Support rod motor

Abstract

The utility model provides a stay bar motor, and relates to the technical field of motors. One end of the casing is an open end, a stator magnet is fixed on the inner wall of the casing, a rotor assembly is arranged in the casing, an end cover covers the open end of the casing in a buckling manner, the rotor assembly comprises a rotating shaft rotationally connected with the casing and the end cover, and a limiting structure is arranged between the rotating shaft and the end cover and between the rotating shaft and the casing. The limiting structure comprises a first limiting piece connected with the machine shell or the end cover and a second limiting piece arranged on the rotating shaft, the rotating shaft between the first limiting piece and the second limiting piece is sleeved with two annular mesons, and the rotating shaft between the two mesons is sleeved with an annular wave-shaped elastic piece. According to the utility model, the tail door of the automobile can be suspended and a brake structure is not arranged.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a stay rod motor. BACKGROUND

[0002] Automobile electric tail door, can be opened or closed through the way of remote control or press button on the tail door, electric tail door is driven by electric stay rod. Electric stay rod is usually composed of motor, speed reducer, screw rod, nut sleeve and spring, motor is connected with speed reducer, drives screw rod to make spiral motion in nut, thereby driving the opening and closing of tail door.

[0003] In prior art, in order to make automobile tail door can hover, motor stay rod is provided with brake structure, namely electromagnetic power-off brake, if can be realized in the condition of not setting brake structure and motor shutdown, motor still has certain rotation resistance and can make automobile tail door hover, then will make electric stay rod structure simplify, volume can be further reduced, thereby reducing cost. UTILITY MODEL CONTENTS

[0004] The utility model aims at developing a stay rod motor that can make automobile tail door hover and is not provided with brake structure.

[0005] The utility model realizes the following technical scheme:

[0006] A stay rod motor, comprising:

[0007] A casing with one end being an open end;

[0008] A stator magnet fixed to the inner wall of the casing;

[0009] A rotor assembly arranged in the casing;

[0010] An end cover buckled and closed to the open end of the casing;

[0011] The rotor assembly comprises a rotating shaft rotatably connected with the casing and the end cover, a limiting structure is arranged between the rotating shaft and the end cover and the casing, the limiting structure comprises a first limiting piece connected with the casing or the end cover and a second limiting piece arranged on the rotating shaft, two annular mesons are sleeved on the rotating shaft between the first limiting piece and the second limiting piece, and an annular wave-shaped elastic sheet is sleeved on the rotating shaft between the two mesons.

[0012] Optionally, the wave-shaped elastic sheet is annular and wave-shaped in the circumferential direction.

[0013] Optionally, the first limiting piece comprises a first bearing connected with the casing and sleeved on the rotating shaft, and the second limiting piece comprises a first positioning ring and a second positioning ring sleeved on the rotating shaft on both sides of the first bearing.

[0014] Optionally, the second positioning ring is located on the side of the rotating shaft closer to the end cover, and the two spacers are disposed between the second positioning ring and the first bearing.

[0015] Optionally, the material of the meson is nylon 6.

[0016] Optionally, a rotor body and a commutator are sleeved on the rotating shaft. The rotor body is located inside the stator magnet, and the commutator is located on the side of the rotor body near the open end of the housing. The rotor winding is wound on the rotor body and electrically connected to the commutator.

[0017] Optionally, the rotor body includes multiple chips stacked axially along the rotation axis, and the chips are made of SPCC.

[0018] Optionally, the end cover is provided with a brush assembly arranged on the outside of the commutator. The brush assembly includes a carbon brush that contacts the commutator, and the surface of the carbon brush that contacts the commutator is an arc surface.

[0019] Optionally, the end cap is provided with a second bearing sleeved on the rotating shaft, and the bottom of the end cap is provided with a magnetic ring sleeved around the rotating shaft.

[0020] The beneficial effects of this utility model are:

[0021] This invention increases the friction between the ferrite core and the first bearing by setting a wave spring and making the contact surface between the carbon brush and the commutator an arc surface, thereby increasing the contact area between the carbon brush and the commutator and increasing the mechanical friction of the rotating shaft. The chip is made of SPCC material, which increases the electromagnetic resistance. Through these means, the motor has a holding force, which allows the motor to have a certain rotational resistance when it stops, so that the electric strut stops extending and retracting, and the tailgate can be suspended. Furthermore, the motor does not have a braking structure, which simplifies the structure of the electric strut and allows for further reduction in size, thereby reducing costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of the present invention;

[0024] Figure 2 This is an exploded view of the present invention from another perspective;

[0025] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0026] Reference numerals: 1, housing; 2, stator magnet; 3, rotating shaft; 4, first bearing; 5, second positioning ring; 6, first positioning ring; 7, chip; 8, end cover; 9, commutator; 10, carbon brush; 11, magnetic ring; 12, meson; 13, wave-shaped elastic sheet. DETAILED DESCRIPTION

[0027] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0028] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present invention.

[0029] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0030] The embodiments of the present utility model will be described in detail below in conjunction with the drawings.

[0031] As Figures 1-3 shown, the utility model discloses a stay rod motor, including the housing 1, the fixed stator magnet 2 of housing 1 inner wall, the rotor assembly is still provided with in the housing 1, the housing 1 open end buckling pressure cover has the end cover 8.

