Gearbox body of electric tricycle

Abstract

The utility model relates to a gearbox body of an electro-tricycle, which comprises a transmission gear box and a transmission box, the transmission gear box is provided with an assembly chamber, and the assembly chamber is used for installing a change gear set; a heat dissipation device is arranged at one end of the top surface of the speed transmission gear box; a motor mounting area is arranged on the bottom surface of the speed transmission gear box opposite to the heat dissipation device; the motor installation area is provided with a sound insulation and noise reduction device. According to the gearbox body, the cooling fins and the partition plates are arranged, and heat generated in the operation process of a motor can be rapidly dissipated to the surrounding environment through the bearings and the cooling fins. And by arranging the universal motor mounting hole columns, a four-hole motor and a five-hole motor can be adaptively mounted, and the adaptability of the gearbox body is improved. The sound insulation and noise reduction device is arranged in the motor installation area, and a good sound insulation and noise reduction effect can be achieved. The transmission box and the transmission gear box are integrally formed, so that the accumulated error of transmission assembly can be reduced, the gear concentricity is kept, and the operation precision of the transmission is ensured.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle gearbox technology, and in particular to a gearbox housing for an electric tricycle. Background Technology

[0002] The gearbox of an electric tricycle is an important component of the electric tricycle's transmission system. Its main function is to adjust the torque and speed transmitted from the motor or engine to the drive wheels by changing the transmission ratio, thereby changing the vehicle speed and meeting the traction requirements of different driving conditions.

[0003] An electric tricycle gearbox typically includes components such as a housing, input shaft, output shaft, and shift fork shaft. The housing contains gears of different diameters, and the transmission ratio is changed through the meshing of these gears. For example, it may include low-speed, medium-speed, and high-speed gears, along with matching pinions, intermediate gears, and large gears.

[0004] Electric tricycle gearboxes are easy to operate, compact in structure, and highly efficient in transmission. However, the gearbox housings commonly used today consist of multiple interconnected structures, such as two opposing housings. Furthermore, these individual components are typically connected and fixed using bolts, clips, or other methods. Due to unavoidable dimensional errors in the parts, and the allowable fluctuations in component dimensions within specified ranges, cumulative assembly errors occur during gearbox assembly. This leads to misalignment of internal gears, poor meshing, and ultimately, gear wear.

[0005] Moreover, modern gearboxes and motors are generally assembled by fitting them together, which prevents the heat generated by the motor when it runs at high speed from being dissipated in a timely manner, and also generates a lot of noise during operation. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a gearbox housing for an electric tricycle, specifically including the following technical solutions.

[0007] An electric tricycle gearbox housing includes a transmission gearbox and a transmission gearbox. The transmission gearbox has an assembly chamber for mounting a transmission gear set. A heat dissipation device is provided at one end of the top surface of the transmission gearbox. A motor mounting area is provided on the bottom surface of the transmission gearbox opposite to the heat dissipation device. A sound insulation and noise reduction device is provided in the motor mounting area.

[0008] Furthermore, the heat dissipation device includes heat sinks, which are arranged at equal intervals at one end of the transmission gearbox, and adjacent heat sinks form a heat dissipation cavity.

[0009] Furthermore, the heat dissipation device also includes a partition that divides the heat dissipation cavity into a first heat dissipation cavity and a second heat dissipation cavity.

[0010] Furthermore, the motor mounting area is provided with universal motor mounting holes; the universal motor mounting holes include a set of five-hole motor mounting holes and a set of four-hole motor mounting holes; the five-hole motor mounting holes and the four-hole motor mounting holes share two bottom holes.

[0011] Furthermore, the top and bottom surfaces of the transmission gearbox are symmetrically provided with mounting holes, and bearings are fixedly embedded in the mounting holes; the mounting holes include a first mounting hole, a second mounting hole, and a third mounting hole, with the first and second mounting holes located in the motor mounting area; the bearings include a first bearing, a second bearing, and a third bearing, and the transmission gear set includes a drive gear, a double gear, and a shift combination gear; the first mounting hole contains a first bearing for mounting the drive gear, the second mounting hole contains a second bearing for mounting the double gear, and the third mounting hole contains a third bearing for mounting the shift combination gear; the first mounting shaft is fixedly connected to the motor; the drive gear meshes with the double gear, and the double gear meshes with the shift combination gear.

[0012] Furthermore, the sound insulation and noise reduction device includes a reinforcing rib and a noise reduction chamber; the reinforcing rib connects to the motor mounting hole post, and / or connects the motor mounting hole post to the outer wall of the first mounting hole, and / or connects the motor mounting hole post to the outer wall of the second mounting hole; the reinforcing rib, the motor mounting hole post, the first mounting hole, the second mounting hole, and the bottom surface of the transmission gearbox constitute the noise reduction chamber.

