CN220043147U - Braking device and braking motor for braking a shaft - Google Patents

Abstract

The utility model relates to a braking device for braking a shaft, in particular for an electric motor, comprising a brake and a housing part, the brake being surrounded by the housing part in a housing-forming manner, ear regions protruding radially outwards and spaced apart from one another in the circumferential direction being formed on a braking surface part of the brake. The utility model also relates to a brake motor with a motor and a brake device.

Description

Braking device and braking motor for braking a shaft

Technical Field

The utility model relates to a braking device for braking a shaft, in particular for an electric motor, and to a braking motor having an electric motor and a braking device.

Background

It is generally known to provide a braking device for braking a shaft, in particular a rotor shaft of an electric motor of a brake motor.

Disclosure of Invention

The object of the present utility model is therefore to simultaneously achieve a safe and simple production method with a compact brake device.

According to the utility model, this object is achieved by a brake device having the following features.

In connection with the braking device, an important feature of the utility model is that the braking device, in particular for an electric motor, is arranged for braking the shaft,

wherein the braking device comprises a brake and a housing part,

wherein the brake has a lining carrier, in particular a brake pad carrier/brake lining carrier, which is connected to the shaft in a rotationally fixed manner and can be moved in the axial direction,

wherein an annular plate is fastened to an annular braking surface part of the brake,

wherein the electrical connection of the brake, in particular also at least by means of the annular plate, is spaced apart from the lining carrier, in particular axially,

wherein the annular plate is arranged radially within the braking surface part and/or the annular plate is surrounded radially by the braking surface part.

In this case, it is advantageous if the lug areas protrude radially on the braking surface part and are spaced apart from one another in the circumferential direction. The reaction torque of the brake is thus transmitted to the housing part via the lug region. That is, an annular gap is formed between the brake and the housing part, which annular gap is, however, interrupted several times, i.e. by the ear region.

In an advantageous embodiment, the annular plate has a radially outwardly projecting (i.e. in particular protruding) protective region/safety region which is arranged axially between the coupling line and the lining support and/or which separates the coupling line from the lining support. In this case, the protective region is advantageously embodied in a manner that bends to a lesser extent than the remainder of the annular plate. Thus, a high degree of safety can be achieved, since a wider circumferential angle range can be protected in the circumferential direction.

In an advantageous embodiment, the annular plate has two web regions spaced apart from one another in the circumferential direction, which project in the radial direction on the annular plate,

in particular, a threaded element which is screwed into a threaded bore of the brake surface part passes through the web region, and in particular a threaded element head of the threaded element presses the web region onto a projection which protrudes radially inwards on the brake surface part,

particularly wherein the tab regions are spaced apart from one another. The advantage here is that a stable fastening of the annular plate can be achieved.

In an advantageous embodiment, the end of the connecting wire is provided with a first core wire end sleeve/connection sleeve, in particular insulated,

the end of the supply line is provided with a second core wire end sleeve which is in particular insulated,

the first core wire end sleeve is connected, in particular plug-in connected, to the second core wire end sleeve. The advantage here is that a simple production can be achieved. This is because the supply line can first be guided through the cable nipple and then the brake can be pushed into the housing part. Thus, it is then possible to establish a connection of the axially protruding end of the coupling line with the end of the supply line.

In an advantageous embodiment, the area covered by the protected area in the circumferential direction comprises an area covered by two core wire end sleeves in the circumferential direction. This has the advantage that the core wire end sleeve is prevented from entering the travel range, i.e. the working range, of the lining support.

In an advantageous embodiment, the radial extent covered by the protection region comprises the radial extent covered by the two core wire end sleeves in the circumferential direction. The advantage of this is that the protective region is arranged at the same radial distance as the core wire end sleeve, so that the core wire end sleeve does not enter the working region of the lining support.

In an advantageous embodiment, the ring axis of the annular plate is coaxial with the axis of rotation of the shaft. The advantage here is that the shaft passes through the annular plate in the axial direction, so that the brake can be attached to the shaft in the axial direction and can be connected to the shaft. In particular, the lining carrier can be connected to the shaft in a rotationally fixed manner.

In an advantageous embodiment, the annular plate is designed flat. The advantage here is that it can be simply produced as a stamping.

In an advantageous embodiment, the brake and/or the braking surface part is surrounded by the housing part in such a way that a housing is formed. The advantage here is that explosion-proof embodiments can be easily realized.

