Seat drive device

Abstract

The application discloses a seat driving device; comprising a shock pad and a box; the box is provided with a first part and a second part arranged in an inverted T shape, the width of the first part is smaller than that of the second part; the shock pad is installed on the outside of the box, and the shock pad is provided with a supporting part at the step position formed by the first part and the second part. The beneficial effects of the application are as follows: through the limiting installation of the inverted T-shaped box and the shock pad, the shock absorption performance of the seat driving device is enhanced, and through the supporting part of the shock pad, the operation stability of the seat driving device is enhanced.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a seat drive device. Background Technology

[0002] The seat drive mechanism is the core component of an automotive electric seat system, primarily used to control the precise fore-and-aft movement of the seat along guide rails. Its smoothness of movement determines the passenger's comfort during adjustment; the operating noise level, durability, and response speed of this mechanism are also important performance indicators.

[0003] In traditional seat drive systems, due to the lightweight nature and low vibration of the equipment, a simple rectangular box structure is typically used, with internal cushioning materials to reduce vibration transmission. This satisfies support requirements while reducing manufacturing and assembly complexity. However, with the development of new energy vehicle technology and the increasing demand for electric seat adjustment functions, the output power of the drive motor needs to increase. This makes the strength and vibration damping performance of the traditional rectangular box structure insufficient, and also places higher demands on the matching accuracy and stability of the box and the damping pad. Otherwise, insufficient stability or installation deviations can lead to reduced vibration damping and noise. Therefore, a new solution is urgently needed. Utility Model Content

[0004] The purpose of this application is to provide a seat drive device that can solve the above-mentioned defects in the background technology.

[0005] To achieve the above objectives, this application provides a seat drive device, including a shock-absorbing pad and a housing; the housing is provided with a first part and a second part arranged in an inverted T shape, the width of the first part being smaller than that of the second part; the shock-absorbing pad is installed on the outside of the housing, and the shock-absorbing pad is provided with a support portion at the step position formed by the first part and the second part.

[0006] Preferably, the extension length of the support portion at one side of the step position is 50%-100% of the extension length of the step position.

[0007] Preferably, the support portion is located at the middle of the step position; or, the support portion is located at both ends of the step position along the extending direction.

[0008] Preferably, a plurality of support blocks are provided at equal intervals along the extension direction at the step position, and the plurality of support blocks cooperate to form the support part.

[0009] Preferably, the outer contour of the cross-section of the support is a slanted line with an inclination angle of 15°-75°.

[0010] Preferably, the outer contour of the cross-section of the support portion is an outwardly convex arc shape.

[0011] Preferably, the side of the first part is provided with a protruding limiting block, and the shock-absorbing pad is provided with a limiting groove corresponding to the area of ​​the first part that cooperates with the limiting block; or, the side of the first part is provided with a concave limiting groove, and the shock-absorbing pad is provided with a limiting block corresponding to the area of ​​the first part that cooperates with the limiting groove.

[0012] Preferably, the box body includes a first half-box body and a second half-box body; the box body is provided with a recessed bolt mounting position, and the first half-box body and the second half-box body are fastened together by installing bolts at the bolt mounting position.

[0013] Preferably, a transmission assembly is installed inside the housing; the transmission assembly includes a plurality of sequentially meshing transmission gears, and a weight-reducing zone is formed between adjacent transmission gears in the housing; a weight-reducing cavity is provided on the inner and / or outer side of the weight-reducing zone in the housing.

[0014] Preferably, the housing has an opening on the side wall of the second part corresponding to the output side of the transmission assembly, and the opening corresponds to the position of the gear teeth of the transmission gear.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] In the technical solution of this application, the shock absorption performance of the seat drive device is enhanced by the limiting installation of the inverted T-shaped box and the shock-absorbing pad, and the operating stability of the seat drive device is enhanced by the supporting function of the shock-absorbing pad. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial structural diagram of the support portion located at both ends of the step in this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 4 This is a partial structural schematic diagram of one example of the support part in this utility model;

[0021] Figure 5 This is a partial structural schematic diagram of another example of the support portion in this utility model;

[0022] Figure 6 This is a schematic diagram showing the disassembled state of the housing and shock-absorbing pad of this utility model.

