JP5199004B2 - Pedal arm - Google Patents

Description

  The present invention relates to a pedal arm used for a brake pedal or a clutch pedal of an automobile.

  A pedal arm used for a brake pedal or a clutch pedal of an automobile uses, for example, a single thick plate material as disclosed in Patent Document 1 or a patent to ensure necessary and sufficient rigidity against depression. As can be seen in Document 2, a flange is provided on the peripheral edge of a slightly thin plate. In any case, since the plate material itself has no meaning unless it is rigid, a relatively thick plate material having a thickness of 4 mm to 8 mm has been used. In addition, a pedal arm was also seen in which a paired assembly element (hereinafter referred to as a pedal element) that was pressed was aligned in the middle, and the pedal element was joined and integrated at the periphery. This intermediate pedal arm has the advantage that the thickness of the plate material constituting the pedal element can be reduced to 1.0 mm to 2.3 mm.

Japanese Patent Laid-Open No. 2002-012133 JP 2000-079869 A

  The pedal arms disclosed in Patent Document 1 and Patent Document 2 have a simple configuration and are relatively easy to manufacture, but the plate material having a thickness of 4 mm to 8 mm brings about the following problems. That is, a thick plate has a problem of increasing the material cost and a problem of increasing the weight of the pedal arm. In particular, weight reduction is important from the viewpoint of exhaust gas regulations for the purpose of environmental protection, and is important. In this respect, the pedal arm configured by aligning the pedal elements in the middle has a thin plate thickness of the plate material of the pedal elements, so that the problem caused by the thick plate thickness is solved. However, welding and closing the upper end and the lower end in order to ensure the rigidity as a pedal arm increases the number of manufacturing steps and increases the manufacturing cost associated with welding. Therefore, in the pedal arm, it becomes a problem to secure necessary and sufficient rigidity while reducing the thickness of the plate material for the purpose of saving material and reducing weight. Therefore, in order to solve the above problems, the configuration of a pedal arm used for a brake pedal or a clutch pedal of an automobile was examined.

What has been developed as a result of the study is a pedal arm in which a pair of pedal elements are aligned in the middle, and the pedal elements are joined together at the peripheral edge, and the pedal element has one peripheral edge on the inner winding edge, A pedal arm integrated by clinching the other peripheral edge as an outer winding edge to form a clinch peripheral edge, and further crimping the clinch peripheral edge intermittently to form a number of crimping engagement parts , The caulking engagement part is a trapezoidal shape equal to the width of the clinch peripheral edge, with the two border edges formed between the parts that are not caulked and skewed, and the folded outer winding edge it characterized by peep the recessed end surface to the inner edge and profiling the outer edge parts. The present invention adopts a pedal arm having a middle structure and thins the plate material to be used (1.0 mm to 2.3 mm thick) while forming a crimping engagement portion to increase the rigidity of the clinch peripheral portion, Increase overall rigidity. In other words, the inner winding edge and the outer winding edge constituting the clinch peripheral edge are meshed with each other by the caulking engagement part to form a firmly integrated clinch peripheral part, and the cross-sectional shape is further complicated to make the clinch peripheral edge The rigidity of the part is increased.

  If the width of the clinch peripheral portion is sufficient, the caulking engagement portion can be formed by continuously crimping the clinch peripheral portion into a U-shaped cross section and extending in the extending direction of the clinch peripheral portion. . However, if a large number of crimping engagement portions are formed by intermittently crimping the clinching peripheral portion, sufficient rigidity of the clinching peripheral portion, and hence the necessary rigidity of the pedal arm can be secured. The interval between the crimping engagement portions may be appropriately determined depending on the required rigidity, the clinch peripheral portion, the shape of each crimping engagement portion, and the like.

  The caulking engagement portion has a shape equal to the width of the clinch peripheral edge, a structure in which the inner end edge of the folded outer winding edge portion and the copying outer edge can look into the concave end surface, a shape smaller than the width of the clinch peripheral edge, A configuration in which either one of the inner edge of the winding edge or the copying outer edge can look into the recessed end surface, and a shape smaller than the width of the clinch peripheral edge, both the inner edge of the folded outer winding edge and the copying outer edge A configuration in which the end face of the dent is not visible is conceivable. Here, the “inner edge” of the folded outer winding edge means the edge of the pedal element plate having the outer winding edge as the peripheral edge, and the “following outer edge” of the folded outer winding edge. The outer peripheral edge of the clinch peripheral part formed by folding the outer winding edge part, and the outermost shell tangent of a generally arc-shaped cross section, respectively.

