invention;

[0041] Figure 8 yes Figure 7 A schematic diagram of the structural decomposition of an embodiment;

[0042] Fig. 9 yes Figure 7 A schematic diagram of the cooperation between the connection release mechanism and the center drill of the embodiment;

[0043] Fig.10 yes Figure 7 A schematic diagram of the structural decomposition of the connection release mechanism of an embodiment;

[0044] Fig.11 yes Figure 7 A schematic cross-sectional view of the quick-change system of an embodiment;

[0045] Fig.12a yes Figure 7 A schematic structural diagram of a saw blade according to an embodiment of the present invention, Figure 12b yes Fig.12a A partial enlarged schematic diagram of

[0046] Fig.13 It is a schematic diagram of the cooperation between the locking groove provided in the integrally formed connection release mechanism and the locking block provided in other embodiments of the present invention;

[0047] Fig.14is a schematic diagram of the three-dimensional structure of a quick replacement system for a hole opener saw blade according to a third embodiment of the present invention;

[0048] Fig.15 yes Fig.14 A schematic diagram of the structural decomposition of the connection and release mechanism in the embodiment. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the present invention, and thus to more clearly define the scope of the present invention, the present invention is described in detail with respect to some specific embodiments of the present invention. It should be noted that the following are only some specific implementation methods of the present invention, which are only part of the embodiments of the present invention, wherein the specific and direct description of the relevant structure is only for the convenience of understanding the present invention, and each specific feature does not naturally and directly limit the scope of implementation of the present invention. The conventional selection and replacement made by those skilled in the art under the guidance of the present invention should be regarded as within the scope of the present invention.

[0050] A quick-change system for a hole opener saw blade includes a first connecting mechanism 240 and a connecting release mechanism 200; the first connecting mechanism 240 is disposed at the rear end 122 of the saw blade 12, and the rear end of the connecting release mechanism 200 is used to connect to a drive device, so that the saw blade 12 is attached to the drive device (e.g., a drive motor, an electric drill) via the connecting release mechanism 200.

[0051] The first connecting mechanism 240 is detachably matched with the connecting and releasing mechanism 200 , so that the saw blade 12 can be separated from the connecting and releasing mechanism 200 when necessary, so as to achieve the purpose of replacing the saw blade 12 or cleaning the waste inside it.

[0052] A center drill hole 203 is provided at the center of the connection and release mechanism 200 for the center drill 11 to cooperate therein; the connection and release mechanism 200 includes a second connection mechanism 230 that can cooperate with the first connection mechanism 240, and the first connection mechanism 240 and the second connection mechanism 230 can be detachably matched to realize the detachable matching connection between the above-mentioned saw blade 12 and the connection and release mechanism 200.

[0053] The first connecting mechanism 240 is provided with a first force-bearing end 201, and the second connecting mechanism includes a second force-bearing end 202; the setting direction of the first force-bearing end 201 and the second force-bearing end 202 corresponds to the direction of the driving rotation, that is: the first force-bearing end 201 and the second force-bearing end 202 cooperate with the rear of the rotation of the first connecting mechanism 240 (that is, the rear of the rotation direction during the hole opening operation to play a supporting role).

[0054] The connection release mechanism 200 can be in a relatively flat disc shape as a whole, and has a front end face 205 and a rear end face 206. The first force-bearing end 201 is disposed on the front end face 205, including two ways of being directly disposed on the front end face 205 and being disposed inside the connection release mechanism 200 after extending from the front end face 205 to a proper distance. The outer contour of the connection release mechanism 200 is preferably circular to avoid potential safety hazards when it rotates.

[0055] When the connection release mechanism 200 is driven to rotate by the driving device, the torque is transmitted to the rear end 122 of the saw blade via the first force-bearing end 201 and the second force-bearing end 202, so that after the first connection mechanism 240 cooperates with the connection release mechanism 200, the first force-bearing end 201 cooperates with the second force-bearing end 202 to drive the saw blade 12 to rotate accordingly, so that the divided teeth 121 at the front end of the saw blade 12 rotates to perform the hole opening operation.

