Power disconnecting mechanism and automobile

Abstract

The utility model discloses a power disconnecting mechanism and an automobile, the power disconnecting mechanism comprises a gear transmission assembly, an output shaft, an input shaft and a disconnecting assembly, the gear transmission assembly comprises a first end face tooth and a second end face tooth; the output shaft is connected with the first end face teeth. The input shaft is connected with the second end face tooth. The first end face tooth and the second end face tooth are located between the output shaft and the input shaft. The disconnection assembly comprises a worm gear, a worm and a driving part, the worm gear is in transmission connection with the worm, the worm is connected with the first end face teeth, and the driving part is used for driving the worm gear to rotate so that the worm gear can drive the worm to move and push the first end face teeth to move in the direction close to or away from the second end face teeth, and the first end face teeth and the second end face teeth can be engaged or disengaged; according to the utility model, the problem of excessive disconnection or tooth collision in the power disconnection or power connection process of the power disconnection mechanism is avoided, the stability and the safety are improved, and the driving safety is ensured.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle wheel drive technology, and in particular to a power disconnection mechanism and an automobile. Background Technology

[0002] Electric vehicles (EVs) are vehicles powered by an onboard power source, using electric motors to drive the wheels, and meeting all road traffic and safety regulations. Due to their relatively smaller environmental impact compared to traditional vehicles, their prospects are widely considered promising. Current EVs generally use one drive motor or four hub motors for propulsion. When four-wheel drive is not needed, EVs can switch to two-wheel drive by disconnecting one set of drive power. However, existing EVs often experience excessive disconnection or gear collisions during these power disconnection or connection processes, which can damage the EV's power system, such as causing wear on the reducer gears and drive half-shaft gears. Utility Model Content

[0003] The main purpose of this utility model is to propose a power disconnection mechanism and a car, which aims to solve the problem that existing electric vehicle power disconnection mechanisms often have problems such as excessive disconnection or tooth collision during the power disconnection or power connection process.

[0004] To achieve the above objectives, this utility model proposes a power disconnection mechanism, characterized in that the power disconnection mechanism comprises:

[0005] A gear transmission assembly, the gear transmission assembly including a first end face tooth and a second end face tooth;

[0006] Output shaft, the output shaft being connected to the first end face tooth;

[0007] An input shaft is connected to the second end face tooth, and the first end face tooth and the second end face tooth are located between the output shaft and the input shaft;

[0008] A disconnecting assembly includes a worm gear, a worm, and a driving member. The worm gear and the worm are connected by a transmission. The worm is connected to the first end face tooth. The driving member is used to drive the worm gear to rotate, so that the worm gear drives the worm to move and pushes the first end face tooth to move closer to or away from the second end face tooth, so that the first end face tooth and the second end face tooth mesh or disengage.

[0009] In one embodiment, the gear transmission assembly further includes a gear hub sleeve located between the first end face tooth and the output shaft. The first end face tooth is connected to the output shaft via the gear hub sleeve. The disconnection assembly further includes a shift fork mounted on the worm gear and connected to the gear hub sleeve. The worm gear is used to push the gear hub sleeve via the shift fork, so that the gear hub sleeve drives the first end face tooth to move towards or away from the second end face tooth.

[0010] In one embodiment, the gear hub sleeve has a recessed portion formed along its circumference, and the end of the shift fork away from the worm extends into the recessed portion.

[0011] In one embodiment, the disconnecting component further includes an elastic element located within the recess, the two ends of the elastic element abutting against the inner wall of the recess and the fork, respectively.

[0012] In one embodiment, the elastic element is a disc spring.

[0013] In one embodiment, the width of the recess is 15mm to 20mm.

[0014] In one embodiment, the power disconnect mechanism further includes a sensor disposed near the shift fork, the sensor being used to sense the position information of the shift fork.

[0015] In one embodiment, the output shaft of the drive member is perpendicular to the worm, the worm wheel is sleeved outside the output shaft of the drive member, and the worm is arranged parallel to the output shaft.

