Motorized drive system, use of the drive system for actuating a door, and method for producing a drive system

Abstract

Provided is a motorized drive system for actuating a door, including at least one gear having a spindle axis and a drive axis, wherein the gear assembly is designed to convert a rotational movement about the drive axis into a rotational movement about the spindle axis; at least one spindle assembly having a threaded spindle which can be rotated about a spindle axis, wherein the threaded spindle is mechanically coupled to a part of the gear assembly that can be rotated about the spindle axis, and at least one drive assembly for driving the threaded spindle with a drive shaft, wherein the drive shaft is mechanically coupled to a part of the gear assembly that can be rotated about the drive axis.

Claims

1. A motorized drive system, for actuating a door, comprising: a. at least one gear module with a spindle axis and a drive axis, the gear module being designed to translate a rotational movement about the drive axis into a rotational movement about the spindle axis; b. at least one spindle assembly with a threaded spindle rotatable about a spindle axis, the threaded spindle being mechanically coupled to a part of the gear assembly rotatable about the spindle axis; c. at least one drive assembly for driving the threaded spindle with a drive shaft, the drive shaft being mechanically coupled to a part of the transmission assembly rotatable about the drive axis, wherein the at least a drive assembly comprises: d. at least one motor assembly for driving a rotary movement of the threaded spindle about the spindle axis with a motor shaft rotatable about the drive axis and rigidly connected to the drive shaft and; e. at least one brake assembly arranged on a side of the motor assembly facing the transmission assembly for braking a rotary movement of the threaded spindle about the spindle axis with a brake shaft that is rotatable about the drive axis and connected rigidly with the motor shaft, the brake assembly comprising a hysteresis brake, f. wherein the motor assembly comprises an angular position sensor for measuring an angular position of the motor shaft relative to the motor assembly, wherein the angular position sensor is arranged on a side of the motor assembly facing away from the brake assembly, g. wherein the hysteresis brake comprises at least one rotor rigidly connected to the brake shaft and at least one stator arranged stationary at a housing of the brake assembly, the rotor comprising at least one permanent magnet for magnetizing the stator, or the stator comprising at least one permanent magnet for magnetizing the rotor.

2. The drive system according to claim 1, wherein the spindle axis and the drive axis are not arranged coaxially, and the drive assembly is arranged to the side of the spindle axis, wherein the spindle axis and the drive axis form an angle that amounts from one of 45° to 90°, from 60° to 90°, or 90°.

3. The drive system according to claim 1, wherein the angular position sensor comprises a Hall sensor.

4. The drive system according to claim 1, wherein the at least one gear assembly comprises a worm gear for translating a rotational movement about the drive axis into a rotational movement about the spindle axis, the worm gear comprising: a. a worm shaft rotatable about the drive axis) and mechanically coupled to the drive shaft; and b. a worm wheel rotatable about the spindle axis and mechanically coupled to the threaded spindle, the worm shaft being comprised by the drive shaft or rigidly or coaxially connected with a motor shaft of a motor assembly.

5. The drive system according to claim 1, wherein the rotor and the stator are arranged substantially cylindrically and coaxially to the brake shaft, the rotor being arranged in the stator and having a rotor length along the brake shaft and an outer rotor diameter orthogonal to the brake shaft, and the stator having a stator length along the brake shaft and an inner stator diameter orthogonal to the brake shaft, where the dimensions mentioned are in the following relationship to one another and have the following values: a. rotor length from one of 5 mm to 50 mm, 10 mm to 20 mm, or 12.5 mm; b. rotor outer diameter from one of 5 mm to 50 mm, from 10 mm to 20 mm, or 13.5 mm; c. stator length from one of 5 mm to 50 mm, from 10 mm to 20 mm, or 13 mm; and d. stator inner diameter from one of 5 mm to 50 mm, from 10 mm to 20 mm, or 14.5 mm.

6. The drive system according to claim 1, wherein the permanent magnet is made of a neodymium-iron-boron alloy and the rotor or the stator is made of an aluminum-nickel-cobalt alloy.