[0056] There are multiple second connection mechanisms 230, and each second connection mechanism 230 is arranged in a non-collinear manner; when arranged in a collinear manner, the saw blade cannot be fixed and is allowed to move along the setting direction of the second connection mechanism 230, which will affect the realization of the basic function of the hole opener and is not desirable. In addition, the first connection mechanism 240 and the second connection mechanism 230 are preferably matched one by one.

[0057] Preferably, the second force-bearing end 202 is arranged in a radial direction, that is, it extends outward from the vicinity of the central area of ​​the connection release mechanism 200 to form the second force-bearing end 202, which can be extended in a straight line (i.e., radially) or non-linearly, that is: while extending radially, there is a certain degree of bending, thereby forming a second force-bearing end 202 similar to a rotating spiral line. Such a structural design of the second force-bearing end 202 can make the saw blade 12 and the center drill 11 set in the center drill hole 203 concentrically arranged after the saw blade is matched with the connection release mechanism 200, that is, through such a design, it is ensured that the saw blade 12 and the center drill 11 set in the center drill hole 203 are always concentric, ensuring that the hole opening effect meets expectations.

[0058] In the best case, the number of the second force-bearing ends 202 is at least three, and they are evenly arranged along the circumferential direction; obviously, when there are three, they are at an angle of 120° to each other, when there are four, they are at an angle of 90° to each other, and so on. This can not only make it more beautiful, but also make the first connecting mechanism 240 evenly arranged at the rear end 122 of the saw blade, so as to facilitate the loading and unloading operation of the saw blade 12.

[0059] For example: Figure 2As shown, the first connection mechanism 240 and the second connection mechanism 230 each have three, and they are arranged at an angle of 120°; in addition, the number of the first connection mechanism 240 and the second connection mechanism 230 can also be four, five or more, and it is better to arrange them evenly along the circumferential direction to ensure the concentricity of the center drill 11 and the saw blade 12. Of course, in the above scheme, the uniform arrangement is not necessary, and the non-uniform arrangement has no adverse effect on the concentricity, but it will affect the installation angle of the saw blade 12, and directional installation may be required.

[0060] To ensure that the saw blade 12 is firmly fitted and easy to use after installation, the first connection mechanism 240 further includes a locking block 241, which is formed by extending backward along the second force-bearing end 202 (in the direction opposite to the rotation direction during the hole-opening operation), and the locking block 241 extending backward cooperates with the first force-bearing end 201 and the rear end 122 of the saw blade to form a notch 2411; and the second connection mechanism 230 has a locking groove 2301 accordingly, and the thickness difference between the locking groove 2301 and the front end face 205 should match the notch 2411. When the connection release mechanism 200 is composed of the first panel 210 and the second panel 220, the axial width of the notch 2411 is the same as or slightly larger than the thickness of 210, and the two can be connected by snapping.

[0061] After the saw blade 12 is matched with the connection release mechanism 200, the first connection mechanism 240 is at least partially matched with the second connection mechanism 230, and the saw blade 12 is rotated in the reverse direction so that the locking block 241 is matched with the locking groove 2301, so that the saw blade 12 is firmly connected with the connection release mechanism 200 in the axial direction due to the matching of the locking block 241 and the locking groove 2301, and is not easy to fall off. Among them, the forward direction refers to the rotation direction during the hole drilling operation, and the axial direction refers to the setting direction of the center drill.

[0062] Considering that the locking block 241 needs to be rotated when locking, the locking grooves 2301 of the second connecting mechanism 230 that are not linear and evenly arranged need to be additionally configured so that the setting directions of the second connecting mechanisms 230 are the same. This can be achieved by rotating the locking groove 2301 of a second connecting mechanism 230 along the center by a corresponding angle, otherwise it may cause abnormal matching of the saw blade 12. Of course, for the first connecting mechanism 240 without the locking block 241, it is a friction match between the first force-bearing end 201 and the second force-bearing end 202 after axial matching, and does not involve rotation, so the above content does not need to be considered.

