Speed reduction motor with motor and speed reducer
By using flange and hollow cylindrical flange areas and connectors in the reducer motor, and using bayonet connections and spring elements, the problem of assembly and maintenance of the reducer motor in the prior art is solved, and the rapid , simple connection and efficient maintenance.
Patent Information
- Application Number
- CN202380038890.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-24
- Filing Date
- 2023-04-25
- Publication Date
- 2024-12-20
AI Technical Summary
Existing gear motors are complex in assembly and maintenance, making it difficult to achieve fast and simple connection and positioning.
The design of flange and hollow cylindrical flange areas and connectors is adopted, and the centering connection is achieved through axial orientation insertion, and the fixation is ensured using bayonet connections and spring elements, simplifying the connection and separation of the motor and the reducer.
The motor and reducer are quickly and easily connected and maintained, which improves assembly and maintenance efficiency, and ensures the reliability of the connection through the friction generated by the spring elements.
Smart Images
Figure CN119173707A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a reduction motor having a motor and a reduction gear. Background Art
[0002] It is generally known that in a reduction motor, a reducer is driven by a motor.
[0003] As the closest prior art, a reduction motor is known from JP 2008-180 319A.
[0004] A drive device is known from DE 10 2018 000 963 A1.
[0005] DE 10 2020 128 970 A1 discloses a geared motor having a multi-stage reduction gear.
[0006] A servomotor is known from DE 103 32 757 A1.
[0007] A geared motor having an adapter element is known from DE 10 2020 003 549 A1. Summary of the invention
[0008] It is therefore an object of the invention to enable simple assembly and / or maintenance in a geared motor.
[0009] According to the invention, this object is achieved by a geared motor according to the features specified in claim 1 .
[0010] In the aspect of the geared motor having a motor and a reducer, an important feature of the present invention is that the reducer has a flange part, which is fixed to a housing part of the reducer by means of a first threaded part.
[0011] In this case, the flange part, in particular on its side facing the motor, has a collar area which is shaped as a hollow cylinder.
[0012] In particular, the cylindrical axis of the collar region formed as a hollow cylinder is aligned coaxially with the axis of rotation of the rotor shaft of the electric machine,
[0013] The connecting element has a first flange region which is shaped as a hollow cylinder and a second flange region which is shaped as a hollow cylinder and is oriented in particular coaxially with the first flange region.
[0014] wherein the first flange region is arranged radially outside the second flange region,
[0015] The first flange area is mounted on the flange area of the flange part, in particular, the first flange area is mounted on the flange area of the flange part in a manner of contacting the flange area of the flange part.
[0016] In particular, the second flange region is arranged radially inwardly of the flange region of the flange part,
[0017] In this case, the connecting element is connected to the electric motor, in particular to a bearing flange or a housing element of the electric motor, by means of a second screw element.
[0018] The advantage here is that simple centering / centring can be achieved by means of these hollow cylindrical flange areas through axially oriented insertion. Therefore, centering can be achieved quickly and easily when the motor is connected to the reducer. Here, the rotor shaft is also inserted into the coupling piece and is thus connected in a rotationally fixed manner to the input shaft that is connected to the coupling piece in a rotationally fixed manner. However, as an alternative, the coupling piece can also be connected to the rotor shaft first, and then to the input shaft when the motor is plug-connected to the reducer. Therefore, a simple connection can be achieved during production or maintenance.
[0019] In an advantageous embodiment, the bayonet wing projects radially and / or radially outwardly at the second flange region. This has the advantage that a rapid connection can be achieved with the bayonet connection.
[0020] In an advantageous embodiment, the flange has a through-going recess, in particular an axial through-going recess, into which at least two projections spaced apart from one another in the circumferential direction, in particular arranged at the same radial distance and in particular having the same shape as one another, project in a radially inwardly oriented manner.
[0021] The second flange area passes through the notch. This has the advantage that a quick and simple bayonet connection can be achieved. Thus, after axial insertion, only a rotation is required to connect the motor to the reducer, as the spring force generated by the spring element is overcome.
