Connecting structure of motor and gearbox and vehicle

Abstract

The utility model discloses a connecting structure of a motor and a gearbox and a vehicle, and belongs to the technical field of gearbox and motor connection, the connecting structure comprises an output shaft connecting part and a transition flange, the output shaft connecting part comprises a spline sleeve, and an inner spline is arranged in the spline sleeve; the internal spline can be matched with an external spline of a to-be-connected motor output shaft and an external spline of a to-be-connected gearbox input shaft, and a buffering piece is arranged in the spline sleeve. The transition flange comprises a first end face, a transition part and a second end face which are sequentially connected in the axial direction. The first end face can be arranged on a to-be-connected motor end cover, and the second end face can be arranged on a to-be-connected gearbox shell. The first end face, the transition part and the second end face form an output shaft connecting channel; the first end face and the second end face are provided with a first installation hole set and a second installation hole set respectively. According to the utility model, the gearbox and the motor can be relatively well connected, and meanwhile, the effectiveness and the stability of internal power transmission of the gearbox and the motor are also ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field that gearbox and motor connect, specifically related to a motor and gearbox's connecting structure, vehicle. BACKGROUND

[0002] At present, with the increasing concern of society on environmental protection problem, new energy automobile is with its green non - pollution advantage in the rapid development, and the demand of new energy automobile presents steady growth trend. New energy automobile technology continuously innovates, battery, motor, gearbox and so on have new breakthrough, and the spare parts of new energy automobile etc. are also in constant innovation, innovation to meet the market challenge. Under this background, battery technology, motor technology and gearbox technology and so on key field have made remarkable progress.

[0003] At present, in the matching process of new energy automobile transmission system, when the motor output shaft and the gearbox output shaft adopt the outer spline structure, the connection between the two becomes particularly difficult. Specifically, one of the situations existing in the current market is that the output shaft of some motors is designed as an outer spline structure, and its diameter is small. At the same time, the input shaft of the gearbox also adopts an outer spline structure. Because both of them are outer splines, the traditional connection methods such as direct insertion or sleeve connection cannot achieve effective connection. In addition, the diameter of the outer end surface of the motor and the diameter of the end surface of the gearbox shell are quite different, which further increases the difficulty of matching. When trying to directly connect the motor output shaft and the gearbox input shaft, because both of them are outer splines, effective spline connection cannot be formed, resulting in unstable power transmission or no transmission. The diameter difference between the outer end surface of the motor and the end surface of the gearbox shell makes it impossible to be fixed directly by ordinary flanges or other connecting pieces. Therefore, in summary, under the condition that the output shafts of the motor and the gearbox are both outer splines, effective connection cannot be achieved; and when the diameters of the end surfaces of the motor and the gearbox do not match, they cannot be fixed by ordinary flanges and the like. UTILITY MODEL CONTENTS

[0004] The utility model provides a motor and gearbox's connecting structure, vehicle, and the purpose is to solve the problem that effective connection cannot be achieved under the condition that the output shafts of the motor and the gearbox are both outer splines; and when the diameters of the end surfaces of the motor and the gearbox do not match, they cannot be fixed by ordinary flanges and the like.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a motor and gearbox's connecting structure, which comprises an output shaft connecting part and a transition flange, wherein:

[0007] The output shaft connecting part comprises a spline sleeve, which is a cylindrical structure and has internal spline inside, the internal spline can match the external spline of the motor output shaft and the gearbox input shaft, and the spline sleeve is configured with a buffer piece inside;

[0008] The transition flange comprises a first end face, a transition part and a second end face connected in sequence along the axial direction thereof; the first end face can be configured on the motor end cover to be connected, and the second end face can be configured on the gearbox shell to be connected;

[0009] The transition part is provided with a central hole along the axial direction thereof, the diameter of the central hole is larger than the external contour size of the spline sleeve, and the first end face, the transition part and the second end face form an output shaft connecting channel; the first end face and the second end face are respectively provided with a first mounting hole group and a second mounting hole group.

[0010] In some embodiments, the outer part of the transition part is provided with a plurality of reinforcing ribs along the circumferential direction thereof.

[0011] Further, the cross section of the reinforcing rib along the radial direction of the central hole is triangular.

[0012] In some embodiments, the first mounting hole group comprises a motor connecting hole, a position hole and a positioning recess, the motor connecting hole and the position hole are arranged on the first end face, and the positioning recess is an annular step formed by the first end face and the central hole at the connecting position.

[0013] In some embodiments, the second mounting hole group comprises a plurality of gearbox connecting holes, and the plurality of gearbox connecting holes are arranged in a ring shape on the second end face.

[0014] Further, the second end face is formed with an annular sink at the end face away from the transition part.

[0015] In some embodiments, the first end face has at least one part of the gap at the edge along the circumferential direction thereof.

