JP2009287656A - Bearing block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flange type bearing block, easily removed from a device wall face by using the conventional pull-out tool. <P>SOLUTION: The bearing block retaining a bearing includes a shaft hole receiving the bearing, and the circumference of the shaft hole at a back face of the bearing block is provided with projections forming contact faces. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bearing block, and more particularly to a flange-type bearing block that can be easily removed from a mounting surface such as a wall surface of an apparatus.

  A rotating shaft used for a pulley or the like of a conveyor device is usually attached to the device in a rotatable manner via a bearing held by a bearing block. This bearing block is generally referred to as a “pillow block” or the like, and has a shaft hole that receives the bearing and a back surface that faces the surface of the device to which the bearing block is attached.

  The bearing block is roughly divided into a pillow type unit and a flange type unit according to the orientation of the back surface with respect to the axial direction of the shaft hole. The pillow type unit is selected as appropriate when the normal direction of the back surface intersects the axial direction of the shaft hole perpendicularly, and the flange type unit is appropriately selected when the normal direction of the back surface matches the axial direction of the shaft hole. The Examples of such pillow-type units and flange-type units are shown, for example, in Japanese Utility Model Laid-Open No. 6-22622.

  By the way, in general, the conventional bearing block is attached so that at least the edge of the back surface is in close contact with the apparatus wall surface over the entire periphery of the back surface.

  When exchanging the bearing, in particular, the bearing housed in the flange-type unit is usually pulled out from the rotating shaft as a whole with the bearing block using a pulling tool such as a pulley puller. However, as described above, the conventional bearing block is attached in a state in which the edge of the back surface is in contact with the apparatus wall surface without a gap over the entire periphery of the back surface. Further, there is no projection for hooking the nail of the extraction tool. Therefore, in this state, the claw of the extraction tool cannot be hooked on the bearing block and extracted from the rotating shaft. For this reason, when exchanging the bearing, it is necessary to perform an operation for forming a gap for hooking the claw of the extraction tool between the flange-type unit and the apparatus wall surface. As a method for forming the gap, there is used a method in which chisel or the like is pressed against the edge of the flange type unit and an impact force is applied with a hammer to lift the flange type unit from the apparatus wall surface. However, this method tends to cause damage to the flange-type unit and the wall surface of the apparatus to which the flange-type unit is attached. Further, an operation for forming a gap is required every time the bearing is replaced, which is not efficient.

  The flange-type bearing shown in the above-mentioned Japanese Utility Model Publication No. 6-22622 is a bearing that rotatably supports a screw rod for position adjustment, and includes a lever for locking the screw rod so that the rotation of the screw rod can be released. However, Japanese Utility Model Laid-Open No. 6-22622 does not particularly describe the shape of the back surface of the flange-type unit, and does not particularly describe the method of replacing the bearing fitted into the shaft hole of the unit.

  Japanese Patent Laid-Open No. 2000-27876 discloses a flange-type unit provided with a notch groove for a bolt in order to facilitate fine adjustment of the mounting height, but there is no particular description of the shape of the back surface of this unit. There is no description on how to replace the bearing.

As means for facilitating replacement of a bearing, Japanese Patent Application Laid-Open No. 62-237116 discloses a bearing block that can be divided into upper and lower parts and can be applied to both a pillow type and a flange type. The shape of is not specifically described. Japanese Patent Laid-Open No. 58-178019 describes a mounting structure in which an end of a housing for housing a bearing is inserted into a hole formed in a frame of the apparatus. It is made to contact with the wall surface of no gap.
Utility Kaihei 6-22622 JP 2000-27876 A JP-A-62-237116 JP 58-178019 A

  An object of the present invention is to provide a flange-type bearing block that can be easily removed from a wall surface of a device using a conventional puller.

  According to invention of Claim 1, it is a bearing block holding a bearing, and the bearing block has a shaft hole for receiving the bearing, and around the shaft hole on the back surface of the bearing block, A bearing block is provided, provided with a protrusion that forms a contact surface. In this configuration, when the bearing block is attached to the device wall surface, only the contact surface of the protrusion formed around the shaft hole on the back surface of the bearing block contacts the device wall surface, and the dimension corresponds to the height of the protrusion. Is formed between the peripheral edge of the back surface of the bearing block and the apparatus wall surface. Therefore, unlike the prior art, there is no need to apply an impact force with a hammer to form a gap, and there is no risk of damage to the bearing block and the apparatus wall surface. In addition, since it is not necessary to perform the work for forming such a gap every time the bearing is replaced, the bearing can be replaced efficiently.

