Fitting structure of vibration control component and brake master cylinder unit

Abstract

To provide a fitting structure of a vibration control component and a brake master cylinder unit which makes it possible to achieve reduction and miniaturization of the number of components while achieving both of vibration suppression effect and high rigidity.SOLUTION: In a vibration control component 100 which is arranged between a brake master cylinder unit 10 and a dash panel 20, it comprises a plate-like member 110 made of a metal and a first elastic body 120 which is provided in one piece on the plate-like member 110 and comes into contact with both of the brake master cylinder unit 10 and the dash panel 20. A first insertion hole 111 through which a transmission portion 12 passes, a first collar 112 and a second insertion hole 113 are provided on the plate-like members 110 and at the same time it comprises a second collar 130 which includes a cylindrical part 131 and a flange part 132 and a second elastic body 140 which is provided between the plate-like member 110 and a flange part 132 and has a hardness greater than the first elastic body 120.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a vibration-isolating component and a mounting structure for a brake master cylinder unit. [Background technology]

[0002] Conventionally, in a mounting structure for a brake master cylinder unit having an electric motor to an automobile dash panel, there is known a technology that aims to achieve both vibration isolation of the dash panel and ensuring high rigidity against the brake pedal depression force (see Patent Document 1). According to this technology, by adopting a structure in which two metal plate-shaped members and three vibration-isolating rubbers are arranged alternately, it is possible to achieve both the vibration isolation and high rigidity.

[0003] However, this technology requires a large number of parts, an increased thickness, and requires long stud bolts, which increases the size of the vulcanization mold used to manufacture the product and increases costs. Therefore, there is still room for improvement. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-30847 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a vibration-damping part and a mounting structure for a brake master cylinder unit that can reduce the number of parts and achieve size reduction while achieving both vibration suppression effect and high rigidity. [Means for solving the problem]

[0006] The present invention employs the following means to solve the above problems.

[0007] The vibration-damping component of the present invention comprises: A vibration-damping component disposed between a brake master cylinder unit having an electric motor and a dash panel of an automobile, a metal plate-shaped member; a first elastic body that is integrally provided on the plate-like member and that contacts both the brake master cylinder unit and the dash panel; Equipped with The plate-like member is provided with a first insertion hole through which a transmission portion that is pushed down in response to depression of the brake pedal to transmit force to the brake master cylinder unit is inserted, a first collar having an internal thread that is threaded with an external thread of a first screw part for fixing a support member that supports the brake pedal to the dash panel, and a second insertion hole through which a shank of a second screw part for fixing the plate-like member to the brake master cylinder unit is inserted, a second collar having a cylindrical portion into which the shank of the second screw fastener is inserted and which is inserted into the second insertion hole, and a flange portion provided at an end of the cylindrical portion; a second elastic body provided between the plate-like member and the flange portion and having a hardness greater than that of the first elastic body; The present invention is characterized by comprising:

[0008] According to the present invention, since the first elastic body is provided in contact with both the brake master cylinder unit and the dash panel, it is possible to suppress the vibration of the brake master cylinder unit from being transmitted to the dash panel. The force is transmitted from the starter cylinder unit to the second threaded part, and from the second threaded part through the second collar and the second elastic body to the plate-like member. According to the present invention, the second elastic body has a high hardness, so high rigidity is obtained against the brake pedal depression force, and since there is no contact between the metals, a vibration suppression effect is also achieved.

[0009] The second elastic body may be provided integrally with the second collar.

[0010] The first elastic body is preferably made of a rubber material having a hardness of 40 HS or more and 50 HS or less, and the second elastic body is preferably made of a rubber material having a hardness of 70 HS or more and 80 HS or less.

[0011] The mounting structure of the present invention comprises: A mounting structure for a brake master cylinder unit that is mounted on a dash panel of an automobile and has an electric motor, comprising: The above vibration-isolating parts, a fixed plate provided at a distance from the dash panel and to which the support member is fixed; a metal cylindrical spacer into which a shank of a first screw fastener is inserted, one end of which contacts the dash panel and the other end of which contacts the fixed plate; The present invention is characterized by comprising:

[0012] The above configurations may be combined as much as possible. [Effects of the Invention]

[0013] As described above, according to the present invention, it is possible to achieve both vibration suppression effect and high rigidity, while reducing the number of parts and achieving size reduction. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a plan view showing an outline of a mounting structure according to an embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing an outline of the mounting structure according to the embodiment of the present invention. [Figure 3] FIG. 3 is a schematic diagram of a vibration-isolating component according to an embodiment of the present invention. [Figure 4] FIG. 4 is a schematic cross-sectional view of a mounting structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The following detailed description of the present invention will be given by way of example with reference to the accompanying drawings, although the dimensions, materials, shapes, relative positions, etc. of the components described in the examples are not intended to limit the scope of the present invention unless otherwise specified.

