JP2017087358A - Wheel supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel supporting device that supports a wheel such as a regulating wheel, which allows the wheel to be easily replaced and enhances support rigidity of the wheel.SOLUTION: A wheel supporting device 10 comprises: a main body portion 20 having a rotary shaft 21 and a bearing portion 22 which bears one side in a shaft direction of the rotary shaft 21; a housing 30, attached to the rotary shaft 21, holding a regulating wheel 11, which is restricted from moving to the one side in the shaft direction and can move to the other side in the shaft direction; and a support member 40 that can support an end part at the other side in the shaft direction of the housing 30 and receives a load acting on the housing 30. The support member 40, provided to be able to positionally change between a support position and a retreat position, which can support the housing 30 by restraining movement of the housing 30 toward the other side in the shaft direction while being at the support position, and allows the housing 30 to move toward the other side in the shaft direction while being at the retreat position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wheel support device.

  FIG. 6 is an explanatory diagram of the prior art showing a part of a grinding machine for grinding a workpiece. In this grinding machine, a workpiece to be ground is a tapered roller (rolling element) 90 used for a tapered roller bearing, and its outer peripheral surface 91 is ground by a grindstone 99. In addition to the grindstone 99, the grinding machine has an adjusting wheel 98 that contacts the outer peripheral surface 91 of the tapered roller 90. By rotating the adjusting wheel 98, the tapered roller 90 is rotated and grinding by the grindstone 99 is performed. Is called.

  The conventional device for rotating the adjusting wheel 98 includes a rotating shaft 97 having a tapered shape and a bearing portion (rolling bearing) 96 that supports one side (left side in FIG. 6) of the rotating shaft 97 in the axial direction. And a housing 94 holding the adjustment wheel 98. The housing 94 has a first holder 94a and a second holder 94b. The first holder 94 a is attached by being fitted around the rotation shaft 97, and rotates integrally with the rotation shaft 97. The second holder 94b is attached to the first holder 94a, and the adjustment wheel 98 can be held by sandwiching the adjustment wheel 98 between the first holder 94a. The housing 94 is attached to the rotary shaft 97 with bolts 93.

  A structure for attaching the housing 94 to the rotating shaft 97 will be further described. A bolt hole 97a into which the bolt 93 is screwed is formed in the rotating shaft 97, and a counterbore hole 94c into which the head portion 93a of the bolt 93 is inserted is formed in the second holder 94b. The housing 94 can be fixed to the rotating shaft 97 by tightening the bolts 93. A configuration in which the housing 94 holding the adjustment wheel 98 is fixed to the rotary shaft 97 by a bolt 93 is disclosed in, for example, Patent Document 1.

  When the tapered roller 90 is ground by the grinder, when the adjusting wheel 98 is brought into contact with the tapered roller 90, a normal grinding force and a tangential force due to the grinding force act on the adjusting wheel 98. To do. Therefore, in order to resist such a force, the main body 95 including the rotating shaft 97 and the bearing portion 96 that supports the rotating shaft 97 needs to be configured to have high rigidity.

Utility Model Registration No. 3019758

  Here, when the model number of the tapered roller 90 to be processed is changed, if the taper angle of the outer peripheral surface 91 is different, the adjustment wheel 98 needs to be replaced (changed). This is because the contact state between the tapered roller 90 and the adjusting wheel 98 is appropriately secured to prevent slippage between them. In order to replace the adjusting wheel 98, the bolt 93 is loosened and removed from the rotating shaft 97, and the housing 94 including the adjusting wheel 98 is detached from the rotating shaft 97. Then, a housing 94 including another adjusting wheel 98 is fitted on the rotary shaft 97 and the bolt 93 is tightened.

