Convenient dismounting and mounting structure for square motor brake cover

Abstract

The utility model relates to the technical field of motors, in particular to a square motor brake cover convenient disassembly and assembly structure, which comprises a motor front-end casing and a brake cover, the brake cover is locked at the rear end of the motor front-end casing through a plurality of bolts, and connecting pieces are fixed on two opposite sides of the motor front-end casing. Supporting strips extending towards the rear end direction of the motor front end shell are formed on the two connecting pieces, strip-shaped holes extending in the length direction of the supporting strips and penetrating through the supporting strips are formed in the two supporting strips, and a connecting shaft is arranged in the strip-shaped holes of the two supporting strips in a penetrating mode. And the two ends of the connecting shaft penetrate out of the strip-shaped holes, limiting assemblies are arranged at the two ends of the connecting shaft, the limiting assemblies are used for being connected with the supporting strips in an abutting mode, and the connecting shaft is connected with the brake cover. The brake cover is convenient to disassemble and assemble in high-altitude operation, the operation efficiency is improved, and potential safety hazards are eliminated.

Description

Technical Field

[0001] This application relates to the technical field of electric motors, and more specifically, to a convenient disassembly and assembly structure for a square motor brake cover. Background Technology

[0002] In the field of large-scale engineering machinery such as tower cranes, square brake motors are widely used in hoisting mechanisms due to their compact structure and large braking torque. The brake cover (also known as the brake housing) of this type of motor is usually directly locked to the front housing of the motor using a group of circumferentially distributed bolts. This structure exposes significant drawbacks in high-altitude operations: 1. The brake cover is made of steel and is quite heavy. During disassembly at height, operators must hold the cover up the entire time while simultaneously operating multiple bolts, making single-person operation extremely difficult. Installation requires precise alignment of the bolt holes and overcoming gravity to maintain positioning, averaging over 20 minutes; 2. The motor wiring cavity is located inside the brake cover. Routine maintenance requires complete removal of the cover to access the terminals. In the narrow ceiling or platform of the tower crane operator's cab, there is nowhere to temporarily store the disassembled cover, making it prone to interference with cables and steel structures, and sometimes even requiring hoisting to the ground, greatly reducing maintenance efficiency; 3. In the later stages of bolt removal, the cover is only suspended by the remaining bolts. If the operation is unbalanced or the bolts rust and break, metal parts weighing tens of kilograms may fall from a height of tens of meters, posing a significant safety threat to the equipment and personnel below. Utility Model Content

[0003] In order to address the problems in related technologies where brake covers are typically fixed directly to the front housing of the motor by a group of circumferentially distributed bolts, which makes brake maintenance difficult, inefficient, and poses safety hazards, this application provides a square motor brake cover structure that is easy to disassemble and assemble.

[0004] A convenient disassembly and assembly structure for a square motor brake cover includes a motor front housing and a brake cover. The brake cover is locked to the rear end of the motor front housing by multiple bolts. Connecting pieces are fixed on opposite sides of the motor front housing. Each of the two connecting pieces has a support strip extending towards the rear end of the motor front housing. Each of the two support strips has a strip-shaped hole extending along its length and penetrating through itself. A connecting shaft is inserted through the strip-shaped hole of both support strips, and both ends of the connecting shaft extend out of the strip-shaped hole. Limiting components are provided at both ends of the connecting shaft for abutting against the support strip. The connecting shaft is connected to the brake cover.

[0005] By adopting the above technical solution, the brake cover is supported by the support bar and the connecting shaft, avoiding the brake cover being completely lifted and borne by manual labor during the disassembly or assembly process. This reduces the load on the operator, facilitates single-person operation, and allows the brake cover to rotate downward around the connecting shaft after the bolts are removed without completely detaching it from the motor. This solves the problem of temporary storage difficulties for the brake cover, improves work efficiency, and ensures that the brake cover is always suspended on the support bar through the connecting shaft during disassembly and assembly, eliminating the risk of the brake cover falling from a height.

[0006] Preferably, the connecting shaft is connected to the bottom front end of the brake cover.

[0007] By adopting the above technical solution, the connecting shaft is connected to the bottom front end of the brake cover, ensuring that the center of gravity naturally drops during rotation, avoiding the cover from shaking, and at the same time providing maximum maintenance space for the bottom wiring cavity.

[0008] Preferably, the connecting shaft is welded to the brake cover.

[0009] By adopting the above technical solution, the welding method makes the connecting shaft and the brake cover form a rigid whole, which can withstand the mechanical stress during repeated rotation operations and prevent connection failure.

