Knife clip for an actuatable safety locking knife

Abstract

The present invention provides a knife clip capable of executing a safety locking knife, which has two clamping bodies and a pin member for clamping a knife handle on a base. Each clamping body has a connecting portion and a claw portion. The two connecting portions are overlapped and connected to the base by a shaft member; the pin member is disposed on the base parallel to the shaft member, and penetrates through the connecting portions of the two clamping bodies at a position different from the shaft member. When the two clamping bodies are at the unlocking position of the pin member, the two clamping bodies can pivot relative to each other so that the knife handle can spread open the two claw portions and be taken away or returned; when the two clamping bodies are at the locking position of the pin member, the two clamping bodies will be restricted from pivoting relative to each other, and the knife handle is clamped and fixed by the two claw portions, and the safety function of locking the knife of the knife clip can be achieved by the movement of the pin member.

Description

Technical Field

[0001] The invention relates to a tool clamp for clamping a tool handle, in particular to a tool clamp capable of safely locking the tool. Background Art

[0002] In order to facilitate the smooth replacement of tools during the machining process of the machining center, a corresponding tool magazine is usually set up next to it. Common types of tool magazines include bamboo hat type, disc type, chain type and tool magazine type, so as to accommodate tools and plan processes for various types of machining. The tool magazine is mainly used to place tools of different machining types for the center tool to use alternately during the machining of the workpiece. It has become an indispensable and important accessory for the machining center, and the design and innovation trend of the tool magazine is no less than that of the machining center itself.

[0003] Common tool clamp structures, such as Taiwan Patent No. 240497, China, which is a tool clamping mechanism on a drum-type tool magazine, discloses that the two inner sides of the front edge of the pressure plate are against the push pin to support the push-out surface of the tool to ensure that the tool is not thrown out of the tool magazine due to the rapid rotation of the tool disc; another example is Taiwan Patent No. 324282, China, which is a clamping seat structure of a tool magazine in a cutting machine, which discloses that the reset component compressed at the ends of the two clamp arms releases elastic force, and rotates inward with the round rod as the axis, so that the two clamps are combined to clamp and position the neck of the milling tool; another example is Taiwan Patent No. I293907, China, which is a tool magazine tool disc clamping structure, which discloses that the chamber of the clamping part has a latch block, and each latch block can clamp and support the annular groove recessed on the periphery of the tool rod when the tool rod is loaded, so as to firmly hold the tool rod in the tool clamping seat.

[0004] However, although the common tool clamp structures mentioned above all have clamping structures for positioning the tool handle (such as the aforementioned ejector pin, reset assembly and latch block), they do not have a safety knife locking mechanism that can prevent the tool clamp from being accidentally opened. In actual use, the tool handle is often easily separated from the tool clamp and falls when subjected to external force. Therefore, how to solve this problem is the main focus of the present invention. Summary of the invention

[0005] To solve the above problem, the present invention provides a knife clamp capable of performing a safe knife locking function, so as to provide a safe knife locking mechanism to ensure that the knife handle can be removed or returned only when the knife clamp is in an unlocked state.

[0006] An embodiment of the present invention provides a knife clamp capable of safely locking a knife, which is attached to a base to clamp a knife handle. The knife clamp includes two clamp bodies and a pin, each clamp body has a connection portion and a claw portion, the two connection portions overlap and are pivotally connected to the base through an axis member, and the two claw portions open and close as the two connection portions pivot relative to each other; the pin member is arranged on the base in parallel with the axis member, and the pin member penetrates the two connection portions at positions different from the axis member, the pin member can be displaced along its axial direction and be located at an unlocked position or a locked position relative to the base, the two clamp bodies can pivot relative to each other when the pin member is in the unlocked position, and the knife handle can be taken away or returned by spreading the two claw portions; the two clamp bodies are restricted from pivoting relative to each other when the pin member is in the locked position, and the knife handle is clamped and fixed by the two claw portions.

[0007] Preferably, the two connecting parts each have a pin hole, the hole diameters of the pin holes are equal and are aligned when the two connecting parts are overlapped and are penetrated by the pin member, the pin member has a large diameter section and a small diameter section, the large diameter section has a width equal to the diameter of the pin hole, and the width of the small diameter section is smaller than the pin hole, and when the pin member is in the locked position, the large diameter section is in the two pin holes to limit the two clamps from pivoting relative to each other; when the pin member is in the unlocked position, the small diameter section is in at least one of the pin holes and there is a gap, so that the two clamps can pivot relative to each other.

