A press tone wheel and the manufacturing method thereof

Abstract

The present invention relates to a press tone wheel and a method for manufacturing a press tone wheel, characterized in that an insertion hole is provided on the inner side and a plurality of windows, which are through holes, are formed along the circumferential direction in the main body; and the width of the bars provided between the windows is smaller than the width of the windows.

Description

Technology Field

[0001] The present invention relates to a press tone wheel and a method for manufacturing a press tone wheel, and more specifically, to a press tone wheel for a vehicle and a method for manufacturing a press tone wheel. Background Technology

[0002] A bearing is a component in a rotating device that rotatably supports a rotating element relative to a non-rotating element, and wheel bearings are used to rotatably mount and support a vehicle's wheels to the vehicle body.

[0003] As illustrated exemplarily in FIG. 1, this wheel bearing is configured to support the wheel mounted on the rotating element (10) rotatably with respect to the vehicle body by having a rolling element (40) between a rotating element, which is a wheel hub (10) and an inner ring (20) on which the wheel of the vehicle is mounted, and a non-rotating element (30) fixed to the vehicle body.

[0004] A wheel bearing for a vehicle is equipped with a wheel speed sensor (WSS) that measures the rotational speed of the wheel, and can be configured to operate a control device such as an ABS (Anti-Lock Brake System) using the rotational speed information measured through the wheel speed sensor.

[0005] Typically, a wheel speed sensor is configured to measure the rotational speed of a wheel by placing a sensor element adjacent to a tone wheel mounted on a rotating element that rotates together with the wheel, and detecting changes in the magnetic field generated by the rotation of the tone wheel through the sensor element.

[0006] As illustrated exemplarily in FIG. 1, the wheel speed sensor is configured to measure the rotational speed of a wheel by mounting a tone wheel (50) on one end of a rotating element and then positioning a sensor member (60) adjacent to the tone wheel (50) using a cap member or the like. The tone wheel (50) illustrated in FIG. 1 is cylindrical, and a plurality of windows, which are press-perforated holes along the circumferential direction, are provided in the cylindrical main body.

[0007] As shown in FIG. 2, the tone wheel (50) may be provided by being coupled to the flange (13) of the wheel hub (10). In FIG. 2, reference numeral 11 illustrates a bolt for coupling the wheel hub (10) to a vehicle wheel.

[0008] FIG. 3 is a plan view illustrating the tone wheel (50) shown in FIG. 2. The tone wheel (50) has an annular shape with an insertion hole (55) formed on the inner side, and a plurality of windows (59), which are press-perforated holes along the circumferential direction in the main body (51), are provided on the outer side of the insertion hole (55). The main body (51) is formed in an annular shape. A cylindrical extension (57) is provided in the insertion hole (55). In FIG. 3, reference numeral 52 is a virtual circle passing through the center of the window in the radial direction, and 53 is a bolt hole into which a bolt (11) is inserted.

[0009] In the enlarged view of FIG. 3, the reference numeral "A" indicates the width of the bars provided between the windows (59) measured on the virtual circle, and "B" indicates the width of the windows measured on the virtual circle.

[0010] FIG. 4 schematically illustrates the process of forming a window (59) provided in a tone wheel (50). A raw material (W) that becomes the tone wheel (50) is positioned between a first mold (UD) and a second mold (LD), and the first mold (UD) is pressed toward the second mold (LD) (in the direction of arrow "A" in FIG. 4) so ​​that the raw material (W) is perforated and press-processed to form a window (59). There was a problem in that a protruding portion (511) was formed at the edge of the window (59) of the tone wheel (50) by being pushed by the pressure of the first mold (UD). In particular, the problem of the protruding portion (511) became more severe as the width of the window (B) increased compared to the width (A) of the bars.

[0011] And when a tone wheel (50) with a sliding portion (511) formed thereon is mounted on a bearing, it causes a sensing error. Recently, there is a trend to sense not only the rotational speed but also the rotational direction by the rotation of the tone wheel (50) for automatic parking, etc. However, when a sliding portion (511) is formed as described above, it causes a rotational direction sensing error, especially at low speeds for automatic parking, etc. Prior art literature

[0012] Republic of Korea Publication No. 10-2020-0117332 Published Patent Application The problem to be solved

[0013] The present invention is proposed to solve the problems of the conventional technology described above, and aims to provide a press tone wheel and a method for manufacturing a press tone wheel that reduce sensing errors caused by the slippage by suppressing the occurrence of slippage in the press tone wheel during the process of forming a window by press punching. means of solving the problem

[0014] For the above purpose, the present invention relates to a press tone wheel characterized by having an insertion hole on the inner side and a plurality of windows forming through holes along the circumferential direction in the main body; wherein the width of the bars provided between the windows is smaller than the width of the windows.