[0022] In an advantageous embodiment, the maximum radial distance of the bayonet wings is less than the maximum clear radius of the notch, in particular less than half the maximum clear inner diameter of the notch, and greater than the smallest clear inner diameter of the notch in the circumferential angle region covered by the projection. This has the advantage that the bayonet wings can be simply inserted and then fixed by rotation, wherein the spring element generates an axially acting spring force which causes a friction force which achieves a secure fastening.
[0023] In an advantageous design, the area covered by the second flange area in the axial direction includes the area covered by the first flange area in the axial direction. This has the advantage that the spring element is arranged in a protected manner between the two flange areas, because a flange area is provided radially on the inside and on the outside, respectively.
[0024] In an advantageous embodiment, a spring element, in particular a helical spring, supported on the connection piece presses against the flange piece. This has the advantage that the bayonet connection is ensured by means of the spring element. Since the spring element presses in the axial direction and thus generates a friction force for the bayonet wing, the bayonet wing is thus fixed in the circumferential direction.
[0025] In an advantageous embodiment, the spring element is arranged radially inside the first flange region and radially inside the flange region of the flange part. The advantage here is that the spring element can be arranged in a protected manner.
[0026] In an advantageous embodiment, the spring element is arranged radially outside the second flange region. An advantage here is that the spring element is guided on the second flange region, in particular when the spring element is designed as a helical spring.
[0027] In an advantageous embodiment, the area covered by the first flange area in the axial direction includes the area covered by the spring element in the axial direction. This has the advantage that the spring element is radially surrounded by the first flange area and is therefore particularly well protected.
[0028] In an advantageous embodiment, the spring element is supported on an axially oriented projection of the connecting part.
[0029] In particular, the projections are spaced apart from one another in the circumferential direction and / or the projections are arranged at the same radial distance. An advantage here is that the projections can be optimally designed as support surfaces.
[0030] In an advantageous design, the second threaded element, in particular the threaded element head of the second threaded element, is spaced apart from the spring element in the axial direction. This has the advantage that the projection supports the spring element alone and can therefore be optimally shaped. The threaded element head therefore does not interfere with the support of the spring element.
[0031] In an advantageous embodiment, the second threaded element is arranged at the same radial distance as the projection. This has the advantage that a structural form that is as compact as possible can be achieved.
[0032] In an advantageous design, the radial range covered by the second threaded element overlaps with or includes the radial range covered by the projection. This has the advantage that a structural form that is as compact as possible can be achieved.
[0033] In an advantageous design, the flange has a square or rectangular radial outer circumference with rounded corners. The advantage here is that the reducer can be designed with a square flange and can still be connected to a motor with a round flange.
[0034] In an advantageous embodiment, the rotor shaft is inserted into the axial bore of a coupling element, whose in particular tangentially oriented flat flattened portion / flattened portion is parallel to a corresponding flat flattened portion of the input shaft of the reducer, wherein the corresponding flattened portion of the input shaft is separated from the corresponding flattened portion of the coupling element only by a plastic cover which is placed on the input shaft. This has the advantage that a simple connection can be achieved.
[0035] In an advantageous embodiment, the flange has a protruding, in particular axially protruding, centering pin on its side facing away from the motor, the radial inner side or the radial outer side of the centering pin being designed to be curved, in particular as a partial area of a cylindrical circumference. This has the advantage that the centering pin does not have to be introduced into a corresponding centering hole, but rather rests on a circle or cylinder with its curved surface area, wherein a degree of freedom for deviations caused by tolerances is retained in the circumferential direction.
[0036] In an advantageous embodiment, the reduction gear housing has a convex centering surface, against which the centering pin rests with its curved inner or outer side.
[0037] In particular, the convex centering surface is located on the cylindrical circumference. The advantage here is that a highly accurate centering in the radial direction can be achieved, wherein a degree of freedom for deviations caused by tolerances is retained in the circumferential direction.
