Adjusting motors and automobiles

Abstract

This application discloses a regulating motor and an automobile. The regulating motor includes: a gearbox, the gearbox including a gearbox body and a gearbox cover; a bearing, the bearing being mounted between the gearbox body and the gearbox cover; and a screw, the end of the screw being supported in the gearbox by the bearing. The regulating motor according to this application can reduce the noise of the regulating motor.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically, to a regulating motor and an automobile having such a regulating motor. Background Technology

[0002] With the rapid development of the automotive industry, consumers' demands for the driving and riding experience are constantly increasing. During long drives or rides, uncomfortable seat angles can easily lead to fatigue, back pain, and affect the riding experience and even driving safety. In cars equipped with seat adjustment motors, users can precisely adjust the seat position or angle with simple operations.

[0003] There is a seat adjustment motor in which a screw is fixed at a bearing position between the gearbox body and the gearbox cover. At the bearing position, there are gaps between the screw and the gearbox body and between the screw and the gearbox cover, respectively, to ensure that the screw has sufficient room to move and rotates smoothly.

[0004] Because maintaining high precision in the roundness of the gearbox body and gearbox cover is difficult, the screw is prone to contact with the gearbox body or gearbox cover during operation, resulting in noise. Furthermore, the clearance between the screw and the gearbox body, as well as between the screw and the gearbox cover, is difficult to control precisely, making it challenging to maintain consistency during mass production. Utility Model Content

[0005] The main technical problem this application aims to solve is how to reduce the noise of the regulating motor.

[0006] To solve the above-mentioned technical problems, this application provides an adjusting motor, which includes:

[0007] The gearbox includes a gearbox body and a gearbox cover;

[0008] Bearing, the bearing being mounted between the gearbox body and the gearbox cover; and

[0009] A screw, the end of which is supported in the gearbox by the bearing.

[0010] According to one aspect of this application, an adjusting motor includes a friction pad disposed in the gearbox, and a screw includes a shoulder, the friction pad abutting against the shoulder for axially supporting the screw.

[0011] According to one aspect of this application, the adjusting motor includes two friction pads that support the screw in two opposite directions.

[0012] According to one aspect of this application, an adjusting motor is provided with a spring between the friction pad and the gearbox for axially supporting the friction pad on the screw.

[0013] According to one aspect of this application, the regulating motor includes a worm gear and a nut, with a screw gear engaging with both the worm gear and the nut, and power from the regulating motor being transmitted sequentially through the worm gear, the screw gear, and the nut.

[0014] According to one aspect of this application, the adjusting motor includes a screw comprising a worm gear and a lead screw, the worm gear being fixedly connected to the lead screw, the worm cooperating with the worm gear, and the lead screw cooperating with the nut.

[0015] According to one aspect of this application, the adjusting motor is made of metal, the worm gear is made of plastic, and the lead screw and the worm gear are manufactured by insert injection molding.

[0016] According to one aspect of this application, the gearbox cover is fastened to the gearbox body by a threaded connection.

[0017] According to one aspect of this application, the adjusting motor is provided with a ball bearing or an angular contact ball bearing.

[0018] On the other hand, this application provides an automobile that includes the regulating motor described in any of the preceding aspects.

[0019] According to the technical solution of this application, a bearing is provided between the gearbox body and the gearbox cover, and the end of the screw is supported by the bearing on the gearbox, which can reduce the noise generated during the operation of the screw. Attached Figure Description

[0020] The disclosure of this application is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Wherein:

[0021] Figure 1 An exploded view of an adjusting motor according to one embodiment of this application is schematically shown; and

[0022] Figure 2 Schematic representation Figure 1 A cross-sectional view of the regulating motor in its assembled state. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of this application.