[0016] In some embodiments, the internal part of the spline sleeve is provided with a groove along the circumferential direction thereof, and the buffer piece can be installed in the groove.

[0017] In some embodiments, the buffer piece comprises a hole elastic retainer.

[0018] The utility model further provides a vehicle, the vehicle comprises the connecting structure of the above motor and gearbox.

[0019] Compared with the prior art, the utility model discloses a motor and gearbox connecting structure and vehicle, which has the following beneficial effects:

[0020] This utility model discloses a connection structure between a motor and a gearbox. The output shaft connection includes a spline sleeve with internal splines and a buffer component, which are adapted to the external splines of the motor output shaft and the gearbox input shaft. A transition flange forms the output shaft connection channel. The spline sleeve of this utility model achieves a high-precision connection by mating with the external splines of the motor and gearbox, avoiding axial offset or vibration during power transmission. Furthermore, the buffer component absorbs impact loads, disperses pressure, and extends the service life of the connection structure. The transition flange of this utility model, through multiple mounting hole groups on the first and second end faces, is compatible with motor end covers and gearbox housings of different specifications, improving the problem of direct matching caused by differences in the end face diameters of the motor and gearbox. This utility model designs a connection structure external to the drive motor and gearbox, ensuring not only a relatively intact connection between the gearbox and motor but also the stability of power transmission within the gearbox and motor, thus possessing significant practical value. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0022] Figure 1 This utility model provides a connection structure between a motor and a gearbox, and a schematic diagram showing the installation state of the connection structure between a motor and a gearbox in a vehicle.

[0023] Figure 2 This utility model relates to a connection structure between a motor and a gearbox, and is applicable to vehicles. Figure 1 A schematic diagram of the assembly cross-section;

[0024] Figure 3 This is a schematic diagram of the connection structure between a motor and a gearbox, and the structure of a transition flange in a vehicle, according to this utility model.

[0025] The attached diagram shows: 1. Motor end cover to be connected; 11. Motor mounting hole; 12. Protruding positioning stop.

[0026] 2. Motor output shaft to be connected, 21. Shaft hole, 22. Stepped hole;

[0027] 3. Gearbox housing; 31. Gearbox mounting hole; 4. Input shaft of the gearbox to be connected; 5. Spline sleeve; 51. Groove; 6. Elastic retaining ring for the hole; 7. Transition flange;

[0028] 71. First end face; 711. Motor connection hole; 712. Position hole; 713. Positioning recess.

[0029] 72. Transition section; 721. Center hole; 722. Reinforcing rib;

[0030] 73, second end face, 731, gearbox connecting hole, 732, annular sink. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0033] Similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0036] In the description of the embodiments of the utility model, still need explaining, unless another explicit provision and limitation, if appearing the term "arrangement", "installation", "connection", "connect" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication. For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning in the utility model.

[0037] How to design a set of connecting structure outside the driving motor and gearbox, not only ensure that the gearbox and motor can be perfectly connected, while ensuring the stability of internal power transmission.

[0038] As Figures 1-3 Indicated, the utility model discloses a motor and gearbox's connecting structure, including output shaft connecting portion and transition flange 7, wherein:

[0039] Output shaft connecting portion includes spline sleeve 5, and spline sleeve 5 is cylindrical structure and has internal spline inside, and internal spline can be adapted to the spline of the motor output shaft 2 to be connected and the input shaft 4 to be connected gearbox, and buffer piece is configured in spline sleeve 5;

[0040] Transition flange 7 includes first end face 71, transition part 72 and second end face 73 connected in sequence along its axial direction;First end face 71 can be configured to the motor end cover 1 to be connected, and second end face 73 can be configured to the gearbox housing 3 to be connected;

[0041] Transition part 72 is provided with central hole 721 along its axial direction, and the hole diameter of central hole 721 is greater than the outer contour size of spline sleeve 5, and first end face 71, transition part 72 and second end face 73 form output shaft connecting channel;First end face 71 and second end face 73 are respectively provided with first mounting hole group and second mounting hole group.

[0042] The utility model discloses a motor and gearbox's connecting structure, in the case where the output shaft of motor and gearbox is external spline, can realize effective connection, and when the diameter of the end face of motor and gearbox is not matched, can be connected and fixed through the connecting structure of the utility model, to form stable transmission structure.

[0043] As in some embodiments, the output shaft of 2E110 gearbox and Danfoss motor is external spline, and the size difference between the motor end cover of Danfoss motor and the gearbox housing 3 of 2E110 gearbox is large, in this working condition, the motor and gearbox's connecting structure of the utility model can be used, to complete the connection of 2E110 gearbox and Danfoss motor and realize effective and stable transmission of power.

