JP5802485B2 - Coolant nozzle bi-directional operation structure - Google Patents

Description

  The present invention relates to a coolant nozzle bi-directional operation structure that can be suitably used, for example, when supplying a grinding fluid or coolant to a workpiece or tool during operation of a machine tool.

  For example, a mechanism of a coolant nozzle that supplies grinding fluid or coolant fluid to a workpiece or tool during operation of a machine tool is known (see Patent Document 1). The configuration of the coolant nozzle mechanism includes a coolant nozzle that injects coolant liquid, a rotating shaft that changes the direction of the coolant nozzle, a motor that supplies power for rotating the rotating shaft, and a flow path section that supplies the coolant liquid to the coolant nozzle. And a coolant liquid is supplied.

JP 60-255349 A

  In the above-described coolant nozzle mechanism, the direction of the coolant nozzle that supplies grinding fluid or coolant (hereinafter collectively referred to as “grinding fluid”) to a workpiece or tool using a single motor is rotated in one axial direction. It can be changed by. However, such a coolant nozzle mechanism capable of rotating only in one axial direction is not sufficient to cope with machine tools having various forms, and the grinding fluid is placed at an appropriate position of a workpiece or tool having various forms. It becomes difficult to supply.

  Therefore, a coolant nozzle mechanism 100 as shown in FIG. 4 can be considered. The coolant nozzle mechanism 100 includes a first motor 110, a nozzle support 130 attached to a rotating shaft 111 that rotates via the first motor 110, and a coolant nozzle 150 that is supported by the nozzle support 130. Have. A second motor 120 is provided at the base end of the coolant nozzle 150.

  The nozzle support 130 includes a coolant nozzle 150 that extends in a direction perpendicular to the axis of the rotation shaft 111 of the first motor 110 and has a nozzle tip 151 bent at a certain angle. Then, the first motor 110 is rotated by, for example, about 180 ° to change the direction of the coolant nozzle itself from the state shown in FIG. 4A to FIG. 4C, or the second motor 120 is rotated by about 180 °. The direction of the nozzle tip 151 of the coolant nozzle 150 is changed from the state shown in FIG. According to the coolant nozzle mechanism 100 having such a configuration, unlike the coolant nozzle mechanism described in Patent Document 1, the coolant nozzle 150 can be operated in two directions (biaxial directions) as shown in FIG. Therefore, the degree of freedom in the direction of supplying the grinding fluid can be increased.

  However, since the coolant nozzle 150, the nozzle support 130, and the second motor 120 are supported on the rotating shaft 111 of the first motor 110, the inertia weight when the first motor 110 is rotationally driven is very large. Become. Therefore, a large-sized motor is required to increase the output of the first motor 110, which increases the cost. Further, since the second motor 120 is arranged so as to be deviated with respect to the axis of the first rotating shaft 111, an undesirable bending moment is applied to the rotating shaft of the first motor 110 due to the weight of the second motor 120. Will always occur, and the shaft support portion of the rotating shaft 111 of the first motor 110 may be easily damaged. 4A and 4B, when a grinding fluid is to be supplied from the right side of the second motor 120, a passage for supplying the grinding fluid is passed through the inside of the second motor 120. It becomes a complicated mechanism to change the arrangement of the second motor 120, and the design becomes difficult.

  An object of the present invention is to provide a coolant nozzle bi-directional operation structure that can supply a grinding fluid or a coolant in two directions (biaxial directions) with a simple configuration and can be used for a long period of time.

In order to solve the above-described problem, the coolant nozzle bi-directional operation structure according to claim 1 of the present invention includes:
A coolant nozzle bi-directional operation structure that supplies grinding fluid and coolant fluid to workpieces and tools of machine tools,
A base part;
A first motor and a second motor arranged on the base portion at a predetermined interval in a state where the respective rotation shafts are opposed to each other;
A first bevel gear provided on the rotating shaft of the first motor;
A second bevel gear provided on the rotating shaft of the second motor;
A third bevel gear meshing perpendicularly to the first bevel gear and the second bevel gear;
A bracket that holds a nozzle shaft that is a rotation shaft of the third bevel gear, and that maintains a meshing state of the third bevel gear with the first bevel gear and the second bevel gear;
A coolant nozzle connected to the nozzle shaft of the third bevel gear and configured to direct the grinding fluid injection port in a predetermined angular direction with respect to the rotation axis of the third bevel gear;
Equipped with a,
The nozzle shaft protrudes on the opposite side to the meshing portion of the third bevel gear .

  Further, since the nozzle, the nozzle support and the second motor are not supported on the rotating shaft of the first motor as in the prior art, the inertia weight to be driven by the first motor does not increase. Therefore, it is not necessary to use a large motor, which contributes to cost reduction.

