Two-stage planetary speed reduction structure of cleat-shaped transmission box body

Abstract

The utility model belongs to the technical field of automobile hub transmission, and particularly relates to a two-stage planetary speed reduction structure of a cleat-shaped transmission box body, which comprises the cleat-shaped transmission box body, a containing cavity is formed between the cleat-shaped transmission box body and the cover plate; the front end of the motor input shaft penetrates through the cover plate, extends into the accommodating cavity and is connected with a first sun gear; a first planetary assembly; a second planetary assembly; the claw-shaped transmission case has the advantages that through matched transmission of the two planet assemblies, the overall transmission of the claw-shaped transmission case can achieve a higher reduction ratio, larger torque output is achieved, loads can be dispersed, the higher loading capacity can be improved, and the transmission efficiency is improved. And the durability and the stability of the whole transmission structure are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile hub transmission, in particular to a two-stage planetary reduction structure of a ram's horn type transmission box. Background Art

[0002] With the rapid development of the automotive industry, the requirements for automotive performance are getting higher and higher, especially in terms of power transmission efficiency, reliability and vehicle handling. As a key part connecting the engine and wheels, the design and function of the wheel hub drive system directly affect the overall performance of the car. In the traditional front wheel hub drive system, the first-stage planetary gear transmission is one of the common ways to achieve power transmission. However, the existing first-stage planetary gear transmission mechanism has several defects, which limits its potential in high-performance automotive applications.

[0003] The first-stage planetary gear transmission usually has a lower reduction ratio, which means that it is difficult to achieve high torque output without increasing the gear size. Due to the structural limitations of the first-stage planetary gear, its load-bearing capacity is limited by the design of the single-stage gear. Under high-load conditions, this may cause gear overload, thereby reducing the life of the transmission system and affecting the reliability of the vehicle, which in turn affects the stability and durability of the entire transmission system. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a two-stage planetary reduction structure of a ram's horn type transmission box to solve the above problems.

[0005] The technical solution of the utility model is implemented as follows: a two-stage planetary reduction structure of a ram-horn type transmission box, comprising:

[0006] Claw-shaped transmission housing;

[0007] A cover plate, a receiving chamber is formed between the ram-horn-shaped transmission box body and the cover plate;

[0008] A bearing seat, the front end of the ram-horn-shaped transmission box is provided with a bearing seat which is communicated with the accommodating chamber and has a through hole;

[0009] A first wheel hub bearing, the first wheel hub bearing is installed in the bearing position;

[0010] A flange shaft head, a shaft sleeve portion of the flange shaft head passes through the through hole and is sleeved with the inner ring of the first hub bearing, the shaft sleeve portion of the flange shaft head is hollow, and the hollow portion forms a connecting shaft hole;

[0011] The reduction gear output shaft, one end of which passes through the connecting shaft hole and is sleeved with the flange shaft head;

[0012] A motor housing, the front end of which is connected to the motor mating surface, the rear end of which is connected to an end cover, and a motor mating surface is provided on the side of the cover plate opposite to the motor housing;

[0013] The motor input shaft is located in the motor housing, and the front end of the motor input shaft passes through the cover plate and extends into the accommodating chamber and is connected to the first sun gear;

[0014] The first planetary assembly includes a first planet carrier located in the accommodating chamber, a first gear ring fixedly mounted on the inner wall of the horn-shaped transmission case, and a plurality of first planetary gears meshed on the inner wall of the first gear ring, wherein the first planetary gear is meshed with the first sun gear on a side away from the first gear ring;

[0015] One end of the first planet carrier is rotatably connected to a first rotating shaft matched with the first planet gear, for providing radial support to the first planet gear, a second rotating shaft is connected and fixed to the middle of the first planet carrier, and one end of the second rotating shaft is connected and fixed to the second sun gear;

[0016] The second planetary assembly includes a second planet carrier located in the accommodating chamber, a second gear ring fixedly mounted on the inner wall of the horn-shaped transmission case, and a plurality of second planetary gears meshed on the inner wall of the second gear ring, and the second planetary gears mesh with the second sun gear on one side away from the second gear ring;

[0017] One end of the second planet carrier is rotatably connected to a third rotating shaft matched with the second planet gear, for providing radial support to the second planet gear;

[0018] One end of the second planet carrier is fixedly connected to the reduction gear output shaft, and the other end is rotatably connected to the second rotating shaft.