[0023] In the diagram: shock absorber 1, support 110, support block 111, housing 2, first part 210, second part 220, first half housing 230, second half housing 240, first limiting block 310, first limiting groove 320, second limiting block 410, second limiting groove 420, first weight reduction cavity 510, second weight reduction cavity 520, bolt 6, input gear 710, transition gear 720, output gear 730. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] A preferred embodiment of this application, such as Figure 1 As shown, a seat drive device includes a shock-absorbing pad 1 and a housing 2; the housing 2 is provided with a first part 210 and a second part 220 arranged in an inverted T shape, the width of the first part 210 being smaller than that of the second part 220; the shock-absorbing pad 1 is installed on the outside of the housing 2, and the shock-absorbing pad 1 is provided with a support part 110 at the step position formed by the first part 210 and the second part 220.

[0029] It should be noted that a transmission component is installed inside the housing 2, specifically a transmission gear. Since the output side needs to be threaded with the long screw, the second part 220 is wider than the first part 210. Therefore, the housing 2 is arranged in an inverted T shape. The upper and lower dimensions of the shock-absorbing pad 1 also change with the dimensions of the housing 2, with the upper dimension being smaller than the lower dimension.

[0030] It is understandable that, since the width of the first part 210 is smaller than that of the second part 220, the upper part of the shock-absorbing pad 1 is also reduced in size to completely and well cover the housing 2. Due to the reduction in size, vibration occurs during the movement along the screw. Furthermore, since the shock-absorbing pad 1 is made of elastic material, it is prone to elastic deformation. Due to the step position, the upper part of the shock-absorbing pad 1 is prone to tilting outward. Therefore, the support part 110 provided at the step position formed by the first part 210 and the second part 220 of the shock-absorbing pad 1 can effectively support the upper part of the shock-absorbing pad 1, preventing it from tilting outward and enhancing the operational stability of the seat drive device.

[0031] It should also be known that protruding mounting blocks can be evenly spaced along the height direction on the side of the shock-absorbing pad 1 corresponding to the first part 210. The mounting blocks can cooperate with the mounting groove inside the seat, so that the shock-absorbing pad 1 can be firmly installed on the lower part of the seat, which can enhance the shock absorption performance and stability of the seat drive device.

[0032] A preferred embodiment of this application, such as Figure 1-2 As shown, the extension length of the support 110 at the single-sided step position is 50%-100% of the extension length of the step position.

[0033] It should be understood that the extension length of the support portion 110 at the single-sided step position should reach a certain length to ensure that the upper part of the shock-absorbing pad 1 does not warp outward. Therefore, the extension length of the support portion 110 can be selected to be 100% of the extension length of the step position, and it should be completely evenly distributed at the step position. If the length is too short, the increased bending stiffness will be insufficient and it will not be able to meet the support function. Therefore, in this embodiment, the extension length of the support portion 110 at the single-sided step position is at least 50% of the extension length of the step position, and preferably the extension length of the support portion 110 is 50%-100% of the extension length of the step position.

[0034] It is understandable that the extension length of the step position refers to the length of the intersection line between the first part 210 and the second part 220 of the box body 2 at the step position, and the extension length of the support part 110 refers to the setting length of the support part 110 on the step and parallel to the extension length of the step position.

[0035] It is also understandable that, as a preferred option, the support 110 can be evenly distributed in the middle of the step position or evenly distributed at both ends of the step position along the extension direction, depending on the actual design and stress conditions.

[0036] In a preferred embodiment of this application, the support portion 110 is disposed at the middle of the step position; or, the support portion 110 is disposed at both ends of the step position along the extending direction.

