JP2002528025A - Drive - Google Patents

Abstract

(57) [Summary] Driving devices (10, 10a, 10b, 10c, 10d) having one sun gear formed as stators (12, 12a, 12b, 12c) have been proposed. A plurality of grooves (18, 18c) are formed in the longitudinal direction. The grooves (18, 18c) form a pair of mutually facing web-like poles (20), around which a feedable winding (22) is arranged. ing. The drive (10, 10a, 10b, 10c, 10d) has at least one planetary gear formed as a rotor (36, 36a, 36b) and at least a rotatable one of the at least one rotor (36, 36a, 36b). At least one component (28, 28a, 28b, 40, 54) for supporting the vehicle. The gist of the present invention is to combine the electric motor and the circulating gear transmission into one drive device (10, 10a, 10b, 10c, 10d). This brings the two components together and saves construction space, weight and cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a driving device. Drives consisting of electric motors, in particular reluctance motors, and flanged transmissions are known. That is, the known driving device is composed of two components. This means that the device requires a relatively large amount of construction space and has a corresponding weight.

[0002] Further, in an electric motor, a loss is caused by a gap between a stator and a rotor, and this loss adversely affects efficiency and, consequently, output.

The drive according to the characterizing part of claim 1 has the advantage over this that the electric motor and the gear transmission are integrated into one component. This requires less structural space and weight.

As the area through which the magnetic flux passes increases and the gap decreases, the efficiency of the drive is significantly improved compared to conventional electric motors.

[0005] A good circulating movement is obtained if the non-magnetizable material is arranged in the pole grooves so that the stator has teeth on the entire circumferential surface cooperating with at least one rotor. This good circulating motion can be further improved by arranging a plurality of rotors in a ring chamber formed by the stator and the components and providing the components with teeth that mesh with the rotor having the teeth.

[0006] Since the component teeth, the stator teeth and the rotor teeth extend parallel to the stator axis and the components project from the drive so as to be able to pick up the torque, a simple form is achieved. Thus, a planetary gear transmission with an electric motor can be realized.

[0007] If the tooth row of the component, the tooth row of the stator and the tooth row of the rotor extend helically with respect to the stator axis, this corresponds to a spin-dell transmission with an electric motor, which is a one-dimensional motion. For this purpose, a rotor or a component is used.

[0008] The teeth rows of the stator can be formed on the inner and outer peripheral surfaces of the stator, thereby realizing an inner circulation type and an outer circulation type device, respectively.

A particularly simple configuration can be obtained by the following means. That is, the rotor is provided, and the component is formed as a shaft that is rotatably disposed in a longitudinal hole provided in the center of the rotor and is bent at a right angle, and the shaft projects from the rotor. At its end it has two parallel webs which are arranged perpendicular to the shaft and which reach the centerline of the stator and which have a shaft section formed in the web, , Which protrude longitudinally from the drive and are rotatably mounted on the drive.

[0010] Another advantage and another advantageous embodiment are obtained by the measures as claimed in claim 2.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the invention and is described in detail below.

FIG. 1 is a simplified front view of the driving device.

FIG. 2 is a detailed view showing a part of FIG. 1 having a first dentition type.

FIG. 3 is a left side view of FIG. 1 having a second dentition type and a first bearing type.

FIG. 4 is a left side view of FIG. 1 having a dentition type and a second bearing type according to FIG.

FIG. 5 is a simplified front view of a modified embodiment of the driving device.

FIG. 6 is a simplified front view of another variation of the driving device.

FIG. 7 is a right side view of FIG.

