CN221147926U

CN221147926U - Nut pretightening force debugging device

Info

Publication number: CN221147926U
Application number: CN202322839652.1U
Authority: CN
Inventors: 李围; 储志豪; 刘飞
Original assignee: Jiangsu Dingzhi Intelligent Control Technology Co ltd
Current assignee: Jiangsu Dingzhi Intelligent Control Technology Co ltd
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2024-06-14
Anticipated expiration: 2033-10-23

Abstract

The utility model discloses a nut pretightening force debugging device, which comprises a motor fixing seat, a tension meter and a dial indicator, wherein the motor fixing seat is fixed with the axial end part of a stepping motor, a pretightening nut in the stepping motor faces one side of the motor fixing seat, the motor fixing seat is provided with an adjusting hole for exposing the pretightening nut, and a torque wrench adjusts pretightening force of the pretightening nut through the adjusting hole; the tension meter is positioned at one axial end of the stepping motor and is used for jacking one end of a rotating shaft of the stepping motor; the dial indicator is positioned at the other axial end of the stepping motor and is abutted with the other end of the rotating shaft; the dial indicator measures the axial displacement of the rotating shaft under the action of certain axial force, and the pretightening force of the pretightening nut is adjusted according to the displacement. According to the utility model, the pre-tightening nut is exposed, so that the pre-tightening force can be adjusted without backing the dial indicator and the tension meter.

Description

Nut pretightening force debugging device

Technical Field

The utility model relates to the technical field of stepping motor debugging, in particular to a nut pretightening force debugging device.

Background

The rotating shaft of the stepping motor is axially limited by the pre-tightening nut at the bearing, the pre-tightening nut applies axial pre-tightening force to the rotating shaft, and the pre-tightening force with reasonable magnitude can ensure that the rotor and the bearing have no obvious axial displacement in the working process, so that the supporting rigidity of the shaft is improved, the normal engagement of the pre-tightening nut is ensured, the product precision and the working performance are ensured, and the axial pre-tightening device is particularly important for products with high precision requirements. If the pretightening force is too large, the transmission resistance is increased, the bearing abrasion is accelerated, the bearing is warmed up during working, and then the motor is warmed up integrally, so that the service life of the bearing and the working performance of the motor are seriously influenced; if the pretightening force is too small, a certain amount of axial displacement can be generated on the rotor and the bearing in operation, and the working accuracy, service life and performance of the motor are greatly reduced.

In the production assembly, staff can only install the pre-tightening nut on the outer side of the bearing by virtue of hand feeling, and cannot accurately obtain feedback about the pre-tightening force; the torque obtained by means of a torque wrench and the like is not effective real pretightening force data, and therefore, a measuring device capable of accurately moving the pretightening force vertically needs to be designed.

Disclosure of utility model

The utility model provides a nut pretightening force debugging device for solving the technical problem that a pretightening force cannot be accurately fed back by installing a pretightening nut on the outer side of a bearing by virtue of hand feeling in the prior art.

The technical scheme adopted for solving the technical problems is as follows: the nut pretightening force debugging device comprises a motor fixing seat, a tension meter and a dial indicator, wherein the motor fixing seat is fixed with the axial end part of a stepping motor, a pretightening nut in the stepping motor faces one side of the motor fixing seat, the motor fixing seat is provided with an adjusting hole for exposing the pretightening nut, and a torque spanner adjusts pretightening force of the pretightening nut through the adjusting hole; the tension meter is positioned at one axial end of the stepping motor and is used for jacking one end of a rotating shaft of the stepping motor; the dial indicator is positioned at the other axial end of the stepping motor and is abutted with the other end of the rotating shaft; the dial indicator measures the axial displacement of the rotating shaft under the action of certain axial force, and the pretightening force of the pretightening nut is adjusted according to the displacement.

Further, the device also comprises a motor clamping plate positioned at the end part of the stepping motor and a first translation component for driving the motor clamping plate to move along the axial direction; the motor clamping plate and the motor fixing seat are clamped at two axial ends of the stepping motor.

Further, the device also comprises a bottom plate, and the motor fixing seat is arranged on the bottom plate.

