Differential mechanism with sound insulation device

Abstract

The utility model discloses a differential mechanism with a sound insulation device. The differential mechanism comprises a differential mechanism body and the sound insulation device. The sound insulation device comprises an inner shell and an outer shell; the inner shell is arranged on the outer side of the differential mechanism body in a sleeving mode. The outer shell is arranged on the outer side of the inner shell; a sound insulation cavity is formed between the outer shell and the inner shell. When the noise generated by the sound insulation box reaches the external environment, the sound is smaller than that of a box body without a sound insulation cavity, and the operation experience of a user is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric vehicle differentials, and particularly relates to a differential with a sound insulation device. Background Art

[0002] There are differentials on medical electric scooters currently on the market. The noise generated by their transmission structure is directly transmitted to the external environment through the solid box, which generates a lot of noise and reduces riding comfort. Utility Model Content

[0003] The utility model provides a differential with a sound insulation device to solve the above technical problems.

[0004] The solutions adopted by the present invention to achieve its technical effects are:

[0005] A differential with a sound insulation device comprises a differential body and a sound insulation device; the sound insulation device comprises an inner shell and an outer shell; the inner shell is sleeved on the outside of the differential body; the outer shell is arranged on the outside of the inner shell; a sound insulation cavity is formed between the outer shell and the inner shell.

[0006] Preferably, the differential body includes a motor, a differential gear set and an output shaft; the differential gear set is transmission-connected to the driving end of the motor; the output shaft is transmission-connected to the differential gear set; the inner shell is arranged on the outside of the output end of the motor, the differential gear set and the transmission part of the output shaft.

[0007] Preferably, the sound insulation cavity includes a gear sound insulation cavity; the gear sound insulation cavity is located outside the transmission part of the differential gear set and the output shaft; the sound insulation device also includes a gear sound insulation plug; the gear sound insulation plug is inserted into the gear sound insulation cavity, and the gear sound insulation plug is installed on the top of the inner shell and the outer shell by bolts.

[0008] Preferably, a gear cover is mounted on the top of the gear sound insulation plug by screws; and the gear cover is arranged on the top of the differential gear set.

[0009] Preferably, a rubber gasket is provided between the gear cover and the gear sound insulation plug.

[0010] Preferably, the sound insulation cavity includes a bearing cover sound insulation cavity; the bearing cover sound insulation cavity is located on the outside of the bearing where the transmission connection part between the output end of the motor and the differential gear set is located; the sound insulation device also includes a bearing cover sound insulation plug; the bearing cover sound insulation plug is inserted into the bearing cover sound insulation cavity, and the bearing cover sound insulation plug is installed on one side of the inner shell and the outer shell by bolts.

[0011] Preferably, a bearing cover is provided on one side of the bearing cover sound insulation plug.

[0012] Preferably, the sound insulation cavity includes a motor sound insulation cavity; the motor sound insulation cavity is located outside the transmission connection part between the output end of the motor and the differential gear set; the sound insulation device further includes a motor sound insulation plug; the motor sound insulation plug is inserted into the motor sound insulation cavity, and the motor sound insulation plug is installed on one side of the inner shell and the outer shell by bolts.

[0013] Preferably, the motor is installed at one end of the motor sound insulation plug by bolts.

[0014] The beneficial effects of the present utility model are as follows: A sound insulation cavity is provided, and the sound insulation cavity will absorb the noise generated by the mechanical transmission inside the differential. The sound insulation cavity is divided into a motor sound insulation cavity, a bearing cover sound insulation cavity and a gear sound insulation cavity, and a motor sound insulation plug, a bearing cover sound insulation plug and a gear sound insulation plug are respectively installed. The motor sound insulation cavity and the motor sound insulation plug are used to absorb the noise generated at the connection between the motor and the differential gear set, the bearing cover sound insulation cavity and the bearing cover sound insulation plug are used to absorb the noise generated by the high-speed rotation of the bearing, and the gear sound insulation cavity and the gear sound insulation plug are used to absorb the noise generated during the operation of the differential gear set. When the noise generated by the present utility model reaches the external environment, it will be smaller than the sound of the box without a sound insulation cavity, improving the user experience of the operator. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall differential with a sound insulation device disclosed in the embodiment of the present utility model;

[0016] Figure 2 It is an exploded view of the differential with a sound insulation device disclosed in the embodiment of the present utility model;

[0017] Figure 3 It is a sectional view of the differential (without the motor) with a sound insulation device disclosed in the embodiment of the present utility model.

[0018] Identification description: 1 - inner shell, 2 - outer shell, 3 - sound insulation cavity, 4 - motor, 5 - differential gear set, 6 - output shaft, 7 - gear sound insulation plug, 8 - gear cover, 9 - rubber gasket, 10 - bearing sound insulation plug, 11 - bearing cover, 12 - motor sound insulation plug. Detailed Embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as being "fixedly connected to" another element, common fixed connection methods such as welding, bolt connection or glue connection can be used.

[0020] Please refer to Figures 1-3 , in a preferred embodiment of the present utility model, a differential with a sound insulation device is disclosed, which includes a differential body and a sound insulation device; the sound insulation device includes an inner shell 1 and an outer shell 2; the inner shell 1 is sleeved on the outer side of the differential body; the outer shell 2 is disposed on the outer side of the inner shell 1; a sound insulation cavity 3 is formed between the outer shell 2 and the inner shell 1.

[0021] Specifically, the differential body includes a motor 4, a differential gear set 5 and an output shaft 6; the differential gear set 5 is in transmission connection with the driving end of the motor 4; the output shaft 6 is in transmission connection with the differential gear set 5; the inner shell 1 is sleeved on the outer sides of the output end of the motor 4, the differential gear set 5 and the transmission part of the output shaft 6.

