A connection structure of a motor and a transmission

Abstract

The utility model relates to a kind of connecting structure of motor and gearbox, to solve the problem of interference of existing flat connecting plate with boss and rib structure on motor end cover when assembling, including motor connecting plate, the motor connecting face outer edge of motor connecting plate is set to the annular connecting plate extending outward;The center of motor connecting plate is set to the central hole for the input shaft of gearbox to pass through, realize and assemble with motor output shaft;Annular flange structure is provided on the outer circle of central hole on motor connecting face;Motor connecting plate is provided with gearbox housing connecting hole for being fixed with gearbox housing, motor connecting hole for being fixed with motor end cover. The utility model is guaranteed that gearbox and motor can be perfectly connected by the motor connecting plate and the annular connecting plate extending outward set to its outer edge.

Description

Technical Field

[0001] This utility model relates to a connection structure, specifically a novel connection structure between a motor and a gearbox. Background Technology

[0002] In recent years, with strong government support, new energy vehicle technology has reached new heights, and new energy vehicles are gaining an increasingly larger market share. To cope with the complex and harsh working conditions in mining areas, a 4-speed pure electric mining gearbox with three intermediate shafts has been developed. However, the single motor matched with this gearbox has relatively small power and torque parameters, and its output shaft has an internal spline hole shape. Therefore, the matching motor connecting plate is flat, such as... Figure 1 As shown, the gearbox input shaft passes through the motor connecting plate and extends into the spline inside the motor output shaft for connection. For example, patent CN208615716U discloses a connection structure between a pure electric motor and a gearbox, which is also generally in the form of a flat plate. Currently, some motor manufacturers have developed a high-power single motor. The end face size of this motor is larger than that of ordinary single motors, and the end cover of this motor has bosses and rib structures. The assembly of ordinary flat motor connecting plates with this motor causes interference. Therefore, there is an urgent need to design a new type of connecting plate structure to solve the interference problem during assembly. Utility Model Content

[0003] The purpose of this invention is to solve the technical problem of interference between the existing flat connecting plate and the boss and rib structure on the motor end cover during assembly. It proposes a new motor and gearbox connection structure, which ensures a perfect connection between the gearbox and the motor by using the motor connecting plate and the outwardly extending annular connecting plate set on its outer edge.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A connection structure between a motor and a gearbox includes a motor connecting plate. The motor connecting plate includes a gearbox connecting surface for connecting to a gearbox housing and a motor connecting surface for connecting to a motor end cover. The key feature is that: an annular connecting plate extending axially outward is provided along the outer edge of the motor connecting surface; a central hole is provided at the center of the motor connecting plate for the gearbox input shaft to pass through and for assembly with the motor output shaft; an annular flange structure is provided along the outer circumference of the central hole on the motor connecting surface, the flange structure being concentric with the central hole and having a diameter larger than that of the central hole; the motor connecting plate is provided with a gearbox housing connecting hole for fixing to the gearbox housing and a motor connecting hole for fixing to the motor end cover, the motor connecting holes being evenly distributed on the end face of the annular connecting plate.

[0006] Furthermore, a raised annular positioning stop is provided on the inner circumference of the end face of the annular connecting plate. The positioning stop is adapted to the positioning stop on the motor end cover and is used for positioning the motor connecting plate and the motor end cover.

[0007] Furthermore, multiple internal flange ribs are provided between the flange structure and the central hole, and the internal flange ribs are evenly distributed along the outer circumference of the central hole.

[0008] Furthermore, multiple shell reinforcing ribs are provided on the motor connection surface of the motor connection plate between the flange structure and the annular connection plate. The shell reinforcing ribs include multiple annular reinforcing ribs and strip reinforcing ribs.

[0009] Furthermore, there are two annular reinforcing ribs, which are coaxially arranged with the central hole. The strip-shaped reinforcing ribs are arranged radially, with one end set on the outer circumference of the flange structure and the other end set on the bottom of the inner circumference of the annular connecting plate.

[0010] Furthermore, the flange has 8 internal ribs; the housing has 14 connecting holes; and the motor has 12 connecting holes.

