TW202140190A - Automatic tool changer capable of preventing and suppressing cutting water from entering into the body shell - Google Patents

Abstract

The present invention provides an automatic tool changer for preventing and suppressing cutting water from entering into the body shell. An output shaft (2) provided with the change arm (3) at the front end thereof is the automatic tool changer (1) that moves forward and backward from the guide cylinder of the body shell (11). An oil seal (51) is disposed on the guide cylinder. The length of the guide cylinder is set by preventing a cutting water contact portion (2A) used as the most advanced portion of the output shaft (2) and the front end portion protruded from the guide cylinder from entering the side closer to the body shell (11) than the oil seal (51) while the output shaft (2) is at the mostly retreated position.

Description

Automatic tool changer

The present invention relates to an automatic tool changer (ATC: Automatic Tool Changer) that is arranged in a machine tool such as a machining center and changes tools in an automatic manner.

The automatic tool changing device makes the output shaft mounted with the change arm move forward and backward in the axial direction or rotate around the axis, thereby holding and opening the tool at a predetermined timing. Automatic tool change. Among such automatic tool changing devices, a cam type, a hydraulic type, a motor type, etc. are known. For example, a cam type is used to replace tools in the following manner (for example, refer to Patent Document 1).

That is, as shown in FIGS. 6 and 7, the cam shaft 102 that has been arranged in the body case 101 is provided with a shift cam 103 and a turning cam ) (Not shown), a worm gear meshing with a worm shaft 104 is formed on the outer periphery of the displacement cam 103, and a cam groove is formed on the plate surface of the displacement cam 103. The base end side of a lever 105 is installed in the cam groove system, and the front end side of the lever 105 is a shift groove 110 a installed in the output shaft 110. In addition, a replacement arm 111 is arranged at the front end of the output shaft 110, and both ends of the replacement arm 111 are provided with gripping parts for holding a tool holder.

Then, when the worm shaft 104 rotates, the cam shaft 102 will rotate, and the front end of the lever 105 will move up and down along with the rotation of the displacement cam 103, and the output shaft 110 will move forward and backward in the axial direction (reciprocating motion). In addition, the output shaft 110 is provided with a cam follower that meshes with the revolving cam. When the revolving cam rotates, the output shaft 110 rotates around the shaft center and rotates the replacement arm 111. [Prior Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Application Publication No. 2009-39823

[The problem to be solved by the invention]

However, machine tools such as machining centers are predicted to progress towards fully automated and 24-hour operation in the future. Following this, it can be predicted that cutting water will be used for high-pressure cleaning to remove the chips that are currently performed manually. In other words, because it is unknown where the chips will adhere, a method of spraying cutting water from multiple locations in various directions to remove the chips can be considered. However, the automatic tool changing device 100 sucks in the jetted cutting water and accumulates the cutting water in the automatic tool changing device 100. There is a fear that the deterioration of lubricating oil containing the cutting water may cause damage to the various parts in the automatic tool changing device 100. There is a risk of adverse effects such as rust or abrasion.

That is, in the state where the output shaft 110 has been most retracted, as shown in FIG. 6, the front end side of the output shaft 110 will pass from the open end (gauge line) of the guide cylinder 101a of the main body housing 101. )) P1 is exposed to the outside and becomes the cutting water contact portion 110A exposed to the atmosphere and cutting water. On the other hand, in a state where the output shaft 110 has advanced to the forward end P2, as shown in FIG. 7, the cutting water contact portion 110A of the output shaft 110 is between the opening end P1 and the cutting water contact portion 110A The mixed contact portion 110B of the alloy will be exposed to the atmosphere and cutting water. That is, the cutting water contact portion 110A is always exposed to the atmosphere and cutting water, the mixed contact portion 110B is exposed to the lubricating oil in the body casing 101 or exposed to the atmosphere and cutting water, and the lubricating oil contact portion 110C as the other part is exposed Always exposed to the lubricating oil in the body shell 101.