  Further, since the same type of motor can be used for the first motor and the second motor, parts can be shared and the cost is not increased. Further, since the overall structure is simple, the design becomes easy.

  According to the present invention, it is possible to provide a coolant nozzle two-way operation structure that can supply grinding fluid and coolant in two directions (biaxial directions) with a simple configuration and that can be used for a long period of time.

It is a front view which shows the coolant nozzle two-way operation structure which concerns on this embodiment. It is a front view for operation | movement explanation of the coolant nozzle two-way operation structure which concerns on this embodiment, and is a figure which shows the state which located the coolant nozzle in the upper side in the figure, and made the nozzle front-end | tip face the left side in the figure (FIG. It is a figure (FIG.2 (b)) which shows the state which located the coolant nozzle in the upper side in the figure, and made the nozzle front-end | tip face the right side in the figure. FIG. 3 is a side view for explaining the operation of the coolant nozzle two-way operation structure according to the present embodiment, and shows a state in which the coolant nozzle is positioned on the upper side in the drawing and the nozzle tip is directed on the left side in the drawing (FIG. 3 ( It is a figure (FIG.3 (b)) which shows the state which positioned the nozzle tip to the lower side in the figure by positioning a coolant nozzle to the side in the figure. It is a front view which shows the operation | movement structure of the conventional coolant nozzle.

  Hereinafter, a coolant nozzle two-way operation structure according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a coolant nozzle two-way operation structure according to the present embodiment.

  The coolant nozzle bi-directional operation structure according to the present embodiment is used, for example, in a coolant nozzle mechanism that supplies a grinding fluid or a coolant fluid (hereinafter referred to as “grinding fluid”) to a workpiece or a tool during operation of a machine tool. And a first motor 21 (20) and a first motor 21 (20) and a first motor 21 (20) and a first motor 21 (20) and a first motor 21 (20) and a first motor 21 (20) and a first motor 21 (20) arranged on the base plate so as to face each other with a predetermined interval on the same axis. Two motors 22 (20), first to third bevel gears 31, 32, 33 (30) disposed between the first motor 21 and the second motor 22, and first to third bevel gears 30. A nozzle shaft 35 protruding in the direction of the central axis of the third bevel gear 33, and a coolant nozzle 50 provided at the tip of the nozzle shaft 35.

  In this embodiment, the base plate 10 has an elongated rectangular shape made of a metal plate material having a certain thickness.

  In the present embodiment, stepping motors are used for the first motor 21 and the second motor 22. The first motor 21 and the second motor 22 are the same stepping motor.

  A first bevel gear 31 is fixed to the tip of the output shaft 21 a of the first motor 21, and a second bevel gear 32 is fixed to the tip of the output shaft of the second motor 22. The first bevel gear 31 and the second bevel gear 32 have the same pitch and the same number of teeth, and are arranged on the same rotational axis at a predetermined interval so that the gears face each other. The third bevel gear 33 meshes with both the first bevel gear 31 and the second bevel gear 32. The third bevel gear 33 is disposed between the first bevel gear 31 and the second bevel gear 32 so that the axis thereof is orthogonal to the axes of the first bevel gear 31 and the second bevel gear 32. In the case of the present embodiment, the number of teeth and the pitch of the third bevel gear 33 are the same as the number of teeth and the pitch of the first and second bevel gears 31 and 32. Accordingly, the gear ratio between the third bevel gear 33 and the first bevel gear 31 and the gear ratio between the third bevel gear 33 and the second bevel gear 32 are 1 in this embodiment.

  In the case of this embodiment, the bracket 40 has a shape obtained by bending an elongated metal plate into a square U-shape when viewed from the front in FIG. An insertion hole 41 a for inserting the output shaft 21 a of the first motor 21 is formed in the first bent portion 41 of the bracket 40. Similarly, an insertion hole 42 a for inserting the output shaft 22 a of the second motor 22 is formed in the second bent portion 42 of the bracket 40. In addition, a cylindrical projecting portion 45 projecting in the direction opposite to the third bevel gear 33 is formed in the central portion 43 sandwiched between the first bent portion 41 and the second bent portion 42 of the bracket 40. ing. The axis of the cylindrical protrusion 45 coincides with the axis of the nozzle shaft 35. Further, the nozzle shaft insertion hole 45 a formed in the axial direction of the cylindrical projecting portion 45 is formed so as to penetrate the central portion of the bracket 40. The inner diameter of the nozzle shaft insertion hole 45a is slightly larger than the outer diameter of the nozzle shaft 35, and the nozzle shaft 35 is rotatably held by the protrusion 45.

