JPH065085Y2 - Fluid supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a fluid supply device, and more particularly to improvement of a fluid supply device for supplying fluid from a fixed member side to a swivel member side.

“Prior Art” In a conventional fluid supply device, a fluid passage provided in a fixed member and a fluid passage provided in a swiveling member are connected by a pipe member made of a soft elastic body such as a rubber hose having redundancy. A fluid such as air, water, or oil is supplied from the fixed member side to the swivel member side by a pressure feeding means such as a pump.

[Problems to be Solved by the Invention] In the conventional fluid supply device as described above, when the swiveling member swivels in one direction, the pipe member is twisted, and when the swiveling member swivels in the opposite direction, the pipe member moves in the opposite direction. If the tube member is twisted and twisted in opposite directions repeatedly, the tube member is easily damaged.

The present invention has been made in view of the above problems, and an object thereof is to provide a fluid supply device capable of extending the life of a pipe member.

[Means for Solving the Problems] A fluid supply device according to the present invention for solving the above problems is a fluid supply device for supplying fluid from a fixed member side to a swivel member, wherein a fluid passage fixed to the fixed member A bearing member provided and a shaft member rotatably fitted in the bearing member and provided with a fluid passage, wherein the fluid passage of the bearing member and the fluid passage of the shaft member are fitted inside diameter portion of the bearing member. Alternatively, a distributor that communicates via an annular recess provided in the fitting outer diameter portion of the shaft member is provided in the fixed member,
The shaft member is connected to the swivel member by a rotation transmission member, and the fluid passage of the shaft member and the fluid passage of the swivel member are connected and communicated with each other by a pipe member which is a soft elastic body. To do.

[Operation] In the fluid supply device according to the present invention having the above-mentioned configuration, the bearing member of the distributor provided on the fixed member is provided with the fluid passage, and the fluid passage is connected to the fluid passage of the swivel member by the soft pipe member. It is in communication. The shaft member is
It is rotatably fitted to the distributor bearing member,
It is rotated by the rotation transmission member along with the turning of the turning member. Therefore, the tube member is not twisted. In the distributor, since the fluid passage of the bearing member and the fluid passage of the shaft member communicate with each other via the annular recess provided in the fitting inner diameter portion of the bearing member or the fitting outer diameter portion of the shaft member, the swiveling member The swirling angle of is not limited, and the fluid can be reliably supplied even if the swirling in the same direction is repeated.

[Embodiment] Next, as an embodiment of the present invention, a fluid supply device applied to a grinding machine for turning between a grinding wheel base and switching between outer diameter grinding and inner diameter grinding will be described.

FIG. 2 is a plan view of a grinding machine provided with the fluid supply device of the present invention, and FIG. 1 is a left side view showing the vicinity of the grindstone. Note that, in FIG. 1, for convenience, the piping duct 25 shown in FIG. 2 is shown as an arrow A view in FIG. 2.

A table 11 is guided on the bed 10 so as to be horizontally movable. Further, a feed table 12 is guided on the bed 10 so as to be movable in a direction orthogonal to the moving direction of the table 11, and a swivel base 13 as a swivel member is supported on the feed table 12 so as to be swivelable about a vertical axis Z. There is. The feed table 12 and the swivel base 13 make the grindstone base 14
Is configured. The table 11 is horizontally moved by the servomotor 15, and the feed table 12 is moved by the servomotor 16
Is horizontally moved by a ball screw 18, and the swivel base 13 is swung by a servomotor 17 through gear reduction means including a worm gear 19.

A headstock 20 is arranged on the table 11, and a workpiece W is attached by a chuck attached to a headstock 21 of the headstock 20.
Is gripped, and the work W is rotationally driven around an axis parallel to the moving direction of the table 11.

A grindstone shaft 22 is rotatably supported on the swivel base 13,
An external grinding stone Ga is detachably attached to one end of the grinding stone shaft 22, and the grinding stone shaft 22 is rotated by an external grinding stone drive motor 23. An internal grinding wheel drive motor 24 is attached to the rear end of the revolving base 13, and an internal grinding wheel Gb is detachably attached to the internal grinding wheel drive motor 24.

The pipe duct 25 serving as a fixing member fixed to the side surface of the bed 10 is made of a hollow member, extends upward, and then changes its direction in the horizontal direction to reach the upper portion of the grinding wheel base 13. Inside the piping duct 25, pipes 26 and 27 forming a fluid passage are arranged. The pipes 26 and 27 are connected to pumps 28 and 29.

The distributor 30 is provided at the end of the pipe duct 25. Since the pipe duct 25 is fixed to the bed 10, the position of the distributor 30 remains unchanged. The distributor 30 includes a bearing member 32 fixed to an end of the pipe duct 25 and a shaft member 42 rotatably fitted to the bearing member 32.

The bearing member 32 has a fitting hole 3 having a circular cross section, which is a fitting inner diameter portion.
3 and fluid passages 36 and 37 toward the center of the fitting hole 33
And have been drilled. Annular recesses 38 and 39 and an O-ring groove 40, which communicate with the fluid passages 36 and 37 respectively, are provided in the inner diameter portion of the fitting hole 33. Fluid passage 36,3
Pipes 26 and 27 are respectively connected to 7.

