Gear box, electric sliding rail system comprising gear box and seat

Abstract

The utility model provides a gearbox, an electric sliding rail system comprising the gearbox and a seat. The electric sliding rail system comprises electric sliding rails located on the two sides of the width direction respectively, and each electric sliding rail comprises an upper rail, a lower rail and a lower rail, the lower rail is located below the upper rail in the height direction, the upper rail is connected with the lower rail in a matched mode, and the upper rail can move in the length direction relative to the lower rail; the driving assembly is fixedly connected with the upper rail, and the driving assembly comprises a driving motor, a transmission shaft and a gear box which are sequentially distributed in the length direction; the gearbox comprises a gear set and a shell, and the gear set is located in a mounting space defined by the shell. The gear set comprises an input gear and an output gear, the input gear is located on the upper portion of the gear box, the output gear is located on the lower portion of the gear box, and the input gear and the output gear are arranged in line in the height direction.

Description

Technical Field

[0001] The present application relates to a gearbox, as well as an electric slide rail system and a seat including the same. Background Art

[0002] In a seat, such as Figure 1 shown, for example, in a vehicle seat 100, there may be a slide rail mechanism, such as an electric slide rail system 10. The lower rail 12 of the electric slide rail system 10 generally cooperates with the installation ground 200 where the seat 100 is located. The electric slide rail system 10 can be used to adjust the front-back position of the seat in the length direction so that the seat is suitable for the occupant to sit on and does not block the driver's view of the rearview mirror. When the seat is not needed, the seat can also be adjusted as far forward as possible to expand the rear space, improve the comfort of the rear passengers, or provide more storage space in the vehicle to place more items.

[0003] Referring to Figure 2A , in one solution of the current electric slide rail system, such as Figure 2A the electric slide rail 10a shown, a single-motor solution is adopted where the slide rails on both sides in the width direction share a driving motor 131a. The inventor found that the problems faced in this way include that since the rotation axis of the driving motor is in the length direction and the moving direction of the slide rail is in the length direction, and the two are perpendicularly arranged, a worm drive needs to be adopted at the input end of the gearbox 133a, resulting in low space utilization rate of the entire seat slide rail. And the transmission method of the worm and helical teeth increases the transmission ratio of the entire transmission system. In order to meet the speed requirements for the front-back sliding of the seat slide rail, a relatively high motor speed is required, which is not conducive to the NVH performance of the seat.

[0004] In addition, in the dust-proof structure design, in order to prevent foreign objects from falling into the lower rail, flexible strips (rubber strips) are connected to both sides of the gearbox provided on the upper rail in the width direction for sealing. For a long slide rail, the length of the lower rail is longer and there are more frictional contacts with the driver, so the risk of wear of the rubber strips is greater. In the current solution, in order to reduce friction, the opening between the rubber strips on both sides is relatively large, which is not conducive to ensuring that foreign objects do not fall into the slide rail.

[0005] Referring again to, such as Figure 2B shown, in another solution of the current electric slide rail system, such as Figure 2B the electric slide rail 10b shown, a dual-motor solution is adopted where motors are provided on both slide rails. Since the structures on both sides are the same, Figure 2B only the structure on one side is shown. In the current dual-motor solution, the driving motor 131b is arranged along the height direction, so the motor occupies more height space under the seat, making it inconvenient to arrange the space of the seat.

[0006] Therefore, there is a need in the art for an electric slide rail system with a gearbox and a seat including the same to overcome at least one of the technical problems of the above comparative solutions. SUMMARY OF THE INVENTION

[0007] An object of the present application is to provide an electric slide rail system with a gearbox.

[0008] Another object of the present application is to provide a gearbox.

[0009] Another object of the present application is to provide a seat.

