A two-speed differential reducer assembly

Abstract

A double-speed differential reducer assembly relates to the technical field of reducers, including: a shell, one end of which is provided with a mounting disc, and the other end is provided with a differential, the mounting disc is provided with a first mounting position and a second mounting position, and the second mounting position is located in the first mounting position; and a four-stage reduction structure, which includes a first reduction part, a second reduction part, a third reduction part and a fourth reduction part connected in sequence from the mounting disc to the differential, the power input end of the first reduction part is free to penetrate the mounting disc, the power output end of the fourth reduction part is connected with the power input end of the differential, and the second reduction part and the third reduction part are located below the first reduction part and the fourth reduction part; the first mounting position and the second mounting position improve the applicability of the double-speed differential reducer; the four-stage reduction structure has a larger total transmission ratio, reduces the transmission ratio and load of the single-stage reduction structure, and enables the four-stage reduction structure to be arranged more compactly.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically to a dual-speed differential speed reducer assembly. Background Technology

[0002] A speed reducer is generally used to reduce the speed of an electric motor, internal combustion engine, or other high-speed power source by meshing a gear with fewer teeth on the input shaft with a larger gear on the output shaft. According to the number of transmission stages, speed reducers can be divided into single-stage and multi-stage speed reducers. For multi-stage speed reducers, a shifting mechanism is generally used to adjust the transmission ratio so that the locomotive can output sufficient torque.

[0003] Chinese utility model patent CN209146305U discloses a bridge housing differential reducer assembly, which uses a three-stage reduction structure to make the deceleration process smoother. Although the three-stage reduction structure has improved the overall transmission ratio compared to traditional single-stage or two-stage reducers, the overall transmission ratio of the three-stage reduction structure is still limited. It cannot effectively transfer high-speed input to extremely low-speed and extremely high-torque output. Moreover, in the three-stage reduction structure, each stage needs to bear a large transmission ratio and load, and the large difference in the diameter of the large and small gears in each stage makes the overall structure of the reducer assembly large, which has limitations in terms of space. Furthermore, like most existing reducer assemblies, the above-mentioned reducer assembly can only be assembled with a single motor, which limits its applicability. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dual-speed differential reducer assembly to solve the problems of insufficient transmission ratio, large load on the reduction structure in the reducer assembly, and poor space limitation and applicability in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A dual-speed differential reducer assembly, comprising:

[0007] A housing, with a mounting plate at one end and a differential at the other end, the mounting plate having a first mounting position and a second mounting position, the second mounting position being located within the first mounting position; and

[0008] The four-stage reduction structure includes a first reduction component, a second reduction component, a third reduction component, and a fourth reduction component connected sequentially from the mounting plate towards the differential. The power input end of the first reduction component freely passes through the mounting plate, and the power output end of the fourth reduction component is connected to the power input end of the differential. The second and third reduction components are located below the first and fourth reduction components.

[0009] Compared with the prior art, the present invention has the following advantages: because the mounting plate has a first mounting position and a second mounting position, the dual-speed differential reducer can be adapted to at least two types of motors, improving its applicability; and the dual-speed differential reducer in the present invention has a four-stage reduction structure, which can obtain a larger overall transmission ratio while reducing the transmission ratio and load of the single-stage reduction structure, and reducing the gear volume and diameter difference of the large and small gears in each stage of the reduction structure, so that the four-stage reduction structure can be arranged more compactly in space, reducing the space occupancy rate of the entire dual-speed differential reducer.

[0010] Preferably, the first speed reducer includes an input shaft rotatably mounted in the housing, one end of the input shaft freely passing through the mounting plate, and a first drive gear fixedly sleeved on the input shaft, the first drive gear meshing with the power input end of the second speed reducer.

[0011] Preferably, the second speed reducer includes a first drive shaft rotatably mounted in the housing parallel to the input shaft. A first driven gear and a second driving gear are fixedly sleeved on the first drive shaft. The first driven gear meshes with the first driving gear, and the second driving gear meshes with the power input end of the third speed reducer.

