CN215144469U - Brake disc psammitolite and brake disc mould - Google Patents

Abstract

The utility model provides a brake disc psammitolite and brake disc mould relates to brake disc manufacturing technical field, has solved the poor problem of the brake disc mechanical properties that the casting obtained among the correlation technique. The brake disc sand core comprises a sand core body and a middle circular table which are connected with each other, the sand core body is of an annular structure, and the outer peripheral edge of the middle circular table is connected to the inner peripheral edge of the sand core body. Be provided with a plurality of sand core holes on the psammitolite body, a plurality of sand core holes are along the circumference interval distribution of psammitolite body. The utility model provides a brake disc mould includes above-mentioned brake disc psammitolite. The utility model provides the high mechanical properties of brake disc guarantees that the brake disc can satisfy in high-speed train's braking demand.

Description

Brake disc psammitolite and brake disc mould

Technical Field

The utility model relates to a technical field is made to the high-speed train brake disc, especially relates to a brake disc psammitolite and brake disc mould.

Background

The brake disc is an important part in a brake system of a high-speed train, and the quality and the performance of the brake disc directly influence the safe operation of a high-speed rail.

At the present stage, the brake disc is mostly obtained by casting split sand cores, namely, the brake disc sand core is composed of four split sand cores, each split sand core is of a fan-shaped structure, the circumferential angle of each fan-shaped sand core is 90 degrees, and in the casting process, the four split sand cores are spliced into the casting sand core of the brake disc and then casting is carried out.

However, the brake disc cast by the split sand core casting method has the problems that sand mold sharp corners, sand falling and the like are easy to occur at the splicing position of the split sand cores, the mechanical property of the brake disc sand core obtained by casting is poor, and the brake disc cannot meet the use requirement of a high-speed train.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a brake disc psammitolite and brake disc mould, wherein, the brake disc psammitolite adopts integral type psammitolite structure, has improved the mechanical properties of brake disc, can satisfy the braking demand among the high-speed train.

In order to realize the above-mentioned purpose, first aspect, the utility model provides a brake disc psammitolite, including interconnect's psammitolite body and middle round platform, the psammitolite body is the loop configuration, and the outer peripheral edge of middle round platform is connected on the internal periphery of psammitolite body.

Be provided with a plurality of sand core holes on the psammitolite body, a plurality of sand core holes are along the circumference interval distribution of psammitolite body.

In the above brake disc sand core, optionally, the sand core hole is a slotted hole.

In the brake disc sand core, optionally, the sand core holes include first sand core holes, the first sand core holes are linear, and the first sand core holes extend along the radial direction of the sand core body.

In the brake disc sand core, optionally, the sand core hole includes a second sand core hole, and the second sand core hole includes a first straight line extension section, a middle section, and a second straight line extension section that are connected in sequence.

The cross-sectional area of the intermediate section is greater than the cross-sectional area of the first linearly extending section and the cross-sectional area of the second linearly extending section.

In the brake disc, optionally, the sand core holes include third sand core holes, the third sand core holes are distributed on two opposite sides of the second sand core holes, the third sand core holes include a third straight line extension section, an arc line extension section and a fourth straight line extension section which are sequentially connected, and the arc line extension section and the middle section are oppositely arranged.

The arc extension segment is curved toward a side facing away from the intermediate segment.

In the brake disc sand core, optionally, the sand core hole includes a fourth sand core hole, the fourth sand core hole includes a fifth straight extension section, a transition section, a first branch extension section and a second branch extension section, the fifth straight extension section is connected to one side of the transition section close to the middle circular truncated cone, and the first branch extension section and the second branch extension section are connected to one side of the transition section far away from the middle circular truncated cone.

In the brake disc sand core, optionally, the sand core holes are round holes, and the distance between every two adjacent sand core holes is equal.

The distance between two adjacent sand core holes ranges from 30mm to 35mm, and the diameter of the sand core hole ranges from 20mm to 25 mm.

In the brake disc sand core, optionally, a connecting sand core hole is formed in one side, close to the middle circular truncated cone, of the sand core body, and at least part of the connecting sand core hole extends into the middle circular truncated cone;

the cross-sectional area of the connecting sand core hole is increased from one side of the middle round platform to one side of the sand core body and then is reduced.

In the brake disc sand core, optionally, the middle circular truncated cone and the sand core body are integrally formed.

In the direction perpendicular to the sand core body, the extension length of the middle round platform is greater than that of the sand core body.