  According to the invention of claim 2, in addition to the feature of the invention of claim 1, the contact surface of the protrusion provided around the shaft hole is continuous along the circumference of the shaft hole. . In this configuration, the contact surface that contacts the device wall surface is continuous along the periphery of the shaft hole. Therefore, when the bearing block is attached to the device wall surface, the entire periphery of the rotating shaft is between the device wall surface and the bearing block. Is surrounded by a protrusion. As a result, the periphery of the rotating shaft can be shielded from the external environment. Therefore, the rotating shaft can be contaminated by foreign matter or water from the external environment, or foreign matter or water can enter the bearing block or inside the device. Can be prevented.

  According to the invention of claim 3, in addition to the features of the invention of claim 1 or 2, the bearing block is formed with a bolt hole penetrating the back surface, and around the bolt hole on the back surface, Protrusions that form the contact surfaces are provided. According to this configuration, when the bearing block is attached to the apparatus wall surface, only the contact surface of the protrusion formed around the shaft hole and the bolt hole on the back surface of the bearing block contacts the apparatus wall surface. A gap having a dimension corresponding to the height is formed between the peripheral edge of the back surface of the bearing block and the apparatus wall surface. Therefore, unlike the prior art, there is no need to apply an impact force with a hammer to form a gap, and there is no risk of damage to the bearing block and the apparatus wall surface.

  According to the invention of claim 4, in addition to the features of the invention of claim 3, the contact surface of the protrusion provided around the bolt hole is continuous along the circumference of the bolt hole. . In this configuration, the contact surface that contacts the device wall surface is continuous along the periphery of the bolt hole. Therefore, when the bearing block is attached to the device wall surface, the rotation shaft and the bolt are not connected between the device wall surface and the bearing block. The entire periphery is surrounded by the protrusion. As a result, the periphery of the rotating shaft and the bolt can be shielded from the external environment. Therefore, the rotating shaft and the bolt are contaminated by foreign matter and water from the external environment, and the foreign matter and water etc. enter the bearing block and the inside of the device. Intrusion can be prevented. Moreover, since the contact surface with respect to an apparatus wall surface increases, a bearing block can be attached more stably.

  According to the invention of claim 5, in addition to the features of the invention of claim 3 or 4, the projection provided around the shaft hole and the projection provided around the bolt hole. The parts are spaced apart from each other. Thereby, when the bearing block is attached to the apparatus wall surface, a gap is formed between the protrusion formed around the shaft hole and the protrusion formed around the bolt hole. As a result, even if the bearing block is used in a place where processing using water such as cleaning water and cooling water is performed, the water naturally flows through the gap, so that the space between the bearing block and the device wall surface Water does not collect in the water. For this reason, generation | occurrence | production of rust can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the flange type bearing block which can be easily removed from an apparatus wall surface using the conventional extraction tool can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The present embodiment is applied to a bearing block generally called a flange type.

  1 to 6 show a bearing block 1 according to an embodiment of the present invention. The bearing block 1 of the present invention is used by being fixed to a mounting surface such as a wall surface 10 of a device so as to hold a bearing attached to a rotating shaft of a device to which the bearing block 1 is attached, for example, a conveyor device. Similarly to the flange type bearing block, it can be formed as a single member or a combination of a plurality of members by molding using steel, resin, light metal or the like.

  1 and 2 are a front view and a rear view, respectively, of the bearing block 1, and FIG. 3 is a perspective view of the bearing block 1 as viewed from the back 2 side. 4 is a side view of the bearing block 1 attached to the apparatus wall surface 10, and FIG. 5 is a cross-sectional view of the bearing block 1 when attached to the wall surface 10 along the line AA in FIG. FIG.

  Specifically, the bearing block 1 includes a cylindrical housing portion 7 having a side wall forming a shaft hole 4 as a through hole for receiving a bearing and a rotating shaft (not shown), and one end of the housing portion 7. A plate-like flange portion 3 extending outward in the radial direction of the shaft hole 4 is provided. The back surface 2 of the bearing block 1 is a surface that is disposed to face the wall surface 10 of the device when the bearing block 1 is fixed to the device. The back surface 2 extends from the inner peripheral surface forming the shaft hole 4 of the housing portion 7 to the outer edge portion of the flange portion 3 (see FIG. 5). As shown in FIGS. 2 and 3, extraction holes 30 are formed at two positions substantially symmetrical with respect to the central axis C of the shaft hole 4 at the end of the shaft hole 4 on the back surface 2 side. Yes. Similar to the conventional bearing block, the inner peripheral surface of the shaft hole 4 is curved into a shape substantially corresponding to the outer peripheral surface of the bearing so as to receive the bearing (see FIG. 5). It is inserted into the bearing block 1 through the hole 30 and is taken out from the bearing block 1.