[0012] Preferably, the third reduction component includes a second transmission shaft rotatably mounted in the housing parallel to the first transmission shaft. A second driven gear meshing with the second driving gear is fixedly sleeved on the second transmission shaft. A high-speed transmission component and a low-speed transmission component are provided between the second transmission shaft and the fourth reduction component. A shifting mechanism is provided between the high-speed transmission component, the low-speed transmission component, and the inner and outer sides of the housing. The shifting mechanism is used to change the transmission state of the second transmission shaft to the fourth reduction component.

[0013] Preferably, the fourth reduction component includes a third transmission shaft rotatably mounted in the housing parallel to the first transmission shaft, a third drive gear is fixedly sleeved on the third transmission shaft, the third drive gear meshes with a third driven gear fixedly sleeved on the power input end of the differential, and the high-speed transmission component and the low-speed transmission component are disposed between the second transmission shaft and the third transmission shaft.

[0014] Preferably, the high-speed transmission component includes a high-speed drive gear fixedly mounted on a second transmission shaft and a high-speed driven gear rotatably mounted on a third transmission shaft, wherein the high-speed drive gear meshes with the high-speed driven gear.

[0015] Preferably, the low-speed transmission component includes a low-speed driving gear fixedly sleeved on the second transmission shaft and a low-speed driven gear rotatably sleeved on the third transmission shaft, wherein the low-speed driving gear meshes with the low-speed driven gear.

[0016] Preferably, the shifting mechanism is disposed between the high-speed driven gear and the low-speed driven gear and between the inner and outer sides of the housing.

[0017] Preferably, a cable bracket arranged opposite to the shifting mechanism is fixedly installed on the housing.

[0018] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention.

[0020] Figure 2 for Figure 1 A structural diagram from another angle.

[0021] Figure 3 for Figure 1 A schematic diagram of the internal structure.

[0022] Figure 4 for Figure 3 A structural diagram from another angle.

[0023] The numbers in the diagram are as follows: 1. Housing; 11. Mounting plate; 12. First mounting position; 13. Second mounting position; 2. Differential; 3. Input shaft; 31. First drive gear; 4. First transmission shaft; 41. First driven gear; 42. Second drive gear; 5. Second transmission shaft; 51. Second driven gear; 52. High-speed drive gear; 53. Low-speed drive gear; 6. Third transmission shaft; 61. Third drive gear; 62. High-speed driven gear; 63. Low-speed driven gear; 7. Third driven gear; 8. Shifting mechanism; 9. Cable bracket. Detailed Implementation

[0024] To make the technical means, creative features, achieved objectives and functions of this utility model clearer and easier to understand, the utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] like Figure 1-2As shown, an embodiment of this utility model provides a dual-speed differential reducer assembly, including: a housing 1, one end of which is mounted with a mounting plate 11, and the other end of which is mounted with a differential 2. The mounting plate 11 is provided with a first mounting position 12 and a second mounting position 13, the second mounting position 13 being located within the first mounting position 12, and the mounting profile of the second mounting position 13 being smaller than that of the first mounting position 12; and a four-stage reduction structure, which includes a first reduction component, a second reduction component, a third reduction component, and a fourth reduction component connected sequentially from the mounting plate 11 toward the differential 2. The power input end of the first reduction component freely passes through the mounting plate 11, and the power output end of the fourth reduction component is connected to the power input end of the differential 2. The second and third reduction components are located below the first and fourth reduction components. Preferably, the distance between the first and fourth reduction components is arranged as close as possible, where conditions permit, to arrange the four-stage reduction structure more compactly.

[0026] Because the mounting plate 11 has a reserved first mounting position 12 and a reserved second mounting position 13, the dual-speed differential reducer can be adapted to different types of motors, improving its applicability. Furthermore, the dual-speed differential reducer in this utility model has a four-stage reduction structure, which can obtain a larger overall transmission ratio while reducing the transmission ratio and load of the single-stage reduction structure. It also reduces the gear volume and the diameter difference between the large and small gears in each stage of the reduction structure, allowing the four-stage reduction structure to be arranged more compactly in space, thus reducing the overall space occupancy of the dual-speed differential reducer.

