Intermediate piece and method for mounting brake disc on shaft that interacts with eddy current brake
By installing middleware made of low thermal conductivity materials on the shaft, the damage to bearings and thermally sensitive components caused by heat transfer between the vortex brake and the brake disc is solved, and the effect of thermal decoupling, protection of thermally sensitive components and reducing maintenance costs is achieved.
Patent Information
- Application Number
- CN202411890641.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-21
- Filing Date
- 2024-12-20
- Publication Date
- 2025-06-24
AI Technical Summary
In the prior art, heat transfer between the vortex brake and the brake disc causes damage to the bearings and other thermally sensitive components, increasing maintenance costs and limiting the frequency of application of the vortex brake.
By mounting a middleware on the shaft, which is made of a low thermal conductivity material, such as stainless steel alloy, titanium alloy, glass or ceramic, to prevent or reduce heat flow from the brake disc to the shaft. The middleware may have external threads, internal threads or screw openings for easy installation and tightening.
Thermal decoupling between the shaft and the brake disc mounted thereon is achieved, protecting the bearings and other thermally sensitive components, reducing maintenance costs, and allowing more frequent use of vortex brakes, even replacing multiple conventional brakes.
Smart Images
Figure CN120191328A_ABST
Abstract
Description
Field of the Invention
[0001] The present invention relates to an intermediate member for a brake disc for cooperating with a vortex brake (Wirbelstrombremse). The present invention also relates to a brake disc for a vortex brake; a shaft on which a brake disc cooperating with a vortex brake can be mounted; and a vortex brake system. In addition, the present invention also relates to a method for mounting a brake disc cooperating with a vortex brake on a shaft. Background Art
[0002] Figure 1 A schematic view of a vortex brake, a brake disc cooperating therewith, and a shaft equipped with the brake disc is shown to illustrate a conventional practice of mounting the brake disc on the shaft, which is internal prior art known to the applicant.
[0003] According to the conventional practice, a brake disc 12 (with a disc thickness of d0) cooperating with the schematically shown vortex brake 10 is fastened to a shaft 16 fixed by means of at least one bearing 14 such that the braking force applied to the brake disc 12 by the vortex brake 10 is transmitted to the shaft 16 through mechanical contact between the brake disc 12 and the shaft 16. As schematically shown by the block 18 in Figure 1 , in addition to the tractor, at least one wheel is mechanically connected to the shaft 16 by means of a transmission such that at least one mechanically connected wheel is braked by the braking force transmitted to the shaft 16. Summary of the Invention
[0004] The present invention provides an intermediate member for a brake disc for cooperating with a vortex brake having the features of claim 1; a brake disc for a vortex brake having the features of claim 9; a shaft on which a brake disc cooperating with a vortex brake can be mounted having the features of claim 10, a vortex brake system having the features of claim 11, and a method for mounting a brake disc cooperating with a vortex brake on a shaft having the features of claim 12.
[0005] Advantages of the Invention
[0006] The present invention provides an advantageous possibility for restricting the heat flow between a brake disc cooperating with an eddy current brake and a corresponding shaft on which the respective brake disc is mounted. Thereby, the present invention enables thermal decoupling between the shaft and the brake disc mounted thereon, which typically heats up significantly during the operation of the eddy current brake. Since eddy current brakes are generally used as central brakes for vehicles / motor vehicles equipped with eddy current brakes, the heat-sensitive components of the vehicle / motor vehicle are usually at a relatively short distance from the shaft on which the brake disc cooperating with the respective eddy current brake is mounted. Therefore, by means of the thermal decoupling between the shaft and the brake disc mounted thereon, undesirable damage to the corresponding heat-sensitive components can be prevented. In particular, by means of the thermal decoupling achieved by the present invention, at least one bearing through which the respective shaft is fixed can be better protected. Therefore, the present invention helps to ensure the continued use of low-cost components in the vicinity of the shaft on which the brake disc cooperating with the eddy current brake is mounted. In addition, the use of the present invention can also eliminate the repair costs incurred for repairing or replacing the heat-sensitive components of the vehicle / motor vehicle damaged by the heat energy transferred from the brake disc to the shaft in a conventional manner.
