Compact motor output end structure

Abstract

The utility model relates to a compact motor output end structure, which comprises an output gear shaft, the end part of the output gear shaft is provided with a tooth part, the end part of the tooth part is meshed with a transmission gear, the part of the tooth part, which is not meshed with the transmission gear, is provided with a bearing retainer, and the bearing retainer is sleeved with a bearing; a contact annular face is formed on the outer side face of the bearing block, and the inner side face of the bearing makes contact with the contact annular face. And the diameter of the bearing retainer is greater than that of the tooth part. Compared with the prior art, the bearing retainer occupies the tooth part which is not meshed on the output gear shaft, and the tooth part which is not meshed on the output gear shaft is fully utilized, so that the structure of the end part of the output gear shaft is more compact, and the arrangement of each position at the output end of the motor is optimized to reduce the occupied axial space; therefore, sufficient axial space is reserved for the arrangement of the stator and the rotor, the stacking height of the stator and the rotor is ensured, and ideal output power and torque of the motor are realized.

Description

Technical Field

[0001] The utility model relates to a compact motor output terminal structure, belonging to the technical field of motors. Background Art

[0002] Electric vehicles include electric bicycles, electric motorcycles, electric cars, etc. A large number of electric vehicles are powered by inner rotor motors, and the output power and torque of inner rotor motors are related to the stator and rotor stacking height of the motors. At present, inner rotor motors used in vehicles need to be installed in a limited axial space of the frame, but the installation distribution of various components in the existing frame is loose, occupying a large space, resulting in very limited remaining axial space of the frame, so that the stator and rotor stacking height of the motor is also limited, which is not conducive to the improvement of the motor output power. Utility Model Content

[0003] The utility model aims to provide a compact motor output end structure in view of the shortcomings of the prior art, in which a bearing stop occupies the non-engaging tooth portion of the output gear, so that the structure of the output gear shaft end is more compact.

[0004] To achieve the purpose, the technical solution adopted by the utility model is:

[0005] A compact motor output end structure comprises an output gear shaft, wherein a tooth portion is provided at the end of the output gear shaft, the end of the tooth portion is meshed with a transmission gear, a bearing stopper is provided at a portion of the tooth portion that is not meshed with the transmission gear, and a bearing is sleeved on the bearing stopper.

[0006] As a further optimization of the above technical solution: a contact annular surface is formed on the outer side surface of the bearing stopper, and the inner side surface of the bearing is in contact with the contact annular surface.

[0007] As a further optimization of the above technical solution: the diameter of the bearing stopper is larger than the diameter of the tooth portion.

[0008] As a further optimization of the above technical solution: an oil seal block is also provided on the output gear shaft, the oil seal block is located at the tail of the bearing block, an oil seal is sleeved on the oil seal block, and the inner lip of the oil seal is in contact with the side surface of the oil seal block.

[0009] As a further optimization of the above technical solution: the diameter of the oil seal is larger than the diameter of the bearing stopper, and the bottom surface of the bearing is in contact with the oil seal stopper.

[0010] As a further optimization of the above technical solution: a first annular sealing ring groove is formed at the bottom of the bearing stopper, a first O-ring is arranged in the first sealing ring groove, and the bearing and the output gear shaft are sealed by the first O-ring and the oil seal.

[0011] As a further optimization of the above technical solution: it also includes a box cover and a motor housing, and the box cover is arranged on the motor housing.

[0012] As a further optimization of the above technical solution: a positioning ring in contact with the outer side of the oil seal is formed on the box cover, and a circle of grooves is formed on the inner side of the positioning ring, and the grooves include right-angle grooves, and the rubber on the outer side of the oil seal is stuck in the grooves and in contact with the right-angled sides of the right-angle grooves.

[0013] As a further optimization of the above technical solution: the groove also includes an oblique groove located above the right-angle groove, and the oblique groove is connected to the right-angle groove.

[0014] Compared with the prior art, the bearing stopper in the utility model occupies the tooth portion on the output gear shaft that is not meshing, and makes full use of the tooth portion on the output gear shaft that is not meshing, so that the structure of the end of the output gear shaft is more compact, and the arrangement of various positions at the output end of the motor is optimized to reduce the occupied axial space, thereby leaving sufficient axial space for the setting of the stator and rotor, ensuring the stacking height of the stator and rotor, and realizing the ideal output power and torque of the motor; double sealing is achieved between the bearing and the output gear shaft through the first O-ring and the oil seal, and the sealing effect is good; a right-angle groove and an inclined groove are provided on the inner side surface of the positioning ring, and the inclined groove facilitates the installation of the oil seal from bottom to top to avoid scratching the rubber layer on the outer side surface of the oil seal when the oil seal is installed; after the oil seal is installed, the rubber on the outer side surface of the oil seal pops out and is stuck in the groove, and the right-angle side of the right-angle groove supports the rubber part that pops out on the outer side surface of the oil seal, so as to prevent the oil seal from being pushed out due to the increase of air pressure in the gear box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0016] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the output gear shaft in the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. Figure 1-3As shown, the compact motor output end structure includes a motor housing 1 and an output gear shaft 2. The end of the output gear shaft 2 passes through the rotor, and is provided with an oil seal 22 and a tooth portion 21 in sequence, and the end of the tooth portion 21 is meshed with the transmission gear 7. A bearing stopper 23 is provided at the portion of the tooth portion 21 that is not meshed with the transmission gear 7. The diameter of the bearing stopper 23 is greater than the diameter of the tooth portion 21, and a contact annular surface 25 is formed on the outer side of the bearing stopper 23. A bearing 3 is sleeved on the bearing stopper 23, and the inner side of the bearing 3 is in contact with the contact annular surface 25. The bearing stopper 23 positions the installation of the bearing to ensure the installation concentricity. The bearing stopper 23 occupies the tooth portion 21 on the output gear shaft 2 that is not meshed, and makes full use of the tooth portion 21 on the output gear shaft 2 that is not meshed, so as to make the structure of the end of the output gear shaft 2 more compact, optimize the arrangement of each position at the output end of the motor to reduce the occupied axial space, thereby leaving sufficient axial space for the setting of the stator and rotor, ensuring the stator and rotor stacking height, and realizing the ideal output power and torque of the motor.