  As described above, in order to replace the adjustment wheel 98, the housing 94 needs to be separated or approached in the axial direction with respect to the rotation shaft 97, so that the rotation shaft 97 has a cantilever support structure. However, if the rotating shaft 97 has a cantilever support structure, as described above, in order to increase the rigidity of the main body portion 95 including the rotating shaft 97 and the bearing portion 96, the respective portions such as the rotating shaft 97 and the bearing portion 96 are increased. As a result, the main body 95 also becomes larger. And when the rotating shaft 97 becomes thick especially, the volt | bolt 93 will also become large according to it. As the bolt 93 becomes larger, the screwed portion with the bolt hole 97a also becomes longer, and the amount of rotation of the bolt 93 when the bolt 93 is removed or attached for changing the setup increases. Further, in order to rotate the bolt 93, it is necessary to fix the rotating shaft 97, and workability is poor. For this reason, in the conventional configuration, there is a possibility that the time required for the changeover becomes long.

  In particular, when grinding a wide variety (small amount) of tapered rollers 90, a changeover operation frequently occurs. For this reason, if a lot of work time is required for each changeover, the work efficiency as a whole deteriorates and the productivity decreases. In addition, it is the same not only in a grinder but also in other processing machines that need to be changed according to the change of the workpiece.

  From the above, in order to facilitate the work of changing the wheel like the adjustment wheel 98, the support structure should be a cantilever support structure, but in that case, the support rigidity is lowered. On the other hand, in order to increase the support rigidity of the wheel such as the adjustment wheel 98, a double-sided support structure may be used instead of a cantilevered support structure, but in this case, it becomes difficult to change the wheel. . In other words, in the conventional wheel support device, it is impossible to achieve both ease of wheel replacement and wheel support rigidity.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to increase the support rigidity of a wheel in a wheel support device that supports a wheel such as a regulating vehicle while the wheel (housing including the wheel) can be easily replaced.

  The wheel support device of the present invention has a main body having a rotating shaft and a bearing portion that supports one side in the axial direction of the rotating shaft, a wheel, and a movement to one side in the axial direction is restricted. A housing that is attached to the rotary shaft so as to be movable in the other axial direction; a support member that can support an end of the housing on the other axial side and that receives a load acting on the housing; The support member is provided such that the position of the support member is changeable between a support position and a retracted position, and restrains movement of the housing to the other side in the axial direction while being in the support position. The housing can be supported, and the housing is allowed to move to the other side in the axial direction in the retracted position.

  According to this wheel support device, by changing the position of the support member (by setting it to the retracted position), movement of the housing in the other axial direction is permitted, and replacement of the wheel (housing including the wheel) is facilitated. . Further, the load acting on the housing including the wheel is supported by the main body portion on one side in the axial direction of the housing, and is supported by the support member in the support position on the other side in the axial direction of the housing. That is, in the processing state of the workpiece performed using this wheel support device, the support member is set to the support position, so that a double-sided support structure is obtained as a support structure of the housing including the wheel, thereby the wheel (housing). The support rigidity of the is increased.

The housing includes a first holder that is externally fitted to the rotating shaft, and a first holder that is connected to the first holder and holds the wheel by sandwiching the wheel together with the first holder. Two holders, a cylindrical third holder centering on an axis that coincides with an extension of the rotation center line of the rotary shaft, and the third holder interposed between the second holder and the third holder A bearing member that rotatably supports the second holder, and the third holder has a concave portion or a convex portion formed around the axis, and the supporting member is the concave portion. Or it is preferable to have the convex part or recessed part fitted to a convex part.
According to this configuration, the support member supports the third holder by fitting the concave portion and the convex portion between the third holder and the support member, so that a configuration in which the support member receives a load acting on the housing is obtained. And when rotating a wheel with a rotating shaft, it becomes a structure which rotates a wheel, a 1st holder, and a 2nd holder with respect to a 3rd holder by a bearing member, without sliding between a recessed part and a convex part between each other. As a result, a structure is obtained in which the wheel can rotate together with the rotating shaft and is supported at both ends.

Moreover, it is preferable that the housing has a shaft member that is provided so as to be capable of moving forward and backward in the axial direction and capable of pressing the shaft end surface of the rotating shaft by moving forward.
According to this configuration, the shaft member presses the shaft end surface of the rotating shaft, whereby the housing can be separated from the rotating shaft in the axial direction, which is useful for work for exchanging the wheel.