[0007] The present invention also helps to more frequently use eddy current brakes in motor vehicles / cars, which can replace two or more conventional brakes. In addition, the present invention also helps to utilize the compact structural form of the eddy current brake, and it is possible not to accept adverse damage to the heat-sensitive components of the vehicle / motor vehicle equipped with the eddy current brake.
[0008] The terms "brake disc" and "shaft" used hereinafter can particularly be understood as "eddy current brake disc" and "eddy current brake shaft". Preferably, the brake disc is only designed to cooperate with the eddy current brake, and the brake disc is not suitable for joint operation with other conventional brake types.
[0009] In an advantageous embodiment, the intermediate member is completely made of at least one intermediate member material, and the corresponding thermal conductivity of the intermediate member material is less than or equal to 20 W / (m·K). Therefore, at least one "poorly thermally conductive" intermediate member material can effectively restrict the heat flow from the brake disc to the shaft.
[0010] For example, the corresponding thermal conductivity of at least one intermediate member material that completely forms the intermediate member is less than or equal to 10 W / (m·K). In particular, the corresponding thermal conductivity of at least one intermediate member material that completely forms the intermediate member is less than or equal to 5 W / (m·K). In all cases listed here, the shaft on which the brake disc cooperating with the eddy current brake is mounted can be better thermally decoupled from the brake disc by means of the intermediate member, which typically heats up significantly during the operation of the eddy current brake.
[0011] Preferably, the intermediate member is completely made of stainless steel alloy, titanium alloy, glass, and / or ceramic. All the materials listed here are well-suited for restricting the heat flow.
[0012] In a low-cost implementation, the middleware has an axially fastened opening with an internal thread. In this way, the shaft can be screwed onto the middleware in a simple manner.
[0013] Additionally or alternatively, the middleware can also have an external thread. In this way, by means of the tightening that can be simply implemented by the middleware on the brake disc, the middleware can be fastened to the brake disc that cooperates with the eddy current brake.
[0014] In another advantageous implementation, the middleware has at least one through screw opening, such that the brake disc can be screwed onto a shaft flange constructed or fastened on the shaft by means of at least one screw extending through the corresponding screw opening. This also facilitates the installation of the brake disc that cooperates with the eddy current brake on the shaft, such that the middleware is arranged between the brake disc and the shaft.
[0015] The above advantages can also be achieved by a brake disc for an eddy current brake, which can be mounted on a shaft and is constructed with such a middleware.
[0016] Similarly, a shaft on which a brake disc that cooperates with the eddy current brake can be mounted and is equipped with a corresponding middleware can also ensure the above advantages.
[0017] Furthermore, these advantages can be ensured by an eddy current brake system, which has an eddy current brake, a brake disc that cooperates with the eddy current brake, a shaft on which the brake disc is mounted, and such a middleware.
[0018] In addition, the implementation of a corresponding method for mounting a brake disc that cooperates with the eddy current brake on a shaft also provides the above advantages. It should be clearly pointed out that the method can be further developed according to the above implementations of the middleware. Description of the Drawings
[0019] The following describes other features and advantages of the present invention with reference to the drawings. Among them:
[0020] Figure 1 : shows a schematic diagram of an eddy current brake, a brake disc that cooperates with it, and a shaft equipped with the brake disc, for illustrating the conventional practice of mounting the brake disc on the shaft;
[0021] Figure 2a and 2b : shows a schematic diagram of the first implementation of the middleware; and
[0022] Figure 3a and 3b : shows a schematic diagram of the second implementation of the middleware. Detailed Description of the Invention
[0023] Figure 2a and2b Schematic diagram showing the first implementation of the middleware.
[0024] Figure 2a and 2b The middleware 20 schematically shown in is adapted to be used together with a brake disc 22 and a shaft 24, on which the brake disc 22 is mounted. However, it should be noted here that the statement "the brake disc 22 is mounted on the shaft 24" should not be understood as the brake disc 22 being "directly connected" to the shaft 24. Instead, the mounting of the brake disc 22 on the shaft 24 implemented by means of using the middleware 20 prevents / inhibits mechanical contact between the brake disc 12 and the shaft 16.
