A reversible auxiliary braking device

Abstract

This application relates to a reversible auxiliary braking device, comprising a motor, a housing, a transmission assembly, and a worm gear mechanism. The motor has an output wheel at its output end, and the input end of the transmission assembly is drive-connected to the output wheel. The worm gear mechanism includes a meshing worm wheel and a worm. The worm is a multi-start worm, rotatably mounted on the housing, and a transmission wheel is fixedly mounted on its input end. The transmission wheel is coaxially and fixedly connected to the worm. The output end of the transmission assembly is drive-connected to the transmission wheel. The housing has an output shaft, which is rotatably connected to the housing, and the worm wheel is fixedly mounted on the output shaft. This application provides smooth and effective auxiliary braking while achieving reversible transmission, and protects the motor from damage caused by reverse impacts.

Description

Technical Field

[0001] This application relates to the field of brake motor technology, and in particular to a reversible auxiliary braking device. Background Technology

[0002] In the field of electric motor drives, especially in applications that require reversing and auxiliary braking, such as electric vehicles, hoisting equipment, and industrial machinery, situations often arise where the transmission mechanism reverses or requires auxiliary braking.

[0003] Most common motor drive structures currently employ a clutch protection mechanism or a worm gear structure at the beginning of the transmission chain. The former will disengage the motor from the transmission mechanism when the transmission mechanism jams or reverses, protecting the motor but failing to provide a continuous braking effect; the latter, although enabling bidirectional transmission, has a smaller reverse driving force, limited braking effect, and is prone to damage to the motor and transmission system when subjected to large reverse impacts.

[0004] The aforementioned technologies have drawbacks, such as the motor failing to operate or being easily damaged by impact during reverse braking, resulting in unsatisfactory braking performance. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides a reversible auxiliary braking device that can provide smooth and effective auxiliary braking while realizing reversible transmission, and protect the motor from damage caused by reverse impact.

[0006] This application is achieved through the following technical solution: A reversible auxiliary braking device includes a motor, a housing, a transmission assembly, and a worm gear mechanism. The motor has an output wheel at its output end, and the input end of the transmission assembly is drivenly connected to the output wheel of the motor. The worm gear mechanism includes a meshing worm wheel and a worm. The worm is a multi-start worm, rotatably mounted on the housing, and a transmission wheel is fixedly mounted on the input end of the worm. The transmission wheel is coaxially and fixedly connected to the worm. The output end of the transmission assembly is drivenly connected to the transmission wheel. The housing has an output shaft, which is rotatably connected to the housing, and the worm wheel is fixedly mounted on the output shaft.

[0007] By adopting the above technical solution, a multi-start worm gear is placed at the end of the transmission chain, and power is transmitted through a transmission assembly. During forward drive, the motor power is transmitted to the worm gear via the transmission assembly, driving the worm wheel and output shaft. During reverse drive, the external load drives the worm gear to rotate in the opposite direction via the output shaft and worm wheel, and power is transmitted to the motor via the transmission assembly. At this time, the motor operates as a generator to produce braking force. This design, through the cooperation of the multi-start worm gear and the transmission assembly, achieves effective forward transmission and provides smooth auxiliary braking during reverse drive, while protecting the motor from impact damage.

[0008] Optionally, the transmission component is a gear transmission mechanism; both the transmission wheel and the output wheel are gear structures; the output end of the transmission component is connected to the transmission wheel by gear meshing.

[0009] By adopting the above technical solutions, gear transmission has the advantages of high transmission efficiency, compact structure, and reliable operation, and can effectively transmit power and achieve the required transmission ratio.

[0010] Optionally, the gear transmission mechanism includes an intermediate transmission shaft on which a large gear and a small gear are fixedly arranged coaxially.

[0011] By adopting the above technical solution, a compact transmission layout can be achieved using a single-shaft double-gear structure, enabling a reasonable distribution of the transmission ratio within a limited space.

[0012] Optionally, the intermediate drive shaft, large gear, and small gear are integrally formed and made of soft metal material.

[0013] By adopting the above technical solutions, the one-piece molding structure ensures the strength and precision of the gears, reduces assembly processes, and improves transmission stability; the use of soft metal materials helps to reduce noise and vibration.

