Roller brake with automatic return of brake pad and vehicle

Abstract

The present invention discloses a roller brake and a vehicle with automatic return of brake pads; the roller brake with automatic return of brake pads comprises a plurality of brake pads and a tightening elastic member; the tightening elastic member is annular; wherein, a receiving groove for accommodating the tightening elastic member is further provided on the outer arc-shaped peripheral wall of at least one brake pad, and the tightening elastic member is sleeved outside the plurality of brake pads. The roller brake and the vehicle with automatic return of brake pads provided by the present invention solve the problem that the existing brake pads do not return or fail to return to their proper positions.

Description

Technical Field

[0001] The invention relates to the technical field of vehicles, and in particular to a roller brake with automatic return of brake pads and a vehicle. Background Art

[0002] The brake device of a vehicle (including a bicycle, a bike or an electric vehicle, etc.) is a device that uses a brake structure to brake the vehicle; therefore, the brake device is an important structural device of the vehicle. There are many types of brake devices for the above-mentioned vehicles, such as roller brakes, disc brakes and drum brakes.

[0003] Among them, roller brake is a brake system designed for urban leisure vehicles, which has the advantages of extremely high efficiency, fast braking response speed, easy operation and low failure rate. In the traditional roller brake structure, the traditional roller brake is mainly composed of a pull rod, the innermost gear-shaped steel ring, the middle layer of cylindrical steel balls (usually six), the outer layer of brake pads (usually three arc-shaped structures), and the outermost sleeved brake drum. In this way, when the roller brake is braking; first, the brake cable drives the pull rod to move, and then the gear-shaped steel ring is rotated to a certain angle, the innermost gear-shaped steel ring rotates, and the outer protruding teeth (or protrusions) lift each cylindrical steel ball, so that each (six) cylindrical steel ball expands outward, and the diameter of the structure range surrounded by the cylindrical steel balls increases; after the diameter increases outward, the cylindrical steel ball is forced to contact with multiple (three) brake pads, and the brake pads are also expanded to the outer layer. At this time, multiple brake pads move outward at the same time for a certain distance; finally, the brake pads are forced to contact with the inner wall of the outermost brake drum to achieve the braking effect.

[0004] In general, during each braking action, multiple brake pads will be pushed to expand outward at the same time, and finally touch the inner circumferential wall of the brake drum to perform friction contact braking; after the braking action is completed, the innermost gear-shaped steel ring rotates in the opposite direction, and the recessed part around the outer protruding teeth and the gear-shaped steel ring, and the cylindrical ball return to their original positions (i.e., shrink inward), and multiple brake pads will also return to their original positions. However, studies have found that the brake pads of existing roller brakes often have problems of incomplete or no return to their original positions. This will cause the brake pads to slightly touch the inner circumferential wall of the brake drum, causing unnecessary wear of the brake pads; at the same time, this will also cause the braking effect of the brake pads to decrease after the brake cable is tightened and pulled next time. Therefore, due to the above-mentioned structural defects, the service life and braking performance of traditional roller brakes have been reduced. Summary of the invention

[0005] The object of the present invention is to provide a roller brake and a vehicle with a brake pad that automatically returns to its original position, so as to solve the problem that the existing brake pad does not return to its original position or does not return to its original position properly.

[0006] The present invention provides a roller brake with automatic return of brake pads, comprising a plurality of brake pads and a tightening elastic member; the tightening elastic member is annular;

[0007] Among them, an accommodating groove for accommodating a tightening elastic member is further provided on the outer arc-shaped peripheral wall of at least one brake pad, and the tightening elastic member is sleeved outside the plurality of brake pads.

[0008] Preferably, as a feasible implementation scheme, a plurality of brake pads are provided with receiving grooves on their outer arc-shaped peripheral walls, and the receiving grooves extend along the outer circumferential direction of the brake pads.

[0009] Preferably, as an implementable embodiment, the tightening elastic member is any one of a tightening spring, an engineering plastic tightening belt, and a rubber tightening belt.

[0010] Preferably, as a feasible implementation scheme, the tightening elastic member is a tightening tension spring.

[0011] Preferably, as an implementable embodiment, the surface of the tension spring is coated with anti-rust paint.

[0012] Preferably, as a feasible implementation scheme, along the depth direction of the accommodating groove, the tightening elastic member is completely located in the accommodating groove.

[0013] Preferably, as an implementable embodiment, the roller brake with automatic return of the brake pad also includes a brake drum; and an annular groove is also designed on the inner circumferential wall of the brake drum.

[0014] Preferably, as an implementable embodiment, the position of the annular groove corresponds to the position of the receiving groove on the brake pad.

