JP6806492B2 - Vehicle drum brakes - Google Patents

Description

The present invention relates to a vehicle drum brake, and more particularly to a vehicle drum brake having a configuration that suppresses deformation of the backing plate when the parking brake is operated.

A pair of brake shoes that are extensiblely arranged on the backing plate, a parking lever that is rotatably arranged around a predetermined mounting axis at one end of the pair of brake shoes, and a backing plate. A vehicle drum brake is known to include a parking brake cable that is introduced through a through hole and has one end connected to the tip of a parking lever, and an anchor that abuts the other ends of a pair of brake shoes. ing. For example, the vehicle drum brakes described in Patent Documents 1 to 3 are such.

Japanese Unexamined Patent Publication No. 2001-182762 Japanese Unexamined Patent Publication No. 2005-344833 Japanese Unexamined Patent Publication No. 9-303443

In vehicle drum brakes, for example, when the parking brake is activated, the deformation of the backing plate caused by the force that the tire tries to rotate, the so-called turning force, is received by the anchor via the brake shoe, especially the anchor fixing part. The deformation of the backing plate in is a problem. In the vehicle drum brakes of Patent Documents 1 to 3, for example, the reinforcing member is integrally molded with the backing plate and provided around the anchor fixing portion to ensure the rigidity of the backing plate without increasing the thickness of the backing plate. It has a structure that suppresses the deformation of the backing plate.

However, in a vehicle drum brake, since the hub and bearing of the axle pipe are attached to the central portion of the backing plate, it is necessary to secure the area required for attaching the hub and bearing on the backing plate. Further, in the drum brake for a vehicle, a parking brake cable for transmitting an operating force for operating the parking brake to the parking lever is provided, and a guide portion for guiding the parking brake cable is provided on the backing plate. Therefore, in order to ensure the rigidity of the backing plate, for example, when a reinforcing member is provided around the anchor fixing portion of the backing plate and a guide portion for guiding the parking brake cable is provided on the backing plate, the parking brake cable is provided. The guide portion is formed to have a slope that can be raised at a steep angle by drawing in a space-saving manner. As a result, it may be difficult to secure the rigidity of the backing plate due to the reduction in the thickness of the backing plate due to the space-saving drawing process and the start-up at a steep angle.

The present invention has been made in the background of the above circumstances, and an object of the present invention is to provide a guide portion for guiding the parking brake cable on the backing plate and to accompany the parking brake when the parking brake is activated. It is an object of the present invention to provide a drum brake for a vehicle that suppresses deformation of a backing plate caused by receiving a rotational force by an anchor via a brake shoe.

The gist of the first invention is (a) a pair of brake shoes extensiblely arranged on a backing plate and one end of the pair of brake shoes that can rotate around a predetermined mounting shaft. A parking brake cable that is introduced through a through hole formed in the backing plate and one end of which is connected to the tip of the parking lever, and the other end of the pair of brake shoes. A vehicle drum brake including anchors to be abutted with each other, which are (b) formed along the longitudinal direction of the parking brake cable and slidably guide the parking brake cable along the longitudinal direction. , A cable guide portion made of a cylindrical steel pipe , (c) a first fixing portion provided on one end side of the cable guide portion and fixed to the anchor, and (d) other than the cable guide portion. A cable guide member including a second fixing portion provided on the end side and fixed to a portion of the backing plate on which the through hole is formed is provided.

Further, the gist of the second invention is (a) a pair of brake shoes displaceable on the backing plate and one end of the pair of brake shoes that rotate around a predetermined mounting shaft. A movably arranged parking lever, a parking brake cable introduced through a through hole formed in the backing plate and one end connected to the tip of the parking lever, and the other end of the pair of brake shoes. A vehicle drum brake comprising anchors with which the portions are abutted, (b) formed along the longitudinal direction of the parking brake cable so that the parking brake cable is slidable along the longitudinal direction. A cable guide portion for guiding, (c) a first fixed portion provided on one end side of the cable guide portion and fixed to the anchor, and (d) provided on the other end side of the cable guide portion. A cable guide member including a second fixing portion fixed to a portion of the backing plate in which the through hole is formed is provided, and (e) a part of the backing plate is locally projected by drawing. The anchor fixing portion is formed, and (f) the anchor is fixed to the anchor fixing portion via the first fixing portion.

