TWI737263B - Tool sleeve structure for tool magazine of machine tool - Google Patents

Abstract

A knife cover structure for a tool magazine of a machine tool, comprising a knife cover and a knife lock unit, wherein the knife cover is used to store the knife bar, and the knife lock unit is integrated in the knife cover to align the knife bar inserted in the knife cover The end of the blade generates radial force and axial force, so that the tool holder can be more stably inserted in the tool holder. Another unlocking unit can provide thrust to offset the axial force in time to release the restriction of the knife lock unit on the tool holder, so that the knife The rod can easily exit the knife holder.

Description

Tool sleeve structure for tool magazine of machine tool

The present invention is related to the storage of tools of a machine tool; in particular, it refers to a tool holder structure used for a tool magazine of a machine tool.

Press, the tool magazine system of the machine tool is a device that provides tool storage and tool change requirements in the automated machining process. Common tool magazine systems include disc-type tool magazines or chain-type tool magazines. The aforementioned tool magazines are all equipped There are many tool sleeves for inserting tools of different specifications. In order to stabilize the tool holder and prevent the tool holder from loosening improperly from the tool holder and causing damage to the tool holder or tool, the known tool holder structure is provided with a latch structure inside the tool holder for correct insertion of the tool holder. One end of the arbor sleeve acts to produce the card abuts against improper release the arbor, the engaging structure may be found in Taiwan Patent No. I426978 'of the magazine slide carrier holder packing means "patents, Taiwan Patent The new patent No. M477934 "Knife Holder Device" discloses that a plurality of radial holes are provided in the middle and rear sections of the knife holder, and each radial hole is provided with a steel ball and a spring. The spring installation method provides the steel ball The radial force is used to force the steel ball to press against the knife rod and insert one end of the knife sleeve. It is true that the aforementioned structure can limit the position of the knife bar, but it seems that the knife bar only relies on the spring to provide radial elasticity to maintain stability. Moreover, the existing latch structure usually uses a spring with a larger material to increase the tightness of the steel ball. The force against the knife bar ensures that the knife bar can be firmly inserted in the knife holder. However, when we want to take the knife bar from the knife holder, we need to apply a greater pulling force to overcome the elastic force of the spring. Not only does it increase the difficulty of taking the knife, but it also hides the problem of improper control of the knife taking force and hurting the staff.

To solve the missing, the present applicant has made "Arbor machine tool unlock the lock-cum-structure" Taiwan Patent No. M586190 model patents on file, the patented technology can improve the stability of the arbor and planted with easily withdraw the arbor Effect. However, the applicant is based on the spirit of excellence and hopes to provide more choices to the industry, and then provides different structural designs on the basis of similar principles, so the present invention is born.

In view of this, the object of the present invention is to provide a tool holder structure for a tool magazine of a machine tool, which has the effect of improving the stability of the tool bar after it is inserted and having the effect of easily withdrawing the tool bar.

In order to achieve the above object, the present invention provides a tool holder structure for a tool magazine of a machine tool, which includes a tool holder and a knife lock unit. Wherein, the knife sleeve has a knife containing space, and defines an axis passing through the center of the knife containing space, the knife rod enters and exits the knife containing space along the axis; the knife locking unit includes a shaft tube, a tightening piece, a movable ring and a top Pushing member; wherein the shaft tube is fixed to the sleeve, the shaft tube has a shaft hole and the tube wall has at least one through hole communicating with the shaft hole, the axis passes through the center of the shaft hole; the tightening member is accommodated in the shaft tube In the through hole; the movable ring is sleeved on the shaft tube and can move between a first position and a second position; the pushing member provides a force to the movable ring to maintain the movable ring to the first position move.

The effect of the present invention is that when the movable ring is located at the first position, the pressing member resists the end of the knife bar to restrict the knife bar from exiting the knife containing space; when the movable ring is located at the second position, the The pressing member fails to resist the end of the knife bar, so that the knife bar can exit the knife-accommodating space.