  When the width of the clinch peripheral edge is narrow, the caulking engaging portion can cross the clinch peripheral edge and allow the inner end edge and the copying outer edge to have a concave end surface equal to the cross section of the caulking engaging portion deformed by caulking. A configuration is preferred. This caulking engagement portion forms two boundary edges with a portion that is not caulked. From this, a square caulking engagement portion in which two boundary edges are both straight and parallel is fundamental. However, from the viewpoint of increasing the rigidity of the clinch peripheral portion, a plan view trapezoidal shape or a plan view parallelogram shape in which the two boundary edges are inclined in the extending direction of the clinch peripheral portion is preferable. This caulking engagement portion can be used even if the width of the clinch peripheral portion is widened, but since the range of caulking processing becomes large, another configuration described later is preferable.

  In addition, when the width of the clinch peripheral edge is narrow, the caulking engagement portion has a shape smaller than the width of the clinch peripheral edge, and the recessed end surface can be seen through either the inner edge or the outer copying edge of the folded outer winding edge. It can also be configured. This caulking engagement portion has an outer shape surrounded by one boundary edge formed like a single stroke from the inner edge or the outer edge to be copied. From this, a caulking engagement portion in which a boundary edge portion reaching the copying outer edge is surrounded by a U-shaped boundary edge perpendicular to and parallel to the copying outer edge is basically used. However, from the viewpoint of increasing the rigidity of the clinch peripheral edge, like the above-mentioned caulking engagement part, the boundary edge portion that reaches the outer edge to be copied is surrounded by a V-shaped boundary edge that is inclined in the extending direction of the clinch peripheral edge. It is preferable to use the engaging portion. This caulking engagement portion is easy to use because it does not need to increase the range of caulking processing even if the width of the clinch peripheral portion is widened.

  When the width of the clinch peripheral portion is widened, a configuration that is smaller than the width of the clinch peripheral portion and does not allow the recessed end surface to be seen through either the inner end edge or the copied outer edge of the folded outer winding edge portion is appropriate. This caulking engagement portion forms a closed boundary edge that does not intersect any of the inner end edge and the copying outer edge of the outer winding edge portion, and is basically a circular cross section or a polygonal shape. For example, a caulking engagement portion having a circular cross section is formed by forming a hole in a circular shape that does not penetrate through the outer winding edge and the inner winding edge, and then crushing from the outside in the radial direction to the inside. The plate | board materials which comprise a peripheral part mesh | engage mutually, and raise the rigidity of a clinch peripheral part. The caulking engagement portion only needs to be formed within the range of the clinch peripheral portion, and may be formed by irregularly shifting in the width direction of the clinch peripheral portion, for example, in order to complicate the cross-sectional shape of the clinch peripheral portion.

  The pedal arm to which the present invention is applied can ensure necessary and sufficient rigidity while reducing the plate thickness for the purpose of saving materials and reducing weight. The fact that the plate thickness of the plate material can be reduced is an effect obtained by adopting a mid-ply structure that is configured by combining pedal elements that form a pair. And, it was possible to secure the necessary and sufficient rigidity in the pedal arm of the middle alignment structure by connecting the inner winding edge portion and the outer winding edge portion of the pedal element at the clinch peripheral portion formed by clinching, Furthermore, it is the effect by having formed the crimp engaging part in the said clinch peripheral part. In addition, the clinch peripheral edge portion that forms the caulking engagement portion suppresses the displacement of the inner winding edge portion and the outer winding edge portion and the opening of the outer winding edge portion, and stably holds the integration of the pedal elements. Bring.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. 1 is a perspective view showing a pedal arm 1 of a brake pedal to which the present invention is applied, FIG. 2 is a side view of the pedal arm 1 of this example, FIG. 3 is a front view of the pedal arm 1 of this example, and FIG. FIG. 5 is a plan view of the pedal arm 1 of the present example, FIG. 6 is a bottom view of the pedal arm 1 of the present example, and FIG. 7 is an enlarged end view of the AA portion in FIG. FIG. 8 is a partially enlarged view of the caulking engagement portion 21 as viewed from the side. This example is an example of the pedal arm 1 in which the paired left pedal element 14 and right pedal element 15 are aligned in the middle and joined together at their front and rear edges.