[0037] It should be known that, as Figure 1 As shown, the support part 110 is set in the middle of the step position. The uniformly distributed support part 110 in the middle of the step position can effectively disperse the load of the upper part of the shock-absorbing pad 1 that is raised outward, and the support force is evenly distributed on both sides of the axis of symmetry of the shock-absorbing pad 1, which can maintain good structural stability.

[0038] It should also be known that, such as Figure 2 As shown, under specific installation conditions or under specific seat structure stress conditions, the outward warping force of the shock-absorbing pad 1 may be concentrated at both ends of the step. Therefore, evenly distributed support parts 110 can be set at both ends to better support the shock-absorbing pad 1 against the outward warping force, reduce material usage, simplify structural design, facilitate manufacturing and molding, and improve production efficiency.

[0039] It is understandable that the evenly distributed support portion 110 simplifies the structural design, facilitates manufacturing, and improves production efficiency. The evenly distributed support portion 110 can be a long strip support portion 110 or a support portion 110 formed by the cooperation of multiple support blocks 111. As a preferred embodiment, for better weight reduction and support effect, this embodiment preferably uses a support portion 110 formed by the cooperation of multiple support blocks 111.

[0040] A preferred embodiment of this application, such as Figure 1-2 As shown, multiple support blocks 111 are evenly spaced along the extension direction at the step position, and the multiple support blocks 111 cooperate to form a support part 110.

[0041] It should be understood that, in order to reduce the weight and achieve a better support effect, multiple support blocks 111 can be set at equal intervals along the extension direction at the step position to form a support part 110. Compared with the long strip support part 110, the equal interval setting can make the bending stiffness at the step position more uniform under the same material, making the upper part of the shock-absorbing pad 1 less likely to warp outward.

[0042] Understandably, the equally spaced support blocks 111 can distribute the load on the upper part of the damping pad 1 evenly to different positions of the step, avoiding excessive local stress caused by single-point support and improving structural durability.

[0043] It is also understandable that when the extension direction of the steps has curvature or other parts constrain the position, multiple spaced support blocks 111 can better adjust the layout to adapt to more complex structures and improve the flexibility of the design.

[0044] A preferred embodiment of this application, such as Figure 3-4 As shown, the outer contour of the cross-section of the support part 110 is a slanted line with an inclination angle of 15°-75°.

[0045] It should be understood that the inclination angle of the outer contour line refers to the angle between the outer contour line of the support part 110 and the horizontal line. When the angle is too small, the contact area between the support part 110 and the upper part of the shock-absorbing pad 1 is too small, and it cannot effectively support the upper part of the shock-absorbing pad 1; when the angle is too large, the contact area between the support 110 and the step position of the shock-absorbing pad 1 is too small, and it cannot effectively decompose and bear the outward warping force of the upper part of the shock-absorbing pad 1. Therefore, in this embodiment, the preferred inclination angle is 15°-75°, which enables the support part 110 to generate a good force decomposition effect when bearing the outward warping force of the upper part of the shock-absorbing pad 1, effectively suppressing the outward warping displacement of the upper part of the shock-absorbing pad 1 and improving the stability of the structure. More preferably, the inclination angle is 45°, which can fully utilize the supporting function of the support part 110.

[0046] It should also be noted that the support section 110 of the oblique outer contour has a better material utilization rate than the traditional rectangular section, and can reduce the amount of material used while maintaining anti-warping performance.

[0047] It is understandable that a transition fillet can be provided at the end of the support portion 110 of the oblique outer contour to reduce stress concentration.

[0048] A preferred embodiment of this application, such as Figure 5 As shown, the outer contour of the cross-section of the support part 110 is an outwardly convex arc.

[0049] It should be understood that adopting an outwardly convex arc design allows the support portion 110 to generate a more uniform stress distribution when bearing the outward tilting force of the upper part of the shock-absorbing pad 1, reducing the maximum stress of the support portion 110 and further improving the fatigue life of the support portion 110. If an inwardly concave arc design is adopted, the thickness of the support portion 110 is thinner, and the bending stiffness is smaller, making it difficult to play a good supporting role when bearing the outward tilting force of the upper part of the shock-absorbing pad 1. Therefore, this embodiment preferably adopts an outwardly convex arc design.