[0019] Furthermore, the ram-horn type transmission box body also includes: a ram-horn type structure body, which is installed on the outer shell of the ram-horn type transmission box body.

[0020] Furthermore, the motor input shaft is hollow, and one end of the second rotating shaft extends axially through the hollow part of the motor input shaft to the end cover. The end cover is provided with a second bearing chamber matching with the second rotating shaft, and the second bearing chamber is provided with a second hub bearing adapted to the second rotating shaft.

[0021] Furthermore, at least four first planetary gears and four second planetary gears are respectively provided, and are equidistantly distributed in the circumferential direction.

[0022] Furthermore, the second planet carrier and the reduction gear output shaft are integrally formed and coaxial.

[0023] Furthermore, the front end of the first hub bearing abuts against the bearing seat, and the side of the second planet carrier facing the front end of the horn-shaped transmission box abuts against the rear end of the first hub bearing.

[0024] Further, a brake disc is mounted on the flange shaft head;

[0025] Brake caliper, installed on the horn-shaped transmission housing, used to brake the brake disc;

[0026] Among them, an installation hole matching with the brake caliper is penetratingly opened at the upper end of the horn-shaped transmission box body.

[0027] Furthermore, an installation chamber is provided on the inner wall of the end cover, a resolver is arranged in the installation chamber, and the rotor of the resolver rotates synchronously with the motor input shaft.

[0028] Furthermore, a third bearing chamber is provided on the motor mating surface of the cover plate, a fourth bearing chamber is also provided on the inner wall of the end cover, both ends of the motor input shaft are respectively arranged through the third bearing chamber and the fourth bearing chamber, and a third hub bearing and a fourth hub bearing adapted to the motor input shaft are respectively arranged in the third bearing chamber and the fourth bearing chamber.

[0029] The beneficial effects of the present utility model are as follows:

[0030] Compared with the first-stage planetary transmission structure, the second-stage planetary transmission structure constructed in this application enables the overall transmission of the horn-shaped transmission box body to achieve a higher reduction ratio and a larger torque output through the combined transmission of two sets of planetary components, and can disperse the load bearing to improve the higher load capacity, thereby further improving the durability and stability of the overall transmission structure. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 is a side cross-sectional view of the horn-shaped transmission box body in the specific embodiment of the present utility model;

[0033] Figure 2 is a front cross-sectional view of the horn-shaped transmission box body in the specific embodiment of the present utility model; Specific Embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than 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 efforts belong to the scope of protection of the present utility model.

[0035] As shown in FIGS. 1 to 2, the present utility model discloses a two-stage planetary reduction structure of a horn-shaped transmission box body, including:

[0036] Horn-shaped drive housing 1;

[0037] Cover plate 2, an accommodation chamber is formed between the horn-shaped drive housing 1 and the cover plate 2;

[0038] Bearing position 3, a bearing position 3 communicating with the accommodation chamber and having a through hole is provided at the front end of the horn-shaped drive housing 1;

[0039] First hub bearing 4, the first hub bearing 4 is installed in the bearing position 3;

[0040] Flange shaft head 5, the bushing part of the flange shaft head 5 passes through the through hole and is sleeved with the inner ring of the first hub bearing 4, the bushing part of the flange shaft head 5 is hollow, and this hollow part forms a connecting shaft hole;

[0041] Reduction gear output shaft 6, one end of the reduction gear output shaft 6 passes through the connecting shaft hole and is sleeved with the flange shaft head 5;

