CN108884890B

CN108884890B - Cable guide and vehicle brake

Info

Publication number: CN108884890B
Application number: CN201780019945.XA
Authority: CN
Inventors: 清水贵之; 石丸善隆; 岩田明大; 森浩二; 新谷觉
Original assignee: Advics Co Ltd; Hosei Brake Industry Co Ltd
Current assignee: Advics Co Ltd; Hosei Brake Industry Co Ltd
Priority date: 2016-03-31
Filing date: 2017-03-15
Publication date: 2020-10-23
Anticipated expiration: 2037-03-15
Also published as: DE112017001664T8; WO2017169815A1; DE112017001664B4; JP6537468B2; CN108884890A; DE112017001664T5; JP2017180789A

Abstract

The invention provides a cable guide and a brake for a vehicle, for example, a cable guide and a brake for a vehicle which can easily suppress abrasion of the cable guide and the cable. The cable guide includes, for example: a first cover section which is configured to have a closed cross section, extends along the cable in a state of covering the cable, guides the cable to be slidable, and is configured to be a first lubricant accommodating section capable of accommodating lubricant between the cable and the first cover section; and a second cover portion that is configured to have a closed cross section, extends along the cable in a state of covering the cable, and is configured to form a second lubricant housing portion that is connected to the first lubricant housing portion and is capable of housing the lubricant between the cable and the second lubricant housing portion, the second cover portion being expanded and contracted in accordance with relative movement of the cable with respect to the first cover portion.

Description

Cable guide and vehicle brake

Technical Field

The invention relates to a cable guide and a brake for a vehicle.

Background

Conventionally, there is known a vehicle brake having a motion conversion mechanism for converting rotation of a motor into linear motion of a cable, and obtaining a braking state by rotating the motor and pulling the cable to move a brake shoe (for example, patent documents 1 and 2).

Patent document 1: japanese patent laid-open publication No. 2015-172385

Patent document 2: U.S. patent application publication No. 2013/0087418 specification

In such a vehicle brake, for example, the following may occur: the cable slides relative to the cable guide that guides the cable, whereby the cable guide, the cable wear. Therefore, one of the objects of the present invention is to obtain a cable guide and a brake for a vehicle, which are capable of easily suppressing abrasion of a cable.

Disclosure of Invention

A cable guide according to the present invention is a cable guide that houses and guides a cable, for example, the cable being interposed between a brake member and a drive mechanism, and the cable guiding device being configured to brake a wheel by pulling the brake member with power of the drive mechanism, the cable guide including: a first cover portion having a closed cross section, extending along the cable in a state of covering the cable, guiding the cable to be slidable, and forming a first lubricant accommodating portion capable of accommodating a lubricant between the first cover portion and the cable; and a second cover portion that is configured to have a closed cross section, extends along the cable in a state of covering the cable, and forms a second lubricant housing portion that is connected to the first lubricant housing portion and is capable of housing lubricant between the second cover portion and the cable, the second cover portion including a first fixing portion that is fixed to the first cover portion in a state in which lubricant does not leak from the first lubricant housing portion and the second lubricant housing portion, and a second fixing portion that is remote from the first cover portion and is fixed to the cable in a state in which lubricant does not leak from the second lubricant housing portion, the second cover portion being expanded and contracted in accordance with relative movement of the cable with respect to the first cover portion. This makes it easy to suppress wear of the cable guide and the cable, for example, by using the lubricant in the cable guide. In addition, since the generation of rust and abrasion powder in the cable guide and the mixing of rust and abrasion powder into the cable guide from the outside are suppressed, the stability and durability of the driving efficiency of the driving mechanism can be easily improved.

In the cable guide, for example, the first cover portion has two curved portions between both ends in the extending direction of the first cover portion. Thus, for example, compared to the case where one curved portion is provided in the first cover portion, the force applied to the sliding portion of the first cover portion that slides with respect to the cable is easily dispersed, and therefore, the durability of the first cover portion and the cable is easily improved. In addition, the first cover portion can be more easily manufactured than in the case where three or more curved portions are provided in the first cover portion.

In the cable guide, for example, the first cover section is formed of a non-stretchable member, and the second cover section is formed of a stretchable member that stretches and contracts in the extending direction of the cable.

In the cable guide, for example, the drive mechanism is fixed to a support member, and the first cover portion is fixed to the support member at least at both ends in an extending direction of the first cover portion.

In the cable guide, for example, the drive mechanism includes a housing provided with a hole portion, the first cover portion enters the hole portion, and a ring-shaped seal member interposed between the first cover portion and the housing enters the hole portion.

The cable guide includes, for example, a fixing portion connected to the first cover portion and protruding outside the first cover portion, the drive mechanism is fixed to a support member, the fixing portion has a surface overlapping a surface of the support member, and the first cover portion extends obliquely with respect to the surface of the fixing portion.

In addition, the vehicle brake of the present invention includes the cable guide; the above-mentioned brake member; the above-described drive mechanism; the above-mentioned cable; a support member that fixes the drive mechanism; a drive mechanism fixing portion that fixes the drive mechanism to the support member; and a cable guide fixing portion that is different from the drive mechanism fixing portion and fixes the cable guide to the support member. Thus, for example, when the drive mechanism is removed, the cable guide does not have to be removed from the support member, and therefore leakage of the lubricant is suppressed.

In addition, the vehicle brake of the present invention includes the cable guide; the above-mentioned brake member; the above-described drive mechanism; the above-mentioned cable; a support member that fixes the drive mechanism; and a common fixing portion that fixes the cable guide and the drive mechanism to the support member. Thus, for example, the common fixing portion is shared by the cable guide and the drive mechanism, and therefore, the structure of the vehicle brake can be simplified.

Drawings

Fig. 1 is a rear view exemplarily and schematically showing a brake for a vehicle of a first embodiment as viewed from the rear of the vehicle.

Fig. 2 is a side view exemplarily and schematically showing the vehicle brake of the first embodiment as viewed from the outside in the vehicle width direction.

Fig. 3 is a side view exemplarily and schematically showing the operation of the brake member of the first embodiment, and is a view in a non-braking state.

Fig. 4 is a side view exemplarily and schematically showing the operation of the brake member of the first embodiment, and is a view in a braking state.

Fig. 5 is a sectional view exemplarily and schematically showing the drive mechanism of the first embodiment, and is a view in a non-braking state.

Fig. 6 is a sectional view exemplarily and schematically showing the drive mechanism of the first embodiment, and is a view in a braking state.

Fig. 7 is a sectional view VII-VII of fig. 5.