Then, as the mixing contact portion 110B moves forward and backward from the main body casing 101, the cutting water that has adhered to the mixing contact portion 110B is sucked into the main body casing 101. That is, although an oil seal 106 is provided on the open end P1 side of the guide cylinder 101a, as shown in FIG. 8, as the output shaft 110 moves forward and backward, the seal lip of the oil seal 106 ) The gap between 106a and the output shaft 110 generates a pumping force F, and the cutting water that has adhered to the mixing contact portion 110B will be sucked into the body casing 101.

In order to prevent such inhalation of cutting water, although packing can be considered to be provided on the guide cylinder 101a, this will not only remove (scrape) the cutting water but also the lubricating oil, which will cause the inside of the main body casing 101 to be removed. The lubricating oil is reduced and becomes insufficient lubrication. In addition, although only a dust seal (dust seal) is provided on the guide cylinder 101a, the cutting chips can be removed, but cutting water and lubricating oil enter the main body casing 101.

Therefore, the object of the present invention is to provide an automatic tool changing device capable of preventing and suppressing the penetration of cutting water into the housing of the main body. [Means to solve the problem]

In order to achieve the above-mentioned object, the automatic tool changing device of the invention described in claim 1 is for the output shaft with the replacement arm installed at the front end to move forward and backward from the guide tube of the main body shell, and is characterized in that: the guide tube is provided with an oil seal ; As the cutting water contact portion of the output shaft that is the most advanced and protruding from the front end of the guide cylinder, the guide is set so that it does not enter the oil seal on the side of the body shell when the output shaft has most retracted The length of the tube.

The invention described in claim 2 is the automatic tool changing device described in claim 1, wherein, in a state where the output shaft has been most retracted, the grip portion of the tool holder is located at a predetermined position on the side of the body housing Way to form the aforementioned replacement arm.

The invention according to claim 3 is the automatic tool changing device according to claim 1, wherein the changing arm is formed by extending substantially straight in the horizontal direction.

The invention according to claim 4 is the automatic tool changing device according to any one of claims 1 to 3, wherein the dust seal for removing chips is provided on the free end side of the oil seal of the guide cylinder. [Effects of the invention]

According to the invention described in claim 1, the length of the guide tube (the position of the oil seal) is set so that the cutting water contact portion does not enter the side of the main body shell than the oil seal when the output shaft is most retracted, so that it can prevent , Prevent the cutting water from entering the body shell. That is, although the most advanced part of the output shaft and protruding from the guide cylinder (cutting water contact portion) is exposed to the atmosphere and cutting water, even if the output shaft is the most retracted, it does not enter the side of the main body housing than the oil seal. Therefore, it is possible to prevent and suppress the cutting water that has adhered to the cutting water contact portion of the output shaft from entering the body casing (inside the oil seal).

According to the invention described in claim 2, the replacement arm is formed in such a manner that the grip portion is located at a predetermined position in a state where the output shaft has most retracted. Therefore, for example, by setting the predetermined position to the same position as the conventional grip, it is possible to install the automatic tool changing device at the same position with respect to the gauge line. In other words, even if the guide cylinder is longer than the conventional one, the existing automatic tool changing device and the automatic tool changing device can be easily replaced. In addition, since the grip portion is located on the body shell side, the center of gravity of the replacement arm is located on the body shell side, and the rigidity and stability of the automatic tool changing device can be improved.

According to the invention described in claim 3, since the exchange arm is formed to extend substantially straight in the horizontal direction, the structure is simple, lightweight, and cost-effective, and the conventional exchange arm that extends substantially straight can be used.

According to the invention described in claim 4, since the dust seal for removing chips is provided on the free end side of the oil seal of the guide cylinder, it is possible to prevent chips from intruding into the body casing (inside the oil seal).

Hereinafter, the present invention will be explained based on the illustrated embodiment.

[Embodiment 1] Fig. 1 is a schematic configuration diagram showing the state where the output shaft 2 of the automatic tool changing device 1 of this embodiment has been most retracted (schematic front view), and Fig. 2 shows the state where the output shaft 2 of the automatic tool changing device 1 has been most advanced For the sake of ease of observation, the schematic configuration diagram of the diagram is shown only with a part of hatching (hatching). The automatic tool changing device 1 refers to a device for forward and backward movement and reciprocating movement from the inlet and outlet (guide cylinder) 11a of the main body housing 11 on the output shaft 2 of the replacement arm 3 that has been installed at the front end. The structure of the replacement arm 3 is the same as The conventional automatic tool changer is different, and although the detailed description of the equivalent configuration is omitted, it is outlined as follows. Here, in this embodiment, a description will be given of the case of a vertical type in which the output shaft 2 is arranged to extend in the vertical direction.