[0010] An electric slide rail system with a gearbox according to a first aspect of the present application includes: electric slide rails respectively located on both sides in the width direction, wherein each electric slide rail includes: an upper rail; a lower rail located below the upper rail in the height direction, the upper rail and the lower rail are cooperatively connected, and the upper rail can be displaced relative to the lower rail in the length direction; a driving assembly fixedly connected to the upper rail, the driving assembly includes a driving motor, a transmission shaft, and a gearbox sequentially distributed in the length direction; the gearbox includes a gear set and a housing, the gear set is located inside the installation space defined by the housing; the gear set includes an input gear and an output gear, the input gear is located at the upper part of the gearbox, the output gear is located at the lower part of the gearbox, the input gear and the output gear are arranged in a straight line in the height direction, the input gear rotates around a first rotation axis, and the output gear rotates around a second rotation axis; wherein, the setting direction of the driving motor is that the axis of the driving motor is arranged along the length direction, the rotational movement output by the driving motor is transmitted to the input gear through the transmission shaft and then transmitted to the output gear for output, the first rotation axis, the axis of the driving motor, and the axis of the transmission shaft are substantially coincident, parallel or the included angle is within ±10°, and the first rotation axis is parallel to the second rotation axis.

[0011] For the technical solution of the electric slide rail introduced above, by adopting the structure of a dual motor, and arranging the driving motor, the transmission shaft, and the gearbox of the driving assembly sequentially in the length direction, and the setting direction of the driving motor is that the axis of the driving motor is arranged along the length direction, the motor can be arranged parallel to the slide rail, so that the driving assembly makes full use of the space in the length direction occupied by the slide rail assembly itself. Moreover, the input gear and the output gear of the gear set of the gearbox are distributed in a straight line in the height direction and can both be helical gears. Helical gear transmission reduces the input end transmission ratio, thereby reducing the transmission ratio of the entire system. Under the condition of the same speed, the requirement for the rotational speed of the motor also decreases, thus optimizing the NVH performance of the entire system.

[0012] In one or more embodiments of the electric slide rail system described above, the output gear has an internal thread, and is in threaded engagement with the thread of the lead screw to drive the upper rail to be displaceable relative to the lower rail in the length direction.

[0013] In one or more embodiments of the electric slide rail system described above, both the input gear and the output gear are helical gears.

[0014] In one or more embodiments of the electric slide rail system described above, the upper part of the gearbox is located on the upper rail, the lower part of the gearbox is located on the lower rail, the upper rail is provided with a flexible strip, and the flexible strip is located on both sides in the width direction of the upper part of the gearbox. The dimension of the upper part of the gearbox in the width direction is 15 mm to 20 mm.

[0015] A gearbox according to the second aspect of the present application, for use in the electric slide rail system described in the first aspect. The housing includes a body and an end cover. The body is a split plastic part, and the end cover is a metal part. The end cover is provided corresponding to the output end of the output gear. The end cover protrudes from the body in the length direction, and there is a plastic-coated structure around the end cover. The plastic-coated structure is integrally connected to the body.

[0016] In one or more embodiments of the gearbox described above, the body includes a split first part and a second part. The first part and the second part are connected in the width direction by a laser welding line to form the body.

[0017] In one or more embodiments of the gear described above, the gear set further includes at least one intermediate gear. The intermediate gear is located between the input gear and the output gear in the height direction and is arranged in line. The housing is integrally formed with a positioning shaft, and the intermediate gear rotates around the positioning shaft.

[0018] A gearbox according to the third aspect of the present application, for use in the electric slide rail system described in the first aspect. The housing is a metal part. The housing includes a split first part and a second part. The first part and the second part are connected in the width direction by fastening connectors to form the housing.

[0019] In one or more embodiments of the gearbox described above, the center distance between the input gear and the output gear in the height direction is 30 mm to 50 mm, and the transmission ratio is 2 to 5.

[0020] A seat according to the second aspect of the present application, including the electric slide rail system as described in the first aspect. The lower rail is matched with the installation ground where the seat is located.