[0027] like Figure 3-4 As shown, according to another embodiment of the present invention, the dual-speed differential reducer assembly further optimizes its first reducer, second reducer, third reducer, and fourth reducer. The first reducer includes an input shaft 3 rotatably mounted in the housing 1. One end of the input shaft 3 freely passes through the mounting plate 11. A first drive gear 31 is fixedly sleeved on the input shaft 3. The first drive gear 31 meshes with the power input end of the second reducer. Preferably, the input shaft 3 is a splined shaft, and the rotation of the input shaft 3 transmits power to the second reducer through the first drive gear 31.

[0028] The second speed reducer includes a first drive shaft 4 rotatably mounted in the housing 1 parallel to the input shaft 3. A first driven gear 41 and a second driving gear 42 are fixedly sleeved on the first drive shaft 4. The first driven gear 41 meshes with the first driving gear 31, and the second driving gear 42 meshes with the power input end of the third speed reducer.

[0029] The third speed reducer includes a second drive shaft 5 rotatably mounted in the housing 1 parallel to the first drive shaft 4. A second driven gear 51 that meshes with the second driving gear 42 is fixedly sleeved on the second drive shaft 5. A high-speed transmission component and a low-speed transmission component are provided between the second drive shaft 5 and the fourth speed reducer. A shifting mechanism 8 is provided between the high-speed transmission component, the low-speed transmission component and the inner and outer sides of the housing 1. The shifting mechanism 8 is used to change the transmission state from the second drive shaft 5 to the fourth speed reducer.

[0030] The fourth reduction component includes a third transmission shaft 6 rotatably mounted in the housing 1 parallel to the first transmission shaft 4. A third drive gear 61 is fixedly sleeved on the third transmission shaft 6. The third drive gear 61 meshes with a third driven gear 7 fixedly sleeved on the power input end of the differential 2. The high-speed transmission component and the low-speed transmission component are arranged between the second transmission shaft 5 and the third transmission shaft 6.

[0031] Preferably, the high-speed transmission component includes a high-speed drive gear 52 fixedly mounted on the second transmission shaft 5 and a high-speed driven gear 62 rotatably mounted on the third transmission shaft 6, wherein the high-speed drive gear 52 meshes with the high-speed driven gear 62; the low-speed transmission component includes a low-speed drive gear 53 fixedly mounted on the second transmission shaft 5 and a low-speed driven gear 63 rotatably mounted on the third transmission shaft 6, wherein the low-speed drive gear 53 meshes with the low-speed driven gear 63; and the shifting mechanism 8 is disposed between the high-speed driven gear 62 and the low-speed driven gear 63 and between the inner and outer sides of the housing 1; the shifting mechanism 8 switches between the high-speed driven gear 62 and the low-speed driven gear 63, thereby changing the final power output state of the differential 2.

[0032] The specific structure of the shift mechanism 8 and the principle of how the shift mechanism 8 switches between the high-speed driven gear 62 and the low-speed driven gear 63 have been disclosed in Chinese utility model patent with authorization announcement number CN209146305U, and will not be described in detail here. At the same time, the specific structure and operating principle of the differential 2 have also been disclosed in the above patent, and are also considered prior art.

[0033] like Figure 1-2 As shown, according to another embodiment of the present invention, in a preferred embodiment of the dual-speed differential reducer assembly, a cable bracket 9 is fixedly installed on the housing 1 and arranged opposite to the shifting mechanism 8; so as to support the cable used to connect to the shifting mechanism 8.

