Rotating machine with brake

Abstract

To easily exchange a brake cover in a rotary machine with brake comprising the brake cover.SOLUTION: A rotary machine with brake comprises a brake part at an anti-load side of a rotary machine body, and a brake cover is provided for preventing intrusion of dust or moisture to the brake part. The brake cover is band-shaped from a rubber-based material and attached to the rotary machine body in a removable manner in a state where both ends are connected such that it is loop-shaped as a whole, and a connection portion is configured to be connected / disconnected by a connection mechanism.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] Embodiments of the present invention relate to a rotating machine with a brake, which includes a brake portion on the anti-load side of the rotating machine body.

Background Art

[0002] For example, as a rotating machine used in a hoist of an elevator device, a rotating machine with a brake having a disk-type brake portion on the anti-load side of the rotating machine body is adopted (see, for example, Patent Document 1). The brake portion includes a brake disk that rotates integrally with the rotation shaft of the motor, and an armature that moves by an electromagnet and a spring. Thus, when the electromagnet is de-energized, the armature presses the brake disk against the fixed portion of the main body, thereby locking the rotation shaft so that it cannot rotate, and thus holding the elevator car at the stop position. At this time, in order to prevent intrusion of water, dust, etc. into the brake portion, a cylindrical brake cover is provided so as to surround the periphery of the brake portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventionally, the brake cover is generally made of steel plate and attached to the frame of the rotating machine body by bolting at multiple points. Also, as in the above-mentioned Patent Document 1, mainly from the viewpoint of cost, the brake cover is made of a rubber-based material and both axial ends are fixed to the rotating machine body by a fastening band. Such a rubber brake cover has a relatively short service life and needs to be replaced during use, but it cannot be easily removed from the rotating machine body, and there is a problem that the replacement work is very difficult. In particular, in recent years, there has been a trend to eliminate large machine rooms in elevator devices, and there has been a situation where the work space for replacement cannot be secured. Therefore, the present invention provides a rotating machine with a brake that is provided with a brake cover and allows the brake cover to be easily replaced. [Means for solving the problem]

[0005] The brake-equipped rotating machine of this embodiment is equipped with a brake unit on the anti-load side of the rotating machine main body, and a brake cover to prevent dust and moisture from entering the brake unit. The brake cover is made of a rubber-based material in a band shape and is removably attached to the rotating machine main body with both ends connected so that the entire body is loop-shaped, and the connecting portion is configured to be able to be connected and disconnected by a connecting mechanism. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a perspective view of a brake-equipped rotating machine according to a first embodiment, taken from the rear side. [Diagram 2] FIG. 2 is an exploded perspective view of a rear portion of a rotating machine with a brake. [Diagram 3] Cross-sectional view of the rear part of a rotating machine with brake [Figure 4] FIG. 1 is a plan view showing a connecting mechanism of a brake cover; [Diagram 5] FIG. 11 is a plan view showing a connecting mechanism of a brake cover according to a second embodiment. [Figure 6]FIG. 13 is a perspective view of a brake cover according to a third embodiment. [Figure 7] FIG. 13 is a plan view of a main part of a brake cover according to a fourth embodiment. [Figure 8] FIG. 13 is a perspective view of a brake cover according to a fifth embodiment. [Figure 9] FIG. 13 is a perspective view of a brake cover according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, several embodiments of the present invention will be described with reference to the drawings, in which the present invention is applied to a permanent magnet synchronous motor with a disk brake used, for example, as a drive source for an elevator hoist. Since the configuration of the rotating machine body and the like is common among the several embodiments, the same parts are given the same reference numerals and detailed explanations and new illustrations are omitted.

[0008] (1) First embodiment A first embodiment will be described below with reference to Fig. 1 to Fig. 4. Fig. 1 shows a schematic external configuration of a brake-equipped rotating machine 1 according to this embodiment, and in Fig. 1 and Fig. 3, the right side is the front side, i.e., the load side, and the left side is the rear side, i.e., the anti-load side. Here, the brake-equipped rotating machine 1 is equipped with a disk-type brake unit 3 on the anti-load side of a rotating machine main body 2 consisting of a permanent magnet synchronous motor, i.e., on the left side in Figs. 1 and 3.