Fig. 8 is a view exemplarily and schematically showing the drive mechanism and the cable guide of the first embodiment.

Fig. 9 is a diagram exemplarily and schematically showing the cable guide and the cable of the first embodiment.

Fig. 10 shows, by way of example and schematically, a cross-sectional view of a part of the cable guide of the first embodiment.

Fig. 11 is a view exemplarily and schematically showing a first cover part of the cable guide of the first embodiment.

Fig. 12 is a view exemplarily and schematically showing a first hood part of the cable guide of the first embodiment.

Fig. 13 is a sectional view exemplarily and schematically showing a second hood part of the cable guide of the first embodiment.

Fig. 14 is a view exemplarily and schematically showing a support member and a first cover part of the first embodiment.

Fig. 15 is a view of a part of the vehicle brake according to the first embodiment, including a fixed portion between the support member and the first cover portion.

Fig. 16 is a view showing a part of a cross section taken along line XVI-XVI in fig. 14.

Fig. 17 is a diagram exemplarily and schematically showing a cable guide and a cable of the second embodiment.

Fig. 18 is a sectional view exemplarily and schematically showing a driving mechanism of the second embodiment.

Fig. 19 is a view exemplarily and schematically showing a fixing part of the cable guide of the third embodiment.

Fig. 20 is a view exemplarily and schematically showing a first cover part of a cable guide of a fourth embodiment.

Fig. 21 is a view exemplarily and schematically showing a support member and a cable guide of a brake for a vehicle according to a fifth embodiment.

Fig. 22 is a diagram exemplarily and schematically showing a cable guide of a fifth embodiment.

Fig. 23 is a view exemplarily and schematically showing a first cover part of a cable guide of a fifth embodiment.

Fig. 24 is a view exemplarily and schematically showing a metal part of a cable guide of a fifth embodiment.

Fig. 25 is a view exemplarily and schematically showing a part of the first cover part of the cable guide of the sixth embodiment.

Fig. 26 is a view exemplarily and schematically showing a part of the first cover part of the cable guide of the seventh embodiment.

Detailed Description

Exemplary embodiments of the present invention are disclosed below. The structure of the embodiment described below, and the operation and the result (effect) of the structure are examples. The present invention can be realized by a configuration other than the configurations disclosed in the following embodiments. In addition, according to the present invention, at least one of various effects (including a derivative effect) obtained by the structure of the present invention can be obtained.

In addition, a plurality of embodiments described below include components having the same functions. The components having the same functions are denoted by common reference numerals, and redundant description may be omitted. In fig. 1 to 4, for convenience of explanation, the front in the vehicle longitudinal direction is indicated by an arrow X, the outer side in the vehicle width direction (the axle direction) is indicated by an arrow Y, and the upper side in the vehicle vertical direction is indicated by an arrow Z.

In the following, a case is described in which the brake device 2 as an example of the vehicle brake is applied to the left rear wheel (non-drive wheel), but the present invention can be similarly applied to other wheels.

(first embodiment)

< Structure of brake device >

As shown in fig. 1, the brake device 2 is housed inside a peripheral wall 1a of the cylindrical wheel 1. The brake device 2 is configured as a drum brake. That is, as shown in fig. 2, the brake device 2 includes arc-shaped brake shoes 3 on both front and rear sides. A cylindrical drum 4 (see fig. 3 and 4) is provided around the brake device 2. The drum 4 rotates integrally with the wheel 1 about a rotation center C in the vehicle width direction (Y direction). The brake device 2 moves the two brake shoes 3 so as to contact the inner circumferential surface 4a of the cylindrical drum 4. Thereby, the drum 4 and hence the wheel 1 is braked by friction between the brake shoe 3 and the drum 4. The brake shoe 3 is an example of a brake member.

The brake device 2 includes, as actuators for moving the brake shoes 3, wheel cylinders 51 (see fig. 2) operated by hydraulic pressure and a motor 120 (see fig. 5) operated by energization. The wheel cylinders 51 and the motor 120 can move the two brake shoes 3, respectively. The wheel cylinder 51 is used for braking during traveling, for example, and the motor 120 is used for braking during parking, for example. That is, the brake device 2 is an example of an electric parking brake. In addition, the motor 120 may also be used for braking during driving.

As shown in fig. 1 and 2, the brake device 2 includes a disc-shaped base plate 6. The floor panel 6 is disposed in a posture intersecting the vehicle width direction. That is, the floor panel 6 extends substantially in a direction intersecting the vehicle width direction, specifically, substantially in the orthogonal direction (XZ plane). As shown in fig. 1, the components of the brake device 2 are provided on both the outer side and the inner side of the floor panel 6 in the vehicle width direction. The base plate 6 directly or indirectly supports the structural components of the brake device 2. That is, the bottom plate 6 is an example of a support member. The floor panel 6 is connected to a connection member, not shown, connected to the vehicle body. The connecting member is, for example, a part of the suspension (e.g., an arm, a ring, a mounting member, etc.). The opening 6b provided in the bottom plate 6 shown in fig. 2 is used for coupling with the connection member. Furthermore, the brake device 2 can also be used for driving wheels. When the brake device 2 is used for a drive wheel, an axle, not shown, penetrates through the opening 6c provided in the bottom plate 6 shown in fig. 2. The bottom plate 6 is made of, for example, a metal material.

The wheel cylinders 51, the brake shoes 3, and the like shown in fig. 2 are disposed on the vehicle width direction outer side of the floor panel 6. The brake shoe 3 is movably supported by a base plate 6. In the present embodiment, as shown in fig. 3, for example, the lower end portion 3a of the brake shoe 3 is supported by the bottom plate 6 so as to be rotatable about the rotation center C1. The rotation center C1 is substantially parallel to the rotation center C of the wheel 1. The wheel cylinder 51 is supported by the upper end of the base plate 6. The wheel cylinder 51 has two movable portions (pistons), not shown, that can protrude in the vehicle front-rear direction (the left-right direction in fig. 2). The wheel cylinder 51 projects the two movable portions in accordance with the pressure. The two projecting movable portions press the upper end portions 3b of the brake shoes 3, respectively. By the protrusion of the two movable portions, the two brake shoes 3 rotate around the rotation center C1, respectively, and move so that the upper end portions 3b are apart from each other in the vehicle front-rear direction. Thereby, the two brake shoes 3 move radially outward of the rotation center C of the wheel 1. A band-shaped lining 31 along a cylindrical surface is provided on the outer periphery of each brake shoe 3. Thereby, the lining 31 is brought into contact with the inner circumferential surface 4a (see fig. 4) of the drum 4 by the movement of the two brake shoes 3 radially outward of the rotation center C. The drum 4 and hence the wheel 1 are braked by friction between the liner 31 and the inner peripheral surface 4 a. As shown in fig. 2, the brake device 2 includes a restoring member 32. When the operation of pressing the brake shoes 3 by the wheel cylinders 51 is released, the restoring member 32 moves the two brake shoes 3 from the position (braking position Pb, see fig. 4) in contact with the inner circumferential surface 4a of the drum 4 to the position (non-braking position Pn, initial position, see fig. 3) not in contact with the inner circumferential surface 4a of the drum 4. The restoring member 32 is an elastic member such as a coil spring, and applies a force to each brake shoe 3 in a direction to bring it closer to the other brake shoe 3, that is, in a direction to move it away from the inner circumferential surface 4a of the drum 4.