  1 to 6, the pedal arm 1 of the present example includes a left pedal element 14 having front and rear peripheral edges as inner winding edges 141, and front and rear peripheral edges 151 and outer winding edges 151, respectively. A plurality of crimping engagement portions 21 are formed at the clinch peripheral portion 2 in which the outer winding edge portion 151 is wound around the inner winding edge portion 141 and the pedal pad 13 is formed at the lower end. Is fixed by welding.

  The pedal arm 1 of the present example has an appearance in which the upper end and the lower end are opened and bent from the vicinity of the middle in the vertical direction to the front in the front-rear direction and to the right in the left-right direction. The rotating shaft 11 is formed of a metal pipe having a hole communicating with the left and right direction at the upper end of each of the left pedal element 14 and the right pedal element 15 and inserted through the hole and fixed by welding. In addition, a link shaft hole 12 is formed in the vicinity of the middle of each of the left pedal element 14 and the right pedal element 15 so that a link rod (not shown) for detecting the amount of rotation of the pedal arm 1 is mounted by opening a hole communicating in the left-right direction. Is provided.

  The left pedal element 14 and the right pedal element 15 are each formed from a 1.5 mm-thick metal plate (cold rolled steel plate or hot rolled steel plate) by progressive processing (forward feed processing). In the pedal arm 1 of the present invention, since the entire rigidity can be sufficiently secured by the clinch peripheral portion 2 provided with a number of crimping engagement portions 21, it does not matter whether the upper end and the lower end are open. For this reason, it is possible to manufacture the left pedal element 14 and the right pedal element 15 having a thin plate thickness by using progressive processing with low manufacturing cost and excellent productivity. Moreover, since an upper end and a lower end can be open | released, the advantage which is easy to discharge | emit excess is also acquired, applying a rust preventive coating to the inside.

  As shown in FIG. 7, the clinch peripheral edge 2 is connected to a flange-like inner winding edge 141 that is the peripheral edge of the left pedal element 14, and a flange-like outer winding edge 151 that is the peripheral edge of the right pedal element 15. Is formed by folding the outer winding edge portion 151 and sandwiching the inner winding edge portion 141. Then, the clinching peripheral edge portion 2 is crimped at equal intervals in the extending direction, and a large number of crimping engagement portions 21 are formed. The caulking engagement portion 21 is a recess pushed from the folded side of the outer winding edge portion 151 toward the inner winding edge portion 141, and the folded side of the outer winding edge portion 151 bites into the inner winding edge portion 141, The inner winding edge portion 141 and the outer winding edge portion 151 are engaged with each other firmly and firmly by engaging the inner winding edge portion 141 with the outer winding edge portion 151 before being turned back.

  In addition, as shown in FIG. 8, the crimping engagement portion 21 has two boundary edges 211 and 211 formed between the portions that have not been crimped and slanted in the shape of a letter C so that the clinch peripheral portion 2 The recessed end surface is looked into the inner end edge and the copied outer edge of the folded outer winding edge 151. As a result, when the caulking engagement portion 21 tries to shift along one boundary edge 211, the other boundary edge 211 can prevent the displacement, and the inner winding edge portion 141 and the outer winding edge portion 151 can be engaged. Can be stabilized. Thus, the caulking engagement portion 21 increases the rigidity of the clinch peripheral edge portion 2 by firmly engaging the inner winding edge portion 141 and the outer winding edge portion 151 with each other as described above, and the inner winding edge portion. The engagement of 141 and the outer winding edge 151 is maintained.

9 is a side view of a pedal arm 1 of another example of a brake pedal to which the present invention is applied , FIG. 10 is a front view of the pedal arm 1 of another example, FIG. 11 is an enlarged end view of a BB portion in FIG. Fig. 13 is a side view of a pedal arm 1 of still another example of the brake pedal to which the present invention is applied , Fig. 13 is a front view of the pedal arm 1 of yet another example, and Fig. 14 is an enlarged end view of the CC section in Fig. 12. is there. The pedal arm 1 of the present invention improves the rigidity of the pedal arm 1 as a whole by the clinch peripheral edge portion 2 subjected to crimping. Here, various forms of caulking are conceivable. In addition to the trapezoidal caulking engagement portion 21 described above, a notch-shaped caulking engagement portion 22 (FIGS. 9 to 11) and a circular caulking engagement portion 23. (FIGS. 12-14) can be used.

