Low-inherent-frequency ventilated brake disc applied to novel surface cleaning equipment

Abstract

The invention discloses a low-inherent-frequency ventilation type brake disc applied to novel surface cleaning equipment, which comprises a disc cap, an outer side friction disc, an inner side friction disc and a series of cylindrical ventilation ribs used for connecting the two friction discs, the outer side friction disc is connected with the disc cap, and the inner side friction disc is connected with the disc cap. The outer side friction disc and the inner side friction disc are connected through the ventilation ribs, the ventilation ribs are evenly distributed in the circumferential direction according to rows, each row of ventilation ribs is composed of a plurality of cylinders, the intervals of the ventilation ribs in the direction away from the disc cap are gradually increased, the tail ends of the ventilation ribs are narrowed, and the ventilation ribs are evenly distributed in the circumferential direction in a radial shape. Meanwhile, the inherent frequency can be reduced, and noise is reduced. According to the ventilation type brake disc, the lowest inherent frequency of the ventilation type brake disc is made to be about 1000 Hz mainly by changing the shapes and the sizes of the ventilation ribs, and noise and brake scream generated when the brake disc is subjected to point contact type brake cleaning are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of brake equipment, in particular to a low-natural-frequency ventilated brake disc used in novel surface cleaning equipment. Background Art

[0002] Compared with traditional surface cleaning equipment, the noise level of new surface cleaning equipment has been greatly reduced, making the brake system noise problem more prominent. When the new surface cleaning equipment performs touch-type brake cleaning, the brake system will produce undesirable noise. The frequency of this noise ranges from 1 kHz to 20,000 Hz, which brings a very poor experience in terms of comfort and subjective feeling of the operator. Braking noise, especially brake squeal, is usually related to the dynamic characteristics of the braking system, including the vibration and interaction of components such as brake discs, brake pads, and calipers. Lowering the natural frequency of the brake disc can reduce the resonant brake squeal with other components of the system, thereby reducing noise.

[0003] The design and placement of ventilation ribs in existing ventilated brake discs are primarily focused on heat dissipation and processability, without considering brake system noise. Therefore, a ventilated brake disc with improved ventilation for heat dissipation, a lower natural frequency, and reduced noise is needed. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art by providing a low-natural-frequency ventilated brake disc for use in novel surface cleaning equipment. The disc exhibits excellent ventilation for heat dissipation, while also reducing its natural frequency and noise. By modifying the shape and size of the ventilation ribs, the present invention achieves a minimum natural frequency of approximately 1000 Hz, thereby reducing the noise and brake squeal generated during contact-type brake cleaning.

[0005] The present invention also provides a low-natural frequency ventilated brake disc having the above-mentioned function for use in new surface cleaning equipment, comprising: a disc cap, an outer friction disc, an inner friction disc and a series of cylindrical ventilation ribs for connecting the two friction discs, the outer friction disc being connected to the disc cap, the outer friction disc and the inner friction disc being connected through the ventilation ribs, the ventilation ribs being evenly arranged circumferentially in rows, each row of the ventilation ribs being composed of several cylinders, the spacing between the ventilation ribs in each row gradually widening in the direction away from the disc cap and narrowing at the end, and being radially and circumferentially evenly distributed.

[0006] According to the present invention, a low-natural-frequency ventilated brake disc for use in new surface cleaning equipment is provided, wherein the ventilation ribs are cylinders with a diameter of 5-10 mm, a gap is left between two adjacent cylinders, and the gaps in each column are evenly distributed with a spacing of 5-10 mm.

[0007] According to a low natural frequency ventilated brake disc used in a new surface cleaning device provided by the present invention, the ventilation ribs and the inner friction disc can be cast integrally, and the ventilation ribs and the outer friction disc can be cast integrally.

[0008] According to the present invention, a low-natural-frequency ventilated brake disc for use in a novel surface cleaning device is provided, wherein the ventilation ribs are structured in a scattered manner to connect the friction discs on both sides.

[0009] According to a low natural frequency ventilated brake disc for a novel surface cleaning device provided by the present invention, the ventilation ribs are evenly arranged in rows along the circumferential direction, and the number of rows is between 25 and 35.

[0010] According to the low natural frequency ventilated brake disc for novel surface cleaning equipment provided by the present invention, the ventilation ribs are evenly arranged in rows along the circumferential direction, and the number of cylindrical ventilation ribs in each row is 6-10.

[0011] According to a low natural frequency ventilated brake disc for a novel surface cleaning device provided by the present invention, the surface of the ventilation ribs is provided with a thermal barrier coating or a ceramic coating.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) In the present invention, the ventilation ribs are arranged so as to gradually widen in the direction away from the disk cap and narrow at the end, which can increase the heat dissipation surface area and flow area of the ventilation ribs.

[0014] (2) In the present invention, each row of ventilation ribs contains an independent cylinder, which increases heat dissipation while reducing the natural frequency of the brake disc, thereby reducing the noise of the braking system.

[0015] (3) In the present invention, the cylinder is used as the ventilation rib, which increases the gap and reduces the mass of the brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the brake disc structure of the present invention;

[0018] Figure 2 This is an exploded view of the brake disc structure of the present invention;

[0019] Figure 3 Schematic diagram of the ventilation rib structure in the present invention;

[0020] Figure 4This is a modal simulation diagram of the brake disc in the present invention.

