Tool for drilling positioning pin holes in bearing and underframe

Abstract

The utility model discloses a tool for drilling positioning pin holes in a bearing and a bottom frame, which comprises a magnetic drill used for drilling positioning pins in the bottom frame and the bearing of a motor, an adsorption cushion block and a fixing tool, the adsorption cushion block is arranged on the motor underframe and located on the side portion of a bearing, a magnetic suction cup of the magnetic drill is adsorbed to the upper surface of the adsorption cushion block, so that a drill bit is right opposite to the center position where a positioning pin is punched, at least one limiting window is formed in the side of the adsorption cushion block, and the fixing tool is connected to a bottom frame of the limiting window in a pressed mode. And the adsorption cushion block is fixed on the motor chassis. The utility model provides a tool for drilling positioning pin holes in a bearing and a bottom frame, which can conveniently and efficiently drill the positioning pin holes in the bearing and the bottom frame.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly, specifically to a tooling for drilling positioning pin holes between bearings and base frames. Background Technology

[0002] For a large motor where the rotor and stator are installed, the rotor 1 is supported by a pedestal bearing, and the bearing 4 and stator 2 rest on the base frame 3, the motor structure is as follows: Figure 1 As shown. After the final assembly test of this type of motor, there is a technical requirement that a locating pin be installed between the bearing 4 and the base frame 3.

[0003] Previously, the locating pin holes for bearings and base frames of this type of product were drilled using a radial drilling machine. When the motor was shipped as a whole (i.e., stator, rotor, bearings, and base frame assembled as one unit), the entire motor had to be lifted to the radial drilling machine. For larger motors with heavier tonnage or larger size, due to space constraints at the radial drilling machine, the motor had to be disassembled—that is, the bearings—and the stator and rotor lifted out before the locating pin drilling could be performed. After the locating pins were drilled, the disassembled motor components were reassembled. This additional step of drilling locating pin holes was time-consuming and labor-intensive, leading to complaints from operators and increased pressure on technicians. Furthermore, the repeated lifting and installation of the stator and rotor also increased the process risks.

[0004] One solution to the above problems is to develop a magnetic drill to replace the radial drilling machine for drilling locating pin holes. However, this method encounters situations where the center of the magnetic drill bit and the bottom hole of the locating pin are not aligned, requiring adjustment. However, due to the size of the magnetic drill chuck, in confined spaces, even with the chuck tightly against the bearing, it is difficult to adjust the drill bit to the center line. There is an urgent need to find a method to solve the problem of not being able to perform the drilling of bearing and base locating pin holes due to space constraints when using a magnetic drill. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tooling solution for drilling positioning pin holes between bearings and base frames, enabling reliable and efficient assembly of motors.

[0006] One technical solution to achieve the above objective is: a tooling for drilling positioning pin holes between bearings and base frames, including a magnetic drill for drilling positioning pin holes in motor base frames and bearings, characterized in that: it also includes an adsorption pad and a fixing tooling.

[0007] The adsorption pad is set on the motor base frame, located on the side of the bearing. The magnetic suction cup of the magnetic drill is adsorbed onto the upper surface of the adsorption pad, so that the drill bit is directly facing the center position for drilling the positioning pin. At least one limiting window is opened on the side of the adsorption pad. The fixing fixture is pressed onto the bottom frame of the limiting window, so that the adsorption pad is fixed on the motor base frame.

[0008] Furthermore, the fixing fixture includes a support pad, a U-shaped pressure plate, a fixture screw, and a test platform;

[0009] The motor base frame is mounted on the test platform;

[0010] The support pad is placed on the test platform and supports the U-shaped pressure plate. The U-shaped pressure plate is pressed against the bottom frame of the limiting window, so that the adsorption pad is fixed on the motor base. The tooling screw passes through the middle of the U-shaped pressure plate, and the bottom of the tooling screw is connected to the test platform. The tooling screw fixes the U-shaped pressure plate and generates downward pressure through the pressure plate.

[0011] Furthermore, the test platform is provided with a T-slot, and a T-nut is provided in the T-slot. The bottom of the tooling screw is connected to the T-nut.

[0012] Furthermore, the height of the support pad is equal to the height of the motor base frame plus the height of the bottom frame of the limit window, so that the U-shaped pressure plate is set horizontally, and the distance between the support pad and the motor base frame matches the length of the U-shaped pressure plate.

[0013] This invention provides a tooling solution for drilling locating pin holes between bearings and base frames. Through the arrangement of support blocks, suction blocks, and U-shaped pressure plates, the magnetic drill suction cup base is fixed, and the drill bit can be adjusted to be aligned with the bottom hole of the locating pin hole, thus achieving the goal of drilling locating pin holes between the bearing and the base frame. This invention has a simple structure, is easy to implement, and avoids the need for disassembling and hoisting the motor, reducing production risks and improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the motor assembly in an embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the tooling for drilling positioning pin holes between bearings and base frames according to this utility model.