[0022] Specifically, the sound insulation cavity 3 includes a gear sound insulation cavity; the gear sound insulation cavity is located on the outer sides of the differential gear set 5 and the transmission part of the output shaft 6; the sound insulation device further includes a gear sound insulation plug 7; the gear sound insulation plug 7 is inserted into the gear sound insulation cavity, and the gear sound insulation plug 7 is installed on the tops of the inner shell 1 and the outer shell 2 by bolts. The gear sound insulation cavity and the gear sound insulation plug 7 can effectively reduce the noise generated during the operation of the differential gear set 5 and the output shaft 6.

[0023] Specifically, a gear cover 8 is installed on the top of the gear sound insulation plug 7 by screws; the gear cover 8 covers the top of the differential gear set 5. The gear cover 8 is used for protecting and sealing the differential gear set 5.

[0024] Specifically, a rubber gasket 9 is provided between the gear cover 8 and the gear sound insulation plug 7, which serves as an oil seal for the differential gear set 5.

[0025] Specifically, the sound insulation cavity 3 includes a bearing cover sound insulation cavity; the bearing cover sound insulation cavity is located outside the bearing at the transmission connection part between the output end of the motor 4 and the differential gear set 5; the sound insulation device further includes a bearing cover sound insulation plug 10; the bearing cover sound insulation plug 10 is inserted into the bearing cover sound insulation cavity, and the bearing cover sound insulation plug 10 is installed on one side of the inner shell 1 and the outer shell 2 through bolts. The bearing cover sound insulation cavity and the bearing cover sound insulation plug 10 are used to absorb the noise generated by the high-speed rotation of the bearing.

[0026] Specifically, a bearing cover 11 is provided on one side of the bearing cover sound insulation plug 10 for sealing and protecting the bearing. Particularly, the bearing part is not shown in the present utility model, and it is a common and general bearing assembly in the prior art.

[0027] Specifically, the sound insulation cavity 3 includes a motor sound insulation cavity; the motor sound insulation cavity is located outside the transmission connection part between the output end of the motor 4 and the differential gear set 5; the sound insulation device further includes a motor sound insulation plug 12; the motor sound insulation plug 12 is inserted into the motor sound insulation cavity, and the motor sound insulation plug 12 is installed on one side of the inner shell 1 and the outer shell 2 through bolts. The motor sound insulation cavity and the motor sound insulation plug 12 are used to absorb the noise generated at the connection between the motor 4 and the differential gear set 5.

[0028] Specifically, the motor 4 is installed on one end of the motor sound insulation plug 12 through bolts.

[0029] From the above description, it can be seen that the present utility model can effectively reduce the generated noise and improve the use experience of the operator.

[0030] The preferred embodiments of the present utility model have been described in detail above in conjunction with the specification drawings. It should be noted that the protection scope of the present utility model includes but is not limited to the above embodiments; the specific structures disclosed in the specification drawings are also only the preferred embodiments of the present utility model. Those skilled in the art can also develop other embodiments based on this. Any simple deformation or equivalent replacement that does not deviate from the innovative concept of the present utility model is covered by the present utility model and belongs to the protection scope of the present utility model.

Claims

1. A differential with a sound insulation device, characterized in that, include: Differential body; sound insulation; The sound insulation device includes an inner shell and an outer shell; the inner shell is sleeved on the outside of the differential body; the outer shell is arranged on the outside of the inner shell; and a sound insulation cavity is formed between the outer shell and the inner shell.

2. The differential with a sound insulation device according to claim 1, characterized in that: The differential body includes a motor, a differential gear set and an output shaft; the differential gear set is transmission-connected to the driving end of the motor; the output shaft is transmission-connected to the differential gear set; the inner shell is sleeved on the outside of the output end of the motor, the differential gear set and the transmission part of the output shaft.

3. The differential with a sound insulation device according to claim 2, wherein: The sound insulation cavity includes a gear sound insulation cavity; the gear sound insulation cavity is located outside the transmission part of the differential gear set and the output shaft; the sound insulation device also includes a gear sound insulation plug; the gear sound insulation plug is inserted into the gear sound insulation cavity, and the gear sound insulation plug is installed on the top of the inner shell and the outer shell by bolts.

4. The differential with a sound insulation device according to claim 3, characterized in that: A gear cover is installed on the top of the gear sound insulation plug through screws; the gear cover is arranged on the top of the differential gear set.

5. The differential with a sound insulation device according to claim 4, characterized in that: A rubber gasket is provided between the gear cover and the gear sound insulation plug.

6. The differential with a sound insulation device according to claim 2, characterized in that: The sound insulation cavity includes a bearing cover sound insulation cavity; the bearing cover sound insulation cavity is located on the outside of the bearing at the transmission connection part between the output end of the motor and the differential gear set; the sound insulation device also includes a bearing cover sound insulation plug; the bearing cover sound insulation plug is inserted into the bearing cover sound insulation cavity, and the bearing cover sound insulation plug is installed on one side of the inner shell and the outer shell by bolts.

7. The differential with a sound insulation device according to claim 6, characterized in that: A bearing cover is provided on one side of the bearing cover sound insulation plug.

8. The differential with a sound insulation device according to claim 2, characterized in that: The sound insulation cavity includes a motor sound insulation cavity; the motor sound insulation cavity is located outside the transmission connection part between the output end of the motor and the differential gear set; the sound insulation device also includes a motor sound insulation plug; the motor sound insulation plug is inserted into the motor sound insulation cavity, and the motor sound insulation plug is installed on one side of the inner shell and the outer shell by bolts.

9. The differential with a sound insulation device according to claim 8, characterized in that: The motor is mounted on one end of the motor sound insulation plug by means of bolts.

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