Intelligent seat adjusting transmission unit

Abstract

The utility model discloses an intelligent seat adjusting transmission unit which comprises a worm gear, a worm and a shell used for containing the worm gear and the worm in a relatively rotating mode, a main containing cavity used for containing the worm gear is formed in the middle area of the shell, an auxiliary containing cavity used for containing the worm is formed above the main containing cavity, and the main containing cavity communicates with the auxiliary containing cavity. The worm gear and the worm are meshed with each other; a main opening is formed in at least one side of the main containing cavity so as to communicate the main containing cavity with the outside, and at least part of the worm gear is located in the main opening. The main hole is formed in one side of the main containing cavity, and the main containing cavity communicates with the outside, so that at least part of the worm gear is located in the main hole, and the thickness of the intelligent adjustment transmission unit of the seat is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to an intelligent seat adjustment transmission unit. Background Art

[0002] The seat intelligent adjustment transmission unit is a common mechanism for adjusting the seat position in automobiles. It is set between the seat and the bottom of the car body and is used to achieve the transmission connection between the seat and the guide rail at the bottom of the car body. When the motor is working, it can move the seat along the guide rail through the seat intelligent adjustment transmission unit, thereby achieving the purpose of adjusting the seat position. Existing seat intelligent adjustment transmission units usually use worm gear transmission to make the car seat move smoothly.

[0003] Increasing the transmission ratio of the worm wheel and the worm helps to improve the load-bearing capacity and running smoothness of the seat intelligent adjustment transmission unit. However, as the number of worm wheel teeth increases, the radial size of the worm wheel will increase accordingly, and the space inside the car seat is small, which limits the size of the seat intelligent adjustment transmission unit. Therefore, how to keep the seat intelligent adjustment transmission unit small while increasing the transmission ratio is an urgent problem to be solved. Utility Model Content

[0004] One object of the present application is to provide a seat intelligent adjustment transmission unit, which can improve the transmission ratio while keeping the seat intelligent adjustment transmission unit small in size.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a seat intelligent adjustment transmission unit, comprising a worm wheel, a worm, and a housing for relatively rotatably accommodating the worm wheel and the worm, the middle area of ​​the housing having a main accommodating chamber for accommodating the worm wheel, a secondary accommodating chamber for accommodating the worm above the main accommodating chamber, the main accommodating chamber and the secondary accommodating chamber being communicated so that the worm wheel and the worm are meshed with each other; a main opening is provided on at least one side of the main accommodating chamber to connect the main accommodating chamber with the outside world, and at least part of the worm wheel is located in the main opening.

[0006] As a preferred embodiment, the worm wheel comprises an external tooth portion for meshing with the worm, and the radius of the external tooth portion is d 1 , the width of the main opening is K Z , satisfying: K Z ≤2d 1 .

[0007] As a preferred embodiment, the outer tooth portion is accommodated in the outer shell, and the minimum distance from the outer tooth portion to the outer wall of the main opening is H Z , satisfying: 0≤H Z ≤1mm.

[0008] As a preferred embodiment, the worm gear also includes a journal neck located at both ends of the outer tooth portion; the seat intelligent adjustment transmission unit also includes a first sleeve, the first sleeve includes a first support section and a first wear-resistant section arranged in sequence along the axial direction, when the first sleeve is sleeved on the journal neck, the first support section is suitable for supporting the worm gear to rotate relative to the housing, and the first wear-resistant section is located between the outer tooth portion of the worm gear and the housing; the axial length of the outer tooth portion is L 1 , the axial length of the first wear-resistant section is T 1 , the length of the main opening is L Z , satisfying: L 1 ≤L Z ≤L 1 +2T 1 .

[0009] Preferably, a secondary opening is provided on a side of the secondary accommodating chamber away from the main accommodating chamber to connect the secondary accommodating chamber with the outside, so that at least a part of the worm is located in the secondary opening.

