JP5890199B2 - Driving force transmission device - Google Patents

Description

  The present invention relates to a driving force transmission device, and more particularly to a driving force transmission device capable of transmitting a driving force by bringing the contact surfaces of first and second rotating members into contact with each other.

  Conventionally, in order to transmit a driving force from a driving device such as a motor to a roller or the like, a driving force transmission device has been used (for example, see Patent Document 1). As such a driving force transmission device, a shaft member connected to a roller or the like, first and second rotating members supported by the shaft member, and a biasing force so that the second rotating member abuts on the first rotating member. Some with possible biasing means. The first rotating member is provided to be rotatable relative to the shaft member via a pulley, a belt, and a motor. The second rotating member is connected to the shaft member and provided rotatably with the shaft member. Accordingly, when the second rotating member is urged by the urging means and the second rotating member comes into contact with the rotating first rotating member, the torque of the first rotating member is transmitted to the second rotating member, and the shaft member rotates. It is supposed to be.

JP 2008-185096 A

  However, in the driving force transmission device disclosed in Patent Document 1, by repeating contact and separation of the first and second rotating members a plurality of times, their contact surfaces generate heat and become high temperature, The contact surface is likely to deteriorate or wear. For this reason, the shape of the contact surfaces changes with time, the contact surfaces become partial contact, and drive transmission loss such as rotational torque and rotational speed occurs, or abnormal noise occurs. There is an inconvenience of doing. In addition, when used in a particularly inferior environment, dust or dust flying in the air is caught between the contact surfaces, which also leads to the inconvenience.

[Object of invention]
An object of the present invention is to provide a driving force transmission device capable of eliminating transmission loss and preventing occurrence of abnormal noise.

In order to achieve the above object, the present invention provides a first rotating member provided to be rotatable relative to the shaft member when the shaft member is inserted, and the shaft member when the shaft member is inserted. The first rotating member and the second rotating member are moved in the axial direction of the inserted shaft member through at least one of the second rotating member and the first rotating member and the second rotating member provided so as not to rotate relative to each other. And an urging means capable of contacting and separating the rotating member, wherein the driving force applied to the first rotating member can be transmitted to the shaft member by bringing the first rotating member and the second rotating member into contact with each other. In the driving force transmission device,
The first and second rotating members are each provided with an abutting surface that abuts each other, and a spraying means capable of spraying gas on the abutting surface is provided ,
Wherein the biasing means is adopted a structure that, Ru an elastic member for biasing said second rotary member in a direction away from the first rotary member.

In the present invention, the spraying means sprays gas only while the contact surfaces of the first and second rotating members are separated from each other, and sprays gas while the contact surfaces are in contact. A configuration of stopping is also preferably employed.

  According to the present invention, since the gas is blown onto the contact surface by the spraying means, it is possible to cool the contact surface and to remove dust or dust between the contact surfaces. Thereby, deterioration and wear of the contact surface can be suppressed, and it is possible to prevent each contact surface from being deformed and becoming a partial contact. As a result, it is possible to avoid occurrence of transmission loss due to partial contact and occurrence of abnormal noise.

  Further, when gas is blown from the outer peripheral surface side of the shaft member to the contact surface by the spraying means, dust or the like can be blown out from the contact surface to the outside of the driving force transmission device, and dust or the like remains in the device. This can be prevented.

1 is a schematic front sectional view of a driving force transmission device according to an embodiment. Explanatory drawing which shows the point which transmits the driving force in the said driving force transmission apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, without giving a reference figure, for example, when showing directions such as up, down, left, right, near side, and back, all of FIG. 1 is viewed from a normal direction. , And the top, bottom, left, and right directions are directions parallel to the paper surface, and the front and back directions are directions orthogonal to the paper surface.

  In FIG. 1, a driving force transmission device 10 includes a columnar shaft member 11 extending in the left-right direction, and first and second rotating members 13 and 14 supported by the shaft member 11 in a state where the shaft member 11 is inserted. And a biasing means 15 provided at a position adjacent to the right side of the second rotating member 14, a spraying means 16 capable of spraying gas to the first and second rotating members 13, 14, and a biasing means 15 and spraying. And a control means 19 for controlling the means 16. A roller RL is connected to the left end side of the shaft member 11.

  The first rotating member 13 has a contact surface 22 on the right surface thereof, and the shaft member 11 is rotated regardless of whether or not the shaft member 11 itself rotates about the axis via the rotating bearing 21 when the shaft member 11 is inserted. It is provided so as to be rotatable about the axis of the rotation center. The first rotating member 13 includes a pulley PL fixed to the first rotating member 13, a pulley PL1 fixed to a rotation motor MT as a driving device, and a belt BT wound around the pulleys PL and PL1. The driving force of the rotation motor MT is applied via the.

