braking device

Abstract

The application relates to a brake device which comprises a driving part, a brake wheel, a brake belt assembly, a hanging seat, an adjusting seat, a floating seat, a first elastic member, a second elastic member and an adjusting assembly. The hanging seat is located on the side of the brake belt assembly far from the brake wheel. The floating seat is located between the hanging seat and the adjusting seat, is connected with the outer circumferential side of the brake belt assembly, is located above the center of the brake wheel, and provides upward hanging force for the brake belt assembly when the brake belt assembly is in a relief position. The first elastic member is arranged between the hanging seat and the floating seat, and the second elastic member is arranged between the floating seat and the adjusting seat. The adjusting assembly is connected with the hanging seat and the adjusting seat respectively, can adjust the distance between the adjusting seat and the hanging seat, changes the compression amount of the first elastic member and the second elastic member, and adjusts the hanging force of the floating seat on the brake belt assembly. The application solves the problems that the installation space is too large and the hanging force cannot be adjusted in the prior art.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of rail transit, and particularly relates to a brake device. BACKGROUND

[0002] In order to effectively brake and release, the brake torque and the shoe gap (the gap between the brake band and the brake drum) are the main indicators affecting the performance of the existing band brake device. In the release state of the band brake device, the brake shoe should maintain a certain gap with the brake drum to avoid the adverse effects of unnecessary friction, such as abnormal wear of the brake shoe and reduction of service life. However, due to the gravity of the brake band, part of the brake shoe will be attached to the wheel, causing different degrees of eccentric wear of the brake shoe and affecting the service life of the brake shoe.

[0003] In the prior art, in order to prevent the brake shoe from being attached to the wheel due to gravity, multiple supports and positioning points are usually added below and above the brake band to ensure the shoe gap. However, due to the extremely limited installation space of the vehicle running part, the multiple supports and positioning points will occupy a large amount of installation space, and the force of the supports and positioning points on the brake band is a fixed value, which cannot be adjusted according to the weight of the brake band and the impact force of the external environment, and the adaptability is poor.

[0004] Therefore, in the prior art, there is a technical problem that the supports and positioning points of the brake device occupy a large space, and the force of the supports and positioning points on the brake band in the direction away from the brake drum cannot be adjusted. SUMMARY

[0005] In view of the deficiencies in the related art, the present application provides a brake device.

[0006] The present application provides a brake device, comprising a driving part, a brake wheel, a brake band assembly, a hanging seat, an adjusting seat, a floating seat, a first elastic member, a second elastic member and an adjusting assembly, wherein the brake band assembly is located on the outer peripheral side of the brake wheel, the brake band assembly has a brake position abutting the brake wheel and a release position spaced from the brake wheel; the driving part is drivingly connected with the brake band assembly to drive the brake band assembly to switch between the brake position and the release position; the hanging seat is located on the side of the brake band assembly away from the brake wheel; the floating seat is located between the hanging seat and the adjusting seat, the floating seat is connected with the outer peripheral side of the brake band assembly, and the floating seat is located above the center of the brake wheel; when the brake band assembly is in the release position, the floating seat provides an upward hanging force for the brake band assembly; the first elastic member is arranged between the hanging seat and the floating seat, and the second elastic member is arranged between the floating seat and the adjusting seat; the adjusting assembly is connected with the hanging seat and the adjusting seat respectively, and the adjusting assembly can adjust the distance between the adjusting seat and the hanging seat, so that the compression amount of the first elastic member and the second elastic member changes, to adjust the hanging force of the floating seat on the brake band assembly.

[0007] Preferably, the hanging seat and the adjusting seat are respectively provided with first spring installation grooves at one end facing the floating seat, the floating seat is respectively provided with second spring installation grooves at two ends, the two ends of the first elastic member are respectively installed in the first spring installation grooves of the hanging seat and the second spring installation grooves of the floating seat, and the two ends of the second elastic member are respectively installed in the first spring installation grooves of the adjusting seat and the second spring installation grooves of the floating seat.

[0008] Preferably, the adjusting assembly comprises a pull rod bolt and a locking nut, the pull rod bolt comprises a limiting end and a guide column, the limiting end is limited on the hanging seat, and the guide column passes through the hanging seat, the first elastic member, the floating seat, the second elastic member and the adjusting seat in sequence; the locking nut is screw-installed on the guide column, the end of the adjusting seat away from the second elastic member is limited by the locking nut, the locking nut can be adjusted along the guide column, the compression amount of the first elastic member and the second elastic member is changed, and the hanging force of the floating seat on the brake belt assembly is adjusted.

