CN112368488A - Brake device - Google Patents

Abstract

The brake device includes, for example: a braking member that brakes a drum rotor that rotates integrally with a wheel by being pressed against the drum rotor; a back plate supporting the braking member; an electric actuator provided on the back plate and actuating the brake member; and a protector which is provided at a position where the whole is deviated in the circumferential direction of the wheel with respect to a first portion of the electric actuator which is closest to the inner circumferential surface of the circumferential wall of the wheel, and which is stationary with respect to the back plate.

Description

Brake device

Technical Field

The present disclosure relates to a brake device.

Background

Conventionally, there is known a brake device including: a braking member braking a drum rotor rotating integrally with a wheel; a back plate supporting the braking member; and an electric actuator provided in the back plate and operating the brake member (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-187463

Disclosure of Invention

Technical problem to be solved by the invention

In the brake device of patent document 1, for example, when the vehicle moves forward or backward while the deposits such as snow and ice are deposited on the inner circumferential surfaces of the wheels when the vehicle is stopped, the deposits rotating together with the wheels may contact the electric actuator.

Therefore, one of the technical problems to be solved by the present disclosure is to obtain a novel brake device which is less likely to cause troubles, such as the prevention of an electric actuator from being affected by an attachment attached to a wheel during rotation of the wheel.

Technical solution for solving technical problem

The brake device of the present disclosure includes, for example: a braking member that brakes a drum rotor that rotates integrally with a wheel by being pressed against the drum rotor; a back plate for supporting the braking member; an electric actuator provided on the back plate to actuate the brake member; and a guard which is provided at a position where the guard as a whole is displaced in the circumferential direction of the wheel with respect to a first portion of the electric actuator which is closest to the inner circumferential surface of the circumferential wall of the wheel, and which is stationary with respect to the back plate.

According to this configuration, for example, when the wheel rotates, the guard can suppress the electric actuator from being affected by an object attached to the wheel.

Drawings

Fig. 1 is an exemplary and schematic side view of a brake device of a first embodiment, as viewed from the rear side of a vehicle.

Fig. 2 is an exemplary and schematic front view of the brake device of the first embodiment as viewed from the outside in the vehicle width direction.

Fig. 3 is an exemplary and schematic front view showing the operation of the brake member based on the moving mechanism of the brake device of the first embodiment, and is a view of a non-braking state.

Fig. 4 is an exemplary and schematic front view showing the action of the brake member based on the moving mechanism of the brake device of the first embodiment, and is a view of a braking state.

Fig. 5 is an exemplary and schematic plan view of the brake device of the first embodiment as viewed from the upper side of the vehicle.

Fig. 6 is an exemplary and schematic rear view of the brake device and the wheel of the first embodiment, as viewed from the inside in the vehicle width direction.

Fig. 7 is an exemplary and schematic side view of the brake device of the first modification as viewed from the rear side of the vehicle.

Fig. 8 is an exemplary and schematic front view of a brake device of a second modification as viewed from the outside in the vehicle width direction.

Fig. 9 is an exemplary and schematic rear view of the brake device of the second modification as viewed from the inside in the vehicle width direction.

Fig. 10 is an exemplary and schematic side view of a scraper of a brake device of a third modification, as viewed from the front side of the vehicle.

Fig. 11 is an exemplary and schematic rear view of the brake device of the fourth modification as viewed from the inside in the vehicle width direction.

Fig. 12 is an exemplary and schematic side view of a brake device of a fourth modification as viewed from the front side of the vehicle.

Fig. 13 is an exemplary and schematic rear view of a brake device of a fifth modification as viewed from the inside in the vehicle width direction.

Fig. 14 is an exemplary and schematic side view of a brake device of a fifth modification as viewed from the rear side of the vehicle.

Fig. 15 is an exemplary and schematic rear view of a brake device of a sixth modification as viewed from the inside in the vehicle width direction.

Fig. 16 is an exemplary and schematic side view of a brake device of a sixth modification as viewed from the rear side of the vehicle.

Fig. 17 is an exemplary and schematic rear view of a brake device of a seventh modification as viewed from the inside in the vehicle width direction.

Fig. 18 is an exemplary and schematic rear view of the brake device of the second embodiment, as viewed from the inside in the vehicle width direction.

Fig. 19 is an exemplary and schematic side view of the brake device of the second embodiment, as viewed from the rear side of the vehicle.

Fig. 20 is an exemplary and schematic rear view of the brake device of the eighth modification as viewed from the inside in the vehicle width direction.

Fig. 21 is an exemplary and schematic rear view of the braking device of the ninth modification as viewed from the inside in the vehicle width direction.

Detailed Description

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

The embodiments and modifications disclosed below include the same components. Therefore, in the following, common reference numerals are given to these same components, and redundant description is omitted. In the present specification, the numbers are used only for distinguishing components, parts, portions, positions, directions, and the like, and do not indicate the order or the degree of preference.

In the following drawings, three directions orthogonal to each other are defined for convenience of explanation. The direction X is along the vehicle front-rear direction and toward the vehicle front side. The direction Y is along the vehicle width direction and is directed outward in the vehicle width direction. The direction Z is along the vehicle up-down direction, and toward the vehicle upper side. In the following description, unless otherwise specified, the axial direction of the rotation center a × of the wheel 1 is simply referred to as the axial direction, the radial direction of the rotation center a × is simply referred to as the radial direction, and the circumferential direction of the rotation center a × is simply referred to as the circumferential direction. The axial direction is along the vehicle width direction (direction Y). In the figure, an arrow F directed toward one of the circumferential directions (clockwise direction in fig. 2) is shown.