Further, a second translation assembly is fixed on the bottom plate and drives the tension meter to move along the axial direction.

Further, a third translation assembly is fixed on the bottom plate and drives the dial indicator to move axially.

Further, the second translation assembly is a screw guide rail module with a self-locking function.

Further, the first translation assembly is a cylinder.

Further, the third translation assembly comprises a linear guide rail fixed with the bottom plate and a mounting seat in sliding fit with the linear guide rail, the dial indicator is fixed on the mounting seat, and the mounting seat is fixedly abutted with the linear guide rail through a bolt.

Further, the automatic control device also comprises a manual reversing valve, wherein the manual reversing valve controls the motion state of the cylinder.

Further, at least two torque holes are formed in the axial end face of the pre-tightening nut, and the torque wrench is provided with a pin column inserted into the torque holes.

The beneficial effects of the utility model are as follows:

(1) According to the nut pretightening force debugging device, axial pressure is generated on the rear end of the rotating shaft by the tension meter, the rotating shaft can generate certain displacement, and the dial indicator is used for measuring the displacement at the front end of the rotating shaft, so that whether the displacement of the rotating shaft is qualified or not can be judged in a certain range when certain axial force is applied to the rotating shaft, and the pretightening force can be adjusted under the condition that the dial indicator and the tension meter are not required to be retracted due to the fact that the pretightening nut is exposed.

(2) According to the nut pretightening force debugging device, the pretightening force is adjusted by matching the torque hole at the end part of the pretightening nut with the torque spanner, so that the pretightening nut can be conveniently screwed or unscrewed in the measuring process, and the operation is simple and convenient.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of a stepper motor;

FIG. 2 is a perspective view of a torque wrench according to the present utility model

FIG. 3 is a schematic diagram of the adjustment of the pretension by means of a torque wrench;

Fig. 4 is a first view of the nut pretension adjustment device according to the present utility model;

fig. 5 is a second view schematic diagram of the nut pretension adjustment device according to the present utility model.

In the figure, 1, a motor fixing seat, 101, an adjusting hole, 2, a tension meter, 3, a dial indicator, 4, a stepping motor, 401, a pre-tightening nut, 4011, a torque hole, 402, a rotating shaft, 403, a bearing, 404, a shell, 5, a torque wrench, 501, a pin, 6, a motor clamping plate, 7, a first translation assembly, 701, a kidney-shaped hole, 8, a second translation assembly, 9, a third translation assembly, 901, a linear guide rail, 902, a mounting seat, 10, a manual reversing valve, 11 and a bottom plate.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The utility model provides a nut pretightning force debugging device, includes motor fixing base 1, tensiometer 2 and amesdial 3, and motor fixing base 1 is fixed with the axial tip of step motor 4, and the pretightning nut 401 in the step motor 4 is towards motor fixing base 1 one side, and motor fixing base 1 has the regulation hole 101 that makes pretightning nut 401 expose outward, and torque wrench 5 adjusts pretightning force of pretightning nut 401 through regulation hole 101; the tension meter 2 is positioned at one axial end of the stepping motor 4 and is used for pushing one end of a rotating shaft 402 of the stepping motor 4; the dial indicator 3 is positioned at the other axial end of the stepping motor 4 and is abutted with the other end of the rotating shaft 402; the dial indicator 3 measures the axial displacement of the rotating shaft 402 under the action of a certain axial force, and the pretightening force of the pretightening nut 401 is adjusted according to the displacement. The dial indicator 3 and the tension meter 2 are preferably digital display dial indicators and digital display tension meters, so that displacement values and pressure values can be conveniently observed in real time.

As shown in fig. 1, a rotating shaft 402 of the stepping motor 4 is fixed to a housing 404 by a bearing 403, and a preload nut 401 is mounted on the front end bearing 403 to axially fix the rotating shaft 402. The utility model takes one end of the stepping motor 4 where the pre-tightening nut 401 is positioned as the front end and the other end as the rear end.