[0015] Preferably, as an implementable embodiment, the depth dimension of the annular groove is greater than the height dimension of the tightening elastic member.

[0016] Preferably, as an implementable embodiment, a wear-resistant coating is provided on the inner circumferential wall of the brake drum and the outer arc-shaped circumferential wall of the brake pad.

[0017] Preferably, as an implementable embodiment, the wear-resistant coating is any one of a tungsten carbide alloy coating, a chromium silicide hard wear-resistant coating, and a ceramic wear-resistant coating.

[0018] Preferably, as an implementable embodiment, the brake pad is specifically a metal brake pad or an asbestos fiber brake pad.

[0019] Correspondingly, the present invention also provides a vehicle, comprising a vehicle body and a roller brake with a brake pad automatically returning to its original position arranged on the vehicle body.

[0020] Preferably, as an implementable embodiment, the brake drum is bolted to the vehicle body.

[0021] Preferably, as an implementable embodiment; the vehicle also includes a locking bolt; a plurality of bolt through holes and an axis through hole are provided on the inner surface of the brake drum; the axis through hole is used to pass the rotating shaft; the locking bolt is used to pass through the bolt through hole on the inner surface of the brake drum and then be connected to the vehicle body bolt.

[0022] Preferably, as an implementable solution, the number of bolt through holes and locking bolts are both multiple, and the multiple bolt through holes are spaced and distributed on a circular trajectory centered on the shaft through hole.

[0023] The roller brake with automatic return of brake pads has the following advantages:

[0024] The present invention relates to a roller brake with automatic return of brake pads, in which a receiving groove is provided on the outer edge (or outer peripheral wall) of each brake pad, and a tightening elastic member is designed in combination. The specific assembly relationship is that the tightening elastic member is sleeved on the outer peripheral walls of multiple brake pads and embedded in the corresponding receiving groove. In itself, the tightening elastic member is an elastic body that can freely realize elastic deformation.

[0025] In this way, when the brake is applied, multiple brake pads expand outward at the same time, and the tightening elastic member is stretched and deformed. When the braking force disappears, the tightening elastic member will recover its deformation, shrink inward and drive multiple brake pads to tighten inward at the same time, thereby achieving the technical effect of assisting automatic return. The roller brake with automatic return of brake pads designed by the present invention overcomes the technical defects of the prior art that the brake pads are difficult to return to their original position or cannot be returned to their original position.

[0026] On the other hand, the present invention also relates to a vehicle; the vehicle comprises the above-mentioned roller brake with automatic return of the brake pad. Based on the above principle, the vehicle designed by the present invention also has the technical effect of assisting the automatic return of the brake pad.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of a three-dimensional exploded structure of a roller brake with automatic return of brake pads provided in the first embodiment of the present invention from one perspective;

[0030] Figure 2A schematic diagram of a three-dimensional exploded structure of a roller brake with automatic return of brake pads provided in the first embodiment of the present invention from another perspective;

[0031] Figure 3 for Figure 1 A schematic diagram of a partial structure of a roller brake with automatic return of brake pads provided in the first embodiment of the present invention;

[0032] Figure 4 for Figure 1 A parts diagram of a brake pad in a roller brake with automatic return of the brake pad provided in the first embodiment of the present invention;

[0033] Figure 5 for Figure 1 A parts diagram of a tightening elastic member in a roller brake with automatic return of brake pads provided in the first embodiment of the present invention;

[0034] Figure 6 for Figure 1 A parts diagram of a brake drum in a roller brake with automatic return of brake pads provided in embodiment 1 of the present invention.

[0035] Reference numerals:

[0036] Brake pad 1; receiving groove 11;

[0037] Tighten the elastic member 2;

[0038] Brake drum 3; annular groove 31; bolt through hole 32; shaft through hole 33;

[0039] Tie rod 4;

[0040] Gear-shaped steel ring 5;

[0041] Cylindrical steel balls6. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0043] Embodiment 1

[0044] like Figure 1, Figure 2 as well as Figure 3 As shown, the present invention provides a roller brake with automatic return of brake pads, including a plurality of brake pads 1 (see Figure 4 ) and the tightening elastic member 2 (see Figure 5 ); the elastic member 2 is annular; at the same time, it is also designed with a brake drum 3 (see Figure 6 ), a pull rod 4 (or brake rocker arm), a gear-shaped steel ring 5, a cylindrical steel ball 6 (including a fixing frame for stabilizing the circumferential steel ball);

[0045] Among them, at least one of the brake pads 1 is further provided with a receiving groove 11 on the outer arc-shaped peripheral wall, and the receiving groove 11 extends along the outer circumferential direction of the brake pad 1; the receiving groove 11 is used to embed the tightening elastic member 2.