In the main body casing 11, a freely rotatable camshaft 12 is provided, and the camshaft 12 is provided with a displacement cam 13 and a revolving cam (not shown). In addition, a worm gear 13 a is formed on the outer periphery of the displacement cam 13, and the worm gear 13 a meshes with the worm shaft 14. Then, when the worm shaft 14 is driven by the motor 14A, its driving force will be transmitted to the displacement cam 13, and the cam shaft 12 and the orbiting cam will rotate.

An annular cam groove is formed on the plate surface of the displacement cam 13, and the cam curve as the annular profile of the cam groove is set in such a way that the output shaft 2 moves forward and backward at a predetermined timing. In this cam groove, the base end side cam follower of the lever 15 is slidable, and the front end side cam follower 15a of the lever 15 is installed in the displacement groove 2a of the output shaft 2. Then, when the displacement cam 13 rotates, the base end side cam follower will slide along the cam groove, and the front end side cam follower 15a will move up and down. Along with this vertical movement, the output shaft 2 reciprocates (forward and backward movement) in the vertical direction.

In addition, the output shaft 2 is provided with a turning ring (turning ring) 21 meshing with the turning cam. When the turning cam rotates, the output shaft 2 rotates through the turning ring 21. In this way, the output shaft 2 and the replacement arm 3 will reciprocate in the axial direction and rotate around the axis.

The replacement arm 3 extends substantially orthogonal to the output shaft 2 and is mounted on the output shaft 2 with a central portion, and is on the front end side of two rod-shaped arm bodies 31 extending opposite from the central portion, as shown in FIG. 3 As shown, a gripping portion 3a for gripping the tool holder H is provided. Although the shape or the holding structure of the holding portion 3a may be arbitrary, for example, it is formed in an arc shape, and the two ends of the exchange arm 3 are provided with lock pins 3b capable of advancing and retreating. Then, as the lock pin 3b advances to the grip portion 3a side, the grip portion 3a and the lock pin 3b clamp and hold the tool holder H, and when the lock pin 3b retreats from the grip portion 3a, The grip of tool holder H will be released. The structure of the central part of the exchange arm 3 will be described later.

In contrast to such a basic structure, as shown in FIG. 1, a retainer seal (guide tube) 4 is provided at the open end and the free end of the entrance 11a. The retainer seal 4 is attached to the conventional port 11a and forms a guide cylinder together with the port 11a. It is a cylindrical tube into which the output shaft 2 can be inserted. It is arranged coaxially with the port 11a, and its length is set to be proportional to the output The stroke length D3 of the shaft 2 is slightly longer to prevent the cutting water that has adhered to the cutting water contact portion 2A described later from always entering the oil seal 51 on the side of the main body housing 11 reliably.

Specifically, a ring-shaped outer flange portion 41 is provided. The ring-shaped outer flange portion 41 has a substantially cylindrical shape with an inner diameter slightly larger than the outer shape of the output shaft 2 and is located between the outer flange portion 41 and the output shaft 2. A predetermined space is formed and expands outward at the upper end and one end. On the other hand, on the open end (lower end) side of the port 11a which is the interface with the retainer seal 4, a ring-shaped concave oil seal pocket 11b connected to the inner hole is formed. An oil seal 51 is accommodated in the oil seal cavity 11b. Then, the outer flange portion 41 is sandwiched by the ring-shaped pressure plate 52 and the opening end surface of the port 11a, and the retainer bolt 53 is fastened to the port 11a from the pressure plate 52, and the retainer is sealed 4 will be connected to the open end of the entrance 11a. In this installed state, the oil seal 51 is clamped by the oil seal recess 11 b and the outer flange portion 41 of the retainer seal 4. Here, the oil seal 51 refers to an annular seal that prevents the lubricating oil in the main body shell 11 from leaking out or foreign matter intruding into the main body shell 11.

