WO2015149626A1

WO2015149626A1 - Apparatus for sensing electric vehicle mechanics

Info

Publication number: WO2015149626A1
Application number: PCT/CN2015/074546
Authority: WO
Inventors: 康献兵
Original assignee: 昆山攀登变频电子科技有限公司
Priority date: 2014-04-03
Filing date: 2015-03-18
Publication date: 2015-10-08

Abstract

Disclosed is an apparatus for sensing electric vehicle mechanics, having a roller shaft (10), a bearing (11), a bushing (12), and a bowl bearing (13); the bearing (11) is sheathed on the roller shaft (10); the bushing (12) is sheathed on the roller shaft (10) and a first end part (121) of the bushing (12) is sheathed on the bearing (11); the bowl bearing (13) is sheathed on the first end part (121) of the bushing (12); and the first end part (121) of the bushing (12) comprises at least one elastic deformation element (122). The apparatus for sensing electric vehicle mechanics has an ingenious and simple structure, is easy to assemble and can accurately sense the magnitude of force to which the electric vehicle is subjected, without changing existing overall vehicle structure but with excellent universality.

Description

Electric vehicle axle mechanical sensing device

Technical field

The present invention relates to an electric vehicle axle sensing device, and more particularly to an electric vehicle axle mechanical sensing device capable of sensing the magnitude, rotational speed and rotational direction of an electric vehicle axle.

Background technique

Electric vehicle power control systems are widely used in the field of electric vehicles.

When the battery life of the electric vehicle is insufficient or people want to use the power of the electric vehicle to drive the wheel to drive the chain to exercise the body, it is necessary to sense the force of the shaft roller connected to the pedal of the electric vehicle through the torque sensor. And the rotational speed, that is, the strength and speed of the pedal of the electric vehicle, to adjust the output of the electric torque of the electric assist system of the electric vehicle. For example, when the user uses force and quickly pedals the pedal of the electric vehicle, the torque sensor senses the force and rotation speed of the shaft roller, and adjusts the torque output of the motor accordingly to meet the more comfortable riding. Line effect.

However, the torque assisting sensor in the prior art includes a measuring device such as a central axis torque sensor, which is complicated in structure, high in cost, and awkward in shape when collecting torque and speed signals, and the rear hook torque in the prior art. The versatility of the sensor is relatively poor, and it is necessary to change the structure of the existing frame, not to meet the versatility of the frame, and also affect the cost of the entire vehicle.

There is an urgent need to develop new electric vehicle axle mechanical sensing devices to solve the above problems.

Utility model content

One of the objects of the present invention is to provide an electric vehicle with a simple structure and easy assembly. Axis mechanical sensing system.

Another object of the present invention is to provide an electric vehicle axle mechanical sensing system capable of accurately sensing the force of an electric vehicle axle.

Another object of the present invention is to provide an electric vehicle axle mechanical sensing device that has excellent versatility without changing the existing vehicle structure.

In order to achieve the above object, an electric vehicle axle mechanical sensing device provided by the present invention includes a shaft roller, a bearing, a sleeve, and a bearing bowl; the bearing is sleeved on the shaft roller; the sleeve is sleeved in the a first end of the sleeve and sleeved on the bearing; the bearing bowl is sleeved on the first end of the sleeve; the first end of the sleeve includes at least one elastic Deformation unit

Preferably, the sleeve, the first end of the sleeve, and the elastic deformation unit are integrally formed structures.

Preferably, the elastic deformation unit is provided with a single hole at a position adjacent to the barrel of the sleeve.

Preferably, the first end of the sleeve has a circular cross section, and the elastic deformation unit is disposed on the ring and includes two inner wall default portions, an inner wall protrusion and an outer wall default portion. The two inner wall default portions are disposed on both sides of the inner wall projection; preferably, the two inner wall default portions are symmetrically distributed with respect to the inner wall projection.

Preferably, the electric vehicle axle mechanical sensing device of the present invention further includes a deformation sensing sensor, the deformation sensing sensor being disposed between the elastic deformation unit and the bearing or the elastic deformation unit and the bearing bowl between.

Preferably, the deformation sensing sensor is a strain gauge.

Preferably, the inner wall or the outer wall of the elastic deformation unit of the electric vehicle axle mechanical sensing device of the present invention is provided with a card slot, and the strain gauge is placed in the card slot.

Preferably, a displacement sensor is disposed between the elastic deformation unit and the barrel of the sleeve to sense a relative displacement of the elastic deformation unit relative to the sleeve barrel in a centrifugal direction.

