Pedal arm

Abstract

The present invention provides a pedal arm having an arm main body that shortens a U-shaped clip pin, which is a connecting portion of a push rod extending from the front, in the front-rear direction. The brake pedal (1) having the arm main body (11) with weld seams (116, 117) extending vertically on the front surface is characterized in that the U-shaped clip pin (31) of the push rod (3) is pivotally connected to the arm main body (11) across the front surface of the arm main body (11), and the weld seams are thinned or disappear within the range interfered by the swinging U-shaped clip pin (31).

Description

Technical Field

[0001] The present invention relates to a pedal arm for an automobile. Background Art

[0002] A pedal arm for an automobile includes an arm body. For example, the edges of folded metal plate elements are butt-joined on the front surface, or the edges of two metal plate elements are butt-joined on the front and rear surfaces, and the butt-joined portions are welded (Patent Document 1). In the arm body, a clevis of a push rod extending from a master cylinder is pivotally supported so as to be swingable across the front surface. Thus, the clevis swings across a weld extending vertically by using the swing of the arm body (see Patent Document 1, Figure 1 ).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent No. 4918620 Summary of the Invention

[0006] Technical Problem to be Solved by the Invention

[0007] In order to avoid interference with other components, it is desired that the clevis is shortened in the front-rear direction and does not protrude in the left-right direction. However, in order to avoid interference with the weld, the clevis that swings across the weld provided on the front surface of the arm body becomes longer in the front-rear direction. This is the same in the case of a structure in which the clevis is pivotally supported in a recess formed on the side surface of the arm body to suppress the protrusion of the clevis in the left-right direction. Thus, in order to shorten the clevis in the front-rear direction or prevent it from protruding in the left-right direction, the structure of the arm body has been studied.

[0008] Solution to Solve the Above Technical Problem

[0009] As a result of the study, a pedal arm has been developed, which is characterized in that, in a pedal arm having an arm body with a weld extending vertically on the front surface, a clevis of a push rod is pivotally supported on the arm body across the front surface of the arm body, and the weld is thinned or disappeared within the range where the swinging clevis interferes. The clevis pivotally supported on the arm body across the front surface of the arm body relatively swings with respect to the arm body by using the swing of the pedal arm. Within the range where the swinging clevis interferes, the weld is not welded or removed to thin it or make it disappear, thereby avoiding interference with the clevis.

[0010] In addition, it can be configured such that in the arm main body, the U-shaped clip pin of the push rod is pivotally connected to a recess formed on the side surface of the arm main body, and the weld is thinned or disappears within the range outside the upper step open end and the lower step open end formed on the front surface of the arm main body where the height difference between the side surface of the arm main body and the recess appears. The height difference between the side surface of the arm main body and the recess appears as the upper step open end and the lower step open end on the front surface of the arm main body. The weld disappears within the range from the position above the upper step open end to the position below the lower step open end, avoiding interference with the U-shaped clip pin.

[0011] Advantages of the Invention

[0012] In the pedal arm of the present invention, the weld is thinned or disappears within the range where it is interfered with by the swinging U-shaped clip pin, so that the U-shaped clip pin can be shortened in the front-rear direction corresponding to the thickness of the weld. In addition, when it is configured such that the weld is thinned or disappears within the range outside the upper step open end and the lower step open end formed on the front surface of the arm main body where the height difference between the side surface of the arm main body and the recess appears, while preventing the U-shaped clip pin from protruding in the left-right direction, the upper step open end and the lower step open end formed by the side surface of the arm main body and the recess are separated from the lower end of the upper side and the upper end of the lower side of the truncated weld, thereby being able to avoid stress concentration. Description of the Drawings

[0013] Figure 1 It is a side view of a brake pedal to which the present invention is applied. Detailed Embodiments

[0014] Hereinafter, embodiments of the present invention will be described with reference to the drawings. For example Figure 1 As shown, the present invention can be applied to a brake pedal 1 for an automobile. The brake pedal 1 in this example is configured to include: a hollow arm main body 11 obtained by rounding a single metal plate and welding the butt joints; and a pedal pad 12 mounted on the lower end of the arm main body. In a state where the arm main body 11 is elastically pressed in the reset direction ( Figure 1 the right direction in the figure), it is pivotally connected to the support bracket 2 by a swing shaft 111, and a push rod 3 extending from the front ( Figure 1 the left direction in the figure) is connected near the middle section.