  The bearing block 1 is used by being fixed to the apparatus with the back surface 2 facing the wall surface 10 of the apparatus. As will be described later, the bearing block 1 of the present invention is particularly characterized by the shape of the back surface 2.

  The back surface 2 extends in a direction substantially perpendicular to the direction along the central axis C of the shaft hole 4 (that is, the axial direction of the bearing). Furthermore, a plurality of bolt holes 6a, 6b, 6c, 6d are formed in the back surface 2, and these bolt holes 6a, 6b, 6c, 6d are used as mounting members for mounting the bearing block 1 to the apparatus. It extends from the back surface 2 through the flange portion 3 to receive the bolt 5. In the present embodiment, a total of four bolt holes 6a, 6b, 6c, and 6d are provided at the corners of the back surface 2, but the number and arrangement of the bolt holes are not limited thereto. Moreover, the member received in bolt hole 6a, 6b, 6c, 6d may be other attachment members other than a bolt. In the present embodiment, the outer shape of the back surface 2 (that is, the outer shape of the flange portion 3) is substantially square, but the outer shape of the back surface 2 is not limited to a square. Other squares such as a rectangle and a rhombus, or a circle and an ellipse may be used.

  As shown in FIGS. 2 and 3, a protrusion 14 that forms a contact surface is provided around the shaft hole 4 in the back surface 2. Specifically, the protrusion 14 is formed continuously along the periphery of the shaft hole 4 with a slight gap from the edge of the shaft hole 4. In other words, a step portion 31 is formed between the edge portion of the shaft hole 4 and the protrusion 14, and the protrusion 14 is substantially from the position outside the step portion 31 in the radial direction with respect to the step portion 31. Projecting vertically. The extraction hole 30 is formed in the step portion 31. In this embodiment, the protrusion 14 has a flat upper surface 14a, and this upper surface 14a forms a contact surface that contacts the device wall surface 10 when the bearing block 1 is attached to the device wall surface 10 (FIG. 4, FIG. 5). That is, in the present invention, the “contact surface” means a surface which is a part of the back surface 2 and directly contacts the wall surface 10 when the bearing block 1 is attached to the apparatus wall surface 10.

  In the present embodiment, the protrusion 14 is continuously continuous so that the upper surface 14a, that is, the contact surface 14a is continuous along the periphery of the shaft hole 4, that is, over the entire circumferential direction of the shaft hole 4. Are provided continuously along the periphery of the shaft hole 4. However, the protrusion 14 and the contact surface 14 a may be formed intermittently along the periphery of the shaft hole 4, for example, may be formed at two positions symmetrical with respect to the shaft hole 4. In the present embodiment, the protrusion 14 is a substantially circular ring-shaped annular protrusion, but the outer shape of the protrusion 14 is not limited to a circle.

  Further, as shown in FIGS. 2 and 3, projections 16a, 16b, 16c, and 16d that form contact surfaces are provided around the bolt holes 6a, 6b, 6c, and 6d on the back surface 2. The protrusions 16a, 16b, 16c, and 16d have flat upper surfaces 26a, 26b, 26c, and 26d. Similar to the upper surface 14a of the protrusion 14, these upper surfaces 26a, 26b, 26c, and 26d form contact surfaces that directly contact the device wall surface 10 when the bearing block 1 is attached to the device wall surface 10 (FIGS. 4 and 4). 5). In this embodiment, the protrusions 16a, 16b, 16c, 16d are directly from the edge of the bolt holes 6a, 6b, 6c, 6d without being spaced from the edge of the bolt holes 6a, 6b, 6c, 6d. , Which extends in a direction substantially perpendicular to the back surface 2, but is formed at intervals from the edges of the bolt holes 6 a, 6 b, 6 c, 6 d, as with the protrusions 14 around the shaft hole 4. May be.