[0009] Preferably, the floating seat is provided with a guide hole, the diameter of the guide hole is greater than the diameter of the guide column and less than the diameters of the first elastic member and the second elastic member, and the floating seat can float in the axial and radial directions of the guide column.

[0010] Preferably, when the brake belt assembly is switched from the relief position to the braking position, the brake belt assembly drives the floating seat to move towards the brake wheel, and the first elastic member and the second elastic member are elastically deformed in the axial and radial directions; when the brake belt assembly is switched from the braking position to the relief position, the rebound force of the first elastic member and the second elastic member drives the floating seat and the brake belt assembly to move away from the brake wheel.

[0011] Preferably, the floating seat comprises a seat body and a reinforcing part, the first elastic member and the second elastic member are respectively arranged at two ends of the seat body, and the reinforcing part is connected to the seat body and the outer circumferential side of the brake belt assembly, and the cross section of the reinforcing part gradually increases from the seat body to the brake belt assembly.

[0012] Preferably, the rigidity of the first elastic member is less than the rigidity of the second elastic member.

[0013] Preferably, the brake belt assembly comprises an upper brake belt and a lower brake belt, one end of the upper brake belt is hingedly connected to one end of the lower brake belt, the other end of the upper brake belt and the other end of the lower brake belt are respectively connected to the driving part, and the upper brake belt is connected to the floating seat.

[0014] Preferably, the brake device further comprises a fixing frame, and the fixing frame is connected to the end of the hanging seat away from the brake belt assembly.

[0015] Preferably, the floating seat is located below the hanging seat and above the adjusting seat.

[0016] Based on the above technical scheme, the hanging seat, the adjusting seat, the floating seat, the first elastic member, the second elastic member and the adjusting assembly of the brake device are connected to form the anti-wheel-sticking structure, the floating seat is floatingly arranged between the hanging seat and the adjusting seat, the floating seat provides upward hanging force for the brake belt assembly when the brake belt assembly is located at the relief position, and the brake belt assembly is prevented from sticking to the brake wheel due to its own gravity; the adjusting assembly can adjust the distance between the adjusting seat and the hanging seat, so that the compression amount of the first elastic member and the second elastic member changes, the hanging force of the floating seat on the brake belt assembly is adjusted according to the gap requirement between the brake belt assembly and the brake wheel during normal operation, and the anti-wheel-sticking structure can output appropriate hanging force. Compared with the prior art, the following technical advantages are achieved:

[0017] 1. The floating seat of the brake device provides appropriate hanging force for the brake belt assembly, prevents the brake belt from sticking to the brake wheel due to its own gravity, and thus causes the brake pad to be abnormally worn to different degrees and affect the service life of the brake pad.

[0018] 2. The hanging force can be adjusted in size to adapt to brake belt assemblies of different weights and impact forces of different sizes.

[0019] 3. The anti-wheel-sticking structure can provide better rigidity through the adjusting assembly, avoids the brake belt assembly from sticking to the brake wheel due to vibration impact of the deformation part during high-speed operation of the vehicle, and effectively avoids abnormal wear and heat load risk of the brake pad.

[0020] 4. The floating seat can float in the axial and radial directions to provide vertical hanging force for the brake belt assembly, and the freedom degree in the direction of the braking force is not constrained, which effectively avoids the adverse effects of the braking force on the anti-wheel-sticking structure and improves the service life.

[0021] 5. The anti-wheel-sticking structure is simple, convenient and fast. DETAILED DESCRIPTION

[0022] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application in any way. In the drawings:

[0023] Figure 1 is a structural schematic view of an embodiment of the brake device of the application (the brake belt assembly 3 is located at the relief position);

[0024] Figure 2 is a structural schematic view of the brake device from a side view angle;

[0025] Figure 3 is Figure 1 is an enlarged structural schematic view of the brake device in the A position in

[0026] Figure 4 Structure diagram of floating seat of brake device of the present application;

[0027] Figure 5 Structure diagram of cross section of floating seat in Figure 4 at B-B line.