[0015] In the above, the radial outer end and the inner end of the window are characterized by having window protrusions protruding in directions facing each other.

[0016] In the above, the windows are spaced apart along the circumferential direction and arranged radially on the main body; they are rectangular with rounded corners, and are characterized by having window protrusions at the center of the outer and inner ends.

[0017] In the above, the window protrusion is characterized by having rounded portions formed on both sides of the window protrusion at the portion where the outer end and the window protrusion are connected, and at the portion where the inner end and the window protrusion are connected.

[0018] In the above, the ratio of the width of the bars (A) and the width of the window (D) between the windows in a virtual circle passing through the center of the window in the radial direction is 1:1.5 to 2.

[0019] In the above, the diameter of the virtual circle is characterized to be in the range of 130 mm to 230 mm.

[0020] In addition, the present invention relates to a method for manufacturing a press tone wheel having an insertion hole on the inner side as described above and a plurality of windows forming through holes along the circumferential direction in the main body;

[0021] The step of forming the above window includes a window forming part forming step in which a plurality of window forming parts are formed, and a window forming step in which each window forming part is formed into a window;

[0022] In the above window forming part forming step, a plurality of dividing holes are drilled so as to provide dividing bars, and a window forming part is formed with dividing bars provided between the dividing holes;

[0023] A method for manufacturing a press tone wheel is provided, characterized in that in the window forming step, the dividing bars provided in each window forming part are removed so that the window forming part is formed into a window.

[0024] In the above, the window forming part is characterized by being formed with one or more divided bars and two or more divided holes.

[0025] In the above, the width of the dividing hole is characterized by being equal to or smaller than the width of the dividing bar provided between the dividing holes.

[0026] In the above, the width of the dividing hole is characterized by being smaller than the width of the bars provided between the window forming parts.

[0027] In the above, the window forming step is characterized in that a portion of the dividing bars provided in each window forming part is removed, and each window is provided with a window projection formed by the dividing bars remaining on the inner and outer sides in the radial direction.

[0028] In the above, the width of the bars provided between the windows is characterized by being smaller than the width of the windows.

[0029] In the above, the dividing holes are characterized by being formed in parallel.

[0030] In the above, the dividing hole is characterized by being formed as a rectangle having rounded portions at the corners. Effects of the invention

[0031] The press tone wheel and the method for manufacturing the press tone wheel according to the present invention suppress the occurrence of slippage during the process of press-perforating and forming a window, thereby preventing defects, and can prevent defects caused by radial processing errors during the window formation process. Brief explanation of the drawing

[0032] FIG. 1 is a cross-sectional view illustrating a wheel bearing, and FIG. 2 is a perspective view illustrating another example of a wheel bearing, and FIG. 3 is a plan view illustrating a tone wheel of the prior art provided in a wheel bearing, and FIG. 4 is a schematic cross-sectional view illustrating the window perforation process of a tone wheel, and FIG. 5 is a plan view illustrated to explain a method for manufacturing a press tone wheel according to the present invention, and FIG. 6 is a plan view of a press tone wheel manufactured by the method of manufacturing a press tone wheel according to the present invention, and Figure 7 is an enlarged view of section "A" of Figure 6. Specific details for implementing the invention

[0033] All technical and scientific terms used in the description of the present invention, unless otherwise defined, have the meaning generally understood by those skilled in the art to which the present disclosure pertains. All terms used in the present disclosure are selected for the purpose of further clarifying the present disclosure and are not selected to limit the scope of the rights under the present disclosure.

[0034] Expressions such as "comprising," "having," "having," etc. used in the description of the present invention should be understood as open-ended terms implying the possibility of including other embodiments, unless otherwise stated in the phrase or sentence containing such expressions.

[0035] Singular expressions used in the description of the present invention may include the meaning of the plural form unless otherwise stated, and this applies likewise to singular expressions described in the claims.

[0036] Where in the description of the present invention it is mentioned that a component is "connected" or "combined" to another component, it should be understood that the component can be directly connected or combined to the other component, or can be connected or combined through a new or different component.