As shown in fig. 4 and 5, the motor fixing seat 1 is fixed with the casing 404 at the front end of the stepper motor 4, the front end of the pre-tightening nut 401 is exposed to the outside through the adjusting hole 101, and the pre-tightening force of the pre-tightening nut 401 can be adjusted at the front end by using the torque wrench 5 on the premise of not disassembling the fixed state of the stepper motor 4, so that the pre-tightening force can be measured in real time, repeated disassembly is not needed, and the measurement is more accurate and efficient.

The axial end face of the pretensioning nut 401 is provided with at least two torque holes 4011, and the torque wrench 5 has a pin 501 inserted into the torque holes 4011. As shown in fig. 2, which is a schematic diagram of the torque wrench 5, two pins 501 on the side of the torque wrench 5 in fig. 3 can be inserted into the torque hole 4011 of the pre-tightening nut 401 from the front end of the stepper motor 4, and the pre-tightening force can be adjusted without retracting the dial indicator 3 and the tension meter 2.

In order to ensure the stability of the fixation of the stepper motor 4, preferably, the device further comprises a motor clamping plate 6 positioned at the end part of the stepper motor 4 and a first translation assembly 7 for driving the motor clamping plate 6 to move along the axial direction; the motor clamping plate 6 and the motor fixing seat 1 are clamped at two axial ends of the stepping motor 4. The motor clamping plate 6 is used for clamping and fixing the stepper motor 4 during detection, preferably nylon materials are used, the appearance is attractive, and the flexible materials can prevent the surface of the stepper motor 4 from being scratched unnecessarily.

The whole device can be arranged on the bottom plate 11, so that the whole carrying is convenient. As shown in fig. 4, the motor mount 1 and the first translation assembly 7 are fixed on the base plate 11.

The first translation assembly 7 is used for outputting linear motion, and since the motor clamping plate 6 is located between the tension meter 2 and the stepping motor 4, the first translation assembly 7 adopts a cylinder with smaller occupied space. The first translation assembly 7 is fixed with the bottom plate 11, a waist-shaped hole 701 can be formed in the bottom of the first translation assembly 7, the position can be adjusted according to the stepping motors 4 with different sizes, the universality of the device is guaranteed, and the device is suitable for the stepping motors 4 with different models; for example, currently, according to the design of the longest circumferential dimension of the stepper motor 4, a proper gap is arranged between the first translation assembly 7 and the tension meter 2, and when the axial dimension of the motor becomes smaller, the first translation assembly 7 can move forward through the waist-shaped hole.

Preferably, when the first translation assembly 7 is a cylinder, the cylinder movement state can be controlled by the manual directional valve 10 in order to ensure the rapid operation of the cylinder.

In a further design, a second translation assembly 8 is fixed on the bottom plate 11, and the second translation assembly 8 drives the tension meter 2 to move along the axial direction. The second translation assembly 8 generally includes a power source and a sliding rail, and the second translation assembly 8 in this embodiment may employ a screw rail module with a self-locking function, which may be commercially available, as shown in the figure, and is a hand-operated screw rail module.

Similarly, a third translation assembly 9 can be fixed on the bottom plate 11, and the third translation assembly 9 drives the dial indicator 3 to move along the axial direction. As shown in the figure, the third translation assembly 9 includes a linear guide rail 901 fixed to the bottom plate 11 and a mounting seat 902 slidably matched with the linear guide rail 901, and after the dial indicator 3 is pushed to the front end of the rotating shaft 402, locking can be completed only by screwing bolts on two sides of the mounting seat 902 by using a wrench, so that the mounting seat 902 cannot slide in a displacement manner, and validity of test data is ensured.

The dial indicator 3 is fixed to the mount 902, and the mount 902 is fixed to the linear rail 901 by a bolt. A linear guide rail 901 is arranged below the mounting seat 902, so that the front end of the rotating shaft 402 can be prevented from touching the gauge outfit when the stepping motor 4 is mounted, and the stepping motor 4 is convenient to mount; the front end position of the motor is also emptied, and the motor is applicable to motors with different shaft lengths.