[0028] In the drawings:

[0029] 1, driving part; 2, brake wheel; 3, brake belt assembly; 31, upper brake belt; 32, lower brake belt; 4, hanging seat; 5, adjusting seat; 6, floating seat; 61, guide hole; 62, seat body; 63, reinforcing part; 7, first elastic member; 8, second elastic member; 9, adjusting assembly; 91, pull rod bolt; 911, limiting end; 912, guide column; 92, locking nut; 10, first spring mounting groove; 20, second spring mounting groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that the terms “center”, “transverse”, “longitudinal”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] The terms “first”, “second”, “third” are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with “first”, “second”, “third” can explicitly or implicitly include one or more of the features.

[0033] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] In order to solve the problem that the support and positioning point of the brake device in the prior art occupies large space, and the force of the brake band away from the brake drum direction cannot be adjusted, the present application provides a brake device.

[0035] As shown in the accompanying drawings Figures 1 to 5 The brake device comprises a driving part 1, a brake wheel 2, a brake band assembly 3, a hanging seat 4, an adjusting seat 5, a floating seat 6, first and second elastic members 7 and 8, and an adjusting assembly 9. The brake band assembly 3 is located on the outer peripheral side of the brake wheel 2, and has a brake position abutting against the brake wheel 2 and a relief position spaced from the brake wheel 2. The driving part 1 is drivingly connected with the brake band assembly 3 to drive the brake band assembly 3 to switch between the brake position and the relief position. The hanging seat 4 is located on the side of the brake band assembly 3 away from the brake wheel 2. The floating seat 6 is located between the hanging seat 4 and the adjusting seat 5, and is connected with the outer peripheral side of the brake band assembly 3. The floating seat 6 is located above the center of the brake wheel 2, and provides upward hanging force for the brake band assembly 3 when the brake band assembly 3 is in the relief position. The first elastic member 7 is arranged between the hanging seat 4 and the floating seat 6, and the second elastic member 8 is arranged between the floating seat 6 and the adjusting seat 5. The adjusting assembly 9 is connected with the hanging seat 4 and the adjusting seat 5, respectively. The adjusting assembly 9 can adjust the distance between the adjusting seat 5 and the hanging seat 4, so that the compression amount of the first and second elastic members 7 and 8 changes, to adjust the hanging force of the floating seat 6 on the brake band assembly 3.

[0036] The present application forms the anti-wheel-sticking structure by matching and connecting the hanging seat 4, the adjusting seat 5, the floating seat 6, the first elastic member 7, the second elastic member 8 and the adjusting assembly 9 of the brake device, the floating seat 6 is movably arranged between the hanging seat 4 and the adjusting seat 5, the floating seat 6 provides upward hanging force for the brake band assembly 3 when the brake band assembly 3 is in the relief position, prevents the brake band assembly 3 from sticking to the brake wheel due to its own gravity, and thus causes the brake band to be worn in different degrees, thereby affecting the service life of the brake band; the adjusting assembly 9 can adjust the distance between the adjusting seat 5 and the hanging seat 4, so that the compression amount of the first elastic member 7 and the second elastic member 8 changes, so as to adjust the hanging force of the floating seat 6 on the brake band assembly 3 according to the gap requirement between the brake band assembly 3 and the brake wheel 2 during normal operation, the impact force of the brake band assembly 3 and the vehicle, and ensure that the anti-wheel-sticking structure outputs appropriate hanging force.

[0037] As shown in the accompanying drawings, Figure 3 The first spring mounting groove 10 is arranged at one end of the hanging seat 4 and the adjusting seat 5 towards the floating seat 6, the second spring mounting groove 20 is arranged at both ends of the floating seat 6, the first elastic member 7 is arranged in the first spring mounting groove 10 of the hanging seat 4 and the second spring mounting groove 20 of the floating seat 6, and the second elastic member 8 is arranged in the first spring mounting groove 10 of the adjusting seat 5 and the second spring mounting groove 20 of the floating seat 6. In this way, the first spring mounting groove 10 of the hanging seat 4 and the second spring mounting groove 20 of the floating seat 6 together limit the first elastic member 7 in the axial and radial directions, the first spring mounting groove 10 of the adjusting seat 5 and the second spring mounting groove 20 of the floating seat 6 together limit the second elastic member 8 in the axial and radial directions, and the end of the first elastic member 7 close to the floating seat 6 and the end of the second elastic member 8 close to the floating seat 6 can move together with the floating seat 6.

