Motor driving wheel device

Abstract

The utility model discloses a motor driving wheel device, and belongs to the field of motor driving wheels, the motor driving wheel device comprises a wheel and a fixing frame used for supporting the wheel, a connector is arranged between the wheel and the fixing frame, the two ends of the connector are connected with the wheel and the fixing frame respectively, and the connector is used for being connected with the wheel in a soft start mode. A hub groove is formed in the end, close to the fixing frame, of the wheel, and a positioning hole is formed in the center of the hub groove. The connector comprises a rotor and a connecting shaft, wherein the rotor is rotatably mounted in the positioning hole through a positioning shaft, and the connecting shaft is rotatably mounted on the fixing frame, fixedly connected with the end, away from the positioning shaft, of the rotor and used for being connected with an external motor output device. According to the motor driving wheel device, soft starting and soft braking of the driving wheel are achieved through cooperation of the connector and the buffer spring, impact and abrasion of the driving wheel device during starting and braking are effectively reduced, and therefore the service life of the motor driving wheel device is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of motor-driven wheels, and particularly relates to a motor-driven wheel device. BACKGROUND

[0002] The motor-driven wheel refers to a wheel driven by rotation of a motor.

[0003] The existing motor-driven wheel is generally connected with a motor-driven device through a key groove and a key shaft. However, the direct connection mode also determines the hard driving property. When the driving wheel is applied to a large load scene and a motor with large driving force, hard starting and hard braking are often accompanied, and the connection structure is easily destroyed by stress for long-term use, thereby reducing the service life of the driving wheel.

[0004] Therefore, the application provides a motor-driven wheel device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The application provides a motor-driven wheel device, which aims to solve the problem that the existing motor-driven wheel is easily damaged in a long-term hard starting and hard braking environment through a direct connection mode, thereby reducing the service life.

[0006] To achieve the above object, the application provides the following technical scheme: a motor-driven wheel device, comprising a wheel and a fixing frame for supporting the wheel.

[0007] A connector for connecting the wheel in a soft starting mode is arranged between the wheel and the fixing frame and connected with both of them at two ends. A hub groove is arranged at one end of the wheel close to the fixing frame. A positioning hole is arranged in the center of the hub groove. The connector comprises a rotor rotatably arranged in the positioning hole through a positioning shaft and a connecting shaft rotatably arranged on the fixing frame and fixedly connected with the rotor at an end away from the positioning shaft, which is used for connecting an external motor output device.

[0008] Two fixing blocks are symmetrically fixed to the side wall of the hub groove. Extrusion blocks are symmetrically fixed to the side surface of the rotor. Buffer springs are fixed at positions corresponding to both sides of the fixing blocks in the hub groove. The other ends of the buffer springs are fixed to both sides of the extrusion blocks. In this way, the soft starting and soft braking of the driving wheel are realized through the cooperation of the connector and the buffer springs, the impact and wear of the driving wheel device during starting and braking are effectively reduced, and the service life of the driving wheel device is improved.

[0009] Preferably, a first bearing is welded in the positioning hole, and the positioning shaft is welded with an inner ring of the first bearing.

[0010] Preferably, a second bearing connected with the fixing frame is sleeved outside the connecting shaft, the connecting shaft is welded with the inner ring of the second bearing, and the outer ring of the second bearing is welded with the fixing frame.

[0011] Preferably, a key groove is formed in the end of the connecting shaft away from the rotor.

[0012] Preferably, the key groove is a spline groove.

[0013] Preferably, the buffer spring is a curved spring with a radius consistent with that of the hub groove.

[0014] Preferably, the fixing frame has a mounting plate with at least four mounting holes arranged in a rectangular array.

[0015] Preferably, the end cover for covering the positioning hole is fixedly installed on the end of the wheel away from the connector through a bolt.

[0016] The motor-driven wheel device realizes soft starting and soft braking of the driving wheel through cooperation of the connector and the buffer spring, effectively reduces impact and wear of the driving wheel device during starting and braking, and thus improves the service life thereof. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural diagram of a motor-driven wheel device Figure 1 ;

[0018] Figure 2 It is a structural diagram of a motor-driven wheel device Figure 2 ;

[0019] Figure 3 It is an exploded structural diagram of a motor-driven wheel device.

[0020] In the drawings:

[0021] 1, wheel; 11, hub groove; 12, fixing block; 13, positioning hole; 14, first bearing;

[0022] 2, fixing frame; 21, mounting plate; 211, mounting hole; 22, second bearing;

[0023] 3, connector; 31, rotor; 311, extrusion block; 32, positioning shaft; 33, connecting shaft; 331, key groove;

[0024] 4, buffer spring;

[0025] 5, end cover. DETAILED DESCRIPTION

[0026] With reference to the drawings and embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0027] The present embodiment provides a motor-driven wheel device, as shown in the drawings, the motor-driven wheel device comprises a wheel 1 and a fixed frame 2 for supporting the wheel 1. Figures 1-3

[0028] The wheel 1 and the fixed frame 2 are provided with a connector 3 connected to both ends for connecting to the wheel 1 in a soft start form, the wheel 1 is provided with a hub groove 11 at one end close to the fixed frame 2, the center of the hub groove 11 is provided with a positioning hole 13, the connector 3 comprises a rotor 31 rotatably installed in the positioning hole 13 through a positioning shaft 32 and a connecting shaft 33 rotatably installed on the fixed frame 2 and fixedly connected to the end of the rotor 31 away from the positioning shaft 32 for connecting an external motor output device.

[0029] The side wall of the hub groove 11 is symmetrically fixed with two fixed blocks 12, the side surface of the rotor 31 is symmetrically fixed with extrusion blocks 311, the hub groove 11 is fixed with buffer springs 4 at positions corresponding to both sides of the fixed blocks 12, and the other end of the buffer springs 4 is fixed with the two sides of the extrusion blocks 311 respectively.

