Gear system and vehicle

Abstract

The utility model provides a gear system and a vehicle. The gear system comprises a first gear assembly and a second gear assembly which are meshed with each other. The first gear assembly and the second gear assembly each comprise a main gear, a compensation gear and an elastic piece. Each main gear comprises a spoke and main meshing teeth arranged on the spoke, a hub is arranged on the axial end face of each spoke, and the main meshing teeth of the first gear assembly are meshed with the main meshing teeth of the second gear assembly. Each compensation gear is installed on the corresponding hub and can rotate relative to the corresponding hub. Each compensation gear is provided with auxiliary meshing teeth, and the auxiliary meshing teeth of the first gear assembly are meshed with the auxiliary meshing teeth of the second gear assembly. Each elastic piece is installed on the corresponding hub, the two ends of each elastic piece abut against the corresponding hub and the corresponding compensation gear respectively, the corresponding compensation gear is forced to deflect and be pre-tightened, auxiliary meshing teeth of the first gear assembly and the second gear assembly abut against each other under the action of the corresponding elastic pieces, gear gaps are eliminated, noise is avoided, and abnormal sound is reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile drive technology, and in particular to a gear system and a vehicle. Background Art

[0002] The electric drive powertrain is an important part of pure electric vehicles. When the input shaft speed fluctuates, the speed of the driving gear fluctuates accordingly, while the unloaded passive gear has inertia and its speed does not change at the same time, which results in a speed difference. In addition, there is a side clearance between the gear pairs, and the speed difference causes the two teeth to collide and generate noise. Gear knocking noise is also one of the typical noise types of vehicles, which seriously reduces driving comfort.

[0003] At present, the noise problem can be reduced by reducing the gear backlash, optimizing the manufacturing process and other ways. However, eliminating the gear backlash will also bring a series of effects and hazards, leading to unstable transmission and aggravated gear whistling; if the gear pair backlash is too small, a lot of wear and friction will occur between the gears, thus shortening the life of the reducer. Therefore, it is necessary to ensure a reasonable gear backlash, ensure that a lubricating oil film of sufficient thickness is formed between the meshing tooth profiles, and compensate for manufacturing and installation errors, as well as thermal deformation and other adverse effects on gear transmission. Therefore, it is necessary to improve the existing gear system. Utility Model Content

[0004] The purpose of the present application is to provide a gear system, thereby overcoming the problems of heavy weight and high cost of the reducer.

[0005] In one aspect of the present application, a gear system is provided, which includes a first gear assembly and a second gear assembly meshing with each other. The first gear assembly and the second gear assembly each include a main gear, a compensation gear and an elastic member. Each of the main gears includes a spoke and a main meshing tooth arranged on the spoke, and a hub is arranged on the axial end face of each spoke, and the main meshing teeth of the first gear assembly and the second gear assembly mesh with each other. Each of the compensation gears is mounted on the corresponding hub and can rotate relative to the corresponding hub. Each of the compensation gears is provided with a secondary meshing tooth, and the secondary meshing teeth of the first gear assembly and the second gear assembly mesh with each other. Each of the elastic members is mounted on the corresponding hub, and the two ends of each of the elastic members respectively abut against the corresponding hub and the corresponding compensation gear, forcing the corresponding compensation gear to deflect and pre-tighten, so that the secondary meshing teeth of the first gear assembly and the second gear assembly abut against each other under the action of the corresponding elastic member.

[0006] Further, each of the compensation gears includes a toothed disc, the auxiliary meshing teeth are arranged on the corresponding toothed disc, the diameter of each toothed disc and the corresponding spoke are the same, and the parameters of each auxiliary meshing tooth and the corresponding main meshing tooth are the same.

[0007] Furthermore, each of the main gears is provided with a protrusion, each of the compensation gears is provided with a mounting groove, each of the protrusions is accommodated in the corresponding mounting groove, each of the elastic members is installed in the corresponding mounting groove, and both ends of each of the elastic members respectively abut against the corresponding protrusion and the inner wall of the mounting groove.

[0008] Furthermore, the protrusion is an arc-shaped protrusion arranged on the circumferential surface of the hub, each of the compensation gears is provided with a mounting hole, and the mounting groove is an arc-shaped groove surrounding the hub formed by further recessing the inner wall of the mounting hole, the arc length of the mounting groove is greater than the arc length of the protrusion, and the elastic member is arranged in the mounting groove.

[0009] Furthermore, the first gear assembly and the second gear assembly are also provided with a limit ring, which is installed on the wheel hub or the compensation gear and at least partially covers the installation groove and is stopped by the elastic member.

[0010] Furthermore, the wheel hub is also provided with a fixing groove, which is arranged at one end of the wheel hub away from the main meshing teeth, and the limit ring is fixedly installed in the fixing groove and abuts against the end surface of the compensation gear away from the main meshing teeth.

