Open type stepping motor

Abstract

The utility model discloses an open type stepping motor, which comprises a fixed seat and a motor main body, the motor main body comprises a motor shell, a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are respectively arranged in the motor shell, the rotor assembly comprises a plastic part and a magnet, and the plastic part and the magnet form an integral structure through injection molding; the fixing seat is provided with a housing positioning groove corresponding to the motor housing. The bottom surface of the housing positioning groove is provided with a rotor positioning shaft which protrudes and extends. The rear end part of the motor shell is embedded and positioned in the shell positioning groove of the fixed seat; the core part of the plastic part is provided with a shaft hole which extends along the axis direction of the plastic part and is opened backwards, the rotor positioning shaft of the fixed seat is embedded into the shaft hole of the plastic part, and the rotor positioning shaft is in clearance fit with the plastic part. By means of the structural design, the LED lamp has the advantages of being novel in design, simple in structure and convenient and fast to install.

Description

Technical Field

[0001] The utility model relates to the technical field of stepping motors, in particular to an open stepping motor. Background Art

[0002] The utility model patent with the application number 202322590682.3 and the patent name of: A screw output type stepping motor discloses the following technical solutions. Specifically: A screw output type stepping motor includes a motor housing, a stator assembly, and a rotor assembly. A front fixing bracket is installed at the front end of the motor housing, and a rear cover plate is installed at the rear end of the motor housing; The rotor assembly includes a driving rotating shaft, a magnet, and a plastic part. The driving rotating shaft, the plastic part, and the magnet are injection molded into an integral structure; A front ball bearing is installed in the front bearing hole of the front fixing bracket, and a rear ball bearing is installed in the rear bearing hole of the rear cover plate. The front end of the driving rotating shaft is installed on the front fixing bracket through the front ball bearing, and the rear end of the driving rotating shaft is installed on the rear cover plate through the rear ball bearing.

[0003] For the above screw output type stepping motor, its front fixing bracket is equivalent to a fixed seat structure. During installation, the screw output type stepping motor is installed and fastened to the required components through the above fixed seat.

[0004] It should be noted that for the above screw output type stepping motor, it has the following defects. Specifically:

[0005] Defect 1: The front and rear ends of the rotor assembly need to be installed on the corresponding fixed seat and rear cover plate on the corresponding side through ball bearings. The bearing hole positions of the fixed seat and the rear cover plate corresponding to the ball bearings require high machining accuracy, and using ball bearings to support the rotor assembly will also increase the complexity of the structure. This makes the screw output type stepping motor have the deficiencies of complex structure and high processing cost.

[0006] Defect 2: The rotor assembly needs to be supported and installed by means of the rear cover plate. During the preparation process of the screw output type stepping motor, it is required to install the rear cover plate structure at the rear end of the motor housing. This will increase the preparation process on the one hand and also increase the complexity of the overall structure on the other hand. Utility Model Content

[0007] The purpose of the present utility model is to provide an open stepping motor for the deficiencies of the prior art. The open stepping motor is novel in design, simple in structure, and convenient and fast to install.

[0008] To achieve the above purpose, the present utility model is realized through the following technical solutions.

[0009] An open - type stepping motor includes a fixed seat and a motor main body. The motor main body includes a motor housing and a stator assembly and a rotor assembly respectively installed inside the motor housing. The rotor assembly includes a plastic part and a magnet, and the plastic part and the magnet are injection - molded into an integral structure;

[0010] The fixed seat is provided with a housing positioning groove corresponding to the motor housing, and a protruding and extending rotor positioning shaft is arranged on the bottom surface of the housing positioning groove; the rear end of the motor housing is embedded and positioned in the housing positioning groove of the fixed seat;

[0011] A shaft hole extending along the axial direction of the plastic part and opening backward is formed in the core of the plastic part, and the rotor positioning shaft of the fixed seat is inserted into the shaft hole of the plastic part, and the rotor positioning shaft and the plastic part are in clearance fit.

[0012] Wherein, the front end of the plastic part extends to the front side of the motor housing, and an output gear is installed at the front end of the plastic part.

[0013] Wherein, the output gear is a plastic gear, and the output gear and the plastic part are injection - molded into an integral structure.