  The second rotating member 14 includes a rail member 24, which is movable in the axial direction (left-right direction) of the shaft member 11 through the rail member 24 when the shaft member 11 is inserted, and The shaft member 11 is provided so as to be rotatable together with the shaft member 11 about the shaft center. The second rotating member 14 includes an abutting member 26 whose left surface is the abutting surface 25, and the abutting surface 25 is provided so as to be in surface contact with the abutting surface 22 of the first rotating member 13.

  The urging means 15 includes a chamber 29 in which an air chamber 28 is formed, a pressurizing means 32 such as a compression pump or a turbine for supplying gas to the air chamber 28 through an electromagnetic valve 31, a rotary bearing 21 and a rail member 24. And an elastic member 33 such as a compression spring or rubber that urges the second rotating member 14 to the right.

  The chamber 29 includes a moving body 35 supported by the second rotating member 14 via a rotating bearing 34, and a rotating bearing 37 on a receiving plate 38 that can be fixed to the shaft member 11 by a stopper such as a screw or a pin (not shown). And a fixed body 36 supported by the support. The fixed body 36 is combined with the right side of the moving body 35 to form an air chamber 28. The fixed body 36 is provided with a passage 36 </ b> A that communicates with the air chamber 28, and the air chamber 28 can communicate with the pressurizing means 32 via the electromagnetic valve 31. In addition, a seal member 39 such as an O-ring or packing that prevents the gas in the air chamber 28 from leaking outside is provided at the sliding portion between the moving body 35 and the fixed body 36. The rotary bearings 34 and 37 may be thrust bearings that allow relative rotation with the shaft member 11 and the second rotary member 14.

  The blowing means 16 includes a flow path 42 formed by hollowing from the right end side of the shaft member 11 to a position reaching between the first and second rotating members 13, 14, and the first and second rotating members 13. 14, the air outlet 43 that can blow the gas supplied to the flow path 42 from the outer peripheral surface side of the shaft member 11 to the contact surfaces 22 and 25, and the rotary joint 44 provided on the right end side of the shaft member 11. And is capable of communicating with the pressurizing means 32 through the electromagnetic valve 46. A plurality of air outlets 43 are formed at predetermined intervals in the circumferential direction of the shaft member 11, and gas can be blown over the entire contact surfaces 22 and 25.

  The control means 19 can be constituted by a sequencer, a personal computer or the like. The control means 19 is connected to an input means (not shown) composed of an operation panel, a keyboard, and the like, and operation conditions, data, and the like of the electromagnetic valves 31 and 46 can be input by this input means. The control means 19 has a function of controlling the electromagnetic valves 31 and 46, and is provided so as to be able to control the timing at which the gas is supplied from the pressurizing means 32 to the air chamber 28 and the flow path 42 or the supply is released. . The control means 19 is electrically connected to the electromagnetic valves 31, 46, etc. by a cable, a radio structure, or the like.

  Next, the overall operation in this embodiment will be described.

  First, as shown in FIG. 1, the shaft member 11 is inserted into the first and second rotating members 13 and 14, and the receiving plate 38 is fixed to the shaft member 11. And if the rotation motor MT is driven, the 1st rotation member 13 will rotate via pulley PL1, belt BT, and pulley PL.

  When transmitting the driving force to the roller RL, the control unit 19 switches the valve of the electromagnetic valve 31 in a direction in which the pressurizing unit 32 and the air chamber 28 communicate with each other, and supplies gas to the air chamber 28 to move the moving body. 35 is moved leftward. By this movement, the contact surface 25 of the second moving body 14 approaches the contact surface 22 of the first rotating member 13 against the force of the elastic member 33, and the contact surfaces 22, 25 are in contact with each other. Is given. Due to the contact of each contact surface 22, 25, the driving force is transmitted from the first rotating member 13 to the second rotating member 14, that is, the second rotating member 14 rotates together with the first rotating member 13, and the shaft is rotated by the rotation. The member 11 and the roller RL rotate. As a result, the driving force of the rotation motor MT is transmitted to the roller RL via the driving force transmission device 10.

  On the other hand, when canceling the transmission of the driving force to the roller RL, the control means 19 switches the valve of the electromagnetic valve 31 in a direction in which the pressurizing means 32 and the air chamber 28 are shut off, and the pressurizing means 32 moves to the air chamber. The gas supply to 28 is stopped, and the gas in the air chamber 28 is discharged. Thereby, the second rotating member 14 and the moving body 35 move rightward by the force of the elastic member 33, and the contact surface 22 of the first rotating member 13 and the contact surface 25 of the second rotating member 14 are separated from each other. Then, the driving force transmission between them is released.