[0050] Understandably, the curved line design offers better molding processability, making injection molding smoother and avoiding stress concentration issues caused by sharp corners.

[0051] A preferred embodiment of this application, such as Figure 4 and Figure 6 As shown, the side of the first part 210 is provided with a protruding limiting block, and the shock-absorbing pad 1 is provided with a limiting groove that mates with the limiting block in the area corresponding to the first part 210; or, as Figure 5 As shown, the side of the first part 210 is provided with a concave limiting groove, and the shock-absorbing pad 1 is provided with a limiting block that cooperates with the limiting groove in the area corresponding to the first part 210.

[0052] It should be understood that a protruding first limiting block 310 is provided in the first part 210, and a first limiting groove 320 that cooperates with the first limiting block 310 is provided in the area of ​​the first part 210 corresponding to the shock-absorbing pad 1. When the shock-absorbing pad 1 is installed on the housing 2, the first limiting block 310 is installed in the first limiting groove 320 to achieve the effect of limiting installation, so that the shock-absorbing pad 1 can be accurately installed on the outside of the housing 2 and limited and fixed, preventing the shock-absorbing pad 1 from slipping off the housing 2.

[0053] It is understandable that, such as Figure 5 As shown, the positions of the first limiting block 310 and the first limiting groove 320 can be interchanged. A protruding first limiting block 310 can be provided on the shock-absorbing pad 1, and a first limiting groove 320 corresponding to the first limiting block 310 can be provided at the corresponding position of the first part 210.

[0054] A preferred embodiment of this application, such as Figure 1 and Figure 6 As shown, the housing 2 includes a first half-housing 230 and a second half-housing 240; the housing 2 is provided with a recessed bolt mounting position, and the first half-housing 230 and the second half-housing 240 are fastened together by installing bolts 6 at the bolt mounting position.

[0055] It should be understood that a transmission component is provided inside the housing 2. Therefore, the housing 2 is preferably assembled and connected by the first half housing 230 and the second half housing 240, and the first half housing 230 and the second half housing 240 are preferably fastened together by bolts 6.

[0056] It should also be known that, such as Figure 6 As shown, since the housing 2 has a recessed bolt mounting position, in order to increase the limiting and fixing performance and further improve the shock absorption effect of the shock absorber 1, a second limiting block 410 can be set at the bottom of the shock absorber 1. Preferably, four second limiting blocks 410 are set at the four corners of the bottom of the shock absorber 1. A second limiting groove 420 corresponding to the second limiting block 410 is set at the corresponding position of the second part 220. The second limiting block 410 and the second limiting groove 420 cooperate.

[0057] It is understandable that the bolt 6 is installed on the housing 2 through the recessed bolt installation position, which can reduce the impact of the bolt 6 on the installation of the shock-absorbing pad 1, and make the dimensions of the housing 2 more regular, so that the external dimensions of the housing 2 will not protrude due to the protrusion of the bolt 6, thus avoiding complex changes in the stress.

[0058] It is also understandable that the bolt 6 is installed on the housing 2 through the concave bolt mounting position, which allows the housing 2 to cover the shock-absorbing pad 1 more tightly. Furthermore, when the housing 2 is installed under the seat through the shock-absorbing pad 1, the installation will not be affected by the protrusion of the bolt 6.

[0059] A preferred embodiment of this application, such as Figure 3 As shown, a transmission assembly is installed inside the housing 2. The transmission assembly includes multiple sequentially meshing transmission gears. A weight reduction zone is formed between adjacent transmission gears in the housing 2. A weight reduction cavity is provided on the inner and / or outer side of the weight reduction zone in the housing 2.