Further, the support member is movable between the support position at which the housing can be supported and a separation position separated from the housing in the axial direction, and at one position and around the other direction at the separation position. It is preferable to further include a restricting member that is rotatable and restricts rotation of the support member around one direction in the support position.
The support member can support the housing by restraining movement of the housing toward the other side in the axial direction while being in the support position. In this state, when a force acts on the wheel, the force is transmitted to the support member via the housing, but this force can be received by the regulating member. Then, the support member can be in the separated position, and further rotated to the retracted position, thereby allowing the housing to move to the other side in the axial direction and facilitating wheel replacement.

  According to the wheel support device of the present invention, it is possible to increase the support rigidity of the wheel while it is easy to replace the wheel (housing including the wheel).

It is sectional drawing which shows one Embodiment of a wheel support apparatus. It is a side view of a wheel support device. It is an expanded sectional view explaining the contact part of a supporting member and a 3rd holder. It is sectional drawing which shows the state which has a supporting member in a separation position. It is sectional drawing which shows the state which has a supporting member in a retracted position. It is explanatory drawing of the prior art which shows a part of grinder which grinds a workpiece.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an embodiment of a wheel support device. In the present embodiment, the wheel support device 10 is used in a grinding machine for grinding an outer peripheral surface of a workpiece (not shown). And a workpiece is a tapered roller used as a rolling element of a tapered roller bearing, and the outer peripheral surface of a tapered roller is ground. Note that the workpiece may be other.

  The wheel support device 10 has an adjustment wheel 11 (wheel) that is brought into contact with the outer peripheral surface of the workpiece. By rotating the adjustment wheel 11, the workpiece is rotated and grinding is performed by a grindstone not shown. Is called. The wheel support device 10 includes a main body 20 having a rotating shaft 21 for rotating the adjustment wheel 11, a housing 30 holding the adjustment wheel 11, and a support member 40 for supporting the adjustment wheel 11.

  The main body 20 includes a rotating shaft 21 and a bearing portion (rolling bearing) 22 that supports one axial side of the rotating shaft 21 (left side in FIG. 1). The rotary shaft 21 is supported by the bearing portion 22 on one side in the axial direction, but the other side in the axial direction (right side in FIG. 1) is a free end, and the main body portion 20 cantileverally supports the rotary shaft 21. It has the structure. The rotating shaft 21 has a tapered shape. In addition, a key groove is provided on a part of the outer peripheral surface of the rotary shaft 21, and a key 25 is attached to the key groove. The main body 20 further includes a case 24 in which the bearing 22 is housed and attached, and a speed reducer and a motor (not shown) provided in the case 24. As the motor rotates, the rotating shaft 21 rotates about the rotation center line C0.

  The housing 30 is attached to the rotating shaft 21 and holds the adjustment wheel 11. The housing 30 includes a first holder 31, a second holder 32, a third holder 33, and a bearing member 34. The first holder 31 is a cylindrical member and is attached to the rotary shaft 21 by being externally fitted. The inner peripheral surface of the first holder 31 has a tapered shape, and a key groove is provided in a part thereof. The key 25 is attached to the key groove, whereby the housing 30 including the first holder 31 and holding the adjustment wheel 11 can rotate integrally with the rotary shaft 21.

  The second holder 32 is a bottomed cylindrical member and is located on the other side in the axial direction of the rotating shaft 21. The 2nd holder 32 is connected with the 1st holder 31 with the volt | bolt 35, and these holders 31 and 32 can rotate integrally. The holders 31 and 32 are arranged concentrically around the rotation center line C0 of the rotation shaft 21. The second holder 32 is connected to the first holder 31 so that the adjustment wheel 11 is held in the axial direction together with the first holder 31. Thereby, the housing 30 can hold the adjusting wheel 11. The second holder 32 has a cylindrical portion 37 and a bottom portion 36, and a screw hole 36 a is formed in the bottom portion 36. The screw hole 36a is centered on an extension line of the rotation center line C0 and penetrates in the axial direction. The cylinder part 37 is a cylindrical part centering on the axis line C1 which corresponds to the extension line of the rotation center line C0.