[ first embodiment ] to provide a liquid crystal display device

[ Structure of brake device ]

Fig. 1 is a side view of a vehicle brake device 2 according to a first embodiment as viewed from the rear side of the vehicle, fig. 2 is a front view of the brake device 2 as viewed from the outside in the vehicle width direction, fig. 3 is a front view showing the operation of a brake shoe 3 (brake member) by a moving mechanism 8 of the brake device 2 and is in a non-braking state, and fig. 4 is a front view showing the operation of the brake shoe 3 by the moving mechanism 8 of the brake device 2 and is in a braking state.

As shown in fig. 1 to 4, the braking device 2 includes: brake shoe 3, backing plate 6, moving mechanism 8, electric actuator 100, and scraper 7.

The brake device 2 is housed inside a peripheral wall 1a of a cylindrical wheel 1 (see fig. 1 and 6). The brake device 2 is a so-called drum brake. As shown in fig. 2, the brake device 2 includes two brake shoes 3 separated in the vehicle front-rear direction (direction X). The two brake shoes 3 extend in an arc shape along an inner circumferential surface 4a of a cylindrical drum rotor 4 (see fig. 3 and 4). The drum rotor 4 rotates integrally with the wheel 1 around a rotation center a ×. The brake device 2 moves the two brake shoes 3 so as to contact the inner circumferential surface 4a of the cylindrical drum rotor 4. The drum rotor 4 and the wheel 1 are thereby braked by friction between the brake shoe 3 and the drum rotor 4. The brake shoe 3 is an example of a brake member.

The brake device 2 includes a wheel cylinder 51 (see fig. 2) operated by hydraulic pressure and a motor 120 of the electric actuator 100 operated by energization, and serves as an actuator for operating the brake shoes 3. The wheel cylinders 51 and the motor 120 can operate 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 travel.

As shown in fig. 2, the back panel 6 is formed in a disk shape extending to intersect (intersect orthogonally) the vehicle width direction (direction Y), which is an axial direction. A through hole 6c is provided along the rotation center a × in the center of the back plate 6. As shown in fig. 1, the components of the brake device 2 are provided on both the outside and the inside of the back panel 6 in the vehicle width direction. The back plate 6 directly or indirectly supports each component of the brake device 2. The back plate 6 is also referred to as a support member or the like.

The back panel 6 is connected to a not-shown connecting member connected to the vehicle body. The connecting member is, for example, a part of a suspension (e.g., an arm, a link, a mounting member, etc.). A plurality of openings 6b for coupling with the connection member are provided around the through hole 6c of the back plate 6. The brake device 2 can be used for any of the driving wheels and the non-driving wheels. When the brake device 2 is used for a drive wheel, an axle, not shown, penetrates the through hole 6c of the back plate 6.

[ action of brake shoes based on wheel cylinders ]

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 back panel 6. The brake shoe 3 is movably supported by the backing plate 6. Specifically, as shown in fig. 3, the lower end portion 3a of the brake shoe 3 is rotatably supported by the backing plate 6 about a rotation center C11. The rotation center C11 is parallel to the rotation center a × of the wheel 1.

As shown in fig. 2, the wheel cylinder 51 is supported by the upper end of the back plate 6. The wheel cylinder 51 has two movable portions (pistons), not shown, that can protrude in the vehicle front-rear direction (direction X). The wheel cylinder 51 projects the two movable portions in accordance with the pressurization. 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 C11 (see fig. 3 and 4), respectively, and move so that the upper end portions 3b are separated from each other in the vehicle front-rear direction (direction X). Thereby, the two brake shoes 3 move radially outward of the rotation center a × of the wheel 1. A band-shaped pad 31 along a cylindrical surface is provided on the outer periphery of each brake shoe 3. Therefore, as shown in fig. 4, the pad 31 comes into contact with the inner circumferential surface 4a of the drum rotor 4 by the movement of the two brake shoes 3 outward in the radial direction of the rotation center a ×. The drum rotor 4 and the wheel 1 are braked by friction between the lining 31 and the inner circumferential surface 4a (see fig. 1).

As shown in fig. 2, the braking device 2 includes a return member 32. When the operation of pressing the brake shoes 3 by the wheel cylinders 51 is released, the reset means 32 moves the two brake shoes 3 from the brake position Psb (see fig. 4) in contact with the inner peripheral surface 4a to the non-brake position Psn (initial position, see fig. 3) not in contact with the inner peripheral surface 4 a. The return member 3 is an elastic member such as a coil spring. The restoring member 32 applies a force to each brake shoe 3 in a direction to approach the other brake shoe 3, that is, in a direction to separate from the inner circumferential surface 4 a.

Structure of moving mechanism and movement of brake shoe based on moving mechanism

The moving mechanism 8 moves the two brake shoes 3 from the non-braking position Psn (see fig. 3) to the braking position Psb (see fig. 4) in accordance with the operation of the electric actuator 100 including the motor 120. The moving mechanism 8 is provided on the vehicle width direction outer side (front side in the direction Y) of the back panel 6.

The moving mechanism 8 has a lever 81, a cable 82, and a stay 83. The bar 81 is provided between the brake shoe 3R on the vehicle front side of the two brake shoes 3 and the back plate 6, for example, so as to overlap the brake shoe 3R and the back plate 6 in the vehicle width direction (direction Y). The lever 81 is supported by the brake shoe 3R so as to be rotatable about a rotation center C12. The rotation center C12 is located at the upper end of the brake shoe 3R on the side away from the rotation center C11. The center of rotation C12 is parallel to the center of rotation C11.

