Patent Application
20090142999
(a) Field of the Invention
The invention is related to a tool holder transmission structure of a stone chamfering machine which is mainly characterized in that a tool holder which can be operated to rotate is installed on a convex block of a side plate which is located at one end of the stone chamfering machine, whereby the tool holder can be positioned by an elastic lockpin which is preset on one side of the side plate Further, the tool holder and the frame can be completely matched when pushed by the compacting plate handle whereby the bottom driven gear of the multi-axis tool installed on the tool holder can be engaged with the transmission gear of the motor inside the Frame. Therefore, it is particularly useful to select different tools for stone chamfering operation according to practical needs, thereof to improve the inconveniences and disadvantages of changing tools in the conventional one-tool type machines.
(b) Description of the Prior Art
Generally, for overall appearance and to avoid accidents from sharpened edges of cut stones, the stone edges are usually chamfered to provide a nicer outlook and a better safety.
Most of the stone edge chamfering work is done by using a special purpose stone chamfering machine, whereby through reciprocating the stone chamfering machine and the transmission of inside installed motor to grind the tool to achieve the chamfering function.
Whereas, the structure design of the conventional stone chamfering machine is usually of the embodiment of “one tool-one motor” to achieve stone edges chamfering function. Under this embodiment, in case there are different specifications of stones or operation requirements for different grinding roughness, the tool replacement is necessary. The original tool is dismounted and replaced with a suitable tool, and then if there is a different operation requirement, the tool replacement will have to be repeated again. As such, it causes a lot of man hours loss and inconveniences while several sets of tools must also be prepared at the same time, and each tool need to be saved in special purpose storage boxes for easy carry that is also troublesome and inconvenient. Especially, if the tool is not saved in the storage box after replacement directly, it is easy to have a tool lost problem that may result in the case when a tool of particular specification is needed but cannot be found, and consequently the operation is seriously affected and an additional cost of re-purchase is generated, therefore this situation is hardly ideal and improvements are necessary.
Regarding the numerous problems and disadvantages of the conventional one-tool stone chamfering machine application, the inventor based on his many years of experience and skills in the related business has researched and developed the tool holder transmission structure of the invention, whereof it is mainly purposed to equip the stone chamfering machine with multiple tools of different specifications through the combination of structure designs thereby to provide a linkage transmission function which allows a suitable tool to be fetched corresponding to different operation requirements through a proper selection and change process.
Another purpose of the invention is to provide a simple operation for the tool change operation on the stone chamfering machine and to obtain an ideal transmission linkage function through the assembly design of structure, i.e. the main purpose of the invention is through the multi-axis tool holder design to achieve quick and simple tool change corresponding to different operation requirements while avoids troubles and inconveniences in repeatedly mounting/dismounting tools in the conventional structures and avoids the needs to carry or reserve the tool storage boxes. Further, the tool lost problem is less likely to happen. Therefore, it is particularly capable to provide good application and usefulness to the industry.
Through the schematic drawings and embodied examples, the structural composition, technical arts and achieved functions of the invention are further described below:
Please refer to the structural schematic drawing in
As illustrated in the drawing, the structure design of the stone chamfering machine of the invention is mainly comprised of a frame 10, inside which a transmission motor 20 is installed. A transmission gear 21 is installed on the spindle of the said transmission motor 20, whereof the said transmission gear 21 has one end exposed outside through Side Plate 30 of the frame 10 and forms a motion linkage by engaging with the driven gear 60 of tool 50 installed on the tool holder 40 which is guarded by the side plate 30, whereby the tool 50 is driven by the transmission motor 20 to do chamfering operation on the stones;
The bottom of the frame 10 is installed on a movable base 11, the said base 11 is installed with a pair of support posts 12 at its two sides to assemble with the handle 13. Further, the support posts 12 at one side of the base 11 is horizontally pierced through with a through hole to assemble with a tube connector 14 and a flexible water hose 15, wherein the said water hose 15 is extended to the position of tool 50 for spraying water to the operating zone of tool 50 in order to reduce the surrounding temperature and to avoid dusting, and thereby to constitute the basic functioning structure of the stone chamfering machine of the invention which is mainly characterized in the following:
The transmission motor 20 inside the frame 10 is installed with a downward offset so as to provide an eccentric relationship between the transmission gear 21 of the transmission motor 20 and the convex block 31 installed on the side plate 30 at one end of the frame 10, whereof the bottom of the convex block 31 is provided with a cut slot 32 which is extended in concave arc 33 to the two ends to allow the transmission gear 21 of the transmission motor 20 to appear partially exposed, and a screwed bolt 34 is installed at one end of the convex block 31 on the side plate 30, whereof the said screwed bolt 34 is pierced through the centered through hole 41 of tool holder 40 which enclose the side plate 30. The middle screwed section 341 of the screwed bolt 34 is installed with a limit ratchet wheel 35 which is engaged with and driven by the limit ratchet gear 361 which is installed inside the compacting plate handle 36, whereby to lock the limit ratchet wheel 35 and the screwed bolt 34 together, whereby to push the tool holder 40, frame 10 and side plate 30 into a complete matching relationship. Simultaneously, a pin seat is provided at a preset place on the side plate 30 to assemble with an elastic lockpin 38 which is pushed by spring 39 inside the pin seat 37 to protrude into the end face of the side plate 30, wherein through the several preset positioning holes 42 provided at the inside face of the tool holder 40, the elastic lockpin 38 is able to limit the related relationship between the tool holder 40, frame 10 and side plate 30 by lock inserting into any one of the positioning holes 42 of the tool holder 40 and restrain the tool holder 40 from rotation unless the elastic lockpin 38 is retreated out of the positioning hole 42 of the tool holder 40 by pulling the attached pull rod 381 of the elastic lockpin 38, and through reversely rotating the limit ratchet wheel 35 by the compacting plate handle 36 to lessen the compression on tool holder 40 so that the screwed bolt 34 which installed on the convex block 31 of the side plate can be properly rotated to change position.