[0009] Although detailed illustration is omitted, the rotating machine main body 2 has metal motor brackets 5, 6 at both the front and rear ends of a frame 4 that is substantially rectangular in shape, and a rotating shaft 7 is rotatably supported by the motor brackets 5, 6 via bearings 8, as shown in FIG. 3, with only the rear side being shown. The motor bracket 6 has a rectangular outer shape, and a flange portion 6a is provided on the outer surface of its rear end. A stator is provided on the inner periphery of the frame 4, and a rotor is provided on the rotating shaft 7, positioned inside the stator. Although not shown, a hoist is connected to the front end, i.e., the load side end, of the rotating shaft 7, and the brake-equipped rotating machine 1 is configured to serve as the driving source for the hoist.

[0010] 2 and 3, the brake unit 3 includes a disk-shaped brake disc 9 and a braking mechanism 10. The brake disc 9 is attached so that its center is spline-engaged with the rear end portion of the rotating shaft 7, allowing it to move within a predetermined range in the axial direction and rotate integrally in the rotational direction. In addition, highly wear-resistant friction linings 11 are provided in annular shapes on both sides of the brake disc 9 near the outer periphery.

[0011] As is well known, the braking mechanism 10 is configured to include an electromagnet (not shown), an armature 12, a coil spring (not shown), and the like, housed in a rectangular box-shaped case 10a with an open front side. The electromagnet is fixedly provided in the case 10a at the rear of the brake disc 9, and the armature 12 is provided at the front side of the electromagnet and at the rear side of the brake disc 9, so as to be movable in the front-rear direction, i.e., in the axial direction. The coil spring is provided between the electromagnet and the armature 12, and is provided so as to bias the armature 12 forward, i.e., in the direction pressing the armature 12 against the brake disc 9. As shown in FIG. 2, the braking mechanism 10 is fixedly provided to the motor bracket 6 by a plurality of bolts 13.

[0012] As a result, when the electromagnet is energized, the braking mechanism 10 attracts the armature 12 rearward against the spring force of the coil spring, allowing the brake disc 9 and the rotating shaft 7 to rotate. When the electromagnet is de-energized, the spring force of the coil spring moves the armature 12 forward, pressing the brake disc 9 forward against the rear surface of the motor bracket 6. This applies a brake so that the brake disc 9 and therefore the rotating shaft 7 cannot rotate.

[0013] 2, a ring-shaped friction lining 14 is provided on the rear surface of the motor bracket 6 where the friction lining 11 comes into contact. An encoder (not shown) is provided in the center of the rear wall of the case 10a of the braking mechanism 10. Furthermore, although not shown, the brake unit 3 is also provided with a limit switch and the like.

[0014] In the brake-equipped rotating machine 1 of this embodiment, a brake cover 16 for preventing intrusion of dust and moisture into the brake unit 3 is provided so as to cover the gap between the rear end of the motor bracket 6 and the front end of the case 10a of the braking mechanism unit 10. This brake cover 16 is made of a rubber material, for example, ethylene propylene rubber or NBR, in the form of a strip with ends, i.e., a long thin plate of a constant width, and is detachably attached to the rotating machine body 2 with both ends connected so that the whole is in the form of a loop, in this case a rectangular frame.

[0015] At this time, the connecting portions at both ends of the brake cover 16 are configured to be connectable and disconnectable by a connecting mechanism. As shown in Fig. 4, in this embodiment, a well-known linear fastener 17 is used as the connecting mechanism, which extends in the width direction of the brake cover 16 and fastens both ends of the brake cover 16 so as to be openable and closable. As shown in Fig. 4, the linear fastener 17 is configured to include a number of teeth 19 attached to the sides of a cloth tape 18, for example, symmetrically in the drawing, and a slider 20 for fitting and disconnecting the teeth 19. The slider 20 is provided with a knob portion 20a. The linear fastener 17 is provided in a form in which the side of each tape 18 without the teeth 19 is bonded to both ends of the brake cover 16.