The cable 82 moves the lower end portion 81a of the lever 81 on the side away from the rotation center C12 in the direction of the brake shoe 3L on the vehicle rear side of the two brake shoes 3. The cable 82 moves generally along the back panel 6. The stay 83 is interposed between the lever 81 and the brake shoe 3L other than the brake shoe 3R supporting the lever 81, and is supported between the lever 81 and the other brake shoe 3L. The connection position P1 of the lever 81 and the stay 83 is set between the rotation center C12, and the connection position P2 of the end 82b of the cable 82 and the lever 81. The cable 82 is also referred to as an operating member or the like that moves the brake shoe 3.

In the moving mechanism 8 of such a structure, the cable 82 is pulled toward the vehicle rear side, whereby when the lever 81 is moved in a direction to approach the brake shoe 3L (arrow a), the lever 81 presses the brake shoe 3L via the stay 83 (arrow b). Thereby, the brake shoe 3L rotates (arrow C in fig. 4) about the rotation center C11 from the non-braking position Psn (fig. 3), and moves to the braking position Psb (fig. 4) in contact with the inner peripheral surface 4 a. In this state, the connection position P2 of the cable 82 and the lever 81 corresponds to a force point, the rotation center C12 corresponds to a fulcrum, and the connection position P1 of the lever 81 and the stay 83 corresponds to an action point.

Further, when the lever 81 is moved in a direction of pressing the brake shoe 3L (arrow b) in a state where the brake shoe 3L is in contact with the inner peripheral surface 4a, the lever 81 is supported by the stay 83, and the lever 81 is rotated in a direction opposite to the direction in which the lever 81 is moved, that is, in a clockwise direction in fig. 3 and 4, with a connection position P1 with the stay 83 as a fulcrum (arrow d). Thereby, the brake shoe 3R rotates about the rotation center C11 from the non-braking position Psn (fig. 3), and moves to the braking position Psb (fig. 4) in contact with the inner peripheral surface 4a of the drum rotor 4. In this way, both the brake shoes 3L and 3R are moved from the non-braking position Psn to the braking position Psb by the operation of the moving mechanism 8. Further, in a state after the brake shoe 3L has contacted the inner peripheral surface 4a, a connection position P1 between the lever 81 and the stay 83 serves as a fulcrum. The movement amount of the brake shoes 3L and 3R is small, for example, 1mm or less.

[ ELECTRIC ACTUATOR ]

As shown in fig. 1, the electric actuator 100 is fixed to the back plate 6 in a state of protruding from a surface 6a on the vehicle width direction inner side of the back plate 6 to the side opposite to the brake shoe 3. The electric actuator 100 includes a housing 110, a motor 120, a reduction mechanism 130, a motion conversion mechanism 140, and a cable 82 (see fig. 3). The electric actuator 100 pulls the brake shoe 3 through the cable 82, thereby moving the brake shoe 3 from the non-braking position Psn (fig. 3) to the braking position Psb (fig. 4). The cable 82 is also referred to as an action member or the like.

As shown in fig. 1, the housing 110 supports the motor 120, the reduction mechanism 130, and the motion conversion mechanism 140. The housing 110 has a lower housing 112, an intermediate housing 113, a first upper housing 114, and a second upper housing 115. These components are integrated by a coupling member such as a screw or a bolt, insert molding, or the like. The lower case 112 is made of a metal material such as an aluminum alloy, for example. In this case, the lower housing 112 may be manufactured by die casting, for example. The lower housing 112 may also be referred to as a base, body, or the like.

The intermediate case 113, the first upper case 114, and the second upper case 115 are made of, for example, a synthetic resin material. The motor 120 is housed in the first upper case 114 and is covered by a wall portion of the first upper case 114. The motion conversion mechanism 140 and the speed reduction mechanism 130 are housed in the second upper case 115 and covered by a wall portion of the second upper case 115. Further, the structure of the housing 110 is not limited to this example.

As shown in fig. 1 and 2, the first upper case 114 is located on one side in the circumferential direction (F direction) and on the inside in the vehicle width direction with respect to the second upper case 115. The first upper housing 114 is at least partially circumferentially side-by-side with the second upper housing 115. The second upper case 115 protrudes radially outward from the back plate 6 as compared to the first upper case 114. That is, in the present embodiment, the radially outer end 115a of the second upper case 115 is located closest to the inner circumferential surface 1a1 of the wheel 1 in the electric actuator 100. The end portion 115a is an example of the first portion.

[ SCRAPER ] FOR CUTTING

Fig. 5 is a side view of the brake device 2 as viewed from the vehicle upper side, and fig. 6 is a rear view of the brake device 2 and the wheel 1 as viewed from the vehicle width direction inner side. As shown in fig. 5 and 6, the scraper 7 is provided at a position shifted to one side in the circumferential direction (F direction) with respect to the end portion 115a of the electric actuator 100 as a whole. The scraper 7 has a base 7a, fins 7b, and a curved portion 7 c. The scraper 7 is formed in an L shape by bending a single strip-like member at one place (curved portion 7c), for example. The scraper 7 has a substantially L-shaped cross section intersecting the circumferential direction. The scraper 7 may be made of a metal material such as an iron-based material, for example. The scraper 7 may also be called a scraper, or cutter.