[0008] Preferably, the base has a pin groove for accommodating the pin, and the pin is abutted against a reset elastic member in the pin groove. The pin is normally pushed by the reset elastic member and is located in the locked position, and when the pin is displaced to the unlocked position, the reset elastic member is compressed to generate a pre-force, so that the pre-force is used to reset the pin to the locked position.

[0009] Preferably, it further includes a positioning seat locked to the base and superimposed on the two connecting parts, the positioning seat has a through hole aligned with the pin hole, and the through hole and the small diameter section are of equal width, when the pin is located in the locked position, the large diameter section is located in the pin hole, and the small diameter section is located in the through hole and extends an exposed section, when the exposed section is pressed into the through hole, the pin moves from the locked position to the unlocked position.

[0010] Preferably, the pin has a slot located at the exposed section, and a roller is centrally disposed on the exposed section at the slot, so that the roller is pressed against the exposed section to be pressed into the through hole.

[0011] Preferably, the pin has a chamfer at the top of the exposed section, the chamfer is biased toward one side of the slot and is in an arc curve, and the roller is at the top of the pin and exposed on the side with the chamfer.

[0012] Preferably, one side of the pin member in the large-diameter section is recessed axially to form a flat surface. A stopper is disposed beside the pin slot on the base to align with the flat surface, so as to limit the pin member from deflecting when axially displaced relative to the base.

[0013] Preferably, a plurality of the tool holders are arranged side by side on the base.

[0014] Preferably, each of the clamping bodies has a reset elastic member abutted against its outer side. When at least one of the clamping bodies pivots outwards, the reset elastic member abutted against it is compressed, and the clamping body swings back to its original position as the reset elastic member rebounds.

[0015] Preferably, the reset elastic member can be disposed between any two of the tool holders, with both ends of the reset elastic member respectively abutted between the clamping bodies of adjacent tool holders; the reset elastic member can also have one end abutted against the clamping body of one tool holder and the other end abutted against a stopper provided on the base.

[0016] Thus, when the two clamping bodies are in the unlocking position of the pin member, the tool handle can open the two claw portions and be removed from or returned to the tool holder. However, when the two clamping bodies are in the locking position of the pin member, they are restricted from pivoting relative to each other. At this time, the two clamping bodies are restricted by the pin member so that the two claw portions cannot be opened, and even if a force is applied to the tool handle, the tool handle cannot be disengaged from the tool holder. Thus, as a safety locking mechanism for the tool, it can avoid the problem that the tool handle falls off the tool holder when an external force is applied. Description of the Drawings

[0017] Figure 1 It is a schematic view of the tool holder according to an embodiment of the present invention disposed on a drum-type tool magazine together with the base.

[0018] Figure 2 It is a three-dimensional external view of the tool holder according to an embodiment of the present invention disposed on the base.

[0019] Figure 3 It is Figure 2 An exploded configuration view of a tool holder on the base.

[0020] Figure 4 It is Figure 1 A partial schematic cross-sectional view of the tool holder as seen along the section line 4-4. At this time, the pin member is in the locking position.

[0021] Figure 5 It is Figure 1 A partial schematic cross-sectional view of the tool holder as seen along the section line 5-5.

[0022] Figure 6 It is a schematic view of the embodiment of the present invention when the spindle moves towards the tool holder to the position of taking the tool handle.

[0023] Figure 7 It isFigure 4 Schematic diagram of the pin member in

[0024] Figure 8 is Figure 5 Schematic diagram of the two clamping bodies in

[0025] Figure 9 Schematic diagram of the embodiment of the present invention when the main shaft brings the tool handle and returns to the tool holder. Detailed implementation manners

[0026] For the convenience of explaining the central idea expressed in the above Summary of the Invention section of the present invention, specific embodiments will be described first. In the embodiments, various different objects are depicted according to the ratios, dimensions, deformation amounts, or displacement amounts suitable for illustration, rather than being drawn according to the ratios of the actual components. This is hereby stated.

[0027] Please refer to Figures 1 to 9 As shown, the present invention provides a tool holder 100 capable of performing a safety locking knife, which is used to clamp a tool handle 300 on a base 200. In this embodiment, a plurality of tool holders 100 are arranged side by side on the base 200 (such as Figure 1 , 2 shown). The tool holder 100 mainly includes two clamping bodies 10 and a pin member 20, wherein:

[0028] Each clamping body 10 has a connecting portion 11 and a claw portion 12. The two connecting portions 11 are overlapped and pivotally connected to the base 200 through a shaft member 13. The two claw portions 12 open and close as the two connecting portions 11 pivot relative to each other. In this embodiment, the two clamping bodies 10 have the same structure, and the connecting portion 11 is a side plate that is thinner than the thickness of the clamping body 10 itself. The two clamping bodies 10 in this embodiment are arranged oppositely with the two connecting portions 11 overlapped (such as Figure 3 shown), so that the positions of the two claw portions 12 are symmetrical. In addition, both connecting portions 11 have a pin hole 111, the apertures of the two pin holes 111 are equal, and the two pin holes 111 are aligned when the two connecting portions 11 are overlapped.

