Motor, telescopic supporting rod and automobile

Abstract

The utility model belongs to the technical field of automobiles, and discloses a motor, a telescopic supporting rod and an automobile. The bearing sleeves the motor shaft and is in clearance fit with the motor shaft; the positioning ring sleeves the motor shaft and is positioned on two sides of the bearing, a gap exists between the positioning ring and the bearing, and the positioning ring and the motor shaft rotate synchronously; the elastic piece is arranged between the positioning ring and the bearing, and the natural length of the elastic piece is larger than the interval between the positioning ring and the bearing. Due to the fact that the natural length of the elastic piece is larger than the interval between the positioning ring and the bearing, the elastic piece can press the positioning ring and the bearing, the motor shaft rotates to drive the positioning ring to rotate, the elastic piece is driven by the positioning ring to generate torsion, and due to the recovery performance of the elastic piece, elastic force and friction force are generated among the elastic piece, the positioning ring and the bearing. The friction force forms torque which prevents the positioning ring from rotating relative to the bearing, namely stable friction torque is generated, the friction torque can counteract the influence of external force, and the reliability of the keeping position of the trunk cover is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a motor, a telescopic support rod, and an automobile. Background Technology

[0002] With the trend of intelligentization in modern automobiles, electric tailgate support rods have become one of the core components for enhancing user experience. This device uses a motor-driven linkage mechanism or screw drive to achieve automatic lifting and positioning of the tailgate lid. It not only frees up the user's hands but also allows for precise control of opening and closing speed and stopping angle. It is especially suitable for contactless operation scenarios when carrying heavy objects and is increasingly widely used in new energy vehicles and high-end models.

[0003] Existing electric support rods rely on motor torque to directly maintain support. When the trunk lid is subjected to external vibrations (such as vehicle bumps or external collisions) or its own inertia, the motor and transmission system must withstand sudden loads, which can easily lead to fluctuations in support force. For example, if the motor suddenly loses power or stops during high-speed opening and closing, the trunk lid may shake or even fall back due to inertia, resulting in unstable support and affecting safety and reliability. Utility Model Content

[0004] The purpose of this invention is to provide a motor, a telescopic support rod, and an automobile to solve the problem in the prior art where the electric support rod relies on the motor torque to directly maintain the support force, resulting in an unstable support state and affecting the safety and reliability of the trunk lid.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a motor is provided, comprising:

[0007] Motor shaft;

[0008] A bearing, which is sleeved on the motor shaft and has a clearance fit with the motor shaft;

[0009] Positioning rings, of which there are two, are sleeved on the motor shaft and located on both sides of the bearing, with a gap between the positioning rings and the bearing, and the positioning rings rotate synchronously with the motor shaft;

[0010] An elastic element is disposed between the positioning ring and the bearing, and the natural length of the elastic element is greater than the interval between the positioning ring and the bearing.

[0011] As an optional technical solution for the motor, the elastic element is set as a spring, and the spring is sleeved on the motor shaft.

[0012] As an optional technical solution for the motor, the motor also includes a housing, which is configured as a cylinder, with through holes at both ends of the housing, and the motor shaft passing through the two through holes and having a clearance fit with the through holes.

[0013] As an optional technical solution for the motor, the end of the housing is provided with a receiving cavity, the receiving cavity is configured as a cylindrical cavity, and the bearing is fixed in the receiving cavity.

[0014] As an optional technical solution for the motor, one of the two positioning rings is located inside the housing, and the other is located outside the housing and abuts against the housing to restrict the axial movement of the motor shaft. The elastic element is disposed between the positioning ring located inside the housing and the bearing.

[0015] As an optional technical solution for the motor, the motor also includes a motor rotor, which is placed inside the housing and sleeved on the motor shaft, and the motor rotor can drive the motor shaft to rotate.

[0016] As an optional technical solution for the motor, the motor also includes a gasket, which is disposed between the positioning ring or the elastic element and the bearing.

[0017] As an optional technical solution for the motor, the motor shaft is interference-fitted with the inner hole of the positioning ring to fix the positioning ring and the motor shaft.

[0018] Secondly, a telescopic support rod is provided, including a motor, wherein the telescopic support rod is hollow inside and the motor is placed inside the telescopic support rod.

[0019] Thirdly, a car is provided, including a trunk lid and a telescopic support rod, the telescopic support rod being disposed on the trunk lid of the car.