The base portion 7a has a band-plate shape, has a substantially constant width in the circumferential direction (F direction), and extends substantially in the radial direction. That is, the base portion 7a extends substantially in the circumferential direction and the radial direction, and intersects and is orthogonal to the vehicle width direction (axial direction). The base portion 7a is fixed to the vehicle width direction inner side surface 6a of the dash panel 6 by welding or a bonding member such as a screw or a bolt. The fins 7b extend inward in the vehicle width direction from a curved portion 7c, which is an end portion of the base portion 7a on the outer side in the radial direction. However, the fins 7b are inclined with respect to the axial direction and the radial direction so as to approach the inner peripheral surface 1a1 (see fig. 1) of the wheel 1 to the radially outer side as going from the base portion 7a to the vehicle width direction inner side. The fins 7b may also be referred to as blades.

Further, the base portion 7a has an outer surface 7d, an inner surface 7e, two edges 7f, and a tip portion 7 g. The outer surface 7d is a surface facing the outside of the fin 7b in the radial direction, and faces the inner circumferential surface 1a1 with a gap therebetween as shown in fig. 6. The inner surface 7e is a surface facing the inside of the fins 7b in the radial direction, and faces at least a part of the first upper case 114 in the electric actuator 100 with a gap. The edges 7f are both ends of the fin 7b in the circumferential direction, and span between the outer surface 7d and the inner surface 7e which are separated from each other in the radial direction. The tip end portion 7g is the vehicle width direction inside end of the fin 7b, and spans between the outer surface 7d and the inner surface 7e and between the two edges 7 f. Both edges 7f extend in the vehicle width direction at positions separated from the end portions 115a in the circumferential direction, intersecting the circumferential direction. The edge 7f is an end of the fin 7b in the circumferential direction.

As shown in fig. 6, the fin 7b is located on one side in the circumferential direction (F direction) and radially outward of the end portion 115a of the electric actuator 100. The fins 7b are positioned on the vehicle upper side with respect to the radially outer end 114a of the first upper case 114. In other words, the fin 7b covers at least a part of the vehicle upper side of the electric actuator 100. The end portion 114a is an example of a second portion of the electric actuator 100 located at the uppermost side of the vehicle.

Fig. 1 shows a virtual rotation body 70 of the fin 7b around the rotation center a × with a two-dot chain line. As is apparent from fig. 1, the virtual rotating body 70 is located between the inner peripheral surface 1a1 and the end portion 115 a. In the present embodiment, the fins 7b cut off the adhering matter (not shown) adhering to the inner peripheral surface 1a1 of the wheel 1 in accordance with the relative rotation of the wheel 1 with respect to the scraper 7. When the deposit is cut along the fins 7b, a portion of the deposit on the inner side in the radial direction than the virtual rotating body 70 is cut off by the fins 7b (scrapers 7), and a portion of the deposit on the outer side in the radial direction than the virtual rotating body 70 may remain. Therefore, as shown in fig. 1, by disposing the virtual rotating body 70 between the inner circumferential surface 1a1 and the end portion 115a, in other words, disposing the virtual rotating body 70 so as to cover the radially outer side of the end portion 115a, it is possible to suppress the contact of the adhering matter adhering (remaining) to the inner circumferential surface 1a1 with the electric actuator 100. The fins 7b (virtual rotating bodies 70) are not limited to this example, and may be provided at the same position as the end portion 115a in the radial direction of the wheel 1, that is, at a position in parallel with the end portion 115a in the circumferential direction, for example. In this way, the scraper 7 is an example of a guard that protects the electric actuator 100 from the attached matter that rotates together with the wheel 1.

As is apparent from fig. 1, the fin 7b extends further inward in the vehicle width direction than the end portion 115a of the electric actuator 100. That is, in the present embodiment, the tip end portion 7g of the virtual rotating body 70 of the fin 7b is positioned further inward in the vehicle width direction than the end portion 115 a. The end portion 115a is an example of an end portion 1b of the peripheral wall 1a on the inside in the vehicle width direction and an outer portion of the end portion 115a disposed further to the outside in the vehicle width direction. The fin 7b (virtual rotating body 70) is not limited to this example, and for example, the tip end portion 7g is more preferably located on the vehicle width direction inner side than the vehicle width direction inner side end portion of the electric actuator 100.

As described above, in the present embodiment, the braking device 2 includes the scrapers 7 (guards) provided in a stationary state with respect to the back plate 6, and the scrapers 7 suppress the influence of the adhering matter adhering to the wheel 1 on the electric actuator 100. The scraper 7 is offset in the circumferential direction with respect to the end portion 115a (first portion) as a whole. According to this structure, for example, the following advantages can be obtained: that is, as compared with the configuration in which the scrapers 7 are not offset from the end portions 115a in the circumferential direction, it is easy to secure the arrangement space of the scrapers 7 (particularly the fins 7b) between the electric actuator 100 and the inner circumferential surface 1a1 of the circumferential wall 1a of the wheel 1, and it is also easy to secure the attachment positions of the scrapers 7 to the back plate 6, or to attach and detach the scrapers 7 to the back plate 6.

In the present embodiment, for example, the scraper 7 includes: a fin 7b having an edge 7f and an outer surface 7 d; and a base 7a supporting the fins 7 b. The edge 7f is one end in the circumferential direction of the fin 7b, extends in the vehicle width direction so as to intersect the circumferential direction, and has an outer surface 7d facing the inner circumferential surface 1a1 with a gap therebetween. According to this configuration, for example, when the wheel 1 to which the attached matter has adhered rotates, the edge 7f of the fin 7b can be brought into contact with the attached matter to at least partially remove the attached matter, whereby the attached matter can be prevented from affecting the electric actuator 100.