On the other hand, on the lower end side and the other end side of the retainer seal 4, an annular inner flange portion 42 protruding toward the output shaft 2 side is provided. The inner flange portion 42 is formed with a ring-shaped concave dust seal recess 42a connected to the inner hole of the retainer seal 4, and a dust seal 54 is accommodated in the dust seal recess 42a. In other words, a dust seal 54 is provided on the free end side of the oil seal 51 of the guide cylinder. The dust seal 54 refers to a ring-shaped seal that removes chips or dust that have adhered to the front end side of the output shaft 2 to prevent the chips from intruding into the retainer seal 4 and the body casing 11.

The front end side of the output shaft 2 protrudes from such a retainer seal 4, and a replacement arm 3 is attached to the protruding portion. Then, as shown in FIG. 1, in a state where the output shaft 2 has most retracted to the main body casing 11 side, the grip portion 3 a is located at a predetermined position on the main body casing 11 side, and the exchange arm 3 is formed.

That is, in the center portion of the exchange arm 3, a holder accommodating portion 32 that is substantially cylindrical and extends coaxially with the holder seal 4 and capable of accommodating the holder seal 4 is formed. The lower end side of the holder accommodating portion 32 On the one end side, a ring-shaped mounting portion 33 protruding toward the output shaft 2 side is provided. Then, in a state where the inner peripheral surface of the mounting portion 33 is in contact with the output shaft 2, the holder accommodating portion 32, that is, the replacement arm 3 is mounted on the front end of the output shaft 2 by the accommodating bolt 34.

On the upper end side and the other end of such a holder accommodating portion 32, two arm bodies 31 are arranged facing each other so as to extend in a straight line when viewed from the front and from above. That is, in this embodiment, on the upper end side of the retainer accommodating portion 32, a mounting portion 35 extending horizontally and protruding to face each other is formed, and a mounting hole 35a is formed from the free end surface of the mounting portion 35 . Then, by attaching the base end portion of the arm body 31 to the attaching hole 35a, the arm body 31 can be detachably attached to the holder accommodating portion 32. In such an installation state, the two arm bodies 31 extend substantially orthogonally to the output shaft 2. Here, in this embodiment, although the two arm bodies 31 and the holder accommodating portion 32 are different entities, both the two arm bodies 31 can be integrally formed, or the two arm bodies 31 and the holder can be integrally formed.器住部32。 Device storage section 32.

In addition, between the holder accommodating portion 32 and the mounting portion 35, a plurality of cylindrical stopper pins 36 extending parallel to the output shaft 2 are arranged around the axis of the holder accommodating portion 32. The stop pin 36 protrudes toward the main body housing 11 side than the arm main body 31 and the mounting portion 35, and can abut against the pressure plate 52 when the output shaft 2 has most retracted to the main body casing 11 side, and prevents the arm main body 31 and other damages. In this way, in this embodiment, when the output shaft 2 has been most retracted, the reference point (upper end) of the replacement arm 3 will coincide with the gauge line P1.

Here, the arrangement position and height of the arm body 31 and the holding portion 3a (the length of the holder receiving portion 32) are based on the point in time when the output shaft 2 has most retracted, the holding portion 3a is the same as the conventional and known The grip portion of the automatic tool changing device 100 is located at the same position (predetermined position), and the distance from the gauge line P1 is set in the same way as the conventional one. That is, the gauge line distance D1 from the gauge line P1, which is the reference surface of the main shaft end face of the machine tool, to the center line P0 of the camshaft 12, is set to the same size as the conventional distance shown in FIG. 6 In the case of, the arrangement position and height of the grip 3a are set so that the distance between the grip 3a and the gauge line P1 is the same as the conventional distance. In other words, even if the camshaft 12 is installed on the same center line P0 as the conventional one, the tool holder H can be appropriately held and opened in the same gauge line P1 as the conventional one. In this way, in the exchange arm 3 of this embodiment, the two arm main bodies 31 can be positioned on the side of the main body housing 11 than the center part of the front end of the output shaft 2 is installed, and the grip portion 3a can be positioned on the side of the gauge line P1. Established location.