< Structure and action of moving mechanism >

The brake device 2 further includes a moving mechanism 8 (see fig. 3 and 4) for moving the two brake shoes 3 from the non-braking position Pn to the braking position Pb. The moving mechanism 8 is provided on the vehicle width direction outer side of the floor panel 6. As shown in fig. 2 to 4, the moving mechanism 8 includes a lever 81 (not shown in fig. 2), a cable 82, and a support 83. The lever 81 is provided so as to overlap the brake shoe 3L and the bottom plate 6 in the axial direction of the rotation center C of the wheel 1 between one of the two brake shoes 3, for example, the left brake shoe 3L in fig. 2 and the bottom plate 6. The lever 81 is supported by the brake shoe 3L so as to be rotatable about a rotation center C2. The rotation center C2 is located at an end of the brake shoe 3L on the side away from the rotation center C1 and on the upper side in fig. 3, and is substantially parallel to the rotation center C and the rotation center C1. The cable 82 is engaged with a lower end portion 81a of the lever 81 on the side away from the rotation center C2 by an engaging member 84. The cable 82 moves the lower end portion 81a of the lever 81 in the direction toward the other, e.g., the right brake shoe 3R in fig. 2. The cable 82 moves generally along the floor 6. The support post 83 is interposed between the lever 81 and another brake shoe 3R different from the brake shoe 3L supporting the lever 81, and is supported between the lever 81 and the other brake shoe 3R. In addition, a connection position P1 of the lever 81 and the stay 83 is set between the rotation center C2 and a connection position P2 between the cable 82 and the lever 81.

In the moving mechanism 8, when the cable 82 is pulled and moved to the right side in fig. 3 and 4, and the lever 81 is moved in a direction to approach the brake shoe 3R as shown in fig. 4 (arrow a), the lever 81 presses the brake shoe 3R via the support 83 (arrow b). Thereby, the brake shoe 3R rotates (arrow C) about the rotation center C1 from the non-braking position Pn (fig. 3) and moves to a position (braking position Pb, fig. 4) in contact with the inner circumferential surface 4a of the drum 4. In this state, the connection position P2 between the cable 82 and the lever 81 corresponds to a point of force, the rotation center C2 corresponds to a fulcrum, and the connection position P1 between the lever 81 and the support 8 corresponds to a point of action. Further, when the lever 81 is moved to the right side in fig. 3 and 4, that is, in a direction in which the brake shoe 3R is pressed against the support post 83 (arrow a) in a state in which the brake shoe 3R is in contact with the inner peripheral surface 4a, the lever is supported by the support post 83, and the brake shoe 3L is rotated counterclockwise in fig. 3 and 4 (arrow d) with the connecting position P1 with the support post 83 as a fulcrum. Thereby, the brake shoe 3L rotates about the rotation center C1 from the non-braking position Pn (fig. 3) and moves to a position (braking position Pb, fig. 4) in contact with the inner circumferential surface 4a of the drum 4. Thus, the

brake shoes

3L and 3R are moved from the non-braking position Pn to the braking position Pb by the operation of the moving mechanism 8. Further, in a state after the brake shoe 3R comes into contact with the inner circumferential surface 4a of the drum 4, a connection position P1 between the lever 81 and the support post 83 becomes a fulcrum. The amount of movement of the

brake shoes

3L and 3R is small, for example, 1mm or less.

The cable 82 is interposed between the brake shoe 3 and the driving mechanism 100, and pulls the brake shoe 3 by the power of the driving mechanism 100 to brake the wheel 1.

< driving mechanism >

The drive mechanism 100 shown in fig. 1, 2, 5, and 6 moves the two brake shoes 3 from the non-braking position Pn to the braking position Pb via the moving mechanism 8 (see fig. 3 and 4). As shown in fig. 1 and 2, the drive mechanism 100 is positioned on the vehicle width direction inner side of the floor panel 6 and is fixed to the floor panel 6. The cable 82 shown in fig. 2 to 5 penetrates the opening 6d provided in the bottom plate 6 (see fig. 5).

As shown in fig. 5, the drive mechanism 100 includes a housing 110, a motor 120, a speed reduction mechanism 130, and a motion conversion mechanism 140.

The housing 110 supports the motor 120, the speed reduction mechanism 130, and the motion conversion mechanism 140. The housing 110 may be configured to include a plurality of components. In this case, the plurality of components can be integrated by coupling with a not-shown coupling member such as a screw. The housing 110 is fixed to the base plate 6 by a fixing member 115 such as a screw (bolt). A housing chamber R surrounded by a wall 111 is provided in the case 110. The motor 120, the speed reduction mechanism 130, and the motion conversion mechanism 140 are housed in the housing chamber R and covered by the wall portion 111. The housing 110 may also be referred to as a base, support member, shell, or the like. Further, the structure of the housing 110 is not limited to the illustrated structure here. The fixing member 115 is also referred to as a coupling member. The fixing member 115 is an example of a fixing portion for a driving mechanism.

The motor 120 is an example of an actuator, and includes a case 121 and a housing member housed in the case 121. The housing member includes, for example, a stator, a rotor, a coil, a magnet (not shown), and the like in addition to the shaft 122. The shaft 122 protrudes from the case 121 in a direction D1 along the first rotational center Ax1 of the motor 120. The direction D1 is to the right in fig. 5. The motor 120 is driven by a driving power based on a control signal, and rotates the shaft 122. The shaft 122 may also be referred to as an output shaft.

The reduction mechanism 130 includes a plurality of gears rotatably supported by the housing 110. The plurality of gears are, for example, a first gear 131, a second gear 132, and a third gear 133. The reduction mechanism 130 may also be referred to as a rotation transmission mechanism.