[0014] Wherein, the motor housing includes a metal front shell and a metal rear shell, and the rear end of the metal rear shell is embedded and positioned in the housing positioning groove of the fixed seat;

[0015] The rear end of the metal front shell is welded to the front end of the metal rear shell, and the stator assembly is clamped and fixed between the metal front shell and the metal rear shell.

[0016] Wherein, the stator assembly includes a winding frame and a coil winding wound around the winding frame, and the winding frame is clamped and fixed between the metal front shell and the metal rear shell.

[0017] Compared with the prior art, the present utility model has the following beneficial effects. Specifically:

[0018] 1. During the installation process of the open - type stepping motor of the present utility model, the motor housing is installed and positioned through the housing positioning groove, and the plastic part of the rotor assembly is positioned through the rotor positioning shaft. The present utility model can achieve rapid installation;

[0019] 2. For the rotor assembly of the present utility model, it is positioned only through the rotor positioning shaft of the fixed seat; compared with the prior art in which the two ends are rotationally positioned and installed through bearings, the structure of the present utility model is simpler and the installation is more convenient and faster;

[0020] 3. Therefore, the open - type stepping motor of the present utility model has the advantages of novel design, simple structure, and convenient and fast installation. Description of the Drawings

[0021] The present utility model will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation to the present utility model.

[0022] Figure 1 It is a schematic structural diagram of the present utility model.

[0023] Figure 2 is Figure 1 exploded schematic diagram of.

[0024] Figure 3 It is a schematic cross-sectional view of the present utility model.

[0025] Figure 4 It is a schematic structural diagram of the motor main body of the present utility model.

[0026] Figure 5 is Figure 4 exploded schematic diagram of.

[0027] In Figures 1 to 5 includes:

[0028] 1 - fixed seat; 11 - housing positioning groove; 12 - rotor positioning shaft; 2 - motor main body; 3 - motor housing; 31 - metal front shell; 32 - metal rear shell; 4 - stator assembly; 41 - winding frame; 42 - coil winding; 5 - rotor assembly; 51 - plastic part; 511 - shaft hole; 52 - magnet; 53 - output gear. Specific embodiments

[0029] The present utility model will be described below in conjunction with specific embodiments.

[0030] Embodiment 1, as Figures 1 to 5 shown, an open - type stepper motor includes a fixed seat 1 and a motor main body 2. The motor main body 2 includes a motor housing 3 and a stator assembly 4 and a rotor assembly 5 respectively installed inside the motor housing 3. The rotor assembly 5 includes a plastic part 51 and a magnet 52, and the plastic part 51 and the magnet 52 are injection - molded into an integral structure.

[0031] Among them, as Figure 2 and Figure 3 shown, the fixed seat 1 is provided with a housing positioning groove 11 corresponding to the motor housing 3, and the bottom surface of the housing positioning groove 11 is provided with a protruding and extending rotor positioning shaft 12; the rear end of the motor housing 3 is embedded and positioned in the housing positioning groove 11 of the fixed seat 1. It should be explained that the rotor positioning shaft 12 of the first embodiment is an integral structure with the fixed seat 1.

[0032] Furthermore, as Figures 3 to 5As shown, a shaft hole 511 extending along the axis direction of the plastic part 51 and opening backward is provided in the core of the plastic part 51. The rotor positioning shaft 12 of the fixed seat 1 is inserted into the shaft hole 511 of the plastic part 51, and the rotor positioning shaft 12 is in clearance fit with the plastic part 51.

[0033] During the installation process of the open-type stepping motor in the first embodiment, the rear end of the motor housing 3 is aligned with and inserted into the housing positioning groove 11 of the fixed seat 1. The housing positioning groove 11 is designed with a profiling structure, and the housing positioning groove 11 can position the motor housing 3 to ensure that the motor housing 3 can be quickly and accurately installed on the fixed seat 1. Moreover, the plastic part 51 of the rotor assembly 5 is sleeved around the rotor positioning shaft 12 of the fixed seat 1 through its shaft hole 511, and the plastic part 51 is in clearance fit with the rotor positioning shaft 12. Therefore, during the installation process of the open-type stepping motor in the first embodiment, the motor housing 3 is installed and positioned through the housing positioning groove 11, and the plastic part 51 of the rotor assembly 5 is positioned through the rotor positioning shaft 12. The first embodiment can achieve quick installation.

