Middle motor structure with power output part and motor main body on same side
By setting bridge gears and mandrels in the middle motor, the compression of the motor axial space and tire centering solution is achieved, and the tire eccentricity problem caused by the large axial size of the motor in the prior art is solved, providing flexible The effect of adjusting the transmission structure position and reducing the risk of oil leakage.
Patent Information
- Application Number
- CN202420053189.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-09
AI Technical Summary
The flywheel or pulley of the existing mid-mounted motor is installed directly on the motor shaft or on the end cover, resulting in large axial dimensions of the motor, resulting in the tire eccentricity when the flat-split is opened or the wheels need to be raised to center the tire, adding a frame complexity.
Using a mid-mounted motor structure on the same side of the motor main body, the driving gear, driven gear and bridge gear are arranged in the gear box, so that the output shaft is located outside the motor casing, and the transmission structure and the motor casing are located in the gear box. On the same side, the axial space of the motor is compressed, and the position of the transmission structure is adjusted through the mandrel and the ear hook to keep the tire centered.
The axial space of the motor is compressed, the tires are installed in a center, the transmission structure position can be adjusted, which meets different needs and reduces the risk of oil leakage.
Smart Images
Figure CN222169536U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a mid-mounted motor structure with a power output part and a motor body on the same side, belonging to the technical field of mid-mounted motors. Background Art
[0002] In the prior art, the flywheel or pulley of the mid-mounted motor is usually directly installed on the motor shaft or on the motor end cover. This installation method causes the axial dimension of the entire motor to be large, and the matching installation part on the frame needs to be raised outward, resulting in eccentric installation of the tire when the fork has a narrow gear, or the sprocket on the wheel is raised and the frame is widened in order to center the tire. Utility Model Content
[0003] The purpose of the utility model is to provide a central motor structure in which the transmission structure and the motor housing are located on the same side of the gear box, thereby compressing the axial space of the motor and keeping the power output part with the tire centrally installed on the same side as the motor body.
[0004] To achieve the purpose, the technical solution adopted by the utility model is:
[0005] A mid-mounted motor structure with a power output portion and a motor body on the same side, comprising a motor housing, a gear box, and a driving gear, a driven gear, and a bridge gear located in the gear box, wherein the bridge gear is located between the driving gear and the driven gear, and the bridge gear is meshed with the driving gear and the driven gear, a motor shaft in the motor body is connected to the driving gear, the driven gear is connected to an output shaft, a transmission structure is sleeved on the end of the output shaft, the bridge gear enables the output shaft to be located outside the motor housing, and the transmission structure and the motor housing are located on the same side of the gear box.
[0006] As a further optimization of the above technical solution: the transmission structure is a flywheel or a pulley.
[0007] As a further optimization of the above technical solution: it also includes a motor end cover and a plurality of lug seats, the gear box and the motor end cover are respectively installed on the two sides of the motor housing, some of the lug seats are located on the motor end cover as lug points on the motor end cover, and the transmission structure is located between the gear box and the lug points of the motor end cover.
[0008] As a further optimization of the above technical solution: an output tooth portion is provided at the end of the output shaft, the transmission structure is sleeved on the output tooth portion, a bushing is also sleeved on the output tooth portion, a retaining spring groove is formed at the end of the output tooth portion, a retaining spring is provided in the retaining spring groove, and two side surfaces of the transmission structure are in contact with the bushing and the retaining spring.
[0009] As a further optimization of the above technical solution: the output shaft and the driven gear are integrally formed.
[0010] As a further optimization of the above technical solution: the motor shaft and the driving gear are integrally formed.
[0011] As a further optimization of the above technical solution: a core rod is provided at the center of the output shaft, the core rod is passed through the output shaft through a bearing, and both ends of the core rod protrude from the output shaft and are fixed on the frame as hanging ear points.
[0012] As a further optimization of the above technical solution: oil seals are also provided at both ends of the bearing on the core rod.
