Transmission connection device, driving system and vehicle

Abstract

The utility model discloses a transmission connecting device, driving system and vehicle, the device includes coaxial connection first connecting shaft and second connecting shaft, the first connecting shaft includes the locating shaft, the second connecting shaft is equipped with the locating hole, the locating shaft and the locating hole are inserted oppositely, the periphery of the locating shaft is equipped with the locating structure, and the locating structure is equipped with the locating hole. The positioning structure comprises a positioning part and a plurality of first positioning teeth arranged along the inner circumference of the positioning part, a flexible part is arranged between the positioning structure and the positioning shaft, a plurality of second positioning teeth are arranged on the end face of the second connecting shaft in the circumferential direction, and the first positioning teeth and the second positioning teeth are alternately arranged at intervals in the circumferential direction. And the flexible piece is arranged between the adjacent first positioning tooth and the second positioning tooth. According to the transmission connecting device, torque fluctuation generated by transmission is effectively filtered, and the transmission reliability of the transmission connecting device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive systems, and particularly relates to a transmission connection device, a drive system and a vehicle. Background Art

[0002] The drive system of a vehicle plays a key role in the overall vehicle function. The drive system includes a motor and a speed reducer. In a traditional drive system, the connection between the motor and the speed reducer is achieved by spline connection or integral gear shaft connection.

[0003] The spline connection means that the inner spline and the outer spline are respectively adopted on the motor rotor shaft and the input shaft of the speed reducer to transmit torque. Since the inner spline and the outer spline are made of steel and are in direct contact, the torque fluctuation of the motor rotor shaft cannot be effectively filtered, thereby causing problems such as noise, vibration and harshness of the drive system; even excessive torque fluctuation will affect the connection reliability between the inner spline and the outer spline, resulting in abnormal wear of the spline and causing power loss of the vehicle.

[0004] The integral gear shaft connection means that the gear of the speed reducer input shaft is arranged on the motor rotor shaft to form an integral structure. This connection method still cannot effectively filter the torque fluctuation of the motor rotor shaft, thereby causing problems such as noise, vibration and harshness of the drive system; at the same time, since the gear of the speed reducer input shaft is arranged on the motor rotor shaft, the motor rotor shaft is subjected to radial force and axial force from gear meshing, reducing the service life of the motor rotor shaft and the reliability of the drive system. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above technical problems and provide a transmission connection device, so as to effectively filter the torque fluctuation in the transmission process and improve the transmission reliability of the transmission connection device. To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] The transmission connection device includes a first connection shaft and a second connection shaft connected coaxially. The first connection shaft includes a positioning shaft, and the second connection shaft is provided with a positioning hole. The positioning shaft and the positioning hole are inserted into each other relatively. A positioning structure is arranged on the outer periphery of the positioning shaft. The positioning structure includes a positioning portion and a plurality of first positioning teeth arranged along the inner periphery of the positioning portion. A flexible member is arranged between the positioning structure and the positioning shaft. A plurality of second positioning teeth are arranged along the circumferential direction of the end face of the second connection shaft. The first positioning teeth and the second positioning teeth are arranged alternately and at intervals along the circumferential direction, and the flexible member is arranged between adjacent first positioning teeth and second positioning teeth.

[0007] Specifically, a first positioning cavity is formed between the positioning portion and the positioning shaft, a second positioning cavity is formed between the first positioning teeth and the positioning shaft, the first positioning cavity communicates with the second positioning cavity, and the flexible member is accommodated in the first positioning cavity and the second positioning cavity.

[0008] Specifically, the end face of the second connecting shaft abuts against the end face of the positioning structure, and the end face of the second positioning teeth abuts against the cavity wall of the first positioning cavity.

[0009] Specifically, the flexible member includes an annular portion and a plurality of tooth-shaped portions provided on the outer periphery of the annular portion; a plurality of tooth-shaped portions are arranged at equal angles along the circumference of the annular portion, and the number of the tooth-shaped portions is the sum of the number of the first positioning teeth and the number of the second positioning teeth.

[0010] Specifically, the tooth-shaped portion is located in the first positioning cavity, one side of the tooth-shaped portion abuts against the first positioning teeth, and the other side of the tooth-shaped portion abuts against the second positioning teeth.