[0016] (Example) 1 to 4, a vibration-damping component and a mounting structure for a brake master cylinder unit according to an embodiment of the present invention will be described. FIG. 1 is a plan view showing an outline of the mounting structure according to an embodiment of the present invention. FIG. 2 is a front view (viewed in the V direction in FIG. 1) showing an outline of the mounting structure according to an embodiment of the present invention, with the dash panel shown in perspective and only the location of the electric motor indicated by a dotted line. FIG. 3 is a schematic diagram of a vibration-damping component according to an embodiment of the present invention, where (a) is a plan view, (b) is an AA cross-sectional view in (a), and (c) is a BB cross-sectional view in (a). FIG. 4 is a schematic cross-sectional view of a mounting structure according to an embodiment of the present invention, with the vibration-damping component in (a) corresponding to the AA cross-sectional view and the vibration-damping component in (b) corresponding to the BB cross-sectional view. Note that in FIGS. 3 and 4, depth lines are omitted as appropriate, and only cross-sectional surfaces are shown.

[0017] <Overview of mounting structure> An overview of a vibration-damping component and a mounting structure for a brake master cylinder unit according to an embodiment of the present invention will be described with reference to Figures 1 and 2. A brake master cylinder unit 10 is disposed in front of a dash panel 20 of an automobile, and a brake unit 30 is disposed inside the dash panel 20. With a vibration-damping component 100 disposed between the brake master cylinder unit 10 and the dash panel 20, the brake master cylinder unit 10 and the brake unit 30 are mounted to the dash panel 20.

[0018] The brake master cylinder unit 10 is equipped with an electric motor 11. This electric motor 11 has the function of increasing the hydraulic pressure in the cylinder of the brake master cylinder unit 10 in accordance with the brake pedal depression force. The electric motor 11 amplifies the hydraulic pressure output by the brake master cylinder unit 10, so that a large hydraulic pressure can be output with a small depression force. Therefore, a desired braking force can be obtained even with a small depression force.

[0019] The brake unit 30 includes a brake pedal composed of a pedal 31 and a pedal arm 32, and a pair of support members 33 that support the brake pedal. The brake pedal is supported by a shaft member 34 so as to be able to swing relative to the pair of support members 33. The brake unit 30 also includes a first pressing member 35 fixed to the brake master cylinder unit 10, and a second pressing member 36 that presses the first pressing member 35 when the brake pedal is depressed. The first pressing member 35 and the second pressing member 36 are fixed, and the pedal arm 32 is pivotally supported by a shaft member 37 so as to be able to swing relative to the second pressing member 36. With the above configuration, when the brake pedal is depressed, the brake master cylinder unit 10 is pressed from the pedal arm 32 via the shaft member 37, the second pressing member 36, and the first pressing member 35. The protruding portion of the brake master cylinder unit 10, to whose tip the first pressing member 35 is fixed, can be called the transmission portion 12, which is pressed down in response to depression of the brake pedal and transmits force to the brake master cylinder unit 10.

[0020] The brake unit 30 configured as described above is fixed to the dash panel 20 by a first bolt B1 serving as a first threaded fastener. The vibration-proof component 100 is fixed to the brake master cylinder unit 10 by a second bolt B2 serving as a second threaded fastener.

[0021] <Vibration isolation parts> 3 and 4, a vibration-damping component 100 disposed between a brake master cylinder unit 10 having an electric motor 11 and a dash panel 20 of an automobile will be described. The vibration-damping component 100 includes a metal plate-shaped member 110 and a first elastic body 120 integrally provided with the plate-shaped member 110. The plate-shaped member 110 and the first elastic body 120 can be integrally formed by molding the first elastic body 120 by insert molding using the plate-shaped member 110 as an insert component. The first elastic body 120 is preferably formed from a rubber material having a hardness of 40 HS or more and 50 HS or less. The first elastic body 120 is disposed so as to contact both the brake master cylinder unit 10 and the dash panel 20. In addition, in Figures 3(b) and (c), the vibration-damping part 100 is arranged between the brake master cylinder unit 10 and the dash panel 20 so that the upper surface 121 of the first elastic body 120 contacts the dash panel 20 and the lower surface 122 contacts the brake master cylinder unit 10.