[0010] Preferably, the limiting component includes a washer and a cotter pin. The washer has an opening and is fitted into the end of the connecting shaft through the opening. The end of the connecting shaft has a through hole. The cotter pin is inserted into the through hole and tensioned to fit the through hole. The washer is located between the support bar and the cotter pin, and the distance between the support bar and the cotter pin is greater than the thickness of the washer.

[0011] By adopting the above technical solution, the combination of cotter pin and washer enables tool-free disassembly and assembly of the limiting component, which is convenient. The cotter pin is tensioned to fit the through hole, ensuring that the connecting shaft will not slip out of the slotted hole under vibration. The washer provides a sliding contact surface, and the distance between the support bar and the cotter pin is greater than the thickness of the washer, which allows for axial fine adjustment of the connecting shaft and sliding adjustment along the slotted hole, adapting to installation tolerances and avoiding collision with the brake.

[0012] Preferably, the connecting piece is fixed to the front housing of the motor by bolts.

[0013] By adopting the above technical solution, the connecting piece can be detached and installed by fixing it with bolts, which makes it easier to reduce the modification of the front end housing of the motor and reduce the modification cost.

[0014] Preferably, a handle is provided at the rear end of the brake cover.

[0015] By adopting the above technical solution, the handle provides a point of leverage for the operator, making it easier for the operator to pull the brake cover horizontally and flip it by holding the handle.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The brake cover is supported by a support bar and a connecting shaft, which avoids the brake cover being completely lifted and borne by manual labor during the disassembly or assembly of the brake cover. This reduces the load on the operator and facilitates single-person operation. The brake cover can rotate downward around the connecting shaft after the bolts are removed without completely detaching it from the motor, which solves the problem of temporary storage difficulties for the brake cover and improves work efficiency. In addition, the brake cover is always suspended on the support bar through the connecting shaft during the disassembly and assembly process, eliminating the risk of the brake cover falling from a height.

[0018] 2. The connecting shaft is fixed to the bottom front end of the brake cover to ensure that the center of gravity naturally drops during rotation, preventing the cover from shaking, and at the same time providing maximum maintenance space for the bottom wiring cavity.

[0019] 3. The combination of cotter pins and shims enables tool-free disassembly and assembly of the limiting components, making disassembly and assembly convenient. The cotter pins are tensioned to fit through the through holes, ensuring that the connecting shaft will not slip out of the slotted hole under vibration. The shims provide a sliding contact surface, and the distance between the support bar and the cotter pin is greater than the thickness of the shims, allowing for axial fine adjustment of the connecting shaft's position and sliding adjustment along the slotted hole, adapting to installation tolerances and avoiding collisions with the brake. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first state of a square motor brake cover easy-to-disassemble and assemble structure according to this embodiment.

[0021] Figure 2 This is a schematic diagram of the second state of a square motor brake cover easy-to-disassemble and assemble structure according to this embodiment.

[0022] Figure 3 This is a schematic diagram of the connection structure between the two sets of connecting plates and support bars and the connecting shaft in this embodiment.

[0023] Reference numerals: 1. Motor front housing; 11. Second connecting ear; 2. Brake cover; 21. First connecting ear; 22. Handle; 3. Connecting piece; 4. Support bar; 41. Strip hole; 5. Connecting shaft; 6. Limiting component; 61. Washer; 62. Cotter pin. Detailed Implementation

[0024] The technical solutions of the 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.

[0025] Reference Figure 1 and Figure 2 A convenient assembly and disassembly structure for a square motor brake cover includes a motor front housing 1 and a brake cover 2. Each of the four front corners of the brake cover 2 has a first connecting lug 21, and each of the four rear corners of the motor front housing 1 has a second connecting lug 11. The four first connecting lugs 21 and four second connecting lugs 11 are aligned one-to-one, and each set of first connecting lugs 21 and second connecting lugs 11 is connected by bolts, thus fixing the motor front housing 1 and the brake cover 2 together. Opposite sides of the motor front housing 1 are also fixed with... The connecting piece 3 has two support bars 4 that extend towards the rear end of the front end housing 1 of the motor. Both support bars 4 have strip-shaped holes 41 that extend along their length and penetrate through them. A connecting shaft 5 is inserted through the strip-shaped holes 41 of the two support bars 4. Both ends of the connecting shaft 5 extend through the strip-shaped holes 41 and are provided with limit components 6 at both ends. The limit components 6 are used to abut against the support bars 4 to limit the connecting shaft 5 from disengaging from the support bars 4. The connecting shaft 5 is connected and fixed to the brake cover 2. In the above structure, during the maintenance of the square motor of the tower crane, the brake cover 2 is supported by the support bar 4 and the connecting shaft 5 during disassembly or assembly. This allows the operator to hold the brake cover 2 with one hand and tighten the bolts with the other, making the operation more convenient and improving work efficiency. After the bolts are removed, the brake cover 2 can rotate downward around the connecting shaft 5 without completely detaching from the motor, solving the problem of temporary storage difficulties for the brake cover 2. It is not necessary to hoist the brake cover 2 to the ground, which greatly improves maintenance efficiency. Furthermore, during disassembly and assembly, the brake cover 2 is always suspended on the support bar 4 through the connecting shaft 5, eliminating the risk of the brake cover 2 falling from a height.