[0011] Specifically, the annular portion is positioned in the second positioning cavity, the annular portion is arranged on the outer periphery of the positioning shaft, and the first positioning teeth abut against the outer periphery of the annular portion in the radial direction.

[0012] Specifically, one end face of the tooth-shaped portion abuts against the cavity wall of the first positioning cavity, the other end face of the tooth-shaped portion abuts against the end face of the second connecting shaft, and the tooth-shaped portion abuts against the positioning portion in the radial direction.

[0013] Specifically, a plurality of first positioning teeth are arranged at equal angles along the circumference of the inner periphery of the positioning portion, a plurality of second positioning teeth are arranged at equal angles along the circumference of the end face of the second connecting shaft, and the number of the first positioning teeth is the same as the number of the second positioning teeth.

[0014] A drive system includes the transmission connection device as described above.

[0015] A vehicle includes the transmission connection device as described above or a drive system as described above.

[0016] Compared with the prior art, the beneficial effects of the transmission connection device of the present invention are mainly reflected in:

[0017] The positioning shaft of the first connecting shaft and the positioning hole of the second connecting shaft are inserted and matched to ensure the coaxiality of the connection and cooperation, thereby improving the torsional transmission stability of the overall device; a space for positioning the flexible member is formed between the positioning structure and the positioning shaft. The positioning structure includes several first positioning teeth, and several second positioning teeth are provided along the circumference of the end face of the second connecting shaft. The first positioning teeth and the second positioning teeth are alternately arranged at intervals along the circumference, and a flexible member is provided between adjacent first positioning teeth and second positioning teeth. When the first connecting shaft and the second connecting shaft rotate in cooperation, torque is transmitted through the flexible member. The flexible member has elasticity and plays a damping effect, which can effectively filter torque fluctuations, improve vibration and noise problems on the power transmission path, and at the same time improve the transmission reliability of the transmission connection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic exploded sectional view of the transmission connection device provided by the embodiment of the present application;

[0019] Figure 2 FIG. is a schematic assembled front sectional view of the transmission connection device provided by the embodiment of the present application;

[0020] Figure 3 FIG. is a schematic side sectional view of the positioning structure provided by the embodiment of the present application;

[0021] Figure 4 FIG. is a schematic side sectional view of the flexible member provided by the embodiment of the present application;

[0022] Figure 5 FIG. is a schematic assembled side sectional view of the transmission connection device provided by the embodiment of the present application.

[0023] REFERENCE MARKS:

[0024] First connecting shaft 1, positioning shaft 11, first positioning tooth 12;

[0025] Second connecting shaft 2, positioning hole 21, second positioning tooth 22;

[0026] Positioning structure 3, positioning portion 31, first positioning cavity 32, second positioning cavity 33;

[0027] Flexible member 4, annular portion 41, tooth-shaped portion 42. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further describes the exemplary embodiments of the present application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0029] Embodiment 1

[0030] This embodiment provides a transmission connection device, which includes a first connection shaft 1 and a second connection shaft 2. The transmission connection device can be applied to a vehicle. Among them, the first connection shaft 1 can be a motor rotor shaft, and the second connection shaft 2 can be a reducer input shaft. The first connection shaft 1 and the second connection shaft 2 are not limited to being applied to a motor and a reducer.

[0031] The first connection shaft 1 includes a positioning shaft 11. The second connection shaft 2 is provided with a positioning hole 21. The positioning shaft 11 is inserted into the positioning hole 21 relatively. The first connection shaft 1 and the second connection shaft 2 are coaxially connected and matched, with high positioning accuracy and torque transmission realized.

[0032] Figure 1 It is a split cross-sectional schematic diagram of the transmission connection device provided by the embodiment of the present application; Figure 2 It is an assembled front cross-sectional schematic diagram of the transmission connection device provided by the embodiment of the present application; Figure 5 It is an assembled side cross-sectional schematic diagram of the transmission connection device provided by the embodiment of the present application.