[0014] Optionally, the large gear meshes with the output gear of the motor; the small gear meshes with the transmission wheel.

[0015] By adopting the above technical solution, a larger transmission ratio can be achieved using a two-stage gear transmission, which increases the output torque during forward drive and increases the motor speed during reverse drive, thereby enhancing the braking effect.

[0016] Optionally, the transmission component is a belt drive mechanism; both the transmission wheel and the output wheel are pulley structures; the output end of the transmission component is connected to the transmission wheel via belt drive.

[0017] By adopting the above technical solutions, belt drives have advantages such as buffering and vibration absorption, and low noise, and can provide better working performance under certain specific working conditions.

[0018] Optionally, the belt drive mechanism is a flexible drive belt connected between the motor output wheel and the drive wheel.

[0019] By adopting the above technical solutions, flexible transmission belts can effectively buffer impact loads and provide smoother speed changes during starting and braking.

[0020] Optionally, the housing, along the length of the motor output shaft, sequentially comprises a first housing and a second housing from the end closest to the motor to the end furthest from the motor; the worm gear mechanism and the output shaft are housed within the first housing; and the transmission assembly and the transmission wheel are housed within the second housing. By adopting the above technical solution, the split housing design facilitates the processing and assembly of each component, and also benefits the selection and management of lubricants.

[0021] Optionally, the first housing and the second housing are detachably fixed together by bolts.

[0022] By adopting the above technical solution, the detachable connection facilitates equipment maintenance and repair, and improves ease of use.

[0023] Optionally, the multi-start worm gear is a three-start worm gear.

[0024] By adopting the above technical solution, the three-headed worm gear can ensure forward transmission efficiency while having appropriate reverse transmission efficiency, effectively transmitting power and generating sufficient braking force in the reverse direction.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By placing a multi-head worm gear at the end of the transmission chain and combining it with a specific design of the transmission components, this application enables smooth braking through the magnetic resistance generated by the motor during reverse drive, thus avoiding the disengagement or damage of the motor in traditional structures. 2. This application adopts a split-shell design, which facilitates manufacturing, assembly, and maintenance; 3. This application, by employing a multi-start worm gear and a transmission component with a specific transmission ratio, ensures both forward transmission efficiency and provides effective auxiliary braking in the reverse direction. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a reversible auxiliary braking device as described in Embodiment 1; Figure 2 This is a schematic diagram of the internal structure of a reversible auxiliary braking device as described in Embodiment 1; Figure 3 This is a cross-sectional view of the transmission component described in Embodiment 1, which is a gear transmission mechanism; Figure 4This is a schematic diagram of the transmission component described in Embodiment 2, which is a pulley transmission mechanism.

[0027] In the diagram: 1. Motor; 11. Output wheel; 2. Housing; 21. First housing; 22. Second housing; 3. Transmission assembly; 31. Gear transmission mechanism; 311. Intermediate transmission shaft; 312. Large gear; 313. Small gear; 32. Belt transmission mechanism; 321. Flexible transmission belt; 4. Output shaft; 5. Transmission wheel; 6. Worm gear mechanism; 61. Worm; 62. Worm wheel. Detailed Implementation

[0028] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Example 1 refer to Figure 1 and Figure 2 This application provides a reversible auxiliary braking device, including a motor 1, a housing 2, a transmission assembly 3, and a worm gear mechanism 6. The output end of the motor 1 is provided with an output wheel 11, and the input end of the transmission assembly 3 is connected to the output wheel 11 of the motor 1. The worm gear mechanism 6 includes a worm wheel 62 and a worm 61 that mesh with each other. The worm 61 is a multi-start worm 61, which is rotatably mounted on the housing 2, and the input end of the worm 61 is fixedly provided with a transmission wheel 5. The transmission wheel 5 is coaxially fixedly connected to the worm 61, and the output end of the transmission assembly 3 is connected to the transmission wheel 5. The housing 2 is provided with an output shaft 4, which is rotatably connected to the housing 2, and the worm wheel 62 is fixedly mounted on the output shaft 4.