[0010] As a preferred embodiment, the worm comprises a meshing portion for meshing with the worm wheel, the meshing portion protrudes from the housing through the secondary opening, and the radius of the meshing portion is d 2 The distance from the axis of the worm to the outer wall of the secondary opening is H F , satisfying: H F ≤d 2 .

[0011] As a preferred embodiment, the width of the secondary opening is K F , satisfying: K F ≤2d 2 .

[0012] As a preferred embodiment, the worm further comprises a rod neck portion located at both ends of the meshing portion; the seat intelligent adjustment transmission unit further comprises a second shaft sleeve, the second shaft sleeve comprises a second supporting section and a second wear-resistant section arranged in sequence along the axial direction, when the second shaft sleeve is sleeved on the rod neck portion, the second supporting section is suitable for supporting the worm to rotate relative to the housing, and the second wear-resistant section is located between the meshing portion of the worm and the housing; the axial length of the meshing portion is L 2 , the axial length of the second wear-resistant section is T 2 , the length of the secondary opening is L F , satisfying: L 2 ≤L F ≤L 2 +2T 2 .

[0013] Preferably, the worm has a connecting groove, the opening of which is located on the end face of one of the rod necks for connecting to a driving member; the housing has a main opening, and the main opening and the opening of the connecting groove are located on the same side of the housing.

[0014] As a preference, the seat intelligent adjustment transmission unit further comprises a shock absorbing component, and the shock absorbing component is mounted at opposite ends of the outer shell along the axial direction of the worm.

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

[0016] (1) By opening a main opening on one side of the main accommodating cavity to connect the main accommodating cavity with the outside, at least part of the worm gear is located in the main opening, thereby facilitating the reduction of the thickness of the seat intelligent adjustment transmission unit;

[0017] (2) By starting the secondary opening on the side of the secondary accommodating chamber away from the main accommodating chamber and connecting the secondary accommodating chamber with the outside, at least part of the worm gear is located in the secondary opening, which is beneficial to reducing the height of the seat intelligent adjustment transmission unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of a seat intelligent adjustment transmission unit of some embodiments of the present application;

[0019] Figure 2 is a structural schematic diagram of a housing of a seat intelligent adjustment transmission unit in some embodiments of the present application;

[0020] Figure 3 is an exploded diagram of a seat intelligent adjustment transmission unit of some embodiments of the present application;

[0021] Figure 4 is a schematic diagram of the internal structure of a seat intelligent adjustment transmission unit of some embodiments of the present application;

[0022] Figure 5 is a dimensioned diagram of a main opening of a seat intelligent adjustment transmission unit in some embodiments of the present application;

[0023] Figure 6 is a cross-sectional view of a seat intelligent adjustment transmission unit according to some embodiments of the present application;

[0024] Figure 7 is a top view of a seat intelligent adjustment transmission unit of some embodiments of the present application;

[0025] Figure 8 is a dimensioned diagram of a secondary opening of a seat intelligent adjustment transmission unit in some embodiments of the present application;

[0026] Fig. 9is a dimensioned diagram of a worm and a second sleeve of a seat intelligent adjustment transmission unit in some embodiments of the present application;

[0027] Fig.10 It is a structural schematic diagram of a seat intelligent adjustment transmission unit of some embodiments of the present application.

[0028] In the figure: 10, outer shell; 11, main accommodating chamber; 12, main opening; 13, auxiliary accommodating chamber; 14, auxiliary opening; 20, worm gear; 21, external tooth portion; 22, neck portion; 23, internal tooth portion; 30, first sleeve; 31, first supporting section; 32, first wear-resistant section; 40, worm; 41, meshing portion; 42, neck portion; 43, connecting groove; 50, second sleeve; 51, second supporting section; 52, second wear-resistant section; 60, shock-absorbing member. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] A seat intelligent adjustment transmission unit, such as Figure 1-Figure 3 As shown, it includes a worm wheel 20, a worm 40, and a housing 10 for relatively rotatably accommodating the worm wheel 20 and the worm 40. The middle area of ​​the housing 10 has a main accommodating chamber 11 for accommodating the worm wheel 20, and the upper part of the main accommodating chamber 11 has a secondary accommodating chamber 13 for accommodating the worm 40. The main accommodating chamber 11 and the secondary accommodating chamber 13 are connected to each other so that the worm wheel 20 and the worm 40 can mesh with each other. At least one side of the main accommodating chamber 11 is provided with a main opening 12 to connect the main accommodating chamber 11 with the outside world, and at least part of the worm wheel 20 is located in the main opening 12.

