Normally closed rotating shaft brake

Abstract

The utility model provides a normally-closed rotating shaft brake which comprises a brake body used for braking a rotating shaft, and the brake body comprises a front cover, a rear cover, an isolating ring, two piston pieces and a brake piece. The isolating ring is arranged between the front cover and the rear cover, the front cover and the rear cover are respectively provided with a piston groove, the two piston pieces are respectively arranged in the piston grooves of the front cover and the rear cover, and the front cover and the rear cover are respectively wrapped with the piston pieces and the isolating ring to form a cavity. The cavity can be filled with oil or gas so as to drive the front cover and the rear cover to move in the direction away from the brake pad. And the brake pad is arranged between the front cover and the rear cover and can be connected with the rotating shaft. And by replacing the brake pads with different sizes, the device can adapt to rotating shafts with different diameters, so that the generality and the suitability of the product are enhanced. By changing the thickness of the brake pad, the brake torque can be flexibly adjusted so as to meet the use requirements in different environments.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically to a normally closed rotary shaft brake. Background Technology

[0002] In mechanical transmission systems, rotary shaft brakes are critical safety components, widely used in automated equipment, lifting machinery, machine tools, and other fields. Existing rotary shaft brakes typically employ spring return or hydraulic / pneumatic actuation structures, but these still have some shortcomings in practical applications. For example, some brakes have complex structures, leading to higher manufacturing costs and inconvenient installation and maintenance. Furthermore, the braking torque of traditional brakes is usually fixed, making it difficult to adapt to different operating conditions and limiting their application range. Over long-term use, some brakes may experience reduced braking performance or even safety hazards due to metal fatigue or structural loosening. Therefore, there is an urgent need for a rotary shaft brake that is simple in structure, has a wide range of applications, adjustable braking torque, and can effectively reduce metal fatigue and extend service life to meet the demands of modern industrial equipment for high-performance, high-reliability braking devices. Utility Model Content

[0003] In view of this, the present invention provides a normally closed rotary shaft brake.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A normally closed rotary shaft brake includes a brake for braking a rotary shaft. The brake includes a front cover, a rear cover, an isolation ring, two piston plates, and a brake pad. The front cover, rear cover, isolation ring, two piston plates, and brake pad are all annular structures. The isolation ring is located between the front cover and the rear cover. The front cover and the rear cover are each provided with a piston groove. The two piston plates are respectively located in the piston grooves of the front cover and the rear cover. A cavity is formed between the front cover and the rear cover and the piston plates. The cavity can be filled with oil or gas to drive the front cover and the rear cover to move away from the brake pad. The brake pad is located between the front cover and the rear cover and can be connected to the rotary shaft.

[0006] In a preferred embodiment, the brake pad is located between the front cover and the rear cover, and the front cover and the rear cover can respectively fit the outer edge of the brake pad to brake it. The inner part of the brake pad extends out of the inner hole of the front cover and the rear cover and connects to the rotating shaft.

[0007] In a preferred embodiment, the portion of the brake pad extending from the inner side of the front and rear covers is provided with multiple fixing holes for connecting the rotating shaft. The brake is suitable for rotating shafts of different diameters and can be adapted by replacing brake pads of different sizes.

[0008] In the preferred embodiment, the front cover, rear cover, and isolation ring are connected by bolts. The front cover, rear cover, and isolation ring are each provided with multiple coaxially distributed through holes, through which bolts can pass and fasten the front cover, rear cover, and isolation ring.

[0009] In a preferred embodiment, the brake adjusts the braking torque by adjusting the thickness of the brake pads.

[0010] In a preferred embodiment, the isolation ring has oil inlets on its side that connect the upper and lower sides to its interior.

[0011] In a preferred embodiment, the front cover and the rear cover are respectively provided with an oil injection channel that connects to the oil injection port, and the oil injection channel connects to the cavity.

[0012] As can be seen from the above technical solution, compared with the prior art, the present invention has the following beneficial technical effects:

[0013] The brake employs a ring-shaped structure design, making the overall brake structure more stable, improving durability, and enhancing resistance to mechanical shock. By replacing brake pads of different sizes, it can adapt to rotating shafts of different diameters, enhancing the product's versatility and adaptability. By changing the thickness of the brake pads, the braking torque can be flexibly adjusted to meet the needs of use in different environments. By adjusting the surface roughness of the brake pads, friction characteristics can be optimized to achieve higher or lower braking torques, suitable for various working conditions. Under normal conditions, the front and rear covers clamp the brake pads, achieving static braking and preventing radial rotation, displacement, or fretting of the rotating shaft. In the event of oil or air cutoff, the brake is in a normally closed state, effectively preventing the rotating shaft from loosening, falling, or accidentally rotating, improving equipment safety. The front and rear covers are separated by hydraulic or pneumatic pressure, achieving rapid release, allowing the brake to be quickly released when needed, improving operational flexibility. The isolation ring structure design ensures that oil or gas is evenly distributed into the cavities inside the front and rear covers, ensuring stable brake operation. The brake employs a bolt-locking design, enhancing resistance to metal fatigue, preventing bolt loosening due to prolonged use, and improving structural stability and service life. The brake's overall structure is simple, with highly interchangeable components, facilitating installation, disassembly, and maintenance, thus reducing operating costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1This is a cross-sectional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 3 This is an exploded structural diagram of the present invention.