[0011] Furthermore, the motor connection hole is a threaded hole, which corresponds one-to-one with the through hole on the outer periphery of the motor end cover.

[0012] Furthermore, the gearbox input shaft has an external spline structure, and the motor output shaft has an internal spline structure, with torque transmitted between them via a spline connection.

[0013] The advantages of this utility model compared to the prior art are:

[0014] 1) The connection structure between the motor and the gearbox of this utility model is an integrated structure formed by the motor connecting plate and the annular connecting plate thereon. The whole structure is basin-shaped, which can effectively avoid interference between the flange structure in the center of the motor connecting plate and the boss structure in the center of the motor end cover.

[0015] 2) The connection structure between the motor and the gearbox of this utility model has a raised positioning stop on the outer periphery of the motor connecting plate, which is adapted to the positioning stop on the motor end cover. This allows for better positioning when assembling the motor connecting plate and the motor end cover, ensuring the assembly effect.

[0016] 3) The connection structure between the motor and the gearbox of this utility model has a flange structure set at the outer end of the central hole inside the motor connection plate, which is connected to the central hole by a reinforcing rib; multiple shell reinforcing ribs are set at the bottom inner side of the motor connection plate to better enhance the strength of the motor connection plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the existing motor connection plate.

[0018] Figure 2 This is a schematic diagram of the motor connection surface of an embodiment of the connection structure between the motor and the gearbox of this utility model;

[0019] Figure 3 This is a schematic diagram of the gearbox connection surface in an embodiment of the connection structure between the motor and the gearbox of this utility model;

[0020] Figure 4 , Figure 5 This is a schematic diagram of the assembly of the motor and gearbox in an embodiment of the connection structure between the motor and gearbox of this utility model;

[0021] The annotations in the attached figures are explained as follows:

[0022] 1-Motor connecting plate, 2-Gearbox housing, 3-Gearbox input shaft, 4-Motor end cover, 5-Motor output shaft, 10-Annular connecting plate, 11-Center hole, 12-Flange structure, 13-Flange internal rib, 14-Housing reinforcing rib, 15-Gearbox housing connecting hole; 16-Positioning stop; 17-Motor connecting hole. Detailed Implementation

[0023] To make the objectives, advantages and features of this utility model clearer, the connection structure between the motor and the gearbox proposed in this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, the present invention is a newly designed structure for solving the external assembly interference between the drive motor and the gearbox. It includes a motor connecting plate 1, an annular connecting plate 10, a central hole 11, a flange structure 12, an internal flange rib 13, a housing reinforcing rib 14, a gearbox housing connecting hole 15, a positioning stop 16, and a motor connecting hole 17. The motor connecting plate 1 includes a gearbox connecting surface for connecting to the gearbox housing 2 and a motor connecting surface for connecting to the motor end cover 4. An outwardly extending annular connecting plate 10 is provided along the outer edge of the motor connecting surface of the motor connecting plate 1. The motor connecting plate 1 is made of cast iron and, together with the annular connecting plate 10, forms a basin-shaped structure, primarily to avoid interference between the flange structure at the center of the connecting plate and the boss structure at the center of the motor end cover 4. A central hole 11 is provided in the center of the motor connecting plate 1 for the gearbox input shaft 3 to pass through. The gearbox input shaft 3 extends through this central hole and is assembled with the motor output shaft 5. The motor output shaft 5 has an internal spline structure, and the gearbox input shaft 3 has an external spline structure; the two are connected by a spline to transmit torque. A flange structure 12 is provided at the outer end of the central hole inside the motor connecting plate 1. This structure is concentric and coaxial with the central hole 11, but its diameter is larger than 11. The two are connected by a flange structure 12. Eight reinforcing ribs 13 are connected; multiple housing reinforcing ribs 14 are provided on the inner bottom of the motor connecting plate 1, mainly to enhance the strength of the parts; the bottom of the motor connecting plate 1 has 14 housing connecting holes 15, which are adapted to the 14 bolt holes on the gearbox housing 2, and the gearbox housing 2 and the motor connecting plate 1 are assembled through these connecting holes; the outer periphery of the annular connecting plate 10 has a raised positioning stop 16, which is adapted to the positioning stop on the motor end cover 4, and is used for positioning when assembling the motor connecting plate 1 and the motor end cover 4; 12 motor connecting holes 17 are evenly distributed on the end face of the outer periphery of the annular connecting plate 10. These motor connecting holes 17 are threaded holes, and the corresponding 12 motor connecting holes on the outer periphery of the motor end cover 4 are through holes. When installing, the bolts are tightened from the direction of the motor end cover 4 to the direction of the motor connecting plate 1. The bolt installation direction cannot be reversed.