[0038] Further advantages are given by the dependent claims. The invention is not limited to the feature combinations of the claims. For a person skilled in the art, other reasonable combinations of the claims and / or the features of the individual claims and / or the features of the description and / or the features of the drawings are apparent, in particular from the objectives proposed and / or from a comparison with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] Now the present invention is described in detail according to the schematic diagram:
[0040] exist Figure 1 The reduction motor according to the invention is shown in an exploded oblique view.
[0041] exist Figure 2 The longitudinal section of the reduction motor is shown in FIG.
[0042] exist Figure 3 A top view of the connection element 7 in the bayonet connection area of the electric machine is shown in FIG.
[0043] exist Figure 4 A cross-sectional view of the connecting piece 7 is shown in FIG.
[0044] exist Figure 5 An oblique view of the motor part of the reduction motor is shown in FIG.
[0045] exist Figure 6 An oblique view of the input area of the reducer of the reduction motor is shown in FIG. DETAILED DESCRIPTION
[0046] As shown in the drawings, the geared motor has a motor 11 , a rotor shaft of which is connected to an input shaft 20 of a reducer of the geared motor via a coupling 2 in a rotationally fixed manner.
[0047] For this purpose, the rotor shaft is inserted into a bore of the coupling part 2 and connected in a non-positively locking manner and / or is connected in a non-positively locking manner by means of a countersunk screw which is screwed into a radially oriented threaded bore of the coupling part 2 .
[0048] The coupling element has two claw areas, the flat inner sides of which bear against corresponding flattened portions of the input shaft 20, in particular so that the input shaft 20 is connected to the coupling element 2 in a rotationally fixed manner, wherein a plastic cap 22 is placed on the input shaft at the end on the side of the input shaft facing the rotor shaft. The plastic cap 22 also covers the flattened portions and is therefore arranged between the input shaft 20 and the coupling element 2. The advantage is that rotational shocks are absorbed in the area where the torque is introduced from the coupling element.
[0049] The coupling member 2 together with the input shaft 20 protrudes through a cutout of the reducer housing 1 .
[0050] The flange 3 is connected to the reducer housing 1 by means of a first screw 5, the threaded area of the first screw being screwed into a corresponding axial hole of the reducer housing 1 and the screw head thereof pressing the flange 3 onto the reducer housing 1. The flange 3 has a notch through which the rotating part formed by the coupling 2 and the input shaft 20 protrudes.
[0051] The flange 3 has a substantially square outer contour. The first screws 5 are arranged in the region of the corners of the square outer contour.
[0052] The flange part 3 has a collar region 6 of hollow cylindrical design which protrudes toward the electric motor 11 .
[0053] The connecting piece 7 has, on its side facing the reducer, a radially inner, hollow cylindrical flange area 10 and a radially outer, hollow cylindrical flange area 13 arranged coaxially with the radially inner flange area, the radially outer flange area in particular having a larger diameter than the radially inner flange area 10.
[0054] The two flange areas 10 and 13 are connected to the perforated bottom of the connecting element 7. Preferably, the connecting element 7 therefore has a pineapple-shaped recess between the two flange areas 10 and 13.
[0055] A plurality of projections 30 spaced apart from one another in the circumferential direction are formed on the side of the bottom facing the reducer and serve as bearing surfaces, ie, in particular, surfaces for supporting, for the spring element 8 .
[0056] The projection 30 extends in the circumferential direction. In particular, the projection 30 extends wider in the circumferential direction than in the axial direction and in the radial direction. Here, these directions are always based on the rotation axis of the input shaft 20.
[0057] The spring element 8 supported on the projection 30 is pressed onto the flange part 3. As a result, the flange part 3 and the projection 30 are pressed apart axially and a bayonet connection is thus ensured.