7. The drive system according to claim 1, comprising at least one clutch assembly for decoupling a rotational movement of the threaded spindle about the spindle axis from a rotational movement of a drive shaft about the drive axis, wherein the clutch assembly includes an overload clutch, for protecting a door actuated by the drive system or a connecting device of the drive system to the door against overload.

8. Use of a drive system according to claim 1 for actuating a door.

9. A production method for of a drive system, according to claim 1, comprising the following steps: a. applying an adhesive to a brake shaft or a rotor for a hysteresis brake for the drive system; b. attaching the rotor directly to the brake shaft; and c. cohesive connecting of the rotor to the brake shaft by the adhesive.

Description

BRIEF DESCRIPTION

(1) Some of the embodiments will be described in detail, with reference to the following figures, wherein like designations denote like members, wherein:

(2) FIG. 1a is a schematic drawing of a drive system according to embodiments of the invention;

(3) FIG. 1b is a schematic drawing of a drive system according to embodiments of the invention;

(4) FIG. 2 shows a schematic drawing of a further drive system according to embodiments of the invention;

(5) FIG. 3 shows a schematic sectional drawing of a drive assembly according to embodiments of the invention;

(6) FIG. 4 shows a schematic sectional drawing of a further drive assembly according to embodiments of the invention;

(7) FIG. 5 shows a schematic sectional drawing of a further drive assembly according to embodiments of the invention;

(8) FIG. 6 shows a schematic sectional drawing of a brake assembly according to embodiments of the invention;

(9) FIG. 7 shows a schematic sectional drawing of a further drive system according to embodiments of the invention;

(10) FIG. 8a is a schematic representation of a rotor according to embodiments of the invention on a brake shaft;

(11) FIG. 8b is a schematic representation of a rotor according to embodiments of the invention on a brake shaft;

(12) FIG. 9a is a schematic representation of a stator according to embodiments of the invention;

(13) FIG. 9b is a schematic representation of a stator according to embodiments of the invention; and

(14) FIG. 10 is a schematic representation of a method according to embodiments of the invention.

DETAILED DESCRIPTION

(15) FIG. 1 shows a schematic drawing of a drive system 100 according to embodiments of the invention as a side view (FIG. 1a) and as a section (FIG. 1b) in the plane B-B marked in FIG. 1a. The drive system 100 shown comprises a spindle assembly 110 and a drive assembly 200, which are connected to one another by a gear assembly 220. The spindle assembly 110 comprises a threaded spindle (not shown) rotatable about a spindle axis SA and the drive assembly 200 comprises a drive shaft 201 rotatable about a drive axis AA. The threaded spindle and the drive shaft 201 are mechanically coupled to one another, for example, via the gear assembly 200, the gear assembly 220 being designed to translate a rotational movement about the drive axis AA into a rotational movement about the spindle axis SA.

(16) The drive assembly 200 shown comprises a motor assembly 210 for driving a rotary movement of the threaded spindle about the spindle axis SA and a brake assembly 230 arranged on a side of the motor assembly 210 facing the gear assembly 220 for braking a rotary movement of the threaded spindle about the spindle axis SA. The transmission assembly 220 is arranged, for example, between the motor assembly 210 and the brake assembly 230

(17) In the example shown, the drive axis AA and the spindle axis SA are not arranged coaxially and form an angle α, which is, for example, 90°. A supply line 130, in particular for supplying the drive system 100 with energy and/or control signals, is arranged, for example, at the drive assembly 200. A connection device 120 is arranged, for example, at the ends of the drive system 100 along the spindle axis SA. The connection devices 120, which can each comprise a ball stud, for example, can be designed, for example, to connect the drive system 100 to a vehicle (not shown) and a vehicle door (not shown) of the vehicle, for actuation of which the drive system 100 is provided.

(18) FIG. 2 shows a further drive system 100 according to embodiments of the invention as a section as in FIG. 1b. In contrast to the drive system 100 shown in FIG. 1, in the drive system 100 shown in FIG. 2, the brake assembly 230 is arranged between the motor assembly 210 and the transmission assembly 220.