  As shown in FIGS. 9 to 11, for example, the caulking engagement portion 22 of another example is a recess pushed into the inner winding edge portion 141 from the folded side of the outer winding edge portion 151, and the outer winding edge portion. The folded back side of 151 is engaged with the side of the outer wound edge 151 before being folded together with the inner wound edge 141. The difference from the above example (see FIGS. 1 to 8) is that the boundary edge 221 formed between the parts not crimped allows the outer edge of the outer winding edge 151 to look into the recessed end face and the clinch periphery. It is in a point that is smaller than the width of the part 2.

  As a result, when the caulking engagement portion 21 tries to shift along any portion of the boundary edge 221, the other portion can prevent the shift, and the engagement between the inner winding edge portion 141 and the outer winding edge portion 151 can be prevented. Can be stabilized. In this way, the crimping engagement portion 22 of another example increases the rigidity of the clinch peripheral edge portion 2 by firmly engaging the inner winding edge portion 141 and the outer winding edge portion 151 with each other, and the inner winding edge portion 141 and The engagement of the outer winding edge 151 is maintained.

  Further, as shown in FIGS. 12 to 14, the caulking engagement portion 23 of another example is a hole that does not penetrate from the folded side of the outer winding edge 151 toward the inner winding edge 141, By crushing from the outer side toward the inner side in the radial direction, the folded side of the outer winding edge portion 151 is engaged with the inner winding edge portion 141 integrally with the side before the outer winding edge portion 151 is folded back. The difference from the above example (see FIG. 1 to FIG. 8) is that the boundary edge 231 formed between the parts not crimped is recessed in both the inner end edge of the outer winding edge portion 151 and the copying outer edge. It is in the point that it is a circular shape smaller than the width of the clinch peripheral part 2 so that the end face cannot be seen.

  Accordingly, the caulking engagement portion 21 is not displaced along any part of the boundary edge 221, and the engagement of the inner winding edge portion 141 and the outer winding edge portion 151 can be stabilized. In this way, the crimping engagement portion 23 of still another example increases the rigidity of the clinch peripheral edge portion 2 by firmly engaging the inner winding edge portion 141 and the outer winding edge portion 151 with each other, and the inner winding edge portion 141. And the engagement of the outer winding edge 151 is maintained.

It is a perspective view showing the pedal arm of the brake pedal to which the present invention is applied. It is a side view of the pedal arm of this example. It is a front view of the pedal arm of this example. It is a rear view of the pedal arm of this example. It is a top view of the pedal arm of this example. It is a bottom view of the pedal arm of this example. FIG. 3 is an enlarged end view taken along a line AA in FIG. 2. It is the elements on larger scale which looked at the caulking engagement part from the side. It is a side view of the pedal arm of the brake pedal of another example to which the present invention is applied. It is a front view of the pedal arm of another example. FIG. 10 is an enlarged end view of a BB portion in FIG. 9. It is a side view of the pedal arm of the brake pedal of another example to which the present invention is applied. It is a front view of another example pedal arm. FIG. 13 is an enlarged end view of a CC section in FIG. 12.

Explanation of symbols

1 Pedal arm
11 Rotating axis
12 Link shaft hole
13 Pedal pad
14 Left pedal element
15 Right pedal element 2 Clinch edge
21 Caulking engagement part
22 Caulking engagement part
23 Caulking engagement part

Claims (1)

In the pedal arm in which the pedal elements to be paired are aligned in the middle, and the pedal elements are joined and integrated at the periphery,
The pedal element is clinched by clinching with one peripheral edge as an inner winding edge and the other peripheral edge as an outer winding edge, and further, the clinch peripheral edge is intermittently crimped and crimped. It is integrated by forming many parts ,
The caulking engagement part is a trapezoidal shape equal to the width of the clinch peripheral edge with the two boundary edges formed between the parts that are not caulked and skewed, and the folded outer winding edge A pedal arm characterized in that the inner end edge and the outer outer edge of the section have a recessed end surface .

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