[0024] Please see Figures 1 to 2 As shown, a regulating motor 100 according to a specific embodiment of this application includes a gearbox 1, a bearing 2, and a screw 3. The gearbox 1 includes a gearbox body 11 and a gearbox cover 12. The bearing 2 is mounted between the gearbox body 11 and the gearbox cover 12. The end of the screw 3 is supported on the gearbox 1 by the bearing 2, thereby allowing the screw 3 to rotate relative to the gearbox 1 about its own axis and output power from the regulating motor 100, and the end of the screw 3 is radially limited by the bearing 2. The fit between the screw 3 and the bearing 2 is, for example, an interference fit. The screw 3 can be supported on the gearbox 1 by one bearing 2, or the screw 3 can be supported on the gearbox 1 by multiple bearings.

[0025] The bearing 2 is a part independent of the gearbox body 11 and the gearbox cover 12. The bearing 2 includes an inner ring, an outer ring, and rolling elements located between the inner ring and the outer ring.

[0026] The adjusting motor 100 can be used to adjust parameters such as the height, fore-aft position, and tilt angle of actuators, such as the steering column or seat. The gearbox body 11 and the gearbox cover 12 can be made of plastic, for example, manufactured by injection molding. The gearbox body 11 and the gearbox cover 12 can have a clearance fit, for example, a clearance between 0.08 and 0.1 mm.

[0027] The bearing 2 can be a ball bearing or an angular contact ball bearing. When the bearing 2 is a ball bearing, an axial stop, such as a friction pad, can be additionally provided to restrict the screw 3 axially (parallel to the screw's axis). When the bearing 2 is an angular contact ball bearing, two opposing angular contact ball bearings can be arranged around the screw 3 to restrict the screw 3 in two opposite axial directions.

[0028] In the technical solution according to this application, a bearing 2 is installed between the gearbox body 11 and the gearbox cover 12, and the end of the screw 3 is supported on the gearbox 1 by the bearing 2. Thus, the rotation of the screw 3 does not need to rely on direct contact with the gearbox body 11 and the gearbox cover 12 themselves. Since the roundness of the gearbox body 11 and the gearbox cover 12 made of plastic is not uniform, in this way, the screw 3 is not likely to directly contact the uneven roundness of the gearbox body 11 or the gearbox cover 12, thereby reducing the noise generated by the regulating motor 100 during operation, increasing the smoothness of the operation of the regulating motor 100, and increasing the performance consistency of the regulating motor 100 in the mass manufacturing process.

[0029] Furthermore, the regulating motor 100 may also include a worm gear 4 and a nut 5, with the screw 3 cooperating with both the worm gear 4 and the nut 5. Power from the regulating motor 100 is transmitted sequentially through the worm gear 4, the screw 3, and the nut 5. The worm gear 4 can cooperate with the screw 3 to transmit power from the output shaft of the regulating motor 100 to the screw 3.

[0030] The output shaft of the regulating motor 100 can be directly connected to the worm gear 4, or the output shaft of the regulating motor 100 can transmit power to the worm gear 4 via a transmission gear. The worm gear 4 is driven to rotate by the regulating motor 100, which in turn drives the screw 3 to rotate. This also achieves a speed reduction and torque increase function, converting the high speed and low torque of the regulating motor 100 into the low speed and high torque output required by the actuator. The transmission ratio between the worm gear 4 and the screw 3 can range from, for example, 5–1000, to meet the adjustment speed requirements in different directions. Furthermore, the fit between the worm gear 4 and the screw 3 can be self-locking, ensuring the actuator and actuator components remain stable when there is no power input, preventing accidental displacement.

[0031] The nut 5 engages with the screw 3, for example, the axis of the nut 5 is parallel to the axis of the screw 3, and is used to convert the rotational motion of the screw 3 into the linear motion of the nut 5. The nut 5 and the screw 3 can be in direct contact, and the external thread of the screw 3 meshes with the internal thread of the nut 5. When the screw 3 rotates, the inclined surface of the thread generates an axial force, pushing the nut 5 to move linearly along the axis of the screw 3. For example, when the screw 3 rotates along a first direction, the nut 5 moves away from the gearbox 1 relative to the screw 3; when the screw 3 rotates along a second direction opposite to the first direction, the nut 5 moves closer to the gearbox 1 relative to the screw 3. A ball bearing circulation system can also be provided between the screw 3 and the nut 5, which, by means of the balls, can convert the rotational motion of the screw 3 into the linear motion of the nut 5.