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

[0021] This application discloses a motor, a telescopic support rod, and an automobile. The motor includes a motor shaft, bearings, positioning rings, and an elastic element. The bearings are sleeved on the motor shaft and have a clearance fit. Two positioning rings are sleeved on the motor shaft and located on either side of the bearings, with a gap between the positioning rings and the bearings. The positioning rings rotate synchronously with the motor shaft. The elastic element is located between the positioning rings and the bearings, and its natural length is greater than the gap between the positioning rings and the bearings. Because the natural length of the elastic element is greater than the gap between the positioning rings and the bearings, the elastic element can press the positioning rings and the bearings together. When the motor shaft rotates, it drives the positioning rings to rotate, causing the elastic element to twist. Due to the elastic element's self-restoring properties, elastic force and friction are generated between the elastic element, the positioning rings, and the bearings. The friction creates a torque that resists the rotation of the positioning rings relative to the bearings, thus generating a stable frictional torque. This frictional torque can counteract the influence of external forces, improving the reliability of the trunk lid's position retention. Attached Figure Description

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

[0023] Figure 1 This is a cross-sectional view of the motor provided in an embodiment of this utility model.

[0024] In the picture:

[0025] 10. Motor shaft; 20. Bearing; 30. Positioning ring; 40. Elastic element; 50. Housing; 60. Gasket; 70. Motor rotor. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Existing electric support rods rely on motor torque to directly maintain support. When the trunk lid is subjected to external vibrations such as vehicle bumps, external impacts, or its own inertia, the motor and transmission system must withstand sudden loads, which can easily lead to fluctuations in support force. For example, if the motor suddenly loses power or stops during high-speed opening and closing, the trunk lid may shake or even fall back due to inertia, resulting in unstable support and affecting safety and reliability.

[0031] To address the aforementioned problems, this embodiment provides a vehicle including a trunk lid and a telescopic support rod. The telescopic support rod is disposed on the trunk lid and includes a motor. The telescopic support rod is hollow inside, with the motor housed within it. It should be noted that the combination of the trunk lid and the telescopic support rod is prior art and will not be described further here.

[0032] Among them, see Figure 1The motor includes a motor shaft 10, a bearing 20, a positioning ring 30, and an elastic element 40. The bearing 20 is sleeved on the motor shaft 10 and has a clearance fit with the motor shaft 10. There are two positioning rings 30, which are sleeved on the motor shaft 10 and located on both sides of the bearing 20. There is a gap between the positioning rings 30 and the bearing 20. The positioning rings 30 and the motor shaft 10 rotate synchronously. The elastic element 40 is located between the positioning rings 30 and the bearing 20. The natural length of the elastic element 40 is greater than the gap between the positioning rings 30 and the bearing 20. Since the natural length of the elastic element 40 is greater than the interval between the positioning ring 30 and the bearing 20, the elastic element 40 can press the positioning ring 30 and the bearing 20 together. When the motor shaft 10 rotates, it drives the positioning ring 30 to rotate. The elastic element 40 is driven by the positioning ring 30 to generate torsion. Due to the self-restoring property of the elastic element 40, elastic force and friction are generated between the elastic element 40, the positioning ring 30 and the bearing 20. The friction force forms a torque that hinders the rotation of the positioning ring 30 relative to the bearing 20, that is, a stable friction torque is generated. The friction torque can offset the influence of external force and improve the reliability of the trunk lid in maintaining its position.

[0033] In this embodiment, the elastic element 40 is configured as a spring, which is sleeved on the motor shaft 10. In other embodiments, the elastic element 40 may also be configured as an elastic washer. The material properties of the elastic element 40 give it a tendency to return to its original shape (Hooke's Law), thereby applying a continuous normal pressure F to the positioning ring 30 and the bearing 20. N (Elastic force), and generates tangential frictional force F between the contact surfaces. f Frictional force F f Magnitude and normal pressure F N Related to the coefficient of friction μ of the contact surface: F f =μ*F N Friction acts on the contact radius of the locating ring 30 and the bearing 20, forming a frictional torque T that opposes relative rotation: T = F f *r, where r is the distance from the contact point to the motor shaft 10.

[0034] Furthermore, the motor also includes a housing 50, which is cylindrical. Through holes are provided at both ends of the housing 50, and the motor shaft 10 passes through both through holes and is clearance-fitted with them. Specifically, a receiving cavity is provided at the end of the housing 50, which is cylindrical, and the bearing 20 is fixed within the receiving cavity. In this embodiment, the bearing 20 and the receiving cavity can be fixed using adhesive bonding or set screws. In this embodiment, two receiving cavities are provided corresponding to the bearing 20, located at both ends of the housing 50.