[0063] In order to facilitate the control of the above-mentioned axial locking, the connection release mechanism 200 can be composed of a first panel 210 and a second panel 220, and the second panel 220 is movably arranged relative to the first panel 210, that is, the two can be relatively close to or far away in the axial direction; the first panel 210 and the second panel 220 cooperate to form a second connection mechanism 230, and the second force-bearing end 202 is arranged on the first panel 210 or the second panel 220. By default, the first panel 210 can be arranged close to the second panel 220, and the distance between the two can accommodate the locking block 241, and the locking groove 2301 is formed by the gap between the two; when the saw blade 12 needs to be disassembled, the first panel 210 is operated to separate from the second panel 220, and the saw blade 12 is rotated in the opposite direction to separate the locking block 241 from the locking groove 2301, and the saw blade 12 is moved out axially, and the saw blade 12 is separated from the connection release mechanism 200.

[0064] Although, in the above case, the second force-bearing end 202 is arranged on the first panel 210, the first force-bearing end 201 can also be arranged at the front end after the locking block 241 is extended, and the second force-bearing end 202 is changed accordingly to cooperate with it, which is also feasible in actual implementation; in this case, the second force-bearing end 202 can be arranged on the first panel 210 or the second panel 220, or it can be formed by the corresponding locking groove 2301 wall in the integrally formed connection release mechanism 200 (such as Fig.13 shown).

[0065] In order to achieve the purpose of axially movably movably setting the second panel 220 and the first panel 210, the system can further include a transmission connecting member 13, at the end of which a transmission unit 131 is provided (for example, a hexagonal prism-shaped structure design, or other existing drive connection structures, which are non-circular) to connect with the drive device, and its front end is used for the first panel 210 and the second panel 220 to cooperate with it; at least one of the first panel 210 and the second panel 220 is axially movably matched with the front end of the transmission connecting member 13.

[0066] For example: Figure 2As shown, the transmission connection member 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 connection member 13 is provided with a threaded portion 133, a transmission portion 134 and a movable portion 136 in sequence; and the diameter of the movable portion 136 is larger than the transmission portion 134, so that after the first panel 210 is set on the transmission portion 134, its two ends are respectively limited by the nut 137 and the movable portion 136, so that the first panel 210 is fixedly matched with the transmission connection member 13 in the axial direction; and the second panel 220 is axially displaceable on the movable portion 136, so that the second panel 220 and the first panel 210 can be axially movable. Of course, this is only a design scheme. In fact, it is feasible to interchange the structures of the two or set them both to be axially displaceable.

[0067] like Figure 2 , 5 As shown, the center drill hole 203 is arranged in the transmission connecting member 13, and the transmission connecting member 13 is also provided with a fixing screw hole 132 that penetrates the center drill hole 203. After the center drill 11 is arranged in the center drill hole 203, the fixing screw 111 is screwed into the fixing screw hole 132 and pushed into the transmission end of the end of the center drill 11, so that the center drill 11 is transmission-connected to the transmission connecting member 13.

[0068] In order to further realize the automatic locking function on the axis, the transmission connection 13 also includes a spring seat 135, and the two ends of the spring 2201 respectively cooperate with the transmission connection 13 and the connection release mechanism 200, so that the second panel 220 can be axially approached or moved away from the first panel 210; and in the preferred case, the spring 2201 is initially configured to be in a compressed state, so that the two panels are relatively clamped by default, and when the saw blade needs to be removed, force is applied to the spring 2201 to further compress it.

[0069] For example: Figure 2 , 5 As shown, the transmission connection member 13 is provided with a spring seat 135 and a spring 2201, and the two ends of the spring 2201 are respectively matched with the spring seat 135 and the spring sleeve 2202, and the spring sleeve 2202 is connected to the second panel 220, and the spring 2201 is appropriately compressed in the initial state, so that the second panel 220 can initially act on the locking block 241. When the saw blade 12 needs to be removed, the spring sleeve 2202 is operated to further compress the spring 2201, and the second panel 220 is separated from the first panel 210, so as to facilitate the removal of the saw blade 12. In addition to the above-mentioned spring structure, rotating any panel, or making a panel displaceable and fixed on the transmission connection member 13, is also a feasible way to realize the movable arrangement of the two panels.

