CN215639925U

CN215639925U - Dynamic balance detection clamp

Info

Publication number: CN215639925U
Application number: CN202121873257.XU
Authority: CN
Inventors: 张振潮; 谢鹏飞; 铁晓艳; 张致远; 赵雁; 杨林; 爨浩宸; 谢宜康
Original assignee: Luoyang Bearing Research Institute Co Ltd
Current assignee: Luoyang Bearing Research Institute Co Ltd
Priority date: 2021-08-11
Filing date: 2021-08-11
Publication date: 2022-01-25
Anticipated expiration: 2031-08-11

Abstract

The utility model relates to a dynamic balance detection clamp, which specifically comprises: the fixed core shaft is used for being fittingly arranged in a hollow supporting shaft of the flywheel to be detected in a penetrating mode and is matched with the supporting shaft in a rotation stopping mode in the circumferential direction; the two end limiting pieces are respectively connected to the ends of the fixed core shaft, the two end limiting pieces are respectively provided with an axial limiting surface, and the axial limiting surfaces of the two end limiting pieces are mutually matched to axially position the flywheel to be detected; at least one of the two end limiting parts is detachably connected with the fixed mandrel, and at least one of the two end limiting parts is provided with a connecting end used for being connected with the dynamic balancing machine. The dynamic balance detection clamp disclosed by the utility model does not need to arrange internal threads on the hollow supporting shaft, so that the structural strength of the hollow supporting shaft is ensured, the clamping is convenient, and the structure is simple.

Description

Dynamic balance detection clamp

Technical Field

The utility model relates to a dynamic balance detection clamp.

Background

The satellite uses the flywheel as an attitude control execution component, which puts high requirements on the control precision and reliability of the flywheel. In many cases, due to factors such as materials, machining, and assembly, the center of mass and the rotation axis of the flywheel often do not coincide, resulting in uneven mass distribution of the flywheel, which in turn adversely affects the precision and stability of the flywheel. Therefore, it is generally necessary to correct the dynamic balance of the flywheel before it is used.

As shown in fig. 1, the flywheel integrated with the brushless motor rotor integrally comprises a hollow supporting shaft 5, one end of the supporting shaft 5 is fixedly connected with a motor base 11, the outer edge of the motor base 11 is fixedly connected with a motor stator 2, the outer side of the supporting shaft 5 is provided with a bearing assembly 4, and a bearing seat 3 matched with the bearing assembly 4 is fixedly connected with a flywheel rotor 1 integrated with the motor rotor. The end of the support shaft 5 opposite to the motor base 11 is screwed with a lock nut 6 which cooperates with a shoulder of the support shaft 5 to clamp and secure the bearing assembly 4.

For the flywheel, an internal thread is respectively processed at two ends of an inner hole of a hollow supporting shaft, and then a supporting rod is connected through the internal thread and is mounted on a dynamic balancing machine through the supporting rod for a dynamic balancing test. However, for a miniature flywheel, the size and the mass of the bearing are limited, the wall thickness of the supporting shaft is thin, the wall thickness of a single side is about 2mm, and if the internal thread is processed, the strength of the supporting shaft cannot meet the requirement. For the micro flywheel, a convenient and practical dynamic balance detection clamp is not provided at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a dynamic balance detection clamp which is used for clamping and fixing a micro flywheel and is convenient for dynamic balance detection.

The dynamic balance detection clamp of the utility model comprises:

the fixed core shaft is used for being fittingly arranged in a hollow supporting shaft of the flywheel to be detected in a penetrating mode and is matched with the supporting shaft in a rotation stopping mode in the circumferential direction;

the two end limiting pieces are respectively connected to the ends of the fixed core shaft, the two end limiting pieces are respectively provided with an axial limiting surface, and the axial limiting surfaces of the two end limiting pieces are mutually matched to axially position the flywheel to be detected;

at least one of the two end limiting parts is detachably connected with the fixed mandrel, and at least one of the two end limiting parts is provided with a connecting end used for being connected with the dynamic balancing machine.