Preferably, the displacement sensor comprises a magnetic element and a Hall sensing unit, the magnetic element and the Hall sensing unit being respectively fixed at a fixed position relative to the barrel of the sleeve and relative to the elastic deformation unit a fixed position; that is, the magnetic element may be fixed at a fixed position relative to the barrel of the sleeve, or may be fixed at a fixed position relative to the elastic deformation unit; and the sense of Hall The measuring unit may be fixed at a fixed position relative to the elastic deformation unit, or may be fixed at a fixed position relative to the barrel of the sleeve; using the sensed magnetic element and the Hall sensing unit The relative displacement between the two is to sense the relative displacement of the elastic deformation unit relative to the sleeve body to determine the magnitude of the force applied by the shaft roller to the elastic deformation unit, that is, the magnitude of the force applied by the sensing force direction F.

Preferably, the electric vehicle axle mechanical sensing device of the present invention further includes a speed sensing portion, a speed sensing unit; the speed sensing portion is fixed on the shaft roller and rotates with the shaft roller; the speed sensing unit is fixed a position on the sleeve corresponding to the speed sensing portion.

Preferably, the speed sensing portion is a magnetic ring, the magnetic ring is sleeved on the shaft roller and rotates with the shaft roller, and the speed sensing unit is a Hall sensing unit.

The electric vehicle axle mechanical sensing device of the utility model has the advantages of compact structure and easy loading It can accurately sense the magnitude of the pedal force of the electric vehicle, and the utility model does not change the existing vehicle structure, has good versatility, and is suitable for mass production.

DRAWINGS

1A is an exploded view of a first embodiment of the electric vehicle axle mechanical sensing device of the present invention.

FIG. 1B is a schematic cross-sectional view showing the center of the elastic deformation unit 122 from the center of the shaft roller 10 in the first embodiment of the electric vehicle axle mechanical sensing device of the present invention.

FIG. 2 is a schematic view showing the structure of the sleeve 12 of the electric vehicle axle mechanical sensing device of the present invention.

3 is a cross-sectional view showing one end of the assembled embodiment of the electric vehicle axle mechanical sensing device of the present invention.

FIG. 4 is a schematic view showing another structure of the sleeve 12 of the electric vehicle axle mechanical sensing device of the present invention.

FIG. 5 is a schematic view showing the structure of a second embodiment of the electric vehicle axle mechanical sensing device of the present invention.

Fig. 6 is a structural schematic view showing a third embodiment of the electric vehicle axle mechanical sensing device of the present invention.

detailed description

Before explaining the technical solutions of the embodiments of the present invention in detail, the terms and terms involved are explained. It should be noted that in this specification, the names are the same or the label phase The same components represent similar or identical structures and are for illustrative purposes only.

1A is a structural view showing a first embodiment of an electric vehicle axle mechanical sensing device of the present invention. As shown in FIG. 1A, the electric vehicle axle mechanical sensing device of the present invention comprises a shaft roller 10, a bearing 11, a sleeve 12, and a bearing bowl 13; the bearing 11 is sleeved on the shaft roller 10; The sleeve 12 is sleeved on the shaft roller 10 and the first end portion 121 of the sleeve 12 is sleeved on the bearing 11; the bearing bowl 13 is sleeved on the first end portion 121 of the sleeve 12. The first end 121 of the sleeve 12 includes at least one elastic deformation unit 122.

Preferably, the sleeve 12, the first end portion 121 of the sleeve 12, and the elastic deformation unit 122 are integrally formed. The first end portion 121 of the sleeve 12 and the sleeve 12 and the elastic deformation unit 122 are disposed in an integrally formed structure, which is more convenient to assemble. In particular, the elastic deformation unit 122 of the present invention is disposed at the first end. In one direction of the portion 121 and sensing the force in this direction, the shaft roller 10 may be forced in a direction of 360 degrees around the axis, so the direction of the force is sensed to the shaft roller 10 to the elastic The direction of the deformation unit 122 is assembled in that direction to sense the amount of force in the direction of the sensing, which makes it more important to fit the elastic deformation unit 122 at the correct angle, and to adopt an integral molding. The structure facilitates assembly of the parts; in addition, the material cost and production assembly cost of the parts are also lower.