In an advantageous embodiment, the braking surface part of the brake is formed with lug areas which protrude radially outwards and are spaced apart from one another in the circumferential direction,

wherein the ear region is connected to the housing part,

in particular, the lug areas are each screwed onto the housing part by means of a corresponding screw, in particular, the corresponding screw is screwed into a threaded bore of the housing part which is directed in the axial direction,

in particular, the radial direction is referenced to the axis of rotation of the shaft and/or the axial direction and the circumferential direction are referenced to the axis of rotation of the shaft. This has the advantage that in the event of a power failure, the brake automatically engages and only the coil needs to be energized to disengage the brake.

In an advantageous embodiment, the radially inwardly projecting lugs are spaced apart in the circumferential direction from the radially outwardly projecting lug areas. The advantage here is that the screw for fastening, which passes through the lug region and is screwed into the threaded bore of the brake surface part, does not touch/collide with the protective region.

In an advantageous embodiment, the braking surface part is connected to the magnet of the brake, wherein the coil which can be energized is received in an annular recess of the magnet,

wherein a spring element supported on the magnet is pressed onto a ferromagnetic armature plate arranged axially between the lining carrier and the magnet,

wherein the lining carrier is arranged axially between the armature plate and a braking surface formed on the braking surface part,

wherein the armature plate is arranged in a rotationally fixed but axially movable manner relative to the magnet, in particular by: so that a bolt fastened to the magnet passes through the armature plate in the axial direction,

in particular, the armature plate is moved against the spring force generated by the spring element when the coil is energized, and the spring element presses the armature plate against the lining carrier when the coil is not energized, so that the lining carrier is pressed against the braking surface of the braking surface part on its side facing away from the armature plate. This has the advantage that in the event of a power failure, the brake automatically engages. Thus improving safety.

In an advantageous embodiment, the radial extent covered by the housing part comprises or overlaps the radial extent covered by the detent and/or the ear region. The advantage here is that the lug region can be connected to the housing part by means of an axially directed screw element.

In an advantageous embodiment, the brake has an energizable coil, the connection line of which leads radially out of the brake and protrudes in the axial direction in an annular gap arranged between the brake and the housing part. The advantage of this is that the brake can be pushed into the housing part in the axial direction during production and only then the power supply line which protrudes in the radial direction through the housing part is connected to the coupling line of the brake.

In an advantageous embodiment, the connecting wire is provided with a first core wire end sleeve at its end projecting into the annular gap, the first core wire end sleeve being connected to the second core wire end sleeve in a plug-in manner. The advantage of this is that the supply line can be passed through the housing part before the brake is pushed in, and the connection line is not connected to the supply line until this time.

In an advantageous embodiment, the second core wire end sleeve is arranged at the respective end of the respective power supply line. The advantage here is that the first core wire end sleeve and the second core wire end sleeve can be connected in a simple manner by means of a plug connection.

In an advantageous embodiment, the power supply line passes through a cable bushing fitting which is screwed into a threaded bore of the housing part which extends through the housing part. The advantage here is that the power supply line is guided through the housing part in a sealing, in particular explosion-proof, manner by means of the cable nipple.

In an advantageous embodiment, the first core wire end sleeve is insulated, in particular wherein the outer surface of the first core wire end sleeve is surrounded by an insulating layer, in particular by an electrically insulating material. In this case, the advantage is that short-circuits can be avoided.

In an advantageous embodiment, the coil has two partial windings connected electrically in series with one another, wherein the center taps of the two partial windings and the two external connection terminals are led out as respective connecting lines, so that the number of connecting lines is three, in particular the number of supply lines is also three. The advantage here is that initially a current can be generated very rapidly in order to open the brake, wherein only one of the sub-windings is energized and thus a low inductance is provided. A smaller current can then be used to energize the entire coil.

In a brake motor having a motor and a brake device, an important feature is that,

the shell member is connected with a motor shell of the motor,

so that the housing part together with the motor housing forms a housing for the brake. The advantage here is that the brake motor can be implemented in an explosion-proof manner, since the brake is surrounded by an additional protective housing.

The present utility model is not limited to the above-described feature combinations. Other reasonable combinations of the above-described feature combinations and/or individual features and/or features to be described below and/or features of the drawings may be made available to the person skilled in the art, in particular from the objects proposed and/or by comparison with the prior art.