In order to explain the present invention more clearly, a preferred embodiment is given in conjunction with the drawings in detail as follows. Please refer to Figures 1 to 6, which are a preferred embodiment of the tool holder structure 100 for a tool magazine of a machine tool of the present invention, which is suitable for but not limited to disc type tool magazines. The tool holder structure 100 has The effect of stabilizing the knife bar 200 so that the knife bar 200 is not easily detached from the knife sleeve 100. The aforementioned tool bar 200 is composed of a shaft 201, a neck 202, and an end 203 connected in sequence. One end of the shaft 201 can be fixed to the tool (not shown), and the outer diameter of the end 203 is larger than the outer diameter of the neck 202. As shown in FIGS. 8 to 10, the end portion 203 has a front pushing surface 203a, an outer ring surface 203b, and a rear inclined surface 203c. The front pushing surface 203a and the rear inclined surface 203c are located on both sides of the outer ring surface 203b and are inclined.

The knife cover structure 100 of this embodiment includes a knife cover 10 and a knife lock unit 20. Wherein, the knife sleeve 10 is a hollow cylinder with openings at both ends and a conical hole inside to form the knife containing space 12. Here, an axis L passes through the center of the knife containing space 12, and the knife bar 200 is along the axis L enters and exits the knife containing space 12; in addition, as shown in FIG. 6, the knife sleeve 10 is further provided with a plurality of screw holes 14 around the knife containing space 12.

The knife locking unit 20 is integrated in the knife sleeve 10 to restrict the knife rod 200 from exiting the knife sleeve 10. As shown in FIG. 2, the aforementioned knife lock unit 20 includes a shaft tube 21, a movable ring 22, a bolt 23, a tightening piece, a pushing piece and other components, which are described below.

The shaft tube 21 has a shaft hole 21a, and the tube wall of the shaft tube 21 has a plurality of through holes 21b communicating with the shaft hole 21a; There is an embedding groove 21d at the front of 21c, and the other end of the shaft tube 21 is connected to a retaining wall 24 having an outer diameter larger than that of the shaft tube 21, and a plurality of perforations 24a are provided on the retaining wall 24.

The movable ring 22 is sleeved on the shaft tube 21 and can move between a first position P1 shown in Fig. 8 and a second position P2 shown in Fig. 9, please cooperate with Figs. 3(A) and 3( As shown in B), the front side 22A of the movable ring 22 has a guide surface 22a arranged obliquely on the periphery, and the middle part of the front side 22A has a concave portion composed of an inner ring surface 22b and an abutting surface 22c , The inner ring surface 22b extends horizontally, the pushing surface 22c is connected to the inner ring surface 22b and is arranged obliquely, the rear side 22B of the movable ring 22 is provided with a plurality of blind holes 22d; in addition, the movable ring 22 There are notches 22e on the periphery that are equivalent to the number of perforations 24a of the retaining wall 24 to facilitate the passage of bolts 23 for assembly, and the bolts 23 are then locked into the screw holes 14 of the cutter sleeve 10 after passing through the perforations 24a on the retaining wall 24 , The head of the bolt 23 abuts against the retaining wall 24 to fasten the shaft tube 21 to the sleeve 10, and the axis L passes through the center of the shaft hole 21a.

It is also noted that the above-mentioned movable ring 22 is preferably sleeved on the shaft tube 21 in a manner that cannot rotate relative to the shaft tube 21. In one embodiment, a guide pin 25 is used to pass through the movable ring 22 and be fixed to the shaft tube 21. The blocking wall 24 is used to achieve the purpose of the previous disclosure. In this embodiment, the method of achieving the purpose of the front disclosure is to provide a positioning hole 24b on the blocking wall 24, a through hole 22f on the movable ring 22, and a guide pin 25. Use a spring pin whose outer diameter is equivalent to the hole diameter of the positioning hole 24b but smaller than the hole diameter of the through hole 22f. It is tightened in the positioning hole 24b under tension, but has a gap with the hole wall of the through hole 22f so that the movable ring 22 can be sleeved on the shaft tube in a manner that does not rotate relative to the shaft tube 21 but can move back and forth on the shaft tube 21 21 on.