[0058] In order to realize the form-fitting connection of the bayonet connection, the connecting piece 7 has tongues bent by 90° on the outer edge of the radially inner flange area 10, which are spaced apart from each other in the circumferential direction, so that they protrude radially. The radially outer, hollow cylindrical flange area 13 is placed and / or pushed onto the flange area formed on the flange part 3 and is thus guided. The flange part 3 thus centers the connecting piece 7 and thus the motor 11 by means of its flange area.
[0059] In this way, the connecting part 7 is guided—in particular in the axial direction—by the flange part 3 .
[0060] To produce the bayonet connection, the bayonet wing 9 , in particular the bent tongue, is guided through the area covered by the projection 4 in the axial direction and is then engaged from behind by turning the connection piece 7 .
[0061] The flange 3 has a plurality of axially protruding centering pins 14 on its side facing away from the motor 11, which are in contact with corresponding centering surfaces of the reducer housing. Here, the centering surfaces are preferably all corresponding partial areas of the circumference of a single cylinder.
[0062] The connecting piece 7 is connected to the motor by means of a second screw 12 which passes axially through the connecting piece 7. In particular, the second screw 12 is screwed into an axially oriented threaded hole of a housing part of the motor 11, in particular a bearing flange. Here, the screw head of the second screw 12 presses the connecting piece 7 onto the motor 11. However, the projection 30 protrudes further in the axial direction than these screw heads of the second screw. As a result, the screw head is spaced apart from the spring element 8.
[0063] Preferably, four protrusions 30 are provided, and the screw head of the second screw 12 is arranged at the same radial distance from the protrusions 30. In particular, the radial range covered by the screw head overlaps with the radial range covered by the protrusions 30, or the radial range covered by the screw head includes the radial range covered by the protrusions 30.
[0064] like Figure 6 As shown, the plastic cover 22 is fitted onto the input shaft 20 .
[0065] As in Figure 6 As can be seen in the figure, the reducer housing 1 has a convex centering surface 60, on which the centering pin 14 rests. The convex surface sections of the centering surface 60 are located together on a single imaginary cylindrical circumference. Therefore, not only is the centering pin 14 limited radially outward by the centering surface 60, but the connecting piece 7 is also centered relative to the reducer housing 1.
[0066] In other embodiments according to the invention, the connection piece 7 is not made of metal but of plastic. Therefore, there is no ground connection between the reducer and the motor 11, so that the reducer and the motor 11 are galvanically isolated from each other. Because a plastic cover 22 is arranged between the coupling piece 2 and the input shaft 20, the rotating part of the reduction motor also has galvanic isolation.
[0067] Therefore, in an improved solution, the wear of the plastic cover 22 can be detected by connecting a voltage source to the reduction motor, in particular, wherein a first potential is applied to the housing part of the motor 11, in particular to the bearing flange, and a second potential is applied to the reduction gear housing, in particular to the flange part 3, and detecting the current. This is because when the plastic cover 22 is worn, an electrically conductive connection is generated between the rotor shaft of the motor and the input shaft 20 of the reduction gear.
[0068] In other embodiments according to the present invention, instead of the centering pin 14 , other centering elements are used.
[0069] List of reference numerals:
[0070] 1 Reducer housing
[0071] 2 Connecting parts
[0072] 3 Flange
[0073] 4. Protrusions, in particular radially inwardly directed protrusions
[0074] 5First Screw
[0075] 6 Flange area of flange 3
[0076] 7Connectors
[0077] 8 Spring elements, in particular helical springs
[0078] 9 Bayonet wing
[0079] 10 The radially inner flange region of the connecting piece 7
[0080] 11 Motor
[0081] 12 Second screw
[0082] 13 The radially outer flange region of the connecting piece 7
[0083] 14Centering pin with convex centering surface
[0084] 20 Input shaft
[0085] 21 Gears, especially helical face gears
[0086] 22 Plastic cover
[0087] 30 projection, in particular a bearing surface for the spring element 8
[0088] 60 centering surface.