In addition, in the present embodiment, for example, the fins 7b are provided such that the virtual rotational body 70 of the fins 7b around the rotation center a × of the wheel 1 is located between the inner peripheral surface 1a1 and the end portion 115 a. If the virtual rotating body 70 is provided further inward in the radial direction than the end 115a from the inner circumferential surface 1a1, there is a possibility that the end 115a may come into contact with the deposit remaining on the inner circumferential surface 1a1 without being removed by the fins 7b, among the deposits adhering to the inner circumferential surface 1a 1. In this regard, according to the present embodiment, since the virtual rotating body 70 is positioned between the inner peripheral surface 1a1 and the end portion 115a, for example, contact between the end portion 115a and the electric actuator 100 with the attached matter can be suppressed.

In the present embodiment, for example, the front end portion 7g of the virtual rotating body 70 on the inside in the vehicle width direction is located on the inside in the vehicle width direction than the end portion 115a (outside portion). If the distal end portion 7g is positioned on the vehicle width direction outer side than the end portion 115a, the end portion 115a may be disturbed by the deposit remaining on the inner peripheral surface 1a1 without being removed by the fins 7 b. In this regard, according to the present embodiment, since the distal end portion 7g is positioned radially side by side with respect to the end portion 115a or is positioned inward in the vehicle width direction from the end portion, for example, contact of attached matter with the end portion 115a and the electric actuator 100 can be suppressed.

In the present embodiment, the fins 7b are inclined with respect to the radial direction and the axial direction so as to be closer to the inner circumferential surface 1a1 as going inward in the vehicle width direction from the base portion 7 a. According to this configuration, for example, the length from the base end (base portion 7a) of the scraper 7 to the tip end portion 7g of the fin 7b can be made relatively short as compared with the case where the fin 7b is provided parallel to the vehicle width direction.

In the present embodiment, the fin 7b covers at least a part of the vehicle upper side of the electric actuator 100. According to this configuration, for example, when the wheel 1 is deviated from the vehicle, the fin 7b can suppress contact between the wheel 1 and the electric actuator 100. In the present embodiment, the fin 7b is disposed above the end 114a (second portion) of the electric actuator 100 located at the uppermost side of the vehicle, and thereby the same effects as those described above can be obtained.

In the present embodiment, the base portion 7a is fixed to the back plate 6. According to such a configuration, for example, the load input to the fins 7b can be released to the back plate 6, and thus the transmission of the impact due to the attached matter to the motor 120 of the electric actuator 100 and the like can be suppressed.

[ first modification ] A method for manufacturing a semiconductor device

Fig. 7 is a rear view of the brake device 2A according to the first modification of the first embodiment, as viewed from the rear side of the vehicle. The brake device 2A has the same configuration as the brake device 2 of the above embodiment. Therefore, the brake device 2A can obtain the same operation and effect as those of the above embodiment based on the same configuration.

However, the present modification differs from the above-described embodiment in that, as shown in fig. 7, the tip end portion 7g of the dummy rotating body 70 of the fin 7b is positioned further inward in the vehicle width direction than the end portion 1b of the peripheral wall 1a on the inner side in the vehicle width direction. In the present modification, the end 1b of the peripheral wall 1a is located outward in the vehicle width direction than the end 115a (first portion) of the electric actuator 100. Therefore, in the present modification, the fin 7b of the scraper 7A is extended to a position in line with the end portion 1b in the radial direction or a position inward in the vehicle width direction from the end portion 1b, whereby the adhering matter adhering to the inner circumferential surface 1a1 can be effectively removed while suppressing an increase in the size of the fin 7 b. The end portion 1b is an example of an outer portion.

[ second modification ] A method for producing a semiconductor device

Fig. 8 is a front view of a brake device 2B according to a second modification of the first embodiment, as viewed from the outside in the vehicle width direction, and fig. 9 is a rear view of the brake device 2B, as viewed from the inside in the vehicle width direction. The brake device 2B has the same configuration as the brake device 2 of the above embodiment. Therefore, the same operation and effect as those of the above embodiment can be obtained by the brake device 2B having the same configuration.

However, the present modification differs from the above-described embodiment in that the scraper 7B is provided at a position offset to the other side in the circumferential direction with respect to the electric actuator 100, as shown in fig. 8 and 9. A waterproof rib 61 is provided on a vehicle width direction outer side surface 6d (see fig. 8) of the back panel 6 so as to be interposed between the back panel and a hub or the like of the wheel 1. The rib 61 protrudes outward in the vehicle width direction from the surface 6d and extends in the circumferential direction. The rib 61 is formed in a C-shape or a U-shape in a line of sight in the vehicle width direction (direction Y). In the present modification, the base portion 7a of the scraper 7B is fixed to a position corresponding to a circumferential cutout portion (notch, opening) of the rib 61 on the vehicle width direction inner side surface 6a (see fig. 9) of the dash panel 6. Thus, according to the present modification, since the scrapers 7B and the ribs 61 can be prevented from interfering with each other, the scrapers 7B can be more easily attached to the back plate 6 without impairing the function of the ribs 61 by, for example, bonding members such as screws or bolts or welding.