On the other hand, when the output shaft 2 is most advanced to the side of the anti-body housing 11, as shown in FIG. 2, the replacement arm 3 will advance only by the stroke length D3 from the gauge line P1, and the front end surface P2 of the output shaft 2 will also only advance. Stroke length D3. In this state, although the part (cutting water contact part 2A) on the front end side of the output shaft 2 protruding from the retainer seal 4 is exposed to the atmosphere and cutting water, it is the lubricating oil contact part on the inlet and outlet 11a side of the other part 2B, but it is contained and protected by the retainer seal 4 from being exposed to cutting water. Then, when the output shaft 2 is most retracted again, as shown in FIG. 1, the cutting water contact portion 2A is accommodated in the retainer seal 4 and the retainer accommodating portion 32 without entering the body casing 11 (inside the oil seal 51) ), the lubricating oil contact portion 2B is accommodated in the main body casing 11.

In this way, the cutting water contact portion 2A of the output shaft 2 is always exposed to the atmosphere or cutting water, and the lubricating oil contact portion 2B is always exposed to the lubricating oil or the atmosphere. Here, the dimension D2 in FIGS. 2 and 7 refers to the distance from the lower end surface of the main body casing 11 to the gauge line P1.

According to the automatic tool changing device 1 configured in this way, the length of the guide cylinder (oil seal 51 Location). In other words, since the retainer seal 4 is connected to the inlet and outlet 11a, it is possible to prevent and suppress the penetration of cutting water into the main body casing 11. That is, although the cutting water contact portion 2A, which is the part where the output shaft 2 moves forward most and protrudes from the retainer seal 4, is exposed to the atmosphere and cutting water, even if the output shaft 2 moves backward, it will still be located in the retainer seal 4. And it does not enter into the side of the main body shell 11 more than the oil seal 51, that is, the inlet and outlet 11a. Therefore, it is possible to prevent and suppress the cutting water that has adhered to the cutting water contact portion 2A of the output shaft 2 from entering the body casing 11 (inside the oil seal 51). As a result, even with advances in full automation, etc., and cutting water has been sprayed in all directions, it is still possible to prevent and suppress the deterioration of lubricating oil containing cutting water from adversely affecting various parts.

In addition, the exchange arm 3 is formed so that the grip portion 3a is located at a predetermined position in a state where the output shaft 2 has most retracted. Therefore, as described above, by setting the predetermined position to the same position as the conventional grip, the automatic tool changing device 1 can be arranged at the same position relative to the gauge line P1 as the conventional one. In other words, even if the retainer seal 4 is provided and the guide cylinder is longer than the conventional one, the existing automatic tool changing device 100 and the automatic tool changing device 1 can be easily replaced. Furthermore, since the grip portion 3a is located on the main body housing 11 side, the center of gravity of the replacement arm 3 is located on the main body housing 11 side (camshaft 12 side), and the rigidity and stability of the automatic tool changer 1 can be improved.

In addition, since the dust seal 54 for removing chips and the like is the retainer seal 4 provided on the free end side of the oil seal 51 of the guide tube, it is possible to prevent chips and the like from entering the body casing 11 (inside the oil seal 51).

[Embodiment 2] Fig. 4 is a schematic configuration diagram (schematic front view) showing the state where the output shaft 2 of the automatic tool changing device 10 of this embodiment has been most retracted, and Fig. 5 shows the state where the output shaft 2 of the automatic tool changing device 10 has been most advanced For the sake of ease of observation, the schematic configuration diagram is shown only with a part of the section line attached. In this embodiment, the shape and structure of the replacement arm 3 are different from those of the first embodiment, and the same configuration as that of the first embodiment will be omitted by adding the same reference numerals.

Here, in this embodiment, as shown in FIG. 4, the outer flange portion 41 of the retainer seal 4 is mounted on the opening end surface of the port 11a without being sandwiched by the pressurizing plate 52, and is located in the retainer seal 4 A pressure plate 52 is installed on the lower end surface. Then, a dust seal 54 is accommodated in the dust seal cavity 52 a of the pressure plate 52. In this way, as in the first embodiment, the pressure plate 52 constitutes a part of the retainer seal 4.