Claims
1. A reduction motor, comprising a motor and a reducer, The reducer has a flange component, which is fixed to a housing component of the reducer by means of a first threaded component. It is characterized in that The flange part, in particular on the side of the flange part facing the motor, has a collar area which is shaped as a hollow cylinder. In particular, the cylindrical axis of the hollow cylindrical flange region is aligned coaxially with the rotational axis of the rotor shaft of the electric machine. The connecting element has a first flange area formed in the form of a hollow cylinder and a second flange area formed in the form of a hollow cylinder, in particular, the second flange area is oriented coaxially with the first flange area, The first flange area is arranged radially outside the second flange area, The first flange area is placed onto the flange area of the flange part, in particular in a manner that the first flange area contacts the flange area of the flange part. In particular, the second flange region is arranged radially inwardly of the flange region of the flange part. The connecting element is connected to the electric motor, in particular to a bearing flange or a housing element of the electric motor, by means of a second screw element.
2. The reduction motor according to claim 1, It is characterized in that At the second flange region, the bayonet wings protrude radially and / or radially outwardly.
3. A geared motor according to any one of the preceding claims, It is characterized in that The flange has a through-going recess, in particular an axial through-going recess, into which at least two projections spaced apart from one another in the circumferential direction, in particular arranged at the same radial distance, in particular having the same shape as one another, project in a radially inwardly oriented manner, The second flange region extends through the notch.
4. A geared motor according to any one of the preceding claims, It is characterized in that The maximum radial distance of the bayonet wings is smaller than the maximum clear radius of the notch, in particular smaller than half the maximum clear inner diameter of the notch, and larger than the smallest clear inner diameter of the notch in the circumferential angle region covered by the projection.
5. A geared motor according to any one of the preceding claims, It is characterized in that The area covered by the second flange region in the axial direction includes the area covered by the first flange region in the axial direction.
6. A geared motor according to any one of the preceding claims, It is characterized in that A spring element, in particular a helical spring, which is supported on the connecting part presses against the flange part.
7. A geared motor according to any one of the preceding claims, It is characterized in that The spring element is arranged radially inside the first flange region and radially inside the flange region of the flange part, and / or, The spring element is arranged radially outside the second flange region, and / or, The area covered by the first flange area in the axial direction includes the area covered by the spring element in the axial direction.
8. A geared motor according to any one of the preceding claims, It is characterized in that The spring element is supported on a plurality of axially oriented projections of the connecting part, In particular, the projections are spaced apart from one another in the circumferential direction and / or the projections are arranged at the same radial distance.
9. A geared motor according to any one of the preceding claims, It is characterized in that The second threaded element, in particular the threaded element head of the second threaded element, is spaced apart from the spring element in the axial direction.
10. A geared motor according to any one of the preceding claims, It is characterized in that The second threaded member and the protrusion are arranged at the same radial distance, and / or The radial range covered by the second threaded member overlaps with or includes the radial range covered by the protrusion.
11. A geared motor according to any one of the preceding claims, It is characterized in that The flange has a square or rectangular radial outer circumference with rounded corners.
12. A geared motor according to any one of the preceding claims, It is characterized in that The rotor shaft is inserted into the axial hole of the coupling piece, whose in particular tangentially oriented flat flattened portion is parallel to a corresponding flat flattened portion of the input shaft of the reducer, wherein the corresponding flattened portion of the input shaft is separated from the corresponding flattened portion of the coupling piece only by a plastic cover which is placed on the input shaft.
13. A geared motor according to any one of the preceding claims, It is characterized in that The flange part has, on the side of the flange part facing away from the motor, a protruding, in particular axially protruding, centering pin, the radial inner side or the radial outer side of which is designed to be curved, in particular as a partial region of a cylindrical circumference.
14. A geared motor according to any one of the preceding claims, It is characterized in that The reducer housing has a convex centering surface (60), and the centering pin rests on the centering surface with the curved inner side or outer side of the centering pin. In particular, the convex centering surface (60) is located on the cylindrical circumference.