KR102651798B1 - Stator holder - Google Patents

Abstract

The present invention includes a cylindrical shaft fixing part with at least one groove formed on the outer peripheral surface; and a stator fixing part disposed at one end of the shaft fixing part to cover the groove by an injection method, wherein the groove is formed in a semicircular arch shape. Accordingly, the slip torque of the stator holder can be improved.

Description

Stator holder

The present invention relates to a stator holder used in a torque sensor.

Generally, a steering device assisted by separate power is used as a device to ensure the stability of the steering of a vehicle.

Previously, such auxiliary steering devices were used as hydraulic devices, but recently, electric power steering systems (Electronic Power Steering System) with low power loss and excellent accuracy are used.

The electric power steering system (EPS) described above ensures turning stability and provides rapid restoration by driving the motor from the electronic control unit (ECU) according to the driving conditions detected by the vehicle speed sensor, angle sensor, and torque sensor. Enables drivers to drive safely.

However, in order for this power device to intervene in the force that operates the steering wheel, it is necessary to measure not only the torque or steering angle applied to the steering shaft, but also the steering angle speed.

Generally, an angle sensor is used to measure the rotation angle of the steering shaft, and a torque sensor is used to measure the steering torque, but recently, a torque angle sensor (TAS) that can detect torque and rotation angle with a single sensor has been developed. It is used a lot. However, the torque angle sensor that detects the steering angle or steering angle speed has a complicated manufacturing process and a high probability of failure or malfunction, so an index sensor type torque index sensor (TIS) is sometimes used.

Meanwhile, the stator holder commonly used in torque angle sensors (TAS) or torque index sensors (TIS) has a stator fixing part made of injection-molded synthetic resin such as non-magnetic plastic, and a shaft holder made of metal and having a certain strength. May include government. At this time, the stator fixing part and the shaft fixing part may be coupled to each other by injection. That is, the stator fixing part and the shaft fixing part can be coupled to each other by insert molding, which is one of the injection methods.

However, when the shaft fixing part rotates, a phenomenon occurs in which the shaft fixing part slips with the stator fixing part.

Additionally, because the stator fixture expands at high temperatures, there is a problem of weakening slip torque and causing clearance.

The technical problem to be achieved by the present invention is to solve the above-mentioned problems. When forming a groove in the shaft fixing part and forming the stator fixing part by injection method, the groove is filled with a synthetic resin material to increase the slip torque. A stator holder is provided.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the description below.

According to the embodiment, the above problem includes: a cylindrical shaft fixing part having at least one groove formed on the outer circumferential surface; and a stator fixing part disposed at one end of the shaft fixing part by an injection method to cover the groove, and the groove is achieved by a stator holder formed in a semicircular arch shape.

Preferably, the groove includes a semicircular portion formed with a predetermined radius r1 and an arch portion extending from an end of the semicircular portion, and the depth D1 of the groove may increase toward the semicircular portion.

Additionally, the semicircular portion may be disposed toward the circumferential direction.

In addition, the two grooves are arranged based on the center C of the shaft fixing part, and the semicircular part of one of the grooves is arranged clockwise and the semicircular part of the other groove is arranged counterclockwise. You can.

Meanwhile, the groove may be formed by cutting with an end mill.

According to the embodiment, the above problem includes: a cylindrical shaft fixing part formed with a first groove and a second groove disposed on the outer peripheral surface to be spaced apart from each other at a predetermined interval (d); and

The stator includes a stator fixing part disposed at one end of the shaft fixing part to cover the first groove and the second groove by an injection method, and the first groove and the second groove are formed in a semicircular arch shape. This is achieved by the holder.

Preferably, each of the first groove and the second groove includes a semicircular portion formed with a predetermined radius (r2) and an arch portion extending from an end of the semicircular portion, and the depth of the groove (D2) increases toward the semicircular portion. may increase.

Additionally, the semicircular portion may be disposed toward the circumferential direction, and the semicircular portion of the first groove may be disposed to face the semicircular portion of the second groove.

In addition, the first groove and the second groove may be further disposed on the outer peripheral surface of the shaft fixture so as to be symmetrical to each other with respect to the center C of the shaft fixture.