[ third modification ] of the invention

Fig. 10 is an exemplary and schematic side view of the scraper 7C of the braking device 2C of the third modification of the first embodiment, as viewed from the front side of the vehicle. The brake device 2C has the same configuration as the brake device 2 of the above embodiment. Therefore, the same operation and effect as those of the above embodiment can be obtained by the brake device 2C having the same configuration.

However, the present modification differs from the above-described embodiment in that the scraper 7C is attached to the electric actuator 100 as shown in fig. 10. Specifically, in the present modification, the base portion 7a of the scraper 7C is fixed to the intermediate housing 113 of the electric actuator 100 by welding or a joint such as a screw or a bolt. Since the electric actuator 100 is fixed to the vehicle width direction inner side surface 6a of the backboard 6 (see fig. 1 and 12), the scraper 7C is provided in a state of being stationary with respect to the backboard 6. As described above, the intermediate case 113 is a portion interposed between the lower case 112 and the first upper case 114 and the second upper case 115, and does not house the motor 120 and the like. Therefore, according to the present modification, for example, the load input to the fins 7b can be released to the intermediate case 113, and therefore, the transmission of the impact due to the attached matter to the motor 120 of the electric actuator 100 and the like can be suppressed.

[ fourth modification ] A method for producing a semiconductor device

Fig. 11 is a rear view of a brake device 2D according to a fourth modification of the first embodiment, as viewed from the inside in the vehicle width direction, and fig. 12 is a side view of the brake device 2D as viewed from the front side of the vehicle. The brake device 2D has the same configuration as the brake device 2 of the above embodiment. Therefore, the same operation and effect as those of the above embodiment can be obtained by the brake device 2D having the same configuration.

However, the present modification differs from the above-described embodiment in that the scraper 7D is mounted between the back plate 6 and the suspension arm 80 (see fig. 12), as shown in fig. 11 and 12. In the present modification, a through hole 7h is provided in the base portion 7a (see fig. 11) of the scraper 7D so as to be aligned with the through hole 6c (see fig. 13) of the back panel 6 in the vehicle width direction, and a plurality of openings 7i are provided around the through hole 7h so as to be aligned with the openings 6b (see fig. 13) in the vehicle width direction. In the present modification, the scrapers 7D are fixed to the back plate 6 and the suspension arm 80 by nuts, bolts, or the like, which are inserted into the openings 6b and 7i and the openings of the end plates 80a (see fig. 12) provided in the suspension arm 80, respectively. In this way, in the present modification, the scraper 7D is provided so as to be sandwiched between the back plate 6 and the suspension arm 80, and therefore, for example, the load input to the fin 7b can be released to the back plate 6 and the suspension arm 80, respectively. The suspension arm 80 is an example of a connecting member connected to the vehicle body.

[ fifth modification ] A method for manufacturing a semiconductor device

Fig. 13 is a rear view of a brake device 2E according to a fifth modification of the first embodiment, as viewed from the inside in the vehicle width direction, and fig. 14 is a side view of the brake device 2E as viewed from the rear side of the vehicle. The brake device 2E has the same configuration as the brake device 2 of the above embodiment. Therefore, the same operation and effect as those of the above embodiment can be obtained by the brake device 2E having the same configuration.

However, the present modification differs from the above-described embodiment in that the scraper 7E is mounted between the back plate 6 and the electric actuator 100, as shown in fig. 13 and 14. In the present modification, the base portion 7a of the scraper 7E is fixed to the surface 6a of the back plate 6 and the lower case 112 by welding or a bonding member such as a screw or a bolt, for example. In this way, in the present modification, since the scraper 7E is provided so as to be sandwiched between the back plate 6 and the lower case 112, for example, the load input to the fins 7b can be released to the back plate 6 and the lower case 112 (metal member), respectively.

[ sixth modification ] A method for producing a semiconductor device

Fig. 15 is a rear view of a brake device 2F according to a sixth modification of the first embodiment, as viewed from the inside in the vehicle width direction, and fig. 16 is a side view of the brake device 2F as viewed from the rear side of the vehicle. The brake device 2F has the same configuration as the brake device 2 of the above embodiment. Therefore, the brake device 2F can obtain the same operation and effect as those of the above embodiment based on the same configuration.

However, the present modification is different from the above-described embodiment in that the width of the fin 7b in the circumferential direction in the scraper 7F is smaller than the width of the base 7a in the circumferential direction as shown in fig. 15 and 16. In the present modification, in order to ensure the fixing strength, the base portion 7a is configured to be wider than the fin 7b in the circumferential direction, and a plurality of welding portions 7k (welding portions) as fixing points are provided in a distributed manner in the circumferential direction. The fin 7b is provided at the center of the base 7a in the circumferential direction and is disposed on the vehicle upper side of the rotation center a × of the wheel 1. In the present modification, the scraper 7F has a symmetrical shape with respect to a virtual symmetrical plane 200 orthogonal to an axial direction passing through the center of the scraper 7F in the circumferential direction. Thus, the scrapers 7F can be shared by the wheels 1 of the left and right wheels of the vehicle. In the present modification, the base portion 7a is fixed to the surface 6a of the back plate 6 by spot welding, but the present invention is not limited to this example, and may be fixed by a coupling member such as a plurality of screws or bolts, for example.