  The third holder 33 is provided in the internal space on the radially inner side of the cylindrical portion 37. The third holder 33 is a cylindrical member centered on the axis C1. The third holder 33 is formed with a through hole 33a penetrating in the axial direction. The through hole 33a is connected to the screw hole 36a, and a screw shaft (shaft member) 50 is screwed into the screw hole 36a. The screw shaft 50 can be rotated by a tool through the through hole 33a, and the screw shaft 50 becomes a shaft member that can move forward and backward in the axial direction by the rotation. The screw shaft 50 can press the shaft end surface 23 of the rotating shaft 21 by moving the screw shaft 50 forward toward the rotating shaft 21 side. The function of the screw shaft 50 will be described later.

  The bearing member 34 is constituted by two rows of ball bearings, but may be other types of bearings. The bearing member 34 is interposed between the second holder 32 and the third holder 33, and supports the second holder 32 rotatably with respect to the third holder 33. When the rotating shaft 21 rotates, the first holder 31, the second holder 32, and the adjustment wheel 11 rotate, but the third holder 33 is in a fixed state together with the support member 40.

  As described above, the housing 30 holding the adjustment wheel 11 is attached to the rotary shaft 21 so as to be fitted to the rotary shaft 21, and the tapered surface of the rotary shaft 21 and the tapered surface of the first holder 31 are fitted to each other. Movement in one direction is restricted. In contrast, as will be described later, in the state where the support member 40 is in the retracted position as shown in FIG. 5, the rotating shaft 21 has a cantilevered support structure, and therefore the housing 30 holding the adjustment wheel 11. Can move to the other side in the axial direction.

  In FIG. 1, the support member 40 is composed of an arm member attached to the base member 12 provided in the wheel support device 10, and the support member 40 does not rotate even when the rotary shaft 21 rotates. However, as will be described later, in the state where the support member 40 is in a separated position away from the housing 30 as shown in FIG. 4, the support member 40 is rotated about the axis C <b> 2 by the shaft 41 provided on the base member 12. Can be rotated in one direction and the other direction (see FIG. 2). FIG. 2 is a side view of the wheel support device 10.

  The wheel support device 10 further includes a lock mechanism 42. The lock mechanism 42 can be switched between a state in which the support member 40 is restrained and a state in which the restraint is released. FIG. 1 shows a state in which the support member 40 is restrained. 4 and 5 show a state where the restraint is released, and in this state, the support member 40 does not support the housing 30. FIG. The lock mechanism 42 has a clamp lever 43, and in the locked state shown in FIG. 1, the support member 40 is restrained from moving to the other side in the axial direction (right side in the axial direction in FIG. 1). Further, in this locked state, the lock mechanism 42 can press a part (the contact portion 44) of the support member 40 against the third holder 33 toward the one side in the axial direction. Therefore, in the locked state shown in FIG. 1, the support member 40 can support the housing 30, and the position of the support member 40 shown in FIG. 1 is the support position.

On the other hand, when the clamp lever 43 is rotated, the locked state is released and the movement of the support member 40 to the other side in the axial direction is allowed. The state shown in FIG. 4 is a state in which the support member 40 is moved to the other side in the axial direction and separated from the housing 30 (third holder 33) in the axial direction. The position of the support member 40 shown in FIG. 4 is a separation position.
As described above, the support member 40 is movable between a support position (see FIG. 1) at which the housing 30 can be supported and a separation position (see FIG. 4) away from the housing 30 in the axial direction. .

  Then, the support member 40 can rotate around the axis C2 in a state of being at a separation position (see FIG. 2). The state shown by the solid line in FIG. 2 shows a state in which the support member 40 is displaced from the support position to the separation position. The state indicated by the two-dot chain line in FIG. 2 is a state in which the support member 40 at the separation position is rotated about the axis C2. The position of the support member 40 indicated by the two-dot chain line in FIG. 2 is the retracted position. In order to change the adjustment wheel 11, the housing 30 including the adjustment wheel 11 is moved to the other side in the axial direction so as to be detached from the rotating shaft 21. At the time of this separation, the adjustment wheel 11 (housing 30) and the support member The position where no interference with 40 is the retracted position. FIG. 5 shows a state where the support member 40 is in the retracted position.

