Two-stage planetary speed reduction type claw-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 type cleat-shaped transmission box body which comprises a cleat-shaped transmission box body. A containing cavity is formed between the cavel-shaped transmission box body and the cover plate, and the upper end of the cover plate is connected with a cavel-shaped structural body; 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 type ram-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 rear-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 ram-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 type ram-horn type transmission box, comprising:

[0006] Claw-shaped transmission housing;

[0007] A cover plate, a accommodating chamber is formed between the ram-horn-shaped transmission box body and the cover plate, and a ram-horn-shaped structure is connected to the upper end of 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] The motor housing, the cover plate is provided with a motor mating surface on one side opposite to the motor housing, the front end of the motor housing is connected to the motor mating surface, and the rear end is connected to an end cover;

[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 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.

[0020] Furthermore, at least four first planetary gears and four second planetary gears are respectively provided, and are equidistantly distributed in the circumferential direction.

[0021] Furthermore, the second planet carrier and the reduction gear output shaft are integrally formed and coaxial.

[0022] 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.

[0023] Further, a brake disc is mounted on the flange shaft head;

[0024] Brake caliper, installed on the horn-shaped transmission housing, used to brake the brake disc;

[0025] Among them, a mounting hole matching with the brake caliper is provided through the upper end of the ram-horn-shaped transmission box body.

[0026] Furthermore, an installation chamber is provided on the inner wall of the end cover, and a rotary transformer is provided in the installation chamber, and the rotor of the rotary transformer rotates synchronously with the input shaft of the motor.

[0027] Furthermore, a third bearing chamber is provided on the motor mating surface of the cover plate, and a fourth bearing chamber is 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. The third bearing chamber and the fourth bearing chamber are respectively provided with a third hub bearing and a fourth hub bearing that are adapted to the motor input shaft.

[0028] The beneficial effects of the utility model are:

[0029] Compared with the primary planetary transmission structure, the secondary planetary transmission structure constructed in the present application, through the coordinated transmission of two sets of planetary components, enables the overall transmission of the ram's horn transmission box to achieve a higher reduction ratio, achieve a greater torque output, and be able to disperse the load to increase the load capacity, thereby further improving the durability and stability of the overall transmission structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 This is a side view of the ram's horn type transmission box body of the utility model. Figure 1 ;

[0032] Figure 2 This is a side view of the ram's horn type transmission box body of the utility model. Figure 2 ;

[0033] Figure 3 This is a front cross-sectional view of a ram-horn type transmission box according to a specific implementation method of the utility model;

[0034] Figure 4 This is a side view of the ram's horn type transmission box body of the utility model. Figure 3 ;

[0035] Figure 5 This is a side view of the ram's horn type transmission box body of the utility model. Figure 4 . DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figures 1 to 5 As shown, the utility model discloses a two-stage planetary reduction type ram-horn type transmission box, a two-stage planetary reduction type ram-horn type transmission box, comprising:

[0038] Claw-shaped transmission housing 1;

[0039] A accommodating chamber is formed between the cover plate 2, and a ram-horn-shaped transmission box 1 and the cover plate 2, and a ram-horn-shaped structure is connected to the upper end of the cover plate 22;

[0040] Bearing position 3: The front end of the horn-shaped transmission housing 1 is provided with a bearing position 3 which is communicated with the accommodating chamber and has a through hole;

[0041] A first wheel hub bearing 4, the first wheel hub bearing 4 is installed in the bearing position 3;

[0042] A flange shaft head 5, wherein the 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;

[0043] The reduction gear output shaft 6, one end of which passes through the connecting shaft hole and is sleeved with the flange shaft head 5;

[0044] The motor housing 7, the cover plate 2 is provided with a motor mating surface on one side 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;

[0045] The motor input shaft 8 is located in the motor housing 7, and the 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;

[0046] The first planetary assembly includes a first planet 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, and the first planetary gears 12 mesh with the first sun gear 9 on the side away from the first gear ring 11;