[0021] Figure 5 This is the modal simulation diagram of a conventional straight-bar brake disc.

[0022] Legend: 1. Disc cap; 2. Bolt hole; 3. Outer friction disc; 4. Ventilation rib; 5. Inner friction disc. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0024] This embodiment provides a low natural frequency ventilated brake disc for use in new surface cleaning equipment, which increases heat dissipation and reduces its natural frequency by changing the shape and distribution density of the ventilation ribs. Figure 1 As shown, it includes a disc cap 1, a bolt hole 2, an outer friction disc 3, a plurality of cylindrical ventilation ribs 4 and an inner friction disc 5. Figure 2 As shown, the outer friction disc 3 is connected to the disc cap 1, which protrudes toward the outside of the vehicle. Bolt holes 2 are provided on the disc cap 1, and the disc cap 1 is connected to the rim via bolts passing through the bolt holes 2. The outer friction disc 3 and the inner friction disc 5 are connected by ventilation ribs 4.

[0025] like Figure 2 、 3 As shown, the ventilation ribs 4 are cylindrical structures. Specifically, multiple cylindrical rib blocks are evenly distributed in rows between the outer friction disc 3 and the inner friction disc 5. The radial spacing of the cylindrical rib blocks in each row is uniform. This arrangement is a mature casting process. The number of ventilation rib rows is designed based on the overall dimensions of the brake disc, with a recommended value of 25-35 rows. The number of cylindrical ventilation ribs in each row is also designed based on the overall dimensions of the brake disc, with a recommended value of 6-10.

[0026] The specific implementation is to form the Figure 1 As shown in the ventilated brake disc, there is a certain gap between the cylindrical ventilation ribs, which is conducive to ventilation and heat dissipation.

[0027] like Figure 4 As shown, the natural frequency of the ventilated brake disc of the present invention is 1065.3 Hz under the following specific case conditions.

[0028] 1) The brake disc has a thickness of 32 mm, a disc cap height of 32 mm, a right-angled neck, an outer diameter of 320 mm, and an inner diameter of 130 mm.

[0029] 2) The diameter of the cylindrical ventilation rib is 7mm and the length is 12mm.

[0030] 3) The ventilation ribs are evenly arranged in rows along the circumference, with a total of 27 rows, and 6 cylindrical ventilation ribs in each row.

[0031] Under the same conditions, the natural frequency of ordinary straight ventilation ribs is 1222.6Hz. Figure 5 The natural frequency of the ventilation ribs of the present invention is reduced by 14.8% in this specific embodiment.

[0032] In a preferred embodiment, the brake disc can be made of a material with high strength and good thermal conductivity, such as aluminum alloy, carbon ceramic composite material or titanium alloy. The surface of the ventilation rib can be provided with a surface coating such as a thermal barrier coating or a ceramic coating. The thermal barrier coating has high radiation reflection performance and can effectively reduce heat absorption; the ceramic coating can increase the thermal barrier properties of the surface, reduce heat conduction, and improve the heat dissipation effect of the brake disc.

[0033] Compared with the existing ventilation disc, under the condition of the same number of ventilation ribs, the ventilation rib structure of the present invention has a larger gap, which is more conducive to the circulation and exchange of cooling air. In addition, the present invention can significantly reduce the natural frequency of the brake disc and reduce the noise of the braking system.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. A low natural frequency ventilated brake disc used in a new surface cleaning device, characterized in that: include: A disc cap (1), an outer friction disc (3), an inner friction disc (5) and a series of cylindrical ventilation ribs (4) for connecting the two friction discs, wherein the outer friction disc (3) is connected to the disc cap (1), and the outer friction disc (3) and the inner friction disc (5) are connected via the ventilation ribs (4). The ventilation ribs (4) are evenly arranged in rows along the circumference, and each row of the ventilation ribs (4) is composed of a plurality of cylinders. The spacing of the ventilation ribs (4) in each row gradually widens in the direction away from the disc cap (1) and narrows at the end, and is radially and evenly distributed in the circumference.

2. A ventilated brake disc with a low natural frequency according to claim 1, characterized in that: The ventilation ribs (4) are cylindrical with a diameter of 5-10 mm. There is a gap between two adjacent cylinders, and the gaps in each row are evenly distributed with a spacing of 5-10 mm.

3. The low natural frequency ventilated brake disc used in a new surface cleaning device according to claim 1, characterized in that: The ventilation rib (4) and the inner friction disc (5) can be cast in one piece, and the ventilation rib (4) and the outer friction disc (3) can be cast in one piece.

4. The low natural frequency ventilated brake disc used in a new surface cleaning device according to claim 1, characterized in that: The ventilation ribs (4) are structured in a scattered manner to connect the friction discs on both sides.

5. The low natural frequency ventilated brake disc used in a new surface cleaning device according to claim 1, characterized in that: The ventilation ribs (4) are evenly arranged in rows along the circumferential direction, and the number of rows is between 25 and 35.

6. The low natural frequency ventilated brake disc used in a new surface cleaning device according to claim 1, characterized in that: The ventilation ribs (4) are evenly arranged in rows along the circumferential direction, and the number of the cylindrical ventilation ribs in each row is 6-10.

7. The low natural frequency ventilated brake disc used in a new surface cleaning device according to claim 1, characterized in that: The surface of the ventilation rib (4) is provided with a thermal barrier coating or a ceramic coating.

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