[0037] The method for manufacturing a press tone wheel according to the present invention will be described in detail below with reference to the attached drawings.

[0038] FIG. 5 is a plan view illustrating a method for manufacturing a press tone wheel according to the present invention, FIG. 6 is a plan view of a press tone wheel manufactured by the method for manufacturing a press tone wheel according to the present invention, and FIG. 7 is an enlarged view of section "A" of FIG. 6.

[0040] In the following description, the horizontal and vertical directions in Fig. 6 are used as the radial directions, and the direction perpendicular to the ground is used as the axial direction.

[0042] As shown in FIGS. 6 and 7, the press tone wheel (100) manufactured by the press tone wheel manufacturing method according to the present invention is manufactured from a metal such as steel.

[0043] The above press tone wheel (100) comprises a main body (101) that is annular and has an insertion hole (105) formed on the inside, and a cylindrical extension (107) that extends axially into the insertion hole (105).

[0044] The main body (101) is formed in an annular shape. A plurality of windows (109) are formed in the main body (101) that penetrate axially along the circumferential direction, radially outward from the insertion hole (105). The windows (109) are arranged radially in the main body (101) at spaced intervals along the circumferential direction. The windows (109) are holes perforated by a press.

[0045] Each of the above-mentioned windows (109) is formed as a rectangle with four rounded corners. A window projection (1095) is formed on the radially inner and outer sides of each window (109) and protrudes radially. The window projection (1095) is formed facing the window (109) radially. The window projection (1095) is formed by protruding radially inward from the radially outer end (1097) of the window (109) and protruding radially outward from the radially inner end (1098). The window projection (1095) is formed at the circumferential center of the outer end (1097) and the inner end (1098) of the window (109). Round portions are formed on both sides of the window projection (1095) at the portion where the outer end (1097) and the window projection (1095) are connected, and at the portion where the inner end (1098) and the window projection (1095) are connected.

[0046] The above window protrusions (1095) may be formed in two or more places spaced apart from each other along the circumferential direction on the outer end (1097) and the inner end (1098).

[0047] In the main body (101), a bar (108) is provided between a plurality of windows (109) that are spaced apart along the circumferential direction. The bar (108) is provided between adjacent windows (109). The bar (108) is spaced apart along the circumferential direction in the main body (101). The bar (108) is formed such that the spacing between the windows (109) increases as it extends radially outward from adjacent windows (109).

[0048] In FIGS. 6 and 7, reference numeral 102 is a virtual circle passing through the center of the window (109) in a radial direction, and 103 is a bolt hole into which a bolt is inserted.

[0049] In the description of the present invention, a press tone wheel (100) having a window (109) formed in the annular main body (101) is illustrated, but the present invention can also be applied to a tone wheel having a window formed in the cylindrical part.

[0051] A method for manufacturing a press tone wheel according to the present invention comprises a window forming part forming step and a window forming step.

[0052] As illustrated in FIG. 5, in the window forming step, a tone wheel member (100') is manufactured in which a plurality of window forming parts (109') are formed in the annular main body (101) and penetrated in the axial direction, spaced apart along the circumferential direction.

[0053] The window forming part (109') is composed of one or more dividing bars (1093) and two or more dividing holes (1091). The window forming part (109') is formed by perforating a plurality of dividing holes (1091) so as to provide dividing bars (1093), and including dividing bars (1093) provided between the dividing holes (1091).

[0054] For example, the window forming part (109') may be composed of two dividing holes (1091) and dividing bars (1093) provided between the dividing holes (1091). The window forming part (109') may also be composed of three dividing holes (1091) and two dividing bars (1093) provided between the dividing holes (1091).

[0055] The above-mentioned dividing hole (1091) is formed as a rectangle having rounded corners. Two or more of the dividing holes (1091) forming the window forming part (109') are formed and are formed side by side. That is, the plurality of dividing holes (1091) forming the window forming part (109') are formed side by side, so that the width (C) of the dividing window bars (1093) extending radially between the dividing holes (1091) is constant.

[0056] The width (B) of the above-mentioned dividing hole (1091) is formed to be equal to or smaller than the width (C) of the dividing window bars provided between the dividing holes (1091).

[0057] A plurality of divided holes (1091) forming each window forming part (109') are formed by press processing using a first mold (UD) and a second mold (LD) as exemplarily illustrated in FIG. 4. Accordingly, by forming the width (B) of the divided hole as above to be equal to or smaller than the width (C) of the divided window bars, the occurrence of a sliding part (511) caused by press processing in the window forming part forming step, which is the divided hole (1091) forming step, is prevented or suppressed.