[0047] One end of the first planet carrier 10 is rotatably connected to a first rotating shaft 13 matched with the first planet gear 12, for providing radial support to the first planet gear 12; a second rotating shaft 14 is connected and fixed to the middle of the first planet carrier 10, and one end of the second rotating shaft 14 is connected and fixed to a second sun gear 15;

[0048] The second planetary assembly includes a second planet carrier 16 located in the accommodating chamber, a second gear ring 17 fixedly mounted on the inner wall of the horn-shaped transmission housing 1, and a plurality of second planetary gears 18 meshed with the inner wall of the second gear ring 17. The second planetary gears 18 mesh with the second sun gear 15 on the side away from the second gear ring 17.

[0049] One end of the second planet carrier 16 is rotatably connected to a third rotating shaft 19 that cooperates with the second planet gear 18 and is used to provide radial support for the second planet gear 18;

[0050] One end of the second planet carrier 16 is fixedly connected to the reduction gear output shaft 6 , and the other end is rotatably connected to the second rotating shaft 14 .

[0051] In this solution, the flange shaft head includes a sleeve portion and a disc body portion that are integrally connected, and the disc body portion is used to be connected and fixed to the wheel hub.

[0052] In this solution, the ram-horn-shaped structure and the cover plate 2 are integrally formed.

[0053] In this solution, two sides of the cover plate 2 are respectively connected and fixed to the ram-horn type transmission housing and the motor housing 7 by screws.

[0054] In this solution, a protrusion is provided on the side of the second planetary carrier facing the second rotating shaft, a mounting hole matching with the protrusion is opened at the end of the second rotating shaft, and a fifth hub bearing is arranged between the protrusion and the mounting hole.

[0055] In this scheme, the horn-shaped structure Figure 1 In addition to the results, Figure 4 and Figure 5 The structure shown.

[0056] By adopting the above technical solution, compared with the primary planetary transmission structure, the secondary planetary transmission structure constructed in the present application, through the coordinated transmission of two sets of planetary components, enables the overall transmission of the ram's horn transmission box to achieve a higher reduction ratio, achieve a greater torque output, and be able to disperse the load to increase the load capacity, thereby further improving the durability and stability of the overall transmission structure;

[0057] The ram-horn type structure is a ram-horn structure that can withstand external forces more effectively, thereby improving the stability and durability of the structure. The ram-horn type structure is used as a connecting structure for connecting a drive device to a car frame. Specifically, the ram-horn type structure is connected and fixed to the chassis part of the car's outer frame and can be applied to the rear wheels of the car.

[0058] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0059] Furthermore, the motor input shaft 8 is hollow, and one end of the second rotating shaft 14 extends axially through the hollow part of the motor input shaft 8 to the end cover 71. The end cover 71 is provided with a second bearing chamber that matches the second rotating shaft 14, and the second bearing chamber is provided with a second hub bearing that is adapted to the second rotating shaft 14.

[0060] By adopting the above technical solution, the load can be dispersed to the end cover, so that the load capacity of the two sets of planetary assemblies is further improved.

[0061] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0062] Furthermore, at least four first planetary gears 12 and at least four second planetary gears 18 are respectively provided, and are equidistantly distributed in the circumferential direction.

[0063] By adopting the above technical solution, the load on each planetary gear is made more uniform, thereby improving the stability and load-bearing capacity of the entire system.

[0064] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0065] Furthermore, the second planet carrier 16 and the reduction gear output shaft 6 are integrally formed and coaxial.

[0066] By adopting the above technical solution, the stability and load capacity of power transmission are further improved.

[0067] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0068] Furthermore, the front end of the first hub bearing 4 abuts against the bearing position 3 , and the side of the second planet carrier 16 facing the front end of the horn-shaped transmission housing 1 abuts against the rear end of the first hub bearing 4 .