[0018] Figure 4 for Figure 1 A partially enlarged structural diagram.

[0019] Reference numerals: 100, Brake; 110, Front cover; 120, Rear cover; 130, Isolation ring; 140, Piston pad; 150, Brake pad; 101, Piston groove; 102, Cavity; 151, Fixing hole; 103, Through hole; 131, Oil inlet; 104, Oil inlet channel. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0021] In the description of this application, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] A normally closed rotary shaft brake, please refer to Figure 1-3The system includes a brake 100 for braking a rotating shaft (the rotating shaft is not shown in the figure). The brake 100 includes a front cover 110, a rear cover 120, an isolation ring 130, two piston plates 140, and a brake pad 150. The front cover 110, rear cover 120, isolation ring 130, two piston plates 140, and brake pad 150 are all annular structures, making the brake 100 as a whole annular structure after the components are assembled, thereby improving structural stability and enhancing durability. The two piston plates 140 are respectively disposed in the piston grooves 101 of the front cover 110 and the rear cover 120. A cavity 102 is formed between the front cover 110, the rear cover 120, and the piston plates 140. The cavity 120 can be filled with oil or gas to drive the front cover 110 and the rear cover 120 to move away from the brake pad 150. The brake pad 150 is disposed between the front cover 110 and the rear cover 120 and can be connected to the rotating shaft. Piston plate 150 is embedded in piston groove 101 to be installed on front cover 110 and rear cover 120. A sealing ring is also fitted in piston groove 101 to wrap around both sides of piston plate 140. The sealing ring is not shown in the figure. One side of piston plate 140, in conjunction with the sealing ring, can close piston groove 101 to prevent oil or air leakage. The cavity 102 is part of piston groove 101. A stepped structure is formed on the side of piston plate 140 near the bottom of piston groove 101. The cavity 102 is formed between the stepped structure and piston groove 101. After piston plate 140 and sealing ring close the opening of piston groove 101, the space between piston plate 140 and piston groove 101 forms cavity 102.

[0024] Furthermore, the brake pad 150 is located between the front cover 110 and the rear cover 120. The front cover 110 and the rear cover 120 can respectively fit against the outer edge of the brake pad 150 to brake it. The inner part of the brake pad 150 extends out of the inner holes of the front cover 110 and the rear cover 120 and connects to the rotating shaft. The portion of the brake pad 150 extending out of the inner holes of the front cover 110 and the rear cover 120 is provided with multiple fixing holes 151 for connecting the rotating shaft. The brake 100 is suitable for rotating shafts of different diameters, and can be adapted by replacing the brake pads 150 with different sizes. Different brake pads 150 generally refer to differences in their outer diameter, inner diameter, and thickness. The fixing holes 151 of the brake pad 150 can also be changed in size to accommodate different rotating shafts. When the brake 100 is engaged, the front cover 110 and the rear cover 120 simultaneously fit against the outer edge of the brake pad 150 to clamp the brake pad 150 and brake the rotating shaft.

[0025] Furthermore, the front cover 110, rear cover 120, and isolation ring 130 are connected by bolts. Each of the front cover 110, rear cover 120, and isolation ring 130 has multiple coaxially distributed through holes 103. Bolts can pass through the through holes 103 to achieve a tight connection between the front cover 110, rear cover 120, and isolation ring. The through holes 130 are located on the outer side of the front cover 110, rear cover 120, and isolation ring 130 to achieve a stable connection without affecting the position of the cavity 102. The front cover 110 and rear cover 120 are locked by bolts in a locking manner, achieving the goal of bolt loosening to prevent metal fatigue. The bolts are not shown in the figure. The braking torque of the brake 100 is adjustable, specifically achieved by changing the thickness of the brake pad 150 (i.e., adjusting the interference fit of the front cover 110, rear cover 120, and brake pad 150).

[0026] Furthermore, the isolation ring 130 has an oil inlet 131 on its side that connects to the upper and lower sides of its interior. The oil inlet 131 is a through hole that extends horizontally inward from the side of the isolation ring 130. The end of the through hole extends to the upper and lower ends of the isolation ring 130. The front cover 110 and the rear cover 120 are respectively provided with oil inlet channels 104 that connect to the oil inlet 131. The oil inlet channel 104 is a channel structure that connects to the cavity 102. The channel has a vertically downward / upward extending part that connects to the branches of the oil inlet 131 on the upper and lower sides of the isolation ring 130. This allows the oil or gas injected from the oil inlet 131 to be diverted to the front cover 110 and the rear cover 120, and then enter the cavity 102.