The exchange arm 3 in this embodiment has the same structure as the exchange arm 111 of the conventional and existing automatic tool exchange device 100, and is formed to extend substantially straight in the horizontal direction. That is, in the substantially disc-shaped central portion 37 that has been mounted to the front end of the output shaft 2, there is formed a mounting portion 35 that extends horizontally and protrudes and opposes each other, and is mounted on the mounting hole 35a of the mounting portion 35 There is the base end of the arm body 31. In such an installed state, the two arm bodies 31 extend substantially orthogonally to the output shaft 2, and the central portion 37 and the two arm bodies 31 extend substantially straight in a straight line when viewed from the front and above.

Here, in this embodiment, compared to the first embodiment and the prior art, the reference point P3 of the replacement arm 3 is set so that only the stroke length D3 (=D4) is located below (the side of the body housing 11) The length of the retainer seal 4. Therefore, in the state where the output shaft 2 has most retracted, as shown in FIG. 4, the reference point P3 of the exchange arm 3 is located at a position separated downward from the gauge line P1 of the first embodiment by the stroke length D3. Therefore, in order to appropriately hold and hold the release tool holder H on the same gauge line P1 as in the first embodiment, it is necessary to install the automatic tool changer 10 only with the stroke length D3 (=D4) on the upper side. In addition, when the retainer seal 4 has been formed to be longer, it is necessary to install the automatic tool changing device 10 further above only by the amount of extension.

On the other hand, when the output shaft 2 moves forward most, as shown in FIG. 5, the exchange arm 3 moves forward by the stroke length D3 from the reference point P3. In this state, although the part (cutting water contact part 2A) on the front end side of the output shaft 2 protruding from the retainer seal 4 is exposed to the atmosphere and cutting water, the other part of the lubricating oil contact part 2B is exposed to The retainer seal 4 is contained and protected from being exposed to cutting water. Then, when the output shaft 2 is most retracted again, as shown in FIG. 4, the cutting water contact portion 2A is contained in the retainer seal 4 and does not enter the body casing 11 (inside the oil seal 51), the lubricant contact portion 2B is housed in the main body shell 11.

In this way, according to this embodiment, as in the first embodiment, since the cutting water contact portion 2A of the output shaft 2 is always exposed to the atmosphere or cutting water (not exposed to lubricating oil), the lubricating oil contact portion 2B is always exposed to lubrication. Oil or atmosphere (not exposed to cutting water), so it is possible to prevent and suppress the penetration of cutting water into the main body casing 11. In addition, since the exchange arm 3 is formed to extend substantially straight in the horizontal direction, the structure is simple, can be reduced in weight and cost, and the conventional exchange arm 111 that extends substantially straight can be used. Therefore, as long as the holder seal 4 is installed in the conventional and known automatic tool changing device 100 and the output shaft 2 is lengthened, the automatic tool changing device 10 can be easily constructed.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-mentioned embodiment. Even if there are design changes that do not deviate from the scope of the present invention, it is still covered by the present invention. For example, in the above-mentioned embodiment, although the guide cylinder is constituted by different individual inlets and outlets 11a and the holder seal 4, the guide cylinder may be integrally formed. That is, the length of the guide tube may be set so that the cutting water contact portion 2A does not enter the oil seal 51 on the side of the main body housing 11 even when the output shaft 2 is most retracted. Therefore, the guide cylinder as the conventional port 11a is extended by the stroke length D3 or more, and the oil seal 51 is provided so that the cutting water contact portion 2A does not enter the oil seal 51 closer to the main body housing 11 than the oil seal 51 even when the output shaft 2 is most retracted. , This part is still covered by the present invention.

In addition, although the description has been given for the case of the vertical type automatic tool changing device, it is of course also applicable to the horizontal type automatic tool changing device in which the output shaft 2 extends substantially horizontally. Similarly, although the cam type automatic tool changing device has been described, it can of course also be applied to a hydraulic type or a motor type.