[0033] As Figure 1 、 Figure 2 、 Figure 5 shown, this embodiment provides a transmission connection device. A positioning structure 3 is provided circumferentially on the positioning shaft 11. The positioning structure 3 includes a positioning portion 31 and a plurality of first positioning teeth 12 arranged along the inner circumference of the positioning portion 31. A flexible member 4 is provided between the positioning structure 3 and the positioning shaft 11. A plurality of second positioning teeth 22 are provided along the circumference of the end face of the second connection shaft 2. The first positioning teeth 12 and the second positioning teeth 22 are arranged alternately and at intervals circumferentially. A flexible member 4 is provided between adjacent first positioning teeth 12 and the second positioning teeth 22.

[0034] In this embodiment, the flexible member 4 can be made of plastic material, and the first connection shaft 1 and the second connection shaft 2 can be made of steel material.

[0035] In this embodiment, the positioning shaft 11 of the first connection shaft 1 and the positioning hole 21 of the second connection shaft 2 are inserted and matched to ensure the coaxiality of the connection and cooperation, thereby improving the stability of the overall device for torque transmission; a space for positioning the flexible member 4 is formed between the positioning structure 3 and the positioning shaft 11. The positioning structure 3 includes a plurality of first positioning teeth 12. A plurality of second positioning teeth 22 are provided along the circumference of the end face of the second connection shaft 2. The first positioning teeth 12 and the second positioning teeth 22 are arranged alternately and at intervals circumferentially. A flexible member 4 is provided between adjacent first positioning teeth 12 and the second positioning teeth 22. When the first connection shaft 1 and the second connection shaft 2 rotate and cooperate, torque is transmitted through the flexible member 4. The flexible member 4 has elasticity and plays a damping effect, which can effectively filter torque fluctuations, improve vibration and noise problems on the power transmission path, and at the same time improve the transmission reliability of the transmission connection device.

[0036] Embodiment 2

[0037] In this embodiment, on the basis of the above embodiment, the transmission connection device is optimized, and in particular, a specific implementation manner of a positioning structure is provided:

[0038] The above-mentioned positioning structure 3 includes a positioning portion 31 and a plurality of first positioning teeth 12 arranged along the inner circumference of the positioning portion 31.

[0039] Figure 1 It is a split cross-sectional schematic diagram of the transmission connection device provided by the embodiment of the present application; Figure 3 It is a side cross-sectional schematic diagram of the positioning structure provided by the embodiment of the present application; Figure 5 It is an assembled side cross-sectional schematic diagram of the transmission connection device provided by the embodiment of the present application.

[0040] As Figure 1 , Figure 3 , Figure 5 shown, a first positioning cavity 32 is formed between the positioning portion 31 and the positioning shaft 11, a second positioning cavity 33 is formed between the first positioning teeth 12 and the positioning shaft 11, the first positioning cavity 32 communicates with the second positioning cavity 33, and the flexible member 4 is accommodated in the first positioning cavity 32 and the second positioning cavity 33.

[0041] When the first connecting shaft 1 and the second connecting shaft 2 are inserted in place, the end face of the second connecting shaft 2 abuts against the end face of the positioning structure 3, the end face of the second positioning tooth 22 abuts against the cavity wall of the first positioning cavity 32, the cavity wall of the first positioning cavity 32 is the end face of the first positioning cavity 32 along the axial direction, the end face of the second positioning tooth 22 abuts against the cavity wall of the first positioning cavity 32 along the axial direction, the first connecting shaft 1 and the second connecting shaft 2 are positioned in place along the axial direction, and a stable connection relationship is formed.

[0042] In this embodiment, the cross-sections of the first positioning teeth 12 and the second positioning teeth 22 along the radial direction are rectangular structures or square structures, and a relatively large bearing force area is formed by the first positioning teeth 12 and the second positioning teeth 22, so that the transmission process remains stable.

[0043] A number of first positioning teeth 12 are arranged at equal angles along the circumference of the inner periphery of the positioning portion 31, and a number of second positioning teeth 22 are arranged at equal angles along the circumference of the end face of the second connecting shaft 2. The number of the first positioning teeth 12 is the same as that of the second positioning teeth 22. In this embodiment, the number of the first positioning teeth 12 is 8, and correspondingly, the number of the second positioning teeth 22 is 8. When the first connecting shaft 1 and the second connecting shaft 2 are inserted in place, the second positioning teeth 22 are located in the first positioning cavity 32. The number of the first positioning teeth 12 and the number of the second positioning teeth 22 are arranged on the same circumferential track, and the first positioning teeth 12 and the second positioning teeth 22 are arranged at intervals alternately. The number of the first positioning teeth 12 and the number of the second positioning teeth 22 form a tight fit through the flexible member 4. The flexible member 4 can effectively filter torque fluctuations, thereby reducing the vibration effect and reducing noise.