[0046] The present invention relates to a roller brake with automatic return of brake pads, in which a receiving groove is provided on the outer edge (or outer peripheral wall) of each brake pad, and a tightening elastic member is designed in cooperation. The specific assembly relationship is that the tightening elastic member (i.e., preferably a tightening tension spring) is sleeved on the outer peripheral walls of multiple brake pads and embedded in the corresponding receiving groove. The tightening elastic member itself is an elastic body that can freely realize elastic deformation.

[0047] During the specific assembly, the tightening elastic member is assembled and connected in the receiving grooves of the outer circumferential walls of the plurality of brake pads;

[0048] In this way, when the roller brake is applied, the innermost gear-shaped steel ring rotates, and the gear lifts up each cylindrical steel ball, so that multiple (six) cylindrical steel balls expand outward, and the diameter of the structure surrounded by the cylindrical steel balls increases; after the diameter increases outward, the steel balls are forced to contact multiple brake pads or brake blocks (three), and the brake pads expand outward, and at this time, multiple brake pads move outward at the same time for a certain distance; finally, the brake pads are forced to contact the inner wall of the outermost brake drum to achieve the braking effect. In this process, the traditional technology may still fail to return the brake pad to its original position or return it to its original position incompletely after the brake is cancelled, which affects the braking effect next time; however, in this scheme, when the brake is applied, the tightening elastic member is affected by the outward expansion of the brake and is also stretched in circumference; when the braking force is lost, the force driving the brake pad to expand outward in diameter disappears, and at this time, the tightening elastic member has the force to tighten multiple brake pads (at this time, the tightening elastic member recovers the deformation), which will eventually drive multiple brake pads to return to their original position at the same time.

[0049] In addition, in the structure of the roller brake with automatic return of the brake pad, in addition to the improved brake pad 1 and brake drum 3, the structure of the tightening elastic member 2 is added, and other conventional structural designs are also included, such as: a pull rod 4 (or brake rocker arm), the innermost gear-shaped steel ring 5, the middle layer of cylindrical steel balls 6 (including a fixing frame for stabilizing the circumferential steel balls) and other structural designs. Among them, one end of the pull rod 4 is rotatably matched with the gear-shaped steel ring; multiple cylindrical steel balls 6 are distributed on the outer circumferential wall of the gear-shaped steel ring 5, and multiple brake pads 1 are assembled on the outside of multiple cylindrical steel balls 6; the brake drum 3 is sleeved on the outer layer of multiple cylindrical steel balls 6, and there is a gap between the inner circumferential wall of the brake drum 3 and multiple cylindrical steel balls 6; based on the above structure, the embodiment of the present invention utilizes the sleeve fit of the tightening elastic member on the brake pad and its own elastic properties to assist the automatic return operation of the brake pad after the braking action is released.

[0050] like Figure 5 As shown, the tightening elastic member 2 is any one of a tightening spring, an engineering plastic tightening belt, and a rubber tightening belt.

[0051] It should be noted that in the specific technical solution of the embodiment of the present invention, the tightening elastic member is an annular set, which is mainly sleeved on the outer circumferential wall of multiple brake pads and embedded in the accommodating groove of the brake pads. The tightening elastic member itself is an elastomer that can freely realize elastic deformation. Therefore, as long as it can realize elastic deformation and be easily processed into an annular belt shape, under this technical background, the tightening elastic body can preferably use a tightening spring or any one of an engineering plastic tightening belt and a rubber tightening belt. For example, the rubber tightening belt can be a high-strength rubber structural part to ensure that it has certain wear resistance and elastic toughness.

[0052] like Figure 5 As shown, the tightening elastic member 2 is a tightening tension spring.

[0053] It should be noted that in the specific technical solution of the embodiment of the present invention, the above-mentioned tightening elastic member is preferably a spring, and the spring is preferably a tension spring. The above-mentioned tightening tension spring can well achieve tensile deformation during braking (that is, as the annular tightening tension spring of the brake pad is stretched, the diameter becomes larger), and restore the deformation when the brake is released (that is, the brake pad loses the outward thrust and is affected by the contraction of the tightening tension spring and tightens inward. At this time, the tightening tension spring is locked and the diameter becomes smaller), thereby assisting the brake pad to automatically return to its original position.

[0054] like Figure 5 As shown, the surface of the tension spring is coated with anti-rust paint.