[0044] In some embodiments, the utility model discloses a plurality of reinforcing ribs 722 are arranged outside the transition part 72 along the circumference, the utility model discloses the design of reinforcing rib 722, the bending resistance, the torsional resistance and the like of transition flange 722 are significantly improved, prevent the deformation or cracking that transition flange 722 can produce due to power transmission vibration, be applicable to high torque working condition, improve the strength of connecting structure.

[0045] Preferably, the radial section of the reinforcing rib 722 of the utility model is triangular. The triangular section provides higher bending stiffness under the same material consumption, and the stress distribution is more uniform, avoiding stress concentration leading to local fatigue damage of the reinforcing rib 722.

[0046] In actual working conditions, the utility model discloses a notch is arranged on the circumferential edge of the first end surface 71 for further assembly convenience and weight reduction, and / or an annular counterbore 732 is arranged on the second end surface 73. The annular counterbore 732 reduces the material consumption under the premise of ensuring the strength, reduces the overall weight, the notch can reduce the weight of the transition flange 7 to a certain extent, reduces the manufacturing cost, and provides a certain space for operation, simplifies the disassembly and maintenance process.

[0047] The utility model also provides a vehicle, which comprises the connecting structure of the motor and the gearbox provided above. Through the vehicle adopting the connecting structure of the utility model, the motor and the gearbox can be efficiently and stably connected, thereby improving the efficiency of power transmission.

[0048] The motor and the gearbox connecting structure and the vehicle of the utility model will be further described in detail through specific embodiments.

[0049] As shown in the drawings, Figure 1 The present embodiment takes the matching of a 2E110 gearbox and a Danfoss motor as an example. Since the motor output shaft of the Danfoss motor is small in diameter and has an external spline structure, the input shaft of the 2E110 gearbox also has an external spline structure, the motor output shaft of the Danfoss motor cannot be directly connected to the input shaft of the 2E110 gearbox, and there is a large difference between the diameter of the outer end surface of the Danfoss motor and the diameter of the end surface of the 2E110 gearbox shell, so they cannot be directly matched. Based on this, the connecting structure for external assembly and internal power transmission of the driving motor and the gearbox is provided.

[0050] The motor end cover 1 to be connected has eight motor mounting holes 11 uniformly distributed near the outer periphery, and a raised positioning stop 12 on the outer end surface;

[0051] The motor output shaft 2 is an external spline structure, and the shaft end is provided with a shaft hole 21, the hole diameter is equivalent to the shaft head diameter of the to-be-connected gearbox input shaft 4, and the hole depth is slightly larger than the shaft head length of the to-be-connected gearbox input shaft 4, so that the shaft head of the to-be-connected gearbox input shaft 4 can be inserted into the shaft hole of the to-be-connected motor output shaft 2, and the assembly will not interfere, and the two are gap fit; the bottom of the shaft hole 21 is provided with a stepped hole 22 with a slightly larger diameter, and the stepped hole 22 is mainly designed to ensure that the boring tool can be deeply inserted into the bottom of the shaft hole, and the machining accuracy of the shaft hole is ensured.

[0052] The gearbox input shaft 4 is an external spline structure, and the gearbox shell 3 is uniformly provided with twelve gearbox mounting holes 31 near the outer periphery.

[0053] The to-be-connected motor output shaft 2 and the to-be-connected gearbox input shaft 4 are connected by spline sleeves 5; the spline sleeve 5 is an internal spline cylindrical structure, and the inside of the spline sleeve 5 is provided with a groove 51, and the groove 51 is used for installing a hole elastic retainer 6, which can bear and disperse part of the pressure through the hole elastic retainer 6, so as to ensure the reliable stability of the connection, and also plays a limiting role.

[0054] As shown in Figure 3 The transition flange 7 is composed of three parts, namely a first end face 71 connected with the motor, a second end face 73 connected with the gearbox shell 3, and a transition part 72 between the first end face 71 and the second end face 73.

[0055] The first end face 71 of the transition flange 7 is provided with eight motor connection holes 711, which are matched with the motor mounting holes 11; there are six position holes 712 with slightly larger diameters, which can be used for installation on the vehicle and are symmetrically distributed on the left and right sides of the first end face 71. The first end face 71 is provided with a positioning stop 713, which is matched with the convex stop 12 on the motor end cover. Moreover, the first end face 71 is symmetrically arc-shaped and chamfered on the upper and lower sides to present a notch shape. Through the chamfering design, the weight is reduced, the use of raw materials is saved, and the disassembly and installation are facilitated.

[0056] The center of the transition part 72 is provided with a center hole 721, and the diameter of the center hole 721 is larger than the outer diameter of the spline sleeve 5, so that the spline sleeve 5 can pass through and assemble without interference; the two ends of the center hole 721 are chamfered, mainly for convenient assembly, preventing damage from knocking, and beautifying the appearance. Six reinforcing ribs 722 are arranged on the outside of the transition part 72, mainly to enhance the strength of the transition flange 7.

