Wheel rotating speed detection mechanism based on resolver

Abstract

The utility model discloses a wheel rotating speed detection mechanism based on a resolver, which is characterized in that a hub motor shell assembly is internally provided with a speed measurement driving gear which rotates synchronously with the hub motor shell assembly, and a tooth part of a speed measurement driven gear is positioned on one side, close to the speed measurement driving gear, of a stator bracket and is meshed with the speed measurement driving gear; a controller is installed on the side, away from the speed measurement driving gear, of the stator support, a rotary transformer right facing the shaft installation hole is integrated on the controller, and therefore the rotating speed of the shaft portion of the driven gear can be detected through the rotary transformer. According to the wheel rotating speed detection mechanism based on the resolver, due to the fact that the speed measurement driving gear and the speed measurement driven gear are in the meshing relation, the matching precision is high, the rotating speed of the speed measurement driven gear can be accurately and rapidly detected through the resolver, and compared with a traditional mode that a Hall sensor is matched with a magnetic ring, the rotating speed of the wheel can be accurately and rapidly detected. The detection precision is greatly improved, the response delay is greatly reduced, and higher use requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel rotational speed detection technical field, concretely relates to a wheel rotational speed detection mechanism based on resolver. BACKGROUND

[0002] With the rapid development of electric two-wheel vehicle technology, the popularity rate of electric two-wheel vehicle is rapidly improved. The existing electric two-wheel vehicle generally adopts the form of hub motor to drive.

[0003] At present, the wheel rotational speed of hub motor is usually detected by the way of hall sensor cooperating with magnetic ring to calculate the rotational speed of wheel. Due to the congenital limitation of hall sensor counting mode detection, not only the accuracy of vehicle speed detection is not high, but also the response delay is large, which cannot adapt to higher use demand.

[0004] It is urgent to solve the above problems. UTILITY MODEL CONTENT

[0005] In order to solve the technical problems of low accuracy and large response delay of electric two-wheel vehicle wheel rotational speed detection, the utility model provides a wheel rotational speed detection mechanism based on resolver.

[0006] Its technical scheme is as follows:

[0007] A wheel rotational speed detection mechanism based on resolver, comprising a wheel shaft and a hub motor shell assembly rotatably sleeved on the wheel shaft, a stator support is synchronously sleeved on the wheel shaft, a stator winding is synchronously sleeved on the stator support, a rotor synchronously rotating with the hub motor shell assembly is installed in the hub motor shell assembly, the rotor is surrounded outside the stator winding and can rotate under the drive of the stator winding, a speed measuring driving gear synchronously rotating with the hub motor shell assembly is installed in the hub motor shell assembly, an axle mounting hole is formed in the stator support, the axle part of the speed measuring driven gear is rotatably installed in the axle mounting hole, the tooth part of the speed measuring driven gear is located on the side of the stator support close to the speed measuring driving gear and is engaged with the speed measuring driving gear, a controller is installed on the side of the stator support away from the speed measuring driving gear, the resolver opposite to the axle mounting hole is integrated on the controller, so that the rotational speed of the axle part of the driven gear can be detected through the resolver.

[0008] Compared with the prior art, the utility model has the beneficial effects:

[0009] The wheel rotating speed detection mechanism based on a resolver has the following technical scheme: the measuring speed driving gear and the measuring speed driven gear are in meshing relationship, the matching precision is high, the rotating speed of the measuring speed driven gear can be accurately and quickly detected through the resolver, compared with the traditional Hall sensor matching magnetic ring mode, the detection precision is greatly improved, the response delay is greatly reduced, and higher use requirements are met. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic view of the utility model;

[0011] Figure 2 It is a matching relationship schematic view of the measuring speed driving gear and the measuring speed driven gear;

[0012] Figure 3 It is a structural schematic view of the stator support. DETAILED DESCRIPTION

[0013] The utility model is further described below in combination with embodiments and drawings.

[0014] As shown in Figure 1 A wheel rotating speed detection mechanism based on a resolver mainly comprises a wheel shaft 1 and a hub motor shell assembly 2 rotatably sleeved on the wheel shaft 1, the wheel shaft 1 is synchronously rotatably sleeved with a stator support 3, the stator support 3 is synchronously rotatably sleeved with a stator winding 4, the hub motor shell assembly 2 is installed with a rotor 5 synchronously rotating therewith, the rotor 5 is surrounded outside the stator winding 4, and the stator winding 4 can drive the rotor 5 to rotate after being electrified.