The pressing member is round steel balls 26, the number of which is equivalent to the number of through holes 21b on the tube wall of the shaft tube 21, and the diameter of the steel balls 26 is greater than between the outer wall of the shaft tube 21 and the inner ring surface 22b of the movable ring 22 Therefore, when the steel balls 26 are respectively accommodated in a corresponding through hole 21b, the steel balls 26 will be limited by the inner ring surface 22b of the movable ring 22 and will not escape from the through hole 21b.

The pushing member is a spring 27 whose number is equivalent to the number of blind holes 22d of the movable ring 22. The springs 27 are respectively arranged in a corresponding blind hole 22d. One end of the spring 27 abuts against the bottom surface of the blind hole 22d, and the other end Resist against the surface of the retaining wall 24. The spring 27 uses the retaining wall 24 as a fixed fulcrum to provide a pushing force to the movable ring 22. The pushing surface 22c of the movable ring 22 will push the steel ball 26 to force a part of the steel ball 26 to protrude from the shaft hole. 21a, and the steel ball 26 at this time also restricts the movable ring 22 from sliding out. The movable ring 22 in this state is defined here at the first position P1, and the pushing force of the spring 27 drives the movable ring 22 to stay there. The first position P1 moves.

The above is the structure description of the knife cover of the knife cover structure of the present invention and the knife lock unit. Please refer to the schematic diagrams of the installation action of the knife bar 200 shown in FIGS. 8 to 10, where FIG. 8 reveals that the movable ring 22 is pushed by the spring 27 to maintain the first position P1, and the knife bar 200 is inserted into the knife holder along the axis L 10, and the front pushing surface 203a of the end 203 of the tool bar 200 contacts the part of the steel balls 26 protruding from the shaft hole 21a. Next, the advancing tool bar 200 uses the forward pushing surface 203a of its end 203 to guide the steel ball 26 to move outward, that is, to move in the direction of the movable ring 22. When the steel ball 26 moves outward, it is restricted only by the through hole 21b. It can move in the radial direction, and because the pushing surface 22c of the movable ring 22 is a slope, the steel ball 26 moving outwards will push the movable ring 22 to the direction of the retaining wall 24, while compressing the spring 27, as shown in Figure 9 It is shown that when the steel ball 26 contacts the outer ring surface 203b of the end 203, it means that the movable ring 22 retreats to the second position P2. When the knife bar 200 is pushed forward roughly, the steel ball 26 corresponds to the neck 202, because there is a gap between the outer peripheral surface of the neck 202 and the shaft hole 21a of the shaft tube 21, so that the spring 27 can move when the compressed and stored energy is released. The ring 22 is pushed outward, and the pushing surface 22c of the movable ring 22 pushes the steel ball 26 to settle until the steel ball 26 abuts the pushing surface 22c of the movable ring 22 and the rear inclined surface 203c of the end 203 at the same time (refer to Figure 10 ), the movable ring 22 stops at the first position P1 again, and the steel ball 26 resists the end 203 of the knife bar 200 to restrict the knife bar 200 from exiting the knife containing space 12. The aforementioned spring 27 pushes the movable ring 22, and the movable ring 22 pushes the steel ball 26 with the inclined thrust surface 22c, and generates a radial force (vertical component force) and the shaft to the end 203 of the tool bar 200 through the steel ball 26. The direction force (horizontal force component) achieves the purpose of improving the stability of the tool bar 200 inserted in the tool sleeve 10 without arbitrarily loosening and exiting the tool containing space 12.

The above is a structural description of an embodiment of the present invention for restricting the exit of the knife bar from the knife holder. On the basis of the knife holder 10 and the knife locking unit 20, the knife holder structure of the present invention may further include an unlocking unit. It is used to be manipulated to generate a thrust on the movable ring 22 to force the movable ring 22 to retreat from the first position P1 to the second position P2, thereby releasing the restriction on the knife bar 200 by the knife lock unit 20, so that the knife bar 200 can be easily Exit the knife sleeve 10. The structure and operation of the unlocking unit are described below.