  The protrusion 45 supports the nozzle shaft 35 and follows the movement of the nozzle shaft 35 around the axis of the first and second bevel gears 31, 32 so that the bracket 40 moves between the first and second bevel gears 31, 32. The axis is moved with a locus on an arc around the axis.

  In the nozzle body 51, a grinding fluid supply channel 53 that is coaxial with the nozzle body 51 is formed. Further, a hose (not shown here) for supplying the grinding fluid from the grinding fluid supply source to the coolant nozzle 50 is connected to the end face of the base end portion of the nozzle body 51. This hose has sufficient flexibility so as not to restrict the biaxial movement of the coolant nozzle 50.

  There is a certain gap between the outer peripheral surface of the output shaft 21a of the first motor 21 and the inner peripheral surface of the first insertion hole 41a of the bracket 40, and in this embodiment, the bearings 91 can rotate relative to each other. At the same time, the bracket 40 is supported by the output shaft 21 a of the first motor 21 via the bearing 91. Similarly, there is a certain gap between the outer peripheral surface of the output shaft 22a of the second motor 22 and the inner peripheral surface of the second insertion hole 42a of the bracket 40. In this embodiment, the bearings 92 rotate relative to each other. The bracket 40 is supported by the output shaft 22 a of the second motor 22 through the bearing 92. Instead of the bearings 91 and 92, an O-ring may be provided in the gap of this portion.

  There is a certain gap between the third bevel gear 33 and the central portion of the bracket 40, and the meshing between the third bevel gear 33 and the first and second bevel gears 31 and 32 is maintained, and The third bevel gear 33 can be rotated without the side surface opposite to the gear of the third bevel gear 33 interfering with the central portion 43 of the bracket 40.

  Next, a specific operation method of the coolant nozzle 1 will be described. FIG. 2 is a front view for explaining the operation of the coolant nozzle two-way operation structure according to the present embodiment, and shows a state in which the coolant nozzle is positioned on the upper side in the drawing and the nozzle tip is directed on the left side in the drawing. (FIG. 2A), and a view (FIG. 2B) showing a state in which the coolant nozzle is positioned on the upper side in the drawing and the tip of the nozzle is directed to the right side in the drawing. FIG. 3 is a side view for explaining the operation of the coolant nozzle bi-directional operation structure according to the present embodiment, and shows a state in which the coolant nozzle is positioned on the upper side and the nozzle tip is directed to the left side in the drawing. FIG. 3 is a view (FIG. 3A) and a view (FIG. 3B) showing a state in which the coolant nozzle is positioned on the side in the drawing and the nozzle tip is directed downward in the drawing.

  For example, the output shaft 21a of the first motor 21 and the first bevel gear 31 are rotated by 90 ° at a predetermined angular velocity clockwise as viewed from the gear side of the first bevel gear 31 based on the state of FIG. When the output shaft 22a of the second motor 22 and the second bevel gear 32 are rotated by 90 ° clockwise at the same predetermined angular velocity as the first motor 21 when viewed from the gear side of the second bevel gear 32, The third bevel gear 33 rotates by 90 ° counterclockwise when viewed from the gear side of the third bevel gear 33. Thus, when the third bevel gear 33 is rotated by 90 °, the nozzle shaft 35 is rotated accordingly, and the coolant nozzle 50 changes the direction of the nozzle tip from the state shown in FIG. 1 to the state shown in FIG. . Further, the output shaft 21a of the first motor 21 and the first bevel gear 31 are rotated counterclockwise by 90 ° at a predetermined angular velocity when viewed from the gear side of the first bevel gear 31 with reference to the state of FIG. When the output shaft 22a of the second motor 22 and the second bevel gear 32 are rotated counterclockwise by 90 ° at the same predetermined angular velocity as the first motor 21 as viewed from the gear side of the second bevel gear 32. The third bevel gear 33 rotates 90 ° clockwise as viewed from the gear side of the third bevel gear 33. Thus, when the third bevel gear 33 rotates by 90 °, the nozzle shaft 35 also rotates accordingly, and the coolant nozzle 50 changes the direction of the nozzle tip from the state shown in FIG. 1 to the state shown in FIG. .

  Further, the output shaft 21a of the first motor 21 and the first bevel gear 31 are rotated counterclockwise by 90 ° at a predetermined angular velocity when viewed from the gear side, and the second bevel gear 32 is viewed from the gear side. The first bevel gear 31, the output shaft 22a of the second motor 22, the second bevel gear 32, and the first bevel gear 31. 1 rotates at the same angular velocity by 90 ° counterclockwise when viewed from the right side in the state of FIG. 1, the third bevel gear 33 does not rotate while meshing with the first and second bevel gears 31, 32. The first bevel gear 31, the second bevel gear 32, and the third bevel gear 33 remain as viewed from the gear side of the first bevel gear 31 around the axis line formed by the first output shaft 21a and the second output shaft 22a. ° only rotate. Thus, when the first bevel gear 31 and the second bevel gear 32 and the nozzle shaft 35 integrated with the first bevel gear 31 are rotated by 90 °, the bracket 40 is also rotated in accordance with the movement of the nozzle shaft 35, The coolant nozzle 50 changes the direction of the nozzle tip from the state shown in FIG. 3A to the state shown in FIG.