[0011] Furthermore, the distance from the axial end surface of the spoke facing the hub to the fixing groove is equal to the thickness of the compensation gear.

[0012] Furthermore, the limit retaining ring is an open O-shape, and the limit retaining ring is fixedly installed in the fixing groove by a fastener, and the limit retaining ring abuts against the inner wall of the fixing groove.

[0013] Furthermore, the elastic member of the first gear assembly causes the compensation gear to deflect in a first direction relative to the main gear, and the elastic member of the second gear assembly causes the compensation gear to deflect in a second direction relative to the main gear, and the first direction and the second direction are opposite.

[0014] Furthermore, the present application also provides a vehicle, which includes the above-mentioned gear system.

[0015] A gear system of the present application has the following beneficial effects: the gear system provided by the present application comprises a first gear assembly and a second gear assembly meshing with each other. The first gear assembly and the second gear assembly each comprise a main gear, a compensation gear and an elastic member. Each main gear comprises a spoke and a main meshing tooth arranged on the spoke, and a hub is arranged on the axial end face of each spoke, and the main meshing teeth of the first gear assembly and the second gear assembly mesh with each other. Each compensation gear is mounted on a corresponding hub and can rotate relative to the corresponding hub. Each compensation gear is provided with a secondary meshing tooth, and the secondary meshing teeth of the first gear assembly and the second gear assembly mesh with each other. Each elastic member is mounted on a corresponding hub, and the two ends of each elastic member respectively abut against the corresponding hub and the corresponding compensation gear, forcing the corresponding compensation gear to deflect and pre-tighten, and the main gear and the compensation gear can be staggered at a certain angle, so that the secondary meshing teeth of the first gear assembly and the second gear assembly abut against each other under the action of the corresponding elastic member, and fit closely together, eliminating the gear gap, and avoiding the collision of the compensation gears of the first gear assembly and the second gear assembly, and generating noise. Furthermore, when the input speed of the driving motor fluctuates or the motor torque switches between positive and negative, the elastic member can buffer the impact of the gear meshing process, thereby eliminating knocking, reducing abnormal noise, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is an exploded structural schematic diagram of the gear assembly of the present application, including a main gear and a compensation gear;

[0018] Figure 2 is a front view of the gear assembly;

[0019] Figure 3 yes Figure 1 A front view of the main gear described in;

[0020] Figure 4 yes Figure 1 A side view of the main gear described in

[0021] Figure 5 yes Figure 1 Front view of the compensation gear described in .

[0022] Description of reference numerals:

[0023] 1. Main gear; 2. Compensation gear; 3. Elastic part; 4. Limiting ring;

[0024] 11. Spoke; 12. Main meshing teeth; 13. Hub; 14. Bump; 15. Fixing groove; 21. Auxiliary meshing teeth; 22. Tooth plate; 23. Mounting groove; 24. Mounting hole. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0026] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0028] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0029] See also Figures 1 to 5The present application provides a gear system, which includes a first gear assembly (not shown) and a second gear assembly (not shown) that mesh with each other. The first gear assembly and the second gear assembly each include a main gear 1, a compensation gear 2 and an elastic member 3. Each main gear 1 includes a spoke 11 and a main meshing tooth 12 arranged on the spoke 11, and a hub 13 is arranged on the axial end face of each spoke 11. The main meshing teeth 12 of the first gear assembly and the second gear assembly mesh with each other. Each compensation gear 2 is mounted on the corresponding hub 13 and can rotate relative to the corresponding hub 13. Each compensation gear 2 is provided with a secondary meshing tooth 21, and the secondary meshing teeth 21 of the first gear assembly and the second gear assembly mesh with each other. Each elastic member 3 is mounted on the corresponding wheel hub 13, and the two ends of each elastic member 3 are respectively pressed against the corresponding wheel hub 13 and the corresponding compensation gear 2, forcing the corresponding compensation gear 2 to deflect and pre-tighten, so that the main gear 1 and the compensation gear 2 can be staggered at a certain angle, so that the auxiliary meshing teeth 21 of the first gear assembly and the second gear assembly press against each other under the action of the corresponding elastic member 3, fit tightly together, eliminate the gear gap, and avoid the first gear assembly and the second gear assembly The compensation gear 2 collides and generates noise. Further, when there is a speed fluctuation in the input speed of the drive motor or the positive and negative switching process of the motor torque, the elastic member 3 can buffer the impact of the gear meshing process, thereby eliminating the knocking phenomenon, reducing abnormal noise, and improving the user experience.