According to the embodiment, the above problem includes: a cylindrical shaft fixing part having a third groove formed on the outer circumferential surface; and a stator fixing part disposed at one end of the shaft fixing part to cover the third groove by an injection method, wherein the third groove is formed in a semicircular arch shape, and the groove has a predetermined radius (r3). It includes a semicircular portion formed and an arch portion extending from an end of the semicircular portion, and the semicircular portion is achieved by a stator holder disposed toward the axial direction.

Additionally, an end of the arch portion may be arranged to meet one edge of the shaft fixing portion.

Additionally, the third groove may be formed to a predetermined depth D3.

In addition, the outer peripheral surface of the shaft fixing part may further include a fourth groove disposed to be spaced apart from the third groove, and the fourth groove may be arranged so that the locking protrusion surface faces upward and downward.

At this time, the depth D4 of the fourth groove may increase toward the center.

The stator holder according to the embodiment having the above configuration forms grooves of various shapes on the shaft fixing part, and includes a stator fixing part formed by filling the groove with a synthetic resin material by injection to cover the groove, thereby increasing slip torque. You can do it.

1 is a perspective view showing a stator holder according to an embodiment;
2 and 3 are a perspective view and a side view showing the shaft fixing part of the stator holder according to an embodiment;
Figure 4 is a cross-sectional view showing line AA of Figure 3,
Figures 5 and 6 are a perspective view and a side view showing a shaft fixing part according to another embodiment;
Figure 7 is a cross-sectional view taken along line A1-A1 in Figure 6;
Figures 8 and 9 are a perspective view and a side view showing one side of the shaft fixing part according to another embodiment;
Figure 10 is a perspective view showing the other side of the shaft fixing part according to another embodiment;
Figure 11 is a cross-sectional view taken along line A2-A2 in Figure 8;
FIG. 12 is a cross-sectional view taken along line A3-A3 in FIG. 9.

Since the present invention can be subject to various changes and can have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms containing ordinal numbers, such as second, first, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component. The term and/or includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

In the description of the embodiment, in the case where one component is described as being formed “on or under” another component, (on or under) includes both components that are in direct contact with each other or one or more other components that are formed (indirectly) between the two components. Additionally, when expressed as 'on or under', it can include not only the upward direction but also the downward direction based on one component.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless clearly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the attached drawings, but identical or corresponding components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted.

A torque sensor (not shown) may be connected to the steering shaft of an electric steering device (not shown). And, the stator holder 1 according to the embodiment may be placed inside the torque sensor.

1 is a perspective view showing a stator holder according to an embodiment.

Referring to FIG. 1 , the stator holder may include cylindrical shaft fixing parts 100, 100a, and 100b and a stator fixing part 200.

The shaft fixing parts 100, 100a, and 100b may be arranged to be connected to the output shaft of an electric steering device (not shown).

As shown in FIG. 2, the stator fixing part 200 may be disposed at one end of the shaft fixing parts 100, 100a, and 100b by an insert injection method using synthetic resin such as resin. Additionally, a stator (not shown) may be placed in the stator fixing unit 200.

Hereinafter, for clarity, the direction of the line continuously passing through the center C of the shaft fixing portions 100, 100a, 100b will be referred to as the axial direction, and the direction perpendicular to the axial direction will be referred to as the radial direction.

Figures 2 and 3 are a perspective view and a side view showing the shaft fixing part of the stator holder according to an embodiment, and Figure 4 is a cross-sectional view taken along line A-A in Figure 3.

Looking at the shaft fixing part 100 according to the embodiment with reference to FIGS. 2 to 4, the shaft fixing part 100 has a main body 110 and at least one groove 120 formed on the outer peripheral surface of the main body 110. It can be included. At this time, the groove 120 may be arranged to be spaced apart from one edge of the main body 110.

The body 110 may be formed of a cylindrical metal material. Additionally, the output shaft may be connected to one side of the main body 110.

Referring to FIGS. 2 and 3 , when viewed in the radial direction, the groove 120 may be formed in a semicircular arch shape. Accordingly, a locking protrusion surface 130 may be formed in the groove 120.