[0032] An exemplary process of using the nut 5 and screw 3 to drive the seat to rise is as follows: the screw 3 rotates and drives the nut 5 to move linearly along the screw 3, and the nut 5 then drives the support arm to rotate about the fixed hinge point, thereby raising the seat frame.

[0033] The axis of the nut 5 can also be perpendicular to the axis of the screw 3. The rotational motion of the screw 3 can be converted into the rotational motion of the nut 5, and the axis of the nut 5 can rotate relative to the axis of the screw 3.

[0034] An exemplary process for using the aforementioned nut 5 and screw 3 to drive the seat tilt angle adjustment is as follows: the adjustment motor 100 is mounted on the front linkage rod of the seat frame through a metal component; the nut 5 drives the first connecting end of the seat tilt angle adjustment bracket to rotate the seat tilt angle adjustment bracket around the central axis of the front linkage rod; during the rotation of the seat tilt angle adjustment bracket, the second connecting end of the seat tilt angle adjustment bracket drives the seat to rotate around the seat rotation center, thereby changing the tilt angle of the seat.

[0035] The screw 3 includes, for example, a worm gear 32 and a lead screw 33, with the worm gear 32 fixedly connected to the lead screw 33. The worm gear 32 surrounds at least a portion of the lead screw 33 from the outside, and the worm gear 32 is located in the receiving space formed by the gearbox body 11 and the gearbox cover 12. The worm 4 cooperates with the worm gear 32 to transmit power, while the lead screw 33 cooperates with the nut 5 to transmit power. Exemplarily, the lead screw 33 is made of metal, such as steel, and the worm gear 32 is made of plastic. The lead screw and the worm gear 32 are manufactured by insert injection molding. The lead screw 33 and the worm gear 32 are made of different materials, which can utilize the characteristics of their respective materials to balance performance, cost, and lightweight while ensuring transmission reliability, thereby achieving better overall performance.

[0036] Specifically, compared to a metal worm gear 32, using a plastic worm gear 32 can reduce weight, for example, by 30-50%. Furthermore, due to the good vibration absorption properties of plastic, compared to a metal worm gear 32 meshing with a metal worm 4, using a plastic worm gear 32 with a metal worm 4 can significantly reduce noise, for example, by 10-15 dB. In addition, using plastic instead of metal to manufacture the worm gear 32 can reduce material costs and eliminate the costs of metal processing and heat treatment, and the plastic worm gear 32 has better resistance to moisture / salt spray. The worm gear 32 can also be made of self-lubricating plastic, thereby reducing friction with the worm 4.

[0037] Furthermore, the adjusting motor 100 includes a friction pad 13 disposed in the gearbox 1, and the screw 3 includes a shoulder 31. The friction pad 13 abuts against the shoulder 31 to support the screw 3 axially, thereby counteracting the axial force transmitted to the screw 3 by, for example, the worm gear 32 or the nut 5, to maintain the axial stability of the screw 3. The friction pad 13 can directly contact the shoulder 31, and during the rotation of the screw 3 driving the shoulder 31 to rotate, there is relative movement between the shoulder 31 and the friction pad 13, resulting in friction between the friction pad 13 and the shoulder 31. The friction pad 13 can be made of metal material to ensure the accuracy of the axial positioning and the support strength of the screw 3.

[0038] The regulating motor 100 may include two friction pads 13, which support the screw 3 in two opposite axial directions. The left friction pad 13 supports the screw 3 to the right in a direction parallel to the axial direction of the screw 3, and correspondingly, the right friction pad 13 supports the screw 3 to the left in the same direction. In this way, regardless of whether the nut 5 moves closer to or away from the gearbox 1, the reaction force exerted by the actuator on the nut 5 can be canceled by the friction pads 13, thereby reducing the performance difference of the regulating motor 100 between forward and reverse rotation, and reducing the noise of the regulating motor 100 during both forward and reverse rotation.

