CN216699652U

CN216699652U - Toothed pressing ring applied to motor stator lamination

Info

Publication number: CN216699652U
Application number: CN202123439431.2U
Authority: CN
Inventors: 蔡妙顺; 蔡伯璋
Original assignee: Jiangsu Pinxing Explosion Proof Motor Co ltd
Current assignee: Jiangsu Pinxing Explosion Proof Motor Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-07
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a toothed pressing ring applied to motor stator lamination, which comprises a steel sleeve and a toothed pressing plate, wherein the steel sleeve is arranged in an annular shape, the toothed pressing plate is coaxially sleeved in the steel sleeve in an inner way, a tooth groove for fixing a stator coil is formed in the inner side of the toothed pressing plate, and the steel sleeve and the toothed pressing plate are integrally formed; the bottom position of the tooth groove slotting groove of the tooth pressure plate extends to the inner side wall of the steel sleeve to form a plurality of first flow blocking grooves; the outer side wall of the steel sleeve is provided with a second flow-blocking groove; first choke groove is the relative setting in interval with the second choke groove, sets up through steel bushing and tooth clamp plate integrated into one piece, work load when can effectively reducing motor stator equipment, reduce cost. Meanwhile, by arranging the flow-blocking groove and arranging the shallow groove on the surface of the steel sleeve, the induced current in the steel sleeve can be effectively reduced, so that the energy loss of the motor is reduced.

Description

Toothed pressing ring applied to motor stator lamination

Technical Field

The utility model relates to the technical field of motor accessories, in particular to a toothed pressing ring applied to motor stator lamination.

Background

The stator pressing ring is an important part in the lamination process of the stator core, and the stator core is generally fastened through the stator pressing ring by adopting a pull screw rod, a flat pull rod or a buckling piece, so that the stator core has certain inter-piece pressure, and the purpose of laminating the iron core is achieved.

The current stator clamping ring mainly comprises cyclic annular steel bushing and tooth clamp plate, and steel bushing one end is opened there is the annular tang, all is equipped with a plurality of screw holes along the circumference on the annular tang, and tooth clamp plate excircle is annular stair structure, and tooth clamp plate cover is located in the steel cover and is just through its annular stair structure and the cooperation of annular tang, and the tooth clamp plate passes through hexagon socket head cap screw and the threaded hole fastening fit on packing ring subassembly and the annular tang. Although the above-mentioned split design can reduce the heat generation of the stator pressing ring (the leakage field of the stator coil generates additional loss in the metal structural member near the winding end to cause heat generation and increase the winding temperature rise), the assembly process is added in the production and manufacturing process of the motor, so that the production efficiency is reduced and the cost is increased.

How to overcome the heating problem of the stator clamping ring, and reducing the processes and the cost is a problem to be solved urgently at present.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems that the production processes of a motor are increased and the cost is increased due to the separated design of the motor stator pressing ring in practical application, the utility model aims to provide the toothed pressing ring applied to the lamination of the motor stator, and the toothed pressing ring not only reduces the assembly process of the stator pressing ring but also effectively ensures the low heat productivity of the stator pressing ring by utilizing the integrated design, and the specific scheme is as follows:

a toothed pressing ring applied to motor stator lamination comprises a steel sleeve arranged in an annular shape and a toothed pressing plate coaxially sleeved in the steel sleeve, wherein the inner side of the toothed pressing plate is provided with a tooth groove for fixing a stator coil,

the steel sleeve and the tooth pressing plate are integrally formed;

the bottom position of the tooth groove slotting groove of the tooth pressure plate extends to the inner side wall of the steel sleeve to form a plurality of first flow blocking grooves;

the outer side wall of the steel sleeve is provided with a second flow-blocking groove;

the first flow-blocking groove and the second flow-blocking groove are oppositely arranged at intervals.

Through above-mentioned technical scheme, utilize first choked flow groove and second choked flow groove to cooperate, can reduce the current strength in the steel cover, and then reduce and generate heat, reduce the loss. Meanwhile, the whole stator pressing ring is fast and convenient to install.

Further, the cross section of the first flow-blocking groove is semicircular.

Through the technical scheme, the stator coil can be prevented from being scratched by the tooth grooves.

Further, the cross section of the second flow-blocking groove is trapezoidal.

Through the technical scheme, the current in the steel sleeve can be effectively reduced.

Furthermore, a threaded hole for a pull screw to pass through is formed in the steel sleeve along the axial direction of the steel sleeve.

Through above-mentioned technical scheme, conveniently utilize the pull screw to fix taut the stator clamping ring that is located stator both ends.

Furthermore, tooth grooves on the tooth pressing plate are unevenly arranged.

Through the technical scheme, the stator coil is clamped by the tooth pressing plate, and the current in the steel sleeve is reduced.

Furthermore, one side of the steel sleeve is provided with an annular step-shaped bulge along the axial direction of the steel sleeve.

Through above-mentioned technical scheme, make things convenient for steel bushing lateral wall and motor stator casing looks butt.

Furthermore, the first choke groove is unevenly arranged in the depth extending towards the steel sleeve.

Through above-mentioned technical scheme, because the degree of depth in first choked flow groove is not unified for the electric current that flows along steel bushing lateral wall surface can receive the hindrance, and then reduces the induced current size in the steel bushing, reduces the loss that generates heat.

Furthermore, a plurality of shallow grooves are formed in the outer surface of the steel sleeve in a direction perpendicular to the axial direction of the steel sleeve.

Through the technical scheme, the current near the surface of the steel sleeve can be effectively reduced, so that the heat productivity of the steel sleeve is reduced, and the loss is reduced.