[0021] The beneficial effects of the above embodiments include, but are not limited to, adopting the electric slide rail system introduced in the first aspect, which can improve the NVH performance of the seat, enhance the user experience, and is easy to arrange in space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features, properties, and advantages of the present application will become more apparent from the following description in conjunction with the drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are only examples and are not drawn under the condition of equal proportions, and should not be used to limit the actual scope of protection required by the present application, where:

[0023] Figure 1 Schematic diagram of a seat in an embodiment.

[0024] Figure 2A 、 Figure 2B Schematic diagrams of the structures of electric slide rail systems of one and another comparative scheme respectively.

[0025] Figure 3 Schematic diagram of the structure of an electric slide rail system in an embodiment.

[0026] Figure 4 Schematic diagram of the internal gear arrangement of a gearbox in an embodiment.

[0027] Figure 5 Schematic diagram of the housing and intermediate gear of a gearbox in an embodiment.

[0028] Figure 6 Schematic diagram of the structure of the area near the end cover of a gearbox in an embodiment.

[0029] Reference Numerals:

[0030] 1000 - Vehicle

[0031] 100 - Seat

[0032] 200 - Ground

[0033] 10, 10a, 10b - Electric Slide Rail System

[0034] 11 - Upper Rail

[0035] 12 - Lower Rail

[0036] 13 - Driving Assembly

[0037] 131, 131a, 131b - Driving Motor

[0038] 1311 - Axis of the Driving Motor

[0039] 132 - Transmission Shaft

[0040] 133, 133a - Gearbox

[0041] 1331 - Upper part of the gearbox

[0042] 1332 - Lower part of the gearbox

[0043] 134 - Gear set

[0044] 1341 - Input gear

[0045] 13410 - First axis of rotation

[0046] 1342 - Output gear

[0047] 13420 - Second axis of rotation

[0048] 13421 - Internal thread

[0049] 1343 - Intermediate gear

[0050] 135 - Housing

[0051] 1351 - Body

[0052] 1352 - End cover

[0053] 1353 - Plastic - coated structure

[0054] 13511 - First part

[0055] 13512 - Second part

[0056] 13513 - Laser welding line

[0057] 13514 - Positioning shaft

[0058] 14 - Flexible strip. [[ID=P58]]Detailed implementation manners

[0059] Now, reference will be made in detail to the various embodiments of the present application. Examples of these embodiments are shown in the drawings and described as follows. Although the present application will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present application to those exemplary embodiments. On the contrary, the present application is intended to cover not only these exemplary embodiments, but also various alternative forms, modifications, equivalents, and other embodiments that may be included within the spirit and scope of the present application as defined by the appended claims.

[0060] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, upright, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0061] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand the present application not only through the actual terms used, but also through the meaning implied by each term.

[0062] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment" and / or "an embodiment" mean a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" mentioned twice or more at different positions in this specification is not necessarily the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of the present application can be combined appropriately.

[0063] Although the electric slide rail system 10 with a gearbox disclosed in the embodiments of the present application is applicable to automotive seats to achieve advantages such as easy space layout of the seats, low cost, and good NVH performance, it is not limited thereto. For example, it can be applicable to application scenarios of other transportation means, such as heavy vehicles, railway trains, ships, and can also be applicable to fixed places, such as conference halls, auditoriums, cinemas, etc.

[0064] It should be noted that in the following description, the length direction, width direction, and height direction are, for example, the X, Y, and Z directions shown in the drawings, and can also be referred to as the longitudinal direction, lateral direction, and vertical direction, and are not limited thereto.

[0065] Such as Figure 1As shown, the seat system 100 of a vehicle 1000, such as a car, includes a seat 100 and an electric slide rail system 10 which will be introduced in detail in the following embodiments. The lower rail 12 of the electric slide rail system 10 cooperates with the installation ground 200 where the seat 100 is located. The electric slide rail system 10 can be used to adjust the front and rear position of the seat in the length direction so that the seat is suitable for the occupant to sit on and does not block the driver's view of the rearview mirror. When the seat is not needed, the seat can also be adjusted as far forward as possible to expand the rear space, improve the comfort of the rear passengers, or provide more storage space in the vehicle to place more items.