[0013] Furthermore, the transmission housing includes a base, an upper mounting platform, and a lower mounting platform; the base is fixedly connected to the end face of the transmission gearbox; the lower mounting platform is disposed on the base and includes a first lower mounting platform and a second lower mounting platform; the first lower mounting platform and the second lower mounting platform are respectively provided with mounting grooves, the mounting grooves are set as semicircles, opposite each other and coaxially arranged; the upper mounting platform and the lower mounting platform are fixedly connected by bolts.

[0014] Furthermore, the transmission housing and the speed transmission gearbox are integrally formed.

[0015] Based on the above technical solution, this utility model has the following beneficial effects.

[0016] 1. The gearbox housing described in this utility model has heat sinks and partitions on the top surface of the transmission gearbox. Multiple heat sinks are arranged at equal intervals at one end of the transmission gearbox, forming multiple heat dissipation chambers. The partitions divide the heat dissipation chambers into a first heat dissipation chamber and a second heat dissipation chamber. The heat sinks are located on the top surface of the transmission gearbox, and a motor is installed on the bottom surface of the transmission gearbox opposite to this location. Therefore, the heat generated during motor operation can be quickly dissipated to the surrounding environment through the bearings and heat sinks. The first and second heat dissipation chambers, divided by the partitions, further accelerate the heat transfer process. In addition to heat dissipation and conduction, the partitions also reinforce the heat sinks, increasing the mechanical strength of their location.

[0017] 2. The gearbox housing described in this utility model is provided with universal motor mounting posts, which include a set of five-hole motor mounting posts and a set of four-hole motor mounting posts, wherein the five-hole motor mounting posts and the four-hole motor mounting posts share two bottom posts. By providing universal motor mounting posts, it is possible to accommodate both four-hole and five-hole motors, thereby increasing the adaptability of the gearbox housing.

[0018] 3. The gearbox housing described in this utility model includes a sound insulation and noise reduction device in the motor mounting area. This device comprises multiple noise reduction chambers of different shapes and depths, achieving superior sound insulation and noise reduction effects. The noise reduction chambers are composed of reinforcing ribs, motor mounting posts, a first mounting hole, a second mounting hole, and the bottom surface of the transmission gearbox. Therefore, they can withstand the strong impacts generated during motor operation, ensuring the mechanical strength of the motor operating area and maintaining the safe and stable operation of the motor.

[0019] 4. The gearbox housing described in this utility model is integrally formed with the transmission gearbox, i.e., it is set as an integrated gearbox housing. This can reduce the cumulative assembly error caused by splicing multiple parts during the assembly of the gearbox, and at the same time, it can maintain the concentricity between the gears during the operation of the gearbox, ensure the operating accuracy of the gearbox, and extend the service life of the gearbox. Attached Figure Description

[0020] Figure 1 : Schematic diagram of the overall structure of the gearbox housing in the exemplary embodiment (1);

[0021] Figure 2 : Schematic diagram of the overall structure of the gearbox housing in the exemplary embodiment (2);

[0022] Figure 3 Schematic diagram of the five-hole motor mounting post structure in an exemplary embodiment;

[0023] Figure 4 Schematic diagram of the four-hole motor mounting post structure in an exemplary embodiment;

[0024] Figure 5 Schematic diagram of the reinforcing rib structure in an exemplary embodiment;

[0025] Figure 6 Schematic diagram of the noise reduction chamber structure in an exemplary embodiment;

[0026] Figure 7 Schematic diagram of the variable speed gear set structure in an exemplary embodiment;

[0027] Figure 8 : Schematic diagram of the assembly structure of the gearbox housing and the transmission gear set in the exemplary embodiment (1);

[0028] Figure 9 : Schematic diagram of the assembly structure of the gearbox housing and the gear set in the exemplary embodiment (2).