Please cooperate with FIG. 5 and FIG. 11, the unlocking unit 30 of this embodiment includes two ejector rods 32. The knife sleeve 10 cooperates with the two ejector rods 32 and is provided with two insertion holes 16 on the top surface to communicate with the knife holder. In the space 12, the projection range of the aforementioned insertion hole 16 covers a part of the structure of the movable ring 22 at the first position P1. Please cooperate with FIG. 12 again. When the two ejector rods 32 are manipulated to move synchronously and pass through the insertion hole 16 with a slightly tapered end, as the ejector rod 32 moves downward, the ejector rod 32 will push the guide rod 32 downward. The pushing surface 22a pushes the movable ring 22 to retreat from the first position P1 to the second position P2, that is, the movable ring 22 moves to the retaining wall 24 and compresses the spring 27. At this moment, the steel ball 26 is no longer guided by the movable ring 22. Because there is still a distance D between the outer wall of the shaft tube 21 and the inner ring surface 22b of the movable ring 22, the steel ball 26 can move freely in the through hole 21b, that is, the lock knife unit 20 is released. With regard to the restricted state of the end 203 of the knife bar 200, we can easily take out the knife bar 200 from the knife sleeve 10 so far. When the knife bar 200 is separated from the knife holder 10 and the ejector rod 32 is manipulated to exit the knife holder 10, the knife lock unit 20 returns to the state shown in FIG. 6. The movement of the aforementioned ejector rod 32 can be achieved by controlling the change of air pressure or hydraulic pressure to drive the ejector rod 32 to move up and down. It is also noted that the number of the aforementioned ejector rod 32 is two, but it can also be used in other embodiments. A single ejector 32 completes the action of releasing the restriction of the knife bar 200 by the knife lock unit 20.

It should be noted that the above-mentioned unlocking unit 30 may further include a retaining ring 34 and a C-shaped buckle 36. As shown in FIG. On the abutting surface 21c, the C-shaped buckle 36 is combined in the insertion groove 21d to fix the position of the blocking ring 34, so that the movable ring 22 is located between the blocking wall 24 and the blocking ring 34. The position of the aforementioned baffle ring 34 is fixed, and its installation position provides a back-to-back support for the ejector rod 32 when the ejector rod 32 is inserted into the knife holder 10 downwards, that is, when the ejector rod 32 pushes the movable ring 22, the baffle ring 34 is opposed to The ejector rod 32 provides a reaction force to counteract the improper bending of the ejector rod 32 caused by the pushing force of the spring 27.

In the above embodiment, the spring 27 is arranged in the blind hole 22d of the movable ring 22, and one end of the spring 27 is pressed against the bottom surface of the blind hole 22d, and the other end is pressed against the surface of the retaining wall 24. However, in other embodiments, the blind hole may be Is it installed on the retaining wall 24, or is provided with blind holes on both the retaining wall 24 and the movable ring 22, the purpose of which is to stabilize the spring 27 to avoid loosening.

The above are only the preferred and feasible embodiments of the present invention. Any equivalent changes made by applying the specification of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

[this invention] 100: Knife cover structure 10: Knife set 12: Knife space 14: screw hole 16: Insert hole 20: Lock knife unit 21: Shaft tube 21a: Shaft hole 21b: Through hole 21c: abutment surface 21d: Insert groove 22: Activity ring 22A: Front side 22B: rear side 22a: Derivative surface 22b: inner ring surface 22c: Push noodles 22d: blind hole 22e: gap 22f: Through hole 23: Bolt 24: Block the Wall 24a: perforation 24b: positioning hole 25: guide pin 26: Steel Ball 27: Spring 30: Unlock the unit 32: ejector 34: retaining ring 36: C buckle D: The distance between the outer wall of the shaft tube and the inner ring surface of the movable ring L: axis P1: first position P2: second position 200: Toolholder 201: Shaft 202: neck 203: End 203a: Forward noodle 203b: Outer ring surface 203c: rear slope

