A bimetallic brake drum steel shell structure

Abstract

The utility model relates to a bimetallic brake drum steel shell structure, it solves the problem of poor heat dissipation and unstable connection of the prior art brake drum steel shell, it includes the outer shell, the outer shell circumferential outer wall is provided with the heat dissipation exhaust structure with its inside intercommunication, the outer shell circumferential inside is connected with the heat dissipation inner shell mechanism through the clamping positioning assembly, and the outer shell one end is provided with fixed connection assembly, and the outer shell is close to the fixed connection assembly one end circumferential inside and is provided with locking connection mechanism, the utility model has the advantages of being able to realize efficient heat dissipation and stable connection, and stable structure.

Description

Technical Field

[0001] This utility model relates to the field of brake component technology, specifically to a bimetallic brake drum steel shell structure. Background Technology

[0002] Current new steel composite brake drums are generally composed of an outer steel shell and an inner gray cast iron composite. The steel shell is formed by blanking and stamping steel plates into a disc, which is then directly spun into shape. However, the utilization rate of the steel plates is low during the blanking process, and the spun steel requires high toughness and strength. If ordinary steel plates are used for spun steel, cracking occurs directly during the process. Therefore, spun steel must be made from special steel, which is custom-made from steel mills, resulting in high prices and long production cycles, severely impacting production. Alternatively, some methods directly spun steel plates into a steel shell, but this method places excessive stress on the equipment. Domestic spinning machines cannot withstand such high loads for extended periods, and critical components such as the main shaft, bearings, and molds are prone to fatigue damage, affecting production efficiency. Furthermore, existing brake drum steel shells have poor heat dissipation performance and insufficient connection stability.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a novel brake drum steel shell [CN201721348317.X], which includes a bottom flange and a steel shell cylinder welded to the upper side of the bottom flange. The end of the steel shell cylinder that connects to the bottom flange is necked, and the bottom flange is a closed ring formed by bending and welding steel plates.

[0004] The above solution has solved to some extent the problems of high raw material cost of brake drum steel shell and easy fatigue of spinning equipment in the existing technology. However, the solution still has many shortcomings, such as poor heat dissipation performance of brake drum steel shell and insufficient connection stability. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a bimetallic brake drum steel shell structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a bimetallic brake drum steel shell structure, including an outer shell, a heat dissipation and exhaust structure that communicates with the inner side of the outer shell on its circumferential outer wall, a heat dissipation inner shell mechanism connected to the inner side of the outer shell by a snap-fit ​​positioning component, and a fixed connection component provided at one end of the outer shell, and a locking connection mechanism provided on the inner side of the outer shell near the fixed connection component on its circumferential inner side.

[0007] In the above-mentioned single or bimetallic brake drum steel shell structure, the outer shell includes a first annular portion, a second annular portion, and a third annular portion arranged sequentially. The first annular portion, the second annular portion, and the third annular portion are integrally formed. A snap-fit ​​seat is provided at the end of the first annular portion away from the second annular portion, and a connecting seat is provided at the end of the third annular portion away from the second annular portion.

[0008] In the aforementioned single or bimetallic brake drum steel shell structure, the heat dissipation and exhaust structure includes several first exhaust holes arranged circumferentially on both sides of the first annular portion, several second exhaust holes arranged circumferentially on one side of the second annular portion, and several third exhaust holes arranged circumferentially on one side of the third annular portion.

[0009] In the aforementioned one- or bimetallic brake drum steel shell structure, the first exhaust port, the second exhaust port, and the third exhaust port are staggered.

[0010] In the aforementioned one or bimetallic brake drum steel shell structure, the heat dissipation inner shell mechanism includes an inner shell body, and a heat dissipation extension is provided on one side of the inner shell body, extending outward toward the first annular portion, and a plurality of heat dissipation fins are embedded in the circumferential outer wall of the heat dissipation extension.