The first gear 131 rotates integrally with the shaft 122 of the motor 120. The first gear 131 may also be referred to as a driving gear.

The second gear 132 rotates about a second rotational center Ax2 that is parallel to the first rotational center Ax 1. The second gear 132 includes an input gear 132a and an output gear 132 b. The input gear 132a meshes with the first gear 131. The input gear 132a has a larger number of teeth than the first gear 131. Thereby, the second gear 132 is decelerated to a lower rotation speed than the first gear 131. The output gear 132b is located in a direction opposite the direction D1 relative to the input gear 132 a. The second gear 132 may also be referred to as an idler gear.

The third gear 133 rotates about a third rotation center Ax3 parallel to the first rotation center Ax 1. The third gear 133 is engaged with the output gear 132b of the second gear 132. The third gear 133 has a larger number of teeth than the output gear 132 b. Thereby, the third gear 133 is decelerated to a lower rotation speed than the second gear 132. The third gear 133 may also be referred to as a driven gear. The structure of the speed reduction mechanism 130 is not limited to the structure illustrated here. The reduction mechanism 130 may be a rotation transmission mechanism other than a gear mechanism, such as a rotation transmission mechanism using a belt, a pulley, or the like, for example.

The motion conversion mechanism 140 has a rotating member 141 and a linear motion member 142.

The rotating member 141 rotates about the third rotation center Ax 3. The rotating member 141 has a small diameter portion 141a and a large diameter portion 141b having a larger outer diameter than the small diameter portion 141 a. The small diameter portion 141a is a portion of the rotating member 141 located in the direction opposite to the direction D1, and is configured in a cylindrical shape. The large diameter portion 141b is a portion of the rotating member 141 located in the direction D1. The large-diameter portion 141b has a bottom wall portion 141b1 and a side wall portion 141b 2. The bottom wall portion 141b1 extends radially from the end in the direction D1 of the small-diameter portion 141a, and is formed in an annular and plate-like shape. The side wall portion 141b2 is formed in a cylindrical shape extending in the direction D1 from the peripheral edge portion of the bottom wall portion 141b 1. The side wall 141b2 may also be referred to as a peripheral wall or a cylindrical wall. The large-diameter portion 141b is provided with a recess 141b3 that opens in the direction D1.

The side wall portion 141b2 of the large-diameter portion 141b is provided with teeth of the third gear 133. That is, the rotating member 141 is also the third gear 133. The portion where the teeth of the third gear 133 are provided is an example of the driven portion. The cylindrical portion 112 of the housing 110 is accommodated in the recess 141b 3. In the recess 141b3, the thrust bearing 143 is located between the end 112a of the cylindrical portion 112 in the opposite direction to the direction D1 and the bottom wall portion 141b 1. The thrust bearing 143 receives a load in the axial direction of the third rotation center Ax3, and the thrust bearing 143 is a thrust roller bearing in the example of fig. 5, but is not limited to this. The large-diameter portion 141b and the rotating member 141 are rotatably supported by the housing 110 via a thrust bearing 143.

The small diameter portion 141a is inserted into the radial bearing 144 housed in the first hole 113a of the housing 110. First hole 113a has a substantially circular cross section. The first hole portion 113a extends in the axial direction of the third rotation center Ax 3. The small diameter portion 141a and the rotating member 141 are rotatably supported by the housing 110 via the radial bearing 144. The radial bearing 144 is a metal bushing in the example of fig. 5, but is not limited thereto.

The rotating member 141 is provided with a through hole 141c having a circular cross section and penetrating the small diameter portion 141a and the bottom wall portion 141b 1. The through hole 141c is provided with a female screw portion 145 a.

The linear motion member 142 extends along the third rotation center Ax3 and penetrates the rotation member 141. The linear motion member 142 includes a rod-shaped portion 142a and a coupling portion 142 b.

The rod-shaped portion 142a is inserted into the through hole 141c of the rotating member 141, the recess 141b3 of the large-diameter portion 141b of the rotating member 141, and the second hole 113b provided in the cylindrical portion 112 of the housing 110. Second hole 113b has a substantially circular cross section. The second hole portion 113b is located in the direction D1 of the first hole portion 113a and extends in the axial direction of the third rotation center Ax 3. The rod-shaped portion 142a has a substantially circular cross section. The rod-shaped portion 142a is provided with an external thread portion 145b, and the external thread portion 145b is engaged with the internal thread portion 145a of the rotating member 141.

The coupling portion 142b is coupled to the end portion 82a of the cable 82 via a coupling member 146. As shown in fig. 7, the coupling member 146 penetrates the end 82a and the coupling portion 142b of the cable 82. The coupling member 146 is, for example, a pin.

As shown in fig. 7, a groove 113c is provided on the inner surface of second hole 113b provided in cylindrical portion 112 of case 110. The groove 113c extends along the third rotation center Ax3 with a substantially constant width and depth. The groove portions 113c are provided at two locations across the third rotation center Ax 3. The longitudinal end of the coupling member 146 is inserted into the groove 113 c. The width of the groove 113c in the circumferential direction of the third rotation center Ax3 is set slightly larger than the width of the end portion in the longitudinal direction of the coupling member 146. Accordingly, the coupling member 146 abuts against the circumferential surface of the groove 113c, and thereby the rotation of the coupling member 146 and thus the linear motion member 142 around the third rotation center Ax3 is restricted. As shown in fig. 6, the coupling member 146 is movable in the recess 141b 3. That is, in the state where the linear motion member 142 is located at the braking position Pb, the coupling member 146 is located in the concave portion 141b 3. Further, the surface 113D of the groove 113c shown in fig. 7 in the direction D1 regulates the movement of the coupling member 146 in the direction D1. The surface 113d may be referred to as a stopper or a position restricting portion. The structure of coupling the linear motion member 142 and the cable 82 is not limited to the example of fig. 7.

In this configuration, when the rotation of the shaft 122 of the motor 120 is transmitted to the rotating member 141 via the speed reduction mechanism 130 to rotate the rotating member 141, the internal thread portion 145a of the rotating member 141 engages with the external thread portion 145b of the linear motion member 142, and the linear motion member 142 is restricted from rotating by the housing 110 in the groove portion 113c, whereby the linear motion member 142 moves between the non-braking position Pn (fig. 5) and the braking position Pb (fig. 6) in the axial direction of the third rotation center Ax 3.