  Then, the effect | action of the coolant nozzle two-way operation structure which concerns on this embodiment is demonstrated. Since the coolant nozzle bi-directional operation structure according to the present embodiment has the above-described configuration, it can be applied to machine tools having various forms in which the supply position and the supply method of the grinding fluid are individually different, and various forms. Grinding fluid can be supplied at a stable flow rate from the optimal direction to the optimal position at all times for workpieces and tools that have a gap.

  Further, since the nozzle, the nozzle support and the second motor are not supported on the rotating shaft of the first motor as in the prior art, the inertia weight to be driven by the first motor does not increase. Therefore, it is not necessary to use a large motor, which contributes to cost reduction.

  Further, unlike the conventional example, the second motor is not arranged to be deviated with respect to the axis of the first rotating shaft, so that an undesirable bending moment is applied to the rotating shaft of the first motor due to the weight of the motor. It does not occur, and damage to the shaft support portion of the rotary shaft of the first motor can be avoided.

  In the above-described embodiment, it has been described with reference to FIGS. 1 to 3 that it rotates by 90 ° around the nozzle shaft of the coolant nozzle and rotates by 90 ° around the output shaft of the first and second motors. However, it is not necessarily limited to this angle range.

  The motor used in the present invention is not limited to the stepping motor as in the above-described embodiment, and various motors such as a (brush, brushless) DC motor can be used. The pitch and the number of teeth of the first and second bevel gears and the third bevel gear may be different from those of the above-described embodiment as long as the pitch is the same.

  Specifically, if the gear pitch is the same and “the number of teeth of the first and second bevel gears> the number of teeth of the third bevel gear”, the first and second motors are rotated at a constant rotational speed. However, “the rotational angular velocity of the coolant nozzle around the output axis of the first and second motors <the rotational angular velocity of the coolant nozzle around the nozzle shaft”.

  On the other hand, if the gear pitch is the same and “the number of teeth of the first and second bevel gears <the number of teeth of the third bevel gear”, even if the first and second motors are rotated at a constant rotational speed, “Rotational angular velocity of the coolant nozzle around the output axis of the first and second motors> Rotational angular velocity of the coolant nozzle around the nozzle shaft”. Accordingly, by changing the number of teeth of the first and second bevel gears and the number of teeth of the third bevel gear, it is possible to cope with supply specifications of various grinding fluids and coolant fluids.

  The shapes, dimensions, numerical values, and materials of the components introduced in the above-described embodiments are merely examples, and various shapes, dimensions, numerical values, and materials can be selected as appropriate without departing from the scope of the present invention. Needless to say.

  In the present embodiment, the grinding fluid is supplied from the nozzle tip of the coolant nozzle to the workpiece or tool of the machine tool. However, the present invention is not necessarily limited to such a grinding fluid. The polishing liquid, the cooling liquid (coolant liquid), and the cooling oil (coolant oil) may be supplied from the tip of the coolant nozzle to the workpiece or tool of the machine tool.

DESCRIPTION OF SYMBOLS 1 Coolant nozzle two-way operation structure 10 Base plate 21, 22 (20) Motor 21a, 22a Output shaft 31, 32, 33 (30) Bevel gear 35 Nozzle shaft 40 Bracket 41 First bent part 45 Projection part 50 Coolant nozzle 51 Nozzle Body

Claims (1)

A coolant nozzle bi-directional operation structure that supplies grinding fluid and coolant fluid to workpieces and tools of machine tools,
A base part;
A first motor and a second motor arranged on the base portion at a predetermined interval in a state where the respective rotation shafts are opposed to each other;
A first bevel gear provided on the rotating shaft of the first motor;
A second bevel gear provided on the rotating shaft of the second motor;
A third bevel gear meshing perpendicularly to the first bevel gear and the second bevel gear;
A bracket that holds a nozzle shaft that is a rotation shaft of the third bevel gear, and that maintains a meshing state of the third bevel gear with the first bevel gear and the second bevel gear;
A coolant nozzle that is connected to the nozzle shaft of the third bevel gear and that directs the grinding fluid injection port in a predetermined angular direction with respect to the rotation axis of the third bevel gear;
Equipped with a,
The coolant nozzle bi-directional operation structure , wherein the nozzle shaft protrudes on the opposite side to the meshing portion of the third bevel gear .

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