According to the first invention, the vehicle drum brake is formed of a cylindrical steel pipe formed along the longitudinal direction of the parking brake cable and slidably guiding the parking brake cable along the longitudinal direction. A cable guide portion, a first fixing portion provided on one end side of the cable guide portion and fixed to the anchor, and a through hole provided on the other end side of the cable guide portion and of the backing plate. A cable guide member including a second fixing portion fixed to the portion where the is formed is provided. As a result, the cable guide member of the vehicle drum brake has the first fixing portion for fixing one end of the cable guide portion that slidably guides the parking brake cable to the anchor, and the cable guide portion. Since the other end is fixed by the second fixing portion that is fixed to the portion of the backing plate where the through hole is formed, the rigidity of the backing plate is increased by the cable guide member. Therefore, it is possible to suppress the deformation of the backing plate caused by, for example, the turning force (rotational force) when the parking brake is operated is received by the anchor via the brake shoe.

According to the second invention, the vehicle drum brake is formed along the longitudinal direction of the parking brake cable, and has a cable guide portion that slidably guides the parking brake cable along the longitudinal direction, and the cable guide. A first fixing portion provided on one end side of the portion and fixed to the anchor, and a portion provided on the other end side of the cable guide portion and having the through hole formed in the backing plate. A cable guide member including a second fixing portion is provided, and an anchor fixing portion locally projected by drawing is formed on a part of the backing plate, and the anchor holds the first fixing portion. It is fixed to the anchor fixing portion via the anchor. As a result, the anchor fixing portion locally projected by drawing is formed so that the height of the ridge applied to the protrusion, that is, the drawing depth by drawing is reduced by the thickness of the first fixing portion. Has been done. Further, since the cable guide member having the cable guide portion is formed of a member different from the backing plate, the anchor fixing portion is formed without providing the cable guide portion. Therefore, the rising angle of the backing plate due to the drawing process for forming the anchor fixing portion can be made gentle, the formability of the backing plate is improved, and the stress concentration is relaxed. Since the rigidity can be increased, it is possible to suppress deformation of the backing plate caused by, for example, a turning force (rotational force) when the parking brake is activated, which is received by the anchor via the pair of brake shoes. it can.

It is a front view which shows the drum brake for a vehicle provided with the cable guide member of one Example to which this invention is applied. It is a figure which shows the main part of the anchor and the cable guide member in an enlarged manner, and is the II-II sectional view shown in FIG. It is an enlarged view which shows the cable guide member of one Example to which this invention is applied, and shows the front view of the cable guide member. It is an enlarged view which shows the cable guide member of one Example to which this invention is applied, and shows the side view of the cable guide member. It is a figure which shows the main part of the anchor and the cable guide member in an enlarged manner, and is the VV sectional view shown in FIG. It is an enlarged view which shows the main part of the anchor and the backing plate to which an anchor is fixed in the conventional drum brake for a vehicle. It is a figure which shows the cable guide member in another embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the following examples, the drawings are appropriately simplified or deformed, and the dimensional ratios and shapes of each part are not necessarily drawn accurately.