[0013] As a further optimization of the above technical solution: a stator, a motor shaft and a rotor sleeved on the motor shaft are arranged in the motor housing, and an end of the motor shaft extends out of the rotor and is connected to the driving gear.
[0014] As a further optimization of the above technical solution: it also includes a positioning frame, the positioning frame and the gear box are integrally formed, and the output shaft is inserted into the positioning frame through a bearing.
[0015] Compared with the prior art, the utility model is provided with a bridge gear, which lengthens the distance between the center of the driving gear and the center of the driven gear, so that the output shaft as the power output is located on the outside of the motor housing, and at the same time, the power output end at the end of the output shaft - the transmission structure and the motor housing are located on the same side of the gear box, thereby realizing the compression of the axial space of the motor, and enabling the position of the transmission structure on the output shaft to match the tire design, thereby keeping the tire installed in the center of the frame flat fork; the transmission structure can be fixed at any position between the gear box and the ear-hanging point of the motor end cover, and the axial fixed position of the transmission structure has a large adjustable range to meet different transmission structure position requirements; a core rod is provided at the center of the output shaft, and both ends of the core rod protrude from the output shaft and are fixed on the frame as ear-hanging points, thereby fixing the centerline position of the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.
[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model. DETAILED DESCRIPTION
[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figure 1-2As shown, a mid-mounted motor structure with a power output portion and a motor body on the same side includes a motor body, a gear box 5, and a driving gear 1, a driven gear 2, and a bridge gear 3 located in the gear box 5. The bridge gear 3 is located between the driving gear 1 and the driven gear 2 and meshes with both the driving gear 1 and the driven gear 2. The motor body includes a motor housing 4, and a stator 10, a motor shaft 8, and a rotor 9 sleeved on the motor shaft 8 are arranged in the motor housing 4. The end of the motor shaft 8 extends out of the rotor 9 and is connected to the driving gear 1. In the utility model, the motor shaft 8 and the driving gear 1 are integrally formed. The driven gear 2 is connected to an output shaft 7. In the utility model, the output shaft 7 and the driven gear 2 are integrally formed. The end of the output shaft 7 is provided with an output tooth portion 71, and a transmission structure is sleeved on the output tooth portion 71. The transmission structure is a flywheel 11 or a pulley, etc. This embodiment mainly takes the flywheel 11 as an example. The transmission structure and the output shaft 7 can also be fixed by a flat key plus a nut. The bridge gear 3 lengthens the distance between the center of the driving gear 1 and the center of the driven gear 2, so that the output shaft 7 as the power output is located outside the motor housing 4, and at the same time, the power output end at the end of the output shaft 7 - the transmission structure and the motor housing 4 are located on the same side of the gear box 5, thereby realizing the compression of the axial space of the motor and enabling the position of the transmission structure on the output shaft 7 to cooperate with the tire design, thereby keeping the tire installed in the center of the frame flat fork.
[0019] The above technical solution also includes a motor end cover 16 , and the gear box 5 and the motor end cover 16 are respectively installed on two side surfaces of the motor housing 4 .
[0020] In the above technical solution: a bushing 12 is sleeved on the output tooth portion 71, a retaining spring groove is formed at the end of the output tooth portion 71, a retaining spring 13 is arranged in the retaining spring groove, and the two side surfaces of the transmission structure are in contact with the bushing 12 and the retaining spring 13, and the bushing 12 and the retaining spring 13 position the transmission structure.
[0021] In the above technical solution: it also includes a positioning frame 6, which is integrally formed with the gear box 5, rather than integrally formed with the motor housing 4, effectively reducing the risk of oil leakage. The output shaft 7 is inserted into the positioning frame 6 through a bearing, and the positioning frame 6 positions the output shaft 7 with a longer length. When the transmission structure is located on the left side of the tire, the positioning frame 6 is short and a short output shaft 7 is used; when the transmission structure is located on the right side of the tire, the positioning frame 6 is long and a long output shaft 7 is used.