The portion of the cylindrical portion 112 of the housing 110 where the groove portion 113c is provided is an example of a rotation restricting portion that restricts rotation of the coupling member 146 and thus the linear motion member 142 around the third rotation center Ax3, and is also an example of a guide portion that guides the coupling member 146 and thus the linear motion member 142 in the axial direction of the third rotation center Ax 3.

< Cable guide >

As shown in fig. 2 and 8, the brake device 2 includes a cable guide 85, and the cable guide 85 receives and guides the cable 82.

As shown in fig. 9, the cable guide 85 includes a first cover 86 and a second cover 87 fixed to the first cover 86. As shown in fig. 10, a cable 82 is inserted into the first cover 86 and the second cover 87. The first cover portion 86 is also referred to as a base member or a non-telescopic member, and the second cover portion 87 is also referred to as a telescopic member or a bellows. In other words, the first cover portion 86 is formed of a non-stretchable member, and the second cover portion 87 is formed of a stretchable member that stretches and contracts in the extending direction of the cable 82.

As shown in fig. 9, the first hood 86 extends along the cable 82 in a state of covering the cable 82. Specifically, as shown in fig. 11 and 12, the first cover portion 86 is formed in a cylindrical shape. That is, the first cover portion 86 is configured as a closed cross section. The first cover portion 86 is formed of a metal pipe, for example. The first hood 86 guides the cable 82 to be slidable. First cover 86 is supported by base plate 6. The first hood portion 86 is made of a metal material.

As shown in fig. 11 and 12, the first cover portion 86 has a base end portion 86a and a tip end portion 86b opposite to the base end portion 86 a. The base end portion 86a is inserted through the opening 6d of the bottom plate 6 and fixed to the bottom plate 6 (see fig. 5). The first cover portion 86 has three linear portions 86d1, 86d2, and 86d3 and two curved portions 86e1 and 86e2 between the base end portion 86a and the tip end portion 86 b. A curved portion 86e1 is provided between the linear portion 86d1 and the linear portion 86d2, and a curved portion 86e2 is provided between the linear portion 86d2 and the linear portion 86d 3.

As shown in fig. 10, the first cover portion 86 is provided with a through hole 86c spanning the base end portion 86a and the tip end portion 86 b. The cable 82 is inserted into the through hole 86c, and the cable 82 moves relative to the first cover 86. The first cover portion 86 constitutes a first lubricant accommodating portion 86i accommodating a lubricant 88 between the cable 82 and the first cover portion 86. The lubricant 88 is, for example, grease or the like. The first lubricant housing portion 86i is included in the through hole 86 c. Further, the first cover portion 86 has: a large diameter portion 86h1 provided at the tip portion 86b, and a small diameter portion 86h2 having an outer diameter smaller than that of the large diameter portion 86h 1. The inner diameter of first cover 86 is large enough to allow engagement member 84 provided in cable 82 to pass therethrough. The base end portion 86a is also referred to as one end portion (end portion), and the tip end portion 86b is also referred to as the other end portion (end portion).

As shown in fig. 9, the second cover 87 extends along the cable 82 in a state of covering the cable 82. Specifically, as shown in fig. 13, the second cover portion 87 is formed in a cylindrical shape. That is, the second cover 87 is formed to have a closed cross section. The second cover 87 has a base end 87a, a tip end 87b opposite to the base end 87a, and a bellows-shaped expansion portion 87c extending between the base end 87a and the tip end 87 b. The second cover 87 is provided with a through hole 87d spanning between the base end 87a and the tip end 87b via the extendable portion 87 c. As shown in fig. 10, the cable 82 is inserted into the through hole 87 d. The second cover 87 constitutes a second lubricant storage 87e that stores a lubricant 88 between the cable 82 and the second cover 87. The second lubricant housing portion 87e is connected to the first lubricant housing portion 86 i. The second lubricant storage portion 87e is included in the through hole 87 d. The second cover 87 is made of an elastic body or the like, for example. The base end portion 87a is also referred to as one end portion (end portion), and the tip end portion 87b is also referred to as the other end portion (end portion).

As shown in fig. 10, the base end portion 87a is fixed to the tip end portion 86b of the first cover portion 86 in a state where the lubricant 88 does not leak from the first lubricant housing portion 86i and the second lubricant housing portion 87e (from the base end portion 87a and the tip end portion 86b) (in a state where leakage is restricted). Specifically, the base end portion 87a has, on its inner periphery: a large-diameter portion 87f1 that receives the large-diameter portion 86h1 of the first cover portion 86 and engages with the large-diameter portion 86h 1; and a small diameter portion 87f2 that accommodates a part of the small diameter portion 86h 2. The large-diameter portion 87f1 and the small-diameter portion 87f2 are in close contact with the large-diameter portion 86h1 and the small-diameter portion 86h2 (the linear portion 86d3), and the base end portion 87a and the tip end portion 86b are sealed. Further, annular recesses 86k and 86l are provided on the inner and outer peripheries of the base end portion 87a, respectively. The portions of the base end 87a where the recesses 86k and 86l are provided are thin, and the base end 87a is easily elastically deformed. Thus, for example, even when the base end portion 87a is turned up with another member hooked thereto, a load for deforming the turning up is not easily transmitted to the tip end portion 87b side of the concave portions 86k and 86 l. Thus, even when another member is hooked to the base end portion 87a, the sealing function is maintained on the tip end portion 87b side of the concave portions 86k and 86 l.

The distal end portion 87b is located at a position away from the first cover portion 86, and is fixed to the cable 82 in a state where the lubricant 88 does not leak from the second lubricant housing portion 87e (the distal end portion 87b) (in a state where leakage is restricted). Specifically, the distal end portion 87b is crimped to a portion of the cable 82 located outside the first cover portion 86 by a fixing member 89, and moves integrally with the cable 82. Here, the cable 82 includes a core member 82c and a waterproof coating 82d covering the outer periphery of the core member 82 c. The waterproof coating 82d is made of a synthetic resin material such as nylon or PBT. A waterproof coating 82d is interposed between the distal end portion 87b and the core member 82 c. The waterproof coating 82d may be provided only on the portion of the cable 82 where the fixing member 89 is provided, may be provided over the entire length of the cable 82, or may be provided on the portion of the cable 82 where the fixing member 89 is provided and on the portion exposed to the outside of the second cover 87. The base end portion 87a is an example of a first fixing portion, and the tip end portion 87b is an example of a second fixing portion. The waterproof coating 82d is also referred to as a resin portion or a film portion.

In the second cover 87 having the above-described structure, the extensible portion 87c extends and contracts in accordance with the relative movement of the cable 82 with respect to the first cover 86.