[0034] It should be emphasized that for the rotor assembly 5 in the first embodiment, it is only positioned through the rotor positioning shaft 12 of the fixed seat 1. Compared with the prior art in which the two ends are rotationally positioned and installed through bearings, the structure of the first embodiment is simpler and the installation is more convenient and fast.

[0035] Based on the above situation, through the above structural design, the open-type stepping motor in the first embodiment has the advantages of novel design, simple structure, and convenient and fast installation.

[0036] Embodiment 2, as Figure 1 、 Figure 2 、 Figure 3 and Figure 5 shown, the difference between the second embodiment and the first embodiment is that the front end of the plastic part 51 extends to the front side of the motor housing 3, and an output gear 53 is installed at the front end of the plastic part 51.

[0037] It should be noted that the output gear 53 in the second embodiment can be designed with an integral structure or a split structure. For the output gear 53 with an integral structure design, the output gear 53 is a plastic gear, and the output gear 53 is injection-molded into an integral structure with the plastic part 51. For the output gear 53 with a split structure design, the output gear 53 can be installed at the front end of the plastic part 51 by means of snap-fitting.

[0038] The output gear 53 in the second embodiment is used as the power output structure of the rotor assembly 5. During operation, the rotor assembly 5 drives the output gear 53 to rotate synchronously, and the rotating output gear 53 drives the corresponding actuator to act.

[0039] Embodiment 3, as Figures 1 to 5 shown, the difference between this Embodiment 3 and Embodiment 1 is that: the motor housing 3 includes a metal front housing 31 and a metal rear housing 32, and the rear end of the metal rear housing 32 is embedded and positioned in the housing positioning groove 11 of the fixed seat 1.

[0040] Among them, the rear end of the metal front housing 31 is welded to the front end of the metal rear housing 32, and the stator assembly 4 is clamped and fixed between the metal front housing 31 and the metal rear housing 32.

[0041] Specifically, the stator assembly 4 includes a winding frame 41 and a coil winding 42 wound around the winding frame 41, and the winding frame 41 is clamped and fixed between the metal front housing 31 and the metal rear housing 32.

[0042] During operation, the coil winding 42 is energized to generate a magnetic field, and this magnetic field acts on the magnet 52 of the rotor assembly 5, thereby causing the magnet 52 to drive the plastic part 51 to rotate synchronously.

[0043] The above content is only the preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An open - type stepping motor, comprising a fixed seat (1) and a motor main body (2). The motor main body (2) includes a motor housing (3), a stator assembly (4) and a rotor assembly (5) respectively installed inside the motor housing (3). The rotor assembly (5) includes a plastic part (51) and a magnet (52), and the plastic part (51) and the magnet (52) are injection - molded into an integral structure. It is characterized in that: The fixed seat (1) is provided with a housing positioning groove (11) corresponding to the motor housing (3), and a protruding and extending rotor positioning shaft (12) is arranged on the bottom surface of the housing positioning groove (11). The rear end of the motor housing (3) is embedded and positioned in the housing positioning groove (11) of the fixed seat (1). A shaft hole (511) extending along the axis direction of the plastic part (51) and opening backward is formed in the core of the plastic part (51). The rotor positioning shaft (12) of the fixed seat (1) is inserted into the shaft hole (511) of the plastic part (51), and the rotor positioning shaft (12) and the plastic part (51) are in clearance fit.

2. An open - type stepping motor according to claim 1, characterized in that: The front end of the plastic part (51) extends to the front side of the motor housing (3), and an output gear (53) is installed at the front end of the plastic part (51).

3. An open - type stepper motor according to claim 2, characterized in that: The output gear (53) is a plastic gear, and the output gear (53) and the plastic part (51) are injection - molded into an integral structure.

4. An open - type stepper motor according to claim 1, characterized in that: The motor housing (3) includes a metal front shell (31) and a metal rear shell (32). The rear end of the metal rear shell (32) is embedded and positioned in the housing positioning groove (11) of the fixed seat (1). The rear end of the metal front shell (31) is welded to the front end of the metal rear shell (32), and the stator assembly (4) is clamped and fixed between the metal front shell (31) and the metal rear shell (32).

5. An open - type stepping motor according to claim 4, characterized in that: The stator assembly (4) includes a winding frame (41) and a coil winding (42) wound around the winding frame (41). The winding frame (41) is clamped and fixed between the metal front shell (31) and the metal rear shell (32).

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