(19) FIG. 3 shows a schematic sectional drawing of a drive assembly 200 according to embodiments of the invention. The illustrated drive assembly 200 comprises a motor assembly 210 for driving a rotary movement of a threaded spindle (not shown) about a spindle axis SA with a motor shaft 211 rotatable about a drive axis AA.

(20) The drive assembly 200 shown comprises a brake assembly 230 for braking a rotary movement of the threaded spindle about the spindle axis SA with a brake shaft 231, which can be rotated about the drive axis AA and is guided, for example, by a bearing 235. The brake assembly 230 includes a hysteresis brake 237, for example. The brake shaft 231 is, in particular rigidly, connected to the motor shaft 211, for example via a worm shaft 222 of a transmission assembly 220, the brake shaft 231, worm shaft 222 and motor shaft 211 advantageously being arranged coaxially to one another and/or forming together a drive shaft 201 of the drive assembly 200.

(21) In the example shown, the motor assembly 210 and the brake assembly 230 are arranged on opposite sides of the spindle axis SA and the transmission assembly 220.

(22) The illustrated motor assembly 210 includes an angular position sensor 213, in particular a Hall sensor, for measuring an angular position of the motor shaft 211 relative to the motor assembly 210, the angular position sensor 213 being arranged, for example, on a side of the motor assembly 210 facing away from the brake assembly 230.

(23) FIG. 4 shows a schematic sectional drawing of a further drive assembly 200 according embodiments of to the invention. The illustrated drive assembly 200 differs from the drive assembly 200 shown in FIG. 3 in that the brake assembly 230 is arranged between the motor assembly 210 and the transmission assembly 220.

(24) FIG. 5 shows a schematic sectional drawing of a further drive assembly 200 according to embodiments of the invention. The drive assembly 200 shown comprises, like the drive assembly 200 shown in FIG. 4, a motor assembly 210 with a motor shaft 211 rotatable about a drive axis AA and an angular position sensor 213. A supply line 130 for supplying the motor assembly 210 with energy and/or control signals is also shown.

(25) In the example shown, the motor shaft 211 is directly and rigidly connected to a brake shaft 231 of a brake assembly 230, which can be rotated about the drive axis AA, on the side of the motor assembly 210 facing away from the angular position sensor 213, for example by the motor shaft 211 being inserted coaxially in a recess 212 in the brake shaft 231 and press-fitted to it.

(26) A, in particular cylindrical, rotor 232 is attached to the illustrated brake shaft 231, for example coaxially to the brake shaft 231. The rotor 232 shown, which comprises, for example, a permanent magnet, is arranged, in particular coaxially, in a, for example cylindrical, stator 233, which can be magnetized by the rotor 232. The rotor 232 and the stator 233 form a hysteresis brake together.

(27) FIG. 6 shows a schematic sectional drawing of a brake assembly 230 according to embodiments of the invention. The brake assembly 230 shown comprises a brake shaft 231 which is rotatable about a drive axis AA and is guided by a bearing 235. The brake shaft 231 shown is rigidly connected to a worm shaft 222 of a gear assembly (not shown), for example it is formed integrally therewith. The illustrated brake assembly 230 comprises a rotor 232 and a stator 233, which form a hysteresis brake together and can be arranged and configured as shown in FIG. 3, with the difference that in FIG. 4 the rotor 232 is spaced apart from the brake shaft 231 by a spacer 234. The spacer 234, for example made of a polymer, is shaped in the example shown in such a way that the spacer 234 spaces the rotor 232 apart from the brake shaft 231 and the bearing 235. The brake assembly 230 shown is enclosed by a housing 236, which is composed, for example, of two plastic half-shells.