Fig. 1 is a perspective view of a tool holder structure and a tool bar for a tool magazine of a machine tool according to a preferred embodiment of the present invention; 2 is an exploded view of the knife lock unit in the knife cover structure of the above preferred embodiment of the present invention; Figures 3(A) and 3(B) are perspective views of the movable ring of the knife lock unit shown in Figure 2 from different perspectives; 4 is a top view of the knife cover structure of the above-mentioned preferred embodiment of the present invention; Figure 5 is a cross-sectional view along the line 5-5 of Figure 4; Figure 6 is a cross-sectional view along the line 6-6 of Figure 5; Figure 7 is a partial enlarged view of the part marked A in Figure 6; Figures 8 to 10 are cross-sectional views showing the process of inserting the knife bar into the knife sleeve, wherein Figure 8 discloses that the movable ring of the knife lock unit is located at the first position, and Figure 9 discloses that the movable ring of the knife lock unit is located at the second position; Figure 11 is a perspective view, revealing that the knife bar is inserted into the knife holder and the ejector rod of the unlocking unit is inserted into the knife holder; Fig. 12 is a cross-sectional view along the line 12-12 in Fig. 11;

100: Knife cover structure

10: Knife set

20: Lock knife unit

34: retaining ring

200: Toolholder

201: Shaft

202: neck

203: End

L: axis

Claims (8)

A tool holder structure for a tool magazine of a machine tool is used to house a tool bar with one end. The tool holder structure includes: a tool holder with a tool containing space and defining an axis passing through the center of the tool containing space, The knife rod enters and exits the knife containing space along the axis; a knife lock unit includes a shaft tube, at least one tightening member, a movable ring and at least one pusher; wherein the shaft tube is fixedly connected to the knife sleeve and the The shaft tube is fixed, the shaft tube has a shaft hole and the tube wall has at least one through hole communicating with the shaft hole, and the axis passes through the center of the shaft hole; the pressing member is a steel ball accommodated in the through hole of the shaft tube; The movable ring is sleeved on the shaft tube and can move between a first position and a second position. The movable ring has an inner ring surface and an abutting surface, and the abutting surface is connected to the inner ring surface and is formed Obliquely arranged, the distance between the outer wall of the shaft tube and the inner ring surface of the movable ring is smaller than the diameter of the steel ball; the pusher provides a force on the movable ring to keep the movable ring moving toward the first position ; With this, when the movable ring is located in the first position, the urging member resists the end of the knife bar and restricts the knife bar from exiting the knife-accommodating space; when the movable ring is located in the second position, the The pressing member fails to resist the end of the knife bar, so that the knife bar can exit the knife-accommodating space. According to claim 1, the tool holder structure for the tool magazine of a machine tool, wherein one end of the shaft tube is connected to a retaining wall, the pushing member is a spring, one end of the spring abuts the retaining wall, and the other end of the spring abuts the movable ring. According to claim 2, the tool holder structure for the tool magazine of a machine tool, wherein at least one of the retaining wall and the movable ring has at least one blind hole, and one end of the spring abuts against the bottom surface of the blind hole. According to claim 1, the tool holder structure for a tool magazine of a machine tool, wherein the movable ring is sleeved on the shaft tube in a manner that cannot rotate relative to the shaft tube. According to claim 4, the tool holder structure for the tool magazine of a machine tool, wherein the knife lock unit includes a guide pin, one end of the shaft tube is connected with a retaining wall, the movable ring has a through hole, and the guide pin passes through the guide pin. The through hole is connected to the retaining wall at one end. According to claim 5, the tool holder structure for the tool magazine of a machine tool, wherein the retaining wall has a positioning hole, the guide pin is a spring pin and its outer diameter is smaller than the aperture of the through hole of the movable ring, the spring pin Insert one end into the positioning hole. The tool holder structure for a tool magazine of a machine tool according to any one of claims 1 to 6, comprising an unlocking unit; wherein the tool holder has at least one insertion hole communicating with the tool containing space, and the movable ring has an oblique direction A guide surface is provided, and the unlocking unit includes at least one ejector rod. The ejector rod is manipulated to move and inserts into the insertion hole and pushes the guide surface to push the movable ring to the second position. According to claim 7, the tool holder structure for the tool magazine of the machine tool, wherein the knife lock unit includes a retaining ring, the retaining ring is arranged at the other end of the shaft tube, and the movable ring is located between the retaining wall and the retaining ring. Between the rings; wherein, when the mandrel is inserted into the insertion hole and contacts the baffle ring, the baffle ring provides a reaction force to the mandrel.

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