[0016] In one embodiment, the lead angle of the worm is greater than the equivalent friction angle of the worm wheel.

[0017] This utility model also proposes an automobile that applies the aforementioned power disconnection mechanism.

[0018] The technical solution of this utility model includes a gear transmission assembly, an output shaft, an input shaft, and a disconnection assembly. The gear transmission assembly includes a first end face tooth and a second end face tooth. The disconnection assembly includes a worm wheel, a worm, and a driving component. By using the driving component to drive the worm wheel to rotate, the worm wheel drives the worm to move and pushes the first end face tooth to move closer to or further away from the second end face tooth, so that the first end face tooth and the second end face tooth mesh or disengage. When the load applied to the worm wheel attempts to rotate the worm, the worm can move a small distance, but after moving a small distance, the worm will not move and will remain locked. By converting the rotational motion of the worm wheel into a small linear displacement of the worm, and by utilizing the self-locking characteristics of the worm wheel and the worm, it is also ensured that the first end face tooth and the second end face tooth will not excessively abut or disengage, thereby preventing the problem of excessive disengagement or collision of the first end face tooth and the second end face tooth during the power disconnection or power connection process. Attached Figure Description

[0019] 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 the structures shown in these drawings without creative effort.

[0020] Figure 1 A schematic diagram of an embodiment of the power disconnection mechanism provided by this utility model;

[0021] Explanation of icon numbers:

[0022] 100. Power disconnection mechanism; 1. Gear transmission assembly; 11. First end face tooth; 12. Second end face tooth; 13. Gear hub sleeve; 14. Shift fork; 131. Recess; 15. Elastic element; 2. Output shaft; 3. Input shaft; 4. Disconnection assembly; 41. Worm gear; 42. Worm; 43. Drive element; 5. Sensor.

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] Please see Figure 1 This utility model proposes a power disconnection mechanism 100, which includes a gear transmission assembly 1, an output shaft 2, an input shaft 3, and a disconnection assembly 4. The gear transmission assembly 1 includes a first end face tooth 11 and a second end face tooth 12; the output shaft 2 is connected to the first end face tooth 11; the input shaft 2 is connected to the second end face tooth 12, and the first end face tooth 11 and the second end face tooth 12 are located between the output shaft 2 and the input shaft 2; the disconnection assembly 4 includes a worm wheel 41, a worm 42, and a driving member 43. The worm wheel 41 and the worm 42 are connected by a transmission, and the worm 42 is connected to the first end face tooth 11. The driving member 43 is used to drive the worm wheel 41 to rotate, so that the worm wheel 41 drives the worm 42 to move and push the first end face tooth 11 to move closer to or away from the second end face tooth 12, so that the first end face tooth 11 and the second end face tooth 12 mesh or disengage.

[0028] In this embodiment, the output shaft 2 can be a wheel half-shaft, and the output shaft 2 is connected to the wheel; the input shaft 2 can be a reducer half-shaft, and the input shaft 2 is connected to the reducer. The gear transmission assembly 1 includes a first end face tooth 11 and a second end face tooth 12. The first end face tooth 11 is connected to the output shaft 2, and the second end face tooth 12 is connected to the input shaft 2. The first end face tooth 11 and the second end face tooth 12 are adapted to each other and can mesh with each other. The disconnecting component 4 is used to engage or disengage the first end face tooth 11 and the second end face tooth 12. The disconnecting component 4 includes a worm gear 41, a worm 42, and a driving member 43. The driving member 43 can be a motor. The driving member 43 is connected to the worm gear 41 and drives the worm gear 41 to rotate. When the first end face tooth 11 and the second end face tooth 12 are disengaged, the driving member 43 drives the worm gear 41 to rotate, causing the worm gear 41 to drive the worm 42 and push the first end face tooth 11 towards the second end face tooth 12, so that the first end face tooth 11 and the second end face tooth 12 abut and engage. When the first end face tooth 11 and the second end face tooth 12 need to disengage, the driving member 43 drives the worm gear 41 to rotate in the opposite direction, causing the worm gear 41 to drive the worm 42 and push the first end face tooth 11 away from the second end face tooth 12, so that the first end face tooth 11 and the second end face tooth 12 disengage. In this embodiment, the power disconnection mechanism 100 drives the worm gear 41 to rotate via the drive member 43, so that the worm gear 41 drives the worm 42 to move. When the load applied to the worm gear 41 attempts to rotate the worm 42, the worm 42 can move a small distance, but after moving a small distance, the worm 42 will be unable to move and will remain locked. By converting the rotational motion of the worm gear 41 into a small linear displacement of the worm 42, and by utilizing the self-locking characteristics of the worm gear 41 and the worm 42, it is also ensured that the first end face teeth 11 and the second end face teeth 12 will not excessively abut or excessively disengage, thereby preventing the problem of excessive disengagement or collision of the first end face teeth 11 and the second end face teeth 12 during the power disconnection or power connection process of the power disconnection mechanism 100.