[0058] The width (B) of the above-mentioned dividing hole (1091) is formed to be smaller than the width (A) of the lattice (108) provided between adjacent window-forming parts (109'). The width (A) of the lattice formed between the above-mentioned window-forming parts (109') is formed to be smaller on the radially inner side and larger on the outer side.

[0059] When measured on the virtual circle (102) of FIG. 5, it is preferable that the width of the dividing hole (B) be formed smaller than the width of the bars (A) provided between the window forming parts (109'). By forming the width of the dividing hole (B) smaller than the width of the bars (A) as described above, the occurrence of a sliding part (511) caused by press processing during the process of forming the dividing hole (1091) is prevented or suppressed.

[0061] As illustrated in FIGS. 6 and 7, in the window forming step, the dividing bars (1093) forming each window forming part (109') formed in the tone wheel member (100') are removed and formed into a window (109).

[0062] In the above window forming step, at least a portion of the dividing bars (1093) is removed in the radial direction. In the above window forming step, as shown in FIG. 7, a portion of the dividing bars (1093) provided in each window forming part (109') is removed, so that each window (109) is provided with a window projection (1095) formed by the dividing bars (1093) remaining on the inner and outer sides in the radial direction.

[0063] In FIG. 7, the outer end of the window (109) shown by reference numeral 1097 is the outer end of the dividing hole (1091), and the inner end of the window (109) shown by reference numeral 1098 is the inner end of the dividing hole (1091).

[0064] The above window projection (1095) is formed by shearing the dividing bar (1093) from the inner and outer sides in the radial direction, and the inner and outer parts in the radial direction of the sheared dividing bar (1093) remain to form the window projection (1095) on each window (109).

[0065] It is preferable that the outer side of the above-mentioned split window bar (1093) be sheared at a position spaced inward from the outer end (1097) in the radial direction, and the inner side be sheared at a position spaced outward from the inner end (1098) in the radial direction.

[0066] As shown by the dotted line in FIG. 7, the dividing bar (1093) can be removed by shearing it in alignment with the outer end (1097) and inner end (1098) of the dividing hole (1091). However, if shearing occurs radially outward due to a processing error (e), shearing occurs at the E1 and E2 sections, and especially at the section marked E1, a processing defect may occur. The same applies when shearing occurs radially inward due to a processing error (e).

[0067] In the shearing process of the above-mentioned dividing bars (1093), if window protrusions (1095) are provided on the inner and outer sides in the radial direction as in the present invention, the dividing bars (1093) can be sheared even if a processing error occurs, thereby preventing defects.

[0068] As shown in FIG. 7, the width (A) of the bars (108) provided between the adjacent windows (109) on the virtual circle (102) is formed to be smaller than the width (D) of the windows (109). The width of the bars (108) is formed to be narrower radially inward from the center of the virtual circle (102) and wider as it goes radially outward.

[0069] In the above, it is preferable that the ratio of the bar width (A) and the window width (D) between the window (109) and the virtual circle (102) passing through the center of the window in the radial direction be in the range of 1:1.5 to 2. It is even more preferable for the press tone wheel (100) in which the diameter of the virtual circle (102) is in the range of 130 mm to 230 mm.

[0070] When the window width (D) is smaller than 1.5 times the width (A) of the bars, it is difficult to form the window (109) in the same way as the present invention described above, and since the window (109) must be manufactured in the same way as in the conventional method during the window formation process, there was a problem in that a sliding part was inevitably formed.

[0071] In addition, when the window width (D) is greater than twice the width of the bars (A), the relatively narrow bars (108) are supported between the wide windows (109), so the probability of an error in sensing occurring due to deformation of the windows (109) during the manufacturing process increases rapidly.

[0072] The ratio of the bar width (A) and the window width (D) as described above is particularly more preferable when the diameter of the virtual circle (102) is in the range of 130 mm to 230 mm. When the diameter of the virtual circle (102) is smaller than 130 mm, it can be manufactured in the same manner as in the past, and when it is larger than 230 mm, it is possible to form the window (109) in the same manner as in the present invention even if the window width (D) is smaller than 1.5 times the bar width (A).