[0070] like Figure 2 As shown, in a preferred case, in order to achieve the transmission effect for the saw blade 12, the second force-bearing end 202 can be set on the first panel 210; at the same time, the first panel 210 and the transmission connection member 13 are respectively provided with a transmission connection structure, such as a double D-shaped structure or a multi-prism structure, to achieve the rotation transmission of the two. This is one of the transmission methods, and in fact, it can also be set on the second panel 220 and connected to the transmission connection member 13.

[0071] At the same time, 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 during disassembly, a rotation positioning mechanism may be provided between the first panel 210 and the second panel 220 so that the two can only move axially closer or farther away from each other, but cannot rotate relative to each other. The above-mentioned rotation positioning mechanism may be various, for example: a guide structure is also provided on the movable portion 136 accordingly, and the center hole of the second panel 220 has a corresponding shape, including but not limited to using a polygonal column as the movable portion 136, and providing a guide plane on the cylindrical movable portion 136; or, as Figure 4 As shown, grooves 204 arranged along the axial direction are respectively provided on the first panel 210 and the second panel 220 to serve as rotation positioning members, so that rotation between the two is prohibited.

[0072] Figure 1-5 , 6a, 6b show a first embodiment of the quick release system of the present invention, whose main structure is as described above. The main feature of the quick release system is that a long strip-shaped slot 231 formed by two transmission edges 232 is formed on the first panel 210, and one side of the slot 231 serves as the second force-bearing end 202. The first connecting mechanism 240 can be partially inserted into the slot 231 to cooperate with it; at the same time, the first panel 210 and the transmission connecting member 13 cooperate with each other through a double D-shaped transmission connecting mechanism to transmit torque, and the second connecting mechanism 230 is formed by the slot 231 and the gap between the first panel 210 and the second panel 220.

[0073] The first panel 210 also includes a chip discharge hole 211, which can discharge wood chips when the end of the saw blade 12 is opened; the second panel 220 includes an end face 221 and a side face 222, and the first panel 210 is matched with the inside of the side face 220 of the second panel 220, so that the connection release mechanism 200 is complete and the movement between the two panels will not cause safety hazards.

[0074] A fixed edge 233 is also provided on the second panel 220. For a specific first connecting mechanism 240, its front and rear ends in the direction of rotation of the opening are respectively matched with the fixed edge 233 and the transmission edge 232; at the same time, a chamfer 2421 is also provided at the front end 242 of the first connecting mechanism, so that the first connecting mechanism 240 can be inserted into the slot 231 and the saw blade 12 can be firmly fixed after reverse rotation.

[0075] Figure 7-11 12a and 12b show another embodiment of the quick release system of the present invention, and its main structure is also as described above. The difference compared with the previous embodiment mainly lies in the shape of the slot 231. In this embodiment, the slot 231 is set to be fan-shaped, and also uses one side as the second force-bearing end 202; accordingly, the structure of the first connecting mechanism 240 is also changed, which is wider than the previous embodiment to adapt to the new slot 231.

[0076] In addition, in this embodiment, the slot hole 231 simultaneously plays the role of allowing the first connecting mechanism 240 to be inserted and removing chips, which is another difference between this embodiment and the first embodiment.

[0077] Figure 14-15 A third embodiment of the quick release system of the present invention is shown, and its main structure is basically the same as that of the second embodiment, except that, in this embodiment, the transmission rib 232 and the second force-bearing end 202 arranged thereon are both radially bent (non-straight), that is, they also have a certain spiral effect while extending radially; and, in order to ensure the normal cooperation of the locking block 241, the bending directions of the transmission ribs 232 are the same.

[0078] A hole opener assembly with a saw blade quick release includes a saw blade 12, a connection release mechanism 200 and a transmission connector 13. The end of the transmission connector 13 is used to connect to a drive device, and its front end is connected to the rear end of the saw blade 12 through the connection release mechanism 200.