[0011] In the aforementioned one or bimetallic brake drum steel shell structure, the snap-fit ​​positioning assembly includes a positioning groove disposed on the circumferential inner side of the first annular portion, a snap-fit ​​portion formed on the circumferential inner side of the second annular portion away from the first annular portion, and a pressing portion formed on the circumferential inner side of the third annular portion away from the second annular portion.

[0012] In the aforementioned single or bimetallic brake drum steel shell structure, the locking connection mechanism includes an annular connecting part with one end face of the connecting seat, and the annular connecting part is provided with a plurality of fixed connecting holes for external screw thread connection.

[0013] In the aforementioned single or bimetallic brake drum steel shell structure, the fixed connection assembly includes a fixed ring body disposed on the inner side of the outer shell in the circumferential direction. The fixed ring body has a locking hole on one side near the annular connection part and a plug-in slot on the other side.

[0014] In the aforementioned one or bimetallic brake drum steel shell structure, the end of the inner shell body away from the heat dissipation extension is provided with an insertion positioning part that is inserted into the positioning slot.

[0015] In the aforementioned one- or bimetallic brake drum steel shell structure, there is an annular heat dissipation cavity between the fixed ring body and the annular connecting part.

[0016] Compared with the prior art, the advantages of this utility model are: 1. By providing a first exhaust hole, a second exhaust hole, and a third exhaust hole in the first annular portion, the second annular portion, and the third annular portion respectively, and the exhaust holes being staggered, hot air can be guided to flow and be discharged fully, effectively removing the heat generated by friction; at the same time, the annular heat dissipation cavity between the fixed ring body and the annular connecting portion, together with the heat dissipation extension portion extending outward and the outer wall being embedded with several heat dissipation fins, significantly increases the heat dissipation area, which can quickly transfer the heat absorbed by the inner shell to the external environment, further enhancing air circulation and heat dissipation.

[0017] 2. The snap-fit ​​positioning assembly positions, clamps, and presses the heat dissipation inner shell mechanism from different axial positions through positioning slots, clamping parts, and pressing parts, achieving a tight fit and limiting of the inner shell and outer shell, and preventing the inner shell from loosening or shifting; secondly, the fixing ring is connected to the external threaded rod through the locking hole, and positions one end of the inner shell body through the insertion slot, ensuring the connection stability of the overall structure under braking impact. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a sectional view of the outer shell of this utility model; Figure 4 This is a schematic diagram of the heat dissipation inner shell mechanism in this utility model; In the figure: outer shell 1, first annular part 11, second annular part 12, third annular part 13, snap-fit ​​seat 14, connecting seat 15, heat dissipation and exhaust structure 2, first exhaust hole 21, second exhaust hole 22, third exhaust hole 23, snap-fit ​​positioning assembly 3, positioning slot 31, snap-fit ​​part 32, pressing part 33, heat dissipation inner shell mechanism 4, inner shell body 41, heat dissipation extension part 42, heat sink 43, plug-in positioning part 44, fixed connection assembly 5, fixed ring body 51, locking hole 52, plug-in slot 53, locking connection mechanism 6, annular connection part 61, fixed connection hole 62, heat dissipation cavity 7. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-4 As shown, a bimetallic brake drum steel shell structure includes an outer shell 1. The outer wall of the outer shell 1 is provided with a heat dissipation and exhaust structure 2 that communicates with its inner side. The inner side of the outer shell 1 is connected to a heat dissipation inner shell mechanism 4 through a snap-fit ​​positioning component 3. A fixed connection component 5 is provided at one end of the outer shell 1. A locking connection mechanism 6 is provided at the inner side of the outer shell 1 near the fixed connection component 5.

[0021] The outer shell 1 includes a first annular portion 11, a second annular portion 12, and a third annular portion 13 arranged sequentially. The first annular portion 11, the second annular portion 12, and the third annular portion 13 are integrally formed. A snap-fit ​​seat 14 is provided at the end of the first annular portion 11 away from the second annular portion 12, and a connecting seat 15 is provided at the end of the third annular portion 13 away from the second annular portion 12.