[0029] Symbol Explanation

[0030] 1-Speed ​​transmission gearbox, 101-First mounting hole, 102-Second mounting hole, 103-Third mounting hole, 104-First mounting shaft, 105-Second mounting shaft, 106-Third mounting shaft, 107-First bearing, 108-Second bearing, 109-Third bearing;

[0031] 201 - Five-hole motor mounting post; 202 - Four-hole motor mounting post;

[0032] 3-Gearbox, 301-Base, 302-Upper mounting platform, 303-Lower mounting platform, 304-Mounting slot;

[0033] 401-Drive gear, 402-Double gear, 403-Shift combination gear, 404-Differential gear;

[0034] 501 - Heat sink, 502 - Partition, 503 - First heat dissipation cavity, 504 - Second heat dissipation cavity;

[0035] 601 - Reinforcing rib, 602 - Noise reduction chamber. Detailed Implementation

[0036] It should be noted that:

[0037] 1. Certain terms are used in the specification and claims to refer to specific components. Those skilled in the art will understand that different terms may be used to refer to the same component. This specification and claims do not distinguish components based on differences in terminology, but rather on differences in their functions.

[0038] 2. Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by a person of ordinary skill in the art to which this disclosure pertains.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] As attached Figure 1 To be continued Figure 9 As shown in the figure, this embodiment describes a gearbox housing for an electric tricycle, including a transmission gearbox 1 and a gearbox 3.

[0041] The transmission gearbox 1 is provided with an assembly chamber, which is used to install the transmission gear set.

[0042] The gear set includes a drive gear 401, a double gear 402, and a gear shift combination gear 403.

[0043] The top and bottom surfaces of the speed transmission gearbox 1 are provided with mounting holes that are opposite and symmetrical, and the axis of the mounting holes is perpendicular to the top and bottom surfaces of the speed transmission gearbox 1.

[0044] The mounting hole is used to fix and embed the bearing. The mounting hole includes a first mounting hole 101, a second mounting hole 102 and a third mounting hole 103.

[0045] The first mounting hole 101 is used to mount the drive gear 401, and the drive gear 401 is fixedly connected to the first bearing 107 through the first mounting shaft 104;

[0046] The second mounting hole 102 is used to install the double gear 402, which is fixedly connected to the second bearing 108 via the second mounting shaft 105;

[0047] The third mounting hole 103 is used to install the gear shift combination gear 403, which is fixedly connected to the third bearing 109 via the third mounting shaft 106.

[0048] The drive gear 401 meshes with the double gear 402, and the double gear 402 meshes with the shift gear combination 403. The first mounting shaft 104 of the drive gear 401, also known as the docking shaft, is used for fixed connection with an external motor. The driving force provided by the motor is transmitted sequentially through the meshing of the drive gear 401, the double gear 402, and the shift gear combination 403.

[0049] The speed transmission gearbox 1 is provided with a heat dissipation device at one end of its top surface. The heat dissipation device includes heat sinks 501 and partitions 502. Multiple heat sinks 501 are provided and are arranged at equal intervals at one end of the speed transmission gearbox 1 to form multiple heat dissipation chambers. The partitions divide the heat dissipation chambers into a first heat dissipation chamber 503 and a second heat dissipation chamber 504.

[0050] The heat dissipation device is located on the top surface of the transmission gearbox 1, opposite to the bottom surface of the transmission gearbox 1 where the motor is installed. Therefore, the heat generated during motor operation can be quickly dissipated to the surrounding environment through the bearings and heat sink 501. The first heat dissipation cavity 503 and the second heat dissipation cavity 504, divided by the partition 502, further accelerate the heat transfer process. At the same time, in addition to heat dissipation and heat conduction, the partition 502 also reinforces the heat sink 501, increasing the mechanical strength of its location.

[0051] The bottom surface of the speed transmission gearbox 1 is provided with universal motor mounting holes and a sound insulation and noise reduction device.

[0052] The general-purpose motor mounting post includes a set of five-hole motor mounting post 201 and a set of four-hole motor mounting post 202, wherein the five-hole motor mounting post 201 and the four-hole motor mounting post 202 share two bottom posts.

[0053] By setting universal motor mounting holes, the gearbox housing described in this embodiment can be adapted to install four-hole and five-hole motors, increasing the adaptability of the gearbox housing.

[0054] The sound insulation and noise reduction device includes a reinforcing rib 601 and a noise reduction chamber 602.

[0055] The reinforcing rib 601 is disposed between different motor mounting hole posts, and / or disposed between the motor mounting hole post and the outer wall of the first mounting hole 101, and / or disposed between the motor mounting hole post and the outer wall of the second mounting hole 102.

[0056] The reinforcing rib 601, the motor mounting hole post, the first mounting hole 101, the second mounting hole 102, and the bottom surface of the transmission gearbox 1 constitute the noise reduction chamber 602. Since the transmission gearbox 3 does not have a fixed geometric shape, the noise reduction chamber 602 described in this embodiment is not limited to its specific geometric shape and depth. It should be set according to the actual shape of the transmission gearbox 3. However, in order to obtain a better sound insulation and noise reduction effect, multiple noise reduction chambers 602 should be set with different shapes and depths.