[0039] The friction pad 13 is mounted on the gearbox 1, and can be installed between the gearbox body 11 and the gearbox cover 12. For example, the friction pad 13 is inserted into and mounted on the gearbox body 11 on one side, and inserted into and mounted on the gearbox cover 12 on the other side. The gearbox cover 12 can be fastened to the gearbox body 11 by a threaded connection. For example, the gearbox cover 12 is fastened to the gearbox body 11 by a screw 15.

[0040] For example, the friction pad 13 is fixed radially outward between the gearbox body 11 and the gearbox cover 12, thereby limiting the radial outward direction of the friction pad 13. Further, the friction pad 13 may contact the screw 3 radially, specifically the radially inner side of the friction pad 13 contacts the screw 3, and thereby provides radial support for the screw 3.

[0041] The friction pad 13 can be fixedly arranged in the axial direction relative to the gearbox body 11 and the gearbox cover 12, and the friction pad 13 can also be movably arranged in the axial direction relative to the gearbox body 11 and the gearbox cover 12.

[0042] When the friction pad 13 is axially movable relative to the gearbox body 11 and the gearbox cover 12, a spring 14 can be provided between the friction pad 13 and the gearbox 1 to support the friction pad 13 axially on the screw 3. Due to manufacturing tolerances or installation requirements, the relative position of the screw 3 to the gearbox 1 in the axial direction may vary. By means of the foregoing, the axial positional variation of the screw 3 relative to the gearbox 1 can be accommodated, ensuring that the friction pad 13 remains firmly against the shoulder 31 of the screw 3 and provides reliable support in the axial direction of the screw 3.

[0043] This application also includes an automobile equipped with an adjustment motor according to any one or more of the foregoing embodiments, the technical features and effects of which correspond to the foregoing description, and therefore will not be repeated here.

Claims

1. A regulating motor (100), characterized by, The regulating motor (100) includes: Gearbox (1), the gearbox (1) includes a gearbox body (11) and a gearbox cover (12); Bearing (2), said bearing (2) being installed between the gearbox body (11) and the gearbox cover (12); and The screw (3) is supported at its end by the bearing (2) on the gearbox (1).

2. The regulating electric motor (100) according to claim 1, characterized in that, The regulating motor (100) includes a friction pad (13) disposed in the gearbox (1), and the screw (3) includes a shoulder (31). The friction pad (13) abuts against the shoulder (31) to support the screw (3) axially.

3. The regulating electric motor (100) according to claim 2, characterized in that, The regulating motor (100) includes two friction pads (13), which support the screw (3) in two opposite directions.

4. The regulating electric motor (100) according to claim 2, characterized in that, A spring (14) is provided between the friction pad (13) and the gearbox (1) for axially supporting the friction pad (13) on the screw (3).

5. The regulating electric motor (100) according to claim 1, characterized in that, The regulating motor (100) includes a worm (4) and a nut (5). The screw (3) is engaged with the worm (4) and the nut (5) respectively. The power from the regulating motor (100) is transmitted sequentially through the worm (4), the screw (3) and the nut (5).

6. The regulating electric motor (100) according to claim 5, characterized in that, The screw (3) includes a worm gear (32) and a lead screw (33). The worm gear (32) is fixedly connected to the lead screw (33). The worm (4) is engaged with the worm gear (32). The lead screw (33) is engaged with the nut (5).

7. The regulating electric motor (100) according to claim 6, characterized in that, The lead screw (33) is made of metal, and the worm gear (32) is made of plastic. The lead screw and the worm gear (32) are manufactured by insert injection molding.

8. The regulating electric motor (100) according to claim 1, characterized in that, The gearbox cover (12) is fastened to the gearbox body (11) by a threaded connector.

9. The regulating electric motor (100) according to claim 1, characterized in that, The bearing (2) is a ball bearing or an angular contact ball bearing.

10. An automobile characterized by comprising: It includes an adjusting motor (100) according to any one of claims 1 to 9.

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