[0019] In the above technical solution: the oil seal 22 is located at the tail of the bearing stop 23, the diameter of the oil seal 22 is larger than the diameter of the bearing stop 23, the bottom of the bearing stop 23 is formed with an annular first sealing ring groove 24, and the first O-ring 4 is arranged in the first sealing ring groove 24. When the bearing 3 is sleeved on the bearing stop 23, the bottom surface of the bearing 3 is in contact with the oil seal 22, and the bearing 3 and the output gear shaft 2 are sealed by the first O-ring 4.

[0020] In the above technical solution: an oil seal 5 is sleeved on the oil seal baffle 22 , an inner lip of the oil seal 5 is in contact with the side surface of the oil seal baffle 22 , and the oil seal 5 performs secondary sealing between the bearing 3 and the output gear shaft 2 .

[0021] The above technical solution also includes a box cover 6, on which a positioning ring 61 in contact with the outer side of the oil seal 5 is formed, and a circle of grooves is formed on the inner side of the positioning ring 61, and the grooves include a right-angle groove 62 and an inclined groove 63 located above the right-angle groove 62, and the inclined groove 63 is connected to the right-angle groove 62. The inclined groove 63 facilitates the oil seal 5 from bottom to top, and avoids scratching the rubber layer on the outer side of the oil seal 5 when the oil seal 5 is installed. After the oil seal 5 is installed, the rubber on the outer side of the oil seal 5 pops out and is stuck in the groove, and the right-angled side of the right-angle groove 62 supports the rubber part that pops out of the outer side of the oil seal 5, so as to prevent the oil seal 5 from being pushed out due to the increase of air pressure in the gear box.

[0022] The utility model is particularly suitable for the output end of an inner rotor toothed motor.

[0023] 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 compact motor output end structure, comprising an output gear shaft (2), wherein the end of the output gear shaft (2) is provided with a tooth portion (21), and the end of the tooth portion (21) is meshed with a transmission gear (7). Features A bearing stopper (23) is provided at a portion of the tooth portion (21) that is not meshed with the transmission gear (7), and a bearing (3) is sleeved on the bearing stopper (23).

2. The compact motor output terminal structure according to claim 1, Features The outer side surface of the bearing stopper (23) is formed with a contact annular surface (25), and the inner side surface of the bearing (3) is in contact with the contact annular surface (25).

3. The compact motor output terminal structure according to claim 1, Features The diameter of the bearing stopper (23) is greater than the diameter of the tooth portion (21).

4. The compact motor output terminal structure according to claim 1, Features The output gear shaft (2) is also provided with an oil seal (22), the oil seal (22) is located at the rear of the bearing block (23), an oil seal (5) is sleeved on the oil seal (22), and the inner lip of the oil seal (5) is in contact with the side surface of the oil seal (22).

5. The compact motor output terminal structure according to claim 4, Features The diameter of the oil seal (22) is greater than the diameter of the bearing stop (23), and the bottom surface of the bearing (3) is in contact with the oil seal (22).

6. The compact motor output terminal structure according to claim 5, Features The bottom of the bearing stopper (23) is provided with an annular first sealing ring groove (24), a first O-ring (4) is arranged in the first sealing ring groove (24), and the bearing (3) and the output gear shaft (2) are sealed by the first O-ring (4) and the oil seal (5).

7. The compact motor output terminal structure according to claim 4, Features It also comprises a box cover (6) and a motor housing (1), wherein the box cover (6) is arranged on the motor housing (1).

8. The compact motor output terminal structure according to claim 7, Features The box cover (6) is provided with a positioning ring (61) in contact with the outer side surface of the oil seal (5); the inner side surface of the positioning ring (61) is provided with a circle of grooves, the grooves including right-angle grooves (62); the rubber on the outer side surface of the oil seal (5) is inserted into the grooves and in contact with the right-angled sides of the right-angle grooves (62).

9. The compact motor output terminal structure according to claim 8, Features The groove further comprises an oblique groove (63) located above the right-angle groove (62), and the oblique groove (63) is connected to the right-angle groove (62).

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