[0025] It should also be noted that the brake disc 22 should be understood as the brake disc 22 cooperating with an (unshown) eddy current brake (ECB, electronically controlled brake). In particular, the eddy current brake can be a high-speed eddy current brake, which operates directly on the shaft 24 of the electric motor of the vehicle / motor vehicle equipped with this brake. However, it should be noted that the use of the middleware 20 described below together with an (unshown) eddy current brake is not limited to any particular mounting position of the eddy current brake on the vehicle / motor vehicle. For example, the eddy current brake can also be positioned in or on the transmission of the vehicle / motor vehicle or on the tractor of the vehicle / motor vehicle. In addition, the use of the middleware 20 is not limited to a specific vehicle type / motor vehicle type of the vehicle / motor vehicle.
[0026] As Figure 2a can be seen, the middleware 20 can be arranged / is arranged between the brake disc 22 and the shaft 24, on which the brake disc 22 is mounted. The arrangement of the middleware 20 between the brake disc 22 and the shaft 24 can be achieved / is achieved in such a way that the braking force applied to the brake disc 22 by means of the eddy current brake can be transferred / is transferred to the shaft 24 through the mechanical contact between the brake disc 22 and the middleware 20 and through the mechanical contact between the middleware 20 and the shaft 24 and / or with an (unshown) shaft flange constructed or fastened to the shaft 24. As shown by the box 26 in Figure 2a , in addition to the tractor, at least one wheel can be mechanically connected to the shaft 24 via a transmission. If necessary, at least one mechanically connected wheel can be braked by means of the braking force applied to the brake disc 22 by the eddy current brake and transferred through the mechanical contact between the brake disc 22 and the middleware 20 and the mechanical contact between the middleware 20 and the shaft 24 and / or the shaft flange. Correspondingly, the rotational force applied to the shaft 24 can also be transmitted from the shaft 24 to the brake disc 22 through the mechanical contact between the middleware 20 and the shaft 24 and / or the shaft flange and through the mechanical contact between the brake disc 22 and the middleware 20.
[0027] In contrast, the heat transfer from the brake disc 22 to the shaft 24 is reduced by means of the intermediate member 20. Different from the above-mentioned prior art, since the mounting of the brake disc 22 on the shaft 24 cannot be understood as the brake disc 22 being "directly connected" to the shaft 24, even if the brake disc 22 is significantly heated due to the operation of the eddy current brake, the heat flow from the brake disc 22 to the shaft 24 can be restricted / reduced by means of the intermediate member 20. Therefore, the intermediate member 20 is arranged between the brake disc 22 and the shaft 24 in its use position, so that the heat transfer from the brake disc 22 to the shaft 24 is blocked / weakened by means of the intermediate member 20.
[0028] Therefore, the intermediate member 20 increases the thermal resistance between the brake disc 22 and the shaft 24. Thus, even if the brake disc 22 is significantly heated due to the operation of the eddy current brake, the shaft 24 can be significantly weakened / reduced from being undesirably heated together by means of the intermediate member 20. In this way, the intermediate member 20 prevents the heat-sensitive element from being subjected to strong thermal stress, because the heat-sensitive element is relatively close to the shaft 24, which may damage the heat-sensitive element. In Figure 2a and 2b For example, the bearing 28 arranged on the shaft 24 is better protected from undesired damage caused by heat by means of the intermediate member 20.
[0029] However, although the thermal decoupling of the shaft 24 from the brake disc 22 is achieved by means of the intermediate member 20, a good fixation of the brake disc 22 on the shaft 24 can still be ensured. The intermediate member 20 can in particular also be called an adapter, by means of which the desired force transmission between the brake disc 22 and the shaft 24 can be achieved, while the traditional heat conduction from the brake disc 22 to the shaft 24 is at least impeded / reduced by means of the intermediate member 20. At the same time, the intermediate member 20, the brake disc 22 and the shaft 24 form a compact brake unit, by means of whose compact structural form not only structural space but also costs can be saved.
[0030] As can be seen from the following description, the undesired heat conduction from the brake disc 22 to the shaft 24 is restricted / reduced not only by the shape of the intermediate member 20, in particular by the surface design of the intermediate member 20, but also by at least one intermediate member material of which the intermediate member 20 is fully made. Preferably, the thermal conductivity of at least one intermediate member material of which the intermediate member 20 is fully made is less than or equal to 20 W / (m*K) (watts per (meter times kelvin)), in particular less than or equal to 10 W / (m*K), especially less than or equal to 5 W / (m*K). For this purpose, for example, a stainless steel alloy (thermal conductivity, for example, 16 W / (m*K)), a titanium alloy (thermal conductivity, for example, 7 W / (m*K)), glass (thermal conductivity especially 0.8 W / (m*K)) and / or ceramic (thermal conductivity especially 0.8 W / (m*K)) can be used as at least one intermediate member material, and the intermediate member 20 is fully made of this intermediate member material. The examples of at least one intermediate member material listed here are not ultimately decisive.