[0055] It should be noted that in the specific technical scheme of the embodiment of the present invention, the surface of the tension spring is also coated with an anti-corrosion coating; the setting of the above-mentioned anti-corrosion coating can enhance the corrosion resistance of the tension spring, improve the performance of the product, and ensure the structural strength and reliability of the tension spring.

[0056] like Figure 1 as well as Figure 4 As shown, along the depth direction of the receiving groove 11, the elastic sleeve 2 is completely located in the receiving groove 11. That is, the depth dimension of the receiving groove 11 is greater than the height dimension of the elastic sleeve 2, and the width dimension of the receiving groove 11 is greater than the width dimension of the elastic sleeve 2.

[0057] It should be noted that in the specific technical scheme of the embodiment of the present invention, the above-mentioned accommodating groove is opened on the outer peripheral wall of the brake pad. In order to ensure that the accommodating groove can better accommodate the above-mentioned tightening elastic part and avoid unnecessary wear of the tightening elastic part, it is necessary to make the depth and width of the accommodating groove moderate, and at the same time ensure that the depth and width of the accommodating groove can accommodate the tightening elastic part, so as to ensure that the tightening elastic part can be embedded in the accommodating groove.

[0058] like Figure 1 as well as Figure 6 As shown, the above-mentioned roller brake with automatic return of brake pads also includes a brake drum 3; and an annular groove 31 is designed on the inner circumferential wall of the brake drum 3.

[0059] It should be noted that in the specific technical solution of the embodiment of the present invention, an annular groove is designed at the inner circumferential wall of the brake drum. The position of the annular groove should correspond to the position of the accommodating groove where the tightening elastic member is located on the multiple brake pads. Since the brake pad is pushed outward by the inner gear ring during the braking process, the tightening elastic member (preferably a tightening tension spring) at the outer circumferential wall of the brake pad is stretched, and at the same time, the outer wall of the brake pad will also achieve friction braking with the inner circumferential wall of the brake drum. In this case, it is possible that the inner circumferential wall of the brake drum will cause greater wear on the tightening tension spring, affecting the service life of the tightening tension spring. However, the annular groove designed in this embodiment can accommodate the protruding tightening tension spring to prevent it from being worn.

[0060] like Figure 6 As shown, the depth dimension of the annular groove 31 is greater than the height dimension of the tightening elastic member 2 .

[0061] It should be noted that in the specific technical solution of the embodiment of the present invention, the annular groove is a groove structure designed on the inner peripheral wall of the brake drum, and its design is also to prevent the inner peripheral wall of the brake drum from wearing the tightening elastic member. Since the tightening elastic member is stretched during the braking process, it is possible that part of the tightening elastic body structure is pulled out of the receiving groove, so that the protruding tightening elastic member can enter the annular groove on the inner peripheral wall of the brake drum to avoid the wear of the tightening elastic member; therefore, the technical requirement is that the depth dimension of the annular groove is greater than the height dimension of the tightening elastic member.

[0062] like Figure 1 as well as Figure 6 As shown, a wear-resistant coating is provided on the inner circumferential wall of the brake drum 3 and the outer arc-shaped circumferential wall of the brake pad 1 .

[0063] It should be noted that in the specific technical scheme of the embodiment of the present invention, the inner circumferential wall of the above-mentioned brake drum and the outer arc-shaped circumferential wall of the brake pad are direct contact braking structures. In order to improve their wear resistance and ensure stable braking performance during long-term use, a wear-resistant coating can be coated on the inner circumferential wall surface of the brake drum and the outer arc-shaped circumferential wall surface of the brake pad.

[0064] The wear-resistant coating is any one of a tungsten carbide alloy coating, a chromium silicon nitride hard wear-resistant coating, and a ceramic wear-resistant coating.

[0065] It should be noted that the above-mentioned wear-resistant coating can be selected from any one of tungsten carbide alloy coating, chromium silicide hard wear-resistant coating, and ceramic wear-resistant coating. The above-mentioned wear-resistant coating can improve the braking performance of the brake pad and meet the use conditions such as heavy load and high-speed friction. The brake pad of the present invention has automatic return roller brake, which has good wear resistance and can greatly improve the life of the brake disc. At the same time, it has good tribological properties, and the surface friction coefficient can meet the use requirements. A second titanium silicide hard wear-resistant coating is provided on the outer surface of the above-mentioned chromium silicide hard wear-resistant coating. In the above manner, the present invention has very high hardness, good wear resistance and good heat resistance.

[0066] The wear resistance of the wear-resistant ceramic coating is many times that of the metal wear-resistant coating, and can be applied to the wear-resistant treatment of the above-mentioned brake pads and brake drum surfaces.