As a portion of the stator fixing part 200 fills the groove 120 and hardens, the locking protrusion surface 130 may support one area of the stator fixing part 200. Accordingly, one area of the stator fixing part 200 disposed on the locking protrusion surface 130 and the groove 120 forms an anti-slip structure to prevent the shaft fixing part 100 from slipping.

As shown in FIG. 3, the groove 120 may include a semicircular portion 121 formed with a predetermined radius r1 and an arch portion 122 extending from an end of the semicircular portion 121.

And, as shown in FIG. 4, the groove 120 may be formed such that the depth D1 of the groove 120 increases toward the semicircular portion 121. Accordingly, as shown in FIG. 2, the stopping surface 130 may be formed. Accordingly, the stopping surface 130 has a height equal to the depth D1 of the groove 120.

At this time, the semicircular portion 121 may be disposed toward the circumferential direction. Accordingly, the shaft fixing part 100 can be prevented from slipping in the circumferential direction. As an example, slip is prevented in the circumferential direction by the semicircular portion 121, but it is not necessarily limited thereto. For example, since the locking protrusion surface 130 formed on the semicircular portion 121 is extended to the arch portion 122, the shaft fixing portion 100 can also be prevented from slipping in the axial direction.

Meanwhile, two grooves 120 may be arranged at 180-degree intervals in the main body 110.

As shown in FIG. 4, two grooves 120 may be arranged based on the center C of the shaft fixing part 100.

The semicircular part 121 of one of the grooves 120 is arranged in a clockwise (CW) direction, and the semicircular part 121 of the other groove 120 is arranged in a counterclockwise (CCW) direction. It can be. Accordingly, the shaft fixing part 100 can be prevented from slipping in any of the circumferential directions (CW, CCW).

Meanwhile, as an example, two grooves 120 are disposed in the main body 110, but the present invention is not necessarily limited thereto. For example, in consideration of slip prevention, two or more grooves 120 may be formed on the outer peripheral surface of the shaft fixing part 100.

Meanwhile, the groove 120 of the shaft fixing part 100 may be formed by an end mill (not shown).

Figures 5 and 6 are a perspective view and a side view showing a shaft fixing part according to another embodiment, and Figure 7 is a cross-sectional view taken along line A1-A1 in Figure 6.

Hereinafter, the shaft fixing part 100a according to another embodiment will be looked at with reference to FIGS. 5 to 7. However, in describing the shaft fixing unit 100a, components identical to those of the shaft fixing unit 100 described above are denoted by the same reference numerals, and thus description thereof will be omitted.

The shaft fixing part 100a may include a main body 110 and a first groove 120a and a second groove 120b formed on the outer peripheral surface of the main body 110. Here, the first groove 120a and the second groove 120b may be arranged to be spaced apart from each other at a predetermined distance d.

Referring to FIGS. 5 and 6 , when viewed in the radial direction, each of the first groove 120a and the second groove 120b may be formed in a semicircular arch shape. Accordingly, a locking protrusion surface 130 may be formed in each of the first groove 120a and the second groove 120b.

As a portion of the stator fixture 200 is filled and hardened in each of the first groove 120a and the second groove 120b, the locking protrusion surface 130 may support one area of the stator fixture 200. . Accordingly, one area of the stator fixing part 200 disposed on the stopping surface 130 and each of the first groove 120a and the second groove 120b forms a slip prevention structure to prevent the shaft fixing part 100 from slipping. You can prevent it from happening.

As shown in FIG. 6, each of the first groove 120a and the second groove 120b includes a semicircular portion 121 formed with a predetermined radius r2 and an arch portion extending from the end of the semicircular portion 121 ( 122) may be included.

And, as shown in FIG. 6, each of the first grooves 120a and the second grooves 120b can be formed so that the depth D2 of the grooves 120a and 120b increases toward the semicircular portion 121. there is. Accordingly, as shown in FIG. 5, the stopping surface 130 may be formed. Accordingly, the stopping surface 130 has a height equal to the depth D2 of the grooves 120a and 120b.

At this time, the semicircular portion 121 may be disposed toward the circumferential direction, and the semicircular portion 121 of the first groove 120a may be disposed to face the semicircular portion 121 of the second groove 120b. Accordingly, the shaft fixing part 100 can be prevented from slipping in the circumferential direction.