[0030] In use, when the external motor starts to work, power is transmitted to the rotor 31 through the connecting shaft 33, since the rotor 31 is connected to the wheel 1 through the buffer spring 4, the rotation of the rotor 31 will drive the wheel 1 to gradually accelerate, realizing soft start, in this process, the buffer spring 4 plays a role of shock absorption and buffering, effectively reducing the impact at start, under the continuous driving of the motor, the wheel 1 rotates at a stable speed, at this time, the buffer spring 4 maintains a certain compression state, providing stable support and buffering for the wheel 1; when braking is needed, the external motor reduces or stops output power, due to the existence of the buffer spring 4, the wheel 1 will not stop rotating immediately, but will gradually slow down, realizing soft braking, this design reduces the impact and wear during braking, prolonging the service life of the driving wheel device.

[0031] Specifically, the first bearing 14 is welded in the positioning hole 13, and the positioning shaft 32 is welded with the inner ring of the first bearing 14; the first bearing 14 is fixed by welding, ensuring the stability of the bearing, and the positioning shaft 32 is welded with the inner ring of the first bearing 14, realizing stable rotation of the rotor 31 in the positioning hole 13, reducing friction and wear.

[0032] ​Specifically, the connecting shaft 33 is externally sleeved with the second bearing 22 connected with the fixed frame 2, the connecting shaft 33 is welded with the inner ring of the second bearing 22, and the outer ring of the second bearing 22 is welded with the fixed frame 2; the outer ring of the second bearing 22 is welded with the fixed frame 2, thereby ensuring the stability of the bearing, and the inner ring is welded with the connecting shaft 33, thereby ensuring the stability of rotation.

[0033] Further, the connecting shaft 33 is externally sleeved with the second bearing 22 connected with the fixed frame 2, the connecting shaft 33 is welded with the inner ring of the second bearing 22, and the outer ring of the second bearing 22 is welded with the fixed frame 2; the outer ring of the second bearing 22 is welded with the fixed frame 2, thereby ensuring the stability of the bearing, and the inner ring is welded with the connecting shaft 33, thereby ensuring the stability of rotation.

[0034] Need to be explained, the buffer spring 4 is a curved spring with a radius consistent with the radius of the hub groove 11; when the rotor 31 rotates, the buffer spring 4 will be deformed, and since its curvature is consistent with the hub groove 11, it will not interfere when deformed in the hub groove 11, thereby more stably absorbing and releasing energy, achieving soft start and soft braking.

[0035] Specifically, the fixed frame 2 has a mounting plate 21 at the top end, and at least four mounting holes 211 are arranged in a rectangular array on the mounting plate 21; the design of the mounting plate 21 and the mounting holes 211 allows the fixed frame 2 to be conveniently fixed on a vehicle or other equipment.

[0036] Further, the wheel 1 is externally sleeved with the end cover 5 for covering the positioning hole 13 through bolt fixation at the end away from the connector 3; the end cover 5 is bolted on the wheel 1 for covering the positioning hole 13, preventing dust and sundries from entering the interior; the design of the end cover 5 can also play a protective and decorative role.

[0037] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical solution and concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An electric motor driven wheel arrangement comprising a wheel (1) and a fixed frame (2) for supporting the wheel (1), characterized in that: The wheel (1) and the fixed frame (2) are provided with a connector (3) connected with both ends for connecting with the wheel (1) in the form of soft start, the wheel (1) is provided with a hub groove (11) near one end of the fixed frame (2), the center of the hub groove (11) is provided with a positioning hole (13), the connector (3) comprises a rotor (31) rotatably installed in the positioning hole (13) through a positioning shaft (32) and a connecting shaft (33) rotatably installed on the fixed frame (2) and fixedly connected with the rotor (31) away from one end of the positioning shaft (32) for connecting the external motor output device; The hub groove (11) is symmetrically provided with two fixed blocks (12) on the side wall, the rotor (31) is symmetrically provided with an extrusion block (311) on the side surface, the hub groove (11) is fixedly provided with a buffer spring (4) at the positions corresponding to the two sides of the fixed block (12), and the other end of the buffer spring (4) is fixedly connected with the two sides of the extrusion block (311).

2. The motor-driven wheel apparatus according to claim 1, characterized by: The positioning hole (13) is welded with a first bearing (14), and the positioning shaft (32) is welded with the inner ring of the first bearing (14).

3. An electric motor driven wheel arrangement according to claim 2, characterised in that: The connecting shaft (33) is externally provided with a second bearing (22) connected with the fixed frame (2), the connecting shaft (33) is welded with the inner ring of the second bearing (22), and the outer ring of the second bearing (22) is welded with the fixed frame (2).

4. An electric motor driven wheel arrangement according to claim 3, characterised in that: The connecting shaft (33) is provided with a key groove (331) away from one end of the rotor (31).

5. An electric motor driven wheel arrangement according to claim 4, characterised in that: The key groove (331) is a spline groove.

6. An electric motor driven wheel arrangement according to claim 5, characterised in that: The buffer spring (4) is a curved spring with a radius consistent with the radius of the hub groove (11).

7. An electric motor driven wheel arrangement according to claim 6, characterised in that: The fixed frame (2) is provided with a mounting plate (21) at the top end, and the mounting plate (21) is provided with at least four mounting holes (211) arranged in a rectangular array.

8. An electric motor driven wheel arrangement according to claim 7, characterised in that: The wheel (1) is provided with an end cover (5) for covering the positioning hole (13) through bolt fixing at one end away from the connector (3).

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