Next, a fixing structure of the cable guide 85 will be described in detail. As shown in fig. 14, in the cable guide 85, the first cover portion 86 is fixed to the bottom plate 6 by the

welding portions

90 and 91. The first cover portion 86 is fixed to the bottom plate 6 at two locations (welded portions 90, 91) distant from each other in the extending direction of the cable 82. First cover 86 may be fixed to bottom plate 6 at three or more locations that are distant from each other in the extending direction of cable 82. The

welding portions

90 and 91 are examples of cable guide fixing portions.

As shown in fig. 15, the welded portion 90 is provided so as to be interposed between the base end portion 86a of the first cover portion 86 and the edge portion of the opening portion 6d of the bottom plate 6 (the surface 6a of the bottom plate 6). Only a part of the entire circumference of the cable 82 (around the central axis of the first cover portion 86) at the base end portion 86a is fixed to the base plate 6 by the welding portion 90.

As shown in fig. 14 and 16, the two welded portions 91 are provided near the distal end portion 86b of the base end portion 86a and the distal end portion 86 b. The two welded portions 91 fix the first cover portion 86 to the convex portion 6e provided on the bottom plate 6. The two welding portions 91 are provided so as to be distant from each other around the cable 82 in the first hood portion 86.

As described above, in the present embodiment, first cover portion 86 (cable guide 85) is fixed to bottom plate 6 by welding

portions

90 and 91, and

welding portions

90 and 91 are fixing portions different from fixing member 115 that is a fixing portion for fixing housing 110 (drive mechanism 100) to bottom plate 6. That is, the cable guide 85 and the drive mechanism 100 are fixed by different fixing portions.

As shown in fig. 5, base end portion 86a of first cover portion 86 is inserted into second hole portion 113b provided in cylindrical portion 112 of case 110. An annular seal member 116 is interposed between the cylindrical portion 112 and the base end portion 86 a. That is, annular seal member 116 interposed between first cover portion 86 and housing 110 enters second hole portion 113 b. The sealing member 116 is, for example, an O-ring made of an elastic body. The seal member 116 enters a recess 113e provided in the housing 110. The recess 113e is formed in a ring shape surrounding the base end portion 86 a. A sealing member 116 seals between housing 110 and first cup portion 86.

In the above configuration, the end of the cable guide 85 on the drive mechanism 100 side is open into the housing 110, and the end of the cable guide 85 on the brake shoe 3 side is closed.

As described above, in the present embodiment, the cable guide 85 includes the first cover portion 86 having a closed cross section and the second cover portion 87 having a closed cross section, and the lubricant 88 is stored in the first lubricant storage portion 86i of the first cover portion 86 and the second lubricant storage portion 87e of the second cover portion 87. In addition, the second cover 87 has: a base end portion 87a (first fixing portion) fixed to the first cover portion 86 in a state where the lubricant 88 does not leak from the first lubricant housing portion 86i and the second lubricant housing portion 87 e; and a distal end portion 87b (second fixing portion) that is separated from the first cover portion 86 and is fixed to the cable 82 in a state where the lubricant 88 does not leak from the second lubricant housing portion 87e, the second cover portion 87 extending and contracting in association with the relative movement of the cable 82 with respect to the first cover portion 86. This facilitates suppression of wear of the cable guide 85 and the cable 82, for example, by the lubricant 88 in the cable guide 85. In addition, since the generation of rust and abrasion powder in the cable guide 85 and the mixing of rust and abrasion powder into the cable guide 85 from the outside are suppressed, the stability and durability of the driving efficiency of the driving mechanism 100 are easily improved. Therefore, for example, in a system in which the driving state of the driving mechanism 100 (motor 120) is controlled based on the driving current value, it is easy to suppress the driving current value from becoming abnormal.

In the present embodiment, for example, the first cover portion 86 has two curved portions 86e1, 86e2 between a base end portion 86a and a tip end portion 86b, which are both ends of the first cover portion 86 in the extending direction. Thus, for example, compared to the case where the first cover portion 86 is provided with one curved portion, the force applied to the sliding portion of the first cover portion 86 that slides with respect to the cable 82 is easily dispersed, and therefore, the durability of the first cover portion 86 and the cable 82 is easily improved. In addition, the first cover portion 86 is easier to manufacture than when three or more curved portions are provided in the first cover portion 86. In addition, the dimensional accuracy of first cover portion 86 is easily improved as compared with the case where first cover portion 86 is entirely bent.

In the present embodiment, the first cover portion 86 is fixed to the bottom plate 6 (support member) by at least two portions (welding portions 90, 91) that are separated from each other in the extending direction of the cable 82. This facilitates, for example, the fixing strength of the cable guide 85 and the rigidity of the bottom plate 6. In the present embodiment, since the first cover portion 86 is fixed to the bottom plate 6 (support member) by the

welding portions

90 and 91, the fixing strength of the cable guide 85 and the rigidity of the bottom plate 6 can be further improved.

In the present embodiment, an annular seal member 116 interposed between the base end portion 86a and the housing 110 enters the recess 113e of the housing 110. This facilitates simplification of the sealing structure, for example, compared to a method in which a sealing member is interposed between the drive mechanism 100 and the bottom plate 6 and between the bottom plate 6 and the cable guide 85.

In the present embodiment, the base end portion 86a is made of a metal material, and is fixed to the bottom plate 6 by the welding portion 90 only around a part of the entire circumference of the cable 82. This can shorten the welding time as compared with the case of the entire circumference of the welding base end portion 86 a.

In the present embodiment, the cable 82 includes a core member 82c and a waterproof coating 82d, in which the waterproof coating 82d covers the outer periphery of the core member 82c and is interposed between the core member 82c and the base end portion 87 a. This suppresses the suction of water from the outside to the inside of the second cover 87 due to the capillary phenomenon.

In the present embodiment, the inner diameter of the first cover portion 86 is large enough to allow the engaging member 84 provided in the cable 8 to pass therethrough. Thus, for example, when the drive mechanism 100 is attached and detached, the engagement member 84 can pass through the first cover portion 86, and therefore, the attachment and detachment of the drive mechanism 100 are facilitated.

In the present embodiment, an example is shown in which only a part of the entire circumference of the cable 82 in the base end portion 86a of the first cover portion 86 is fixed to the bottom plate 6 by the welding portion 90, but the present invention is not limited to this. The entire circumference of the cable 82 at the base end portion 86a may be fixed to the bottom plate 6 by the welding portion 90. In this case, for example, the fixing strength of first cover portion 86 and the sealing property between base plate 6 and first cover portion 86 can be ensured. The fixing of first cover 86 and second cover 87 is not limited to the above-described structure. For example, the proximal end portion 87a of the second cover portion 87 may be inserted into and fixed to the distal end portion 86b of the first cover portion 86.