[0015] The arm main body 11 uses the butt joint of the metal plate as the front surface and is welded by welds 116 and 117 extending vertically. In the arm main body 11 of this example, a pair of groove-shaped reinforcing ribs 112 are formed in a two-piece set in a left-right opposed relationship below the middle section ( Figure 1 the reinforcing rib 112 is the left one). The reinforcing rib 112 prevents deformation in the front-rear direction ( Figure 1 the left-right direction in the figure) and the left-right direction ( Figure 1The structure strength of the arm main body 11 that is bent in the direction orthogonal to the paper surface in [ ] is reduced, and the shape after bending is maintained. The cross-sectional shape and length of the reinforcing rib 112 are free.

[0016] The U-shaped clip pin 31 of the push rod 3 straddles the front surface of the arm main body 11 and is pivotally connected to the recess 113 formed on the side surface ( Figure 1 the front surface in [ ]) of the arm main body 11 through the connecting shaft 32. The recess 113 in this example is mountain-shaped in the side view state opening forward and is formed in pairs of left and right opposing relationships, two in a group ( Figure 1 the recess 113 is the left one). In the recess 113, an inclined height difference formed by the side surface of the arm main body 11 and the recess 113 appears on the front surface, and an upper step open end 114 and a lower step open end 115 that appear on the front surface of the arm main body 11 are formed.

[0017] When the pedal pad 12 is depressed and the arm main body 11 swings in the front-rear direction, while pushing and pulling the push rod 3, the U-shaped clip pin 31 swings within the range of the recess 113 (refer to Figure 1 the imaginary line in [ ]). The upper step open end and the lower step open end 114, 115 formed by the recess 113 limit the swinging range of the U-shaped clip pin 31. In addition, the lower side of the step of the recess extending from the lower step open end 114 has the function of allowing the U-shaped clip pin 31 of the removed connecting shaft 32 to hang on to prevent it from falling. Thus, the brake pedal 1 to which the present invention is applied at least pushes the push rod 3 when the pedal pad 12 is depressed to exert a braking effect.

[0018] The arm main body 11 to which the present invention is applied is joined at the butt joint that is continuous in the up-down direction on the front surface by an upper weld seam and a lower weld seam 116, 117 that are truncated within the range of the upper step open end and the lower step open end 114, 115 formed sandwiching the recess 113, and the weld seam becomes thinner or disappears within the range sandwiching the step open ends 114, 115. Thus, the weld seam disappears within the swinging range of the U-shaped clip pin 31, and the front-rear length of the U-shaped clip pin 31 can be shortened. In addition, since the U-shaped clip pin 31 is pivotally connected to the recess 113 of the arm main body 11, the amount extending from the arm main body 11 in the left-right direction is also small. In this way, the brake pedal 1 to which the present invention is applied can reduce the U-shaped clip pin 31.

[0019] In this example, the arm main body 11 separates the lower end of the upper weld 116 from the upper step open end 114 above, and separates the upper end of the lower weld 117 to below the lower step open end 115. Thus, it is possible to separate the stress concentration at the upper step open end and the lower step open ends 114 and 115 from the stress concentration at the upper and lower ends of the upper weld and the lower weld 116 and 117, and the durability of the arm main body 11 affected by the stress concentration can be improved. The distance between the upper step open end and the lower step open ends 114 and 115 and the upper and lower ends of the upper weld and the lower weld 116 and 117 may be several millimeters to several tens of millimeters.

[0020] Description of Reference Numerals

[0021] 1 Pedal arm

[0022] 11 Arm main body

[0023] 111 Swing shaft

[0024] 112 Reinforcing rib

[0025] 113 Recess

[0026] 114 Upper step open end

[0027] 115 Lower step open end

[0028] 116 Upper weld

[0029] 117 Lower weld

[0030] 12 Pedal pad

[0031] 2 Support frame

[0032] 3 Push rod

[0033] 31 U-shaped clip pin

[0034] 32 Connecting shaft.

Claims

1. A pedal arm, comprising an arm main body having a weld seam extending vertically on the front surface, characterized in that: In the arm main body, the U-shaped clamping pin of the push rod is pivotally connected across the front surface of the arm main body to a recess formed on the side surface of the arm main body. Within the range clamped by the upper step open end and the lower step open end formed by the height difference between the side surface of the arm main body and the recess appearing on the front surface of the arm main body, the weld seam is made thinner or disappears compared to the upper and lower weld seams truncated within the range clamped by the upper step open end and the lower step open end.

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