[0030] In some embodiments, preferably, each compensation gear 2 includes a toothed disc 22, and the auxiliary meshing teeth 21 are arranged on the corresponding toothed disc 22. The diameter of each toothed disc 22 and the corresponding spoke 11 are the same, and the parameters of each auxiliary meshing tooth 21 and the corresponding main meshing tooth 12 are the same. The compensation gear 2 and the main gear 1 have the same diameter, and the width and tooth groove width of each auxiliary meshing tooth 21 and the corresponding main meshing tooth 12 are the same, that is, the auxiliary meshing teeth 21 and the main meshing teeth 12 correspond one to one, and the driving gear and the compensation gear 2 are coaxially arranged, and the driving gear drives the compensation gear 2 to drive.

[0031] For details, see Figure 3, each main gear 1 is provided with a protruding block 14, each compensation gear 2 is provided with a mounting groove 23, each protruding block 14 is accommodated in the corresponding mounting groove 23, each elastic member 3 is installed in the corresponding mounting groove 23, and the two ends of each elastic member 3 are respectively pressed against the corresponding protruding block 14 and the inner wall of the mounting groove 23. The protruding block 14 can be arranged on the spoke 11 of the main gear 1 or on the hub 13, the protruding block 14 is correspondingly engaged with the mounting groove 23, and one end of the protruding block 14 is pressed against one side of the mounting groove 23. The elastic member 3 is correspondingly installed in the mounting groove 23 and pressed against the inner wall of the mounting groove 23 and the protruding block 14, so that the main gear 1 and the compensation gear 2 are staggered at a certain angle. When the first gear assembly and the second gear assembly are engaged, the corresponding compensation gears 2 are also clamped together to reduce the gear clearance. Furthermore, the setting of the elastic member 3 can also play a buffering role, attenuate vibration, eliminate gear knocking noise, and improve the life of the gear system.

[0032] Preferably, refer to Figures 2 to 5 The protrusion 14 is an arc-shaped protrusion 14 arranged around the circumference of the hub 13. Each compensation gear 2 is provided with a mounting hole 24. The mounting groove 23 is an arc-shaped groove around the hub 13 formed by further recessing the inner wall of the mounting hole 24. The arc length of the mounting groove 23 is greater than the arc length of the protrusion 14. The elastic member 3 is arranged in the mounting groove 23. The diameter of the mounting hole 24 is the same as the diameter of the hub 13 of the main gear 1. The compensation gear 2 is mounted on the main gear 1 through the mounting hole 24, and the arc-shaped protrusion 14 is engaged with the mounting groove 23. The arc length of the mounting groove 23 accounts for one-third to one-half of the circumference of the mounting hole 24, and the arc length of the arc-shaped protrusion 14 accounts for one-third to one-half of the circumference of the mounting hole 24, which can be set according to actual conditions. Furthermore, when the elastic member 3 is installed in the mounting groove 23, it is ensured that the length of the elastic member 3 after compression is less than the remaining space length of the mounting groove 23, and at the same time, the width of the mounting groove 23 is greater than the diameter of the elastic member 3, so that after the elastic member 3 is installed, the two ends are respectively against the protrusion 14 and the inside of the mounting groove 23, and are in a compressed state, so that the compensation gear 2 is deflected and pre-tightened.

[0033] Please continue to refer to Figure 1 and Figure 2 The first gear assembly and the second gear assembly are further provided with a limit ring 4, which is mounted on the wheel hub 13 or the compensation gear 2, and at least partially covers the mounting groove 23 and stops at the elastic member 3. The limit ring 4 can be clamped on the wheel hub 13, or fixedly mounted on the compensation gear 2, presses the compensation gear 2 and partially covers the mounting groove 23, axially presses the elastic member 3, prevents the elastic member 3 from coming out, and ensures the stability of the gear system.

[0034] Further, see Figure 4The hub 13 is also provided with a fixing groove 15, which is provided at one end of the hub 13 away from the main meshing teeth 12, and the stop ring 4 is fixedly installed in the fixing groove 15 and abuts against the end surface of the compensation gear 2 away from the main meshing teeth 12. The stop ring 4 is clamped in the fixing groove 15, limiting the displacement of the compensation gear 2 and preventing the compensation gear 2 from loosening.

[0035] Preferably, the distance from the axial end face of the spoke 11 facing the hub 13 to the fixing groove 15 is equal to the thickness of the compensation gear 2, and the compensation gear 2 can be just clamped between the main gear 1 and the limit ring 4 to achieve axial positioning and fixation, thereby ensuring the installation stability of the compensation gear 2.

[0036] Specifically, the limit ring 4 is an open O-shape, and the limit ring 4 is fixedly installed in the fixed groove 15 by fasteners, and the limit ring 4 abuts against the inner wall of the fixed groove 15. Further, the limit ring 4 can also be other shapes, such as U-shaped. The limit ring 4 is clamped in the fixed groove 15 by fasteners, and abuts against the inner wall of the fixed groove 15 to prevent loosening. In addition, the limit ring 4 is coaxially arranged with the elastic member 3, the compensation gear 2 and the main gear 1, and the compensation gear 2 and the elastic member 3 are axially fixed, which is simple to assemble, reduces costs, and ensures the reliability of the gear system.