[0079] The first connecting mechanism 240 is detachably matched with the connecting and releasing mechanism 200, and a center drill hole 203 is provided at the center of the connecting and releasing mechanism 200. The connecting and releasing mechanism 200 includes a second connecting mechanism 230 matched with the first connecting mechanism 240; the first connecting mechanism 240 is provided with a first force-bearing end 201, and the second connecting mechanism includes a second force-bearing end 202, and the setting direction of the first force-bearing end 201 and the second force-bearing end 202 corresponds to the direction of driving rotation, so that after the first connecting mechanism 240 is matched with the connecting and releasing mechanism 200, the two cooperate to drive the saw blade to rotate.

[0080] There are multiple second connecting mechanisms 230, and each second connecting mechanism 230 is arranged in a non-collinear manner; the first connecting mechanism 240 is matched with the second connecting mechanism 230 in a one-to-one correspondence; the second force-bearing end 202 is arranged along the radial direction, so that after the saw blade is matched with the connecting release mechanism 200, it is arranged concentrically with the center drill hole 203; wherein the radial direction does not refer to a strict diameter direction, but refers to being generally arranged along the radial direction.

[0081] In a preferred case, the connection release mechanism 200 also includes a first panel 210 and a second panel 220, and the second panel 220 is movably arranged relative to the first panel 210; the first panel 210 and the second panel 220 cooperate to form a second connection mechanism 230, and the second force-bearing 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 force-bearing end 202 is transmission-connected to the transmission connector 13.

[0082] The transmission connection member 13 also includes a spring seat 135, and the 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 connection mechanism 240 also includes a locking block 241, which is formed by extending backward along the second force-bearing end 202, and the second connection mechanism 230 correspondingly has 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.

[0083] A method for quickly releasing a hole opener saw blade comprises the following steps:

[0084] First, the hole opener is configured to include the hole opener saw blade quick replacement system described in any of the above embodiments, preferably a quick replacement system having a locking block 241 and a locking slot 2301.

[0085] Next, the saw blade 12 is rotated in the reverse direction so that the locking block 241 is separated from the locking groove 2301 .

[0086] Finally, the saw blade 12 is axially moved to separate the first connection mechanism 240 at the end thereof from the second connection mechanism 230 of the connection release mechanism 200 , so as to achieve rapid separation of the saw blade 12 from the connection release mechanism 200 .

[0087] The above are the steps for releasing and separating the saw blade 12. The opposite operation is performed when installing the saw blade 12, that is, the saw blade 12 is first moved axially so that the first connecting mechanism 240 at its end is engaged with the second connecting mechanism 230 of the connecting release mechanism 200; then the saw blade 12 is rotated so that the tightening block 241 is engaged with the locking groove 2301, so that the saw blade 12 is firmly connected to the connecting release mechanism 200.

Claims

1. A quick replacement system for a hole opener saw blade, comprising a first connecting mechanism (240) and a connecting release mechanism (200), wherein the first connecting mechanism (240) is arranged at the rear end of the saw blade, and the rear end of the connecting release mechanism (200) is used to connect to a driving device; characterized in that: The first connection mechanism (240) is detachably matched with the connection release mechanism (200), and a center drill hole (203) is provided 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 force-bearing end (201), and the second connection mechanism comprises a second force-bearing end (202); the setting direction of the first force-bearing end (201) and the second force-bearing end (202) corresponds to the direction of driving rotation, so that after the first connection mechanism (240) and the connection release mechanism (200) are matched, the two cooperate to drive the saw blade to rotate; The second connection mechanism (230) has a plurality of members, which are arranged non-collinearly; the first connection mechanism (240) is matched with the second connection mechanism (230) in a one-to-one correspondence; the second force-bearing end (202) is arranged in a radial direction so that after the saw blade is matched with the connection release mechanism (200), it is arranged concentrically with the central bore hole (203); the second connection mechanism (230) has at least three members, which are evenly arranged in a circumferential direction; the second force-bearing end (202) is arranged on a front end surface (205) of the connection release mechanism (200); The first connection mechanism (240) further comprises a locking block (241) which is formed extending backward along the second force-bearing end (202); the second connection mechanism (230) correspondingly comprises a locking groove (2301); the locking block (241) fits 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) cooperate to form a second connection mechanism (230), and the second force-bearing end (202) is arranged on the first panel (210) or the second panel (220).