As shown in fig. 15, a plurality of openings 7r are provided in the base portion 7a at portions between the fins 7b and the welding portions 7k, which are fixed points. The opening 7r is also referred to as a bulkhead, or the like. That is, the opening 7r reduces the weight of the scraper 7F. The openings 7r are provided on both the left and right sides of the virtual symmetrical plane 200. According to the present modification, for example, when the wheel 1 is detached from the vehicle, the load input to the fins 7b is easily dispersed to the plurality of welded portions 7k, and stress is less likely to concentrate on a specific welded portion 7k (fixed point), so that there is an advantage that durability with respect to fixation is improved as a result. That is, if the opening 7r is not present in the scraper 7F, the load input to the fin 7b is first linearly transmitted along the plate surface toward the nearest welded portion 7k among the plurality of welded portions 7k (fixed points), and stress tends to concentrate on the welded portion 7 k. In this regard, if the opening 7r is present as in the present embodiment, the load input to the fin 7b is transmitted while bypassing the opening 7r, and as a result, the load is likely to be dispersed in the plurality of welded portions 7 k. In addition, since the rigidity of the base portion 7a is reduced by the presence of the opening portion 7r, an external force applied to the fin 7b is buffered and transmitted to the welded portion 7k, which also contributes to suppression of stress concentration.

[ seventh modification ]

Fig. 17 is a rear view of a brake device 2G according to a seventh modification of the first embodiment, as viewed from the inside in the vehicle width direction. The brake device 2G has the same configuration as the brake device 2 of the above embodiment. Therefore, the brake device 2G can obtain the same operation and effect as those of the above embodiment based on the same configuration.

However, the present modification differs from the above-described embodiment in that the scraper 7G and the electric actuator 100 are arranged in front and rear with the rotation center a × of the wheel 1 interposed therebetween, as shown in fig. 17. In the present modification, the electric actuator 100 is located on the rear side of the rotation center a × and the scraper 7G is located on the front side of the rotation center a × on the contrary. According to such a configuration, for example, the following advantages can be obtained as compared with a case where both the scraper 7G and the electric actuator 100 are located on the front side of the rotation center a × or on the rear side of the rotation center a ×: that is, the front-rear weight balance of the back plate 6 is improved, or the attachment and detachment of the scraper 7G and the electric actuator 100 can be performed more easily. Further, even in the layout opposite to fig. 17, that is, the layout in which the electric actuator 100 is located on the front side of the rotation center a × and the scraper 7G is located on the rear side of the rotation center a ×, the same effect can be obtained.

[ second embodiment ]

Fig. 18 is a rear view of the brake device 2H according to the second embodiment as viewed from the inside in the vehicle width direction, and fig. 19 is a side view of the brake device 2H as viewed from the rear side of the vehicle. The brake device 2H has the same configuration as the brake device 2 of the above embodiment. Therefore, the brake device 2H can obtain the same operation and effect as those of the above embodiment based on the same configuration.

However, in the present embodiment, as shown in fig. 18 and 19, in the brake device 2H, instead of the scrapers 7 to 7G, barriers 7H1 and 7H2 are provided as guards. The barriers 7H1, 7H2 prevent an attached object (not shown) such as snow or ice, which is attached to the wheel 1 and rotates together with the wheel 1, from hitting the electric actuator 100.

The barriers 7H1 and 7H2 are fixed to the back panel 6 and are stationary with respect to the back panel 6. The barriers 7H1, 7H2 are made of, for example, a metal material such as a ferrous material. The barriers 7H1 and 7H2 are formed by, for example, press working and bending of a plate material. The barriers 7H1 and 7H2 are fixed to the vehicle width direction inner side surface 6a of the dash panel 6 by welding or a fastening member such as a screw or a bolt.

As shown in fig. 18, the entire barriers 7H1, 7H2 are disposed apart from the electric actuator 100 in the circumferential direction when viewed from the inside in the vehicle width direction (axial direction). The barrier 7H1 is separated from the electric actuator 100 in the counterclockwise direction about the rotation center a × and the barrier 7H2 is separated from the electric actuator 100 in the clockwise direction about the rotation center a ×.

As shown in fig. 19, the barriers 7H1, 7H2 extend from the back panel 6 in the axial direction (inward in the vehicle width direction). The vehicle-width-direction inner end portion 7n is located more inward in the vehicle width direction than the end portions 114a, 115 a.

As shown in fig. 18 and 19, the barriers 7H1 and 7H2 have convex portions 7m protruding in a direction intersecting the axial direction (vehicle width direction). The convex portion 7m constitutes a ridge line 7m1 extending in the axial direction and being sharp in a direction intersecting the axial direction. The convex portions 7m and the ridge lines 7m1 of the barrier 7H2 protrude in the circumferential direction. The ridge line 7m1 need not be completely along the axial direction, but may be inclined with respect to the axial direction. The ridge line 7m1 extends in a direction intersecting the surface 6a of the back sheet 6. The ridge 7m1 may also be referred to as an edge. The convex portion 7m may also be referred to as a bent portion or a protruding portion.

As described above, in the present embodiment, the brake device 2H includes the barriers 7H1 and 7H2 (guards), and the barriers 7H1 and 7H2 are examples of guards that prevent the attachments (not shown) that rotate together with the wheel 1 from hitting the electric actuator 100. That is, according to the present embodiment, it is possible to suppress the electric actuator 100 from being affected by the adhering matter adhering to the wheel 1.

