A pure electric vehicle disconnect mechanism

Abstract

The utility model discloses a kind of pure electric vehicle disconnecting mechanism, it relates to automobile parts field.The pure electric vehicle disconnecting mechanism, including half shaft and spline shaft, the outer surface transmission connection of half shaft has spline hub, meshing hub for transmission is movably arranged between the spline hub with the spline shaft, and the meshing hub is close to the end of half shaft and is provided with electromagnetic component, wave spring is arranged between the electromagnetic component with meshing hub.The pure electric vehicle disconnecting mechanism, when electromagnetic component is powered off, meshing hub is compressed on spline shaft by wave spring force, end spline is engaged with spline groove on spline shaft, transmission is carried out, when electromagnetic component is powered on, under the action of electromagnetic force, meshing hub moves left, meshing hub is disconnected with spline shaft transmission, the torque on spline shaft cannot be transmitted to spline hub at this time, transmission is disconnected, to realize transmission disconnecting and closing using electromagnet, structure is simple and compact, and key transmission part adopts spline connection, and reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically a disconnection mechanism for pure electric vehicles. Background Technology

[0002] In the two-wheel drive mode of a pure electric four-wheel drive vehicle, the other two motors are not working. The tires rotate with the motors through the half-shaft and reducer, which generates current in the stator coils, causing iron loss and drag loss, affecting the vehicle's range and driving safety. To solve this problem, a mechanism that disconnects the wheel transmission is needed.

[0003] Most disconnection mechanisms on the market are external mechanical disconnection mechanisms, which are installed on the housing of the electric drive assembly. This results in a large size and poses a significant challenge to the vehicle's layout space. Furthermore, the use of a DC motor to control the shift fork, which in turn controls the dog-tooth meshing mechanism to control the disconnection, leads to low reliability. Therefore, a disconnection mechanism for pure electric vehicles is specifically provided. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a disconnection mechanism for pure electric vehicles, which solves the problems of large size and low reliability of existing transmission disconnection mechanisms for pure electric four-wheel drive vehicles.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a disconnection mechanism for a pure electric vehicle, comprising a half shaft and a spline shaft, wherein a spline hub is connected to the outer surface of the half shaft for transmission, and a meshing hub for transmission is movably arranged between the spline hub and the spline shaft, and an electromagnetic component is provided at one end of the meshing hub near the half shaft, and a wave spring is provided between the electromagnetic component and the meshing hub. When the electromagnetic component is turned off, the engagement hub remains connected to the spline hub and spline shaft under the action of the wave spring. The electromagnetic component is activated to attract the engagement hub and move it toward one end of the electromagnetic component, thereby disengaging the engagement hub from the splined hub and splined shaft.

[0006] Preferably, it also includes an outer casing, with the half-shaft and spline shaft rotatably disposed at both ends of the outer casing.

[0007] Preferably, a bearing is installed between the splined hub and the outer casing, and the electromagnetic component is fixedly assembled in the outer casing.

[0008] Preferably, the outer wall of the splined hub is provided with an external spline, and the inner ring of the meshing hub is provided with an internal spline that matches the external spline.

[0009] Preferably, the end of the engagement hub away from the electromagnetic component is provided with an end spline, and the inner wall of the spline shaft is provided with a spline groove adapted to the end spline.

[0010] Preferably, the middle portion of the spline shaft extends into the spline hub, and a needle roller bearing is installed between the spline shaft and the spline hub.

[0011] Preferably, a retaining ring is fixedly embedded on the spline shaft, and the retaining ring abuts against one end of the needle roller bearing so that the needle roller bearing is kept in a preset position.

[0012] Preferably, the outer casing is fitted with fixing bolts.

[0013] Preferably, the electromagnetic component includes a coil housing fixedly disposed within an outer casing, an electromagnetic coil is installed inside the coil housing, and a coil cover is installed on the end face of the coil housing.

[0014] Its beneficial effects are as follows: In this pure electric vehicle disconnection mechanism, when the electromagnetic component is de-energized, the engagement hub is pressed against the splined shaft by the force of the wave spring. The end spline on the engagement hub engages with the spline groove on the splined shaft, allowing the torque on the splined shaft to be transmitted to the engagement hub. Simultaneously, the engagement hub and the splined hub, through the engagement of the inner and outer splines, transmit the torque to the half-shaft, driving the vehicle forward. When the electromagnetic component is energized, under the action of electromagnetic force, the engagement hub overcomes the force of the wave spring and moves to the left, disconnecting the engagement hub from the splined shaft. At this time, the torque on the splined shaft cannot be transmitted to the splined hub, the half-shaft is not under force, and the wheel has no torque input, thus realizing the disconnection and closure of the transmission. The structure is simple and compact, and the key transmission parts use spline connections, resulting in high reliability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0017] In the diagram: 1. Half shaft; 2. Bearing; 3. Outer housing; 4. Coil housing; 5. Electromagnetic coil; 6. Coil cover; 7. Wave spring; 8. Engaging hub; 9. Splined hub; 10. Splined shaft; 11. Needle roller bearing; 12. Retaining ring; 13. Fixing bolt. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] This utility model discloses a disconnection mechanism for a pure electric vehicle, according to the attached... Figure 1 As shown, it includes a half shaft 1 and a spline shaft 10. A spline hub 9 is connected to the outer surface of the half shaft 1. A meshing hub 8 is connected to the outer wall of the spline hub 9. An end spline is provided at the end of the meshing hub 8. A spline groove adapted to the end spline is provided on the inner wall of the spline shaft 10. An electromagnetic component is provided at one end of the meshing hub 8 near the half shaft 1. A wave spring 7 is provided between the electromagnetic component and the meshing hub 8. When the electromagnetic component is turned off, the engagement hub 8 approaches the spline shaft 10 under the action of the wave spring 7, so that the end spline engages with the spline groove for transmission. The electromagnetic component is activated, attracting the engagement hub 8 to move towards one end of the electromagnetic component, so that the end spline separates from the spline groove and disengages the transmission.