FIG. 1 is a front view showing a vehicle drum brake 10 according to an embodiment of the present invention, and shows a leading trailing type vehicle drum brake 10. The vehicle drum brake 10 includes, for example, a disk-shaped backing plate 16 integrally fixed to a non-rotating member such as an axle pipe, an axle housing, and a suspension device of a vehicle (not shown). Further, the vehicle drum brake 10 is arranged on the left and right outer peripheral portions of the backing plate 16 in a posture in which the convex side of the arc shape is on the outside so as to be close to and separated from each other in substantially contrast with the center line C1 of the backing plate 16. A pair of brake shoes 20 and 22 provided and provided on the backing plate 16 so as to be expandable are provided. Further, the vehicle drum brake 10 has a wheel cylinder 26 arranged between one ends of the pair of brake shoes 20 and 22, that is, between the upper ends in FIG. 1, and between the one ends of the pair of brake shoes 20 and 22. A return spring 24, which is stretched on the wheel cylinder 26 and constantly urges one end of each of the pair of brake shoes 20 and 22 to come into contact with the wheel cylinder 26, and a pair of brake shoes 20 and 22. It is provided with a longitudinal plate-shaped strut 28 bridged between the one ends. Further, the vehicle drum brake 10 includes an anchor 30 provided at a fixed position by a rivet 32 between the other ends of the pair of brake shoes 20 and 22, that is, the lower ends of FIG. 1, and a pair of brake shoes 20 and 22. It is provided with a spring 32 that is stretched between the other ends and constantly brings the other ends of the pair of brake shoes 20 and 22 into contact with the anchor 30. The center line C1 is a line passing through the center in the longitudinal direction of the wheel cylinder 26, the center in the longitudinal direction of the anchor 30, and the center of the backing plate 16 in the front view of FIG. The arrow F shown in FIG. 1 indicates the rotation direction of a wheel (tire) (not shown) provided with the vehicle drum brake 10 during forward traveling, that is, the generation of a rotating force (rotational force) in a state where the parking brake is activated. It shows the direction.

Each of the pair of brake shoes 20 and 22 has a flat plate shape substantially parallel to the plate surface of the backing plate 16, and the shoe webs 36 and 38 are entirely curved in an arc shape in the front view shown in FIG. The arc-shaped shoe rims 40 and 42 integrally fixed so that the cross sections of the brake shoes 20 and 22 form a substantially T-shape along the outer peripheral edge of the shoe webs 36 and 38 forming the arc shape. , The linings 44 and 46 made of a friction material integrally fixed to the outer peripheral surfaces of the shoe rims 40 and 42 with an adhesive or the like are provided, respectively.

The pair of brake shoes 20 and 22 are pressed toward the backing plate 16 side by the shoe holddown devices 48 and 50 arranged near the center of the shoe webs 36 and 38 in the longitudinal direction, and are backed so as to be expandable. It is arranged on the plate 16.

The base end of the flat plate-shaped parking lever 60 is rotatably connected to the one end of the brake shoe 20 by the mounting shaft 62 in a state where a part of the brake shoe 20 overlaps the backing plate 16 side in a front view. Has been done. One end of the parking brake cable 66 is connected to the tip of the parking lever 60.

The parking brake cable 66 transmits to the parking lever 60 an operating force, that is, a tension generated by operating a parking brake operating device (not shown) such as a parking brake pedal or a parking brake lever. That is, the state in which the parking brake is activated means a state in which an operating force is applied to the parking lever 60 via the parking brake cable 66 by operating a parking brake operating device (not shown). Specifically, the state in which the parking brake is activated means that the operating force of the brake operating device is transmitted to the parking lever 60 via the parking brake cable 66, so that the tip of the parking lever 60 is a backing plate. The one end portion of the brake shoe 20 is moved to the outer peripheral side via the mounting shaft 62 by being rotated toward the center side of 16, and at the same time, the one end portion of the brake shoe 20 and the one end portion of the brake shoe 22. By being pushed by the strut 28 hung between them and moving the brake shoe 20 to the outer peripheral side, one end of the brake shoe 20 and the brake shoe 22 is expanded to reach the outer peripheral surfaces of the shoe rims 40 and 42. A braking state in which the fixed linings 44, 46 are brought into contact with a rotating drum (not shown).