[0057] The second end face 73 is provided with twelve gearbox connection holes 731; the gearbox connection holes 731 are matched with the gearbox mounting holes 31; and the second end face 72 is provided with an annular sink 732, which reduces the redundant structure and further reduces the weight of the overall structure.

[0058] In the assembly, the motor output shaft 2 to be connected extends out of the motor end cover, and the gearbox input shaft 4 to be connected extends out of the gearbox shell 3. The inner embedded hole of the spline sleeve 5 is provided with an elastic stop ring 6, and one end of the spline sleeve 5 is sleeved on the motor output shaft 2 to be connected. The first end face 71 is close to the motor end cover, and the motor connecting hole 711 is aligned with the motor mounting hole 11, so that the positioning convex stop 12 on the motor end cover is tightly matched with the first end face recessed stop 713, the gap of the first end face 71 is distributed upward and downward, and then the bolt is tightened. The gearbox shell 3 is matched with the second end face 73, the gearbox input shaft 4 to be connected is inserted into the other end of the spline sleeve 5, and is inserted into the shaft hole of the motor output shaft 2 to be connected, so that the gearbox connecting hole 731 is aligned with the gearbox mounting hole 31, then the bolt is tightened, and the assembly is completed.

[0059] In summary, the motor and gearbox connecting structure can realize seamless connection across the size, reduce vibration wear, and ensure efficient power transmission. The weight is reduced by the gap and the sunken table design, and the precision and convenience of the connection are improved, the new energy automobile power system can be quickly adapted, and the stability of the motor and gearbox connection is improved.

[0060] Finally, it should be noted that: the above-described is only a preferred embodiment of the utility model, and does not limit the utility model in any form; any ordinary technical personnel in the industry can implement the utility model according to the description and the above description; however, any equivalent changes, modifications and evolution of the above-mentioned technical content within the scope of the technical scheme of the utility model can be made by the skilled in the art, and all the equivalent changes, modifications and evolution are equivalent embodiments of the utility model; at the same time, any equivalent changes, modifications and evolution of the above-mentioned technical content within the scope of the technical scheme of the utility model are still within the protection scope of the technical scheme of the utility model.

Claims

1. A connection structure between a motor and a gearbox, characterized in that, The output shaft connecting part and the transition flange (7) are included, wherein: The output shaft connecting part includes a spline sleeve (5), which is a cylindrical structure and has internal spline inside, which can adapt to the external spline of the motor output shaft (2) and the gearbox input shaft (4) to be connected, and the spline sleeve (5) is configured with a buffer piece; The transition flange (7) includes a first end face (71), a transition part (72) and a second end face (73) connected in sequence along its axial direction; the first end face (71) can be configured on the motor end cover (1) to be connected, and the second end face (73) can be configured on the gearbox shell (3) to be connected; The transition part (72) is provided with a center hole (721) along its axial direction, the hole diameter of the center hole (721) is larger than the outer contour size of the spline sleeve (5), the first end face (71), the transition part (72) and the second end face (73) form an output shaft connecting channel; the first end face (71) and the second end face (73) are respectively provided with a first mounting hole group and a second mounting hole group.

2. The connection structure of an electric motor and a transmission according to claim 1, characterized in that, The transition part (72) is provided with a plurality of reinforcing ribs (722) along its circumferential direction.

3. The connection structure of an electric motor and a transmission according to claim 2, characterized in that, The cross section of the reinforcing rib (722) along the radial direction of the center hole (721) is triangular.

4. The connection structure of an electric motor and a transmission according to claim 1, characterized in that, The first mounting hole group includes a motor connecting hole (711), a position hole (712) and a positioning concave notch (713), the motor connecting hole (711) and the position hole (712) are arranged on the first end face (71), and the positioning concave notch (713) is an annular step formed by the first end face (71) and the center hole (721) at the connecting position.

5. The connection structure of an electric motor and a transmission according to claim 1, characterized in that, The second mounting hole group includes a plurality of gearbox connecting holes (731), and the plurality of gearbox connecting holes (731) are arranged in a ring shape on the second end face (73).

6. A connection structure of an electric motor and a transmission according to claim 5, characterized in that, The second end face (73) is formed with an annular sink (732) at the end face away from the transition part (72).

7. The connection structure of a motor and a transmission according to Claim 1, wherein The first end face (71) has at least one part of the gap along its circumferential edge.

8. The connection structure of a motor and a transmission according to claim 1, characterized in that, The internal part of the spline sleeve (5) is provided with a groove (51) along its circumferential direction, and the buffer piece can be installed in the groove (51).

9. The connection structure of a motor and a transmission according to Claim 1, wherein The buffer piece includes a hole elastic retainer (6).

10. A vehicle characterized by comprising: The vehicle includes the motor and gearbox connecting structure according to any one of claims 1-9.

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