The utility model provides a brake disc psammitolite, through the brake disc psammitolite that sets up the integral type, it is inaccurate to have avoided adopting split type psammitolite casting brake disc and each components of a whole that can function independently psammitolite erection site among the correlation technique in the casting process that leads to, components of a whole that can function independently psammitolite concatenation department has burr and sand mould closed angle, the problem that falls sand and precision difference appears in the casting process, the stress concentration phenomenon of the braking CD in the combination department of components of a whole that can function independently psammitolite after having avoided the casting, thereby the inside mechanical strength stability of foundry goods has been improved, the mechanical properties of the brake disc that the casting obtained has been improved. The brake disc is cast through the brake disc sand core formed in an integrated mode, and the fact and position tolerance in the casting process of the brake disc is guaranteed to meet the use requirement. When designing the brake disc psammitolite, the user demand according to the brake disc sets up the shape in sand core hole and the distribution of sand core hole on the psammitolite body, guarantees the utility model provides a processing method of brake disc psammitolite can be applicable to the casting of the brake disc of multiple working method, and then has improved the application scope of brake disc.

A second aspect, the utility model provides a brake disc mould, including above-mentioned brake disc psammitolite.

The utility model provides a brake disc mould, including last case, nowel to and above-mentioned brake disc psammitolite, wherein, go up case and nowel and mutually support the setting, the brake disc psammitolite is located the die joint of case and nowel. The arrangement improves the positioning accuracy of the sand core of the brake disc in the casting process, thereby improving the machining precision of the brake disc; through setting up the case and mutually supporting with the nowel, guarantee that the brake disc psammitolite can not take place the circumstances such as removal in the brake disc mould to guarantee that the brake disc that the casting obtained can satisfy geometric tolerances's requirement, and the inside of the brake disc that the casting obtained has better mechanical stability, improved the mechanical properties of the brake disc psammitolite that the casting obtained, satisfy the applicable demand of brake disc among the high-speed train.

The structure of the present invention and other objects and advantages thereof will be more clearly understood from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a brake disc sand core provided in the first embodiment of the present invention;

fig. 2 is a schematic diagram of a second sand core hole structure of the sand core body of the brake disc sand core according to the first embodiment of the present invention;

fig. 3 is a schematic view of a third sand core hole structure of the sand core body of the brake disc sand core according to the first embodiment of the present invention;

fig. 4 is a schematic diagram of a fourth sand core hole structure of the sand core body of the brake disc sand core according to the first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a brake disc sand core provided in the second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a brake disc mold provided by the third embodiment of the present invention.

Description of reference numerals:

100-a sand core body;

110-core hole;

111-a first sand core hole;

112-a second core hole;

112 a-a first linear extension;

112 b-a second linearly extending section;

112 c-an intermediate section;

113-a third core hole;

113 a-a third linearly extending section;

113 b-a fourth linearly extending section;

113 c-arc extension;

114-a fourth core hole;

114 a-a fifth linearly extending segment;

114 b-a transition section;

114 c-a first branch extension;

114 d-a second branch extension;

115-connecting sand core holes;

200-a middle circular table;

310-loading the box;

320-lower box;

330-pouring channel;

340-exhaust port.

Detailed Description

The brake disc is an important part in a high-speed train braking system, and the brake disc has better performance, so that the high-speed train can stably and safely run. The high-speed train brake disc includes first friction disc and second friction disc, and the friction surface of first friction disc and second friction disc sets up relatively, and first friction disc and second friction disc are provided with the heat dissipation muscle. At present, in the manufacturing of the brake disc in the high-speed train, four split sand cores are mostly used for splicing to realize the casting of the brake disc, wherein each brake disc is a fan-shaped sand core with a circumferential angle of 90 degrees. However, the brake disc obtained by casting the split sand core is prone to the problems that the split sand core is inaccurate in installation and positioning, sand core splicing surface castings are formed by sharp corners and burrs of a sand mold, the brake disc falls off sand, the overall performance of the interior of the brake disc is unstable, and the like, and the obtained brake disc cannot meet the use requirement of a high-speed train.