FIG. 2 is an enlarged view showing a main part of the anchor 30 and the backing plate 16 to which the anchor 30 is fixed, and is a sectional view taken along line II-II shown in FIG. As shown in FIG. 2, the backing plate 16 is formed with an anchor fixing portion 16a in which a part of the backing plate 16 is locally projected. The anchor fixing portion 16a is formed into a locally flat surface parallel to the backing plate 16 by, for example, drawing. The anchor 30 and the cable guide member 70 are fixed to the anchor fixing portion 16a with a plurality of (two in this embodiment) rivets 32. Specifically, the anchor 30 is fixed to the anchor fixing portion 16a with a plurality of rivets 32 via a first fixing portion 74 to be described later provided on the cable guide member 70. Further, as shown in FIG. 1, the anchor 30 is provided on both side surfaces 30a of the anchor 30 in front view from the other ends of the pair of brake shoes 20 and 22, specifically, the pair of brake shoes 20 and 22. The shoe webs 36 and 38 are fixed to the anchor fixing portion 16a so that the other ends of the shoe webs 36 and 38 are in contact with each other. Here, in a state where the anchor 30 is fixed to the anchor fixing portion 16a, as shown in FIG. 2, the height positions of the shoe webs 36 and 38 and both sides of the anchor 30 to which the shoe webs 36 and 38 are brought into contact with each other, respectively. The anchor fixing portion 16a is raised so as to match the height position of the surface 30a.

The anchor fixing portion 16a is formed in a substantially trapezoidal cross section, and is formed so as to connect the base portions 16b and 16c, which are raised by a part of the backing plate 16 by drawing processing, and the base portion 16b and the base portion 16c. Moreover, it has a flat plate portion 16d formed in a flat plate shape substantially parallel to the surface direction of the backing plate 16. The base portion 16b shows a rising portion on the outer peripheral side of the backing plate 16. The angle θb shown in FIG. 2 indicates the rising angle θb with respect to the ridge of the base portion 16b. The base portion 16c shows a rising portion on the center side of the backing plate 16. The angle θc shown in FIG. 2 indicates the rising angle θc on the ridge of the base 16c. As shown in FIG. 2, the base portion 16c is formed with a relief portion 16e so as not to interfere with the cable guide member 70. The anchor 30 and the cable guide member 70 are fixed to the flat plate portion 16d with rivets 32.

3 and 4 are enlarged views of the cable guide member 70 of the embodiment to which the present invention is applied. FIG. 3 shows a front view of the cable guide member 70, and FIG. 4 shows a side view of the cable guide member 70. As shown in FIGS. 3 and 4, the cable guide member 70 is formed of a member separate from the backing plate 16, and is fixed to the cable guide portion 72 for guiding the parking brake cable 66 and the anchor 30. A portion 74 and a second fixing portion 76 fixed to the backing plate 16 are included.

The cable guide portion 72 is formed along the longitudinal direction of the parking brake cable 66, and is formed so as to slidably guide the parking brake cable 66 along the longitudinal direction. The cable guide portion 72 is composed of a cylindrical steel pipe having an inner diameter sufficiently larger than the diameter of the parking brake cable 66. The parking brake cable 66 is slidably guided inside the cylinder of the cable guide portion 72. For example, when the operating force of a brake operating device (not shown) is applied to the parking brake cable 66, the cable guide portion 72 attaches one end of the parking brake cable 66 connected to the tip of the parking lever 60 to the backing plate 16 and the flat plate portion. The height of the cable guide portion 72 from the backing plate 16 is set so as to guide the cable guide portion 72 in a state substantially parallel to 16d. The first fixing portion 74 is provided on one end side of the cable guide portion 72. The first fixing portion 74 is formed of a plate-shaped member, and as shown in FIG. 3, in a plan view, a pair of insertion holes 74a through which a pair of rivets 32 are inserted are formed in a longitudinal shape. Approximately L from the anchor side portion 74b and the cable guide side portion 74c extending from one end of the anchor side portion 74b in a direction perpendicular to the longitudinal direction of the anchor side portion 74b to support one end of the cable guide portion 72. It is formed in a character shape. The cable guide portion side portion 74c of the first fixing portion 74 is curved along the outer peripheral surface of the cable guide portion 72 formed in a cylindrical shape as shown in FIG. 4, for example, the cable guide portion is welded. It is fixed to the outer peripheral surface on the one end side of 72. The second fixing portion 76 is provided on the other end side of the cable guide portion 72. As shown in FIGS. 3 and 4, the second fixing portion 76 is composed of a longitudinal plate-shaped member, and the cable guide portion 72 is penetrated in the plate thickness direction substantially in the center in the longitudinal direction. The second fixing portion 76 is fixed to the other end of the cable guide portion 72 by welding, for example. Further, the second fixing portion 76 is provided with an insertion hole 76a, and a fixing bolt (not shown) for fixing the cable guide member 70 to the backing plate 16 is inserted into the insertion hole 76a.