The tools 50 are installed on the tool holder 40 in multi-angle and multi-axis embodiment, whereof the tool holder 40 is made to a polygon shell and is provided with a shaft hole 43 individually at its respective sides to install with bearing 44 and spindle 45, whereby it is sealed by the bearing cover 46 which is locked from outside. The inner end of spindle 45 is installed with a driven gear 60 while the outer end of spindle 45 is installed with a tool 50 so that each side of the tool holder 40 is respectively installed with tools 50 in different specifications, whereof each tool 50 has its own independent driven gear 60 to offer smooth change operation (such as: new tool replacement) for the tool 50 and spindle 45 if necessary. Further, one elastic positioning pin 47 is respectively installed at a position corresponding to each spindle 45 on the tool holder 40, whereof each spindle 45 is provided with at least one positioning cavity 451 to let elastic positioning pin 47 lock into it so as to prohibit spindle 45 from turning whereby to provide easy mounting/dismounting of tool 50, whereof the spring 471 which sleeves the elastic positioning pin 47 can push back elastic positioning pin 47 after disappearance of pressing force and release spindle 45 back to its original rotating status;
As such, by employing the above disclosed structure assembling design, through the same axis installation of tool holder 40, frame 10 and side plate 30 and the downward offset of transmission motor 20 on the frame 10, the transmission gear 21 of the transmission motor 20 is able to pierce through the cut slot 32 of the center convex block 31 on the side plate 30 of frame 10 and to reach a driving engagement relationship with the driven gear 60 of bottom tool 50 on the tool holder 40, whereby to perform stone chamfering operation through rotating the bottom tool 50 on the tool holder 40, and in case that tool 50 of different specification is required, the operator only has to turn the compacting plate handle 36 reversely to engage with and drive the limit ratchet gear 35 to release the compressing status on the tool holder 40, and further to retreat the elastic lockpin 38 located at one side of the side plate 30 to release the locking relationship with the tool holder 40, then the tool holder 40 along with its installed tools 50 can be properly rotated with the screwed bolt 34 of the convex block 31 on the side plate as the axis, whereby to rotate the tool 50 to the bottom position of tool holder 40 and to release the elastic lockpin 38 which is pushed by its internal spring 39 to recover it back to the original locking position with tool holder 40. In the last step, the compacting plate handle is operated to engage and drive the limit ratchet wheel 35 to compress the tool holder 40, frame 10 and side plate 30 to a complete match; thereby to achieve a perfect engaging relationship between the driven gear 60 of the tool 50 and the transmission gear 21 of the transmission motor 20 so as to recover the operating status of the stone chamfering machine. Therefore, it is particularly useful to provide a tool 50 direct change function for the stone chamfering machine; i.e. as the above description has shown, the structure design of the stone chamfering machine of the invention is through the multi-axis tools at different angles on the tool holder and its offset transmission motor to obtain the transmission embodiment so that when in facing different demands of stone chamfering operation, a suitable tool can be selected by directly rotating the tool holder, thus avoiding troubles and inconveniences in repeatedly mounting/dismounting tools in the conventional structures thereby to significantly reduce the replacement man hour costs and through the design allowing tools of different specifications to be prepared at the same time, additional tool storage boxes for carry and storage are no longer required, so the tool lost problem is unlikely to happen. In general, it can really solve the existing and derived problems of the conventional one-tool stone chamfering machines to greatly promote its applicability values and usefulness to the industry.
As summarized from the above descriptions, the tool holder transmission structure of the stone chamfering machine of the invention is through the design of multi-axis tools on the tool holder and the transmission of offset motor to achieve normal stone chamfering function while the suitable tool selection and replacement can be rapidly completed by rotating the tool holder in facing different operation requirements, thus avoiding too much man hours spending on the tool replacement and the numerous troubles and inconveniences to purchase additional multiple tools for carry and storage separately. In general, it is an excellent and outstanding innovated design which has very good application and useful values to the industry. Therefore, the lawfully patent application is intended.