[0022] As can be seen, the heat dissipation and exhaust structure 2 includes a number of first exhaust holes 21 arranged circumferentially on both sides of the first annular portion 11, a number of second exhaust holes 22 arranged circumferentially on one side of the second annular portion 12, and a number of third exhaust holes 23 arranged circumferentially on one side of the third annular portion 13.

[0023] Furthermore, the first exhaust port 21, the second exhaust port 22, and the third exhaust port 23 are staggered.

[0024] This design avoids airflow short-circuiting, guides air to flow fully inside the outer casing 1, efficiently removes frictional heat, and improves the heat dissipation effect of the brake drum steel shell.

[0025] Specifically, the heat dissipation inner shell mechanism 4 includes an inner shell body 41, and a heat dissipation extension 42 extending outward toward the first annular portion 11 is provided on one side of the inner shell body 41, and a plurality of heat dissipation fins 43 are embedded in the outer wall of the heat dissipation extension 42 at equal intervals.

[0026] The heat sink 43 significantly increases the heat dissipation area, enabling it to quickly transfer the heat absorbed by the inner shell 41 to the external environment.

[0027] Furthermore, the snap-fit ​​positioning component 3 includes a positioning slot 31 disposed on the inner side of the first annular portion 11, a snap-fit ​​portion 32 formed on the inner side of the second annular portion 12 away from the first annular portion 11, and a pressing portion 33 formed on the inner side of the third annular portion 13 away from the second annular portion 12.

[0028] The snap-fit ​​positioning component 3 clamps and presses against the heat dissipation inner shell mechanism 4 from different axial positions, with multiple limits to prevent the inner shell from loosening or shifting, thus improving connection stability.

[0029] More specifically, the locking connection mechanism 6 includes an annular connection portion 61 with one end face of the connection seat 15, and the annular connection portion 61 is provided with a plurality of fixed connection holes 62 for threaded connection with external screws.

[0030] In detail, the fixed connection assembly 5 includes a fixed ring 51 disposed on the inner side of the outer casing 1. The fixed ring 51 has a locking hole 52 on one side near the annular connection part 61 and a plug slot 53 on the other side.

[0031] The annular connecting part 61 is threadedly connected to the external screw through the fixed connecting hole 62 to achieve rigid fixation between the outer shell 1 and the external component; the fixing ring 51 of the fixed connecting assembly 5 is connected to the external screw through the locking hole 52 to form a double fixation to avoid connection failure. Secondly, the insertion slot 53 positions the insertion positioning part 44 at one end of the inner shell body 41 to ensure connection stability under braking impact.

[0032] Preferably, the inner shell body 41 is provided with an insertion positioning part 44 that is inserted into the positioning slot 31 at one end away from the heat dissipation extension 42.

[0033] In addition, there is an annular heat dissipation cavity 7 between the fixed ring body 51 and the annular connecting part 61.