[0022] The plate-like member 110 is provided with a first insertion hole 111 through which a transmission part 12 is inserted, which is pushed down in response to depression of the brake pedal and transmits force to the brake master cylinder unit 10. In this embodiment, the inner peripheral surface of the first insertion hole 111 is covered with a first elastic body 120. The plate-like member 110 also has a support member 3 for supporting the brake pedal. The plate-shaped member 110 includes a first collar 112 having a female thread 112a that screws onto the male thread of a first bolt B1 for fixing the plate-shaped member 110 to the dash panel 20. The first collar 112 is a metal member that is formed integrally with the plate-shaped member 110. For example, it can be fixed by welding or the like. The plate-shaped member 110 further includes a second insertion hole 113 through which the shank of a second bolt B2 for fixing the plate-shaped member 110 to the brake master cylinder unit 10 is inserted. The vibration-proof component 100 is fixed to the brake master cylinder unit 10 by fixing the plate-shaped member 110 with the second bolt B2.

[0023] The vibration-proof component 100 also includes a metal second collar 130 having a cylindrical portion 131 through which the shank of the second bolt B2 is inserted and a flange portion 132 provided at the end of the cylindrical portion 131. The second collar 130 is held in place by fitting the flange portion 132 into a hole provided in the first elastic body 120 with the cylindrical portion 131 inserted into the second insertion hole 113. That is, the second collar 130 can be held by the first elastic body 120 by setting the outer diameter of the flange portion 132 to be larger than the inner diameter of the hole provided in the first elastic body 120. More specifically, as shown in FIG. 3(b), the second collar 130 can be held by the first elastic body 120 by inserting the second collar 130 in the direction of the arrow.

[0024] Furthermore, the vibration-proof component 100 includes a second elastic body 140 provided between the plate-like member 110 and the flange portion 132. This second elastic body 140 is provided integrally with the second collar 130. For example, the second elastic body 140 can be provided integrally with the second collar 130 by vulcanization molding. Furthermore, this second elastic body 140 is made of a material that has a higher hardness than the first elastic body 120. More specifically, it is preferable that the second elastic body 140 be made of a rubber material with a hardness of 70 HS or more and 80 HS or less.

[0025] <Mounting structure details> In particular, with reference to FIG. 4, the vibration-proof component and the mounting structure for the brake master cylinder unit according to the embodiment of the present invention will be described in detail.

[0026] First, the mounting structure of the vibration-damping part 100 and the brake master cylinder unit 10 will be described. With the vibration-damping part 100 and the brake master cylinder unit 10 aligned with respect to the dash panel 20, they are fixed by screwing a second bolt B2 into a female thread 13 formed in the brake master cylinder unit 10. A through hole 22 is formed in the dash panel 20, and the head of the second bolt B2 is disposed in the through hole 22, so that the head contacts a flange portion 132 of the second collar 130. The shank B2a of the second bolt B2 is screwed into the female thread 13 while passing through the interior of the cylindrical portion 131 of the second collar 130.

[0027] Next, the mounting structure between dash panel 20 and brake unit 30 will be described. In mounting structure 1 according to this embodiment, plate-shaped spacer 40, which serves as a fixed plate to which support member 33 of brake unit 30 is fixed, is provided at a distance from dash panel 20. Mounting structure 1 also includes a plurality of metallic cylindrical spacers 50. Each cylindrical spacer 50 is arranged so that one end contacts dash panel 20 and the other end contacts plate-shaped spacer 40, and shank B1a of first bolt B1 is inserted into the cylindrical spacer.

[0028] With the plurality of cylindrical spacers 50, plate-like spacers 40, and support member 33 aligned with dash panel 20, they are fixed by screwing first bolt B1 into female thread 112a of first collar 112 of vibration-damping component 100. Note that dash panel 20 has through-hole 21, and shank B1a of first bolt B1 passes through this through-hole 21 and is screwed into female thread 112a.

[0029] <Advantages of the vibration isolation parts and brake master cylinder unit mounting structure> In particular, with reference to FIG. 4, advantages of the vibration-proof component and the mounting structure for the brake master cylinder unit according to this embodiment will be described.