Drawings

The utility model is described in detail below with reference to the schematic drawings:

fig. 1 shows a first method step for producing a brake system of a brake motor according to the utility model, before a coil of the brake system, in particular an electrical connection of the brake coil, is connected to a power supply line, in a top view;

fig. 2 shows a second method step of the production, in which the electrical connection is connected to the power supply line;

the annular plate 4 of the braking device is shown in isolation in fig. 3;

fig. 4 shows a coupling line provided with a first core wire end sleeve 22 and a power supply line provided with a second core wire end sleeve 20 in an oblique view in a first viewing direction;

fig. 5 shows a coupling line provided with a first core wire end sleeve 22 and a power supply line provided with a second core wire end sleeve 20 in an oblique view in a second viewing direction;

fig. 6 shows in a side view that the connecting line provided with the first core wire end sleeve 22 and the power supply line provided with the second core wire end sleeve 20 are connected to each other.

List of reference numerals:

1. braking surface component

2. Screw element

3. Shell member

4. Annular plate

5 junction box seat and junction box lower part

6. Annular lining support

22. First core wire end sleeve

20. Second core wire end sleeve

21. Cable threaded sleeve joint

30. Tab area

31. Protection area

Detailed Description

As shown in the drawings, the brake device has a housing part 3 in which a brake is mounted. Preferably, the braking device is mounted to the motor for making an explosion-proof braking motor, or the braking device is mounted to other components, so that the braking device can be operated in an explosion-proof manner.

The brake has a braking surface part 1 with an opening extending axially therethrough. A shaft, not shown in the figures, in particular a rotor shaft, passes through the braking surface part 1.

The axial direction is parallel to the axis of rotation of the shaft. The radial direction and the circumferential direction are referenced to the axis of rotation of the shaft.

The shaft to be braked by the brake device passes through the opening.

The disk-shaped brake shoe holder has an internal toothing, which is fitted onto the annular driver with the internal toothing, so that the external toothing of the driver meshes with the internal toothing. The driver and the shaft are connected to each other in a rotationally fixed manner, in particular by means of a key connection.

The brake shoe holder is connected to the driver in a rotationally fixed manner and is arranged in a manner displaceable in the axial direction. The brake pad holder has brake pads on both axial sides or is made entirely of brake pad material, i.e. is made in one piece and/or in one piece of brake pad material.

The ferromagnetic armature plate is arranged in a rotationally fixed but axially movable manner relative to a magnet, which receives a coil in an annular recess of the magnet. Preferably, an axially directed pin passes through the armature plate, wherein the pin is connected to the magnet.

The magnet is preferably made of ferromagnetic material.

A spring element is supported on the magnet, which spring element presses against the armature plate.

In the axial direction, the armature plate is arranged axially between the brake pad carrier and the magnet.

The brake shoe holder is arranged axially between the armature plate and a braking surface machined on the braking surface part.

The braking surface part forms a housing together with the magnet, either directly or by means of an annular washer, which forms a housing for the coil, the armature plate, the spring element, the brake shoe carrier and the driver.

In order to create an explosion-proof design, the brake is mounted in the housing part 3. For this purpose, radially outwardly projecting lug areas spaced apart from one another in the circumferential direction are formed on the brake surface part 1, which lug areas are screwed to the housing part 3 by means of the respective screw elements 2.

The brake is thus arranged as a whole in the interior of the housing part 3, and the brake device can thus be implemented in an explosion-proof manner. Furthermore, the approximately redundant housing function of the housing part improves the housing-forming function of the brake, in particular, the brake is more safe.

The coil is embodied as a ring winding, the ring axis of which is parallel to the axial direction.

When the coil is energized, the armature plate is attracted toward the magnet against the spring force generated by the spring element, such that an axial gap is provided for the brake pad holder between the braking surface and the armature plate.

When the coil is not energized, the spring element presses the armature plate away from the magnet and thus presses the armature plate against the lining carrier. The armature plate presses the brake shoe carrier onto a braking surface formed on the braking surface part 1. In this case, the brake engages and generates frictional heat, which is mainly transferred to the housing member 3 via the braking surface member 1.

The brake is pushed into the housing part 3 in the axial direction.

The connecting wire of the coil, in particular the end region of the winding wire, is led radially out of the brake and in particular radially beyond the brake in the axial direction between the brake and the housing part 3.

As shown in fig. 1, the housing part 3 can be opened axially forward if the motor is not connected to the housing part or to other components.

The coupling line is not shown in fig. 1.

An annular gap is formed between the housing part 3 and the brake, which annular gap is interrupted in the circumferential direction by radially projecting lug areas of the brake surface part 1.

As shown in fig. 2, the coupling line is accessible from the axial direction, in particular from the viewing direction of fig. 1, since the coupling line protrudes from the annular gap in the viewing direction, in particular in the axial direction, from the braking surface part 1.