[0033] It is understandable that the worm wheel and worm of the existing seat intelligent adjustment transmission unit are completely accommodated in the shell, and the thickness of the seat intelligent adjustment transmission unit needs to consider the radial size of the worm wheel, the wall thickness of the shell, and the gap between the shell and the worm wheel. And as the number of teeth of the worm wheel increases, the radial size of the worm wheel will increase accordingly. In this embodiment, at least one side of the main accommodating chamber 11 is provided with a main opening 12, so that the main accommodating chamber 11 and the outside world are connected. That is to say, on the side where the main opening 12 is provided, there is no need to consider the gap between the worm wheel 20 and the shell 10 and the wall thickness of the shell 10, which is conducive to reducing the thickness of the seat intelligent adjustment transmission unit. Further, the number of teeth of the worm wheel 20 can be increased while keeping the thickness of the seat intelligent adjustment transmission unit as thin as possible, so as to improve the transmission ratio of the worm wheel 20 and the worm 40, so that the load-bearing capacity and running stability of the seat intelligent adjustment transmission unit are improved.

[0034] It is worth mentioning that when the transmission ratio of the worm wheel 20 and the worm 40 is increased, the heat generated by the transmission also increases. The main opening 12 is conducive to dissipating the heat in the housing 10, thereby avoiding the worm wheel 20 and the worm 40 from working in a high temperature environment, which is conducive to extending the service life of the worm wheel 20 and the worm 40.

[0035] In some embodiments, Figure 4 and Figure 5 As shown, the worm wheel 20 includes an outer tooth portion 21 for meshing with the worm 40, and the radius of the outer tooth portion 21 is d 1 , the width of the main opening 12 is K Z , satisfying: K Z ≤2d 1 That is to say, the width of the main opening 12 is smaller than the diameter of the outer tooth portion 21 of the worm wheel 20, and thus the circumferentially opposite parts of the housing 10 and the outer tooth portion 21 form a major arc, so that the outer tooth portion 21 can be positioned circumferentially by the housing 10, which is beneficial to reduce the influence of the main opening 12 on the connection reliability of the worm wheel 20 and the housing 10. In addition, when the worm wheel 20 is accidentally broken or detached from the support, since the width of the main opening 12 is smaller than the diameter of the outer tooth portion 21 of the worm wheel 20, the broken part of the worm wheel 20 is difficult to fall out of the housing 10 from the main opening 12, which is beneficial to improve the safety of the seat intelligent adjustment transmission unit.

[0036] In some embodiments, Figure 6 As shown, the outer tooth portion 21 is accommodated in the housing 10, and the minimum distance from the outer tooth portion 21 to the outer wall of the main opening 12 is H Z , satisfying: 0≤H Z≤1mm. That is to say, the outer tooth portion 21 of the worm wheel 20 does not protrude from the outside of the outer shell 10, which is conducive to avoiding the interference of the outer tooth portion 21 with other objects during the movement of the seat intelligent adjustment transmission unit, thereby reducing the risk of damage to the outer tooth portion 21, which is conducive to extending the service life of the worm wheel 20. It can be understood that the outer edge of the outer tooth portion 21 can be located within the inner wall of the main opening 12, or between the outer wall and the inner wall of the main opening 12. In addition, H≤1mm, while avoiding the interference of the outer tooth portion 21 with other objects, it can further avoid the outer wall of the main opening 12 from exceeding the outer edge of the outer tooth portion 21 too much, which is conducive to making the thickness of the seat intelligent adjustment transmission unit as small as possible.