FIG. 1 shows a driving device 10. The drive 10 has a sun gear formed as a stator 12. The stator 12 is preferably formed as a laminated iron core. As viewed in the longitudinal direction of the drive 10, ie in the direction of the stator axis 14, six swallow-tailed grooves 18 are formed on the inner peripheral surface 16 of the stator 12 at equal intervals, and these grooves 18 have a diameter Three groove pairs 18 'facing each other above,
18 ", 18"". These six grooves 18 form six web-shaped poles 20 which themselves are diametrically opposed to each other.
Two pole pairs 20 ', 20 ", 20"'. Pole pairs 20 ', 20''
, 20 "", a powerable winding 22 is arranged around each pole 20. Thus, the stator 12 of the drive device 10 has a so-called reluctance motor stator structure. Therefore, pole pairs 20 ', 20'', 2
The 0 '''windings 22 are adapted to be fed to one another in a known manner to generate a rotating magnetic field. Advantageously, the groove 18 is provided so that the tooth row 26 is also provided on the entire inner peripheral surface 16 of the stator 12, i.e. where it is interrupted by the groove 18.
A non-magnetizable material 24 is disposed therein. The material 24 is, for example, plastic or resin, and is cast into the stator 12 after the winding 22 is attached. Tooth row 2
6 is produced, for example, during casting of the stator 12 by guiding a correspondingly shaped tool having the shape of a tooth row 26 into the stator 12. The tooth row 26 can also be manufactured by cutting after casting.

The drive 10 has a component 28 rotatably supported by the drive 10 in a longitudinal direction of the drive 10 or concentrically with the stator 12 in alignment with the stator axis 14. The outer peripheral surface 30 of the component member 28 has a tooth row 32. The component member 28 has a function of a driving member. The component 28 protrudes from the driving device 10, and has a shape of a driven shaft outside the driving device 10, so that torque can be picked up by the component 28. In this case, the mounting of the component 28 takes place in a known manner at the housing part (not shown) of the drive device 10, for example at the front and rear flanges. The component member 28 and the inner peripheral surface 16 of the stator 12 form a ring chamber 34. In the ring chamber 34 are arranged four planetary gears formed as rotors 36, but other numbers of gears are possible. The four rotors 36 form two rotor pairs 36 ', 36 "that are diametrically opposed to each other. The teeth 32 of the component 28 mesh with the external teeth 37 of the rotor 36, which also serves to rotatably support the rotor 36. Here, the non-magnetizable material 2 is placed in the groove 18.
It is also clear that providing 4 is advantageous. This is because this causes the stator 12 to have the teeth 26 on the entire inner peripheral surface 16 cooperating with the rotor 36, so that the rotational movement of the driving device 10 is improved. Rotor 36 is end face 38
The rotor 36 can also be connected to a ring 40, which is shown in broken lines, so as to be supported by This allows for an embodiment that does not use the material 24.

As is evident from FIG. 2, the teeth 26 of the stator 12, the teeth 32 of the component 28, and the external teeth 37 of the rotor 36 extend in the longitudinal direction of the drive 10 or parallel to the stator axis 14. Extending.

When a current flows through the windings 22 of the pole pairs 20 ′, 20 ″, 20 ′ ″, a magnetic field is formed, which exerts a force on each member made of a material responsive to the magnetic field.
As is common in, for example, reluctance motors, a corresponding current flow through winding 22 produces a rotating magnetic field that rotates rotor pair 36 ', 36 ".

When the planetary gear formed as the rotor 36 moves, the planetary gear rotates counterclockwise by its external teeth 37 along the teeth 26 formed on the inner peripheral surface 16 of the stator 12. Then, it moves toward the pole 20. The rotational movement of the rotor 36 caused by the rotation of the magnetic pull of the poles 20 also forces the component 28 to rotate, as in a planetary gear transmission. As the rotor 36 rolls clockwise along the teeth 26 of the stator 12, the rotor 36 rotates counterclockwise about its own longitudinal axis. Thereby, the component member 28 rotates clockwise. The rotational movement and the transmittable torque of the component 28 are picked up in a known manner at the end of the component 28 projecting from the drive 10 and formed as a shaft end.

The drive device 10 in FIGS. 1 and 2 combines a gear circulation transmission in the form of a planetary gear transmission and an electric motor, in particular a reluctance motor. Thus, instead of using an electric motor and a flanged gear set in this way, it is possible to use only one component, thereby saving construction space, weight and cost. be able to. The meshing of the teeth 37 of the rotor 36 with the teeth 26 of the stator 12 increases the effective surface area between the rotor 36 and the stator 12, thereby improving the efficiency and, consequently, the output. The required transmission is as simple as a circulating gear transmission, with the stator 12, component 2
8 and the diameter of the rotor 36.