[0030] The solid arrows in Figure 4 indicate the flow of force transmission when the brake pedal is depressed. When the brake pedal is depressed, as described above, the brake master cylinder unit 10 is pressed by the transmission part 12, and force is transmitted to the second bolt B2 screwed to the brake master cylinder unit 10. As a result, force is transmitted from the head of the second bolt B2 through the second collar 130 and the second elastic body 140 to the plate-like member 110. The flow of transmission of the reaction force due to such force is indicated by the dotted arrows in Figure 4. When force is transmitted to the plate-like member 110 as described above, the reaction force is transmitted from the first collar 112 fixed to the plate-like member 110 to the brake unit 30 via the first bolt B1, the cylindrical spacer 50, etc.

[0031] As described above, the transmission path of the brake pedal depression force from the brake unit 30 until it returns to the brake unit 30 as a reaction force is configured to pass through members made of a highly rigid material, with the exception of the second elastic body 140. As described above, although the second elastic body 140 is an elastic body, it has a high hardness, so that high rigidity can be obtained over the entire transmission path of the depression force. Therefore, it is possible to prevent the brake master cylinder unit 10 from moving significantly when the driver depresses the brake pedal, and to prevent the driver from feeling uncomfortable.

[0032] Furthermore, according to this embodiment, the first elastic body 120 is provided in contact with both the brake master cylinder unit 10 and the dash panel 20, thereby suppressing vibrations from the brake master cylinder unit 10 from being transmitted to the dash panel 20. The provision of the second elastic body 140 also suppresses contact between the metals (the plate-like member 110 and the second collar 130). In this way, the second elastic body 140 provides high rigidity as described above, while also providing a vibration suppression effect since the metals do not come into contact with each other.

[0033] As described above, the vibration-damping part 100 and the mounting structure of the brake master cylinder unit 10 according to this embodiment achieve both vibration suppression effect and high rigidity, while reducing the number of parts and making the device smaller compared to the technology disclosed in Patent Document 1. [Explanation of symbols]

[0034] 1: Mounting structure 10: Brake master cylinder unit 11: Electric motor 12: Transmission part 13: Female thread 20: Dash panel 21, 22: Through holes 30: Brake unit 31: Pedal 32: Pedal arm 33: Support member 34: Shaft member 35: First pressing member 36: Second pressing member 37: Shaft member 40: Plate-shaped spacer 50: Cylindrical spacer 100: Vibration isolation parts 110: Plate-shaped member 111: First insertion hole 112: 1st color 112a: Female thread 113: Second insertion hole 120: First elastic body 121:Top surface 122: Bottom surface 130: Second color 131:Cylinder part 132: Flange part 140: Second elastic body B1: First bolt B2: Second bolt

Claims

1. A vibration-damping component disposed between a brake master cylinder unit having an electric motor and a dash panel of an automobile, a metal plate-shaped member; a first elastic body that is integrally provided on the plate-like member and that contacts both the brake master cylinder unit and the dash panel; Equipped with The plate-like member is provided with a first insertion hole through which a transmission portion that is pushed down in response to depression of the brake pedal to transmit force to the brake master cylinder unit is inserted, a first collar having an internal thread that is threaded with an external thread of a first screw part for fixing a support member that supports the brake pedal to the dash panel, and a second insertion hole through which a shank of a second screw part for fixing the plate-like member to the brake master cylinder unit is inserted, a second collar having a cylindrical portion into which the shank of the second screw fastener is inserted and which is inserted into the second insertion hole, and a flange portion provided at an end of the cylindrical portion; a second elastic body provided between the plate-like member and the flange portion and having a hardness greater than that of the first elastic body; A vibration-damping component comprising:

2. 2. The vibration-isolating component according to claim 1, wherein the second elastic body is integrally provided with the second collar.

3. 2. The vibration-damping component according to claim 1, wherein the first elastic body is made of a rubber material having a hardness of 40 HS or more and 50 HS or less, and the second elastic body is made of a rubber material having a hardness of 70 HS or more and 80 HS or less.

4. A mounting structure for a brake master cylinder unit that is mounted on a dash panel of an automobile and has an electric motor, comprising: The vibration-isolating component according to claim 1, 2 or 3; a fixed plate provided at a distance from the dash panel and to which the support member is fixed; a metal cylindrical spacer into which a shank of a first screw fastener is inserted, one end of which contacts the dash panel and the other end of which contacts the fixed plate; A mounting structure comprising:

Images