[0025] See Figure 4 , Figure 5 During the assembly process: First, the gearbox input shaft 3 passes through the center hole 2 of the gearbox housing; the motor connecting plate 1 is fitted onto the gearbox input shaft 3, and the housing connecting hole 15 is connected and fixed to the gearbox housing 2 by bolts; then the motor output shaft 5 is inserted into the motor through the shaft hole on the motor end cover 4; finally, the motor is moved closer to the gearbox, and the stop of the motor end cover 4 is supported and aligned with the positioning stop 16 on the outer periphery of the motor connecting plate 1. Then, the threaded holes on the outer periphery of the motor end cover 4 are aligned one by one with the motor connecting holes 17 on the outer periphery of the motor connecting plate 1. Finally, the assembly is completed by tightening 12 motor connecting bolts from the end cover direction to the connecting plate direction.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

Claims

1. A connection structure between a motor and a gearbox, comprising a motor connection plate (1), the motor connection plate (1) including a gearbox connection surface for connecting to a gearbox housing (2) and a motor connection surface for connecting to a motor end cover (4); characterized in that: An annular connecting plate (10) extending outward along the axial direction is provided on the outer edge of the motor connecting surface; a central hole (11) is provided at the center of the motor connecting plate (1) for the gearbox input shaft (3) to pass through and be assembled with the motor output shaft (5); an annular flange structure (12) is provided on the motor connecting surface along the outer circle of the central hole (11), the flange structure (12) is concentric with the central hole (11) and the hole diameter is larger than the hole diameter of the central hole (11); a gearbox housing connecting hole (15) for fixing with the gearbox housing (2) and a motor connecting hole (17) for fixing with the motor end cover (4) are provided on the motor connecting plate (1), and the motor connecting holes (17) are evenly arranged on the end face of the annular connecting plate (10).

2. The connection structure between the motor and the gearbox according to claim 1, characterized in that: The annular connecting plate (10) has a raised annular positioning stop (16) on the inner circumference of its end face. The positioning stop (16) is adapted to the positioning stop on the motor end cover (4) and is used for positioning the motor connecting plate (1) and the motor end cover (4).

3. The connection structure of the electric motor and the transmission according to claim 2, characterized by: Multiple internal flange ribs (13) are provided between the flange structure (12) and the central hole (11), and the internal flange ribs (13) are evenly distributed along the outer circumference of the central hole (11).

4. The connection structure of the electric motor and the transmission according to claim 3, characterized by: On the motor connection surface of the motor connection plate (1), there are multiple shell reinforcing ribs (14) located between the flange structure (12) and the annular connection plate (10). The shell reinforcing ribs (14) include multiple annular reinforcing ribs and strip reinforcing ribs.

5. The connection structure of the electric motor and the transmission according to claim 4, characterized in that: There are two annular reinforcing ribs, which are coaxially arranged with the central hole (11). The strip reinforcing ribs are arranged radially, with one end set on the outer circumference of the flange structure (12) and the other end set on the bottom of the inner circumference of the annular connecting plate (10).

6. The connection structure between the motor and the gearbox according to claim 4, characterized in that: The flange has 8 internal ribs (13); the housing has 14 connecting holes (15); and the motor has 12 connecting holes (17).

7. The connection structure between the motor and the gearbox according to claim 5, characterized in that: The motor connection hole (17) is a threaded hole, which corresponds one-to-one with the through hole on the outer periphery of the motor end cover (4).

8. The connection structure between the motor and the gearbox according to claim 5, characterized in that: The gearbox input shaft (3) has an external spline structure, and the motor output shaft (5) has an internal spline structure. The two are connected by a spline to transmit torque.

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