In the present embodiment, the entire barriers 7H1 and 7H2 are circumferentially offset from the electric actuator 100. According to such a configuration, for example, a worker such as a person or a robot can move one of the barriers 7H1, 7H2 and the electric actuator 100 toward or from the mounting position of the other in the axial direction while the other is mounted, and therefore the following advantages are obtained: that is, the attachment and detachment of the barriers 7H1, 7H2 and the electric actuator 100 can be performed more easily, or the degree of freedom in the assembly process of the brake device 2 including the barriers 7H1, 7H2 and the electric actuator 100 can be increased, and the labor and cost required for the manufacture and maintenance of the brake device 2 can be reduced.

In the present embodiment, the barriers 7H1 and 7H2 have the convex portions 7m protruding in the direction intersecting the axial direction. According to this structure, for example, the section modulus is higher than that of a flat barrier without the convex portion 7m, and the rigidity and strength are higher, so that the barriers 7H1 and 7H2 are less likely to be deformed or broken even when pressed against an attached matter rotating together with the wheel 1.

In the present embodiment, the convex portion 7m protrudes in a direction away from the end portions 114a and 115 a. If the barriers 7H1, 7H2 have recesses that are recessed in the direction toward the end portions 114a, 115a, there is a possibility that the attachments that rotate together with the wheel 1 will accumulate in the recesses. In this regard, the convex portion 7m protruding in the direction away from the end portions 114a and 115a can suppress the deposition of the attachments that rotate together with the wheel 1 on the barriers 7H1 and 7H2, for example.

In addition, the barrier 7H2 has a ridge line 7m1 extending in the axial direction and protruding in the circumferential direction. The attached matter that rotates together with the wheel 1 can be cut by the ridge line 7m 1. Therefore, according to this configuration, for example, the barrier 7H2 can function as a scraper having the ridge line 7m1 as an edge, and thus the electric actuator 100 can be further prevented from being affected by an attachment attached to the wheel 1. The outer surface (end surface) of the ridge line 7m1 may be sharp, or may be a curved surface having a relatively small radius of curvature.

(eighth modification and ninth modification)

Fig. 20 and 21 are rear views of the braking devices 2I and 2J of the eighth and ninth modified examples of the second embodiment, as viewed from the inside in the vehicle width direction. As in the case of the barrier 7I shown in fig. 20 or the barrier 7J shown in fig. 21, the cross-sectional shape of the projection 7m may be a curved shape, a U-shape, or another shape not shown. The specifications of the braking devices 2I and 2J other than the cross-sectional shapes of the barriers 7I and 7J and the convex portion 7m are the same as those of the second embodiment. According to this structure, for example, the section modulus is higher than that of a flat barrier without the convex portion 7m, and the rigidity and strength are higher, so that the barrier is less likely to be deformed or damaged even when pressed against an attached object rotating together with the wheel 1. Although not shown, the barriers 7I and 7J may be arranged only on one side in the circumferential direction of the electric actuator 100.

Although the embodiment and the modified examples of the present invention have been described above, the embodiment and the modified examples are only examples and are not intended to limit the scope of the present invention. The above-described embodiment and the modification can be implemented in other various forms, and various omissions, substitutions, combinations, and alterations can be made without departing from the spirit of the invention. Further, the structure, the shape, and other specifications (structure, type, direction, form, size, length, width, thickness, height, number, arrangement, position, material, and the like) can be appropriately changed and implemented.

For example, the scrapers are provided only on one side in the circumferential direction of the electric actuator, but the scrapers are not limited thereto, and may be provided on one side and the other side in the circumferential direction of the electric actuator.

The invention of the embodiment may have the following technical features.

【8】

In the brake device, the fin covers at least a part of an upper side of the electric actuator in the vehicle.

【9】

The fin is disposed above an uppermost second portion of the electric actuator.

【10】

The base is fixed to the back plate.

【11】

The convex portion has a ridge extending in the axial direction and protruding in the circumferential direction.

Claims (7)

1. A brake device is provided with:

a braking member that brakes a drum rotor that rotates integrally with a wheel by being pressed against the drum rotor;

a backing plate supporting the brake member;

an electric actuator provided to the back plate and configured to actuate the brake member; and

and a guard that is provided at a position where the guard is entirely offset in the circumferential direction of the wheel with respect to a first portion of the electric actuator that is closest to an inner circumferential surface of a circumferential wall of the wheel, and that is stationary with respect to the back plate.

2. The braking device according to claim 1,

the guard includes two guards disposed on both sides in the circumferential direction with respect to the first portion.

3. The braking device according to claim 1 or 2,

the protector is a barrier having a convex portion protruding in the circumferential direction.

4. The braking device according to any one of claims 1 to 3,

the guard is a scraper including a fin having an edge that is one end in the circumferential direction and extends in the vehicle width direction so as to intersect the circumferential direction, and an outer surface that faces the inner peripheral surface with a gap therebetween, and a base that supports the fin.

5. The braking device according to claim 4,

the fin has a virtual rotation body of the fin around a rotation center of the wheel between the inner peripheral surface and the first portion or at the same position as the first portion in a radial direction of the wheel.

6. The braking device according to claim 5,

the tip end portion of the virtual rotating body on the inside in the vehicle width direction is aligned with an end portion of the peripheral wall on the inside in the vehicle width direction and an outer portion of the first portion that is located further to the outside in the vehicle width direction in the radial direction of the wheel, or is located on the inside in the vehicle width direction than the outer portion.

7. The braking device according to any one of claims 4 to 6,

the fin is inclined with respect to a radial direction of the wheel and an axial direction of the wheel so as to be closer to the inner circumferential surface as going from the base portion to an inner side in the vehicle width direction.

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