The end of the connecting wire is provided with a first core wire end sleeve 22, in particular insulated.

As shown in fig. 2, the cable sleeve joint 21 is screwed into a radially penetrating threaded bore of the housing part 3, wherein the power supply line, which is likewise provided with a core wire end sleeve 20 at the end, is passed through the cable sleeve joint from the outside by means of a cable threading tube and thus through the housing part.

As a final method step for producing the brake device, the first core wire end sleeve 22 is connected to the second core wire end sleeve 20, in particular insulated.

The upper terminal block part can be placed on the outside of the following surface areas of the housing part 3, namely: in this surface region, a threaded bore is arranged through into which the cable bushing connector is screwed, so that the power supply line does not lead directly into the external environment, but is electrically and mechanically connected to a terminal element arranged within the terminal box thus formed. The remaining supply lines are then led from these connection elements, in particular through the wall of the upper part of the connection box, into the external environment.

After mounting the motor to the housing part 3, the connection lines are no longer directly accessible from the outside.

The braking surface part 1 is hollow, i.e. in particular annular. The lining carrier 6 moves back and forth in the axial direction when the brake is disengaged or engaged. Since the core wire end bushings 20, 22 hang on the coupling and supply wires, there is a risk that the core wire end bushings 20, 22 enter into said axial travel region of the lining support 6. In order to prevent this risk, an annular plate 4 is provided.

The annular plate 4 is arranged radially inside the brake face member 1. In particular, the annular plate 4 is fastened to the brake surface part by means of axially oriented screws which extend through the annular plate 4, in particular through tab regions 30 which are spaced apart from one another in the circumferential direction and project radially outwards on the annular plate 4, the screws being screwed into threaded bores of projections which project radially inwards on the brake surface part 1. The annular plate 4 is thus arranged axially between the core wire end bushings 20, 22 and the lining support 6. The core wire end bushings 20, 22 are thus spaced apart from the lining support 6 by the annular plate 4.

The annular plate 4 has a radially raised protection area 31 in the circumferential angular region covered by the core wire end bushings 20, 22. The radial extent covered by the protected zone 31 includes the radial extent covered by the core wire end cannulae 20, 22. The protective region 31 separates the core wire end sleeves 20, 22 from the lining support 6.

The protective region 31 is spaced apart from the tab region 30 in the circumferential direction.

The annular gap is interrupted several times in the circumferential direction, i.e. by the ear region of the brake surface part 1.

The core wire end bushings 20, 22 are preferably fastened to the annular plate 4 by means of asbestos threads. In particular, for this purpose, the asbestos threads are wound around the annular plate 4 and the core wire end bushings 20, 22.

In a further embodiment according to the utility model, the braking surface part 1 is connected to a bearing end cap or a bearing flange, which receives a bearing, in particular a rolling bearing.

In particular, three connecting lines lead from the coil to the supply line, since the coil is embodied as a split winding. In this case, only the first partial winding of the coil is initially energized for switching off the brake, since a current can be generated more quickly due to the lower inductance. The first sub-winding and the second sub-winding connected in series therewith are then energized, wherein a lower current is sufficient to permanently open the brake due to the higher inductance of the two sub-windings connected in series.

Claims (21)

1. A brake device for braking a shaft, said brake device being for an electric motor,

the braking device has a brake and a housing member,

the brake has a lining carrier which is connected to the shaft in a rotationally fixed manner and can be moved in the axial direction,

it is characterized in that the method comprises the steps of,

an annular plate is fastened to the annular braking surface part of the brake,

the electrical connection of the brake is axially spaced from the lining carrier by means of an annular plate,

the annular plate is arranged radially within the braking surface part and/or the annular plate is radially surrounded by the braking surface part.

2. A brake arrangement for braking a shaft according to claim 1, wherein the lining support is a brake pad support.

3. A brake device for braking a shaft according to claim 1 or 2,

it is characterized in that the method comprises the steps of,

the annular plate has a radially outwardly projecting protective region which is arranged axially between the coupling line and the lining support and/or which separates the coupling line from the lining support.

4. A brake device for braking a shaft according to claim 1 or 2,

it is characterized in that the method comprises the steps of,

the annular plate has two tab regions spaced apart from each other in the circumferential direction, the tab regions protruding in the radial direction on the annular plate.

5. A braking apparatus for braking a shaft according to claim 4, wherein a screw threaded into the threaded bore of the braking surface part passes through the tab area, the screw head of the screw pressing the tab area against a radially inwardly projecting projection on the braking surface part.