[0035] Furthermore, one of the two positioning rings 30 is located inside the housing 50, and the other is located outside the housing 50 and abuts against the housing 50 to restrict the axial movement of the motor shaft 10. An elastic element 40 is disposed between the positioning ring 30 located inside the housing 50 and the bearing 20. In this embodiment, the motor also includes a gasket 60, which is disposed between the positioning ring 30 or the elastic element 40 and the bearing 20. Specifically, the gasket 60 can be ring-shaped and made of polytetrafluoroethylene (PTFE). PTFE has a low coefficient of friction (0.05-0.1), excellent self-lubricating properties, and can significantly reduce wear on the contact surface between the positioning ring 30 and the bearing 20; PTFE has strong wear and corrosion resistance and is suitable for various media such as oil, water, and chemical solvents; PTFE is a non-metallic material with moderate elasticity, which can slightly buffer vibrations and reduce friction noise.

[0036] In this embodiment, the motor shaft 10 and the inner hole of the positioning ring 30 are interference-fitted to fix the positioning ring 30 and the motor shaft 10. In other embodiments, a threaded hole can be provided on the peripheral wall of the positioning ring 30, and a fastener is screwed into the threaded hole and abuts against the peripheral wall of the motor shaft 10 to fix the positioning ring 30 and the motor shaft 10. In other embodiments, the positioning ring 30 and the motor shaft 10 can be glued together.

[0037] Furthermore, the motor also includes a motor rotor 70, which is housed inside the housing 50 and sleeved on the motor shaft 10. The motor rotor 70 can drive the motor shaft 10 to rotate. The motor rotor 70 converts the rotating magnetic field energy generated by the stator into its own mechanical rotational energy and outputs mechanical power through electromagnetic induction or electromagnetic force. It should be noted that the motor rotor 70 in the motor is existing technology, and its structure and working principle will not be described here.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electric machine characterized in that, include: Motor shaft (10); A bearing (20) is sleeved on the motor shaft (10) and has a clearance fit with the motor shaft (10); Positioning rings (30), there are two positioning rings (30), which are sleeved on the motor shaft (10) and located on both sides of the bearing (20). There is a gap between the positioning rings (30) and the bearing (20). The positioning rings (30) and the motor shaft (10) rotate synchronously. An elastic element (40) is disposed between the positioning ring (30) and the bearing (20), and the natural length of the elastic element (40) is greater than the interval between the positioning ring (30) and the bearing (20).

2. The electric machine of claim 1, wherein, The elastic element (40) is configured as a spring, and the spring is sleeved on the motor shaft (10).

3. The electric machine of claim 1, wherein, The motor also includes a housing (50), which is cylindrical and has through holes at both ends. The motor shaft (10) passes through the two through holes and is clearance-fitted with the through holes.

4. The electric machine of claim 3, wherein, The housing (50) has a receiving cavity at its end, which is a cylindrical cavity, and the bearing (20) is fixed inside the receiving cavity.

5. The electric machine of claim 3, wherein, One of the two positioning rings (30) is located inside the housing (50), and the other is located outside the housing (50) and abuts against the housing (50) to restrict the axial movement of the motor shaft (10). The elastic element (40) is disposed between the positioning ring (30) and the bearing (20) located inside the housing (50).

6. The electric machine of claim 3, wherein, The motor also includes a motor rotor (70), which is placed inside the housing (50) and sleeved on the motor shaft (10). The motor rotor (70) can drive the motor shaft (10) to rotate.

7. The electric machine of any of claims 1-6, wherein, The motor also includes a gasket (60), which is disposed between the positioning ring (30) or the elastic element (40) and the bearing (20).

8. The electric machine of any of claims 1-6, wherein, The motor shaft (10) is interference-fitted with the inner hole of the positioning ring (30) to fix the positioning ring (30) and the motor shaft (10).

9. A telescoping support pole characterized by, Includes the motor as described in any one of claims 1-8, wherein the telescopic support rod is hollow inside, and the motor is placed inside the telescopic support rod.

10. An automobile characterized by comprising: It includes a trunk lid and a telescopic support rod as described in claim 9, the telescopic support rod being disposed on the trunk lid of the vehicle.

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