[0038] As shown in the accompanying drawings, Figure 3 The adjusting assembly 9 includes a pull rod bolt 91 and a locking nut 92, the pull rod bolt 91 includes a limiting end 911 and a guide column 912, the limiting end 911 is limited on the hanging seat 4, and the guide column 912 passes through the hanging seat 4, the first elastic member 7, the floating seat 6, the second elastic member 8 and the adjusting seat 5 in sequence, and the locking nut 92 is screwed on the guide column 912, the end of the adjusting seat 5 away from the second elastic member 8 is limited by the locking nut 92, and the locking nut 92 can be adjusted along the guide column 912, so that the compression amount of the first elastic member 7 and the second elastic member 8 changes, and the hanging force of the floating seat 6 on the brake band assembly 3 is adjusted. In this way, the compression force of the first elastic member 7 and the second elastic member 8 can be adjusted by only tightening or loosening the locking nut 92, the operation is simple and convenient, both ends of the floating seat 6 have elastic members, and the floating seat 6 has good floating effect.

[0039] When the locking nut 92 is tightened manually or with a tool, the overall rigidity of the anti-sticking wheel structure increases. During high-speed vehicle operation, this effectively prevents the brake band assembly 3 from sticking to the brake wheel due to vibration and impact, thereby reducing abnormal wear, uneven wear, and the risk of thermal load on the friction pair. Furthermore, it ensures that the brake band assembly 3 remains disengaged from the high-speed rotating brake wheel 2, maintaining a constant brake pad clearance and preventing unnecessary sticking.

[0040] It should be noted that, in this embodiment, the end of the hanging seat 4 away from the first spring mounting groove 10 is provided with a tie rod bolt mounting hole, and the limiting end 911 of the tie rod bolt 91 is limited in the tie rod bolt mounting hole.

[0041] As attached Figure 4 and Figure 5 As shown, the floating seat 6 has a guide hole 61, the diameter of which is larger than the diameter of the guide post 912 and smaller than the diameters of the first elastic member 7 and the second elastic member 8. The floating seat 6 can float along the axial and radial directions of the guide post 912. In this way, the first elastic member 7 and the second elastic member 8 can be limited at both ends of the axial direction of the floating seat 6, preventing interference between the first elastic member 7 and the second elastic member 8.

[0042] It should be noted that, in this embodiment, the diameter D of the guide hole 61 is determined according to the retraction stroke ε when the brake band assembly 3 is in the release position, and is limited to the radial deflection value ±r allowed by the cylindrical helical compression spring.

[0043] To prevent abnormal brake pad contact with the wheel caused by vibration and impact during vehicle movement, the overall stiffness coefficient K of the anti-contact wheel structure is determined based on the overall mass m of the brake band assembly 3, the vehicle's operating speed level V, and the vibration and impact magnitude a of the running gear.

[0044] As attached Figure 1 As shown, the brake band assembly 3 includes an upper brake band 31 and a lower brake band 32. One end of the upper brake band 31 is hinged to one end of the lower brake band 32, and the other ends of the upper brake band 31 and the lower brake band 32 are respectively connected to the drive unit 1. The upper brake band 31 is connected to the floating seat 6. In this way, the floating seat 6 provides an upward suspending force for the upper brake band 31, and the arrangement of the upper and lower brake bands can meet the needs of the large-sized brake wheel 2.

[0045] Preferably, the upper brake band 31 and the lower brake band 32 are connected by a pin.

[0046] As attached Figure 1As shown, when the brake band assembly 3 is switched from the relief position to the braking position, the brake band assembly 3 drives the floating seat 6 to move towards the brake wheel 2, and the axial and radial elastic deformation of the first elastic member 7 and the second elastic member 8 occurs; when the brake band assembly 3 is switched from the braking position to the relief position, the rebound force of the axial and radial elastic deformation of the first elastic member 7 and the second elastic member 8 drives the floating seat 6 and the brake band assembly 3 to move away from the brake wheel 2. In this way, the rebound force of the first elastic member 7 and the second elastic member 8 can ensure that the brake band assembly 3 quickly separates from the brake wheel 2, preventing the wear of the brake pad. The floating seat 6 mainly provides the vertical lifting force for the brake band assembly 3, and has displacement compensation in the horizontal direction, so that the hanging seat 4 and the adjusting seat 5 are not affected by the braking force of the driving part 1, the overall structure is more reliable, and the service life is longer.