FIG. 5 is an enlarged view showing a main part of the anchor 30 and the cable guide member 70, and is a sectional view taken along line VV shown in FIG. As shown in FIG. 5, the parking brake cable 66 is guided by the cable guide portion 72 and introduced through the cable through hole 80 formed in the backing plate 16. The second fixing portion 76 fixedly fixed to the other end of the cable guide portion 72 is formed in a portion where the cable through hole 80 of the backing plate 16 is formed by a fixing bolt (not shown) through which the insertion hole 76a is inserted, that is, a base portion 16g described later. It is fixed. The cable through hole 80 is formed with a diameter larger than the diameter of the cable guide portion 72. As shown in FIG. 5, the protruding portion 16f is raised so that a part of the backing plate 16 protrudes in a cross section corresponding to two sides having a substantially triangular shape in a direction opposite to the rising direction of the anchor fixing portion 16a. The backing plate 16 has. The cable through hole 80 is formed in a locally flat base portion 16g located on the outer peripheral side of the backing plate 16 in the protruding portion 16f. As shown in FIG. 5, the cable guide 72 guides the parking brake cable 66 introduced through the through hole 80, and further attaches one end of the parking brake cable 66 to the tip of the parking lever 60 with a backing plate 16 and a flat plate. It is curved so as to guide the parking brake cable 66 in a state substantially parallel to the portion 16d.

FIG. 6 is an enlarged view showing a main part of the backing plate 104 to which the anchor 102 and the anchor 102 are fixed in the conventional drum brake 100 for a vehicle, and is a sectional view taken along the line shown in FIG. 2 in this embodiment. It corresponds. As shown in FIG. 6, in the conventional drum brake 100 for a vehicle, an anchor fixing portion 104a for fixing the anchor 102 is formed by raising a part of the backing plate 104. The anchor fixing portion 104a is formed by, for example, drawing. An anchor 102 is fixed to the anchor fixing portion 104a with a rivet 106.

As shown in FIG. 6, the anchor fixing portion 104a is formed in a substantially trapezoidal cross section, and connects the base portions 104b and 104c, which are raised by partially raising a part of the backing plate 104, and the base portion 104b and the base portion 104c. It has a flat plate portion 104d formed in such a manner and formed in a flat plate shape substantially parallel to the surface direction of the backing plate 104. The base portion 104b shows a rising portion on the outer peripheral side of the backing plate 104. The angle θb0 shown in FIG. 6 indicates the rising angle θb0 with respect to the ridge of the base 104b. The base portion 104c shows a rising portion on the center side of the backing plate 104. The angle θc0 shown in FIG. 6 indicates the rising angle θc0 applied to the ridge of the base 104c. As shown in FIG. 6, the conventional drum brake 100 for a vehicle does not include the cable guide member 70, and has a cable guide portion 104e formed in a flat plate shape substantially parallel to the surface direction of the backing plate 104 as a base. The parking brake cable 108 is guided by forming the 104c. For example, when the parking brake is activated and the operating force of a brake operating device (not shown) is applied to the parking brake cable 108, the cable guide 104e backs one end of the parking brake cable 108 to the tip of a parking lever (not shown). The height of the cable guide portion 104e from the backing plate 104 is set so as to guide the plate 104 in a state substantially parallel to the anchor fixing portion 104a. Anchor 102 is directly fixed to the flat plate portion 104d with a rivet 106.

As shown in FIGS. 2 and 6, in this embodiment, it is necessary to form the flat cable guide portion 72 on the base portion 16c of the anchor fixing portion 16a by providing the cable guide member 70 on the vehicle drum brake 10. It is formed so that the height of the ridge of the anchor fixing portion 16a, that is, the drawing depth due to the drawing process is shallower than the drawing depth of the conventional anchor fixing portion 104a by the thickness of the cable guide member 70. Therefore, the rising angle θc of the base 16c formed on the vehicle drum brake 10 of the present embodiment is compared with the rising angle θc0 of the base 104c formed on the conventional vehicle drum brake 100. It has become gradual. By not forming the cable guide portion 72 on the anchor fixing portion 16a, the anchor fixing portion 16a can be formed by, for example, a simple drawing process, so that the formability of the backing plate 16 is improved. Further, the anchor fixing portion 16a is formed so that the drawing depth is shallow and the rising angle θc applied to the ridge of the base portion 16c is gentle, so that the drawing depth is deep and the angle θc is large and steep. The backing plate 16 is formed in a shape in which stress concentration is relaxed as compared with the case where the backing plate 16 is formed in an inclined manner.