[0037] In some embodiments, Figure 4 and Figure 5 As shown, the worm wheel 20 also includes a journal 22 located at both ends of the outer tooth portion 21; the seat intelligent adjustment transmission unit also includes a first sleeve 30, the first sleeve 30 includes a first support section 31 and a first wear-resistant section 32 arranged in sequence along the axial direction. When the first sleeve 30 is sleeved on the journal 22, the first support section 31 is suitable for supporting the worm wheel 20 to rotate relative to the housing 10. The first wear-resistant section 32 is located between the outer tooth portion 21 of the worm wheel 20 and the housing 10, so as to reduce the wear between the end face of the outer tooth portion 21 and the housing 10, and further extend the service life of the worm wheel 20. The axial length of the outer tooth portion 21 is L 1 , the axial length of the first wear-resistant section 32 is T 1 , the length of the main opening 12 is L Z , satisfying: L 1 ≤L Z ≤L 1 +2T 1 .

[0038] That is to say, the main opening 12 is suitable for exposing the full length of the outer tooth portion 21 and a portion of the first wear-resistant section 32 in the axial direction of the worm gear 20, thereby reducing the interference of the two side walls opposite to each other along the length direction of the main opening 12 with the outer tooth portion 21 of the worm gear 20, so that the rotation of the worm gear 20 is smoother, and the outer casing 10 is able to position the first wear-resistant section 32 in the circumferential direction to improve the connection reliability between the first sleeve 30 and the outer casing 10.

[0039] In some embodiments, Figure 6-Figure 8 As shown, a secondary opening 14 is provided on the side of the secondary accommodating chamber 13 away from the main accommodating chamber 11 to connect the secondary accommodating chamber 13 with the outside, so that at least part of the worm 40 is located in the secondary opening 14, which is beneficial to reduce the height of the seat intelligent adjustment transmission unit.

[0040] It is understandable that the worm wheel and worm of the existing seat intelligent adjustment transmission unit are completely accommodated in the shell, and the thickness of the seat intelligent adjustment transmission unit needs to consider the radial size of the worm wheel, the radial size of the worm, the wall thickness of the shell, and the gap between the worm wheel, the worm and the shell. And as the number of teeth on the worm wheel increases, the radial size of the worm wheel will increase accordingly. In this embodiment, on the side where the secondary opening 14 is provided, there is no need to consider the gap between the worm 40 and the shell 10 and the wall thickness of the shell 10, which is conducive to reducing the height of the seat intelligent adjustment transmission unit. In addition, the heat in the shell 10 can be dissipated through the secondary opening 14, which is conducive to extending the service life of the worm wheel 20 and the worm 40.

[0041] In some embodiments, Figure 6 As shown, the worm 40 includes a meshing portion 41 for meshing with the worm wheel 20. The meshing portion 41 protrudes from the housing 10 through the secondary opening 14. The radius of the meshing portion 41 is d 2 The distance from the axis of the worm 40 to the outer wall of the secondary opening 14 is H F , satisfying: H F ≤d 2 That is to say, the outer wall of the secondary opening 14 is lower than the outer edge of the worm 40, which is beneficial to reduce the influence of the housing 10 on the height of the seat intelligent adjustment transmission unit. Furthermore, the height of the seat intelligent adjustment transmission unit mainly depends on the radial dimensions of the worm wheel 20 and the radial dimensions of the worm 40, so that the number of teeth of the worm wheel 20 can be increased while keeping the height of the seat intelligent adjustment transmission unit as small as possible, so as to improve the transmission ratio of the worm wheel 20 and the worm 40, so that the load-bearing capacity and running stability of the seat intelligent adjustment transmission unit are improved.