[0016] Figure 3 This is a schematic diagram of the T-shaped nut in this utility model. Detailed Implementation

[0017] To better understand the technical solution of this utility model, a detailed description is provided below through specific embodiments:

[0018] Please see Figure 2 This utility model provides a tooling solution for drilling positioning pin holes between bearings and base frames, used for... Figure 1 The motor shown is fitted with locating pin holes. This includes a magnetic drill 5, an adsorption pad 6, and a fixing fixture for drilling locating pin holes in the motor base and bearings. The fixing fixture includes a support pad 7, a U-shaped pressure plate 8, a fixture screw 9, a test platform 10, and a T-nut 11.

[0019] The experimental platform 10 has T-slots on its surface array. The base frame 3 is mounted on the experimental platform 10.

[0020] The adsorption pad 6 is mounted on the motor base and abuts against the side of the bearing. The magnetic chuck of the magnetic drill 5 is adsorbed onto the upper surface of the adsorption pad 6, and can extend slightly forward from the adsorption pad 6 so that the drill bit is directly facing the center position for drilling the positioning pin. At least one limiting window 61 is provided on the side of the adsorption pad 6. The function of the limiting window is to reserve space for the U-shaped pressure plate 8. At least one limiting window 61 must face a T-slot to facilitate the subsequent setting of the tooling screw 9.

[0021] After the adsorption pad 6 is set, the support pad 7 is placed on the experimental platform 10, its position corresponding to that of the adsorption pad 6, and its position is adjusted according to the length of the U-shaped pressure plate 8. The height of the support pad 7 is equal to the height of the motor base 3 plus the height of the bottom frame of the limiting window 61, so that the U-shaped pressure plate 8 can be set horizontally. After the support pad 7 is set, the U-shaped pressure plate 8 is set so that its closed end is pressed against the bottom frame of the limiting window 61, and its open end is supported by the support pad 7. Finally, the tooling screw 9 is passed through the middle of the U-shaped pressure plate 8. At the bottom of the corresponding position of the T-slot, a... Figure 3 The T-nut 11 shown connects the bottom of the tooling screw to the test platform. The tooling screw fixes the U-shaped pressure plate and generates downward pressure through the pressure plate, thus fixing the entire tooling.

[0022] This invention provides a solution to the problem of not being able to directly drill positioning pin holes using a magnetic drill due to space constraints between the bearing and the base frame. Specifically, it utilizes the T-slot on the test bench plate and fixes the magnetic drill adsorption pads with a U-shaped pressure plate to complete the assembly, thus solving the existing problem and ensuring the drilling quality of the positioning pin holes.

[0023] After the motor test is completed, the positioning pin holes can be drilled directly on the test platform. Compared with the previous method of disassembling the motor (i.e., removing the bearings, stator, rotor and other parts) and hoisting it to the radial drilling machine to drill the positioning pin holes, this shortens the production cycle, reduces the risks that may occur during disassembly and hoisting, and also reduces the labor costs of disassembly or reassembly.

[0024] This invention provides a practical and feasible process for drilling locating pin holes in the bearings and base frame of this type of motor structure.

[0025] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any changes or modifications to the above embodiments within the scope of the essential spirit of the present utility model will fall within the scope of the claims of the present utility model.

Claims

1. A tooling for drilling locating pin holes between bearings and a base frame, comprising a magnetic drill for drilling locating pin holes in the motor base frame and bearings, characterized in that: It also includes adsorption pads and fixing fixtures; The adsorption pad is set on the motor base frame, located on the side of the bearing. The magnetic suction cup of the magnetic drill is adsorbed onto the upper surface of the adsorption pad, so that the drill bit is directly facing the center position for drilling the positioning pin. At least one limiting window is opened on the side of the adsorption pad. The fixing fixture is pressed onto the bottom frame of the limiting window, so that the adsorption pad is fixed on the motor base frame.

2. The tooling for drilling positioning pin holes between bearings and base frames according to claim 1, characterized in that, The fixed fixture includes a support pad, a U-shaped pressure plate, a fixture screw, and a test platform; The motor base frame is set on the test platform; the support pad is set on the test platform and supports the U-shaped pressure plate. The U-shaped pressure plate is pressed against the bottom frame of the limiting window, so that the adsorption pad is fixed on the motor base frame. The tooling screw passes through the middle of the U-shaped pressure plate, and the bottom of the tooling screw is connected to the test platform. The tooling screw fixes the U-shaped pressure plate and generates downward pressure through the pressure plate.

3. The tooling for drilling positioning pin holes between bearings and base frames according to claim 2, characterized in that, The fixture also includes a T-nut. A T-slot is provided on the test platform, and a T-nut is placed in the T-slot. The bottom of the fixture screw is connected to the T-nut.

4. The tooling for drilling positioning pin holes between bearings and base frames according to claim 2, characterized in that, The height of the support pad is equal to the height of the motor base frame plus the height of the bottom frame of the limit window, so that the U-shaped pressure plate is set horizontally, and the distance between the support pad and the motor base frame matches the length of the U-shaped pressure plate.

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