The dynamic balance detection clamp is arranged in the hollow supporting shaft of the flywheel in a penetrating mode through the fixing core shaft and is matched with the supporting shaft in a rotation stopping mode in the circumferential direction, so that the radial and circumferential reliable positioning of the supporting shaft is achieved, the flywheel arranged on the fixing core shaft in a penetrating mode can be positioned in the axial direction through the two end limiting pieces connected with the two ends of the fixing core shaft, and the clamp can reliably clamp the flywheel to be detected. The fixture does not need to be provided with internal threads on the hollow supporting shaft, ensures the structural strength of the hollow supporting shaft, and has convenient clamping and simple structure.

Furthermore, the peripheral surface of the fixed core shaft is a conical surface, and rotation stopping is realized through interference fit of the conical surface and the hollow supporting shaft. The fixed core shaft adopts a taper design, is matched with the flywheel supporting shaft, is simple and convenient to align, and has good coaxiality after installation.

Furthermore, the fixed mandrel is a solid shaft, so that the structural strength of the fixed mandrel is guaranteed.

Further, be equipped with the internal thread hole on the tip locating part with fixed dabber releasable connection, the tip of fixed dabber is equipped with the external screw thread section, and the tip locating part passes through the cooperation of internal thread hole and external screw thread section and connects on fixed dabber. The threaded connection is convenient to disassemble and assemble and simple to use.

Further, two tip locating parts all with fixed dabber releasable connection. The structure is more flexible and convenient to use.

Further, the both ends of fixed dabber all are equipped with the external screw thread section, are equipped with the internal thread hole on two tip locating parts respectively, and two tip locating part threaded connection are at the both ends of fixed dabber. Threaded connection easy dismounting, it is simple to use, can compress tightly respectively from both ends position moreover and wait to detect the flywheel, guaranteed to the flywheel at ascending reliable positioning of axial.

Furthermore, the end limiting part is a limiting supporting rod, the end face of the end of the limiting supporting rod, which is provided with the internal threaded hole, forms the axial limiting surface, and the end of the limiting supporting rod, which faces away from the internal threaded hole, forms the connecting end. The end limiting part with the structure has a simple structure and is convenient to be connected with a dynamic balancing machine.

Furthermore, the fixed mandrel is symmetrical about the middle section in the length direction, and the structures of the two end limiting parts are the same. Therefore, the processing cost of the parts is reduced, and the universality of the parts is improved.

In addition, fixed dabber and tip locating part are G95Cr18 stainless steel, guarantee that fixed dabber and tip locating part have higher hardness and wearability.

And the surface roughness of the fixed core shaft is less than or equal to 0.8 mu m, and the matching precision is higher when the fixed core shaft is matched with the inner hole of the supporting shaft of the flywheel to be detected, thereby being beneficial to the detection of dynamic balance.

Drawings

FIG. 1 is a schematic diagram of a conventional flywheel integrated with an electronic rotor;

FIG. 2 is a schematic structural view of the dynamic balance detecting jig of the present invention;

fig. 3 is a schematic structural view of the dynamic balance detection clamp of the present invention in use.

In the figure: 1. a flywheel rotor; 11. a motor base; 2. a motor stator; 3. a bearing seat; 4. a bearing assembly; 5. a support shaft; 6. locking the nut; 7. a limit support rod; 70. an axial limiting surface; 12. fixing the mandrel; 120. the peripheral surface of the mandrel; 121. an external threaded section.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The first embodiment of the dynamic balance detection clamp of the utility model is as follows:

the dynamic balance detection clamp of the present embodiment is shown in fig. 2-3, and includes a fixed mandrel 12 and two end position limiting members, where the two end position limiting members are both separated from the fixed mandrel 12, and are detachably connected to two ends of the fixed mandrel 12.