[0042] Motor housing 7, a motor mating surface is provided on the side of the cover plate 2 opposite to the motor housing 7, the front end of the motor housing 7 is connected to the motor mating surface, and the rear end is connected with an end cover 71;

[0043] Motor input shaft 8, located inside the motor housing 7, the front end of the motor input shaft 8 passes through the cover plate 2 and extends into the accommodation chamber and is connected with a first sun gear 9;

[0044] First planetary assembly, including a first planet carrier 10 located in the accommodation chamber, a first ring gear 11 fixedly installed on the inner wall of the horn-shaped drive housing 1, and a number of first planet gears 12 meshing on the inner wall of the first ring gear 11, the side of the first planet gear 12 facing away from the first ring gear 11 meshes with the first sun gear 9;

[0045] One end of the first planet carrier 10 is rotatably connected with a first rotating shaft 13 cooperating with the first planet gear 12 for providing radial support to the first planet gear 12, a second rotating shaft 131 is fixedly connected to the middle of the first planet carrier 10, and one end of the second rotating shaft 131 is fixedly connected with a second sun gear 14;

[0046] Second planetary assembly, including a second planet carrier 15 located in the accommodation chamber, a second ring gear 16 fixedly installed on the inner wall of the horn-shaped drive housing 1, and a number of second planet gears 17 meshing on the inner wall of the second ring gear 16, the side of the second planet gear 17 facing away from the second ring gear 16 meshes with the second sun gear 14;

[0047] One end of the second planet carrier 15 is rotatably connected to a third rotating shaft 18 that cooperates with the second planet gear 17 for providing radial support to the second planet gear 17.

[0048] Wherein, one end of the second planet carrier 15 is fixedly connected to the output shaft 6 of the reduction gear, and the other end is rotatably connected to the second rotating shaft 131.

[0049] In this solution, the flange shaft head includes a sleeve portion and a disc portion integrally connected, and the disc portion is used for fixedly connecting with the wheel hub.

[0050] In this solution, both sides of the cover plate are fixedly connected to the horn-shaped transmission box body and the motor housing respectively by screws.

[0051] In this solution, a convex portion is provided on one side of the second planet carrier facing the second rotating shaft, an installation hole cooperating with the convex portion is provided at the end of the second rotating shaft, and a fifth wheel hub bearing is arranged between the convex portion and the installation hole.

[0052] By adopting the above technical solution, compared with the first-stage planetary transmission structure, the second-stage planetary transmission structure constructed in this application enables the overall transmission of the horn-shaped transmission box body to achieve a higher reduction ratio, realize a greater torque output through the cooperative transmission of two groups of planetary components, and can disperse the load bearing to improve the higher load capacity, thereby further improving the durability and stability of the overall transmission structure.

[0053] This embodiment provides a second-stage planetary reduction structure of a horn-shaped transmission box body, which has the following technical features in addition to the technical solution of the above embodiment.

[0054] Further, the horn-shaped transmission box body 1 further includes:

[0055] A horn-shaped structure body, which is installed on the outer shell of the horn-shaped transmission box body 1.

[0056] In this solution, the horn-shaped structure body is integrally formed with the horn-shaped transmission box body 1.

[0057] By adopting the above technical solution, the horn-shaped structure body is in a horn shape and can more effectively bear external forces, thereby improving the stability and durability of the structure. The horn-shaped structure body is used as a connection structure for connecting the driving device to the vehicle frame. Specifically, the horn-shaped structure body is fixedly connected to the chassis part of the vehicle outer frame and can be applied to the front wheels of the vehicle.

[0058] This embodiment provides a second-stage planetary reduction structure of a horn-shaped transmission box body, which has the following technical features in addition to the technical solution of the above embodiment.