[0022] In the above technical solution: a core rod 14 is provided at the center of the output shaft 7, and the core rod 14 is inserted into the output shaft 7 through a bearing, and both ends of the core rod 14 protrude from the output shaft 7 and are fixed on the frame as hanging ears, thereby fixing the centerline position of the output shaft 7. In actual production applications, the core rod 14 is not necessary. Oil seals are also provided at both ends of the bearing on the core rod 14, and the oil seals prevent mud and sand from entering to affect the bearing life.
[0023] In the above technical solution, a plurality of lug seats 15 are also included, and the lug seats 15 are arranged on the motor end cover 16 and / or the gear box 5. Two lug seats 15 are arranged on the motor end cover 16, and these two lug seats 15 plus the lug point at the end of the mandrel 14 make one side of the motor have three lug points, and the connection line of the three lug points is a triangle.
[0024] As long as the transmission structure does not exceed the plane where the ear points on the motor end cover 16 are located, it will not affect the axial space of the motor. Therefore, the transmission structure can be fixed at any position between the gear box 5 and the ear points of the motor end cover 16. In the structure using the mandrel 14, the transmission structure is located between the gear box 5 and the ear points at the end of the mandrel 14. The axial position of the transmission structure can be adjusted in a large range to meet different transmission structure position requirements. After the transmission structure position is moved, a small range of movement can be adjusted by repositioning the bushing 12, and a large range of movement can be adjusted by replacing the gear box 5 and the output shaft 7 of the corresponding length.
[0025] The preferred specific embodiments of the present utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the present utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should fall within the protection scope of the present utility model.
Claims
1. A mid-mounted motor structure with the power output portion and the motor body on the same side, Features The invention comprises a motor housing (4), a gear box (5), and a driving gear (1), a driven gear (2), and a bridge gear (3) located in the gear box (5); the bridge gear (3) is located between the driving gear (1) and the driven gear (2); the bridge gear (3) is meshed with the driving gear (1) and the driven gear (2); a motor shaft (8) in the motor body is connected to the driving gear (1); the driven gear (2) is connected to an output shaft (7); a transmission structure is sleeved on the end of the output shaft (7); the bridge gear (3) enables the output shaft (7) to be located outside the motor housing (4); and the transmission structure and the motor housing (4) are located on the same side of the gear box (5).
2. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features The transmission structure is a flywheel (11) or a pulley.
3. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features It also includes a motor end cover (16) and a plurality of lug seats (15), wherein the gear box (5) and the motor end cover (16) are respectively mounted on two side surfaces of the motor housing (4), and some of the lug seats (15) are located on the motor end cover (16) as lug points on the motor end cover (16), and the transmission structure is located between the lug points of the gear box (5) and the motor end cover (16).
4. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features An output tooth portion (71) is provided at the end of the output shaft (7), the transmission structure is sleeved on the output tooth portion (71), a bushing (12) is also sleeved on the output tooth portion (71), a retaining spring groove is formed at the end of the output tooth portion (71), a retaining spring (13) is provided in the retaining spring groove, and two side surfaces of the transmission structure are in contact with the bushing (12) and the retaining spring (13).
5. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features The output shaft (7) and the driven gear (2) are integrally formed.
6. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features The motor shaft (8) and the driving gear (1) are integrally formed.
7. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features A core rod (14) is provided at the center of the output shaft (7). The core rod (14) is inserted into the output shaft (7) through a bearing. Both ends of the core rod (14) protrude from the output shaft (7) and are fixed on the vehicle frame as hanging ear points.
8. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 7, Features Oil seals are also provided at both ends of the bearing on the core rod (14).
9. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features A stator (10), a motor shaft (8) and a rotor (9) sleeved on the motor shaft (8) are arranged in the motor housing (4); an end of the motor shaft (8) extends out of the rotor (9) and is connected to the driving gear (1).
10. A mid-mounted motor structure with a power output portion and a motor body on the same side as claimed in claim 1, Features It also comprises a positioning frame (6), wherein the positioning frame (6) is integrally formed with the gear box (5), and the output shaft (7) is inserted into the positioning frame (6) via a bearing.