  In the present embodiment, the protrusions 16a, 16b, 16c, and 16d have the upper surfaces 26a, 26b, 26c, and 26d, that is, the contact surfaces 26a, 26b, 26c, and 26d respectively correspond to the corresponding bolt holes 6a, 6b, 6c, and 6d. Around the bolt holes 6a, 6b, 6c, 6d so that they extend continuously along the circumference of the bolt holes 6a, 6b, 6c, 6d. It is provided continuously along. However, the protrusions 16a, 16b, 16c, 16d and the contact surfaces 26a, 26b, 26c, 26d may be formed intermittently around the bolt holes 6a, 6b, 6c, 6d, for example, Each may be formed at two positions symmetrical with respect to the corresponding bolt holes 6a, 6b, 6c, 6d. In the present embodiment, the protrusions 16a, 16b, 16c, and 16d are substantially circular ring-shaped annular protrusions, but the outer shape of the protrusions 16a, 16b, 16c, and 16d is not limited to a circle.

  The upper surfaces 14a, 26a, 26b, 26c, and 26d of the protrusions 14, 16a, 16b, 16c, and 16d have the same axial distance D1 from the rear surface 2, but different axial distances depending on the shape of the apparatus wall surface 10. You may have. Moreover, the upper part of each protrusion 14, 16a, 16b, 16c, 16d does not necessarily need to form a flat upper surface, and may form a curved surface. In this case, the uppermost portion of each protrusion can have the same axial distance D1 from the back surface 2, but can have different axial distances depending on the shape of the apparatus wall surface 10.

  As described above, the bearing block 1 is fixed to the device wall surface 10 with the back surface 2 facing the device wall surface 10 by tightening the bolts 5 inserted into the respective bolt holes 6a, 6b, 6c, 6d. As shown in FIG. 5, when the bearing block 1 is fixed to the apparatus wall surface 10, projections 14, 16 a, 16 b formed around the shaft hole 4 and the bolt holes 6 a, 6 b, 6 c, 6 d on the back surface 2. Only the upper surfaces 14a, 26a, 26b, 26c, 26d of 16c, 16d are in contact with the apparatus wall surface 10. As a result, unlike the prior art, a gap is formed between the portion where the protrusion is not formed (in other words, the non-contact surface) and the device wall surface 10 in the peripheral portion of the back surface 2. This gap has an axial width corresponding to the axial distance D1 of the upper surfaces 26a, 26b, 26c, and 26d of the respective protrusions, and the corners where the protrusions 16a, 16b, 16c, and 16d on the back surface 2 are formed. Except for a certain depth D2 from the outer edge of the back surface 2 (FIGS. 3 and 5). The operator can easily pull out the bearing block 1 from the rotating shaft by inserting the claw of the extraction tool 20 into the gap formed between the peripheral edge of the back surface 2 and the apparatus wall surface 10 in this way (FIG. 6). ). 2 and 3, the above-described gap is formed not only at the upper and lower ends of the back surface 2 but also at the left and right ends, so that the nail of the extraction tool 20 is inserted into these left and right gaps. It is also possible to pull out the bearing block 1 by inserting. Note that the terms “upper”, “lower”, “left”, and “right” used in the present embodiment are merely used for convenience of explanation, and do not limit the scope of the present invention.

  Thus, when the bearing block 1 of this embodiment is attached to the apparatus wall surface 10, the projections 14, 16a, 16b, 16c formed around the shaft hole 4 and the bolt holes 6a, 6b, 6c, 6d, Only the upper surfaces (ie, contact surfaces) 14a, 26a, 26b, 26c, and 26d of 16d are in contact with the device wall surface 10, and the upper and lower (left and right) ends of the back surface 2 and the device wall surface 10 are excluded except for these contact surfaces. A gap is formed. Therefore, when it is necessary to remove the bearing block 1 such as when replacing the bearing, the operator inserts the claw of the extraction tool 20 into the gap from the top and bottom (left and right) directions of the bearing block 1 and the extraction tool 20 in the axial direction. The bearing block 1 can be easily pulled out of the rotating shaft simply by pulling. That is, unlike the prior art, there is no need to apply an impact force with a hammer to form a gap, so there is no possibility of damaging the bearing block 1 or the apparatus wall surface 10. In addition, since it is not necessary to perform an operation for forming a gap every time the bearing is replaced, the bearing can be replaced efficiently.