In view of this, the utility model provides a brake disc psammitolite and brake disc mould, through the brake disc psammitolite that sets up the integral type, it is inaccurate to have avoided adopting split type psammitolite casting brake disc and each components of a whole that can function independently psammitolite installation location in the casting process that leads to among the correlation technique, components of a whole that can function independently psammitolite concatenation department has burr and sand mould closed angle, the problem that sand and precision are poor appears falling in the casting process, it satisfies the user demand to have guaranteed that the action tolerance among the brake disc psammitolite casting process satisfies, the inside mechanical strength stability of foundry goods has been improved, the mechanical properties of the brake disc that the casting obtained has been improved. In-process at the design brake disc psammitolite sets up the shape in sand core hole and the distribution of sand core hole on the psammitolite body according to the user demand of brake disc, guarantees the utility model provides a processing method of brake disc psammitolite can be applicable to the casting of the brake disc of multiple working method, and then has improved the application scope of brake disc. The utility model provides a brake disc mould includes upper box, nowel to and above-mentioned brake disc psammitolite, wherein, upper box and nowel mutually support the setting, and the brake disc psammitolite is located the die joint of ascending and nowel. The arrangement improves the positioning accuracy of the sand core of the brake disc in the casting process and improves the machining precision of the brake disc.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

Fig. 1 is a schematic structural diagram of a sand core of a brake disc provided in an embodiment of the present invention. Figure 2 is the utility model provides a second psammitolite hole configuration sketch map of the psammitolite body of brake disc psammitolite that provides. Fig. 3 is the embodiment of the utility model provides a third psammitolite hole structure sketch map of the psammitolite body of brake disc psammitolite that provides. Figure 4 is the embodiment of the utility model provides a fourth psammitolite hole structure sketch map of the psammitolite body of brake disc psammitolite that provides.

Referring to fig. 1 to 4, a brake disc sand core according to an embodiment of the present invention includes a sand core body 100 and a middle circular truncated cone 200 connected to each other, the sand core body 100 is an annular structure, and an outer peripheral edge of the middle circular truncated cone 200 is connected to an inner peripheral edge of the sand core body 100. The sand core body 100 is provided with a plurality of sand core holes 110, and the plurality of sand core holes 110 are distributed at intervals along the circumferential direction of the sand core body 100. The ring-shaped sand core body 100 is adapted to the ring-shaped structure of the brake disc, wherein the sand core hole 110 is used for casting the heat dissipation rib on the friction ring of the brake disc. The middle circular truncated cone 200 plays a role in positioning the position of the sand core body 100 so as to avoid the problems of deformation and the like of the sand core body 100 in the casting process.

In an implementation mode, the sand core holes 110 are oblong holes, and the shape of the sand core holes 110 is shown in fig. 1, in this case, the heat dissipation ribs cast by the brake disc sand core are plate-shaped heat dissipation ribs, and the heat dissipation ribs of the brake disc cast by the brake disc sand core arranged in this way have large air flow area and flow speed, so that a good heat dissipation effect is achieved. In addition, set up between two friction discs through board dress heat dissipation muscle interconnect, be favorable to improving the structural strength of brake disc, improve the braking effect of brake disc in high-speed train.

Further, the core hole 110 includes a first core hole 111, the first core hole 111 is linear, and the first core hole 111 extends in a radial direction of the core body 100. Through the heat dissipation muscle of the brake disc that first sand core hole 111 casting obtained, the extending direction of heat dissipation muscle distributes in the footpath of brake disc body, and the holding power between two friction discs of brake disc radially evenly distributed along the footpath of brake disc to guarantee that the heat dissipation muscle has better support performance to two friction discs of brake disc, improved the performance of brake disc.

Further, the core hole 110 includes a second core hole 112, and the second core hole 112 includes a first straight extension 112a, an intermediate section 112c, and a second straight extension 112b connected in series. The cross-sectional area of the intermediate section 112c is greater than the cross-sectional area of the first linearly extending section 112a and the cross-sectional area of the second linearly extending section 112 b. Wherein the second sand core hole 112 is used for casting a positioning boss between the first friction disc and the second friction disc of the brake disc. As shown in fig. 2, by providing the cross-sectional area of the middle section 112c of the second sand core hole 112 to be larger than the cross-sectional areas of the first and second linearly extending sections 112a and 112b, and by providing the cross-sectional area of the middle portion of the positioning boss on the brake disk obtained by casting to be larger than the cross-sectional areas of both sides in the radial direction on the positioning boss, when the mutual position between the two brake disks is aligned, the positioning between the two friction disks can be achieved by aligning the middle portion of the positioning boss.

It should be noted that, after the positioning boss of the brake disc is cast by using the second sand core hole 112, the cross-sectional area of the middle part of the positioning boss cast by the middle section 112c is larger than the cross-sectional areas of the two sides of the positioning boss in the radial direction of the brake disc, in order to realize accurate positioning between the first friction disc and the second friction disc, a positioning hole may be formed in the middle part of the positioning boss by using a machine tool machining method, and when the first friction disc and the second friction disc are positioned and assembled, the positioning holes on the first friction disc and the second friction disc are aligned first, and then the first friction disc and the second friction disc are connected.