[0059] Further, the motor input shaft 8 is hollow, and one end of the second rotating shaft 131 axially penetrates through the hollow part of the motor input shaft 8 and extends to the end cover 71. A second bearing chamber matching the second rotating shaft 131 is provided on the end cover 71, and a second hub bearing adapted to the second rotating shaft 131 is provided in the second bearing chamber.

[0060] By adopting the above technical solution, the load can be dispersed to the end cover, further improving the load capacity of the two planetary assemblies. This embodiment provides a two-stage planetary reduction structure for a horn-shaped transmission housing. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0061] Further, at least four first planet gears 12 and second planet gears 17 are respectively provided, and they are all circumferentially equidistantly distributed.

[0062] By adopting the above technical solution, the load of each planet gear is made more uniform, thereby improving the stability and load-bearing capacity of the entire system.

[0063] This embodiment provides a two-stage planetary reduction structure for a horn-shaped transmission housing. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0064] Further, the second planet carrier 15 is integrally formed and coaxial with the reduction gear output shaft 6.

[0065] By adopting the above technical solution, the stability of power transmission and the load capacity are further improved.

[0066] This embodiment provides a two-stage planetary reduction structure for a horn-shaped transmission housing. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0067] Further, the front end of the first hub bearing 4 abuts against the bearing position 3, and one side of the second planet carrier 15 facing the front end of the horn-shaped transmission housing 1 abuts against the rear end of the first hub bearing 4.

[0068] By adopting the above technical solution, the first hub bearing can be axially abutted and pressed firmly on the bearing position, effectively improving the firmness of the first hub bearing, and further improving the stability of the power output of the horn-shaped transmission housing.

[0069] This embodiment provides a two-stage planetary reduction structure for a horn-shaped transmission housing. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0070] Further, a brake disc 181 is installed on the flange shaft head 5;

[0071] The brake caliper 19 is installed on the horn-shaped transmission housing 1 and is used to brake the brake disc 181.

[0072] Among them, an installation hole matching the brake caliper 19 is penetrated and opened at the upper end of the horn-shaped transmission housing 1.

[0073] By adopting the above technical solution, the hub can achieve stable and reliable braking while improving the space utilization rate.

[0074] This embodiment provides a two-stage planetary reduction structure of a horn-shaped transmission housing. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0075] Furthermore, an installation chamber is provided on the inner wall of the end cover 71, and a resolver 711 is provided in the installation chamber. The rotor of the resolver 711 rotates synchronously with the motor input shaft 8.

[0076] By adopting the above technical solution, accurate speed feedback is provided for the vehicle's power system.

[0077] This embodiment provides a two-stage planetary reduction structure of a horn-shaped transmission housing. In addition to including the technical solutions of the above embodiment, it also has the following technical features.

[0078] Furthermore, a third bearing chamber is provided on the motor mating surface of the cover plate 2, and a fourth bearing chamber is also provided on the inner wall of the end cover 71. Both ends of the motor input shaft 8 are respectively arranged through the third bearing chamber and the fourth bearing chamber, and a third hub bearing 20 and a fourth hub bearing 21 adapted to the motor input shaft 8 are respectively provided in the third bearing chamber and the fourth bearing chamber.