As described above, the vehicle drum brake 10 of the present embodiment is formed along the longitudinal direction of the parking brake cable 66, and includes a cable guide portion 72 that slidably guides the parking brake cable 66 along the longitudinal direction. A first fixing portion 74 fixed to one end side of the cable guide portion 72 and fixed to the anchor 30 and fixed to the other end side of the cable guide portion 72 to form a through hole 80 of the backing plate 16. A cable guide member 70 including a second fixing portion 76 fixed to the portion is provided. As a result, the cable guide member 70 of the vehicle drum brake 10 has a first fixing portion 74 for fixing one end of the cable guide portion 72 that slidably guides the parking brake cable 66 to the anchor 30, and a cable guide portion 72. Since the other end is fixed by the second fixing portion 76 that fixes the other end to the portion where the through hole 80 of the backing plate 16 is formed, the rigidity of the backing plate 16 is increased by the cable guide member 70. Therefore, it is possible to suppress the deformation of the backing plate 16 caused by, for example, the turning force (rotational force) when the parking brake is operated is received by the anchor 30 via the pair of brake shoes 20 and 22.

Further, according to the vehicle drum brake 10 of the present embodiment, an anchor fixing portion 16a locally projected by drawing is formed on a part of the backing plate 16, and the anchor 30 is a first fixing portion. It is fixed to the anchor fixing portion 16a via 74. As a result, the anchor fixing portion 16a locally projected by drawing is formed so that the height of the ridge applied to the protrusion, that is, the drawing depth by drawing is reduced by the thickness of the first fixing portion 74. Has been done. Further, since the cable guide member 70 having the cable guide portion 72 is formed of a member different from the backing plate 16, the anchor fixing portion 16a is formed without providing the cable guide portion 72. Therefore, the rising angle θc of the base portion 16c due to the drawing process for forming the anchor fixing portion 16a can be made gentle, the formability of the backing plate 16 is improved, and the stress concentration is relaxed. Since the rigidity of the backing plate 16 can be increased, for example, the backing plate 16 generated when the parking brake is activated is received by the anchor 30 via the pair of brake shoes 20 and 22. Deformation can be suppressed.

Next, another embodiment of the present invention will be described. The same reference numerals are given to the parts common to those in the first embodiment, and the description thereof will be omitted.

FIG. 7 is a diagram showing a cable guide member 110 according to another embodiment of the present invention. In this embodiment, the cable guide member 110 is an integral part formed by bending one plate-shaped member by, for example, pressing. The cable guide member 110 includes a cable guide portion 112 that guides the parking brake cable 66, a first fixing portion 114 that is provided on one end side of the cable guide portion 112 and is fixed to the anchor 30, and a cable guide portion 112. It includes a second fixing portion 116 which is provided on the other end side and is fixed to the portion where the through hole 80 of the backing plate 16 is formed.

The cable guide portion 112 is formed along the longitudinal direction of the parking brake cable 66, and is formed so as to slidably guide the parking brake cable 66 along the longitudinal direction. The cable guide portion 112 is formed with a substantially U-shaped cross section except for a part. For example, when the operating force of a brake operating device (not shown) is applied to the parking brake cable 66, the cable guide portion 112 attaches one end of the parking brake cable 66 connected to the tip of the parking lever 60 to the backing plate 16 and the flat plate portion. The height of the cable guide portion 112 from the backing plate 16 is set so as to guide the cable in a state substantially parallel to 16d. The first fixing portion 114 is provided on one end side of the cable guide portion 112. The first fixing portion 114 is formed in a flat plate shape, and is provided with an insertion hole 114a through which the rivet 32 is inserted. The second fixing portion 116 is provided on the other end side of the cable guide portion 112. The second fixing portion 116 is formed by bending the facing surfaces forming the cable guide portion 112, respectively. The second fixing portion 116 is formed so as to abut each of the base portion 16g in which the cable through hole 80 is formed. Further, the second fixing portion 116 is provided with an insertion hole 116a, and a fixing bolt (not shown) for fixing the cable guide member 110 to the backing plate 16 is inserted into the insertion hole 116a.