FIG. 3 shows the driving device 10a. In this case, the toothing 26a of the stator 12a, the toothing 32a of the component 28a, and the toothing 37a of the rotor 36a correspond to the driving device 10 or the stator. It is provided spirally in the longitudinal direction of the axis 14. In this case, the component member 28a is fixed in the axial direction according to the load, for example, by one or two ball bearings 42, one of which is shown as a symbol in FIG. The component 28a is used in this case only to support the rotor 36a. The rotor 36a is movable in the axial direction, and is rotatably supported by a bar 44 projecting beyond the driving device 10a. A plate 46 is provided at an end of the bar 44 located outside the driving device 10a. Such plates 46 may be provided at both ends of the bar 44 when both ends of the bar 44 protrude from the driving device 10a. The bar 44 is slidably supported in the axial direction. When the rotor 36a rotates about its own axis, the bar 44, the bar 44 slides axially. Through the plate 46, a tensile force and a compressive force can be obtained. In this way, the driving device 10a functions as an insertable adjusting member like a spindle transmission. For the required stroke, the lengths of the stator 12a, the component 28a and the rotor 36a must be adapted to one another. The effective stroke substantially corresponds to the length of the rotor 36a excluding the length of the casing of the drive device 10a.

FIG. 4 shows a driving device 10b similar to the driving device 10a. The difference between the two driving devices is that in the case of the driving device 10b, the component member 28b is movable in the axial direction, and the rotor 36b is fixed in the axial direction. Rotor 36b
Are preferably axially fixed via ball bearings 48, but other bearing methods are also suitable. This allows the rotor 36b to rotate about its own axis and also to circulate along the teeth 26b of the stator 12.

The constituent member 28b protrudes from the driving device 10b. The effective stroke substantially corresponds to the length of the component member 28b excluding the length of the casing of the driving device 10b. The component 28b is used in this case for bearing the rotor 36b and for transmitting the outward pulling and compression forces. For this purpose, one or both ends of the component 28b are preferably formed analogously to the shaft of a spindle transmission known per se.

The driving device 10c shown in FIG. 5 is of an outer circulation type. The stator 12c is star-shaped, with six poles 20c projecting outwardly to form three diametrically opposed pole pairs 20c ', 20c ", 20c". The groove 18c between the poles 20c is provided with a similarly non-magnetizable material 24c.
The tooth row 26c of the stator 12 is formed on the outer peripheral surface 50 of the stator 12. On the outer peripheral surface 50, four rotors 36 are arranged symmetrically, as the case may be.
Two diametrically opposite rotor pairs 36 ', 36 "are formed. The rotors 36 are connected to each other at one end surface 38 via one ring 40. This ring is used to support the rotor 36, and it is also possible to pick up torque in this ring.

FIGS. 6 and 7 show a driving device 10 d, in this case, the driving device 1 d.
0 stator 12 is used. Only one rotor 52 having an external tooth row 53 is provided, and the external tooth row 53 is defined so as to mesh with the tooth row 26 of the stator 12. The components used to support the rotor 52 and transmit the torque are formed as right-angled shafts 54. The shaft 54 is
It is rotatably arranged in a longitudinal hole 56 provided at the center of the rotor 52.
At the end of the shaft 54 projecting from the rotor 52, two parallel webs 58
The web 58 is arranged perpendicular to the shaft 54 and reaches the stator axis 14. The web 58 is formed with a shaft section 60 projecting longitudinally from the drive 12c. Shaft division 6
0 is rotatably supported via a bearing 62 of the drive device 12d. Web 5
8 can also be screwed onto the shaft 54 and the shaft section 60, for example. This driving device 10d has a particularly simple configuration.