[0079] By adopting the above technical solution, the power output of the transmission housing is smooth, stable and reliable.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A two-stage planetary reduction structure of a ram-horn type transmission housing, characterized in that: include: Claw-shaped transmission housing (1); A cover plate (2), wherein a receiving chamber is formed between the ram-horn-shaped transmission housing (1) and the cover plate (2); A bearing seat (3), wherein the front end of the ram-horn-shaped transmission housing (1) is provided with a bearing seat (3) which is in communication with the accommodating chamber and has a through hole; A first wheel hub bearing (4), the first wheel hub bearing (4) being mounted in the bearing position (3); A flange shaft head (5), wherein a shaft sleeve portion of the flange shaft head (5) passes through the through hole and is sleeved with the inner ring of the first hub bearing (4), and the shaft sleeve portion of the flange shaft head (5) is hollow, and the hollow portion forms a connecting shaft hole; A reduction gear output shaft (6), one end of which passes through the connecting shaft hole and is sleeved with the flange shaft head (5); The motor housing (7) is provided with a motor mating surface on one side of the cover plate (2) opposite to the motor housing (7); the front end of the motor housing (7) is connected to the motor mating surface, and the rear end is connected to an end cover (71); A motor input shaft (8) is located in the motor housing (7), and a front end of the motor input shaft (8) passes through the cover plate (2) and extends into the accommodating chamber and is connected to the first sun gear (9); The first planetary assembly comprises a first planetary carrier (10) located in the accommodating chamber, a first gear ring (11) fixedly mounted on the inner wall of the horn-shaped transmission housing (1), and a plurality of first planetary gears (12) meshed with the inner wall of the first gear ring (11), wherein the first planetary gears (12) mesh with the first sun gear (9) on a side facing away from the first gear ring (11); One end of the first planet carrier (10) is rotatably connected to a first rotating shaft (13) that cooperates with the first planet gear (12) and is used to provide radial support for the first planet gear (12); a second rotating shaft (131) is connected and fixed to the middle of the first planet carrier (10); and one end of the second rotating shaft (131) is connected and fixed to a second sun gear (14); The second planetary assembly comprises a second planetary carrier (15) located in the accommodating chamber, a second gear ring (16) fixedly mounted on the inner wall of the horn-shaped transmission housing (1), and a plurality of second planetary gears (17) meshed with the inner wall of the second gear ring (16), wherein the second planetary gears (17) mesh with the second sun gear (14) on a side facing away from the second gear ring (16); One end of the second planet carrier (15) is rotatably connected to a third rotating shaft (18) that cooperates with the second planet gear (17) and is used to provide radial support for the second planet gear (17); One end of the second planet carrier (15) is fixedly connected to the reduction gear output shaft (6), and the other end is rotationally connected to the second rotating shaft (131).

2. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: The ram-horn type transmission box (1) further comprises: a ram-horn type structure, which is installed on the outer shell of the ram-horn type transmission box (1).

3. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: The motor input shaft (8) is hollow, and one end of the second rotating shaft (131) extends axially through the hollow portion of the motor input shaft (8) to the end cover (71). The end cover (71) is provided with a second bearing chamber matched with the second rotating shaft (131), and a second hub bearing adapted for the second rotating shaft (131) is provided in the second bearing chamber.

4. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: At least four first planetary gears (12) and four second planetary gears (17) are provided respectively, and are equidistantly distributed in the circumferential direction.

5. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: The second planet carrier (15) and the reduction gear output shaft (6) are integrally formed and coaxial.

6. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: The front end of the first wheel hub bearing (4) abuts against the bearing position (3), and the side of the second planet carrier (15) facing the front end of the horn-shaped transmission housing (1) abuts against the rear end of the first wheel hub bearing (4).

7. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: Also includes: A brake disc (181) is mounted on the flange shaft head (5); A brake caliper (19) is mounted on the horn-shaped transmission housing (1) and is used to brake the brake disc (181); A mounting hole matching the brake caliper (19) is provided through the upper end of the ram-horn-shaped transmission housing (1).

8. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: An installation chamber is also provided on the inner wall of the end cover (71), and a rotary transformer (711) is provided in the installation chamber. The rotor of the rotary transformer (711) rotates synchronously with the motor input shaft (8).

9. The two-stage planetary reduction structure of a ram-horn type transmission housing according to claim 1, characterized in that: A third bearing chamber is provided on the motor mating surface of the cover plate (2), and a fourth bearing chamber is further provided on the inner wall of the end cover (71). Both ends of the motor input shaft (8) are respectively arranged through the third bearing chamber and the fourth bearing chamber. A third wheel hub bearing (20) and a fourth wheel hub bearing (21) adapted to the motor input shaft (8) are respectively provided in the third bearing chamber and the fourth bearing chamber.

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