  When the housing 30 including another adjusting wheel 11 is attached to the rotary shaft 21, the support member 40 is rotated around the axis C2 to be displaced from the retracted position (FIG. 5) to the separated position (FIG. 4). The support member 40 is moved in the axial direction from the separation position (FIG. 4) to the support position (FIG. 1). As described above, the support member 40 is rotatable in one direction and in the other direction in a state where the support member 40 is in the separated position.

A contact portion between the support member 40 and the third holder 33 will be described. As shown in FIG.
The third holder 33 has a recess 38 on the end surface on the other side in the axial direction. The recess 38 is formed around the axis C1. The concave portion 38 has a tapered surface 38a whose diameter decreases toward one side in the axial direction, and the center line of the tapered surface 38a coincides with the axis C1. The recess 38 (tapered surface 38a) is continuous with the through hole 33a.

  On the other hand, the support member 40 has a contact portion 44 that can contact the third holder 33. The contact portion 44 has a convex portion 45 on the end surface on one side in the axial direction. The convex portion 45 has a shape that fits into the concave portion 38. That is, the convex part 45 has the taper surface 45a whose diameter becomes small as it goes to the axial direction one side. In a state where the support member 40 is in the support position, the center line of the convex portion 45 (taper surface 45a) coincides with the axis C1.

  In a state where the support member 40 is at the support position, the tapered surface 38a having a concave shape and the tapered surface 45a having a convex shape are closely fitted to each other. Thereby, the support member 40 can support the end of the other side of the housing 30 in the axial direction, and can receive a load acting on the housing 30. The taper surface 38a and the taper surface 45a are tightly adhered by pressing the support member 40 against the third holder 33 toward the one side in the axial direction by the lock mechanism 42 (see FIG. 1). .

  As described above, the support member 40 of the present embodiment is provided such that the position can be changed between the support position (see FIG. 1) and the retracted position (see FIG. 5) via the separation position shown in FIG. Yes. With the support member 40 in the support position (see FIG. 1), the housing 30 can be supported by restraining the movement of the housing 30 toward the other side in the axial direction. Further, the movement of the housing 30 to the other side in the axial direction is allowed in a state where the support member 40 is in the retracted position (see FIG. 5).

  The wheel support device 10 further includes a regulating member 55 that regulates the rotation of the support member 40 as shown in FIGS. 1 and 2. The restriction member 55 of the present embodiment is a shaft member, is fixed to a part of the base member 12, and protrudes toward the other side in the axial direction. And the hollow part 40a in which the front part of this control member 55 fits in a part of support member 40 is formed. As shown in FIG. 1, in a state where the support member 40 is in the support position, the restricting member 55 is engaged with the recess 40a, and the rotation of the support member 40 around one direction (in the direction of arrow R1 in FIG. 2) is restricted. The On the other hand, in a state where the support member 40 is in the separation position (see FIG. 4) and the retracted position (see FIG. 5), the regulating member 55 does not engage with the recess 40a, and the support member 40 is in one direction and the other direction. It becomes freely rotatable.

  The restricting member 55 engages with a part of the support member 40 (the recessed portion 40 a) and disables the rotation of the support member 40 around one direction, so that the support member 40 receives a radial load acting on the housing 30. It becomes possible to receive. That is, when the adjustment wheel 11 comes into contact with the workpiece when the workpiece is ground by the grinding machine using the wheel support device 10, the normalization direction grinding force and the tangent resulting from the grinding force are applied to the adjustment wheel 11. Directional force (force in the direction indicated by arrow F in FIG. 2) acts. In particular, the tangential force (F) is transmitted to the support member 40 at the support position via the housing 30 and tries to rotate the support member 40 in one direction (the direction of the arrow R1 in FIG. 2). Therefore, the restriction member 55 is engaged with a part of the support member 40 (the recessed portion 40a), so that the rotation of the support member 40 around one direction (the direction of the arrow R1 in FIG. 2) is prevented. The restriction member 55 receives the force (F), and the force (F) can be transmitted to the base member 12.