[0074] The method for manufacturing a press tone wheel according to the present invention is manufactured by a window forming part forming step and a window forming step, such that in the window forming part forming step, the width of the dividing hole (B) forming the window forming part (109') is formed to be smaller than the width of the bars (A), thereby preventing or suppressing the formation of a sliding part (511) during the process of forming the dividing hole (1091).

[0075] In addition, a window forming part (109') consisting of a dividing hole (1091) provided between the dividing bars (1093) is formed first, and since the window (109) is formed after the window forming part (109') is formed, the occurrence of a sliding part (511) during the window (109) formation process is prevented or the formation of a sliding part (511) is suppressed, so the rotation direction of the press tone wheel (100) can be sensed even during low-speed driving. Explanation of the symbols

[0077] 100: Press tone wheel 101: Main body 102: Virtual circle 103: Bolt hole 105: Insertion hole 107: Extension part 108: Bars 109: Window

Claims

Claim 1 An insertion hole (105) is provided on the inner side, and a plurality of windows (109) that are through holes are formed along the circumferential direction in the main body (101), and a bar (108) is provided between the windows (109); at least one window projection (1095) protruding in a direction facing each other is provided at the radial outer end (1097) and the inner end (1098) of the window (109); and the window projection (1095) A press tone wheel (100) characterized by being formed by removing a portion of a divided bar (1093) provided between two or more divided holes (1091) that become a window (109) and have a width (B) smaller than the width (A) of the bar (108). Claim 2 A press tone wheel (100) according to claim 1, characterized in that the width (A) of the bars (108) provided between the windows (109) is smaller than the window width (D). Claim 3 In claim 1, the window (109) is spaced apart along the circumferential direction and arranged radially on the main body (101); it is a rectangular shape having rounded corners, and is characterized by having a window projection (1095) at the center of the outer end (1097) and the inner end (1098), in a press tone wheel (100). Claim 4 A press tone wheel (100) characterized in that, in claim 1, round portions are formed on both sides of the window protrusion (1095) at the portion where the outer end (1097) and the window protrusion (1095) are connected, and at the portion where the inner end (1098) and the window protrusion (1095) are connected. Claim 5 A press tone wheel (100) characterized in that, in claim 2, the ratio of the bar width (A) and the window width (D) between the window (109) and the virtual circle (102) passing through the center of the window in the radial direction is 1:1.5 to 2. Claim 6 A press tone wheel (100) characterized in that, in claim 5, the diameter of the virtual circle (102) is in the range of 130 mm to 230 mm. Claim 7 A method for manufacturing a press tone wheel (100) having an insertion hole (105) on the inner side and a plurality of windows (109) formed as through holes along the circumferential direction in the main body (101); wherein the step of forming the windows (109) includes a window forming part forming step in which a plurality of window forming parts (109') are formed, and a window forming step in which each window forming part (109') is formed as a window (109); wherein in the window forming part forming step, a plurality of dividing holes (1091) are drilled so as to be provided with dividing bars (1093), and a window forming part (109') is formed with dividing bars (1093) provided between the dividing holes (1091); wherein in the window forming step, the dividing bars (1093) provided in each window forming part (109') are removed so that the window forming part (109') is formed as a window (109), and the width (B) of the dividing hole (1091) A method for manufacturing a press tone wheel characterized by having a width (C) of the dividing bars provided between the dividing holes (1091) that is equal to or smaller than the width (C) of the dividing bars. Claim 8 A method for manufacturing a press tone wheel according to claim 7, wherein the window forming part (109') is formed with one or more divided bars (1093) and two or more divided holes (1091). Claim 9 delete Claim 10 A method for manufacturing a press tone wheel according to claim 7, wherein the width (B) of the split hole (1091) is smaller than the width (A) of the bars (108) provided between the window forming parts (109'). Claim 11 A method for manufacturing a press tone wheel according to claim 7, wherein in the window forming step, a portion of the dividing bars (1093) provided in each window forming part (109') is removed, and each window (109) is provided with a window projection (1095) formed by the dividing bars (1093) remaining on the inner and outer sides in the radial direction. Claim 12 A method for manufacturing a press tone wheel according to claim 7, wherein the width of the bars (A) provided between the windows (109) is smaller than the width of the windows (D). Claim 13 A method for manufacturing a press tone wheel according to claim 7, wherein the split holes (1091) are formed in parallel. Claim 14 A method for manufacturing a press tone wheel according to claim 7, wherein the split hole (1091) is formed as a rectangle having rounded portions at the corners.

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