The shaft member 42 is provided with a fitting shaft portion 43 that is a fitting outer diameter portion and a flange portion 44. The shaft member 42 is rotatably assembled to the bearing member 32 by fitting the fitting shaft portion 43 into the fitting hole 33 of the bearing member 32. Fluid passages 46 and 47 are formed in the shaft member 42. The fluid passages 46 and 47 are provided in the fitting shaft portion 43 in the annular recess 3
6 and 37, respectively, and after facing the direction perpendicular to the axis, they change direction in the direction parallel to the axis and descend, and then change direction again in the flange portion 44 toward the outer diameter direction, and further to the axis. Turn to a parallel direction and reach the lower end surface of the flange. Rubber hoses 48 and 49, which are tube members, are connected to the fluid passages 46 and 47, respectively, on the lower end surface.

The rubber hoses 48 and 49 are provided on the swivel base 13 and are installed in the fluid path 5 of the mounting base 50 eccentrically provided with respect to the vertical axis Z.
2, 53 are connected. The fluid passages 52 and 53 are on the swivel base 1.
3 toward the bearing inside, and pump 2
The fluid pumped by 8, 29 is supplied.

A first universal joint 54 is connected to the center of the end surface of the flange portion 44 of the shaft member 42. The first universal joint 54 is connected to the expansion joint 55. The expansion joint 55 is connected to the second universal joint 56. The second universal joint 56 is connected to the mounting base 50. The first and second universal joints 54, 56 and the expansion joint 55 constitute a rotation transmission member 57. The positional relationship between the first universal joint 54 and the fluid passages 46 and 47 on the lower end surface of the flange portion 44 of the shaft member 42, and the second universal joint 56 and the fluid passages 52 and 53 on the upper end surface of the mounting base 50. The connection parts of the universal joints and the fluid passages are arranged so that the positional relationship is substantially the same when viewed from above the machine.

The rotation transmitting member 57 and the rubber hoses 48, 49 are covered with a flexible dust cover 58.

"Operation" The operation of the above configuration will be described.

When the swivel base 13 is driven by the servo motor 17, the rotation transmitting member 57 connected to the mounting base 50 causes the shaft member 4 to move.
2 is driven. Since the mount 50 is eccentric with respect to the vertical axis Z and the feed table 12 is horizontally moved by the servomotor 16, the distance between the mount 50 and the shaft member 42 changes, but this change in the distance causes expansion joints. It is absorbed by the expansion and contraction of 55 and the rubber hoses 48, 49. Since the mounting base 50 and the shaft member 42 are connected by the rotation transmission member 57, the relative movement between the two is only rocking and does not include a rotational component, so that the rubber hoses 48 and 49 are twisted. There is no.

In the distributor 30, the annular recess 38 prevents the fluid passage 3 from being affected by the rotation of the shaft member 42.
6 and the fluid passage 46, and the annular recess 39 keeps the fluid passage 37 and the fluid passage 47 in communication with each other.

In this way, the fluid pumped by the pumps 28, 29 is reliably supplied to the predetermined location without being affected by the operation of the swivel base 13.

"Other Embodiments" The present invention is not limited to the details of the above embodiments. For example, in the rotation transmission member, in addition to the combination of the universal joint and the expansion joint, a flexible shaft (a wire rod (Shaped) may be used.

Further, in the above-described embodiment, the annular recess is provided in the fitting inner diameter portion of the bearing member of the distributor, but the annular recess may be provided in the fitting outer diameter portion of the shaft member.

[Advantage of Invention] As described above, in the fluid supply device according to the present invention, the shaft member rotatably fitted to the bearing member of the distributor provided on the fixed member transmits the rotation as the turning member turns. The shaft member is rotated by a member, the shaft member is provided with a fluid passage, and the fluid passage is connected to and communicates with the fluid passage of the swivel member by a pipe member that is a soft elastic body. Since it does not occur, there is an effect that the life can be extended.

Further, since the fluid passage of the bearing member of the distributor and the fluid passage of the shaft member communicate with each other via the annular recess provided in the fitting inner diameter portion of the bearing member or the fitting outer diameter portion of the shaft member, There is an excellent effect that the swirl angle is not limited to a certain range, and the fluid is reliably supplied even if the swirl is repeated in the same direction.

[Brief description of drawings]

FIG. 1 is a left side view showing a grinder provided with a fluid supply device according to an embodiment of the present invention, and FIG. 2 is a plan view of the grinder. 13 ... (rotating member) swivel base, 25 ... (fixing member) piping duct, 30 ... distributor, 32
...... Bearing member, 33 ...... (fitting inner diameter part) fitting hole, 3
6, 37, 46, 47, 52, 53 ... Fluid passage, 3
8, 39 ... annular recess, 42 ... shaft member, 43 ... (fitting outer diameter portion) fitting shaft portion, 48, 49 ... (tube member) rubber hose, 57 ... rotation transmission member.

Claims (1)

[Scope of utility model registration request] 1. A fluid supply device for supplying a fluid from a fixed member side to a swirling member, wherein a bearing member fixed to the fixed member and provided with a fluid passage, and a fluid passage rotatably fitted to the bearing member. And the fluid passage of the bearing member communicates with the fluid passage of the bearing member via an annular recess provided in the fitting inner diameter portion of the bearing member or the fitting outer diameter portion of the shaft member. A distributor is provided on the fixed member, the shaft member is connected to the swivel member by a rotation transmission member, and the fluid passage of the shaft member and the fluid passage of the swivel member are connected by a pipe member that is a soft elastic body. A fluid supply device characterized in that they are in communication with each other.