Pre-tightening force tool

Abstract

The utility model discloses a pretightening force tool, and particularly relates to the technical field of motor nut pretightening force regulation and control, the pretightening force tool comprises a base, a regulation and control detection assembly is arranged on the base, the regulation and control detection assembly comprises an electric push rod arranged at the top of the base, and an electric push rod is arranged at the top of the electric push rod. According to the utility model, through the corresponding cooperative use of each structure, the mechanical adjustment and precise measurement of the pre-tightening force are realized, the problems of low precision and poor efficiency of the traditional manual operation are solved, and the coaxial arrangement of the pull and push dynamometer and the dial gauge ensures the accuracy of the measurement of the force value and the deformation amount.

Description

Technical Field

[0001] This utility model relates to the field of motor nut preload control technology, and more specifically, to a preload tooling. Background Technology

[0002] In the manufacturing and assembly process of motors, preload refers to the initial tightening force applied to the connection points in the connection of motor components through a specific method (such as tightening nuts). The magnitude of the preload has an important impact on the performance and reliability of the motor. Appropriate preload can ensure that the connection between the various components of the motor is tight, reduce loosening and relative displacement, thereby reducing vibration and noise, and improving the operating stability and accuracy of the motor.

[0003] Traditional methods for adjusting motor preload rely primarily on experience and manual operation. Due to a lack of precise measuring tools, it's difficult to accurately determine the motor's deformation under different preloads, making it impossible to precisely judge whether the preload is appropriate. This results in low preload control precision. Furthermore, manually adjusting the preload nut is cumbersome and difficult to control precisely, lacking an effective feedback mechanism. Operators often struggle to determine if the adjusted preload has reached the ideal state, requiring multiple attempts and adjustments, wasting both time and manpower. Therefore, this paper provides a preload adjustment fixture for motors. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pre-tightening tooling, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a pre-tightening tooling, including a base, on which an adjustment and detection component is provided;

[0006] The control and detection component includes an electric push rod disposed on the top of the base, an electric push rod on the top of the electric push rod, a limiting plate for supporting the motor disposed at the output end of the electric push rod, and a support plate disposed on the top of the electric push rod.

[0007] An adjusting cylinder is provided on the side of the support plate away from the limiting plate, which abuts against the motor nut. One end of the adjusting cylinder is provided with a locking block that engages with the motor nut. A screw drive module is provided at the top end of the base. The screw drive module is provided with a position-adjustable push-pull force gauge, and the push-pull force gauge is provided with a push rod for pressure detection. The push rod and the adjusting cylinder are on the same axis, and one end of the push rod passes through the limiting plate.

[0008] Optionally, in one possible implementation, a slide rail is provided on one side of the electric push rod, an adjustable slider is provided on the slide rail, a dial indicator is provided on the slider, the dial indicator, the push-pull force gauge, the push rod and the adjusting cylinder are all on the same axis, and a misalignment opening is provided on the outer side of the adjusting cylinder, and two abutment wheels are provided on the side of the limiting plate facing the adjusting cylinder and are rotatably connected to the limiting plate;

[0009] The technical effects and advantages of this utility model are as follows:

[0010] Through the coordinated use of various structures, the mechanized adjustment and precise measurement of preload force are realized, solving the problems of low precision and poor efficiency in traditional manual operation. The coaxial setting of the push-pull force gauge and the dial indicator ensures the accuracy of force and deformation measurement.

[0011] The lead screw drive module, in conjunction with the electric push rod, can adapt to the testing requirements of motors of different specifications. The rolling contact of the abutment wheel reduces frictional interference during the adjustment process. The overall operation does not require multiple attempts, which greatly improves the efficiency and accuracy of preload control. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0013] Figure 1 This is a front view of the overall structure of this utility model.

[0014] Figure 2 This is a top view of the control and detection component of this utility model.

[0015] Figure 3 This is a schematic diagram of the electric push rod, support plate, adjusting cylinder, locking block, limiting plate and abutment wheel of this utility model.

[0016] Figure 4 This is a schematic diagram of the base, slider, dial indicator, lead screw transmission module, and push-pull force gauge of this utility model.

[0017] The attached diagram is labeled as follows: 1. Base; 2. Electric push rod; 3. Support plate; 4. Limiting plate; 5. Abutment wheel; 6. Adjusting cylinder; 7. Locking block; 8. Screw drive module; 9. Push-pull force gauge; 10. Top rod; 11. Slider; 12. Dial indicator; 13. Slide rail. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] This embodiment discloses a preload tooling, which aims to achieve precise control and detection of motor preload through the combination of mechanized structure and precision measuring components, thereby solving the problems of low precision and poor efficiency in traditional manual operation;

[0021] like Figure 1 As shown, the fixture includes a base 1, which can be fixed to a horizontal worktable by bolts. The top of the base 1 integrates a control and detection assembly, specifically including the following components:

[0022] Electric push rod 2: Model DTZ300, rated thrust 300N, stroke 100mm, installed on the top of base 1, its output end is rigidly connected to limit plate 4 through flange, used to drive limit plate 4 to move and realize the adjustment of the lifting position of motor, and the top of electric push rod 2 is provided with support plate 3 to support the other end of motor.