Compared with the prior art, the utility model has the following beneficial effects:

through setting up steel bushing and tooth clamp plate integrated into one piece, work load when can effectively reducing motor stator equipment, reduce cost. Meanwhile, by arranging the flow-blocking groove and arranging the shallow groove on the surface of the steel sleeve, the induced current in the steel sleeve can be effectively reduced, so that the energy loss of the motor is reduced.

Drawings

FIG. 1 is an overall schematic view of a toothed clamping ring;

FIG. 2 is a schematic sectional view of the toothed pressing ring along the axial direction thereof;

fig. 3 is an overall schematic view of the toothed pressing ring (shallow grooves are formed on the surface of the steel sleeve).

Reference numerals: 1. steel jacket; 2. a tooth pressing plate; 3. a tooth socket; 4. a first flow-blocking groove; 5. a second flow-blocking groove; 6. a threaded hole; 7. shallow-groove; 8. and a stator coil.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

A toothed pressing ring applied to motor stator lamination comprises a steel sleeve 1 and a toothed pressing plate 2, wherein the steel sleeve 1 is arranged in an annular mode, the toothed pressing plate 2 is coaxially sleeved in the steel sleeve 1, and a tooth groove 3 used for fixing a stator coil 8 is formed in the inner side of the toothed pressing plate 2. In the embodiment of the application, the steel sleeve 1 and the tooth pressing plate 2 are integrally formed, so that the whole stator pressing ring can be installed quickly and conveniently.

The bottom position of the groove 3 of the tooth socket of the tooth pressure plate 2 extends to the inner side wall of the steel sleeve 1 towards the direction of the steel sleeve 1 to form a plurality of first flow-blocking grooves 4, and the outer side wall of the steel sleeve 1 is provided with a second flow-blocking groove 5.

In order to prevent the slots 3 from scratching the stator coils 8, the first choke grooves 4 are arranged in a semicircular shape in cross section. In this embodiment, the cross section of the second flow-blocking groove 5 is trapezoidal.

Preferably, as shown in fig. 1-2, the first flow-resisting groove 4 and the second flow-resisting groove 5 are oppositely arranged at intervals. In practical applications, the current in the steel jacket 1 is actually an induced current, the induced current is substantially generated by the presence of an induced electromotive force, the induced electromotive force does not generate a current, and a large induced current is generated only when the steel jacket 1 has a current path or a large loop of an internally generated current. Because the induced current in the steel sleeve 1 has a skin effect, the first flow blocking groove 4 is matched with the second flow blocking groove 5, so that the current intensity in the steel sleeve 1 can be reduced, further the heating is reduced, and the loss is reduced.

The tooth grooves 3 on the tooth pressing plate 2 are unevenly arranged, and the stator coil is clamped by the tooth pressing plate 2, and the current in the steel sleeve 1 is reduced.

Further optimize, the degree of depth that first choke groove 4 extends towards steel bushing 1 direction is inhomogeneous the setting, because the degree of depth of first choke groove 4 is not unified for the electric current that flows along steel bushing 1 lateral wall surface can receive the hindrance, and then reduces the induced current size in the steel bushing 1, reduces the loss that generates heat.

In order to fix and tighten the stator pressing rings at the two ends of the stator by using the pull screw, the steel sleeve 1 is provided with a threaded hole 6 along the axial direction for the pull screw to pass through.

In order to facilitate the abutting of the outer side wall of the steel sleeve 1 and the motor stator shell, further, an annular step-shaped bulge is arranged on one side of the steel sleeve 1 around the axial direction of the steel sleeve.

As shown in fig. 3, in one embodiment, the steel jacket 1 has a plurality of shallow grooves 7 formed on the outer surface thereof in a direction perpendicular to the axial direction thereof, so that the magnitude of current in the vicinity of the surface of the steel jacket 1 can be effectively reduced, the amount of heat generated by the steel jacket 1 can be reduced, and the loss can be reduced.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides a be applied to motor stator and fold tooth clamping ring that takes that presses, includes steel bushing (1) and the coaxial endotheca that are the annular setting tooth clamp plate (2) in steel bushing (1), tooth's socket (3) that are used for fixed stator coil are seted up to the inboard of tooth clamp plate (2), its characterized in that:

the steel sleeve (1) and the tooth pressing plate (2) are integrally formed;

the bottom of the slotted groove of the toothed groove (3) of the toothed pressure plate (2) extends to the inner side wall of the steel sleeve (1) to form a plurality of first flow blocking grooves (4);

the outer side wall of the steel sleeve (1) is provided with a second flow-blocking groove (5);

the first flow-blocking grooves (4) and the second flow-blocking grooves (5) are arranged oppositely at intervals.

2. Toothed clamping ring for lamination of stators of electric machines according to claim 1, characterised in that the first flow-blocking groove (4) has a semicircular cross section.

3. Toothed clamping ring for lamination of stators of electric machines according to claim 1, characterised in that the second choke groove (5) has a trapezoidal section.

4. The toothed pressing ring applied to motor stator lamination according to claim 1 is characterized in that the steel sleeve (1) is provided with a threaded hole (6) along the axial direction for a pulling screw to pass through.

5. Toothed clamping ring for lamination of stators of electric machines according to claim 1, characterised in that the tooth spaces (3) on the toothed clamping plate (2) are arranged unevenly.

6. Toothed clamping ring for lamination of stators of electric machines according to claim 1, characterised in that one side of the steel sleeve (1) is provided with an annular step-like projection around its axial direction.

7. The toothed pressing ring applied to the lamination of the stator of the motor is characterized in that the depth of the first flow blocking groove (4) extending towards the steel sleeve (1) is uneven.

8. The toothed pressing ring applied to lamination of the stator of the motor is characterized in that a plurality of shallow grooves (7) are formed on the outer surface of the steel sleeve (1) in a direction perpendicular to the axial direction of the steel sleeve.