[0042] In some embodiments, Figure 6-Figure 9 As shown, the width of the secondary opening 14 is K F , satisfying: K F ≤2d 2 That is to say, the width of the secondary opening 14 is smaller than the diameter of the meshing portion 41 of the worm 40, and thus the circumferentially opposite parts of the housing 10 and the meshing portion 41 form a major arc, so that the meshing portion 41 can be positioned circumferentially by the housing 10, which is beneficial to reduce the influence of the secondary opening 14 on the connection reliability between the worm 40 and the housing 10. In addition, when the worm 40 is accidentally broken or detached from the support, since the width of the secondary opening 14 is smaller than the diameter of the outer tooth portion 21 of the worm 40, the broken part of the worm 40 is difficult to fall out of the housing 10 from the secondary opening 14, which is beneficial to improve the safety of the seat intelligent adjustment transmission unit.

[0043] In some embodiments, Figure 7-Figure 9As shown, the worm 40 also includes a rod neck 42 located at both ends of the meshing portion 41; the seat intelligent adjustment transmission unit also includes a second sleeve 50, and the second sleeve 50 includes a second support section 51 and a second wear-resistant section 52 arranged in sequence along the axial direction. When the second sleeve 50 is sleeved on the rod neck 42, the second support section 51 is suitable for supporting the worm 40 to rotate relative to the housing 10. The second wear-resistant section 52 is located between the meshing portion 41 of the worm 40 and the housing 10, so as to reduce the wear between the end face of the meshing portion 41 and the housing 10, and further extend the service life of the worm 40. The axial length of the meshing portion 41 is L 2 The axial length of the second wear-resistant section 52 is T 2 , the length of the secondary opening 14 is L F , satisfying: L 2 ≤L F ≤L 2 +2T 2 .

[0044] That is to say, the secondary opening 14 is suitable for exposing the full length of the meshing portion 41 and a portion of the second wear-resistant section 52 in the axial direction of the worm 40, thereby reducing the interference of the two side walls opposite to each other along the length direction of the secondary opening 14 with the meshing portion 41 of the worm 40, so that the rotation of the worm 40 is smoother, and the outer shell 10 can position the second wear-resistant section 52 in the circumferential direction to improve the connection reliability between the second sleeve 50 and the outer shell 10.

[0045] In some embodiments, Figure 1 As shown, the worm 40 has a connecting groove 43, the opening of which is located at the end surface of one of the rod necks 42, and is used to connect with the driving member; the housing 10 has a main opening 12, and the openings of the main opening 12 and the connecting groove 43 are located on the same side of the housing 10. Specifically, the connecting groove 43 is used to connect with the driving device to rotate the worm 40; the worm wheel 20 meshes with the meshing portion 41 of the worm 40 through the external tooth portion 21, and meshes with the lead screw through the internal tooth portion 23, so that the worm wheel 20 can move along the lead screw under the drive of the worm 40.

[0046] It is understandable that the openings of the main opening 12 and the connecting groove 43 are located on the same side of the shell 10, so that the main opening 12 faces the drive device; and the other side of the shell 10 opposite to the side where the main opening 12 is provided is closed, that is, the main accommodating chamber 11 is isolated from the outside world by the shell 10. Thus, while the thickness of the mount driver is reduced by providing the main opening 12, the risk of external interference to the seat intelligent adjustment transmission unit is reduced. Specifically, compared with the main openings provided on both sides, in this embodiment, only the main opening 12 is provided on the side facing the drive device, which is conducive to reducing dust, particles, etc. from entering the main accommodating chamber 11, thereby making the transmission of the worm 40 and the worm wheel 20 smoother, and at the same time reducing the wear of the worm wheel 20 and the worm 40, which is conducive to extending the service life of the seat intelligent adjustment transmission unit.

[0047] In some embodiments, Fig.10 As shown, the seat intelligent adjustment transmission unit also includes a shock absorber 60, which is installed at the opposite ends of the outer shell 10 along the axial direction of the worm gear 20. When the seat intelligent adjustment transmission unit moves to the end of the stroke, the shock absorber 60 can play a role in buffering, shock absorption and noise reduction, which is beneficial to reduce the risk of damage to the seat intelligent adjustment transmission unit due to impact, further extend the service life of the seat intelligent adjustment transmission unit, and at the same time help to improve the comfort of the car seat.