[0034] In summary, the principle of this embodiment is as follows: the airflow is enhanced by the heat dissipation and exhaust structure 2 and the annular heat dissipation cavity 7, and the heat dissipation fins 43 of the heat dissipation inner shell mechanism 4 expand the heat dissipation area, which together improves the heat dissipation performance and reduces the internal temperature of the outer shell 1; the snap-fit ​​positioning component 3 cooperates with the insertion slot 53 on the fixing ring 51 to achieve effective positioning of the inner shell and the outer shell; secondly, the fixing connection hole 62 on the locking connection mechanism 6 and the locking hole 52 on the fixing ring 51 are double-locked with the external screw, thereby improving the connection stability and structural stability.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0036] Although this document frequently uses terms such as outer shell 1, first annular portion 11, second annular portion 12, third annular portion 13, snap-fit ​​seat 14, connecting seat 15, heat dissipation and exhaust structure 2, first exhaust hole 21, second exhaust hole 22, third exhaust hole 23, snap-fit ​​positioning assembly 3, positioning slot 31, snap-fit ​​part 32, pressing part 33, heat dissipation inner shell mechanism 4, inner shell body 41, heat dissipation extension part 42, heat sink 43, insertion positioning part 44, fixed connection assembly 5, fixed ring 51, locking hole 52, insertion slot 53, locking connection mechanism 6, annular connection part 61, fixed connection hole 62, and heat dissipation cavity 7, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A bimetallic brake drum steel shell structure, comprising an outer shell (1), wherein the outer wall of the outer shell (1) is provided with a heat dissipation and exhaust structure (2) communicating with its inner side, characterized in that, The outer shell (1) is connected to a heat dissipation inner shell mechanism (4) via a snap-fit ​​positioning component (3) on its inner circumferential side, and a fixed connection component (5) is provided at one end of the outer shell (1). A locking connection mechanism (6) is provided on the inner circumferential side of the outer shell (1) near the fixed connection component (5).

2. The bimetallic brake drum steel shell structure according to claim 1, characterized in that, The outer shell (1) includes a first annular portion (11), a second annular portion (12) and a third annular portion (13) arranged sequentially. The first annular portion (11), the second annular portion (12) and the third annular portion (13) are integrally formed. A snap-fit ​​seat (14) is provided at the end of the first annular portion (11) away from the second annular portion (12), and a connecting seat (15) is provided at the end of the third annular portion (13) away from the second annular portion (12).

3. The bimetallic brake drum steel shell structure according to claim 2, characterized in that, The heat dissipation and exhaust structure (2) includes several first exhaust holes (21) arranged circumferentially on both sides of the first annular portion (11), several second exhaust holes (22) arranged circumferentially on one side of the second annular portion (12), and several third exhaust holes (23) arranged circumferentially on one side of the third annular portion (13).

4. The bimetallic brake drum steel shell structure according to claim 3, characterized in that, The first exhaust port (21), the second exhaust port (22), and the third exhaust port (23) are staggered.

5. The bimetallic brake drum steel shell structure according to claim 2, characterized in that, The heat dissipation inner shell mechanism (4) includes an inner shell body (41), and a heat dissipation extension (42) extending outward toward the first annular portion (11) is provided on one side of the inner shell body (41), and a plurality of heat dissipation fins (43) are embedded in the circumferential outer wall of the heat dissipation extension (42).

6. The bimetallic brake drum steel shell structure according to claim 5, characterized in that, The snap-fit ​​positioning component (3) includes a positioning slot (31) disposed on the inner side of the first annular portion (11), a snap-fit ​​portion (32) is formed on the inner side of the second annular portion (12) away from the first annular portion (11), and a pressing portion (33) is formed on the inner side of the third annular portion (13) away from the second annular portion (12).

7. The bimetallic brake drum steel shell structure according to claim 5, characterized in that, The locking connection mechanism (6) includes an annular connection part (61) with one end face of the connection seat (15), and the annular connection part (61) is provided with a plurality of fixed connection holes (62) for external screw thread connection.

8. The bimetallic brake drum steel shell structure according to claim 7, characterized in that, The fixed connection assembly (5) includes a fixed ring (51) disposed on the inner side of the outer shell (1) in the circumferential direction. The fixed ring (51) has a locking hole (52) on one side near the annular connection part (61) and a plug-in slot (53) on the other side.

9. The bimetallic brake drum steel shell structure according to claim 8, characterized in that, The inner shell body (41) is provided with an insertion positioning part (44) that is inserted into the positioning slot (31) at one end away from the heat dissipation extension (42).

10. The bimetallic brake drum steel shell structure according to claim 9, characterized in that, The fixed ring (51) and the annular connecting part (61) have an annular heat dissipation cavity (7).

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