[0029] The pin member 20 is arranged on the base 200, and when the pin member 20 is on the base 200, it is parallel to the shaft member 13, and the position of the pin member 20 on the base 200 is different from the position of the shaft member 13. The pin member 20 passes through the two overlapped and aligned pin holes 111, and the pin member 20 can be displaced axially and is located at an unlocking position P1 relative to the base 200 (such as Figure 7 , 8 shown) or a locking position P2 (such as Figure 4 , 5As shown. When the two clamping bodies 10 are in the unlocking position P1 of the pin 20, the two clamping bodies 10 can pivot relative to each other. When the tool handle 300 moves accordingly as engaged with the machining spindle, an external force can be applied to the two claw portions 12 to expand the two claw portions 12, so that the tool handle 300 can be removed from the tool holder 100, or the tool handle 300 can be returned to the tool holder 100. Also, when the two clamping bodies 10 are in the locking position P2 of the pin 20, the two clamping bodies 10 are restricted by the pin 20 and do not pivot relative to each other, and the tool handle 300 is then clamped and fixed by the two claw portions 12. The statement that the two clamping bodies 10 can pivot relative to each other includes that both of the two clamping bodies 10 can swing, or one clamping body 10 is stationary and the other clamping body 10 swings relative to it, and both are the forms in which the two clamping bodies 10 can pivot relative to each other referred to in the present invention.

[0030] In this embodiment, the pin 20 has a large-diameter section 21 and a small-diameter section 22. The large-diameter section 21 has a width approximately equal to the diameter of the two pin holes 111, and the width of the small-diameter section 22 is smaller than the two pin holes 111. When the pin 20 is in the locking position P2, the large-diameter section 21 restricts the two clamping bodies 10 from pivoting relative to each other in the two pin holes 111. When the pin 20 is in the unlocking position P1, the small-diameter section 22 is in at least one pin hole 111 and there is a gap G, and the gap G provides a space for the two clamping bodies 10 to pivot relative to each other.

[0031] Preferably, the base 200 has a pin groove 201 for accommodating the pin 20, and a return elastic member 23 is provided in the pin groove 201. In this embodiment, the return elastic member 23 is a compression spring. The pin 20 is abutted against the large-diameter section 21 by the return elastic member 23 in the pin groove 201. The pin 20 is normally pushed by the return elastic member 23 and is located in the locking position P2. When the pin 20 is displaced to the unlocking position P1, the return elastic member 23 is compressed to generate a preload. When the force for compressing the return elastic member 23 disappears, the preload is used to provide the pin 20 to return to the locking position P2.

[0032] In this embodiment, it further includes a positioning seat 30 locked to the base 200 (as shown in Figure 2 , 3 ), and the positioning seat 30 is stacked on the two connecting portions 11, and there is still a space for the two clamping bodies 10 to pivot movably between the positioning seat 30 and the base 200. Among them, the positioning seat 30 has a through hole 31. When the positioning seat 30 is locked to the base 200, the through hole 31 is aligned with the two pin holes 111, and the through hole 31 has the same width as the small-diameter section 22. When the pin 20 is in the locking position P2, the large-diameter section 21 is in the two pin holes 111, and the small-diameter section 22 is in the through hole 31, and the small-diameter section 22 extends a exposed section 221 outside the through hole 31. When this exposed section 221 is pressed into the through hole 31, the pin 20 is displaced from the locking position P2 to the unlocking position P1.

[0033] In this embodiment, on one side of the large-diameter section 21 of the pin member 20, there is a flat surface 24 (as shown in Figure 3 , 4 , and 5). This flat surface 24 is formed by concave in the large-diameter section 21 along the axial direction of the pin member 20. A stopper 40 is disposed beside the pin slot 201 on the base 200 to align with the flat surface 24. The stopper 40 is a cylinder in this embodiment, and the base 200 has a groove 202 for accommodating and positioning the stopper 40. When the pin member 20 axially displaces relative to the base 200, the stopper 40 restricts the pin member 20 from deflecting.