[0066] Referring to Figures 3 to 6 As shown, in some embodiments, the electric slide rail system 10 with a gearbox includes electric slide rails 1 respectively located on both sides in the width direction. Since the structures of the electric slide rails 1 on both sides are the same, only one side of the electric slide rail is taken as an example for introduction in the drawings.

[0067] Each electric slide rail 1 includes: an upper rail 11, a lower rail 12, and a drive assembly 13.

[0068] Among them, the lower rail 12 is located below the upper rail 11 in the height direction. The upper rail 11 is cooperatively connected with the lower rail 12, and the upper rail 11 can be displaced relative to the lower rail 12 in the length direction. The cooperative connection between the upper rail 11 and the lower rail 12 can adopt the common male-rail and female-rail cooperative structure in the art, which will not be elaborated here.

[0069] Continuing to refer to Figures 3 to 6As shown, the driving assembly 13 is fixedly connected to the upper track 11. The driving assembly 13 includes a driving motor 131, a transmission shaft 132, and a gearbox 133 that are sequentially distributed in the length direction. The gearbox 133 includes a gear set 134 and a housing 135. The gear set 134 is located inside the installation space defined by the housing 135. The gear set 134 includes an input gear 1341 and an output gear 1342. The input gear 1341 is located at the upper part 1331 of the gearbox, and the output gear 1342 is located at the lower part 1332 of the gearbox. The input gear 1341 and the output gear 1342 are arranged in a straight line in the height direction. The input gear 1341 rotates around the first rotation axis 13410, and the output gear 1342 rotates around the second rotation axis 13420. Among them, the setting direction of the driving motor 131 is such that the axis 1311 of the driving motor is arranged along the length direction. The rotational motion output by the driving motor 131 is transmitted to the input gear 1341 through the transmission shaft 132 and then output through the output gear 1342. The first rotation axis 13410, the axis 1311 of the driving motor, and the axis 1320 of the transmission shaft are substantially coincident, and the first rotation axis 13410 is parallel to the second rotation axis 13420. It can be understood that the first rotation axis 13410, the axis 1311 of the driving motor, and the axis 1320 of the transmission shaft are not limited to the coincident relationship shown in the figure, and can also be a parallel relationship, or can also be a positional relationship with an included angle within ±10° in space.

[0070] In some embodiments, as Figure 6 shown, the gears of the gear set 134 are generally helical gears, so that the radial gears of the gears can be further reduced, thereby reducing the size of the upper part 1331 of the gearbox in the width direction.

[0071] The meaning of the driving motor 131 is similar to its common meaning in the art, that is, it can include a single motor, or can also include a component in which a transmission mechanism is integrated at the output end of the motor, such as the so-called "reduction motor", etc., and is not limited thereto.

[0072] In some embodiments, the transmission shaft 132 is a flexible shaft. The transmission shaft 132 extends in the length direction, with one end connected to the output end of the driving motor 131 and the other end connected to the input gear of the gearbox 133. The meaning of the flexible shaft here is opposite to that of the rigid shaft, and the meaning of the flexible shaft is similar to its common meaning in the art, that is, the flexible shaft is a shaft with very little rigidity and elastic and can be freely bent for transmission.

[0073] The principle of driving the upper track 11 to displace longitudinally relative to the lower track 12 by the driving assembly 13 can refer to the well-known principle of driving by a lead screw motor. The output gear 1342 has an internal thread 13421, and the upper track 11 is driven to be able to displace longitudinally relative to the lower track 12 through the threaded fit of the internal thread 13421 and the thread of the lead screw. Such a driving structure is simple and reliable, but not limited thereto, and other driving structures can also be adopted. For example Figure 3 As shown, the driving motor 131, the transmission shaft 132, and the upper part 1331 of the gearbox are located on the upper track 11, and the lower part 1332 of the gearbox and the lead screw are accommodated in the lower track 12. Therefore, in Figure 3 it is non-visible.