[0015] Please refer to Figures 1-3The wheel hub motor shell assembly 2 is provided with a synchronous rotation speed measuring driving gear 6, and the synchronous rotation speed measuring driving gear 6 is coaxially arranged with the wheel hub motor shell assembly 2. The stator support 3 is provided with an axle mounting hole 3a1, and an axle part of a synchronous rotation speed measuring driven gear 7 is rotatably mounted in the axle mounting hole 3a1. The gear part of the synchronous rotation speed measuring driven gear 7 is located on the side of the stator support 3 close to the synchronous rotation speed measuring driving gear 6, and the gear part of the synchronous rotation speed measuring driven gear 7 is engaged with the synchronous rotation speed measuring driving gear 6. The side of the stator support 3 away from the synchronous rotation speed measuring driving gear 6 is provided with a controller 8, and the controller 8 is integrated with a resolver 8a which can be a motor encoder. The resolver 8a is opposite to the axle mounting hole 3a1, so that the rotation speed of the axle part of the synchronous rotation speed measuring driven gear 7 can be detected by the resolver 8a. Therefore, the rotation speed of the synchronous rotation speed measuring driving gear 6 can be accurately obtained according to the rotation speed of the synchronous rotation speed measuring driven gear 7 detected by the resolver 8a. Since the rotation speed of the wheel hub motor shell assembly 2 is the same as the rotation speed of the synchronous rotation speed measuring driving gear 6, the rotation speed of the wheel hub motor shell assembly 2 can be accurately obtained. Compared with the traditional mode of the Hall sensor cooperating with a magnetic ring, the detection accuracy is greatly improved, the response delay is greatly reduced, and higher use requirements are met.

[0016] Please refer to Figure 1 The wheel hub motor shell assembly 2 comprises a motor shell 2f, a wheel hub 2a which is synchronously rotated and surrounds the outer periphery of the motor shell 2f, and a first end cover 2b and a second end cover 2c which are relatively fixed and cover the two sides of the motor shell 2f. The first end cover 2b and the second end cover 2c are rotatably sleeved on the wheel shaft 1. The wheel hub 2a is fixedly installed on the outer peripheral surface of the motor shell 2f. The two sides of the motor shell 2f are fixedly connected with the outer edges of the first end cover 2b and the second end cover 2c respectively, so that the motor shell 2f, the first end cover 2b and the second end cover 2c form a motor installation space. The stator support 3, the stator winding 4 and the rotor 5 are located in the motor installation space. The rotor 5 is synchronously rotated and installed on the inner peripheral surface of the motor shell 2f. The synchronous rotation speed measuring driving gear 6 is synchronously rotated and installed on the inner side of the first end cover 2b. Through such a design, the structure is stable and reliable, which can not only protect the components in the motor installation space, but also facilitate maintenance and maintenance.

[0017] In the embodiment, the first end cover 2b and the second end cover 2c are rotatably sleeved on the wheel shaft 1 through the first bearing 9, which is simple and reliable. Specifically, the inner side of the first end cover 2b is recessed to form a bearing mounting groove 2b1 matched with the first bearing 9. The synchronous rotation speed measuring driving gear 6 is locked on the first end cover 2b by a plurality of screws, wherein the screws are uniformly distributed in the circumferential direction to ensure the reliable connection of the synchronous rotation speed measuring driving gear 6. The inner ring of the synchronous rotation speed measuring driving gear 6 is integrally formed with a bearing pressing ring 6a which protrudes into the bearing mounting groove 2b1. The bearing pressing ring 6a presses the first bearing 9 in the bearing mounting groove 2b1, thereby ensuring the reliable installation of the first bearing 9.

[0018] Please refer to Figures 1-3 The stator support 3 is recessed on one side close to the controller 8 to form a first annular groove 3b, and the controller 8 is installed in the first annular groove 3b, which not only ensures reliable installation of the controller 8, but also avoids interference with surrounding components.

[0019] Correspondingly, the stator support 3 is recessed on one side close to the speed measuring driving gear 6 to form a second annular groove 3c, and the second annular groove 3c has a plurality of radial support reinforcing ribs 3d, which are uniformly distributed in the circumferential direction, thereby achieving lightweight design and ensuring the structural strength of the stator support 3.

[0020] The bottom of the second annular groove 3c is integrally formed with a bearing seat 3a, the bearing seat 3a is provided with a shaft mounting hole 3a1, and the speed measuring driven gear 7 is rotatably installed in the shaft mounting hole 3a1 through the second bearing 10, thereby ensuring the installation reliability of the speed measuring driven gear 7.

[0021] Meanwhile, the bearing seat 3a is provided with a bearing seat cover 11 for pressing the second bearing 10 in the shaft mounting hole 3a1 through a screw, thereby ensuring the installation reliability of the second bearing 10.