[0047] It should be noted that the upper brake band 31 and the lower brake band 32 are respectively composed of a semicircular band body and a plurality of brake pads, preferably, the band body is made of flexible material, and the brake pads are made of rigid material, and the brake pads are arranged on the inner circumferential surface of the band body at intervals, and when the brake band assembly 3 is in the braking position, the brake pads are in friction with the brake wheel 2 to slow down.

[0048] Preferably, as shown in the drawings, Figure 2 The brake wheel 2 corresponds to the brake band assembly 3, and two groups of anti-sticking wheel structures are correspondingly provided.

[0049] As shown in the drawings, Figure 4 and Figure 5 The floating seat 6 includes a seat body 62 and a reinforcing portion 63, wherein the first elastic member 7 and the second elastic member 8 are respectively arranged at two ends of the seat body 62; the reinforcing portion 63 connects the seat body 62 and the outer circumferential side of the brake band assembly 3, and the cross section of the reinforcing portion 63 gradually increases from the seat body 62 to the brake band assembly 3. In this way, the provision of the reinforcing portion 63 can increase the contact area between the floating seat 6 and the upper brake band 31, ensure the reliability of the connection between the floating seat 6 and the upper brake band 31, and enhance the overall strength of the floating seat 6, thereby improving the service life.

[0050] Preferably, the reinforcing portion 63 of the floating seat 6 is connected with the brake band assembly 3 by welding.

[0051] Preferably, the rigidity of the first elastic member 7 is smaller than that of the second elastic member 8. In this way, the floating seat 6 can provide sufficient hanging force for the brake band assembly 3.

[0052] It should be noted that in the embodiment, the brake device further includes a fixing frame connected with one end of the hanging seat 4 away from the brake band assembly 3. In this way, the hanging seat 4 serves as the base of the entire anti-sticking wheel structure, and mainly bears the gravity of the brake band assembly 3 in the relief state.

[0053] It should be noted that in the embodiment, the fixing frame is fixedly connected with the hanging seat 4 by welding or bolts.

[0054] As shown in the accompanying drawings, the floating seat 6 is located below the hanging seat 4 and above the adjusting seat 5. Figure 1

[0055] It should be noted that in the embodiment, as shown in the accompanying drawings, the brake band assembly 3 is located at the relief position, and the driving part 1 and the floating seat 6 are located at opposite sides of the brake band assembly 3. When the driving part 1 is counterclockwise rotated, the brake band assembly 3 is switched from the relief position to the brake position. Figure 1

[0056] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: the present application forms the anti-wheel-sticking structure by cooperating and connecting the hanging seat 4, the adjusting seat 5, the floating seat 6, the first elastic member 7, the second elastic member 8 and the adjusting assembly 9 of the brake device. The floating seat 6 is floatingly arranged between the hanging seat 4 and the adjusting seat 5. When the brake band assembly 3 is located at the relief position, the floating seat 6 provides upward hanging force for the brake band assembly 3, preventing the brake band assembly 3 from sticking to the brake wheel due to its own gravity, so that the brake band is partially worn, affecting the service life of the brake band. The adjusting assembly 9 can adjust the distance between the adjusting seat 5 and the hanging seat 4, so that the compression amount of the first elastic member 7 and the second elastic member 8 changes, so as to adjust the hanging force of the floating seat 6 on the brake band assembly 3 according to the gap requirement between the brake band assembly 3 and the brake wheel 2 during normal operation, the impact force of the brake band assembly 3 and the vehicle, and the size of the brake band assembly 3 with different weights, so as to ensure that the anti-wheel-sticking structure outputs appropriate hanging force.

[0057] Finally, it should be noted that: in the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts of each embodiment can be referred to.