6. A brake device for braking a shaft according to claim 1 or 2,

it is characterized in that the method comprises the steps of,

the end of the connecting wire is provided with a first core wire end sleeve,

the end of the power supply line is provided with a second core wire end sleeve,

the first core wire end sleeve is connected with the second core wire end sleeve.

7. The braking device for braking a shaft of claim 6 wherein the first core wire end sleeve is insulated and the second core wire end sleeve is insulated.

8. The braking device for braking a shaft of claim 6, wherein the first core wire end sleeve is plug-in connected with the second core wire end sleeve.

9. A brake device for braking a shaft according to claim 6,

it is characterized in that the method comprises the steps of,

the annular plate has a radially outwardly bulging protection zone,

the area covered by the protection area in the circumferential direction includes an area covered by two core wire end bushings in the circumferential direction,

and/or the number of the groups of groups,

the radial extent covered by the guard region in the radial direction includes the radial extent covered by the two core wire end sleeves in the radial direction.

10. A brake device for braking a shaft according to claim 1 or 2,

it is characterized in that the method comprises the steps of,

the ring axis of the annular plate is coaxial with the axis of rotation of the shaft,

and/or the number of the groups of groups,

the annular plate is designed to be flat.

11. A brake device for braking a shaft according to claim 1 or 2,

it is characterized in that the method comprises the steps of,

the brake and/or the braking surface part are surrounded by a housing part in such a way that a housing is formed.

12. A brake device for braking a shaft according to claim 1 or 2,

it is characterized in that the method comprises the steps of,

ear regions protruding radially outward and spaced apart from each other in the circumferential direction are formed on the braking surface part of the brake,

the ear region is connected to the housing member,

the radial direction is referenced to the axis of rotation of the shaft and/or the axial direction and the circumferential direction are referenced to the axis of rotation of the shaft.

13. A braking device for braking a shaft according to claim 12, characterized in that the ear areas are each screwed onto the housing part with a respective screw member which is screwed into an axially directed threaded hole of the housing part.

14. A brake device for braking a shaft according to claim 5,

it is characterized in that the method comprises the steps of,

ear regions protruding radially outward and spaced apart from each other in the circumferential direction are formed on the braking surface part of the brake,

the radially inwardly projecting lugs are spaced apart in the circumferential direction from the radially outwardly projecting ear regions,

and/or the number of the groups of groups,

the radial extent covered by the housing part comprises, or overlaps with the radial extent covered by the detent and/or by the ear region,

and/or the number of the groups of groups,

the brake has an energizable coil, the connection line of which leads radially from the brake and protrudes in the axial direction in an annular gap between the brake and the housing part.

15. A brake device for braking a shaft according to claim 6,

it is characterized in that the method comprises the steps of,

the power supply line passes through a cable nipple which is screwed into a threaded bore of the housing part which extends through the housing part.

16. A brake device for braking a shaft according to claim 7,

it is characterized in that the method comprises the steps of,

the outer surface of the first core wire end sleeve is surrounded by an insulating layer.

17. A brake device for braking a shaft according to claim 14,

it is characterized in that the method comprises the steps of,

the coil has two sub-windings electrically connected in series with each other, wherein the center taps of the two sub-windings and the two external connection terminals are led out as respective connection lines, so that the number of connection lines is three.

18. A braking device for braking a shaft according to claim 17, characterized in that the number of supply lines is also three.

19. A brake device for braking a shaft according to claim 14,

it is characterized in that the method comprises the steps of,

the braking surface part is connected to a magnet of the brake, wherein a coil which can be energized is received in an annular recess of the magnet,

the spring element supported on the magnet is pressed onto a ferromagnetic armature plate arranged axially between the lining carrier and the magnet,

the lining carrier is arranged axially between the armature plate and a braking surface formed on the braking surface part,

the armature plate is arranged in a rotationally fixed but axially movable manner relative to the magnet,

when the coil is energized, the armature plate moves against the spring force generated by the spring element toward the magnet, while when the coil is not energized, the spring element presses the armature plate against the lining carrier, so that the lining carrier is pressed against the braking surface of the braking surface part on its side facing away from the armature plate.

20. A braking device for braking a shaft according to claim 19, wherein the bolt fastened to the magnet passes through the armature plate in an axial direction.

21. A brake motor having a motor and a brake device for braking a shaft according to any one of claims 1 to 20,

it is characterized in that the method comprises the steps of,

the shell member is connected with a motor shell of the motor,

so that the housing part together with the motor housing forms a housing for the brake.