[0030] For details, please refer to Figure 1 The housing 2 serves to protect and support the various components. Along the length of the output shaft 4 of the motor 1, the housing 2 comprises a first housing 21 and a second housing 22, extending from the end closest to the motor 1 to the end furthest away. The first housing 21 and the second housing 22 are detachably connected by bolts, facilitating installation and maintenance. The first housing 21 houses the worm gear mechanism 6 and the output shaft 4, while the second housing 22 houses the transmission assembly 3 and the transmission wheel 5. The housing 2 is generally made of cast iron or aluminum alloy, providing good strength and heat dissipation.

[0031] refer to Figure 2The output end of motor 1 is equipped with an output wheel 11. Motor 1, as a power source, is typically a three-phase asynchronous motor, which has advantages such as simple structure, reliable operation, and convenient maintenance. The output wheel 11 can be a gear structure made of steel, possessing high strength and wear resistance. Of course, the output wheel 11 can also be made of other materials, such as cast iron. The output wheel 11 is connected to the output shaft 4 of motor 1 via a key, ensuring stable power transmission.

[0032] refer to Figure 2 The worm gear mechanism 6 includes a meshing worm wheel 62 and a worm 61. The worm 61 is a multi-start worm 61, specifically a three-start worm 61. Compared to a single-start worm 61, a multi-start worm 61 can transmit greater power at the same rotational speed and allows for rapid reversal. The worm 61 is rotatably mounted on the housing 2, and its input end is equipped with a transmission wheel 5, which is coaxially and fixedly connected to the worm 61. The transmission wheel 5 is a gear structure and is connected to the worm 61 via a key to ensure synchronous power transmission. The worm wheel 62 is fixed to the output shaft 4, and a key connection is also used between the worm wheel 62 and the output shaft 4. The materials for the worm wheel 62 and the worm 61 are typically a combination of bronze and alloy steel. This material combination has good friction reduction and wear resistance properties, ensuring the long-term stable operation of the worm gear mechanism 6.

[0033] refer to Figure 2 and Figure 3 In this embodiment, the transmission component 3 is a gear transmission mechanism 31, which serves to transmit power and change the rotational speed. The gear transmission mechanism 31 includes an intermediate transmission shaft 311, on which a large gear 312 and a small gear 313 are fixedly mounted coaxially. The intermediate transmission shaft 311 is generally cylindrical and can be made of alloy steel, a material with good strength and toughness. The large gear 312 and small gear 313 are integrally formed with the intermediate transmission shaft 311 and are made of a soft metal material such as copper alloy. Soft metal materials can reduce noise and wear during gear transmission. The large gear 312 meshes with the output wheel 11 of the motor 1, and the small gear 313 meshes with the transmission wheel 5. The tooth profile of the large gear 312 and small gear 313 is usually an involute tooth profile, which provides smooth transmission and high efficiency. The module and number of teeth of the large gear 312 and small gear 313 are designed according to the actual transmission ratio requirements.

[0034] The implementation principle of this embodiment is as follows: After the motor 1 starts, the output wheel 11 at its output end transmits power to the large gear 312 of the transmission assembly 3. The large gear 312 drives the intermediate transmission shaft 311 to rotate, and the small gear 313 on the intermediate transmission shaft 311 then transmits power to the transmission wheel 5. The transmission wheel 5 drives the multi-start worm gear 61 to rotate, and the multi-start worm gear 61 meshes with the worm wheel 62, thereby driving the output shaft 4 to rotate. Due to the use of the multi-start worm gear 61, the device can achieve rapid reversal and has better flexibility and adaptability under different working scenarios and load changes. In reverse transmission, due to the large transmission ratio formed in the device, coupled with the magnetic resistance during the rotation of the motor 1, a large resistance is formed, thereby achieving a braking effect. Compared with traditional braking devices, this device improves the braking response speed and reversing function, reduces the complexity of mechanical structures and the coordination of multiple parts, reduces the probability of failure, and improves the reliability and working efficiency of the equipment.