[0026] Reference Figure 1 and Figure 2 Furthermore, the connecting piece 3 and the support bar 4 are integrally formed from steel, and the connecting shaft 5 is also made of steel. Steel has high strength and is not easy to break, ensuring the load-bearing capacity of the brake cover 2 and making it safer. The connecting shaft 5 and the brake cover 2 are welded together, forming a rigid whole that can withstand the mechanical stress during repeated rotation and prevent connection failure. The part where the connecting shaft 5 is welded to the brake cover 2 is the bottom front end of the brake cover 2, ensuring that the center of gravity naturally drops during rotation, preventing the cover from shaking, and providing maximum maintenance space for the bottom wiring cavity.

[0027] Reference Figure 1 and Figure 2 Furthermore, the connecting piece 3 is detachably installed by being fixed to the front housing 1 of the motor with bolts, which facilitates the reduction of modifications to the front housing 1 of the motor and reduces modification costs. In addition, the number of bolts is multiple to ensure the connection strength between the connecting piece 3 and the front housing 1 of the motor.

[0028] Reference Figure 1 and Figure 3 Furthermore, the limiting component 6 includes a washer 61 and a cotter pin 62. The washer 61 has an opening and is fitted into the end of the connecting shaft 5 through the opening. The end of the connecting shaft 5 has a through hole. The cotter pin 62 is inserted into the through hole and is tensioned to fit the through hole. The washer 61 is located between the support bar 4 and the cotter pin 62, and the distance between the support bar 4 and the cotter pin 62 is greater than the thickness of the washer 61. The combination of the cotter pin 62 and the washer 61 enables tool-free disassembly and assembly of the limiting component 6, which is convenient. The tensioned fit of the cotter pin 62 into the through hole ensures that the connecting shaft 5 will not slip out of the strip hole 41 under vibration. The washer 61 provides a sliding contact surface, and the distance between the support bar 4 and the cotter pin 62 is greater than the thickness of the washer 61, which allows for axial fine adjustment of the position of the connecting shaft 5 and sliding adjustment of its position along the strip hole 41, adapting to installation tolerances and avoiding collision with the brake.

[0029] Reference Figure 1 Furthermore, a handle 22 is provided at the rear end of the brake cover 2, which provides a point of leverage for the operator. The operator can easily pull the brake cover 2 to move it horizontally and flip it by holding the handle 22.

[0030] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A convenient disassembly and assembly structure for a square motor brake cover, characterized in that: The device includes a front-end housing of a motor and a brake cover. The brake cover is fastened to the rear end of the front-end housing of the motor by multiple bolts. Connecting pieces are fixed on opposite sides of the front-end housing of the motor. Each connecting piece has a support strip extending towards the rear end of the front-end housing of the motor. Each support strip has a strip-shaped hole extending along its length and penetrating through itself. A connecting shaft is inserted through the strip-shaped hole of both support strips, and both ends of the connecting shaft extend out of the strip-shaped hole. Limiting components are provided at both ends of the connecting shaft for abutting against the support strip. The connecting shaft is connected to the brake cover.

2. The easily detachable and assembleable square motor brake cover structure according to claim 1, characterized in that: The connecting shaft is connected to the bottom front end of the brake cover.

3. A convenient disassembly and assembly structure for a square motor brake cover according to any one of claims 1 or 2, characterized in that: The connecting shaft is welded to the brake cover.

4. The easily detachable and assembleable square motor brake cover structure according to claim 1, characterized in that: The limiting component includes a washer and a cotter pin. The washer has an opening and is fitted into the end of the connecting shaft through the opening. The end of the connecting shaft has a through hole. The cotter pin is inserted into the through hole and is tensioned to fit the through hole. The washer is located between the support bar and the cotter pin, and the distance between the support bar and the cotter pin is greater than the thickness of the washer.

5. The easily detachable and assembleable square motor brake cover structure according to claim 1, characterized in that: The connecting piece is fixed to the front housing of the motor by bolts.

6. The easily detachable and assembleable square motor brake cover structure according to claim 1, characterized in that: A handle is provided at the rear end of the brake cover.

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