[0021] It also includes an outer casing 3, a half-shaft 1 and a splined shaft 10, which are rotatably mounted at both ends of the outer casing 3.

[0022] A bearing 2 is installed between the splined hub 9 and the outer casing 3, and the electromagnetic component is fixedly assembled in the outer casing 3.

[0023] The outer wall of the splined hub 9 is provided with an external spline, and the inner ring of the meshing hub 8 is provided with an internal spline that matches the external spline. Through the cooperation of the external spline and the internal spline, the meshing hub 8 can slide along the axial direction of the splined hub 9, while the two sets always maintain the transmission state.

[0024] The middle part of the spline shaft 10 extends into the spline hub 9, and a needle roller bearing 11 is installed between the spline shaft 10 and the spline hub 9. A retaining ring 12 is fixedly embedded on the spline shaft 10, and the retaining ring 12 abuts against one end of the needle roller bearing 11 so that the needle roller bearing 11 is kept in a preset position so that the spline shaft 10 and the spline hub 9 always remain concentric, avoiding misalignment during transmission and causing the spline to dislodge. At the same time, when not in operation, the needle roller bearing 11 reduces the frictional resistance between the two during relative rotation.

[0025] The outer casing 3 is equipped with fixing bolts 13 for mounting to the electric drive assembly housing.

[0026] The electromagnetic component includes a coil housing 4 fixedly installed in the outer casing 3, an electromagnetic coil 5 installed inside the coil housing 4, and a coil cover 6 installed on the end face of the coil housing 4.

[0027] Working principle: When the device is in use, the outer shell 3 is fixed to the electric drive assembly housing with fixing bolts 13. When the electromagnetic component is de-energized, the engagement hub 8 is pressed against the spline shaft 10 by the wave spring force 7. The end spline on the engagement hub 8 engages with the spline groove on the spline shaft 10. At this time, the torque on the spline shaft 10 can be transmitted to the engagement hub 8. At the same time, the engagement hub 8 and the spline hub 9 are connected by the inner spline and the outer spline to transmit the torque to the half shaft 1, driving the vehicle forward. When the electromagnetic component is energized, under the action of electromagnetic force, the engagement hub 8 overcomes the wave spring force 7 and moves to the left. The engagement hub causes 8 to disconnect from the spline shaft 10. At this time, the torque on the spline shaft 10 cannot be transmitted to the spline hub 9, the half shaft 1 is not under force, and the wheel has no torque input. This allows for the opening and closing of the transmission, resulting in a simple and compact structure. Furthermore, the key transmission components utilize spline connections, ensuring high reliability.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A disconnection mechanism for a pure electric vehicle, comprising a half-shaft (1) and a splined shaft (10), characterized in that, The outer surface of the half shaft (1) is connected to a splined hub (9), and the outer wall of the splined hub (9) is connected to a meshing hub (8). The end of the meshing hub (8) is provided with an end spline. The inner wall of the splined shaft (10) is provided with a spline groove adapted to the end spline. An electromagnetic component is provided at one end of the meshing hub (8) near the half shaft (1), and a wave spring (7) is provided between the electromagnetic component and the meshing hub (8). When the electromagnetic component is turned off, the meshing hub (8) approaches the spline shaft (10) under the action of the wave spring (7) so that the end spline engages with the spline groove for transmission; The electromagnetic component is activated to attract the engagement hub (8) to move toward one end of the electromagnetic component, so that the end spline and spline groove are separated and the transmission is released.

2. The disconnection mechanism for a pure electric vehicle according to claim 1, characterized in that, It also includes an outer casing (3), with the half shaft (1) and spline shaft (10) rotatably disposed at both ends of the outer casing (3).

3. The disconnection mechanism for a pure electric vehicle according to claim 2, characterized in that, A bearing (2) is installed between the splined hub (9) and the outer shell (3), and the electromagnetic component is fixedly assembled in the outer shell (3).

4. The disconnection mechanism for a pure electric vehicle according to claim 1, characterized in that, The outer wall of the splined hub (9) is provided with an external spline, and the inner ring of the meshing hub (8) is provided with an internal spline that matches the external spline.

5. A disconnection mechanism for a pure electric vehicle according to claim 1, characterized in that, The middle part of the spline shaft (10) extends into the spline hub (9), and a needle roller bearing (11) is installed between the spline shaft (10) and the spline hub (9).

6. A disconnection mechanism for a pure electric vehicle according to claim 5, characterized in that, A retaining ring (12) is fixedly embedded on the spline shaft (10). The retaining ring (12) abuts against one end of the needle roller bearing (11) so that the needle roller bearing (11) is kept in a preset position.

7. A disconnection mechanism for a pure electric vehicle according to claim 2, characterized in that, The outer casing (3) is fitted with fixing bolts (13).

8. A disconnection mechanism for a pure electric vehicle according to claim 3, characterized in that, The electromagnetic component includes a coil housing (4) fixedly disposed in the outer casing (3), an electromagnetic coil (5) is installed inside the coil housing (4), and a coil cover (6) is installed on the end face of the coil housing (4).

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