[0048] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A seat intelligent adjustment transmission unit, comprising a worm wheel, a worm, and a housing for accommodating the worm wheel and the worm in a relatively rotatable manner, characterized in that: The middle area of ​​the shell has a main accommodating chamber for accommodating the worm wheel, and the upper part of the main accommodating chamber has a secondary accommodating chamber for accommodating the worm, and the main accommodating chamber and the secondary accommodating chamber are connected so that the worm wheel and the worm can mesh with each other; at least one side of the main accommodating chamber is provided with a main opening to connect the main accommodating chamber with the outside world, and at least part of the worm wheel is located in the main opening.

2. The seat intelligent adjustment transmission unit according to claim 1, characterized in that: The worm wheel comprises an outer tooth portion for meshing with the worm, the radius of the outer tooth portion is d1, and the width of the main opening is K Z , satisfying: K Z ≤2d1.

3. The seat intelligent adjustment transmission unit according to claim 2, characterized in that: The outer tooth portion is accommodated in the housing, and the minimum distance from the outer tooth portion to the outer wall of the main opening is H Z , satisfying: 0≤H Z ≤1mm.

4. The seat intelligent adjustment transmission unit according to claim 3, characterized in that: The worm gear also includes a journal neck located at both ends of the outer tooth portion; the seat intelligent adjustment transmission unit also includes a first sleeve, the first sleeve includes a first support section and a first wear-resistant section arranged in sequence along the axial direction, when the first sleeve is sleeved on the journal neck, the first support section is suitable for supporting the worm gear to rotate relative to the outer shell, and the first wear-resistant section is located between the outer tooth portion of the worm gear and the outer shell; the axial length of the outer tooth portion is L1, the axial length of the first wear-resistant section is T1, and the length of the main opening is L Z , satisfying: L1≤L Z ≤L1+2T1.

5. The seat intelligent adjustment transmission unit according to claim 1, characterized in that: A secondary opening is provided on a side of the secondary accommodating chamber away from the main accommodating chamber to connect the secondary accommodating chamber with the outside, so that at least a part of the worm is located in the secondary opening.

6. The seat intelligent adjustment transmission unit according to claim 5, characterized in that: The worm includes a meshing portion for meshing with the worm wheel, the meshing portion protrudes from the housing through the secondary opening, the radius of the meshing portion is d2, and the distance from the axis of the worm to the outer wall of the secondary opening is H F , satisfying: H F ≤d2.

7. The seat intelligent adjustment transmission unit according to claim 6, characterized in that: The width of the secondary opening is K F , satisfying: K F ≤2d2.

8. The seat intelligent adjustment transmission unit according to claim 6, characterized in that: The worm also includes a rod neck portion located at both ends of the meshing portion; the seat intelligent adjustment transmission unit also includes a second shaft sleeve, the second shaft sleeve includes a second supporting section and a second wear-resistant section arranged in sequence along the axial direction, when the second shaft sleeve is sleeved on the rod neck portion, the second supporting section is suitable for supporting the worm to rotate relative to the housing, and the second wear-resistant section is located between the meshing portion of the worm and the housing; the axial length of the meshing portion is L2, the axial length of the second wear-resistant section is T2, and the length of the secondary opening is L F , satisfying: L2≤L F ≤L2+2T2.

9. The seat intelligent adjustment transmission unit according to any one of claims 1 to 8, characterized in that: The worm has a connecting groove, the opening of which is located at the end surface of one of the rod necks for connecting with a driving member; the housing has a main opening, the main opening and the opening of the connecting groove are located on the same side of the housing.

10. The seat intelligent adjustment transmission unit according to any one of claims 1 to 8, characterized in that: The seat intelligent adjustment transmission unit further comprises a shock absorbing component, which is mounted at two opposite ends of the housing along the axial direction of the worm.

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