[0032] The rotor assembly includes rotating shaft 3, and the rotating shaft 3 extends out of the housing 1 and the end cover 8 at both ends, respectively. The end cover 8 bottom is provided with a magnetic ring 11 sleeved on the outer periphery of the rotating shaft. The rotating shaft 3 extending out of the end cover 8 and the housing 1 is provided with a bearing chamber, the bearing chamber in the housing 1 is provided with a first bearing 4 sleeved on the rotating shaft 3, and the bearing chamber in the end cover 8 is provided with a second bearing sleeved on the rotating shaft 3.

[0033] The rotating shaft 3 on the two sides of the first bearing 4 is sleeved with a first positioning ring 6 and a second positioning ring 5, and the second positioning ring 5 is located on the side close to the end cover 8. Two mesons 12 are sleeved on the rotating shaft 3 between the second positioning ring 5 and the first bearing 4, the mesons 12 have wear resistance and damping effect, a wave-shaped elastic sheet 13 is sleeved on the rotating shaft 3 between the two mesons 12, the meson 12 is a circular ring, and the material of the meson 12 is nylon 6; in addition, the meson 12 can also be a non-metal material such as plastic or rubber. The wave-shaped elastic sheet 13 is annular, and the circumferential direction of the wave-shaped elastic sheet 13 is in a wave shape.

[0034] The rotating shaft 3 is sleeved with a rotor body and a commutator 9, the rotor body is located on the inner side of the stator magnet 2, the commutator 9 is located on the side of the rotor body close to the open end of the shell 1, and a rotor winding (not shown in the figure) is arranged on the rotor body and is electrically connected with the commutator 9.

[0035] The rotor body comprises a plurality of core pieces 7 stacked along the axial direction of the rotating shaft 3, the material of the core piece 7 is SPCC (cold-rolled carbon steel sheet), and the eddy current and the electromagnetic resistance are increased.

[0036] The end cover 8 is provided with two groups of brush assemblies arranged on the outer side of the commutator 9, the brush assembly comprises a carbon brush 10 in contact with the commutator 9, and the surface of the carbon brush 10 in contact with the commutator 9 is a circular arc surface with a shape matching relationship.

[0037] The two mesons 12 and the wave-shaped elastic sheet 13 can also be arranged at other limiting structures of the rotating shaft 3, for example, the positioning rings can also be arranged on the rotating shaft 3 on the two sides of the second bearing in the end cover 8, the two mesons 12 are arranged between the positioning rings and the second bearing, and the wave-shaped elastic sheet 13 is arranged between the two mesons.

[0038] The utility model discloses a wave-shaped elastic sheet 13 is arranged, and the surface of the carbon brush 10 in contact with the commutator 9 is a circular arc surface, the friction between the meson 12 and the first bearing 4 is increased, the contact area of the carbon brush 10 and the commutator 9 is increased, the mechanical friction of the rotating shaft 3 is increased, the material of the core piece 7 is SPCC, the electromagnetic resistance is increased, through the above-mentioned means, the motor has the holding force, can make the motor when parking have certain rotation resistance, make the electric supporting rod stop telescoping, the tail door can be suspended, and the motor is not provided with the brake structure, makes the electric supporting rod structure simple, and the volume can be further reduced, thereby reducing the cost.

[0039] The above-mentioned embodiment is only a preferred embodiment of the utility model, and is not a limitation on the technical scheme of the utility model. As long as the technical scheme can be realized on the basis of the above-mentioned embodiment without creative labor, it should be regarded as falling within the protection scope of the utility model patent.

Claims

1. A strut motor, characterized by The utility model relates to a motor, including: A casing with an open end; A stator magnet fixed to the inner wall of the casing; A rotor assembly arranged in the casing; An end cover screwed to the open end of the casing; The rotor assembly includes a rotating shaft rotatably connected to the casing and the end cover, and a limiting structure is arranged between the rotating shaft and the end cover and the casing, the limiting structure includes a first limiting member connected to the casing or the end cover and a second limiting member arranged on the rotating shaft, two annular mesons are sleeved on the rotating shaft between the first limiting member and the second limiting member, and an annular wave-shaped spring is sleeved on the rotating shaft between the two mesons.

2. The strut motor of claim 1, wherein, The wave-shaped spring is annular and wavy in the circumferential direction.

3. The strut motor of claim 1, wherein, The first limiting member includes a first bearing connected to the casing and sleeved on the rotating shaft, and the second limiting member includes a first positioning ring and a second positioning ring sleeved on the rotating shaft on both sides of the first bearing.

4. The strut motor of claim 3, wherein, The second positioning ring is located on the side of the rotating shaft close to the end cover, and the two mesons are arranged between the second positioning ring and the first bearing.

5. The strut motor of claim 1, wherein, The material of the meson is nylon 6.

6. The strut motor of any one of claims 1-5, wherein, A rotor body and a commutator are sleeved on the rotating shaft, the rotor body is located inside the stator magnet, the commutator is located on the side of the rotor body close to the open end of the casing, and the rotor winding is wound on the rotor body and electrically connected to the commutator.

7. The strut motor of claim 6, wherein, The rotor body includes a plurality of chips stacked in the axial direction of the rotating shaft, and the material of the chip is SPCC.

8. The strut motor of claim 6, wherein, A brush assembly is arranged on the end cover outside the commutator, the brush assembly includes a carbon brush in contact with the commutator, and the surface of the carbon brush in contact with the commutator is a circular arc surface.

9. The strut motor of claim 1, wherein, A second bearing is sleeved on the rotating shaft on the end cover, and a magnetic ring is arranged on the periphery of the rotating shaft at the bottom of the end cover.

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