[0027] Furthermore, the brake 100 has two main functions: First, when the rotating shaft is stationary, the clamping of the front cover 110, rear cover 120, and brake pad 150 ensures that the rotating shaft does not rotate radially, displace, or fret. Second, the brake 100 provides safety protection by simultaneously clamping the brake pad with the front cover 110 and rear cover 120 when the oil or air pressure is cut off or the power is cut off, preventing the rotating shaft from rotating, falling, or loosening. The brake pad 150 is locked by bolts tightened by the front cover 110 and rear cover 120 with a fixed torque. At this time, the front cover 110 and rear cover 120 clamp the brake pad 150 to achieve the purpose of static braking with the shaft normally closed. When oil is introduced into the oil inlet 131 on the isolation ring 130, the oil enters the cavity 102 between the front cover 110, the rear cover 120, and the piston plate 140 through the diversion structure. Under oil pressure, the oil expands, thereby widening the gap between the front cover 110 and the rear cover 120, creating a gap between the brake 100 and the brake pad 150, allowing the brake pad 150 to rotate normally with the rotating shaft. After the oil supply is stopped, without force on the brake 100, the front cover 110 and the rear cover 120 return to their original positions and clamp the brake pad 150, thus braking the rotating shaft. This invention allows for the use of replaceable brake pads 150 of different sizes (within a certain size range) to accommodate rotating shafts of different sizes. Furthermore, the braking torque is adjustable; this is achieved by adjusting the thickness of the brake pads, which can increase or decrease the maximum braking torque of the brake 100 to meet the requirements of use in different environments. Furthermore, compared to other traditional brakes, this invention can achieve extremely high braking torque by changing the thickness and surface roughness of the brake pads 150, making it suitable for more extreme environments and usage requirements. Moreover, this invention uses a bolt-locking mechanism to prevent bolt loosening and resist metal fatigue, thereby improving service life. In addition, the brake 100 has a simple and effective structure, high reliability and interchangeability, meeting the needs of different customer groups.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A normally closed rotary shaft brake, comprising a brake (100) for braking a rotary shaft, characterized in that: The brake (100) includes a front cover (110), a rear cover (120), an isolation ring (130), two piston plates (140), and a brake pad (150); the front cover (110), rear cover (120), isolation ring (130), two piston plates (140), and brake pad (150) are all annular structures; the isolation ring (130) is located between the front cover (110) and the rear cover (120), and the front cover (110) and the rear cover (120) are respectively provided with piston grooves (101). The two piston plates (140) are respectively disposed in the piston grooves (101) of the front cover (110) and the rear cover (120). A cavity (102) is formed between the front cover (110) and the rear cover (120) and the piston plate (140). The cavity (102) can be filled with oil or gas to drive the front cover (110) and the rear cover (120) to move away from the brake pad (150). The brake pad (150) is disposed between the front cover (110) and the rear cover (120) and can be connected to a rotating shaft.

2. The normally closed rotary shaft brake according to claim 1, characterized in that: The brake pad (150) is located between the front cover (110) and the rear cover (120). The front cover (110) and the rear cover (120) can respectively fit the outer edge of the brake pad (150) to brake it. The inner part of the brake pad (150) extends out of the inner hole of the front cover (110) and the rear cover (120) and is connected to the rotating shaft.

3. A normally closed rotary shaft brake according to claim 2, characterized in that: The portion of the brake pad (150) extending from the inner side of the front cover (110) and the inner hole of the rear cover (120) is provided with a plurality of fixing holes (151) for connecting the rotating shaft. The brake (100) is suitable for rotating shafts of different diameters and can be adapted by replacing the brake pad (150) of different sizes.

4. A normally closed rotary shaft brake according to claim 1, characterized in that: The front cover (110), rear cover (120), and isolation ring (130) are connected by bolts. The front cover (110), rear cover (120), and isolation ring (130) are respectively provided with multiple coaxially distributed through holes (103). The bolts can pass through the through holes (103) and achieve a tight connection between the front cover (110), rear cover (120), and isolation ring (130).

5. A normally closed rotary shaft brake according to claim 4, characterized in that: The brake (100) adjusts the braking torque by adjusting the thickness of the brake pads (150).

6. A normally closed rotary shaft brake according to claim 1, characterized in that: The isolation ring (130) has oil inlets (131) on its side that connect the upper and lower sides inside.

7. A normally closed rotary shaft brake according to claim 1, characterized in that: The front cover (110) and the rear cover (120) are respectively provided with an oil injection channel (104) that connects to the oil injection port (131), and the oil injection channel (104) connects to the cavity (102).

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