[0034] In the above embodiment, when the pin member 20 is in the unlocking position P1, the small-diameter section 22 has a clearance G in the pin hole 111 of the upper clamping body 10 (as shown in Figure 7 ). The swing amplitude of the upper clamping body 10 relative to the lower clamping body 10 is greater, but the present invention is not limited thereto. That is, the small-diameter section 22 may also have a clearance G in the pin holes 111 of both clamping bodies 10 (not shown in the figure), so that the two clamping bodies 10 have the same swing amplitude.

[0035] In this embodiment, the pin member 20 has a slot 222, and this slot 222 is located in the exposed section 221 of the pin member 20. A roller 25 is pivotally arranged in the slot 222 and located in the exposed section 221. And at the top of the exposed section 221 of the pin member 20 in this embodiment, there is a guide angle 223. This guide angle 223 is biased to one side of the slot 222 and is in an arc curve. The roller 25 is exposed on one side of the guide angle 223 at the top of the pin member 20, so that the exposed section 221 can be pressed into the through hole 31 when the roller 25 is pushed.

[0036] In this embodiment, each clamping body 10 has a reset elastic member 50 abutted against its outer side. The reset elastic member 50 is a compression spring in this embodiment. When the two clamping bodies 10 pivot relative to each other, the outward pivoting clamping body 10 compresses the reset elastic member 50 against which it abuts, and swings back to the reset position as the reset elastic member 50 rebounds. Here, the reset elastic member 50 can be arranged between any two tool holders 100, and its two ends respectively abut between the clamping bodies 10 of adjacent two tool holders 100; as shown in Figure 2 . The reset elastic member 50 can also be one end abutted against the clamping body 10 of one tool holder 100, and the other end abutted against a stopper 203 arranged on the base 200. There are three stoppers 203 on the base 200 in this embodiment. Two of them are arranged on the outer sides of the tool holders 100 at the two ends of the base 200, and another one is also arranged in the middle of the base 200. The reset elastic member 50 of this embodiment enables the clamping body 10 of the tool holder 100 to also reset after pivoting by means of the stopper 203.

[0037] When the tool holder 100 of the above embodiment is on the base 200 and is actually used, it is installed on a drum-type tool magazine 400 (asFigure 1 As shown in FIG. 1 , assuming that the tool holder 100 is in a state with the tool handle 300, and the tool handle 300 is to be removed from the tool holder 100, the processing spindle 500 engaged with the tool handle 300 can be moved, so that a pressing member 501 provided on the processing spindle 500 contacts the exposed section 221 and presses against the roller 25 (as shown in FIG. 1 ). Figure 6 , 7 As shown in FIG. 1 , the exposed section 221 is pressed into the through hole 31 and the pin 20 is located at the unlocking position P1. At this time, the gap G between the small diameter section 22 and the pin hole 111 causes the clamp 10 to pivot. The two claws 12 are opened, and the tool handle 300 can be removed from the tool holder 100 along with the movement of the machining spindle 500. If the tool handle 300 is to be returned to the tool holder 100, the machining spindle 500 brings the pressing member 501 along the chamfer 223 to contact the exposed section 221 and press against the roller 25 (as shown in FIG. 1 ). Figure 9 As shown), the exposed section 221 is pressed into the through hole 31 so that the pin 20 is located at the unlocking position P1, and the two claws 12 are opened. The tool handle 300 can then move with the machining spindle 500 and return to the tool holder 100.

[0038] In the above embodiment, when the knife holder 100 is returned or removed from the knife handle 300, the pin 20 is pushed by the reset elastic member 23 to the locked position P2, and the large diameter section 21 is used to restrict the two clamp bodies 10 from pivoting relative to each other in the two pin holes 111 with a diameter approximately equal to the width thereof. Therefore, if the knife holder 100 is provided with a knife handle 300, the knife handle 300 will be clamped and fixed by the two claws 12, and unless the pin 20 is moved to the unlocked position P1 again, the knife handle 300 will not be removed from the two claws 12, so as to ensure that the knife handle 300 is positioned on the knife holder 100.

[0039] From the above description, it is not difficult to find that the characteristic of the present invention is that the knife clamp 100 of the present invention provides a safe knife locking mechanism, that is, when the two clamp bodies 10 are in the unlocking position P1 when the pin 20 is in the unlocking position, the knife handle 300 can open the two claws 12, and thus the knife handle 300 can be removed from the knife clamp 100, or the knife handle 300 can be returned to the knife clamp 100. When the pin 20 is in the locking position P2, the two clamp bodies 10 are restricted from pivoting relative to each other, that is, the two clamp bodies 10 are restricted by the pin 20 so that the two claws 12 cannot be opened. Therefore, even if force is applied to the knife handle 300, the knife handle 300 cannot be separated from the knife clamp 100, thereby avoiding the problem of the knife handle 300 being separated from the knife clamp 100 and falling when subjected to external force.