[0029] In one embodiment, the gear transmission assembly 1 further includes a gear hub sleeve 13, which is located between the first end face tooth 11 and the output shaft 2. The first end face tooth 11 is connected to the output shaft 2 through the gear hub sleeve 13. The disconnect assembly 4 further includes a shift fork 14, which is mounted on the worm gear 42 and connected to the gear hub sleeve 13. The worm gear 42 is used to push the gear hub sleeve through the shift fork 14 so that the gear hub sleeve drives the first end face tooth 11 to move closer to or further away from the second end face tooth 12. In this embodiment, the gear hub sleeve 13 is located between the first end face tooth 11 and the output shaft 2. One end of the gear hub sleeve 13 is connected to the first end face tooth 11, and the other end is connected to the output shaft 2, so that the first end face tooth 11 is connected to the output shaft 2. The shift fork 14 is connected to the gear hub sleeve 13, so that the first end face tooth 11 is connected to the worm gear 42 through the gear hub sleeve 13 and the shift fork 14. Through the linear displacement of the worm gear 42, the shift fork 14 is driven to move the gear hub sleeve 13, and the gear hub sleeve 13 drives the first end face tooth 11 to move closer to or further away from the second end face tooth 12, which can precisely control the engagement or disengagement of the first end face tooth 11 and the second end face tooth 12. By setting the shift fork 14, the first end face tooth 11 and the second end face tooth 12 can be more reliably aligned and engaged, thereby reducing engagement errors and wear.

[0030] In one embodiment, the gear hub sleeve 13 has a recess 131 formed along its circumference, and the end of the shift fork 14 away from the worm gear 42 extends into the recess 131. In this embodiment, due to the presence of the recess 131, the shift fork 14 can undergo relative displacement within the recess 131 without hindering the gear hub sleeve 13 from rotating with the input shaft 2.

[0031] Based on the above embodiments, the disconnecting component 4 further includes an elastic element 15, which is located within the recess 131. Both ends of the elastic element 15 abut against the inner wall of the recess 131 and the shift fork 14, respectively. In this embodiment, when the shift fork 14 pushes the gear hub sleeve 13 and the first end face tooth 11 towards the second end face tooth 12, the elastic element 15 is compressed. By providing the elastic element 15, it means that the shift fork 14 does not need to push the gear hub sleeve 13 into place all at once. The elastic element 15 relies on its elastic force to drive the gear meshing, allowing for a certain amount of fine-tuning space during meshing of the first end face tooth 11 and the second end face tooth 12, thereby accommodating minor alignment errors and reducing wear between the first end face tooth 11 and the second end face tooth 12.

[0032] Based on the above embodiments, the elastic element 15 is a disc spring. In this embodiment, the elastic element 15 is preferably a disc spring, which enables the elastic element 15 to have high stiffness and load-bearing capacity, and can effectively transmit and bear large loads. In addition, the design of the disc spring is relatively compact. The disc spring is placed in the recess 131 so that the disc spring 131 can provide high elastic force in a limited space.