[0016] When mounting the brake cover 16 on the rotating machine body 2, the wire fasteners 17 are disconnected and both ends of the brake cover 16 are opened, and the brake cover 16 is positioned at the mounting location and wrapped around once. Then, both ends of the brake cover 16 are butted together, the wire fasteners 17 are aligned, and the slider 20 is operated to connect the wire fasteners 17. At this time, as shown in Fig. 3, the brake cover 16 is positioned so that both side edges straddle both sides of the outer periphery of the flange portion 6a of the motor bracket 6 and the outer periphery of the case 10a of the braking mechanism 10.

[0017] As a result, the brake cover 16 is attached so as to be tightly attached to the outer circumferential surface of the flange portion 6a of the motor bracket 6 and to the outer circumferential surface of the case 10a of the braking mechanism portion 10, due to the elasticity of the material of the brake cover 16 itself. In this state, the opening of the brake portion 3 is hermetically covered by the brake cover 16, preventing dust and moisture from entering the brake disc 9, armature 12, and limit switches and encoders (not shown). In addition, the brake cover 16 can be easily removed from the rotating machine body 2 by operating the slider 20 to separate the wire fasteners 17.

[0018] 1 etc., the brake cover 16 is provided so that the connecting portions at both ends, i.e., the wire fasteners 17, are located on the top surface of the rotating machine body 2. However, the brake cover 16 may be provided so that the wire fasteners 17 are located on either the left or right side surface or even on the bottom surface. In short, it is sufficient to arrange the wire fasteners 17 in a position that is most convenient for an operator to attach or remove the brake cover 16.

[0019] Next, the action and effect of the above configuration will be described. In the brake-equipped rotating machine 1 configured as above, by providing the brake cover 16 on the rotating machine body 2, it is possible to prevent the intrusion of dust and moisture into the brake unit 3, and to protect the brake unit 3 itself and the accessories arranged in the vicinity thereof. In this case, the brake cover 16 is made of a rubber-based material in a strip shape, so it is relatively inexpensive, has a high degree of freedom in shape, and also has excellent cooling properties for the inside of the brake unit 3.

[0020] The brake cover 16 is detachably attached to the rotating machine body 2 with both ends connected to form a loop, and the connected portions are configured to be connectable and disconnectable by linear fasteners 17 serving as a connecting mechanism. Therefore, the linear fasteners 17 make it easy to connect and disconnect the brake cover 16, simplifying the work of attaching and removing it from the rotating machine body 2. As a result, this embodiment provides the excellent effect of making it easy to replace the brake cover 16 when the brake cover 16 is provided.

[0021] Particularly in this embodiment, the connecting mechanism is configured to use line fasteners 17 that fasten both ends of the brake cover 16 in an openable and closable manner. This allows both ends of the brake cover 16 to be easily connected by closing the line fasteners 17, and allows both ends of the brake cover 16 to be easily separated by opening the line fasteners 17. Therefore, the functions required of the connecting mechanism can be achieved with a relatively simple and inexpensive configuration.

[0022] (2) Second and third embodiments 5 shows a second embodiment, in which the configuration of a connecting mechanism portion of a brake cover 21 for preventing intrusion of dust and moisture into the brake portion 3 differs from that of the first embodiment. That is, the brake cover 21 is also made of a rubber material, for example, ethylene propylene rubber or NBR, in the form of a strip with ends, i.e., a long thin plate of a constant width, and both ends are detachably connected to form a loop, which is attached to the rotating machine body 2. In this embodiment, the connecting mechanism is configured by providing a tab table structure 22 at both ends of the brake cover 21.

[0023] The tab table structure 22 is a structure in which a plurality of trapezoidal convex portions 22a, which become wider toward the tip side, and concave portions 22b, which are symmetrical thereto, are alternately provided in the width direction at the end of the brake cover 21, and the convex portions 22a and concave portions 22b, which are symmetrically provided at both ends of the brake cover 21, are fitted into each other to perform connection and disconnection. Even in this second embodiment, it is possible to easily connect and disconnect both ends of the brake cover 21, and it is possible to obtain the excellent effect that the brake cover 21 can be easily replaced even when the brake cover 21 is provided. In addition, since the tab table structure 22 is used as the connection mechanism, the function required of the connection mechanism can be realized with a relatively simple and inexpensive configuration.