In one embodiment, the core hole 110 includes a third core hole 113, the third core hole 113 is disposed on opposite sides of the second core hole 112, the third core hole 113 includes a third straight extension 113a, an arc extension 113c and a fourth straight extension 113b connected in sequence, and the arc extension 113c is disposed opposite to the middle section 112 c. The arcuate extension 113c is curved toward a side facing away from the intermediate section 112 c. The schematic structural diagram of third sand core hole refers to fig. 3, and arc line extension section 113c plays the effect of dodging, avoids the distance between interlude 112c and third sand core hole 113 short excessively to avoid the distance undersize between the third heat dissipation muscle after location boss after the casting and the third sand core hole 113 casting, increase the circulation passageway of the air between location boss and the third heat dissipation muscle, improve the radiating effect of brake disc.

The core aperture 110 of the sand core body 100 of the brake disc sand core provided in the first embodiment further includes a fourth core aperture 114, the fourth core aperture 114 includes a fifth straight extension 114a, a transition section 114b, a first branch extension 114c and a second branch extension 114d, the fifth straight extension 114a is connected to the transition section 114b on a side close to the intermediate circular truncated cone 200, and the first branch extension 114c and the second branch extension 114d are connected to the transition section 114b on a side far from the intermediate circular truncated cone 200. The structural schematic of the fourth sand core hole is shown with reference to fig. 4, and as an achievable embodiment thereof, the cross-sectional area of the transition section 114b is larger than the cross-sectional areas of the fifth straight extension section 114a, the first branch extension section 114c and the second branch extension section 114 d. The fourth core hole 114 functions as a coupling boss between the first and second friction disks of the cast brake disk, and the first and second friction disks are coupled by the coupling boss.

It should be noted that, in the brake disc sand core provided in the first embodiment, the first branch extension 114c and the second branch extension 114d may be disposed not to overlap or may be disposed to overlap. When the first branch extension 114c and the second branch extension 114d can be arranged to overlap, the extending direction of the first branch extension 114c and the second branch extension 114d in the radial direction of the sand core body 100 is equal to the extending direction of the fifth straight extension 114a, and such an arrangement reduces the difficulty in machining the brake disc.

Further, after the connection boss of the brake disc is cast by using the fourth sand core hole 114, the area of the middle part of the connection boss cast by the transition section 114b is larger than the cross-sectional areas of the connection boss on the two sides of the connection boss in the radial direction of the brake disc, in order to realize effective connection between the first friction disc and the second friction disc, the connection hole can be formed in the middle part of the connection boss in a machining mode, after the first friction disc and the second friction disc of the brake disc are positioned and calibrated, the connection holes in the connection boss oppositely arranged on the first friction disc and the second friction disc are tightly connected by using the connection piece, and therefore assembly of the brake disc is completed.

In the brake disc sand core provided in the first embodiment, there are a plurality of fourth sand core holes 114, both sides of the fourth sand core holes 114 in the circumferential direction of the sand core body 100 are disposed adjacent to the second sand core holes 112, and at least one third sand core hole 113 is disposed between the fourth sand core hole 114 and the second sand core holes 112. As one of realizable ways, the number of the third sand core holes 113 between the fourth sand core hole 114 and the second sand core hole 112 is 1. In this embodiment one, set up second sand core hole and fourth sand core hole and play the effect that is used for the location boss and the connection boss of the first friction disk and the second friction disk of casting brake disc respectively, fourth sand core hole 114 and second sand core hole 112 are close to the setting in the circumference of psammitolite body 100 and can be guaranteed to connect the first friction disk and the second friction disk after fixing a position the two, avoid fixing a position the boss and connect the too far and the condition such as the position error between the friction disk that leads to between the boss is too big. In addition, because the middle section 112c with a large cross-sectional area is arranged in the second sand core hole, and the transition section 114b with a large middle area is arranged in the fourth sand core hole 114, the third sand core hole 113 is arranged between the fourth sand core hole 114 and the second sand core hole 112, so that the positioning boss and the connecting boss of the cast brake disc can be prevented from being too tight in the middle part of the brake disc body in the radial direction, and the heat dissipation effect of the brake disc is influenced.

