Centering thin stepping motor

Abstract

The utility model relates to the technical field of stepping motors, in particular to a centering thin stepping motor, which comprises a stator assembly, a rotor assembly, a front end cover, a first bearing, a front cover plate, a second bearing, a rear end cover and a rear cover plate, the front cover plate is clamped in the front end cover, the first bearing is clamped in the front cover plate, the rear end cover is arranged at the bottom of the stator assembly, the rear cover plate is clamped in the rear end cover, the second bearing is clamped in the rear cover plate, and the centering thin stepping motor rotor surface bearing is installed in a bearing chamber on the inner side of the front end cover and the inner side of the rear end cover. The stator, the front end cover and the rear end cover are assembled in a centering mode and then are fixed through screws, the end covers and the cover plate are bonded through metal fixing glue, and therefore the strength, the assembly precision and the operation stability of the motor are guaranteed, and the performance of the motor is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stepping motor technical field especially relates to a kind of centring thin type stepping motor. BACKGROUND

[0002] Stepping motor is the discrete value control motor that electric impulse excitation signal is converted into corresponding angular displacement or linear displacement, and this motor moves a step whenever inputting an electric pulse, so it is also called pulse motor.

[0003] The structure of ordinary stepping motor is not compact enough, which leads to its large size, and it is inconvenient to install in a narrow space, and its sealing effect is not good, in order to ensure the smooth operation of the motor, the stator and the front and rear end covers need to be installed in the center. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of centring thin type stepping motor in view of the defects in the prior art.

[0005] The utility model is realized by the following technical solutions:

[0006] A kind of centring thin type stepping motor, including stator assembly, rotor assembly, front end cover, first bearing, front cover plate, second bearing, rear end cover and rear cover plate, the rotor assembly is clamped in the middle part of the stator assembly, the front end cover is set in stator assembly top, the front cover plate is clamped in the inside of front end cover, the first bearing is clamped in the inside of front cover plate, the rear end cover is set in stator assembly bottom, the rear cover plate is clamped in the inside of rear end cover, the second bearing is clamped in the inside of rear cover plate, the stator assembly includes stator and insulation framework, the insulation framework is clamped in the inside of stator top and bottom, the rotor assembly includes rotor shaft, magnetic steel and rotor lamination, the magnetic steel is fixedly set on the outside of the rotor shaft, and the rotor lamination is set on the top and bottom of the magnetic steel.

[0007] In a preferred embodiment of the utility model, the bottom of the insulation framework is provided with a cover shell matched with the inside winding core of the stator, and the surface of the inside core of the stator is provided with a stator winding;

[0008] The cover shell provided at the bottom of the insulation framework is effectively matched with the surface of the inside winding core of the stator, so as to ensure the insulation effect.

[0009] In a preferred embodiment of the utility model, the first bearing and the second bearing are respectively sleeved on the top and bottom of the rotor shaft, the inside of the top of the front cover plate is provided with a bearing chamber matched with the first bearing, and the inside of the bottom of the rear cover plate is provided with a bearing chamber matched with the second bearing.

[0010] The bearing chambers opened in the inside of the front cover plate and the rear cover plate effectively provide installation space for the first bearing and the second bearing, so as to reduce the overall size of the motor.

[0011] In the preferable embodiment of the utility model, the stator is provided with screw mounting holes on the surface of the front end cover and the rear end cover, and is assembled with the stator by high-precision cylindrical mandrels;

[0012] The screw ensures the overall connection effect of the stator and the front and rear end covers, and after the front end cover and the rear end cover are installed with the stator by centering, the installation precision is effectively improved.

[0013] In the preferable embodiment of the utility model, the front end cover and the front cover plate and the rear end cover and the rear cover plate are bonded by metal holding glue, thereby improving the overall strength.

[0014] The utility model discloses the beneficial effects are:

[0015] The surface bearing of the centering thin type stepping motor rotor is installed in the bearing chamber of the inner side of the front and rear end covers, thereby effectively reducing the overall volume of the motor, the stator is fixed by screw after being assembled with the front and rear end covers by centering, and the end cover and the cover plate are also bonded by metal holding glue, thereby ensuring the motor strength, assembly precision, operation stability, and ensuring the motor performance. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic view of the centering thin type stepping motor of the utility model;

[0017] Figure 2 It is the internal structure schematic view of the stator of the centering thin type stepping motor of the utility model;

[0018] Figure 3 It is the overall explosion structure schematic view of the motor of the centering thin type stepping motor of the utility model;

[0019] Figure 4 It is the motor centering assembly structure schematic view of the centering thin type stepping motor of the utility model.

[0020] In the drawing: 1, stator assembly;11, stator;12, insulating framework;2, rotor assembly;21, rotor shaft;22, magnetic steel;23, rotor lamination;3, front end cover;4, first bearing;5, front cover plate;6, second bearing;7, rear end cover;8, rear cover plate. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described in detail below with reference to the drawings, so that the advantages and features of the utility model can be more easily understood by the people in the field, and thus the protection scope of the utility model can be more clearly and explicitly defined. The directions mentioned in the utility model, such as "up", "down", "front", "back", "left", "right", "top" and "bottom", are only the directions of the attached drawings. Therefore, the directions used are used to explain and understand the utility model, not to limit the utility model.