[0044] Embodiment III

[0045] This embodiment optimizes the transmission connection device on the basis of the above embodiment, and in particular provides a specific implementation manner of the flexible member:

[0046] Figure 3 It is a schematic side sectional view of the positioning structure provided by the embodiment of the present application; Figure 4 It is a schematic side sectional view of the flexible member provided by the embodiment of the present application; Figure 5 It is a schematic side sectional view of the assembled transmission connection device provided by the embodiment of the present application.

[0047] As Figures 3 - 5 shown, the flexible member 4 includes an annular portion 41 and a number of tooth-shaped portions 42 provided on the outer periphery of the annular portion 41; a number of tooth-shaped portions 42 are arranged at equal angles along the circumference of the annular portion 41, and the included angle between adjacent tooth-shaped portions 42 arranged along the circumference is equal. The number of the tooth-shaped portions 42 is the sum of the number of the first positioning teeth 12 and the number of the second positioning teeth 22. In this embodiment, the number of the tooth-shaped portions 42 is an even number, and the number of the tooth-shaped portions 42 is determined by the number of the first positioning teeth 12 and the number of the second positioning teeth 22 to be 16.

[0048] When the flexible member 4 is assembled in place with the positioning structure 3, the tooth-shaped portion 42 is located in the first positioning cavity 32. One side of the tooth-shaped portion 42 abuts against the first positioning tooth 12, and the other side of the tooth-shaped portion 42 abuts against the second positioning tooth 22. In this embodiment, the cross-section of the tooth-shaped portion 42 along the radial direction can be a rectangular structure or a square structure. The two sides of the tooth-shaped portion 42 abut against the first positioning tooth 12 and the second positioning tooth 22 respectively. The two sides of the tooth-shaped portion 42 have a large contact area with the first positioning tooth 12 and the second positioning tooth 22 respectively, which improves the bearing area and bearing capacity of the overall flexible member 4, can effectively filter torque fluctuations, and makes it feasible to arrange the flexible member 4 in the compact space of the first positioning cavity 32 and the second positioning cavity 33.

[0049] The annular portion 41 is positioned in the second positioning cavity 33. The annular portion 41 is arranged on the outer periphery of the positioning shaft 11, and the first positioning tooth 12 abuts against the outer periphery of the annular portion 41 in the radial direction. The flexible member 4 is axially pushed along the positioning shaft 11 into the second positioning cavity 33. The end face of the annular portion 41 abuts against the cavity wall of the second positioning cavity 33, and the annular portion 41 is limited in the second positioning cavity 33, ensuring the positioning stability of the flexible member 4 and improving the reliability of the assembly of the flexible member 4 and the positioning structure 3. The annular portion 41 is positioned in the circumferential direction of the positioning shaft 11, and the axis of the annular portion 41 and the axis of the positioning shaft 11 are on the same straight line. A plurality of tooth-shaped portions 42 distributed on the annular portion 41 can carry and distribute the uniform load, making the transmission more stable.

[0050] One end face of the tooth-shaped portion 42 facing the first connecting shaft 1 abuts against the cavity wall of the first positioning cavity 32, the other end face of the tooth-shaped portion 42 abuts against the end face of the second connecting shaft 2, and the tooth-shaped portion 42 abuts against the positioning portion 31 in the radial direction. The tooth-shaped portion 42 is stably limited in the space formed by enclosing the positioning portion 31, the cavity wall of the first positioning cavity 32, the first positioning tooth 12, the second positioning tooth 22, and the end face of the second connecting shaft 2. The positioning portion 31 forms a radial limit for the tooth-shaped portion 42, and the positioning portion 31, the first positioning tooth 12, and the second positioning tooth 22 provide a supporting force for the tooth-shaped portion 42. It is understood that when the first connecting shaft 1 is in a high-speed rotation working condition, the flexible member 4 will generate radial deformation. The positioning portion 31 can block the tooth-shaped portion 42 and thus effectively resist the centrifugal force caused by high-speed rotation, providing a reliable radial supporting effect and improving the limit speed performance of the transmission connection device.