The brake disc psammitolite that provides in this embodiment one can be used to the wheel dress brake disc in the high-speed train of design, and the wheel dress brake disc is installed in the both sides of the wheel of train, closely laminates through reference column and bolt fastener and wheel radials.

It should be noted that, the embodiment of the present invention provides a depth of a sand core hole 110 on a sand core body 100 of a brake disc sand core, which can be set according to actual requirements, when the brake disc sand core is a wheel-mounted brake disc of a high-speed train, the depth of the sand core hole 110 can be set to 13-17mm, it is ensured that a sufficient ventilation area is provided between a first friction disc and a second friction disc of the brake disc after casting, as an implementation manner that can be realized, the depth of the sand core hole 110 is 15mm, and a casting requirement of the brake disc on the high-speed train is ensured.

As an achievable embodiment, the intermediate truncated cone 200 and the sand core body 100 are integrally formed. The extension length of the intermediate circular truncated cone 200 in the direction perpendicular to the core body 100 is greater than the extension length of the core body 100. Such an arrangement is advantageous to ensure that the brake disc after casting is annular in shape. In addition, the middle circular truncated cone 200 is arranged, so that the problems that the sand core body 100 deforms, stretches and contracts due to heating in the casting process are solved, and the shape and position errors of the cast brake disc can be reduced by integrally forming the middle circular truncated cone 200 and the sand core body 100.

Example two

Fig. 5 is a schematic structural diagram of a brake disc sand core provided by the second embodiment of the present invention.

Referring to fig. 5, a second embodiment of the present invention provides a brake disc sand core based on the first embodiment. The difference between the second embodiment and the first embodiment is that: the configuration of the core apertures 110 on the sand core body 100 of the brake disc sand core is different.

Specifically, as an achievable implementation mode, the sand core holes are round holes, and the distance between every two adjacent sand core holes is equal. The psammitolite hole is used for making the heat dissipation muscle of brake disc, and the heat dissipation muscle is connected between first friction disk and second friction disk, and the interval that sets up between every two adjacent sand core holes equals to guarantee that after the brake disc psammitolite casting that is provided by this embodiment two obtained the brake disc, the holding power evenly distributed of receiving on the disk body of first friction disk and second friction disk, thereby reduced the phenomenon that stress concentrates on the brake disc, improved the mechanical properties of brake disc. In addition, through such setting, the ventilation passageway of brake disc is even distributes in the brake disc to guaranteed the heat dissipation homogeneity in the brake disc, avoided the brake disc heat dissipation uneven and the stress concentration scheduling problem that leads to, guarantee that the brake disc has better performance.

Further, the distance between two adjacent sand core holes is the distance D1 in FIG. 4, the distance D1 ranges from 30mm to 35mm, the diameter of the sand core hole ranges from R1 in FIG. 4, and the diameter of R1 ranges from 20mm to 25 mm. The arrangement can ensure that the cast brake disc has better heat dissipation performance and higher mechanical performance. When the distance between two adjacent sand core holes 110 on sand core body 100 is greater than 35mm, the distribution of the heat dissipation ribs of the brake disc obtained by casting is too sparse, and the brake disc has poor supporting performance, and when the distance between two adjacent sand core holes 110 is less than 30mm, the heat dissipation ribs of the brake disc obtained by casting are distributed too densely, so that the ventilation area between the first friction disc and the second friction disc of the brake disc is reduced, and the heat dissipation performance of the brake disc is reduced. Wherein, as an achievable embodiment, the distance between two adjacent sand core holes can be 32mm or 33 mm. Furthermore, the diameter range of the sand core hole is set to be 20-25mm, so that the brake disc after casting has good supporting force and good heat dissipation performance. When the diameter of the sand core hole 110 is smaller than 20mm, the diameter of the heat dissipation ribs of the brake disc obtained by casting is too small, so that the support force for the first friction disc and the second friction disc is small, and the mechanical strength of the brake disc is reduced; when the diameter of the sand core hole 110 is larger than 25mm, the diameter of the cast heat dissipation rib is too large under the condition that the distance between two adjacent sand core holes 110 is not changed, so that the ventilation area is reduced, and the heat dissipation performance of the brake disc is reduced. As an achievable embodiment, the diameter of the sand core holes may be 21mm or 22 mm.

Further, one side of the sand core body close to the middle circular truncated cone is provided with a connecting sand core hole 115, and at least part of the connecting sand core hole extends into the middle circular truncated cone 200. The cross-sectional area of the connecting core hole 115 is increased and then decreased from one side of the middle circular truncated cone to one side of the core body. The connecting core hole 115 is used to form friction surfaces of the first friction disk and the second friction disk during casting, and this arrangement is advantageous to improve the stability of connection between the two disks.