[0022] As shown in Figures 1-4 A kind of centering thin type stepping motor, including stator assembly 1, rotor assembly 2, front end cover 3, first bearing 4, front cover plate 5, second bearing 6, rear end cover 7 and rear cover plate 8, rotor assembly 2 is clamped in the middle of stator assembly 1, front end cover 3 is set to the top of stator assembly 1, front cover plate 5 is clamped in the inside of front end cover 3, first bearing 4 is clamped in the inside of front cover plate 5, rear end cover 7 is set to the bottom of stator assembly 1, rear cover plate 8 is clamped in the inside of rear end cover 7, second bearing 6 is clamped in the inside of rear cover plate 8, stator assembly 1 includes stator 11 and insulating framework 12, insulating framework 12 is clamped in the top and bottom inside of stator 11, rotor assembly 2 includes rotor shaft 21, magnetic steel 22 and rotor laminate 23, magnetic steel 22 is fixedly set to the outside of rotor shaft 21, and rotor laminate 23 is set to the top and bottom of magnetic steel 22.

[0023] Specifically, the bottom of the insulating framework 12 is provided with a cover shell cooperating with the inside winding core of the stator 11, the inside surface of the core of the stator 11 is provided with a stator winding, the first bearing 4 and the second bearing 6 are respectively sleeved on the top and bottom of the rotor shaft 21, the inside top of the front cover plate 5 is provided with a bearing chamber cooperating with the first bearing 4, the inside bottom of the rear cover plate 8 is provided with a bearing chamber cooperating with the second bearing 6, the surface of the stator 11, the front end cover 3 and the rear end cover 7 is provided with a screw mounting hole, the stator 11 is assembled in the center by a high-precision cylindrical core rod, the front end cover 3 and the front cover plate 5 and the rear end cover 7 and the rear cover plate 8 are bonded by a metal holding glue, and the overall strength is improved.

[0024] In the embodiment, the stator assembly 1 of the motor includes the stator 11 and the insulating framework 12, the inside of the stator 11 is provided with a core, and the bottom of the insulating framework 12 is provided with a cover shell cooperating with the core. After clamping the insulating framework 12 inside the stator 11, the two insulating frameworks 12 clamped on the top and bottom effectively wrap the outside of the core, thereby ensuring the working reliability of the stator winding.

[0025] Further, the rotor assembly 2 comprises a rotor shaft 21, a magnetic steel 22 and a rotor laminate 23, the magnetic steel 22 is arranged outside the rotor shaft 21, the rotor laminate 23 is arranged on the top and bottom of the magnetic steel 22 respectively, then the first bearing 4 and the second bearing 6 are arranged on the top and bottom of the motor rotor shaft 21 respectively, during assembly, the front end cover 3, the front cover plate 5, the rear end cover 7 and the rear cover plate 8 are fixed by metal holding glue, then the front end cover 3 and the rear end cover 7 are arranged on the top and bottom of the stator 11 respectively, the inner sides of the front cover plate 5 and the rear cover plate 8 are provided with bearing chambers, the bearing mounting space is provided while the overall volume is reduced, during assembly, the screw mounting holes on the front end cover 3 and the rear end cover 7 are coaxially assembled with the stator 11 through a high-precision cylindrical mandrel, and then the coaxial assembly is locked and fixed by screws, so that the assembly precision is higher and the motor performance is more stable.

[0026] It should be noted that the parts not involved in the present application are the same as or can be realized by the prior art; various drives in the present application can be realized by cooperating corresponding power structures such as cylinders, oil cylinders, electric cylinders, motors, connecting rods, guide rods, etc., and are not limited to the description in the specification and the structure in the drawings.

[0027] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting", "provided with" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A centrifugal thin stepping motor, comprising a stator assembly (1), a rotor assembly (2), a front end cover (3), a first bearing (4), a front cover plate (5), a second bearing (6), a rear end cover (7) and a rear cover plate (8), characterized in that: The rotor assembly (2) is clamped in the middle of the stator assembly (1), the front end cover (3) is arranged at the top of the stator assembly (1), the front cover plate (5) is clamped inside the front end cover (3), the first bearing (4) is clamped inside the front cover plate (5), the rear end cover (7) is arranged at the bottom of the stator assembly (1), the rear cover plate (8) is clamped inside the rear end cover (7), and the second bearing (6) is clamped inside the rear cover plate (8); The stator assembly (1) comprises a stator (11) and an insulating frame (12), wherein the insulating frame (12) is clamped on the inner sides of the top and bottom of the stator (11); The rotor assembly (2) comprises a rotor shaft (21), a magnetic steel (22) and a rotor lamination (23), wherein the magnetic steel (22) is fixedly arranged on the outside of the rotor shaft (21), and the rotor lamination (23) is arranged on the top and bottom of the magnetic steel (22).

2. The centrifugal thin stepping motor according to claim 1, characterized in that: The bottom of the insulating frame (12) is provided with a covering shell that matches the inner winding core of the stator (11), and the surface of the inner core of the stator (11) is provided with a stator winding.

3. The centrifugal thin stepping motor according to claim 1, characterized in that: The first bearing (4) and the second bearing (6) are respectively sleeved on the top and bottom of the rotor shaft (21); a bearing chamber for matching with the first bearing (4) is provided on the inner side of the top of the front cover plate (5); and a bearing chamber for matching with the second bearing (6) is provided on the inner side of the bottom of the rear cover plate (8).

4. The centrifugal thin stepping motor according to claim 1, characterized in that: The stator (11), the front end cover (3) and the rear end cover (7) are provided with screw mounting holes on their surfaces, and are assembled with the stator (11) by means of a high-precision cylindrical core rod.

5. The centrifugal thin stepping motor according to claim 1, characterized in that: The front end cover (3) and the front cover plate (5) as well as the rear end cover (7) and the rear cover plate (8) are bonded together by metal retaining glue to improve overall strength.

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