[0057] The gearbox 3 is used to install the differential gear 404 and the half-shaft of the electric tricycle. The differential gear 404 meshes with the gear shift combination gear 403 to output the driving force transmitted by the motor to the half-shaft of the electric tricycle, driving the vehicle to complete the corresponding work instructions.

[0058] The gearbox 3 includes a base 301, an upper mounting platform 302, and a lower mounting platform 303.

[0059] The base 301 is designed in a ring shape and is fixedly connected to the end face of the transmission gearbox 1.

[0060] The lower mounting platform 303 is vertically mounted on the base 301 and includes a first lower mounting platform and a second lower mounting platform. The first lower mounting platform and the second lower mounting platform are respectively provided with mounting grooves 304, which are semi-circular, opposite to each other and coaxial.

[0061] The upper mounting platform 302 and the lower mounting platform 303 are fixed together by bolts.

[0062] To reduce the cumulative assembly error caused by splicing multiple components during the assembly of the transmission, and to maintain the concentricity between gears during operation, the transmission housing 3 and the transmission gearbox 1 are integrally formed, i.e., it is set as an integrated transmission housing.

[0063] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A gearbox housing for an electric tricycle, comprising a transmission gearbox and a gearbox housing, characterized in that: The transmission gearbox is provided with an assembly chamber, which is used to install the transmission gear set. A heat dissipation device is provided at one end of the top surface of the speed transmission gearbox; A motor mounting area is provided on the bottom surface of the speed transmission gearbox opposite to the heat dissipation device; The motor mounting area is equipped with a sound insulation and noise reduction device.

2. The gearbox housing for an electric tricycle according to claim 1, characterized in that: The heat dissipation device includes heat sinks, which are arranged at equal intervals at one end of the transmission gearbox, and adjacent heat sinks form a heat dissipation cavity.

3. The gearbox housing for an electric tricycle according to claim 2, characterized in that: The heat dissipation device also includes a partition, which divides the heat dissipation cavity into a first heat dissipation cavity and a second heat dissipation cavity.

4. The gearbox housing for an electric tricycle according to claim 1, characterized in that: The motor mounting area is provided with universal motor mounting holes; The general-purpose motor mounting hole post includes a set of five-hole motor mounting hole posts and a set of four-hole motor mounting hole posts; The five-hole motor mounting post and the four-hole motor mounting post share two bottom posts.

5. The gearbox housing for an electric tricycle according to claim 4, characterized in that: The top and bottom surfaces of the transmission gearbox are provided with mounting holes that are opposite to each other and symmetrical, and bearings are fixedly embedded in the mounting holes. The mounting holes include a first mounting hole, a second mounting hole, and a third mounting hole, wherein the first mounting hole and the second mounting hole are disposed in the motor mounting area; The bearings include a first bearing, a second bearing, and a third bearing; the gear set includes a drive gear, a double gear, and a gear shift combination gear. A first bearing is embedded in the first mounting hole, and the drive gear is fixedly connected to the first bearing via a first mounting shaft. A second bearing is embedded in the second mounting hole for mounting a double gear. A third bearing is embedded in the third mounting hole for mounting a shift gear combination. The first mounting shaft is fixedly connected to the motor, the drive gear meshes with the double gear, and the double gear meshes with the shift gear combination.

6. The gearbox housing for an electric tricycle according to claim 5, characterized in that: The sound insulation and noise reduction device includes reinforcing ribs and a noise reduction chamber; The reinforcing rib connects the motor mounting hole post, and / or connects the motor mounting hole post to the outer wall of the first mounting hole, and / or connects the motor mounting hole post to the outer wall of the second mounting hole; The reinforcing rib, motor mounting hole column, first mounting hole, second mounting hole, and bottom surface of the transmission gearbox constitute a noise reduction chamber.

7. The gearbox housing for an electric tricycle according to claim 1, characterized in that: The gearbox includes a base, an upper mounting platform, and a lower mounting platform; The base is fixedly connected to the end face of the transmission gearbox; The lower mounting platform is disposed on the base and includes a first lower mounting platform and a second lower mounting platform; the first lower mounting platform and the second lower mounting platform are respectively provided with mounting grooves, the mounting grooves are semi-circular, opposite to each other and coaxially arranged. The upper mounting platform and the lower mounting platform are fixedly connected by bolts.

8. A gearbox housing for an electric tricycle according to any one of claims 1-7, characterized in that: The transmission housing and the speed transmission gearbox are integrally formed.

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