  Thus, the force acting on the adjustment wheel 11 can be supported by the bearing portion 22 of the main body portion 20 on the one axial side and the support member 40 on the other axial side. In other words, the wheel support device 10 can have a both-end support structure.

In the wheel support device 10 having the above configuration, for example, an operation (replacement operation) for exchanging the adjustment wheel 11 by changing the size of a workpiece to be processed next will be described.
1 and 2, the clamp lever 43 is loosened, the support member 40 is moved from the support position (FIG. 1) to the separation position (FIG. 4), and the support member 40 in the separation position is further rotated to move to the retracted position ( Move to FIG.
Then, the housing 30 holding the adjustment wheel 11 is moved to the other side in the axial direction and removed from the rotating shaft 21. At this time, the first holder 31 of the housing 30 is strongly fitted to the rotating shaft 21 and may not be easily removed. However, in the present embodiment, the screw shaft 50 is attached to the second holder 32 so that the screw shaft 50 can advance and retreat, and the screw shaft 50 is rotated and moved forward toward the shaft end surface 23 side of the rotary shaft 21, thereby The shaft 50 presses the shaft end surface 23. Thereby, even if the housing 30 is strongly fitted to the rotating shaft 21, the housing 30 can be easily separated from the rotating shaft 21. In addition, since the gap between the second holder 32 and the shaft end surface 23 is very small, the amount of rotation of the screw shaft 50 is small, and the operation is simple.

  Then, another housing 30 holding another adjustment wheel 11 is attached to the rotating shaft 21 by being externally fitted. Thereafter, the support member 40 in the retracted position is rotated to the separation position (FIG. 4), and further returned to the support position (FIG. 1), and the clamp lever 43 is tightened. Thereby, the convex part 45 (refer FIG. 3) of the support member 40 and the recessed part 38 of the 3rd holder 33 fit again, and the state which the support member 40 supported the housing 30 containing the adjustment wheel 11 is obtained. Thereby, the changeover of the adjustment wheel 11 is completed.

As described above, according to the wheel support device 10 of the present embodiment, the movement of the housing 30 to the other side in the axial direction is allowed and adjusted by changing the position of the support member 40 (by setting the retracted position shown in FIG. 5). The vehicle 11 (the housing 30 including the adjustment vehicle 11) can be easily replaced. As a result, the replacement work time can be shortened, which can contribute to the improvement of production efficiency.
Further, when the workpiece is ground by the grinding machine using the wheel support device 10, a load acting on the housing 30 including the adjustment wheel 11 is supported by the main body 20 on one side in the axial direction of the housing 30. Is supported by the support member 40 in the support position on the other side in the axial direction. That is, in the processed state, by setting the support member 40 to the support position, a both-end support structure is obtained as the support structure of the housing 30 including the adjustment wheel 11, thereby increasing the support rigidity of the adjustment wheel 11 (housing 30). . That is, it becomes possible to achieve both the ease of replacement of the adjustment wheel 11 and the improvement of the support rigidity of the adjustment wheel 11.

Further, as described above, since the double-sided support structure is adopted, it is possible to reduce the size of the rotary shaft 21 and the bearing portion 22 that supports the rotary shaft 21 as compared with the conventional cantilever support structure. As a result, the main body 20 can be downsized.
Further, in the case of the conventional configuration shown in FIG. 6, the housing 94 is attached to the rotating shaft 97 by the bolt 93, and it is necessary to tighten the bolt 93 strongly. However, in particular, the second holder 94b is bent by this tightening, and thereby the adjustment wheel 98 is also bent. If the tightening torque of the bolt 93 is varied every time the adjustment wheel 98 is changed, the bending (attachment state) of the adjustment wheel 98 is not constant, and the contact state with the workpiece becomes unstable and the machining accuracy is increased. May be affected. However, according to the wheel support device 10 of the present embodiment, it is not necessary to tighten the bolt 93 that causes the bending of the housing 94 as in the prior art, and the changeover work is simple and the work piece is not damaged. It becomes possible to improve processing accuracy. In addition, the mounting state of the adjustment vehicle 11 is stabilized for each changeover operation.