[0051] Embodiment 4

[0052] This embodiment provides a drive system, including the transmission connection device in the above embodiment, and further including a motor and a reducer. Among them, the first connecting shaft 1 is the motor rotor shaft, and the second connecting shaft 2 is the input shaft of the reducer.

[0053] Embodiment 5

[0054] This embodiment provides a vehicle, including the transmission connection device in the above embodiment or the drive system in the above embodiment.

[0055] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0057] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0058] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0059] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A transmission connection device, comprising a first connecting shaft (1) and a second connecting shaft (2) connected coaxially, characterized in that: The first connecting shaft (1) comprises a positioning shaft (11), the second connecting shaft (2) is provided with a positioning hole (21), the positioning shaft (11) and the positioning hole (21) are plugged in relative to each other, a positioning structure (3) is provided on the outer periphery of the positioning shaft (11), the positioning structure (3) comprises a positioning portion (31) and a plurality of first positioning teeth (12) arranged along the inner periphery of the positioning portion (31), a flexible member (4) is provided between the positioning structure (3) and the positioning shaft (11), the end surface of the second connecting shaft (2) is provided with a plurality of second positioning teeth (22) along its circumference, the first positioning teeth (12) and the second positioning teeth (22) are arranged alternately and spaced apart along the circumference, and the flexible member (4) is provided between adjacent first positioning teeth (12) and second positioning teeth (22).

2. The transmission connection device according to claim 1, characterized in that: A first positioning cavity (32) is formed between the positioning portion (31) and the positioning shaft (11), a second positioning cavity (33) is formed between the first positioning tooth (12) and the positioning shaft (11), the first positioning cavity (32) is communicated with the second positioning cavity (33), and the flexible member (4) is accommodated in the first positioning cavity (32) and the second positioning cavity (33).

3. The transmission connection device according to claim 2, characterized in that: The end surface of the second connecting shaft (2) abuts against the end surface of the positioning structure (3), and the end surface of the second positioning tooth (22) abuts against the cavity wall of the first positioning cavity (32).

4. The transmission connection device according to claim 2, characterized in that: The flexible member (4) comprises an annular portion (41) and a plurality of tooth-shaped portions (42) arranged on the outer periphery of the annular portion (41); the annular portion (41) has a plurality of tooth-shaped portions (42) arranged at equal angles along the circumference, and the number of the tooth-shaped portions (42) is the sum of the number of the first positioning teeth (12) and the number of the second positioning teeth (22).

5. The transmission connection device according to claim 4, characterized in that: The tooth-shaped portion (42) is located in the first positioning cavity (32), one side of the tooth-shaped portion (42) abuts against the first positioning tooth (12), and the other side of the tooth-shaped portion (42) abuts against the second positioning tooth (22).

6. The transmission connection device according to claim 4, characterized in that: The annular portion (41) is positioned in the second positioning cavity (33), the annular portion (41) is arranged on the outer periphery of the positioning shaft (11), and the first positioning tooth (12) abuts against the outer periphery of the annular portion (41) in the radial direction.

7. The transmission connection device according to claim 4, characterized in that: One end face of the toothed portion (42) abuts against the cavity wall of the first positioning cavity (32), the other end face of the toothed portion (42) abuts against the end face of the second connecting shaft (2), and the toothed portion (42) abuts against the positioning portion (31) in the radial direction.

8. The transmission connection device according to claim 1, characterized in that: The inner circumference of the positioning portion (31) is provided with a plurality of first positioning teeth (12) arranged at equal angles along the circumference, and the end surface of the second connecting shaft (2) is provided with a plurality of second positioning teeth (22) arranged at equal angles along the circumference, and the number of the first positioning teeth (12) is the same as the number of the second positioning teeth (22).

9. The driving system is characterized by: It comprises a transmission connection device as described in any one of claims 1 to 8.

10. A vehicle, characterized in that: It comprises a transmission connection device as described in any one of claims 1 to 8 or a drive system as described in claim 9.

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