2. The hole opener saw blade quick replacement system according to claim 1, characterized in that: It also includes a transmission connecting member (13), the transmission connecting member (13) having a transmission unit (131) at the end thereof for connecting to the driving device, and a front end for the first panel (210) and the second panel (220) to cooperate with it; at least one of the two panels is movably matched to the transmission connecting member (13) through a spring structure, a thread structure or a card structure, so as to realize the above-mentioned movable setting between the two panels; The spring structure comprises a spring seat (135) arranged on the transmission connection member (13), and two ends of the spring (2201) respectively cooperate with the spring seat (135) and the second panel (220) or the first panel (210); the thread structure comprises an external thread arranged on the transmission connection member, and an internal thread arranged on the first panel or the second panel; the card structure comprises a plurality of card slots arranged on the transmission connection member, and cards matched in the card slots.

3. The hole opener saw blade quick replacement system according to claim 1, characterized in that: The second force-bearing end (202) is arranged on the first panel (210), and the first panel (210) and the transmission connection member (13) are respectively provided with transmission connection structures so that the two are transmission-connected.

4. The hole opener saw blade quick replacement system according to claim 1, characterized in that: A rotation positioning mechanism is provided between the first panel (210) and the second panel (220), so that the two can only approach or move away from each other in the axial direction.

5. A saw blade quick-release hole opener assembly, comprising a saw blade (12), a connection release mechanism (200) and a transmission connection member (13), wherein the end of the transmission connection member (13) is used to be connected to a drive device, and the front end of the transmission connection member (13) is connected to the rear end of the saw blade (12) through the connection release mechanism (200); characterized in that: The connection release mechanism (200) is detachably matched with the first connection mechanism (240); a center drill hole (203) is provided at the center of the connection release mechanism (200); the connection release mechanism (200) includes a second connection mechanism (230) matched with the first connection mechanism (240); a first force-bearing end (201) is provided on the first connection mechanism (240); the second connection mechanism includes a second force-bearing end (202); and the setting direction of the first force-bearing end (201) and the second force-bearing end (202) corresponds to the direction of driving rotation, so that after the first connection mechanism (240) and the connection release mechanism (200) are matched, the two cooperate to drive the saw blade to rotate; The second connection mechanism (230) has a plurality of parts and is not arranged in a co-linear manner; the first connection mechanism (240) is matched with the second connection mechanism (230) in a one-to-one correspondence; the second force-bearing end (202) is arranged along the radial direction, so that after the saw blade is matched with the connection release mechanism (200), it is arranged concentrically 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) cooperate to form a second connection mechanism (230); the second force-bearing end (202) is arranged on the first panel (210) or the second panel (220); the first panel (210) or the second panel (220) provided with the second force-bearing end (202) is transmission-connected to the transmission connection member (13); The transmission connection member (13) further comprises a spring seat (135), and two ends of the spring (2201) respectively cooperate with the spring seat (135) and the second panel (220) or the first panel (210); the first connection mechanism (240) further comprises a locking block (241) which is formed by extending backward along the second force-bearing end (202), and the second connection mechanism (230) correspondingly has a locking groove (2301), and the locking block (241) is fitted into the locking groove (2301) to connect the saw blade (12) with the release mechanism (200).

6. A method for quickly releasing a hole opener saw blade, characterized in that: The following steps are involved: First, a hole opener is configured to include the hole opener saw blade quick replacement system described in any one of items 1 to 4; Secondly, the saw blade (12) is rotated to separate the locking block (241) from the locking groove (2301); Finally, the saw blade (12) is axially moved to separate the first connection mechanism (240) at the end thereof from the second connection mechanism (230) of the connection release mechanism (200), so as to achieve rapid separation of the saw blade (12) from the connection release mechanism (200).

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