FIG. 1B is a schematic cross-sectional view showing the center of the elastic deformation unit 122 from the center of the shaft roller 10 in the first embodiment of the electric vehicle axle mechanical sensing device of the present invention. The direction from the central axis of the shaft roller 10 to the elastic deformation unit 122 is the direction in which the force sensing device of the present invention needs to measure the force, that is, the direction of the sensed force F, as shown in FIG. As shown in FIG. 1B, the sensed force direction F of the shaft roller 10 corresponding to the elastic deformation unit 122 is transmitted via the bearing 11 to the elastic deformation unit 122 on the first end portion 121 of the sleeve 12. As in the structure in the embodiment described later in the specification, the force sensing means may be provided on the elastic deformation unit 122 to sense the force of the shaft roller 10 in the direction of the sensed force F.

The electric vehicle axle mechanical sensing device of the utility model adopts the structure of pressure sensing and sleeve integration, has simple structure and is easy to assemble, and is suitable for mass production, and the utility model does not change the existing assembly of the electric vehicle axle assembly. Structure, highly versatile. In addition, the present invention adopts a structure in which the elastic deformation unit 122 and the sleeve 12 are integrated, and the force of the shaft roller 10 in the direction of the sensing force F is directly transmitted to the elastic deformation unit 122 on the sleeve 12 via the bearing 11, The force of the shaft roller 10 of the electric vehicle in the direction of the sensed force F can be accurately sensed without affecting the rotation of the shaft roller 10, and the pressure sensor unit is not additionally added.

It should be noted that the above figures and description are merely illustrative. Various modifications can be made by those skilled in the art. For example, as shown in FIG. 1A, the present invention includes two bearing bowls 13, two bearings 11. The number can be increased, or the bearing bowls 13 mounted at both ends of the shaft roller can adopt different shapes, which do not affect the implementation of the present invention.

FIG. 2 is a schematic view showing the structure of the sleeve 12 of the electric vehicle axle mechanical sensing device of the present invention. As shown in FIG. 2, the elastic deformation unit 122 is provided with a shape-shaped hole 123 at a position adjacent to the barrel of the sleeve 12.

As the structure described in the first embodiment, the utility model adopts a structure in which the sleeve 12, the sleeve end portion 121 and the elastic deformation unit 122 are integrally formed, and the elastic deformation unit 122 The deformation necessarily drives the deformation of other portions of the sleeve 12. Providing a strip-shaped hole 123 at a position where the elastic deformation unit 122 is adjacent to the barrel of the sleeve 12 can minimize the influence of the deformation of the elastic deformation unit 122 on the deformation of other portions of the sleeve 12, and increase the pressure sensing. Accuracy, in addition, can also increase the life of the sleeve 12.

3 is a cross-sectional view showing the assembled end of another embodiment of the electric vehicle axle mechanical sensing device of the present invention. As shown in FIG. 3, the first end portion 121 of the sleeve 12 of the present invention has a circular cross section, and the elastic deformation unit 122 is disposed on the ring and includes two inner wall default portions 125. An inner wall projection 126 and an outer wall default portion 124; the two inner default portions 125 are distributed on both sides of the inner projection 126. Preferably, the two inner wall default portions 125 are symmetrically distributed with respect to the inner wall projections 126.

As shown in Fig. 2, the force received by the shaft roller 10 in the sense force direction F pushes the bearing 11, and the bearing 11 pushes the inner wall projection 126, and the inner wall default portion 125 and the outer wall default portion. The presence of 124 causes the elastic deformation unit 122 to deform. As the structure described in the subsequent embodiment, a pressure sensor can be disposed between the inner wall of the bearing bowl 13 and the elastic deformation unit 122, and the force of the shaft roller 10 in the direction of the sensed force F is sensed. size. It should be noted that the elastic deformation unit 122 in this embodiment can perform various modifications. For example, the inner wall default portion 125 can be replaced only by a slit after cutting, so that the elastic deformation unit 122 and the bearing 11 generate a certain space. Just fine.

The structure of the elastic deformation unit 122 adopted by the utility model has a simple structure, is easy to assemble, and can accurately sense the pressure of the shaft roller 10.