  In the present embodiment, the protrusions are formed around the bolt holes 6a, 6b, 6c, 6d and around the shaft hole 4. However, in the present invention, the protrusions are formed at least on the shaft hole 4 on the back surface 2. What is necessary is just to be formed in the circumference | surroundings. Thereby, a clearance gap can be formed between the peripheral part of the back surface 2 of the bearing block 1, and the apparatus wall surface 10, without impairing the stability of an attachment state. Further, when the bearing block 1 is attached to the apparatus wall surface 10, the periphery of the rotating shaft can be blocked from the external environment by the protrusions 14 formed around the shaft hole 4. As a result, it is possible to prevent the rotating shaft from being contaminated by foreign matter or water from the external environment, or from entering the bearing block 1 or the inside of the apparatus. However, if the protrusions are also formed around the bolt holes 6a, 6b, 6c, 6d as in the present embodiment, the protrusions 16a, 16b, 16c, 16d formed around the bolt holes 6a, 6b, 6c, 6d. Therefore, the surroundings of the bolt 5 can also be shielded from the external environment. Thereby, it can prevent that a rotating shaft and the volt | bolt 5 are contaminated by the foreign material, water, etc. from an external environment, or a foreign material, water, etc. penetrate | invade into the bearing block 1 or an inside of an apparatus. Moreover, since the back surface 2 contacts the apparatus wall surface 10 at the corner where the bolt holes 6a, 6b, 6c and 6d are located and at the center where the shaft hole 4 is located, the bearing block 1 is fixed in a more stable state. be able to. However, the protrusion does not need to be formed around all the bolt holes among the bolt holes 6a, 6b, 6c, and 6d, and may be formed around one or more of these bolt holes. You can also.

  Further, when the protrusions are formed around the bolt holes and the shaft holes, the protrusions 16a, 16b, 16c, and 16d formed around the bolt holes 6a, 6b, 6c, and 6d, as in this embodiment, It is preferable that the projections 14 formed around the shaft hole 4 are spaced from each other. Thereby, when the bearing block 1 is fixed to the apparatus wall surface 10, gaps are formed between the protrusions 16a, 16b, 16c, 16d around the bolt holes and the protrusions 14 around the shaft hole. Thereby, even if the bearing block 1 is used in a place where processing using water such as cleaning water and cooling water is performed, water flows down naturally through the gap, so that the bearing block and the apparatus wall surface There is no water in between. Therefore, generation | occurrence | production of rust etc. can be prevented.

  The size of each protrusion is not particularly limited as long as a gap of a size that allows the nail of the extraction tool 20 to be inserted can be formed between the apparatus wall surface 10 and the peripheral portion of the back surface 2.

  The mounting structure of the bearing block 1 (the shape of the back surface 2) generally has a hole that can accept a rod-shaped member in addition to the bearing block fixed to the apparatus wall surface, and is a surface perpendicular to the axial direction of the hole. It can apply widely also to the member fixed to an apparatus via this.

  The present invention is particularly applied to a flange-type bearing block fixed to a device wall surface.

It is a front view of the bearing block by one Embodiment of this invention. It is a rear view of the bearing block by one Embodiment of this invention. It is a perspective view of the bearing block by one Embodiment of this invention. It is a side view of the bearing block by one Embodiment of this invention, and shows the state by which the bearing block was fixed to the wall surface of the apparatus. It is sectional drawing of the bearing block shown in FIG. It is explanatory drawing which shows the process of extracting the bearing block of one Embodiment of this invention from a rotating shaft.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bearing block 2 Back surface 3 Flange part 4 Shaft hole C Center axis of shaft hole 5 Bolt 6a, 6b, 6c, 6d Bolt hole 7 Housing part 10 Apparatus wall surface 14, 16a, 16b, 16c, 16d Protrusion 14a, 26a, 26b, 26c, 26d Projection upper surface (contact surface)
20 Extractor 30 Extraction hole 31 Step

Claims (5)

A bearing block for holding a bearing, wherein the bearing block has a shaft hole that receives the bearing, and a protrusion that forms a contact surface is provided around the shaft hole on the back surface of the bearing block. Bearing block. The bearing block according to claim 1, wherein the contact surface of the protrusion provided around the shaft hole is continuous along the periphery of the shaft hole.   The bolt hole which penetrates the said back surface is formed in the said bearing block, The protrusion part which forms a contact surface is provided in the circumference | surroundings of the said bolt hole in the said back surface. Bearing block.   The bearing block according to claim 3, wherein the contact surface of the protrusion provided around the bolt hole is continuous along the circumference of the bolt hole.   5. The bearing block according to claim 3, wherein the protrusion provided around the shaft hole and the protrusion provided around the bolt hole are spaced apart from each other. 6. .

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