[0023] Limiting plate 4: Can be made of aluminum alloy, with two abutting wheels 5 rotatably connected to the side facing the adjusting cylinder 6 via bearings, such as... Figure 3 As shown, the abutment wheel 5 can be made of polyurethane and is used to make rolling contact with the motor housing, which not only restricts the radial displacement of the motor, but also reduces the frictional resistance during the adjustment process.

[0024] Adjusting cylinder 6: Installed on the side of the support plate 3 away from the limiting plate 4, its axis is perpendicular to the support plate 3, and a locking block 7 is integrally formed at the end near the motor, such as... Figure 3 As shown, the locking block 7 can be hexagonal in shape to fit the hexagonal groove of the motor nut, and the outer side of the adjusting cylinder 6 is provided with a misalignment opening to avoid interference between the adjusting cylinders 6.

[0025] Screw drive module 8: Installed at the top of base 1 at the end furthest from the electric push rod 2, such as... Figure 2 As shown, its slider is fixedly connected to the push-pull force gauge 9 by bolts, which can drive the push-pull force gauge 9 to move in the horizontal direction.

[0026] Push-pull force gauge 9: Model HF-200, fixed on the slider of the lead screw drive module 8, its output end is connected to a push rod 10, the push rod 10 is coaxially arranged with the adjusting cylinder 6, and the push rod 10 passes through the center hole of the limiting plate 4, such as Figure 1As shown, it is used to apply axial thrust to the motor and provide real-time feedback of the force value.

[0027] Dial indicator 12: Mounted on slide rail 13 via slider 11, such as... Figure 4 As shown, the slide rail 13 is fixed to one side of the electric push rod 2 parallel to the axis of the push rod 10. The slider 11 can slide along the slide rail 13 to adjust the position of the dial indicator 12. Its probe contacts the end of the motor and is used to measure the small deformation of the motor under the action of preload.

[0028] The specific working principle is as follows: Install the motor: Place the motor to be tested on the limiting plate 4, making the motor housing contact the contact wheel 5. Adjust the DTZ300 electric drive push rod 2 to drive the limiting plate 4 to move laterally, facilitating the alignment of the motor nut with the locking block 7 of the adjusting cylinder 6. Push the adjusting cylinder 6 to make the locking block 7 engage in the hexagonal groove of the motor nut. Figure 3 As shown.

[0029] The push-pull force gauge 9 (model HF-200) is driven by the lead screw transmission module 8 to move, so that the end of the push rod 10 contacts the other end face of the motor. At the same time, the slider 11 on the sliding rail 13 moves the probe of the dial indicator 12 against the end of the motor near the adjusting cylinder 6, and the dial indicator 12 and the push-pull force gauge 9 are zeroed.

[0030] The rotating screw drive module 8 drives the push-pull force gauge 9 to slowly advance the push rod 10. The push rod 10 applies axial thrust to the motor. At this time, the push-pull force gauge 9 displays the thrust value in real time, which is the simulated preload value. The dial indicator 12 records the deformation of the motor simultaneously. When the motor nut starts to rotate, the locking block 7 rotates synchronously with the nut. The misalignment of the adjusting cylinder 6 can avoid interference with other components. At this time, the reading of the push-pull force gauge 9 is the current preload value, and the reading of the dial indicator 12 is the corresponding deformation.

[0031] According to the test data, if the preload is insufficient, the adjusting cylinder 6 is rotated so that the motor nut and the locking block 7 are tightly engaged until the preset preload is reached; if the preload is too large, the adjusting cylinder 6 is rotated in the opposite direction so that the nut is rotated in the opposite direction to release part of the preload. During the process, the dial indicator 12 provides real-time feedback on the deformation to ensure that the preload and the deformation are matched.

[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A preload tooling, comprising a base (1), characterized in that: The base (1) is provided with a control and detection component; The control and detection component includes an electric push rod (2) set on the top of the base (1), the top of the electric push rod (2) is provided with an electric push rod (2), the output end of the electric push rod (2) is provided with a limiting plate (4) for lifting the motor, and the top of the electric push rod (2) is provided with a support plate (3). The side of the pallet (3) away from the limiting plate (4) is provided with an adjusting cylinder (6) that abuts against the motor nut, and one end of the adjusting cylinder (6) is provided with a locking block (7) that engages with the motor nut.

2. The preload tooling according to claim 1, characterized in that: The base (1) is provided with a screw drive module (8) at one end of the top. The screw drive module (8) is provided with a position-adjustable push-pull force gauge (9), and the push-pull force gauge (9) is provided with a push rod (10) for pressure detection.

3. The preload tooling according to claim 2, characterized in that: The top rod (10) and the adjusting cylinder (6) are on the same axial direction, and one end of the top rod (10) passes through the limiting plate (4).

4. The preload tooling according to claim 1, characterized in that: A slide rail (13) is provided on one side of the electric push rod (2), and an adjustable slider (11) is provided on the slide rail (13), and a dial indicator (12) is provided on the slider (11).

5. A preload tooling according to claim 4, characterized in that: The dial indicator (12), push-pull force gauge (9), push rod (10) and adjusting cylinder (6) are all on the same axis, and the adjusting cylinder (6) has a misalignment opening on its outer side.

6. The preload tooling according to claim 1, characterized in that: The limiting plate (4) has two abutting wheels (5) on the side facing the adjusting cylinder (6), and they are rotatably connected to the limiting plate (4).

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