[0069] By adopting the above technical solution, the first hub bearing can be axially abutted and pressed against the bearing position, which effectively improves the firmness of the first hub bearing and further improves the stability of the power output of the ram's horn type transmission box.

[0070] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0071] Furthermore, it also includes:

[0072] The brake disc 20 is mounted on the flange shaft head 5;

[0073] The brake caliper 21 is mounted on the horn-shaped transmission housing 1 and is used to brake the brake disc 20;

[0074] A mounting hole matching with the brake caliper 21 is formed through the upper end of the ram-horn transmission housing 1 .

[0075] By adopting the above technical solution, the wheel hub can achieve stable and reliable braking while improving space utilization.

[0076] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0077] Furthermore, an installation chamber is 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 .

[0078] By adopting the above technical solution, accurate speed feedback is provided for the power system of the vehicle.

[0079] This embodiment provides a two-stage planetary reduction ram-horn type transmission box, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features.

[0080] 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. The third bearing chamber and the fourth bearing chamber are respectively provided with a third hub bearing 22 and a fourth hub bearing 23 adapted to the motor input shaft 8.

[0081] By adopting the above technical solution, the power output of the transmission box is smooth, stable and reliable.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A two-stage planetary reduction ram-horn type transmission housing, characterized in that: include: Claw-shaped transmission housing (1); A cover plate (2), a ram-horn-shaped transmission housing (1) and the cover plate (2) form a containing chamber, and the upper end of the cover plate (2) is connected to a ram-horn-shaped structure; 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); A motor housing (7), a motor mating surface being provided on a side of the cover plate (2) opposite to the motor housing (7), a front end of the motor housing (7) being connected to the motor mating surface, and a rear end being 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 (14) is connected and fixed to the middle of the first planet carrier (10); and one end of the second rotating shaft (14) is connected and fixed to a second sun gear (15); The second planetary assembly comprises a second planetary carrier (16) located in the accommodating chamber, a second gear ring (17) fixedly mounted on the inner wall of the horn-shaped transmission housing (1), and a plurality of second planetary gears (18) meshed with the inner wall of the second gear ring (17), wherein the second planetary gears (18) mesh with the second sun gear (15) on a side facing away from the second gear ring (17); One end of the second planet carrier (16) is rotatably connected to a third rotating shaft (19) that cooperates with the second planet gear (18) and is used to provide radial support for the second planet gear (18); One end of the second planet carrier (16) is fixedly connected to the reduction gear output shaft (6), and the other end is rotationally connected to the second rotating shaft (14).

2. A two-stage planetary reduction clevis-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 (14) 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 (14), and a second hub bearing adapted for the second rotating shaft (14) is provided in the second bearing chamber.

3. A two-stage planetary reduction clevis-type transmission housing according to claim 1, characterized in that: At least four first planetary gears (12) and four second planetary gears (18) are provided respectively, and are equidistantly distributed in the circumferential direction.

4. A two-stage planetary reduction clevis-type transmission housing according to claim 1, characterized in that: The second planet carrier (16) and the reduction gear output shaft (6) are integrally formed and coaxial.

5. A two-stage planetary reduction clevis-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 (16) facing the front end of the ram-horn type transmission housing (1) abuts against the rear end of the first wheel hub bearing (4).

6. A two-stage planetary reduction clevis-type transmission housing according to claim 1, characterized in that: Also includes: A brake disc (20) is mounted on the flange shaft head (5); A brake caliper (21) is mounted on the horn-shaped transmission housing (1) and is used to brake the brake disc (20); A mounting hole matching the brake caliper (21) is provided through the upper end of the ram-horn-shaped transmission housing (1).

7. A two-stage planetary reduction clevis-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).

8. A two-stage planetary reduction clevis-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 (22) and a fourth wheel hub bearing (23) adapted to the motor input shaft (8) are respectively provided in the third bearing chamber and the fourth bearing chamber.

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