  Here, the control means 19 switches the valve of the electromagnetic valve 46 in a direction in which the pressurizing means 32 and the flow path 42 communicate with each other, supplies gas into the shaft member 11, and becomes the outer peripheral surface side of the shaft member 11. Gas is blown from the air outlet 43 to the contact surfaces 22 and 25. Note that the gas blowing is always performed while the first rotating member 13 is rotating, and is performed only while the abutting surfaces 22 and 25 are separated from each other, and is stopped while the abutting surfaces are abutting. 19 may control the operation of the electromagnetic valve 46.

  Therefore, according to such an embodiment, even if the contact surfaces 22 and 25 rub against each other and generate heat by blowing gas to the contact surfaces 22 and 25, the contact surfaces 22 and 25 25 can be cooled, and it becomes possible to suppress deterioration and wear over time. By suppressing such deterioration and the like, for example, the contact surface 25 is unevenly worn and deformed so as to be inclined with respect to the shaft center of the shaft member 11 and only a part thereof is prevented from contacting the contact surface 22. Thus, while the driving force is transmitted, the contact surfaces 22 and 25 can be kept in surface contact with each other. As a result, a part of the contact surface 25 and the contact surface 22 rub against each other to prevent transmission loss or abnormal noise. Further, even if dust or dust is present between the contact surfaces 22 and 25, they can be blown away and the deterioration and wear of the contact surfaces 22 and 25 can be suppressed, and the above-described functions and effects can be achieved. Get better. Further, since dust or the like between the contact surfaces 22 and 25 is blown from the inner side toward the outer side from the blower outlet 43, it is possible to make it difficult to deposit dust or the like inside the driving force transmission device 10, which is caused by the dust or the like. It is possible to prevent problems before they occur.

As described above, the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
In other words, the present invention has been illustrated and described mainly with respect to specific embodiments, but without departing from the scope of the technical idea and object of the present invention, the shape, position, or With respect to the arrangement and the like, those skilled in the art can make various changes as necessary.
Therefore, the description limited to the shape disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded one part or all part is included in this invention.

  For example, the spraying means 16 may be provided with an air outlet outside the first and second rotating members 13 and 14 to perform gas spraying, but from the outer peripheral surface side of the shaft member 11 as in the above embodiment. It is advantageous that the gas is blown onto the contact surfaces 22 and 25 in that dust or the like hardly remains in the apparatus.

  The drive device in the embodiment includes an electric device such as a rotation motor, a linear motion motor, a linear motor, a single axis robot, an articulated robot, an actuator such as an air cylinder, a hydraulic cylinder, a rodless cylinder, and a rotary cylinder. In addition to these, a combination of them directly or indirectly may be employed (some of them overlap with those exemplified in the embodiment).

  Further, the shaft member 11 is not limited to the above-described configuration, but the biasing means 15 and the second rotating member 14 are inserted into a different-shaft concentric shaft, for example, a shaft member, The structure which provided the 1st rotation member 13 in the other axis | shaft provided on the concentric axis | shaft may be sufficient. Also, the biasing means 15 and the second rotating member 14 are inserted into an eccentric eccentric shaft, for example, a shaft member, and the first rotating member 13 is attached to the shaft center of the shaft member and another shaft provided on the eccentric shaft. The provided structure may be sufficient.

DESCRIPTION OF SYMBOLS 10 Driving force transmission apparatus 11 Shaft member 13 1st rotation member 14 2nd rotation member 15 Energizing means 16 Spraying means 22 Contact surface 25 Contact surface MT Rotation motor (drive device)

Claims (2)

A first rotating member provided so as to be rotatable relative to the shaft member when the shaft member is inserted, and a second provided so as not to be rotatable relative to the shaft member when the shaft member is inserted. An urging means capable of moving the rotating member and at least one of the first rotating member and the second rotating member in the axial direction of the inserted shaft member to contact and separate the first rotating member and the second rotating member. A driving force transmission device capable of transmitting the driving force applied to the first rotating member by contacting the first rotating member and the second rotating member to the shaft member;
The first and second rotating members are each provided with an abutting surface that abuts each other, and a spraying means capable of spraying gas on the abutting surface is provided ,
The driving force transmitting device according to claim 1, wherein the urging means includes an elastic member that urges the second rotating member in a direction away from the first rotating member . The spraying means performs the gas spray only while the contact surfaces of the first and second rotating members are separated from each other, and stops the gas spray while the contact surfaces are in contact. The driving force transmission device according to claim 1, wherein:

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