Specifically, the fixed core shaft 12 is a solid shaft and has high structural strength. The fixed mandrel 12 comprises a middle matching section and threaded connection sections at two ends of the middle matching section, and the threaded connection sections are respectively provided with external threaded sections 121. The dabber outer peripheral face 120 of middle part cooperation section is the conical surface, and when fixed dabber 12 worn to adorn in the supporting axle 5 hole of waiting to detect the flywheel, the threaded connection end at fixed dabber 12 both ends stretches out in the supporting axle 5 of waiting to detect the flywheel, and middle part cooperation section is through the hole interference fit of conical surface and supporting axle 5, has not only realized treating the coaxial alignment location of detecting the flywheel in radial, has realized moreover and has waited the circumference of detecting the flywheel and has stopped changeing.

The end part limiting part is a limiting supporting rod 7, the whole body is of a rod body structure, and an internal threaded hole is formed in the end part of the limiting supporting rod 7 and is used for being in threaded connection with a threaded connection section extending out of an inner hole of a supporting shaft 5 of the flywheel to be detected. The end position-limiting member further has an axial position-limiting surface 70 for stopping and limiting the flywheel to be detected at two axial ends (i.e., the motor base 11 and the lock nut 6), and in this embodiment, the axial position-limiting surface 70 is formed by an end surface of the position-limiting support rod 7 at one end where the internal threaded hole is formed. Therefore, the two end limiting parts are respectively screwed from two sides of the fixed mandrel 12, so that the flywheel to be detected can be clamped from two sides, and the flywheel to be detected can be reliably positioned in the axial direction. The end part of the end part limiting part, which is back to the internal thread hole, is used for being connected with the dynamic balancing machine to form a connecting end.

Through the above description, the state of the dynamic balance detecting clamp of the present embodiment in use can be clearly known with reference to fig. 3. After the flywheel to be detected is reliably inserted into the fixed mandrel 12 and is reliably axially positioned by the limiting pieces at the two end parts, the clamped whole shown in fig. 3 is installed on a dynamic balancing machine, then the motor stator 2 is powered, the flywheel rotor 1 rotates at a high speed, and the dynamic balance of the flywheel rotor 1 can be detected through the dynamic balancing machine.

In addition, the design of optimizing more, fixed dabber 12 is symmetrical about its length direction's middle cross-section, and the structure of two tip locating parts is the same, so reduced the processing cost of spare part, improved the commonality of spare part. Moreover, the fixed mandrel 12 and the end limiting piece are made of G95Cr18 stainless steel, so that the fixed mandrel 12 and the end limiting piece are guaranteed to have high hardness and wear resistance. The surface roughness of the fixed mandrel 12 is less than or equal to 0.8 mu m, and the matching precision is higher when the fixed mandrel is matched with the inner hole of the supporting shaft 5 of the flywheel to be detected, thereby being beneficial to the detection of dynamic balance.

The dynamic balance detection clamp has a simple structure, is convenient to use, and particularly does not need to process a threaded section in an inner hole of a supporting shaft of the microminiature flywheel when the microminiature flywheel is clamped and fixed, so that the structural strength of the supporting shaft of the microminiature flywheel is ensured, and the service life of the microminiature flywheel is prolonged.

Of course, the dynamic balance detecting jig of the present invention is not limited to the above-described embodiment, and various modifications are possible in other embodiments.

For example, in other embodiments, different from the first embodiment described above, the outer circumferential surface of the fixing mandrel is an outer cylindrical surface, and the outer cylindrical surface is in interference fit with the inner hole of the hollow supporting shaft of the flywheel to be detected, so that radial fixing and circumferential rotation stopping are realized; or the peripheral surface of the fixed core shaft is an outer cylindrical surface and is just matched with the inner hole of the hollow supporting shaft of the flywheel to be detected, and the fixed core shaft and the inner hole are matched through a key to realize rotation stopping.

For example, in other embodiments, different from the first embodiment described above, one of the two end position limiters is integrally disposed with the fixed mandrel, and the other end position limiter is in threaded connection with the fixed mandrel, where the fixed mandrel has an asymmetric structure; or the two end part limiting parts are of sleeve-shaped structures, are connected with the fixed core shaft in an inserting way and are tightly fixed through the radial jackscrews, and the end faces of the cylindrical end part limiting parts form an axial limiting face.