[0033] In other embodiments, the elastic element 15 may also be a spring or a rubber elastic element 15, which is not limited in this specification.

[0034] In one embodiment, the power disconnect mechanism 100 further includes a sensor 5, which is disposed near the shift fork 14 and is used to sense the position information of the shift fork 14. In this embodiment, by setting the sensor 5 to sense the position information of the worm gear 42, the sensor 5 can send the position information of the shift fork 14 to an external control system to more accurately control the rotational speed of the drive component 43, thereby ensuring precise engagement and disengagement of the first end face tooth 11 and the second end face tooth 12.

[0035] In one embodiment, the output shaft 2 of the drive member 43 is perpendicular to the worm gear 42, the worm wheel 41 is sleeved outside the output shaft 2 of the drive member 43, and the worm gear 42 is arranged parallel to the output shaft 2. This makes the power disconnection mechanism 100 in this embodiment more compact and space-saving.

[0036] In one embodiment, the lead angle of the worm 42 is greater than the equivalent friction angle of the worm wheel 41. In this embodiment, when the lead angle of the worm 42 is greater than the equivalent friction angle of the worm wheel 41, it can be ensured that the worm wheel 41 can drive the worm 42 to achieve linear movement during rotation, so that the worm 42 can move a certain distance.

[0037] This utility model also proposes an automobile that incorporates the aforementioned power disconnection mechanism 100. The specific structure of this automobile is as described in the above embodiments. Since this automobile adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0038] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A power disconnection mechanism, characterized in that, The power disconnect mechanism includes: A gear transmission assembly, the gear transmission assembly including a first end face tooth and a second end face tooth; Output shaft, the output shaft being connected to the first end face tooth; An input shaft is connected to the second end face tooth, and the first end face tooth and the second end face tooth are located between the output shaft and the input shaft; A disconnecting assembly includes a worm gear, a worm, and a driving member. The worm gear and the worm are connected by a transmission. The worm is connected to the first end face tooth. The driving member is used to drive the worm gear to rotate, so that the worm gear drives the worm to move and pushes the first end face tooth to move closer to or away from the second end face tooth, so that the first end face tooth and the second end face tooth mesh or disengage.

2. The power disconnection mechanism as described in claim 1, characterized in that, The gear transmission assembly further includes a gear hub sleeve located between the first end face tooth and the output shaft. The first end face tooth is connected to the output shaft through the gear hub sleeve. The disconnection assembly further includes a shift fork mounted on the worm gear and connected to the gear hub sleeve. The worm gear is used to push the gear hub sleeve through the shift fork, so that the gear hub sleeve drives the first end face tooth to move closer to or further away from the second end face tooth.

3. The power disconnection mechanism as described in claim 2, characterized in that, The gear hub sleeve has a recessed portion formed along its circumference, and the end of the shift fork away from the worm extends into the recessed portion.

4. The power disconnection mechanism as described in claim 3, characterized in that, The disconnecting assembly further includes an elastic element located within the recess, with both ends of the elastic element abutting against the inner wall of the recess and the fork, respectively.

5. The power disconnection mechanism as described in claim 4, characterized in that, The elastic element is a disc spring.

6. The power disconnection mechanism as described in claim 4, characterized in that, The width of the recess is 15mm to 20mm.

7. The power disconnection mechanism as described in claim 2, characterized in that, The power disconnect mechanism also includes a sensor located near the shift fork, which is used to sense the position information of the shift fork.

8. The power disconnection mechanism as described in claim 1, characterized in that, The output shaft of the drive component is perpendicular to the worm, the worm wheel is sleeved outside the output shaft of the drive component, and the worm is arranged parallel to the output shaft.

9. The power disconnection mechanism as described in claim 1, characterized in that, The lead angle of the worm is greater than the equivalent friction angle of the worm wheel.

10. A car, characterized in that, The automotive application has a power disconnect mechanism as described in any one of claims 1 to 9.

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