[0034] The working principle of this utility model is as follows: When this utility model is in use, power is input from the input shaft 3, which drives the input shaft 3 to rotate and the first driving gear 31 to rotate. Through the transmission between the first driving gear 31 and the first driven gear 41, the first transmission shaft 4 is driven to rotate. Then, through the transmission between the second driving gear 42 and the second driven gear 51, the second transmission shaft 5 is driven to rotate. If the shift mechanism 8 is operated to switch to the high-speed driven gear 62, the third transmission shaft 6 is driven to rotate through the transmission between the high-speed driving gear 52 and the high-speed driven gear 62. Finally, through the transmission between the third driving gear 61 and the third driven gear 7, the differential 2 is driven to output high speed and low torque. If the shift mechanism 8 is operated to select the low-speed driven gear... 63, through the transmission of the low-speed driving gear 53 and the low-speed driven gear 63, drives the third transmission shaft 6 to rotate, thereby driving the differential 2 to output high torque at low speed; moreover, since the first mounting position 12 and the second mounting position 13 are reserved on the mounting plate 11, the dual-speed differential reducer of this utility model can be adapted to different types of motors, improving its applicability; and the dual-speed differential reducer of this utility model has a four-stage reduction structure, which can obtain a larger overall transmission ratio, while reducing the transmission ratio and load of the single-stage reduction structure, reducing the gear volume and diameter difference in each stage of the reduction structure, so that the four-stage reduction structure can be arranged more compactly in space, reducing the space occupancy rate of the entire dual-speed differential reducer.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dual-speed differential reducer assembly, characterized in that, include: A housing (1) has a mounting plate (11) installed at one end and a differential (2) installed at the other end. The mounting plate (11) has a first mounting position (12) and a second mounting position (13), with the second mounting position (13) located within the first mounting position (12). The four-stage reduction structure includes a first reduction component, a second reduction component, a third reduction component, and a fourth reduction component connected sequentially from the mounting plate (11) toward the differential (2). The power input end of the first reduction component freely passes through the mounting plate (11), and the power output end of the fourth reduction component is connected to the power input end of the differential (2). The second and third reduction components are located below the first and fourth reduction components.

2. The dual-speed differential reducer assembly according to claim 1, characterized in that, The first speed reducer includes an input shaft (3) rotatably mounted in the housing (1), one end of the input shaft (3) freely passing through the mounting plate (11), and a first drive gear (31) fixedly sleeved on the input shaft (3), the first drive gear (31) meshing with the power input end of the second speed reducer.

3. The dual-speed differential reducer assembly according to claim 2, characterized in that, The second speed reducer includes a first drive shaft (4) that is rotatably mounted in the housing (1) parallel to the input shaft (3). A first driven gear (41) and a second driving gear (42) are fixedly sleeved on the first drive shaft (4). The first driven gear (41) meshes with the first driving gear (31), and the second driving gear (42) meshes with the power input end of the third speed reducer.

4. The dual-speed differential reducer assembly according to claim 3, characterized in that, The third speed reducer includes a second drive shaft (5) that is rotatably mounted in the housing (1) parallel to the first drive shaft (4). A second driven gear (51) that meshes with the second driving gear (42) is fixedly sleeved on the second drive shaft (5). A high-speed transmission component and a low-speed transmission component are provided between the second drive shaft (5) and the fourth speed reducer. A shifting mechanism (8) is provided between the high-speed transmission component, the low-speed transmission component and the inner and outer sides of the housing (1). The shifting mechanism (8) is used to change the transmission state of the second drive shaft (5) to the fourth speed reducer.

5. A dual-speed differential reducer assembly according to claim 4, characterized in that, The fourth reduction component includes a third transmission shaft (6) that is rotatably mounted in the housing (1) parallel to the first transmission shaft (4). A third drive gear (61) is fixedly sleeved on the third transmission shaft (6). The third drive gear (61) meshes with a third driven gear (7) fixedly sleeved on the power input end of the differential (2). The high-speed transmission component and the low-speed transmission component are arranged between the second transmission shaft (5) and the third transmission shaft (6).

6. A dual-speed differential reducer assembly according to claim 5, characterized in that, The high-speed transmission component includes a high-speed drive gear (52) fixedly mounted on the second transmission shaft (5) and a high-speed driven gear (62) rotatably mounted on the third transmission shaft (6), wherein the high-speed drive gear (52) meshes with the high-speed driven gear (62).

7. A dual-speed differential reducer assembly according to claim 6, characterized in that, The low-speed transmission component includes a low-speed driving gear (53) fixedly sleeved on the second transmission shaft (5) and a low-speed driven gear (63) rotatably sleeved on the third transmission shaft (6), wherein the low-speed driving gear (53) meshes with the low-speed driven gear (63).

8. A dual-speed differential reducer assembly according to claim 7, characterized in that, The shifting mechanism (8) is located between the high-speed driven gear (62) and the low-speed driven gear (63) and between the inner and outer sides of the housing (1).

9. A dual-speed differential reducer assembly according to claim 4, characterized in that, A cable bracket (9) is fixedly installed on the housing (1) and arranged opposite to the shifting mechanism (8).

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