(28) FIG. 7 shows a schematic sectional drawing of a further drive system 100 according to embodiments of the invention. Components that are already shown in FIG. 1 are provided with the same reference numerals as there and are not described again. The spindle assembly 110 shown comprises a guide bushing 112 for guiding a threaded spindle (not shown). In the example shown, the threaded spindle, which can be rotated about a spindle axis SA, is mechanically coupled to a worm wheel 223 of a worm gear 221 via a clutch assembly 240, for example with an overload clutch. The worm wheel 223 shown is mechanically coupled to a worm shaft (not shown) of the worm gear 221, the worm shaft being rotatable about a drive axis AA and, in particular rigidly and/or coaxially, connected to a motor shaft 211 of a motor assembly 210. Both the threaded spindle and the worm shaft can each be mounted on at least one bearing 235. In the example shown, the angle α enclosed by the spindle axis SA and the drive axis AA is approximately 75°.

(29) FIG. 8 shows a schematic illustration of a rotor 232 according to embodiments of the invention on a brake shaft 231 as a section along the drive axis AA (FIG. 8a) and as a perspective illustration (FIG. 8b). The rotor 232 is glued directly to the brake shaft 231, for example. The rotor 232 shown is cylindrical and has, for example, a rotor length RL of 12.5 mm, an inner rotor diameter RID of 5.95 mm and/or an outer rotor diameter RAD of 13.5 mm. The rotor 232 can for example consist of a neodymium-iron-boron alloy, in particular with a nickel-copper coating.

(30) The brake shaft 231 has, for example, a section 239 for the connection with a worm shaft of a gear assembly (not shown) with a positive connection with respect to a rotation about the drive axis AA. Section 239 is designed, for example, as a gearwheel.

(31) The brake shaft 231 can be hollow, at least in sections, so that a motor shaft of a motor assembly (not shown) and/or a worm shaft of a transmission assembly (not shown) can be at least partially inserted into the brake shaft 231 and press-fitted to it, for example.

(32) FIG. 9 shows a schematic illustration of a stator 233 according to embodiments of the invention as a section along the drive axis AA (FIG. 9a) and as a perspective illustration (FIG. 9b). The stator 233 shown is essentially cylindrical and has, for example, a stator length SL of 13 mm, a stator inner diameter SID of 14.5 mm and/or an outer stator diameter of 23 mm. The stator 233 can consist, for example, of an aluminium-nickel-copper alloy.

(33) The stator 233 shown has a number of, for example two, recesses 229 for connecting the stator 233 with a housing of a brake assembly (not shown) in a form-locking manner with respect to a rotation about the drive axis AA.

(34) FIG. 10 shows a schematic illustration of a production method 300 according to embodiments of the invention for a drive system 100. The production method 300 initially comprises applying 310 an adhesive to a brake shaft 231 and/or a rotor 232 for a hysteresis brake 237 for the drive system 100. For example, the next step is attaching 320 the rotor 232 directly to the brake shaft 231, for example by pushing the rotor 232 coaxially onto the brake shaft 231. For example, in the following step, there is a cohesive connecting 330 of the rotor 232 to the brake shaft 231 by means of the adhesive. The further manufacture of the hysteresis brake and the drive system can take place, for example, using customary manufacturing methods.

(35) Although the invention has been illustrated and described in greater detail with reference to the preferred exemplary embodiment, the invention is not limited to the examples disclosed, and further variations can be inferred by a person skilled in the art, without departing from the scope of protection of the invention.

(36) For the sake of clarity, it is to be understood that the use of “a” or “an” throughout this application does not exclude a plurality, and “comprising” does not exclude other steps or elements.

REFERENCE SIGN LIST

(37) 100 Drive system 110 Spindle assembly 112 Guide bushing 120 Connection device 130 Supply line 200 Drive assembly 201 Drive shaft 210 Motor assembly 211 Motor shaft 212 Recess 231 Angular position sensor 220 Gear assembly 221 Worm gear 222 Worm shaft 223 Worm wheel 229 Recess 230 Brake assembly 231 Brake shaft 232 Rotor 233 Stator 234 Spacer 235 Bearing 236 Housing 237 Hysteresis brake 239 Section 240 Clutch assembly 300 Production method 310 Applying 320 Attaching 330 Connecting RAD rotor outer diameter RID rotor inner diameter RL rotor length SAD stator outer diameter SID stator inner diameter SL stator length AA drive axis SA spindle axis α angle