[0024] FIG. 6 shows a third embodiment. In this third embodiment, as a configuration of a connecting mechanism part of the brake cover 31 for preventing intrusion of dust and moisture into the brake part 3, a configuration is adopted in which the brake cover 31 is fastened to each other and to the rotating machine body 2 by a plurality of fasteners. In this case, the brake cover 31 is also made of a rubber-based material in the shape of a strip with ends, i.e., a long thin plate with a constant width. And, four circular connecting holes 32 are provided at both ends of the brake cover 31, lined up on the left and right and the front and rear. These connecting holes 32 are provided so as to wrap when both ends of the brake cover 31 are overlapped to form a loop. Also, four circular connecting holes 33 are provided at the middle part of the brake cover.

[0025] Although not shown in the figure, the rotating machine main body 2, i.e., the motor bracket 6 and the braking mechanism 10, are provided with a number of circular studs that correspond to the connecting holes 32, 33. The brake cover 31 has both ends overlapped to form a loop as shown in the figure, and the connecting holes 32, 33 engage with the studs. Then, snap hooks as fasteners are fitted into the studs, so that the brake cover 31 is attached in a manner that prevents it from falling off. The brake cover 31 can be easily removed by removing the snap hooks from the studs.

[0026] According to the third embodiment, by using fasteners, both ends of the brake cover 31 can be easily joined together or attached to the rotating machine body 2, and both ends of the brake cover 31 can be easily detached from each other or from the rotating machine body 2. Therefore, similar to the first embodiment, etc., an excellent effect can be obtained in that the brake cover 31 can be easily replaced in a device provided with the brake cover 31. Furthermore, by using fasteners as the connecting mechanism, the function required of the connecting mechanism can be realized with a relatively simple and inexpensive configuration.

[0027] (3) Fourth to Sixth Embodiments and Other Embodiments 7, 8, and 9 show the fourth, fifth, and sixth embodiments, respectively. In these fourth to sixth embodiments, the brake cover is also made of a rubber-based material in a band shape, and both ends thereof are configured to be connectable and disconnectable by a connecting mechanism. As the connecting mechanism, for example, a configuration similar to that of the first embodiment or the second and third embodiments can be adopted. In these fourth to sixth embodiments, the following configuration is added to the brake cover.

[0028] That is, in the fourth embodiment shown in Fig. 7, a cutout 42 for internal inspection is provided in a part of the brake cover 41, located in the middle in the width direction and along the longitudinal direction, so as to be openable and closable by a vertical fastener 43. With this, the cutout 42 can be opened by opening the vertical fastener 43, and the inside of the brake section 3 can be visually inspected. The cutout 42 can be closed by closing the vertical fastener 43. The vertical fastener 43 can be easily opened and closed.

[0029] The fourth embodiment also has the excellent effect of allowing the brake cover 41 to be easily replaced, even when the brake cover 41 is provided. In addition, the interior of the brake unit 3 can be easily inspected by opening and closing the vertical fasteners 43. Since the brake cover 41 is made of a rubber material and has a strip shape, the vertical fasteners 43 can be easily installed.

[0030] In the fifth embodiment shown in FIG. 8, the brake cover 51 is provided with a tension adjustment mechanism for adjusting the tension of the brake cover 51 connected in a loop shape. Here, an adjuster 52 similar to that used for adjusting the length of a belt is used as the tension adjustment mechanism. This adjuster 52 also serves as a connecting mechanism. The adjuster 52 has a slightly horizontally elongated rectangular frame shape, and a first bar 52a and a second bar 52b are provided on the left and right sides in the figure, extending from front to back within the frame. Although not shown, a fine tooth portion for increasing friction is formed on the inner side of the frame part on the right side of the figure, that is, on the side facing the second bar 52b.

[0031] One end of the brake cover 51, i.e., the end on the left side in the figure, is turned from the lower left to the upper right side relative to the first bar 52a of the adjustment tool 52 and extends to the lower left again, and its upper surface is adhesively fixed to the lower surface of the brake cover 51. The other end of the brake cover 51, i.e., the end on the right side in the figure, is turned from the lower left to the upper right side relative to the second bar 52b of the adjustment tool 52 and extends to the lower right of the frame part on the right side in the figure of the adjustment tool 52, with the tip 51a becoming a free end and being positioned on the upper surface of the brake cover 51. At this time, the portion of the adjustment tool 52 at the other end of the brake cover 51 that contacts the frame part on the right side in the figure bites into the teeth, thereby maintaining the position.