The semicircular portion 121 of the first groove 120a may be disposed in a counterclockwise (CCW) direction, and the semicircular portion 121 of the second groove 120b may be disposed in a counterclockwise (CCW) direction. Accordingly, the shaft fixing part 100 can be prevented from slipping in any of the circumferential directions (CW, CCW). That is, the first groove 120a and the second groove 120b, in which the semicircular portion 121 is arranged to face each other, can prevent the shaft fixing portion 100 from slipping in the circumferential direction.

As an example, slip is prevented in the circumferential direction by the semicircular portion 121, but it is not necessarily limited thereto. For example, since the locking protrusion surface 130 formed on the semicircular portion 121 is extended to the arch portion 122, the shaft fixing portion 100 can also be prevented from slipping in the axial direction.

Meanwhile, a pair of first grooves 120a and second grooves 120b may be disposed at intervals of 180 degrees in the main body 110. That is, the first groove 120a and the second groove 120b may be further disposed on the outer peripheral surface of the shaft fixing part 100a so as to be symmetrical to each other with respect to the center C of the shaft fixing part 100a.

For example, as shown in FIG. 6, each of a pair of first grooves 120a and second grooves 120b may be disposed based on the center C of the shaft fixing part 100.

Meanwhile, the grooves 120a and 120b of the shaft fixing part 100 may be formed by an end mill (not shown).

Figures 8 and 9 are a perspective view and a side view showing one side of the shaft fixing part according to another embodiment, Figure 10 is a perspective view showing the other side of the shaft fixing part according to another embodiment, and Figure 11 is A2 in Figure 8 It is a cross-sectional view showing line A2, and FIG. 12 is a cross-sectional view showing line A3-A23 in FIG. 9.

Hereinafter, the shaft fixing part 100b according to another embodiment will be looked at with reference to FIGS. 8 to 12. However, in describing the shaft fixing unit 100b, the same components as the above-described shaft fixing units 100 and 100a are denoted by the same reference numerals, and thus description thereof will be omitted.

The shaft fixing part 100b may include a main body 110 and a third groove 120c formed on the outer peripheral surface of the main body 110. In addition, the shaft fixing part 100b may further include a fourth groove 120d spaced apart from the third groove 120c.

Referring to FIGS. 8 and 9 , when viewed in the radial direction, the third groove 120c may be formed in a semicircular arch shape. At this time, the third groove 120c may be formed to a predetermined depth D3.

Accordingly, a locking protrusion surface 130 may be formed in the third groove 120c. At this time, the stopping surface 130 has a height equal to the depth D3 of the third groove 120c.

As a portion of the stator fixing part 200 is filled and solidified in the third groove 120c, the locking protrusion surface 130 can support one area of the stator fixing part 200. Accordingly, one area of the stator fixing part 200 disposed on the stopping surface 130 and the third groove 120c forms a slip prevention structure to prevent the shaft fixing part 100b from slipping.

As shown in FIG. 9, the third groove 120c may include a semicircular portion 121 formed with a predetermined radius r2 and an arch portion 122 extending from an end of the semicircular portion 121. And, the semicircular portion 121 may be disposed toward the axial direction.

At this time, as shown in FIG. 9, the end of the arch part 122 may be arranged to meet one edge of the shaft fixing part 100b. In detail, the end of the arch portion 122 may be arranged to meet the lower edge of the main body 110.

Accordingly, the shaft fixing part 100b can be prevented from slipping in the circumferential direction and downward by the locking protrusion surface 130 of the third groove 120c.

Meanwhile, the fourth groove 120d may be formed 180 degrees apart from the third groove 120c based on the center C of the shaft fixing part 100.

Here, the fourth groove 120d can prevent the shaft fixing part 100b from slipping in the vertical direction.

The fourth groove 120d may be formed in a square shape when viewed in the radial direction. Additionally, the fourth groove 120d may be formed so that the depth D4 of the fourth groove 120d increases toward the center of the fourth groove 120d.

At this time, the stopping surfaces 130a and 130b may be arranged to face each other and be spaced apart from each other, as shown in FIG. 11 . And, the stopping surfaces 130a and 130b have a height equal to the depth D4 of the fourth groove 120d.