The brake disc sand core provided in the second embodiment can be used for designing a shaft-mounted brake disc in a high-speed train, the shaft-mounted brake disc can be mounted on a power output shaft of the train, and braking of the high-speed train is achieved by clamping the power output shaft.

Other technical features are the same as those of the first embodiment and can achieve the same technical effects, and are not described in detail herein.

EXAMPLE III

Fig. 6 is a schematic structural diagram of a brake disc mold provided by the third embodiment of the present invention.

Referring to fig. 6, an embodiment of the present invention provides a brake disc mold, including the above-mentioned brake disc sand core.

The brake disc mould comprises an upper box 310 and a lower box 320, the upper box 310 and the lower box 320 are arranged in a matched mode, and the brake disc sand core is located on the parting surface of the upper box 310 and the lower box 320. Molten metal enters the brake disc mold through runner 330 to complete the casting of the brake disc. In addition, the upper box 310 of the brake disc mold is further provided with an exhaust port 340, and air in the cavity of the brake disc mold is exhausted from the exhaust port 340, so that the brake disc mold is ensured to have better casting performance. The brake disc mould that this embodiment third provided has improved the location accuracy of brake disc psammitolite in the casting process to the machining precision of brake disc has been improved. Through setting up upper box 310 and lower box 320 and mutually supporting, guarantee that the brake disc psammitolite can not take place to remove or other circumstances in the brake disc mould to guarantee that the brake disc that the casting obtained can satisfy the requirement of geometric tolerances, and the inside of the brake disc that the casting obtained has better mechanical stability, improved the mechanical properties of the brake disc psammitolite that the casting obtained, satisfy the applicable demand of brake disc in the high-speed train.

Other technical features are the same as those of the first embodiment and the second embodiment, and the same technical effects can be achieved, and the third embodiment is not described in detail.

In the description of the present invention, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through an intermediary, a connection between two elements, or an interactive relationship between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. The brake disc sand core is characterized by comprising a sand core body and a middle circular table which are connected with each other, wherein the sand core body is of an annular structure, and the outer periphery of the middle circular table is connected to the inner periphery of the sand core body;

the sand core body is provided with a plurality of sand core holes which are distributed at intervals along the circumferential direction of the sand core body.

2. The brake disc sand core of claim 1, wherein the core bore is an oblong hole.

3. The brake disc sand core of claim 2, wherein the core apertures comprise first core apertures that are rectilinear, the first core apertures extending radially of the sand core body.

4. The brake disc sand core of claim 3, wherein the core bore comprises a second core bore comprising a first linear extension, a middle segment, and a second linear extension connected in series;

the cross-sectional area of the intermediate section is greater than the cross-sectional area of the first linearly extending section and the cross-sectional area of the second linearly extending section.

5. The brake disc sand core of claim 4, wherein the core apertures comprise third core apertures disposed on opposite sides of the second core aperture, the third core apertures comprising a third linear extension, an arcuate extension, and a fourth linear extension connected in series, the arcuate extension disposed opposite the intermediate segment;

the arcuate extension is curved toward a side facing away from the intermediate section.

6. The brake disc sand core of claim 5, wherein the sand core apertures comprise a fourth sand core aperture comprising a fifth straight extension connected to a side of the transition section proximal to the intermediate boss, a transition section, a first branch extension and a second branch extension connected to a side of the transition section distal from the intermediate boss.

7. The brake disc sand core of claim 1, wherein the core apertures are circular apertures, and the spacing between each two adjacent core apertures is equal;

the distance between two adjacent sand core holes ranges from 30mm to 35mm, and/or the diameter of each sand core hole ranges from 20mm to 25 mm.

8. The brake disc sand core of claim 7, wherein a connecting sand core aperture is provided in a side of the sand core body adjacent the intermediate boss, at least a portion of the connecting sand core aperture extending into the intermediate boss;

the cross-sectional area of the connecting sand core hole is increased from one side of the middle circular truncated cone to one side of the sand core body and then is reduced.

9. The brake disc sand core of any one of claims 1 to 8, wherein the intermediate boss and the sand core body are integrally formed;

in the direction perpendicular to the sand core body, the extension length of the middle round platform is greater than that of the sand core body.

10. A brake disc mould comprising a brake disc sand core as claimed in any one of claims 1 to 9.

Images