As described above, according to the cable guide member 110 of the present embodiment, the cable guide portion 112 formed along the longitudinal direction of the parking brake cable 66 and slidably guides the parking brake cable 66 along the longitudinal direction. , A first fixing portion 114 fixed to one end side of the cable guide portion 112 and fixed to the anchor 30 and a through hole 80 fixed to the other end side of the cable guide portion 112 to form a through hole 80 of the backing plate 16. It is configured to include a second fixing portion 116 fixed to the portion. As a result, since the cable guide member 110 is formed by bending the plate-shaped member, the weight can be reduced, the first fixing portion 114 is fixed to the anchor 30, and the second fixing portion 116 is the backing plate. Since the rigidity of the backing plate 16 is increased by the cable guide member 70 fixed to the portion where the through hole 80 of the 16 is formed, the deformation of the backing plate 16 can be suppressed.

Although a preferred embodiment of the present invention has been described in detail with reference to the drawings, the present invention is not limited to this, and is also carried out in still another embodiment.

For example, in the above-described embodiment, the cable guide member 70 has the first fixing portion 74 and the second fixing portion 76 fixed to the cable guide portion 72 by welding, but the present invention is not limited to this, and for example, a fixing bolt is used. The first fixing portion 74 and the second fixing portion 76 may be fixed to the cable guide portion 72 by the fixing device used.

It should be noted that the above is only one embodiment, and other examples are not given one by one, but the present invention shall be carried out in a mode in which various changes and improvements are made based on the knowledge of those skilled in the art without departing from the spirit thereof. Can be done.

10: Vehicle drum brake 16: Backing plate 16a: Anchor fixing portions 20, 22: Brake shoes 30: Anchor 60: Parking lever 62: Mounting shaft 66: Parking brake cable 70: Cable guide member 72: Cable guide portion 74: No. 1 fixing part 76: 2nd fixing part 80: through hole

Claims (2)

A pair of brake shoes that can be expanded on the backing plate,
A parking lever rotatably arranged around a predetermined mounting shaft at one end of the pair of brake shoes.
A parking brake cable introduced through a through hole formed in the backing plate and having one end connected to the tip of the parking lever.
A vehicle drum brake including an anchor to which the other ends of the pair of brake shoes are in contact with each other.
A cable guide portion formed of a cylindrical steel pipe formed along the longitudinal direction of the parking brake cable and slidably guides the parking brake cable along the longitudinal direction.
A first fixing portion provided on one end side of the cable guide portion and fixed to the anchor,
A vehicle drum provided with a cable guide member provided on the other end side of the cable guide portion and fixed to a portion of the backing plate on which the through hole is formed, and a cable guide member including the second fixing portion. brake. A pair of brake shoes that can be expanded on the backing plate,
A parking lever rotatably arranged around a predetermined mounting shaft at one end of the pair of brake shoes.
A parking brake cable introduced through a through hole formed in the backing plate and having one end connected to the tip of the parking lever.
A vehicle drum brake including an anchor to which the other ends of the pair of brake shoes are in contact with each other.
A cable guide portion formed along the longitudinal direction of the parking brake cable and slidably guiding the parking brake cable along the longitudinal direction.
A first fixing portion provided on one end side of the cable guide portion and fixed to the anchor,
A cable guide member including a second fixing portion provided on the other end side of the cable guide portion and fixed to a portion of the backing plate on which the through hole is formed is provided.
An anchor fixing portion locally projected by drawing is formed on a part of the backing plate.
The anchor is fixed to the anchor fixing portion via the first fixing portion.
Drum brakes for vehicles that feature this .

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