[0022] In the embodiment, the diameter of the speed measuring driving gear 6 is greater than that of the speed measuring driven gear 7, and the large gear drives the small gear, thereby reasonably utilizing the installation space and ensuring high measurement accuracy.

[0023] In addition, the stator support 3 is integrally formed as a whole, has high structural strength, good stability, and is durable.

[0024] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0025] In the utility model, unless otherwise specified and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include the first and second features in direct contact, or the first and second features not in direct contact but in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is less than the second feature in horizontal height.

[0027] Finally, it needs to be pointed out that the above description is only the preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without violating the purpose and claims of the present application. Such changes fall within the scope of protection of the present application.

Claims

1. A wheel speed detection mechanism based on a resolver, comprising a wheel axle (1) and a hub motor housing assembly (2) mounted on the wheel axle (1), wherein a stator bracket (3) is synchronously mounted on the wheel axle (1), and a stator winding (4) is synchronously mounted on the stator bracket (3), and a rotor (5) is installed in the hub motor housing assembly (2) and rotates synchronously therewith, the rotor (5) surrounding the stator winding (4) and being able to rotate under the drive of the stator winding (4), characterized in that: The hub motor housing assembly (2) is equipped with a speed measuring drive gear (6) that rotates synchronously with it. The stator bracket (3) has a shaft mounting hole (3a1). The shaft of the speed measuring driven gear (7) is rotatably installed in the shaft mounting hole (3a1). The teeth of the speed measuring driven gear (7) are located on the side of the stator bracket (3) close to the speed measuring drive gear (6) and mesh with the speed measuring drive gear (6). A controller (8) is installed on the side of the stator bracket (3) away from the speed measuring drive gear (6). The controller (8) integrates a resolver (8a) facing the shaft mounting hole (3a1), so that the rotational speed of the shaft of the speed measuring driven gear (7) can be detected by the resolver (8a).

2. The wheel speed detection mechanism based on a resolver according to claim 1, characterized in that: The hub motor housing assembly (2) includes a motor housing (2f), a hub (2a) that rotates synchronously around the outer periphery of the motor housing (2f), and a first end cover (2b) and a second end cover (2c) that are fixedly fitted onto both sides of the motor housing (2f). The first end cover (2b) and the second end cover (2c) are rotatably mounted on the wheel axle (1). The motor housing (2f), the first end cover (2b), and the second end cover (2c) together form a motor mounting space. The stator bracket (3), the stator winding (4), and the rotor (5) are all located in the motor mounting space. The rotor (5) is synchronously rotated and mounted on the inner circumferential surface of the motor housing (2f). The speed measuring drive gear (6) is synchronously rotated and mounted on the inner side of the first end cover (2b).

3. The wheel speed detection mechanism based on a resolver according to claim 2, characterized in that: The first end cap (2b) and the second end cap (2c) are both rotatably mounted on the wheel axle (1) via the first bearing (9).

4. The wheel speed detection mechanism based on a resolver according to claim 3, characterized in that: The inner side of the first end cover (2b) is recessed to form a bearing mounting groove (2b1) that is adapted to the first bearing (9). The speed measuring drive gear (6) is locked on the first end cover (2b) by a number of screws. The inner ring of the speed measuring drive gear (6) is integrally formed with a bearing clamping ring (6a) protruding into the bearing mounting groove (2b1). The bearing clamping ring (6a) presses the first bearing (9) into the bearing mounting groove (2b1).

5. The wheel speed detection mechanism based on a resolver according to claim 1, characterized in that: The stator support (3) has a first annular groove (3b) recessed on the side near the controller (8), and the controller (8) is installed in the first annular groove (3b).

6. The wheel speed detection mechanism based on a resolver according to claim 1 or 5, characterized in that: The stator support (3) has a second annular groove (3c) recessed on the side near the speed measuring drive gear (6). The second annular groove (3c) has a number of radially extending support reinforcing ribs (3d), and each support reinforcing rib (3d) is evenly distributed circumferentially. The bottom of the second annular groove (3c) is integrally formed with a bearing seat (3a), and the bearing seat (3a) is provided with the shaft mounting hole (3a1).

7. The wheel speed detection mechanism based on a resolver according to claim 6, characterized in that: The speed measuring driven gear (7) is rotatably mounted in the shaft mounting hole (3a1) via the second bearing (10).

8. The wheel speed detection mechanism based on a resolver according to claim 7, characterized in that: The bearing housing (3a) is fitted with a bearing housing cover (11) by screws on the end face of the bearing housing (3a) for pressing the second bearing (10) into the shaft mounting hole (3a1).

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