[0037] In some embodiments, reference Figure 5 The elastic member 3 of the first gear assembly makes the compensation gear 2 deflect in the first direction relative to the main gear 1, and the elastic member 3 of the second gear assembly makes the compensation gear 2 deflect in the second direction relative to the main gear 1, and the first direction and the second direction are opposite. The elastic member 3 of the first gear assembly is clamped at the corresponding installation groove 23 at a when installed, and the elastic member 3 of the second gear assembly is clamped at the corresponding installation groove 23 at b when installed, so that the compensation gear 2 can deflect in the first direction and the second direction respectively, and the compensation gear 2 of the first gear assembly and the second gear assembly are clamped, which reduces the gap between the teeth of the first gear assembly and the second gear assembly, avoids collision between the compensation gears 2, generates noise, improves product quality, and ensures the user experience.

[0038] The present application also provides a vehicle, which includes the above-mentioned gear system.

[0039] In this application, unless otherwise clearly specified and limited, the terms "disposed (provided with)", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the description of this specification, the description of reference terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0041] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made according to the claims and description of the present application should fall within the scope of the present application.

Claims

1. A gear system, characterized in that: The invention comprises a first gear assembly and a second gear assembly meshing with each other, wherein the first gear assembly and the second gear assembly each comprise: Main gears, each of which comprises a spoke and main meshing teeth arranged on the spoke, and a hub is arranged on the axial end surface of each spoke, and the main meshing teeth of the first gear assembly and the second gear assembly mesh with each other; Compensation gears, each of which is mounted on the corresponding wheel hub and can rotate relative to the corresponding wheel hub; each of the compensation gears is provided with auxiliary meshing teeth, and the auxiliary meshing teeth of the first gear assembly and the second gear assembly are meshed with each other; Elastic parts, each of which is installed on the corresponding wheel hub, and both ends of each elastic part respectively abut against the corresponding wheel hub and the corresponding compensation gear, forcing the corresponding compensation gear to deflect and pre-tighten, so that the auxiliary meshing teeth of the first gear assembly and the second gear assembly abut against each other under the action of the corresponding elastic parts.

2. The gear system according to claim 1, characterized in that: Each of the compensation gears comprises a toothed disc, the auxiliary meshing teeth are arranged on the corresponding toothed disc, the diameter of each toothed disc is the same as the diameter of the corresponding spoke, and the parameters of each of the auxiliary meshing teeth are the same as the parameters of the corresponding main meshing teeth.

3. The gear system according to claim 1, characterized in that: A protrusion is protruding from each main gear, and a mounting groove is provided on each compensation gear. Each protrusion is accommodated in the corresponding mounting groove, and each elastic member is installed in the corresponding mounting groove, and both ends of each elastic member respectively abut against the corresponding protrusion and the inner wall of the mounting groove.

4. The gear system according to claim 3, characterized in that: The protrusion is an arc-shaped protrusion arranged on the circumferential surface of the hub, each of the compensation gears is provided with a mounting hole, and the mounting groove is an arc-shaped groove surrounding the hub formed by further recessing the inner wall of the mounting hole. The arc length of the mounting groove is greater than the arc length of the protrusion, and the elastic member is arranged in the mounting groove.

5. The gear system according to any one of claims 3 or 4, characterized in that: The first gear assembly and the second gear assembly are further provided with a limit ring, which is mounted on the wheel hub or the compensation gear and at least partially covers the mounting groove and is stopped by the elastic member.

6. The gear system according to claim 5, characterized in that The wheel hub is also provided with a fixing groove, which is arranged at an end of the wheel hub away from the main meshing teeth. The limit ring is fixedly installed in the fixing groove and abuts against the end surface of the compensation gear away from the main meshing teeth.

7. The gear system according to claim 6, characterized in that The distance from the axial end surface of the spoke facing the hub to the fixing groove is equal to the thickness of the compensation gear.

8. The gear system according to claim 6, characterized in that The limit retaining ring is in an open O-shape and is fixedly installed in the fixing groove by a fastener. The limit retaining ring abuts against the inner wall of the fixing groove.

9. The gear system according to claim 7, characterized in that: The elastic member of the first gear assembly enables the compensation gear to deflect in a first direction relative to the main gear, and the elastic member of the second gear assembly enables the compensation gear to deflect in a second direction relative to the main gear, and the first direction and the second direction are opposite.

10. A vehicle, characterized in that: The vehicle comprises a gear system as claimed in any one of claims 1 to 9 above.

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