[0031] The intermediate member 20 can have a (substantially) disc-shaped shape, wherein the intermediate member 20 can have two surfaces 20a and 20b that are parallel to each other. The outer peripheral surface 20c of the intermediate member 20 that connects the two surfaces 20a and 20b can be shaped (approximately) like a cylindrical shell. In addition, as Figure 2b schematically shown, if at least one intermediate member material has a high enough strength, then the intermediate member 20 can have a large number of recesses 20d on its outer peripheral surface 20c. In particular, using a stainless steel alloy as at least one intermediate member material ensures a high enough strength of the intermediate member 20 for constructing a large number of recesses 20d on the outer peripheral surface 20c.
[0032] In Figure 2a and 2b embodiments, the intermediate member 20 has an external thread 20e on its first side that is to be aligned / has been aligned with the brake disc 22, and it can be screwed onto a mating thread constructed on the brake disc 22. In addition, the intermediate member 20 also has a shaft fastening opening 20f with an internal thread on its second side that is to be aligned / has been aligned with the shaft 24, Figure 2a and a mating thread of the shaft 24 (not shown in
[0033] Another advantage of the intermediate member 20 is that it relieves the brake disc 22 of its traditional function as a "heat accumulator". Since the heat capacity of the brake disc 22 is significantly reduced when the intermediate member 20 is used compared to the above-described prior art, the disc thickness d of the brake disc 22 (i.e., the distance between the two surfaces 20a and 20b of the brake disc 22 that are parallel to each other) is also smaller than that of the above-described prior art. Accordingly, when the intermediate member 20 is used, the brake disc 22 can also be constructed to be lighter than the above-described prior art. Since the brake disc 22 does not have relatively many problems even when strongly heated when the intermediate member 20 is used, in this case, heat dissipation can be achieved only by the heat radiation of the brake disc 22 to its surroundings. Therefore, when the intermediate member 20 is used, it is not necessary to perform troublesome cooling on the brake disc 22.
[0034] Figure 3a and 3b FIG. shows a schematic view of a second embodiment of the intermediate member.
[0035] Different from the above-described embodiment, Figure 3a and 3b the intermediate member 20 has at least one through screw opening 20g that extends between the two surfaces 20a and 20b of the intermediate member that are parallel to each other, such that the brake disc 20 can be tightened to a shaft flange 30 constructed or fastened to the shaft 24 by means of at least one (not shown) screw that extends through the corresponding screw opening 20g. Figure 3a and 3b The intermediate member 20 can also be referred to as a U-shaped washer. The intermediate member 20 preferably constructed with at least one through screw opening 20g is made of ceramic. In this case, the heat transfer from the brake disc 22 to the shaft 24 occurs almost only through at least one screw.
[0036] Regarding Figure 3a and 3b other features and advantages of the intermediate member 20, please refer to Figure 2a and 2b the description of the embodiment.
[0037] In another advantageous embodiment, the intermediate member 20 and the brake disc 22 form a compact unit that cannot / can hardly be separated without damage. Such a unit can be referred to as a brake disc 22 for an eddy current brake, which can be mounted on the shaft 24. Alternatively, the intermediate member 20 and the shaft 24 can also form a compact unit that cannot or can hardly be separated without damage. In this case, the unit can be described as a shaft 24 on which a brake disc 22 that cooperates with the eddy current brake can be mounted.
[0038] In all of the above embodiments, the brake disc 22 has a (substantially) disc-shaped form. However, it should be noted here that the use of the intermediate member 20 together with the brake disc 22, or the construction of the brake disc 22 and the intermediate member 20 as a compact unit, is not limited to the (substantially) disc-shaped form of the brake disc 22. For example, the brake disc 22 may also have a "pan-like" or "drum-like" shape without affecting the cooperation between the brake disc 22 and the intermediate member 20. Similarly, the orientation / positioning of at least one coil of the eddy current brake that cooperates with the brake disc 22 / is equipped with the brake disc 22 can also be selected with a relatively large degree of design freedom.