[0040] The above embodiments are only used to illustrate the present invention, and are not used to limit the scope of the present invention. Any modifications or changes that do not violate the technical solution of the present invention belong to the scope of protection of the present invention.

[0041] Explanation of symbols:

[0042] 100: Tool holder. 200: Base.

[0043] 201: Pin slot. 202: Groove part.

[0044] 203: Stopper. 300: Tool shank.

[0045] 400: Rotary tool magazine. 500: Machining spindle.

[0046] 501: Pressing part. 10: Clamping body.

[0047] 11: Connecting part. 111: Pin hole.

[0048] 12: Claw part. 13: Shaft part.

[0049] 20: Pin part. 21: Large diameter section.

[0050] 22: Small diameter section. 221: Exposed section.

[0051] 222: Groove. 223: Chamfer.

[0052] 23: Return elastic part. 24: Cutting plane.

[0053] 25: Roller. 30: Positioning seat.

[0054] 31: Perforation. 40: Blocking part.

[0055] 50: Return elastic part. P1: Unlocking position.

[0056] P2: Locking position. G: Gap.

Claims

1. A knife clip for an executable safety lock knife, which is attached to a base for clamping a knife handle, and is characterized in that, The tool holder comprises: Two clamps, each having a connecting portion and a claw portion, the two connecting portions are overlapped and are pivotally connected to the base through a shaft member, the two claw portions open and close as the two connecting portions pivot relative to each other, the two connecting portions each having a pin hole, and the pin holes have the same diameter; and a pin, which is parallel to the shaft and arranged on the base, and the pin is provided with the two pin holes at a position different from the shaft and when the two connecting parts overlap, the pin has a large diameter section and a small diameter section, the large diameter section has a width equal to the diameter of the pin hole, and the small diameter section has a width smaller than the pin hole, and the pin can be displaced along its axial direction and located at an unlocked position or a locked position relative to the base; The base has a pin groove for accommodating the pin, and the pin is abutted against a reset elastic member in the pin groove. The pin is normally pushed by the reset elastic member to be located in the locked position, and when the pin moves to the unlocked position, the reset elastic member is compressed to generate a pre-force, so as to provide the pin with a reset to the locked position by the pre-force; A positioning seat is locked to the base and overlapped on the two connecting parts, the positioning seat has a through hole aligned with the pin hole, and the through hole and the small diameter section have the same width, when the pin is located at the locked position, the large diameter section is located in the pin hole, and the small diameter section is located in the through hole and extends an exposed section, when the exposed section is pressed into the through hole, the pin moves from the locked position to the unlocked position; and When the pin is located in the unlocking position, the two clamps have the small diameter section in at least one of the pin holes with a gap, so that the two clamps can pivot relative to each other, and the knife handle can open the two claws to be removed or returned; when the pin is located in the locking position, the two clamps have the large diameter section in the two pin holes to limit the two clamps from pivoting relative to each other, and the knife handle is clamped and fixed by the two claws.

2. The knife clip for an executable safety lock knife according to claim 1, characterized in that, The pin has a slot located at the exposed section, and a roller is centrally arranged at the exposed section at the slot, so that the exposed section is pressed into the through hole by the roller being pushed up.

3. The knife clip for an executable safety lock knife according to claim 2, characterized in that, The pin has a chamfer at the top of the exposed section, the chamfer is biased toward one side of the slot and is in an arc curve, and the roller is at the top of the pin and exposed on the side with the chamfer.

4. The knife clip for an executable safety lock knife according to claim 1, characterized in that, The pin is concave inwardly along the axial direction on one side of the large diameter section to form a cutting plane, and a stopper is arranged on the base beside the pin groove to align with the cutting plane, so that the stopper limits the pin from deflecting when it is displaced axially relative to the base.

5. The knife clip for an executable safety lock knife according to claim 1, characterized in that, The base has a plurality of tool holders arranged side by side.

6. The knife clip for an executable safety lock knife according to claim 5, characterized in that, Each of the clamping bodies has a restoring elastic member pressed against the outer side thereof. When at least one of the clamping bodies pivots outward, it compresses the restoring elastic member pressed against it, and swings back to restore itself as the restoring elastic member pressed against it rebounds.

7. The knife clip for an executable safety lock knife according to claim 6, characterized in that, The reset elastic member can be arranged between any two of the tool holders, and both ends of the reset elastic member respectively abut between the clamping bodies of two adjacent tool holders; the reset elastic member can also have one end abutting against the clamping body of one tool holder and the other end abutting against a stop block arranged on the base.

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