Of course, the invention is not limited only to the above-described drive and its variants. Instead of a torque-transmitting portion (bound by shape) by the tooth rows 26, 37a, 53 of the driving devices 10, 10c, 10d, a friction-connecting (bound by friction) transmitting portion is provided by a friction wheel, for example. It is also possible. The gist of the present invention is that the electric motor and the circulating gear transmission are combined into one drive device. For this purpose, the sun gear must be formed mainly as the stator of an electric motor, in particular a reluctance motor, and the at least one planetary gear as a rotor, in which case at least one component supporting at least one rotor is provided. Must be provided. It is conceivable to provide additional windings on the rotor, but this increases the cost of electrically connecting the windings.

[Brief description of the drawings]

FIG. 1 is a simplified front view of a driving device.

FIG. 2 is a detailed view showing a part of FIG. 1 with a first dentition type;

FIG. 3 is a left side view of FIG. 1 with a second dentition type and a first bearing type.

FIG. 4 is a left side view of FIG. 1 with a tooth type and a second bearing type according to FIG. 3;

FIG. 5 is a simplified front view of a modified embodiment of the driving device.

FIG. 6 is a simplified front view of another modified embodiment of the driving device.

FIG. 7 is a right side view of FIG.

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] March 14, 2000 (2000.3.14)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (10)

[Claims] In a driving device (10, 10a, 10b, 10c, 10d) provided with sun gears formed as stators (12, 12a, 12b, 12c), a plurality of longitudinal grooves (18, 18c) are provided. ) And a pair of mutually facing web-like poles (20) are formed, and a winding (22) capable of supplying power is arranged around the poles (20), and a rotor (36) is formed. , 36a, 36b) and at least one rotor (36, 3).
6a, 36b) at least one component (28, 28a, 28b, 40, 54) for at least rotatably mounting the drive. 2. A circumferential surface (16, 50) in which a stator (12, 12a, 12b, 12c) cooperates with a tooth row (37, 37a, 53) of at least one rotor (36, 36a, 36b). The drive (10, 10a) according to claim 1, wherein a non-magnetizable material (24) is arranged in the groove (18, 18c) so as to have a tooth row (26, 26a, 26b, 26c) in the groove. , 10b, 10c, 10d). 3. A plurality of rotors (36, 36a, 36b) are arranged in a ring chamber (34) comprising a stator (12, 12a, 12b) and at least one of the components (28, 28a, 28b). And the components (28, 28a,
28b) engages with the rotor (36, 36a, 36b) having the teeth (32, 36a, 36b).
, 32a), the drive device (10, 10a, 1) according to claim 1 or 2.
0b). 4. A tooth arrangement according to claim 1, wherein the teeth (26, 37, 53) extend parallel to the stator axis (14) and torque can be picked up at the component (28). The drive device according to any one of (10, 10c, 10
d). 5. The drive (10a, 10b) according to claim 1, wherein the teeth (26a, 26b, 32a) extend helically with respect to the stator axis (14). . 6. The drive (10a) according to claim 5, wherein the component (28a) is axially fixed and the rotor (36a) is axially movable. 7. The drive (10b) according to claim 5, wherein the rotor (36b) is axially fixed and the component (28b) is axially movable. 8. A tooth row of a stator (12, 12a, 12b).
Drive (10, 10a, 10) according to one of the preceding claims, wherein the drive (26b) is formed on the inner peripheral surface (16) of the stator (12, 12a, 12b).
b, 10d). 9. The tooth row (26c) of the stator (12c) is fixed to the stator (12c).
8. The driving device (10c) according to claim 1, wherein the driving device (10c) is formed on an outer peripheral surface (50) of the driving device. 10. A rotor (52) provided, said component being formed as a right-angled shaft (54), said shaft being provided in the center of the rotor (52). The shaft (54) is rotatably arranged in the direction hole (56), said shaft (54) having two parallel webs at the end projecting from the rotor (52), these webs being the shaft (54). Placed vertically with respect to
And reach the stator axis (14), and the web (58) has a shaft section (
60) are formed, the shaft section (60) being longitudinally driven by a drive (10).
2. The drive (10d) according to claim 1, which protrudes from d) and is rotatably supported by the drive (10d).