  Further, in the present embodiment (see FIG. 3), the support member 40 supports the third holder 33 by fitting the concave portion 38 and the convex portion 45 between the third holder 33 and the support member 40 of the housing 30. By doing so, a configuration in which the support member 40 receives a load acting on the housing 30 is obtained. And when rotating the adjustment wheel 11 with the rotating shaft 21, these recessed part 38 and the convex part 45 are in the state which contacted by the surface (taper surface 38a, 45a), without sliding between each other, and The structure which rotates the adjustment wheel 11, the 1st holder 31, and the 2nd holder 32 with respect to the 3rd holder 33 by the bearing member 34 is obtained. As a result, the adjustment wheel 11 can rotate together with the rotary shaft 21, and a structure that supports both ends can be obtained, and the support rigidity of the adjustment wheel 11 can be increased.

  The embodiments disclosed above are illustrative in all respects and not restrictive. That is, the wheel support device of the present invention is not limited to the illustrated form, and may be of another form within the scope of the present invention, or may be a wheel support device that supports a wheel other than the adjustment vehicle 11. . For example, in the above-described embodiment, the case where the wheel support device 10 is used in a grinder has been described, but the wheel support device 10 may be used in a processing machine other than the grinder.

  Moreover, in the said embodiment, in order that the support member 40 may support the housing 30, the 3rd holder 33 has the recessed part 38, and the support member 40 has the convex part 45 fitted to this recessed part 38. However, the concave portion and the convex portion may be opposite to each other. That is, although not shown, the third holder 33 may have a convex portion formed around the axis C1, and the support member 40 may have a concave portion that fits into this convex portion.

DESCRIPTION OF SYMBOLS 10: Wheel support apparatus 11: Adjustment wheel (wheel) 20: Main-body part 21: Rotating shaft 22: Bearing part 23: Shaft end surface 30: Housing 31: First holder 32: Second holder 33: Third holder 34: Bearing member 38: Concave portion 40: Support member 45: Convex portion 50: Screw shaft (shaft member)
55: Restriction member C0: Center of rotation C1: Axis

Claims (4)

A main body having a rotating shaft and a bearing portion supporting one side in the axial direction of the rotating shaft;
A housing that holds the wheel and is restricted from moving to one side in the axial direction and capable of moving to the other side in the axial direction and attached to the rotary shaft;
A support member capable of supporting the other end of the housing in the axial direction and receiving a load acting on the housing;
With
The support member is provided so that the position of the support member can be changed between a support position and a retracted position, and the housing can be supported by restricting movement of the housing to the other side in the axial direction while being in the support position. A wheel support device that allows the housing to move to the other side in the axial direction while being in the retracted position. The housing includes a first holder that is externally fitted to the rotating shaft, and a second holder that is connected to the first holder and holds the wheel by sandwiching the wheel together with the first holder. And a third cylindrical holder centering on an axis that coincides with an extension of the rotational center line of the rotary shaft, and interposed between the second holder and the third holder with respect to the third holder A bearing member that rotatably supports the second holder;
The third holder has a concave portion or a convex portion formed around the axis,
The wheel support device according to claim 1, wherein the support member has a convex portion or a concave portion that fits into the concave portion or the convex portion.   3. The wheel support device according to claim 1, wherein the housing includes a shaft member that is provided so as to be capable of moving forward and backward in an axial direction and capable of pressing the shaft end surface of the rotating shaft by moving forward. The support member can move between the support position at which the housing can be supported and a separation position that is separated from the housing in the axial direction, and can rotate in one direction and another direction at the separation position. And
The wheel support device according to any one of claims 1 to 3, further comprising a restricting member that restricts rotation of the support member around one direction in the support position.

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