2 shows the sleeve 12 of the electric vehicle axle mechanical sensing device of the present invention. Schematic. FIG. 4 is a schematic view showing another structure of the sleeve 12 of the electric vehicle axle mechanical sensing device of the present invention. As shown in FIG. 2 and FIG. 4 , the electric vehicle axle mechanical sensing device of the present invention may further include a deformation sensing sensor 20 disposed between the elastic deformation unit 122 and the bearing 10 or Between the elastic deformation unit 122 and the bearing bowl 13. Preferably, the deformation sensing sensor 20 is a strain gauge and is electrically connected to the sensing circuit 15 through a wire. In particular, the inner wall or the outer wall of the elastic deformation unit 122 is provided with a card slot 22, and the strain gauge is placed in the card slot 22. 2 shows a structure in which the card slot 22 is disposed on the outer wall of the elastic deformation unit 122. As shown in FIG. 2, the deformation sensing sensor 20 may be disposed in the card slot 22, in particular, when the deformation sensing sensor 20 is a The strain gauges may be fixed in the card slot 22 when the strain gauge is used. FIG. 4 shows the structure in which the card slot 22 is provided on the inner wall of the elastic deformation unit 122.

It should be noted that, in addition to the strain gauge, the deformation sensing sensor 20 may also select other sensors capable of sensing the deformation magnitude and converting into electrical signals, optical signals or magnetic signals. In addition, as shown in FIG. 1A , the deformation sensing sensor 20 needs to be electrically connected to the sensing circuit 15 , and the sensing circuit 15 can directly pass the electrical signal sensed by the deformation sensing sensor 20 through the signal line 16 . Output.

The utility model adopts a structure in which a deformation induction sensor is disposed between the elastic deformation unit 122 and the bearing 10 or between the elastic deformation unit 122 and the bearing bowl 13, in particular, a strain sensor is used as a deformation induction sensor. The structure is simple, the cost is also low, and the force of the shaft roller 10 can be accurately sensed.

FIG. 5 shows the second embodiment of the electric vehicle axle mechanical sensing device of the present invention. Schematic diagram of the structure of the embodiment. As shown in FIG. 5, a displacement sensor may be disposed between the elastic deformation unit 122 and the barrel of the sleeve 12 to sense that the elastic deformation unit 122 is sensed relative to the sleeve 12 barrel. The magnitude of the displacement in the direction of force F. The displacement sensor includes a magnetic element 36 and a Hall sensing unit 32, the magnetic element 36 and the Hall sensing unit 32 being respectively fixed to a fixed position relative to the barrel of the sleeve 12 and relative to the elasticity The fixed position of the deformation unit 122. That is, the magnetic member 36 may be fixed at a fixed position with respect to the barrel of the sleeve 12, or may be fixed at a fixed position with respect to the elastic deformation unit 122; and the Hall sensing The unit 32 can be fixed at a fixed position relative to the elastic deformation unit 122, or can be fixed at a fixed position relative to the barrel of the sleeve 12; using the sensed magnetic element 36 and Hall The relative displacement between the sensing units 32 senses the relative displacement of the elastic deformation unit 122 relative to the barrel of the sleeve 12. Thus, when the elastic deformation unit 122 is pushed by the bearing 11 and deformed to be relatively displaced with respect to other portions of the sleeve 12, the displacement signal can be sensed and converted by the magnetic element 36 and the Hall sensing unit 32. The electrical signals are processed by the sensing circuit 15 and output via signal lines 16 to other control units. As shown in FIG. 5, a card slot 35 and a card slot 34 may be formed on the elastic deformation unit 122 and the barrel of the sleeve 12, respectively, and the magnetic element 36 and the Hall sensing unit 32 are respectively placed. The sensing circuit 15 can be fixed in the fixing groove 18 of the barrel of the sleeve 12 by the fixing portion 31. It should be noted that the fixed position of the magnetic element 36 and the fixed position of the Hall sensing unit 32 may be reversed, for example, the magnetic element 36 is disposed on the elastic deformation unit 122 at the sleeve 12 A Hall sensing unit 32 is disposed on the barrel. Additionally, the magnetic element 36 can be a magnet or magnet or other Magnetic components.

The electric vehicle axle mechanical sensing device adopted by the utility model uses the displacement sensor to sense the relative displacement between the elastic deformation unit 122 and the barrel of the sleeve 12, and the sensing structure is simple and the sensing result is accurate. Sensing circuit and magnetic component are mature displacement sensing technology, which is used in the structure of the utility model, and has low cost and good reliability.

6 and 1B are schematic views showing the structure of a third embodiment of the electric vehicle axle mechanical sensing device of the present invention. As shown in FIG. 6 and FIG. 1B, the electric vehicle axle mechanical sensing device of the present invention further includes a speed sensing portion 14 and a speed sensing unit 19; the speed sensing portion 14 is fixed on the shaft roller 10 and is associated with the shaft. The roller 10 is rotated; the speed sensing unit 19 is fixed to a position on the sleeve 12 corresponding to the speed sensing portion 14. Preferably, the speed sensing portion 14 is a magnetic ring, the magnetic ring is sleeved on the shaft roller 10 and rotates with the shaft roller 10, and the speed sensing unit 19 is a Hall sensing unit. It should be noted that the speed sensing portion 14 may be a ferromagnetic magnetic member provided on the shaft roller 10 or a ferromagnetic substance integrally formed with the shaft roller 10, and rotated with the shaft roller 10.