(second embodiment)

The present embodiment shown in fig. 17 and 18 differs from the first embodiment mainly in the structure and fixing structure of the cable guide 85.

As shown in fig. 17, the cable guide 85 includes a bracket 95 in addition to the first cover 86 and the second cover 87. Bracket 95 is fixed to the outer periphery of base end portion 86a of first cover portion 86. Bracket 95 has fixing portion 95a, and fixing portion 95a is connected to first cover portion 86 and extends outward of first cover portion 86. As shown in fig. 18, the fixing portion 95a is fixed to the base plate 6 and the housing 110 by a fixing member 115. That is, in the present embodiment, the cable guide 85 and the drive mechanism 100 are fastened to the bottom plate 6 together by the same fastener 115 (fixing portion). In the present embodiment, the

welding portions

90 and 91 are not provided. In the present embodiment, the fixing member 115 is an example of a common fixing portion.

In the above configuration, for example, the cable guide 85 and the drive mechanism 100 are fixed to the bottom plate 6 by the same fixing member 115 (fixing portion), so that the configuration of the brake device 2 can be easily simplified. Further, the cable guide 85 and the drive mechanism 100 can be attached and detached, and the replacement workability is improved.

(third embodiment)

The present embodiment shown in fig. 19 differs from the first embodiment mainly in the fixing structure of the cable guide 85. In the present embodiment, the cable guide 85 is fixed to the bottom plate 6 by a plate 96. Plate 96 is fixed to boss 6e together with plate 97. Specifically, plate 96 is fixed to boss 6e in a state of being sandwiched between boss 6e and plate 97. The plate 96 extends toward the first cover portion 86 of the cable guide 85, and an end portion (distal end portion) of the plate 96 on the first cover portion 86 side is fixed to the distal end portion 86b of the first cover portion 86 by a welding portion 91. In the present embodiment, base end portion 86a of first cover portion 86 is fixed to bottom plate 6 by welding portion 90 (see fig. 15). That is, at least both end portions (base end portion 86a, front end portion 86b) of the first cover portion 86 in the extending direction of the first cover portion 86 are fixed to the bottom plate 6. In addition, other parts of the first cover portion 86 than the base end portion 86a and the tip end portion 86b may be fixed to the bottom plate 6.

In the above configuration, the welded portion 91 fixes the tip end portion of the plate 96 extending from the convex portion 6e toward the first cover portion 86 to the first cover portion 86. This facilitates the welding operation, as compared with the case where first cover portion 86 is directly welded to convex portion 6 e.

(fourth embodiment)

The present embodiment shown in fig. 20 differs from the first embodiment mainly in the shape of the first cover portion 86 of the cable guide 85. In the present embodiment, the small diameter portion 86h2 of the first cover portion 86 is formed in a curved shape over the entire length. The small diameter portion 86h2 is an example of a curved portion provided between the base end portion 86a and the tip end portion 86 b. The first cover portion 86 may be formed in a curved shape over the entire length thereof. In this case, if the outer diameter of first cover portion 86 is substantially constant over the entire length, first cover portion 86 is easily bent.

In the above configuration, for example, as compared with the case where the small-diameter portion 86h2 is provided with a linear portion, the force applied to the sliding portion of the first cover portion 86 that slides with respect to the cable 82 is easily dispersed.

(fifth embodiment)

The present embodiment shown in fig. 21 to 24 differs from the first embodiment mainly in the structure of the cable guide 85. As shown in fig. 21 and 22, the cable guide 85 of the present embodiment includes a metal member 98 in addition to the first cover portion 86 and the second cover portion 87 (not shown in fig. 21 and 22). In the present embodiment, as shown in fig. 23, the first cover portion 86 is made of a synthetic resin material such as nylon or PBT. A ring-shaped recess 86p is provided at a distal end portion 86b of the first cover portion 86, and a convex portion (not shown) of the second cover portion 87 is fitted into the recess 86p, whereby the first cover portion 86 and the second cover portion 87 are fixed to each other. The shape of the distal end portion 86b may be the same as that of the first embodiment.

As shown in fig. 24, the metal member 98 has a support portion 98a and a fixing portion 98 b. The metal member 98 can be made of the same metal material as the bottom plate 6, for example.

As shown in fig. 21, support portion 98a is formed in a substantially U-shaped cross section and extends along the outer periphery of first cover portion 86. Support portion 98a supports first cover portion 86 in a state of covering a part of the outer periphery of first cover portion 86. First cover portion 86 is fitted to support portion 98 a. A recess 98c is provided between both ends of the support portion 98a in the extending direction. Support portion 98a is easily deformed by recess 98c, and support portion 98a is easily deformed so that support portion 98a sandwiches first cover portion 86.

Fixing portion 98b extends from the end of support portion 98a on the bottom plate 6 side toward the outside of first cover portion 86. The fixing portion 98b is formed in a plate shape along the bottom plate 6, and is fixed to the bottom plate 6. The fixing portion 98b is provided with a through hole 98 d. The fixing portion 98b may be fixed to the bottom plate 6 and the case 110 by a fixing member 115 (not shown in fig. 21) inserted into the through hole 98d, or may be fixed to the bottom plate 6 by a welding portion (not shown).

As shown in fig. 21, support portion 98a and first cover portion 86 extend obliquely with respect to surface 98b1 of fixing portion 98b that overlaps bottom plate 6.

In the above configuration, since the first cover portion 86 is made of a synthetic resin material, the weight of the cable guide 85 can be easily reduced.

In the present embodiment, support portion 98a and first cover portion 86 extend obliquely with respect to surface 98b1 of fixing portion 98b that overlaps bottom plate 6. Thus, for example, when the cable 82 is inserted into the floor panel 6 so as to be inclined with respect to the wheel axis, the amount of bending (angle) for inclining the surface 6a of the floor panel 6 that supports the surface 98b1 of the cable guide 85 can be reduced or eliminated.

(sixth embodiment)

The present embodiment shown in fig. 25 differs from the first embodiment mainly in the shape of the first cover portion 86 of the cable guide 85.