[0032] With this configuration, by loosening the loop around the second bar 52b at the other end of the brake cover 51, the part extending from the adjuster 52 at the tip 51a of the brake cover 51 can be pulled out to the right in the figure or pushed in to the left in the figure. This makes it possible to adjust the tension of the brake cover 51. Therefore, in this fifth embodiment, the same actions and effects as those of the first embodiment can be obtained. In addition, by adjusting the tension of the brake cover 51, openings due to loosening and the intrusion of dust and the like can be prevented. After the brake cover 51 is loosely attached, it is also easy to increase the tension to make the brake cover 51 adhere closely to the rotating machine body 2.

[0033] In the sixth embodiment shown in FIG. 9, the outer surface of the brake cover 61 is provided with an uneven shape 62 for increasing the heat dissipation area. In this case, rectangular convex and concave portions are provided in two rows in a staggered pattern over the entire outer surface of the brake cover 61. In this sixth embodiment, the same actions and effects as those of the first embodiment can be obtained. In addition, by providing the uneven shape 62 on the outer surface of the brake cover 61, the effect of dissipating heat inside the brake portion 3 to the outside of the brake cover 61 can be improved, and the cooling performance is improved.

[0034] In the above embodiments, the present invention is applied to a motor for an elevator hoist, but it can be applied to a rotating machine with a brake for various purposes. Of course, the shape and structure of the rotating machine body can be modified in various ways. The position of the end of the brake cover, i.e., the position where the connecting mechanism is provided, is not limited to the top surface of the rotating machine body, but can also be on the left and right sides or the bottom surface. The cutout for internal inspection can also be provided on the top surface or left and right sides of the brake cover. The tension adjustment mechanism for adjusting the tension can also be configured in various ways, for example, like a belt buckle.

[0035] Although several embodiments have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0036] In the drawings, reference numeral 1 denotes a rotating machine with a brake, 2 denotes a rotating machine body, 3 denotes a brake section, 6 denotes a motor bracket, 6a denotes a flange section, 7 denotes a rotating shaft, 9 denotes a brake disc, 10 denotes a braking mechanism section, 16, 21, 31, 41, 51, and 61 denote brake covers, 17 denotes a line fastener (connecting mechanism), 22 denotes a tab table structure (connecting mechanism), 32 and 33 denote connecting holes, 42 denotes a notch section, 43 denotes a vertical fastener, 52 denotes an adjustment tool, and 62 denotes a concave-convex shape.

Claims

1. A rotating machine with a brake, the rotating machine being provided with a brake unit on the non-load side of a main body of the rotating machine, A brake cover is provided to prevent dust and moisture from entering the brake portion, The brake cover is made of a rubber material in a band shape and is detachably attached to the rotating machine body with both ends connected to form a loop, and the connected portion is configured to be connectable and disconnectable by a connecting mechanism, and both sides are disposed across the outer periphery of the rotating machine body and the outer periphery of the brake unit. Rotating machine with brake.

2. 2. The rotating machine with brake according to claim 1, wherein the connecting mechanism is formed of a wire fastener that fastens both ends of the brake cover so as to be able to open and close.

3. 2. The rotating machine with brake according to claim 1, wherein the connecting mechanism is configured by providing a tab table structure at both ends of the brake cover.

4. 2. The rotating machine with brake according to claim 1, wherein the connecting mechanism is configured to fasten both ends of the brake cover to each other or to the rotating machine body by a plurality of fasteners.

5. 5. The rotating machine with brake according to claim 1, wherein the brake cover is provided with a notch for internal inspection that can be opened and closed by a vertical fastener.

6. 6. The rotating machine with brake according to claim 1, further comprising a tension adjustment mechanism for adjusting the tension of the brake covers connected in a loop shape.

7. 7. The rotating machine with brake according to claim 1, wherein an outer surface of the brake cover is provided with projections and recesses for increasing a heat dissipation area.

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