In addition, as shown in FIG. 1A, FIG. 3 and FIG. 5, a snap groove 17 may be provided between the first end portion 121 of the sleeve 12 and the bearing bowl 13 such that the sleeve 12 and the bearing bowl 13 They are stuck to each other so that there is no relative rotation between the two.

After the speed sensing portion 14 and the speed sensing unit 19 are used, the present invention can sense the rotational speed and the rotational direction of the shaft roller while sensing the force of the shaft roller of the electric vehicle axle, and further According to the sensed force and the speed of rotation and the direction of rotation, and then quickly adjust the size of the electric power output, intelligent adjustment and safer electric assist riding can be achieved, which makes the user more intelligent. The way Use electric power.

While the present invention has been described in detail with reference to the preferred embodiments of the present invention, those skilled in the <RTIgt; Various changes and modifications may be made to the invention in form and detail, which are within the scope of the invention.

Claims

An electric vehicle axle mechanical sensing device, comprising: a shaft roller (10), a bearing (11), a sleeve (12), a bearing bowl (13); the bearing (11) is sleeved on the shaft a sleeve (10); the sleeve (12) is sleeved on the shaft roller (10) and a first end portion (121) of the sleeve (12) is sleeved on the bearing (11); The bearing bowl (13) is sleeved on the first end portion (121) of the sleeve (12); the first end portion (121) of the sleeve (12) includes at least one elastic deformation unit (122) .
The electric vehicle axle mechanical sensing device according to claim 1, wherein the sleeve (12), the first end portion (121) of the sleeve (12), and the elastic deformation unit (122) are integrally formed. structure.
The electric vehicle axle mechanical sensing device according to claim 1, wherein the elastic deformation unit (122) is provided with a single hole (123) at a position adjacent to the barrel of the sleeve (12).
The electric vehicle axle mechanical sensing device according to claim 1, wherein the first end portion (121) of the sleeve (12) has a circular cross section, and the elastic deformation unit (122) is disposed. On the ring and including two inner wall default portions (125), inner wall projections (126) and an outer wall default portion (124); the two inner wall default portions (125) are distributed in the Both sides of the inner wall projection (126).
The electric vehicle axle mechanical sensing device according to any one of claims 1 to 4, further comprising a deformation sensing sensor (20), wherein the deformation sensing sensor is disposed on the elastic deformation unit (122) Between the bearing (10) or the elastic deformation unit (122) and the bearing bowl (13).
The electric vehicle axle mechanical sensing device according to claim 5, wherein the deformation sensing sensor (20) is a strain gauge.
The electric vehicle axle mechanical sensing device according to claim 6, wherein the inner wall or the outer wall of the elastic deformation unit (122) is provided with a card slot (22), and the strain gauge is placed in the card slot (22). )Inside.
The electric vehicle axle mechanical sensing device according to any one of claims 1 to 4, wherein a mechanical deformation unit (122) is disposed between the elastic deformation unit (122) and the sleeve of the sleeve (12). A displacement sensor senses displacement of the elastic deformation unit (122) relative to the sleeve (12) in a direction of force.
The electric vehicle axle mechanical sensing device according to claim 8, wherein the displacement sensor comprises a magnetic element (36) and a Hall sensing unit (32), the magnetic element (36) and a Hall sense The measuring units (32) are respectively fixed to a fixed position with respect to the barrel of the sleeve (12) and a fixed position with respect to the elastic deformation unit (122).
The electric vehicle axle mechanical sensing device according to any one of claims 1 to 4, 6-7 or 9, further comprising a speed sensing portion (14), a speed sensing unit (19); The speed sensing portion (14) is fixed on the shaft roller (10) and rotates with the shaft roller (10); the speed sensing unit (19) is fixed on the sleeve (12) and the speed sensing The position corresponding to the ring (14).
The electric vehicle axle mechanical sensing device according to claim 10, wherein the speed sensing portion (14) is a magnetic ring, and the magnetic ring is sleeved on the shaft roller (10) and is associated with the shaft. The roller (10) rotates, and the speed sensing unit (19) is a Hall sensing unit.