[0039] The structures of FIGS. 2 and 3 respectively implement an eddy current braking system having an eddy current brake, a brake disc 22 that cooperates with the eddy current brake, a shaft 24 on which the brake disc 22 is located, and an advantageous intermediate member 20.
[0040] The structures shown in FIGS. 2 and 3 can be produced by implementing a method of mounting the brake disc 22 that cooperates with the eddy current brake on the shaft 24. For this purpose, the corresponding intermediate member 20 is arranged between the brake disc 22 and the shaft 24 such that the braking force applied to the brake disc 22 by the eddy current brake is transferred / transmitted to the shaft 24 through the mechanical contact between the brake disc 22 and the intermediate member 20 and through the mechanical contact between the intermediate member 20 and the shaft 24 and / or with a shaft flange 30 constructed or fastened to the shaft 24, while the heat transfer from the brake disc 22 to the shaft 24 is reduced by means of the intermediate member 20. However, it should be noted that the feasibility of the method described herein is not limited to the structures of FIGS. 2 and 3.
Claims
1. An intermediate piece (20) for a brake disc (22) for cooperating with an eddy current brake, It is characterized in that The intermediate piece (20) can be arranged or arranged between the brake disc (22) and the shaft (24), and the brake disc (22) can be mounted or mounted on the shaft, so that the braking force applied to the brake disc (22) by means of the eddy current brake can be transferred to the shaft (24) through the mechanical contact between the brake disc (22) and the intermediate piece (20) and through the mechanical contact between the intermediate piece (20) and the shaft (24) and / or with a shaft flange (30) constructed or fastened on the shaft (24), while the transfer of heat energy from the brake disc (22) to the shaft (24) is reduced by means of the intermediate piece (20).
2. The middleware (20) according to claim 1, wherein: The intermediate piece (20) is completely made of at least one intermediate piece material, the corresponding thermal conductivity of the intermediate piece material being less than or equal to 20 W / (m*K).
3. The middleware (20) according to claim 2, wherein: The corresponding thermal conductivity of the at least one intermediate piece material from which the intermediate piece (20) is completely made is less than or equal to 10 W / (m*K).
4. The middleware (20) according to claim 3, wherein: The corresponding thermal conductivity of the at least one intermediate piece material from which the intermediate piece (20) is completely made is less than or equal to 5 W / (m*K).
5. The intermediate piece (20) according to any one of the preceding claims, wherein: The intermediate piece (20) is completely made of stainless steel alloy, titanium alloy, glass and / or ceramic.
6. The intermediate piece (20) according to any one of the preceding claims, wherein: The intermediate member (20) has a shaft fastening opening (20f) with an internal thread.
7. An intermediate piece (20) according to any one of the preceding claims, wherein: The intermediate piece (20) has an external thread (20e).
8. The intermediate piece (20) according to any one of claims 1 to 5, wherein: The intermediate piece (20) has at least one through-going screw opening (20g), so that the brake disk (22) can be screwed onto a shaft flange (30) constructed or fastened on the shaft (24) by means of at least one screw extending through a corresponding screw opening (20g).
9. A brake disc (22) for an eddy current brake, said brake disc being mountable on a shaft (24) and having: Intermediate piece (20) according to any one of the preceding claims.
10. A shaft (24) on which a brake disc (22) cooperating with an eddy current brake can be mounted, having: An intermediate piece (20) according to any one of claims 1 to 8.
11. Eddy current braking system, with: Eddy current brakes; a brake disc (22) cooperating with the eddy current brake; a shaft (24) on which the brake disc (22) can be mounted; and Intermediate piece (20) according to any one of the preceding claims.
12. A method for mounting a brake disc (22) cooperating with an eddy current brake on a shaft (24), characterized by the following steps: An intermediate piece (20) is arranged between the brake disc (22) and the shaft (24) so that the braking force applied to the brake disc (22) by means of the eddy current brake can be transferred to the shaft (24) through the mechanical contact between the brake disc (22) and the intermediate piece (20) and through the mechanical contact between the intermediate piece (20) and the shaft (24) and / or a shaft flange (30) constructed or fastened to the shaft (24), while the transfer of heat energy from the brake disc (22) to the shaft (24) is reduced by means of the intermediate piece (20).