[0035] Example 2 Reference Figure 1 and Figure 4 The difference between this embodiment and Embodiment 1 is that the transmission component 3 is a belt drive mechanism 32, and both the transmission wheel 5 and the output wheel 11 are pulley structures. The output end of the transmission component 3 is connected to the transmission wheel 5 via belt drive. The belt drive mechanism 32 is a flexible transmission belt 321 connected between the output wheel 11 of the motor 1 and the transmission wheel 5. The flexible transmission belt 321 is usually made of rubber, which has good elasticity and flexibility, can buffer and dampen shocks, protect important components of the transmission system, and reduce noise during transmission. Compared with gear drive, this belt drive method has advantages such as convenient installation and lower cost, and is more suitable for some working scenarios with high noise requirements.

[0036] The implementation principle of this embodiment is as follows: After the motor 1 starts, its output wheel 11 transmits power to the transmission wheel 5 through the flexible transmission belt 321. The transmission wheel 5 drives the multi-head worm gear 61 to rotate, and the multi-head worm gear 61 meshes with the worm wheel 62, driving the output shaft 4 to rotate. The buffering and shock absorption effect of the belt drive mechanism 32 can reduce the vibration and noise of the equipment and improve the comfort of the working environment. At the same time, the installation and maintenance of the belt drive are relatively simple, reducing the operating cost of the equipment. Compared with traditional braking devices, this device, while satisfying the functions of braking and reversing, also has better shock absorption and noise reduction effects, and is suitable for more working scenarios.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A reversible auxiliary braking device, characterized in that, The device includes a motor (1), a housing (2), a transmission assembly (3), and a worm gear mechanism (6). The output end of the motor (1) is provided with an output wheel (11), and the input end of the transmission assembly (3) is connected to the output wheel (11) of the motor (1). The worm gear mechanism (6) includes a worm wheel (62) and a worm (61) that mesh with each other. The worm (61) is a multi-headed worm (61) and is rotatably mounted on the housing (2). The input end of the worm (61) is fixedly provided with a transmission wheel (5). The transmission wheel (5) is coaxially fixedly connected to the worm (61). The output end of the transmission assembly (3) is connected to the transmission wheel (5). The housing (2) is provided with an output shaft (4), which is rotatably connected to the housing (2). The worm wheel (62) is fixedly mounted on the output shaft (4).

2. The reversible auxiliary braking device according to claim 1, characterized in that, The transmission component (3) is a gear transmission mechanism (31); the transmission wheel (5) and the output wheel (11) are both gear structures; the output end of the transmission component (3) is connected to the transmission wheel (5) by gear meshing.

3. The reversible auxiliary braking device according to claim 2, characterized in that, The gear transmission mechanism (31) includes an intermediate transmission shaft (311), on which a large gear (312) and a small gear (313) are fixedly arranged coaxially.

4. The reversible auxiliary braking device according to claim 3, characterized in that, The intermediate drive shaft (311), large gear (312) and small gear (313) are integrally formed and made of soft metal material.

5. A reversible auxiliary braking device according to claim 4, characterized in that, The large gear (312) meshes with the output wheel (11) of the motor (1); the small gear (313) meshes with the transmission wheel (5).

6. The reversible auxiliary braking device according to claim 1, characterized in that, The transmission component (3) is a belt drive mechanism (32); the transmission wheel (5) and the output wheel (11) are both pulley structures; the output end of the transmission component (3) is connected to the transmission wheel (5) by belt drive.

7. A reversible auxiliary braking device according to claim 6, characterized in that, The belt drive mechanism (32) is a flexible transmission belt (321) connected between the output wheel (11) of the motor (1) and the transmission wheel (5).

8. The reversible auxiliary braking device according to claim 1, characterized in that, The housing (2) includes a first housing (21) and a second housing (22) in sequence along the length direction of the output shaft (4) of the motor (1) from the end closer to the motor (1) to the end farther away from the motor (1); the worm gear mechanism (6) and the output shaft (4) are housed in the first housing (21); the transmission assembly (3) and the transmission wheel (5) are housed in the second housing (22).

9. A reversible auxiliary braking device according to claim 8, characterized in that, The first housing (21) and the second housing (22) are detachably fixed together by bolts.

10. A reversible auxiliary braking device according to claim 1, characterized in that, The multi-head worm gear (61) is a three-head worm gear (61).

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