[0058] The above embodiments are only used to illustrate the technical solutions of the present application but not limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.​​

Claims

1. A braking device, characterized in that, include: Drive unit (1); Brake wheel (2); Brake band assembly (3) is located on the outer periphery of the brake wheel (2). The brake band assembly (3) has a braking position that is in contact with the brake wheel (2) and a release position that is spaced apart from the brake wheel (2). The drive unit (1) is driven to connect with the brake band assembly (3) to drive the brake band assembly (3) to switch between the braking position and the release position. Hanging seat (4), the hanging seat (4) is located on the side of the brake band assembly (3) away from the brake wheel (2); Adjustment seat (5); A floating seat (6) is located between the hanging seat (4) and the adjusting seat (5). The floating seat (6) is connected to the outer periphery of the brake band assembly (3). The floating seat (6) is located above the center of the brake wheel (2). When the brake band assembly (3) is in the release position, the floating seat (6) provides an upward hanging force to the brake band assembly (3). The first elastic element (7) and the second elastic element (8) are provided between the hanging seat (4) and the floating seat (6), and the second elastic element (8) is provided between the floating seat (6) and the adjusting seat (5). An adjusting component (9) is connected to the hanging seat (4) and the adjusting seat (5) respectively. The adjusting component (9) can adjust the distance between the adjusting seat (5) and the hanging seat (4) to change the compression of the first elastic element (7) and the second elastic element (8) to adjust the hanging force of the floating seat (6) on the brake band assembly (3). The adjusting component (9) includes: Tie rod bolt (91), the tie rod bolt (91) includes a limiting end (911) and a guide post (912), the limiting end (911) is limited on the hanging seat (4), and the guide post (912) passes through the hanging seat (4), the first elastic element (7), the floating seat (6), the second elastic element (8) and the adjusting seat (5) in sequence; A locking nut (92) is screwed onto the guide post (912). The end of the adjusting seat (5) away from the second elastic member (8) is limited by the locking nut (92). The locking nut (92) can be adjusted along the guide post (912) to change the compression of the first elastic member (7) and the second elastic member (8) in order to adjust the hanging force of the floating seat (6) on the brake band assembly (3). The floating seat (6) has a guide hole (61) with a diameter greater than that of the guide post (912) and smaller than that of the first elastic member (7) and the second elastic member (8). The floating seat (6) is able to float along the axial and radial directions of the guide post (912).

2. The braking device according to claim 1, characterized in that, The hanging seat (4) and the adjusting seat (5) are respectively provided with a first spring mounting groove (10) at one end facing the floating seat (6), and the two ends of the floating seat (6) are respectively provided with a second spring mounting groove (20). The two ends of the first elastic member (7) are respectively installed in the first spring mounting groove (10) of the hanging seat (4) and the second spring mounting groove (20) of the floating seat (6), and the two ends of the second elastic member (8) are respectively installed in the first spring mounting groove (10) of the adjusting seat (5) and the second spring mounting groove (20) of the floating seat (6).

3. The braking device according to claim 1 or 2, characterized in that, During the process of the brake band assembly (3) switching from the release position to the braking position, the brake band assembly (3) drives the floating seat (6) to move towards the brake wheel (2), and the first elastic member (7) and the second elastic member (8) undergo elastic deformation in both the axial and radial directions. During the process of the brake band assembly (3) switching from the braking position to the release position, the axial and radial rebound forces of the first elastic element (7) and the second elastic element (8) drive the floating seat (6) and the brake band assembly (3) to move away from the brake wheel (2).

4. The braking device according to claim 1 or 2, characterized in that, The floating seat (6) includes: The seat body (62) has the first elastic element (7) and the second elastic element (8) respectively disposed at both ends of the seat body (62); The reinforcing part (63) connects the outer periphery of the seat body (62) and the brake band assembly (3), and the cross-section of the reinforcing part (63) gradually increases from the seat body (62) to the brake band assembly (3).

5. The braking device according to claim 1 or 2, characterized in that, The rigidity of the first elastic element (7) is less than that of the second elastic element (8).

6. The braking device according to claim 1 or 2, characterized in that, The brake band assembly (3) includes an upper brake band (31) and a lower brake band (32). One end of the upper brake band (31) is hinged to one end of the lower brake band (32). The other end of the upper brake band (31) and the other end of the lower brake band (32) are respectively connected to the drive unit (1). The upper brake band (31) is connected to the floating seat (6).

7. The braking device according to claim 1 or 2, characterized in that, The braking device also includes a fixing frame, which is connected to the end of the hanger (4) away from the brake band assembly (3).

8. The braking device according to claim 1 or 2, characterized in that, The floating seat (6) is located below the hanging seat (4) and above the adjusting seat (5).

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