As a portion of the stator fixing part 200 is filled and solidified in the fourth groove 120d, the locking protrusion surface 130 can support one area of the stator fixing part 200. Accordingly, one area of the stator fixing part 200 disposed on the locking protrusion surface 130 and the fourth groove 120d forms a slip prevention structure to prevent the shaft fixing part 100b from slipping up and down. .

Although the present invention has been described above with reference to embodiments, those skilled in the art can make various modifications and modifications to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can change it. And, the differences related to these modifications and changes should be construed as being included in the scope of the present invention as defined in the appended claims.

1: Stator holder
100, 100a, 100b: Shaft fixing part
110: main body
120: groove 120a: first groove
120b: second groove 130c: third groove
130d: 4th groove
130, 130a, 130b: Locking jaw surface
200: Stator fixing part

Claims (14)

A cylindrical shaft fixing part with at least one groove formed on the outer peripheral surface; and
It includes a stator fixing part disposed at one end of the shaft fixing part to cover the groove by an injection method,
The groove includes a semicircular portion formed with a predetermined radius r1 and an arch portion extending from an end of the semicircular portion,
A stator holder in which the depth (D1) of the groove increases toward the semicircular portion. delete According to paragraph 1,
A stator holder in which the semicircular portion is disposed toward the circumferential direction. According to paragraph 3,
A stator holder in which two grooves are arranged based on the center (C) of the shaft fixing part, and the semicircular part of one of the grooves is arranged clockwise and the semicircular part of the other groove is arranged counterclockwise. . According to paragraph 1,
A stator holder in which the groove is formed by cutting with an end mill. A cylindrical shaft fixing portion formed with a first groove and a second groove disposed on the outer circumferential surface at a predetermined distance (d) apart from each other; and
A stator fixing part disposed at one end of the shaft fixing part to cover the first groove and the second groove by an injection method,
Each of the first groove and the second groove is,
It includes a semicircular portion formed with a predetermined radius (r2) and an arch portion extending from an end of the semicircular portion,
A stator holder in which the depth (D2) of the groove increases toward the semicircular portion. delete According to clause 6,
The semicircular portion is disposed toward the circumferential direction,
A stator holder in which a semicircular portion of the first groove is disposed to face a semicircular portion of the second groove. According to clause 8,
A stator holder in which the first groove and the second groove are further disposed on the outer peripheral surface of the shaft fixture to be symmetrical to each other with respect to the center (C) of the shaft fixture. A cylindrical shaft fixing part with a third groove formed on the outer peripheral surface; and
A stator fixing part disposed at one end of the shaft fixing part to cover the third groove by an injection method,
The third groove is formed in a semicircular arch shape,
The groove includes a semicircular portion formed with a predetermined radius r3 and an arch portion extending from an end of the semicircular portion,
The semicircular portion is disposed toward the axial direction,
A stator holder in which an end of the arch portion is disposed to meet one edge of the shaft fixing portion. delete A cylindrical shaft fixing part with a third groove formed on the outer peripheral surface; and
A stator fixing part disposed at one end of the shaft fixing part to cover the third groove by an injection method,
The third groove is formed in a semicircular arch shape,
The groove includes a semicircular portion formed with a predetermined radius r3 and an arch portion extending from an end of the semicircular portion,
The semicircular portion is disposed toward the axial direction,
A stator holder in which the third groove is formed at a predetermined depth (D3). A cylindrical shaft fixing part with a third groove formed on the outer peripheral surface; and
A stator fixing part disposed at one end of the shaft fixing part to cover the third groove by an injection method,
The third groove is formed in a semicircular arch shape,
The groove includes a semicircular portion formed with a predetermined radius r3 and an arch portion extending from an end of the semicircular portion,
The semicircular portion is disposed toward the axial direction,
It further includes a fourth groove disposed on the outer peripheral surface of the shaft fixing portion to be spaced apart from the third groove,
The fourth groove is a stator holder in which the locking jaw surfaces are arranged to face upward and downward. According to clause 13,
A stator holder in which the depth (D4) of the fourth groove increases toward the center of the fourth groove.

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