[0067] like Figure 1 as well as Figure 4 As shown, the brake pad 1 is specifically a metal brake pad or an asbestos fiber brake pad.

[0068] It should be noted that in the specific technical solution of the embodiment of the present invention, asbestos fiber has the characteristics of high strength and high temperature resistance, which can enhance the technical performance of the brake pad involved in the embodiment of the present invention. The tensile strength of asbestos fiber can even match that of high-grade steel and can withstand a high temperature of 316°C.

[0069] Embodiment 2

[0070] Correspondingly, the second embodiment of the present invention further provides a vehicle, including a vehicle body and a roller brake with a brake pad automatically returning to its original position arranged on the vehicle body.

[0071] It should be noted that the vehicle provided by the present invention is a roller brake with the above-mentioned brake pad automatic return. Based on the above principle, the vehicle designed by the present invention also has the technical effect of assisting the brake pad to automatically return to its original position.

[0072] like Figure 6 As shown, the brake drum 3 is bolted to the vehicle body. The vehicle further comprises a locking bolt; a plurality of bolt through holes 32 and an axle through hole 33 are arranged on the inner surface of the brake drum; the axle through hole 33 is used to pass the rotating shaft; the locking bolt is used to pass through the bolt through hole 32 on the inner surface of the brake drum and then be bolted to the wheel disc on the vehicle body.

[0073] Preferably, as an implementable solution, the number of bolt through holes and locking bolts are both multiple, and the multiple bolt through holes are spaced and distributed on a circular trajectory centered on the shaft through hole.

[0074] It should be noted that in the specific technical solution of the embodiment of the present invention, the brake drum can be bolted to the vehicle body by using locking bolts passing through the vehicle body. The bolted connection method can ensure a tighter and more reliable connection.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A roller brake with automatic return of brake pads, characterized in that: It includes a plurality of brake pads and a tightening elastic member; the tightening elastic member is annular; Wherein, a receiving groove for receiving the tightening elastic member is further provided on the outer arc-shaped peripheral wall of at least one of the brake pads, and the tightening elastic member is sleeved outside the plurality of the brake pads; The number of the brake pads is at least three, and the outer arc-shaped peripheral wall of the brake pad is provided with the receiving groove, and the receiving groove extends along the outer circumferential direction of the brake pad; The tightening elastic member is a tightening tension spring, and the tightening tension spring is connected end to end to form an annular sleeve; The roller brake with automatic return of the brake pad also includes: The brake drum has an inner circumferential wall, the inner circumferential wall cooperates with the outer arc-shaped circumferential wall of the brake pad for braking and has an annular groove, the position of the annular groove corresponds to the position of the receiving groove on the brake pad, and the depth dimension of the annular groove is greater than the height dimension of the tightening elastic member; The brake pad moves toward the inner circumferential wall and drives the tension spring to expand and deform, and a portion of the tension spring located outside the accommodating groove enters the annular groove.

2. The roller brake with automatic return of brake pads according to claim 1, characterized in that: The surface of the tension spring is coated with anti-rust paint.

3. The roller brake with automatic return of brake pads according to claim 1, characterized in that: Along the depth direction of the accommodating groove, the tightening elastic member is completely located in the accommodating groove.

4. The roller brake with automatic return of brake pads according to claim 1, characterized in that: The inner circumferential wall of the brake drum and the outer arc-shaped circumferential wall of the brake pad are both provided with a wear-resistant coating.

5. The roller brake with automatic return of brake pads according to claim 4, characterized in that: The wear-resistant coating is any one of a tungsten carbide alloy coating, a chromium silicon nitride hard wear-resistant coating, and a ceramic wear-resistant coating.

6. The roller brake with automatic return of brake pads according to claim 1, characterized in that: The brake pad is specifically a metal brake pad or an asbestos fiber brake pad.

7. A vehicle, characterized in that: The invention comprises a vehicle body and a roller brake with automatic return of brake pads as claimed in any one of claims 1 to 6, which is arranged on the vehicle body.

8. The vehicle according to claim 7, characterized in that The brake drum is connected to the vehicle body by bolts.

9. The vehicle according to claim 8, characterized in that It also includes a locking bolt; a plurality of bolt through holes and an axis through hole are arranged on the inner surface of the brake drum; the axis through hole is used to pass the rotating shaft; the locking bolt is used to pass through the bolt through hole on the inner surface of the brake drum and then be connected with the vehicle body bolt.

10. The vehicle according to claim 9, characterized in that The number of the bolt through holes and the locking bolts are both multiple, and the multiple bolt through holes are distributed at intervals on a circular trajectory centered on the shaft through hole.

Images