1,10,100: automatic tool changer 2,110: output shaft 2a, 110a: displacement groove 2A, 110A: Cutting water contact part 2B, 110C: Lubricating oil contact part 3,111: Replace the arm 3a: Grip 3b: Locking pin 4: Retainer seal (guide cylinder) 11, 101: body shell 11a, 101a: entrance and exit (guide cylinder) 11b: Oil seal cavity 12,102: Camshaft 13,103: Displacement cam 13a: worm gear 14,104: Worm shaft 14A: Motor 15,105: Leverage 15a: Cam follower on the front side 21: Swing ring 31: Arm body 32: Retainer accommodating part 33: Installation Department 34: Containment bolts 35: Installation Department 35a: mounting hole 36: stop pin 37: Central 41: Outer flange 42: Inside flange 42a, 52a: Dust-proof seal cavity 51,106: oil seal 52: pressure plate 53: Bolt for retainer 54: Dust seal 106a: sealing lip 110B: Mixed contact part D1: Gauge line distance D2: size D3, D4: stroke length F: Pump force H: Tool rack P0: Centerline P1: Open end (gauge line) P2: Front face (Picture 1) P2: Forward end (Figure 7)

[Fig. 1] is a schematic configuration diagram showing the state where the output shaft of the automatic tool changing device according to the first embodiment of the present invention has been most retracted. [Fig. 2] is a schematic configuration diagram showing the state where the output shaft of the automatic tool changing device of Fig. 1 has advanced most. [FIG. 3] A plan view showing the periphery of the grip portion of the changing arm of the automatic tool changing device of FIG. 1. [FIG. [Fig. 4] is a schematic configuration diagram showing a state where the output shaft of the automatic tool changing device according to the second embodiment of the present invention has been most retracted. [Fig. 5] is a schematic configuration diagram showing the state where the output shaft of the automatic tool changing device of Fig. 4 has advanced most. [Figure 6] is a schematic configuration diagram showing the state where the output shaft of the conventional automatic tool changer has most retracted. [Fig. 7] is a schematic configuration diagram showing the state where the output shaft of the automatic tool changing device of Fig. 6 has advanced most. [Fig. 8] A schematic diagram showing the positional relationship between the oil seal and the output shaft of the automatic tool changing device of Fig. 6 (a), and an enlarged view of part A (b) thereof.

1: Automatic tool changing device

2: output shaft

2a: Displacement groove

2A: Cutting water contact part

2B: Lubricating oil contact part

3: Replace the arm

4: Retainer seal (guide cylinder)

11: body shell

11a: Entrance and exit (guide cylinder)

11b: Oil seal cavity

12: Camshaft

13: Displacement cam

13a: worm gear

14: Worm shaft

14A: Motor

15: Leverage

15a: Cam follower on the front side

21: Swing ring

31: Arm body

32: Retainer accommodating part

33: Installation Department

34: Containment bolts

35: Installation Department

35a: mounting hole

36: stop pin

41: Outer flange

42: Inside flange

42a: Dust-proof sealing cavity

51: oil seal

52: pressure plate

53: Bolt for retainer

54: Dust seal

D1: Gauge line distance

P0: Centerline

P1: Open end (gauge line)

P2: Front face

Claims (4)

An automatic tool changing device is an automatic tool changing device for the output shaft of the front end of the changing arm to move forward and backward from the guide cylinder of the body shell, which is characterized by: An oil seal is provided on the aforementioned guide cylinder; The guide cylinder is set so that the cutting water contact portion, which is the most advanced part of the output shaft and protrudes from the front end of the guide cylinder, does not enter the oil seal on the side of the main body housing when the output shaft is most retracted. The length. The automatic tool changing device of claim 1, wherein the changing arm is formed in such a way that the gripping portion of the tool holder is located at a predetermined position on the side of the body shell when the output shaft is most retracted. According to the automatic tool changing device of claim 1, wherein the changing arm is formed by extending substantially straight in the horizontal direction. The automatic tool changing device according to any one of claims 1 to 3, wherein the dust-proof seal for removing chips is provided on the free end side of the oil seal of the guide cylinder.

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