For another example, in another embodiment, different from the embodiment described above, on the premise that the structural strength is ensured, the fixing mandrel may be a hollow shaft, at this time, internal threads may be provided at two ends of the inner hole of the fixing mandrel, and the two end position limiting members are respectively matched with the internal threads of the fixing mandrel through external thread sections, so as to achieve the detachable connection between the fixing mandrel and the end position limiting members.

Of course, in other embodiments, the fixed mandrel may have an asymmetric structure, such as a longer external thread section at one end and a shorter external thread section at the other end; or one end of the fixed mandrel is in threaded connection with the end part limiting part, and the other end of the fixed mandrel and the end part limiting part are in a connection mode that the inserting sleeve is assembled and matched with the jackscrew to be tightly jacked. The materials of the fixed mandrel and the end limiting part can also adopt stainless steel with other marks, the surface roughness of the fixed mandrel can also meet different requirements according to the actual use condition, and the requirements can not be used as the limit of the dynamic balance detection clamp.

In the above embodiments, the dynamic balance detecting jig of the present invention has been described by taking the detection of the flywheel as an example, but the dynamic balance detecting jig of the present invention is not limited to the application to the flywheel, and is also applicable to other rotating members.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.

Claims

1. A dynamic balance detection clamp is characterized by comprising:

the fixed core shaft (12) is used for being fittingly arranged in the hollow supporting shaft (5) of the flywheel to be detected in a penetrating mode and is matched with the supporting shaft (5) in a circumferential rotation stopping mode;

the two end limiting pieces are respectively arranged at the end part of the fixed mandrel (12), the two end limiting pieces are respectively provided with an axial limiting surface (70), and the axial limiting surfaces (70) of the two end limiting pieces are mutually matched to axially position the flywheel to be detected;

at least one of the two end limiting parts is detachably connected with the fixed mandrel (12), and at least one of the two end limiting parts is provided with a connecting end used for being connected with a dynamic balancing machine.

2. The dynamic balance detecting jig as claimed in claim 1, wherein the outer peripheral surface of the fixing spindle (12) is a tapered surface, and the rotation stopping is achieved by interference fit of the tapered surface with the hollow support shaft (5).

3. The dynamic balance detection fixture of claim 1, wherein said stationary mandrel (12) is a solid shaft.

4. The dynamic balance detecting jig as claimed in claim 1, 2 or 3, wherein an end limiting member detachably connected to the fixing mandrel (12) is provided with an internal threaded hole, an end of the fixing mandrel (12) is provided with an external threaded section (121), and the end limiting member is connected to the fixing mandrel (12) by the engagement of the internal threaded hole and the external threaded section (121).

5. The dynamic balance detection fixture according to claim 1, 2 or 3, wherein both end stops are detachably connected to the stationary mandrel (12).

6. The dynamic balance detecting jig as claimed in claim 5, wherein the fixing spindle (12) is provided at both ends thereof with male screw sections (121), and the end stoppers are provided with female screw holes, respectively, and are screwed to both ends of the fixing spindle (12).

7. The dynamic balance detecting jig as claimed in claim 6, wherein the end limiting member is a limit support rod (7), an end surface of one end of the limit support rod (7) having the internal threaded hole constitutes the axial limiting surface (70), and an end of the limit support rod (7) facing away from the internal threaded hole constitutes the connecting end.

8. The dynamic balance testing jig as claimed in claim 7, wherein the fixing spindle (12) is symmetrical about a middle section in a length direction, and the two end stoppers are identical in structure.

9. The dynamic balance detection fixture of claim 1, 2 or 3, wherein the fixed mandrel (12) and the end stop are both G95Cr18 stainless steel.

10. The dynamic balance detection jig as claimed in claim 1, 2 or 3, wherein the surface roughness of the fixing mandrel (12) is 0.8 μm or less.