The operation steps are as follows:

Firstly, the dial indicator 3 and the tension meter 2 are moved to two sides of the device, then the stepping motor 4 is installed on the motor fixing seat 1, the manual reversing valve 10 is pulled to enable the cylinder to push the motor clamping plate 6 to fix the stepping motor 4, then the dial indicator 3 is jacked to the front end of the rotating shaft 402, bolts on two sides of the installation seat 902 are locked, the installation seat 902 is prevented from sliding, and then the dial indicator 3 is zeroed.

The thimble of the tension meter 2 is pushed to the rear end of the rotating shaft 402 by using a hand wheel, then the hand wheel is slowly rotated, the pressure feedback on the tension meter 2 is observed, when the pressure to be applied is displayed on a screen, the rotation is stopped immediately, and whether the displacement value on the dial indicator 3 is in the range is checked. The screw guide rail module contains the auto-lock, can not cause pressure change at the displacement after the pine hand.

If the fed back displacement is in the range, the pretightening force is qualified; if not, the pre-tightening nut 401 is then screwed or unscrewed using the torque wrench 5 until the displacement is within the range.

Finally, the manual reversing valve 10 is pulled to retract the first translation assembly, and the stepping motor 4 is taken out.

In the description of the present utility model, it should be understood that the terms "front," "rear," "axial," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Some devices for detecting axial or radial force of a motor exist in the prior art, and no device for detecting the pretightening force of the pretightening nut 401 exists, because the detection objects are different,

In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides a nut pretightning force debugging device which characterized in that includes:

The motor fixing seat (1) is fixed with the axial end part of the stepping motor (4), a pre-tightening nut (401) in the stepping motor (4) faces one side of the motor fixing seat (1), the motor fixing seat (1) is provided with an adjusting hole (101) for exposing the pre-tightening nut (401), and the torque wrench (5) adjusts the pre-tightening force of the pre-tightening nut (401) through the adjusting hole (101);

The tension meter (2) is positioned at one axial end of the stepping motor (4) and is used for jacking one end of a rotating shaft (402) of the stepping motor (4);

The dial indicator (3) is positioned at the other axial end of the stepping motor (4) and is abutted with the other end of the rotating shaft (402);

The dial indicator (3) measures the axial displacement of the rotating shaft (402) under the action of certain axial force, and the pretightening force of the pretightening nut (401) is adjusted according to the displacement.

2. The nut pretension adjustment device according to claim 1, characterized in that: the device also comprises a motor clamping plate (6) positioned at the end part of the stepping motor (4) and a first translation component (7) for driving the motor clamping plate (6) to move along the axial direction; the motor clamping plate (6) and the motor fixing seat (1) are clamped at two axial ends of the stepping motor (4).

3. The nut pretension adjustment device according to claim 1, characterized in that: the device also comprises a bottom plate (11), and the motor fixing seat (1) is arranged on the bottom plate (11).

4. A nut tightening force adjustment device as defined in claim 3, characterized in that: the bottom plate (11) is fixedly provided with a second translation assembly (8), and the second translation assembly (8) drives the tension meter (2) to move along the axial direction.

5. A nut tightening force adjustment device as defined in claim 3, characterized in that: a third translation assembly (9) is fixed on the bottom plate (11), and the third translation assembly (9) drives the dial indicator (3) to move along the axial direction.

6. The nut pretension adjustment device according to claim 4, characterized in that: the second translation assembly (8) is a screw guide rail module with a self-locking function.

7. The nut pretension adjustment device according to claim 2, characterized in that: the first translation assembly (7) is a cylinder.

8. The nut pretension adjustment device according to claim 5, characterized in that: the third translation assembly (9) comprises a linear guide rail (901) fixed with the bottom plate (11) and a mounting seat (902) in sliding fit with the linear guide rail (901), the dial indicator (3) is fixed on the mounting seat (902), and the mounting seat (902) is in butt joint and fixation with the linear guide rail (901) through bolts.

9. The nut pretension adjustment device according to claim 7, characterized in that: the manual reversing valve (10) is further included, and the manual reversing valve (10) controls the motion state of the cylinder.

10. The nut pretension adjustment device according to claim 1, characterized in that: the axial end face of the pre-tightening nut (401) is provided with at least two torque holes (4011), and the torque wrench (5) is provided with a pin (501) inserted into the torque holes (4011).