The first cover portion 86 of the present embodiment is provided with a diameter changing portion 86 q. The outer diameter of the diameter-varied portion 86q decreases from the base end portion 86a side toward the tip end portion 86b side. The diameter changing portion 86q is provided with a surface 86r facing the bottom plate 6. The face 86r overlaps the bottom plate 6. The surface 86r has a through hole 86c penetrating therethrough. The center 86ca of the through hole 86c in the surface 86r is eccentric with respect to the center 86ra of the surface 86 r. For example, the center 86ca of the through hole 86c is eccentric so as to be located inside the curved outer side of the first cover portion 86. The center 86ca of the through hole 86c may be eccentric so as to be located outside the curved inner side of the first cover portion 86. In this configuration, as an example, a large area of the surface 86r opposite to the eccentric side of the center 86ca of the through hole 86c can be secured. This allows the surface 86r opposite to the eccentric side of the center 86ca of the through hole 86c to receive a load.

(seventh embodiment)

The present embodiment shown in fig. 26 differs from the first embodiment mainly in the shape of the first cover portion 86 of the cable guide 85.

The first cover portion 86 of the present embodiment has a large diameter portion 86s and a small diameter portion 86 t. The large diameter portion 86s extends from the base end portion 86a toward the tip end portion 86 b. The large diameter portion 86s is fixed to the bottom plate 6. The small-diameter portion 86t extends from the large-diameter portion 86s toward the distal end portion 86 b. The small diameter portion 86t has an outer diameter smaller than that of the large diameter portion 86 s. The diameter of the through hole 86c is substantially constant in the large diameter portion 86s and the small diameter portion 86 t. In this configuration, for example, since the thickness of the large diameter portion 86s is easily increased, the large diameter portion 86s is easily firmly fixed to the bottom plate 6 by welding.

In addition, a plurality of elements in the above-described embodiments may be combined within a range that can be technically realized.

The above embodiments disclose the remarks.

The brake for a vehicle includes the cable guide, the brake member, the drive mechanism, the cable, and a support member.

The first cover portion has a bent portion bent between both end portions of the first cover portion.

The cable guide includes a fixing portion having a surface overlapping with a surface of the support member, the fixing portion being connected to the first cover portion and extending outward of the first cover portion,

the first cover portion extends obliquely with respect to a surface of the fixing portion.

The first cover section is provided with a first through hole that extends across both ends of the first cover section and includes the first lubricant storage section,

the cable guide has a surface overlapping the support member and through which the through hole passes,

the through hole in the surface is eccentric with respect to the center of the surface.

The first cover portion is fixed to the support member at least two locations that are distant from each other in an extending direction of the cable.

The drive mechanism has a housing provided with a recess,

an annular seal member interposed between the base end portion of the first cover portion and the housing enters the recess.

The first cover portion is made of a metal material, and is fixed to the support member around an outer peripheral portion of the cable by a ring-shaped weld portion surrounding the outer peripheral portion.

The first cover portion is made of a metal material, and is fixed to the support member by a weld portion around only a part of an outer circumferential portion of the cable in a circumferential direction.

The above-mentioned driving mechanism is equipped with a shell body,

the cable guide has a fixing portion connected to the first cover portion and extending outward of the first cover portion,

the fixing part is fixed on the shell by a fixing part.

The cable guide includes a metal member that supports the first cover portion and is fixed to the support member,

the first cover portion is made of a synthetic resin material.

The cable includes a core member and a waterproof coating film that covers an outer periphery of the core member and is interposed between the core member and the second fixing section.

The embodiments of the present invention have been described above, but the above embodiments are merely examples and are not intended to limit the scope of the present invention. The above embodiments can be implemented by other various embodiments, and various omissions, substitutions, combinations, and changes can be made without departing from the spirit of the invention. Further, specifications (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, and the like) of each structure, shape, and the like can be appropriately changed and implemented.

For example, in the above-described embodiment, the brake device 2 is configured as a lead drum brake, but the present invention may be configured as a brake device of another form.

Description of the reference numerals

1 … wheels; 2 … brake device (brake for vehicle); 3 … brake shoes (brake members); 6 … floor (support member); 82 … cable; 85 … cable guide; 86 … first cover portion; 86e1, 86e2 … curved portions; 86i … first lubricant housing; 87 … second cover portion; 87e … second lubricant storage; 88 … a lubricant; 110 … housing.

Claims

1. A vehicle brake comprising:

a brake member;

a drive mechanism;

a support member that fixes the drive mechanism;

a cable interposed between the brake member and the drive mechanism, the cable pulling the brake member by power of the drive mechanism to brake a wheel; and

a cable guide that receives and guides the cable,

the cable guide is provided with:

a first cover portion that is made of a metal material, has a closed cross section, extends along the cable in a state of covering the cable, guides the cable to be slidable, and has a first lubricant accommodating portion that is capable of accommodating a lubricant between the first cover portion and the cable; and

a second cover section configured to have a closed cross section, extend along the cable in a state of covering the cable, and configure a second lubricant housing section that is connected to the first lubricant housing section and is capable of housing lubricant with the cable, the second cover section having a first fixing section that is fixed to the first cover section in a state in which lubricant does not leak from the first lubricant housing section and the second lubricant housing section, and a second fixing section that is remote from the first cover section and is fixed to the cable in a state in which lubricant does not leak from the second lubricant housing section, the second cover section being expanded and contracted in accordance with relative movement of the cable with respect to the first cover section,

the drive mechanism has a housing provided with a recess,

2. The brake for vehicle according to claim 1,

the first cover portion has two curved portions between the base end portion and a tip end portion of the first cover portion on a side opposite to the base end portion.

3. The vehicle brake according to claim 1, comprising:

a drive mechanism fixing portion that fixes the drive mechanism to the support member; and

and a cable guide fixing portion that is different from the drive mechanism fixing portion and fixes the cable guide to the support member.

4. The brake for vehicle according to claim 1,

the vehicle brake includes a common fixing portion that fixes the cable guide and the drive mechanism to the support member.

5. The brake for vehicle according to claim 1,

the cable is provided with an engaging member that engages with a lever for driving the brake member,

the first cover portion has an inner diameter that is large enough to allow the engaging member to pass therethrough.

6. The brake for vehicle according to claim 1,

the first cover portion is fixed to the support member by at least two portions that are away from each other in an extending direction of the cable.

7. The brake for vehicle according to claim 1,

the vehicle brake includes a fixing portion having a surface overlapping a surface of the support member, the fixing portion being connected to the first cover portion and protruding outward of the first cover portion,

the first cover portion extends obliquely with respect to the surface of the fixing portion protruding outward of the first cover portion, the surface overlapping the support member.

8. The brake for vehicle according to claim 1,