[0060] Understandably, the function of the first weight-reducing cavity 510 and the second weight-reducing cavity 520 is to effectively reduce the weight of the housing 2 while ensuring the structural strength of the housing 2. The first weight-reducing cavity 510 is located inside the housing 2 to reduce its weight, and the cavity itself can reduce the vibration and noise generated by the housing 2. Lightweight damping material can be filled into the cavity to further reduce the vibration and noise generated by the housing 2. The second weight-reducing cavity 520 is located outside the housing 2 and avoids the location of the bolt 6, so that it can effectively reduce the weight of the housing 2 without affecting the key transmission components and the stress area of ​​the bolt 6.

[0061] It is also understandable that by reducing the weight of the upper part of box 2, the overall structure can be made more stable and less prone to overturning.

[0062] A preferred embodiment of this application, such as Figure 1 and Figure 6 As shown, the second part 220 of the housing 2, corresponding to the output side of the transmission component, has an opening on its side wall, and the opening corresponds to the position of the gear teeth of the transmission gear.

[0063] It should be understood that the transmission gear consists of an input gear 710, a transition gear 720, and an output gear 730. The output side of the transmission assembly corresponds to the output gear 730. Since the output gear 730 is used to engage with the traveling screw, the size of the output gear 730 is usually large. If the housing 2 does not provide an opening at the position of the tooth corresponding to the output gear 730, the housing will have a protruding part at the corresponding position of the output gear 730, which will affect the installation of the seat drive device and the lower part of the seat.

[0064] Understandably, setting an opening structure on the housing 2 not only avoids interference between the housing 2 and the output gear 730 due to size limitations, but also allows for better observation of the usage of the output gear 730, and whether it has been damaged or malfunctioned.

[0065] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A seat drive device, characterized in that: It includes a shock-absorbing pad and a housing; the housing is provided with a first part and a second part arranged in an inverted T shape, the width of the first part being smaller than that of the second part; the shock-absorbing pad is installed on the outside of the housing, and the shock-absorbing pad is provided with a support portion at the step position formed by the first part and the second part.

2. The seat drive device as described in claim 1, characterized in that: The extension length of the support portion at the step position on one side is 50%-100% of the extension length of the step position.

3. The seat drive device as described in claim 2, characterized in that: The support portion is located at the middle of the step position; or, the support portion is located at both ends of the step position along the extension direction.

4. The seat drive device as described in claim 2, characterized in that: Multiple support blocks are evenly spaced along the extension direction at the step position, and the multiple support blocks cooperate to form the support part.

5. The seat drive device according to any one of claims 2-4, characterized in that: The outer contour of the cross section of the support is a slanted line with an inclination angle of 15°-75°.

6. The seat drive device according to any one of claims 2-4, characterized in that: The outer contour of the cross-section of the support part is an outwardly convex arc.

7. The seat drive device as described in claim 1, characterized in that: The first part has a protruding limiting block on its side, and the shock-absorbing pad has a limiting groove that mates with the limiting block in the area corresponding to the first part; or, the first part has a concave limiting groove on its side, and the shock-absorbing pad has a limiting block that mates with the limiting groove in the area corresponding to the first part.

8. The seat drive device as claimed in claim 1, characterized in that: The enclosure includes a first half-enclosure and a second half-enclosure; the enclosure is provided with recessed bolt mounting positions, and the first half-enclosure and the second half-enclosure are fastened together by installing bolts at the bolt mounting positions.

9. The seat drive device as claimed in claim 1, characterized in that: The housing is equipped with a transmission assembly, which includes a plurality of sequentially meshing transmission gears. The housing forms a weight-reduction zone between adjacent transmission gears. The housing has a weight-reduction cavity on the inner and / or outer side of the weight-reduction zone.

10. The seat drive device as claimed in claim 9, characterized in that: The housing has an opening on the side wall of the second part corresponding to the output side of the transmission component, and the opening corresponds to the position of the gear teeth of the transmission gear.

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