[0074] The beneficial effects of adopting the above embodiments are as follows. By adopting the structure of a dual motor, and arranging the driving motor, the transmission shaft, and the gearbox of the driving assembly in sequence in the longitudinal direction, and setting the direction of the driving motor so that the axis of the driving motor is arranged along the longitudinal direction, the motor can be arranged parallel to the slide rail, enabling the driving assembly to make full use of the space in the longitudinal direction occupied by the slide rail assembly itself. Moreover, the input gear and the output gear of the gear set of the gearbox are distributed in a straight line in the height direction, and they can both be helical gears. Helical gear transmission reduces the input transmission ratio, thereby reducing the transmission ratio of the entire system. Under the condition of the same speed, the requirement for the rotational speed of the motor also decreases, thus optimizing the NVH performance of the entire system.

[0075] Referring to Figures 4 to 6 As shown, in some embodiments, the structure of the housing 135 can be that the housing 135 includes a body 1351 and an end cover 1352. The body 1351 is a split plastic part, and the end cover 1352 is a metal part. The end cover 1352 is arranged corresponding to the output end of the output gear. The end cover 1352 protrudes from the body 1351 in the longitudinal direction, and there is a plastic-coated structure 1353 on the periphery of the end cover 1352. The plastic-coated structure 1353 is integrally connected to the body 1351. The beneficial effect of this is that the output end gear train is positioned by the metal end cover, and the metal end cover and the plastic housing are combined by plastic coating. The plastic coating design not only improves the stress strength of the output end but also avoids replacing the entire housing 135 with a metal material due to strength problems. By adopting the scheme of combining a plastic body with a metal end cover, while ensuring strength, the cost of the gearbox is also saved.

[0076] Continuing to refer to Figures 4 to 6 As shown, in some embodiments, for the plastic body, in some embodiments, the body 1351 includes a split first part 13511 and a second part 13512. The first part 13511 and the second part 13512 are connected by, for example Figure 4The laser welding line 13513 shown is connected in the width direction to form the body 1351. The beneficial effects are as follows: The plastic housings are connected by laser welding. This method ensures strength while enhancing the sealing performance between the upper and lower housings, better preventing oil leakage. At the same time, this method makes full use of the end face part of the housing, saving the space of the housing.

[0077] Continue to refer to Figures 4 to 6 As shown, in some embodiments, the gear set 134 further includes at least one intermediate gear 1343. The intermediate gear 1343 is located between the input gear 1341 and the output gear 1342 in the height direction and is arranged in line; the housing 135 is integrally formed with a positioning shaft 13514, and the intermediate gear 1343 rotates around the positioning shaft 13514. The meaning of the intermediate gear 1343 here is similar to that of an idler gear well-known in the art. That is, an idler gear refers to a gear that plays a transmission role between two non-contact transmission gears, meshing with both of these gears at the same time, only changing the rotation direction and not changing the transmission ratio, and is called an idler gear. As Figure 4 shown, the number of intermediate gears 1343 can be two. The intermediate gears 1343 are also located in the upper part 133 of the gearbox. The radial dimension of the intermediate gear 1343 is similar to that of the input gear 1341, and both are smaller than the output gear 1342. The number of intermediate gears 1343 can be relatively small or even eliminated to meet the requirement of a smaller center distance as much as possible. The structure of the positioning shaft integrally formed with the housing not only ensures the positioning of the gears, but also reduces the cost of the gearbox and is convenient for assembly.

[0078] In other embodiments, the housing 135 is a metal part. The housing 135 includes a separate first part 13511 and a second part 13512. The first part 13511 and the second part 13512 are connected in the width direction by fastening connectors to form the housing 135. The fastening connectors can be common fastening connectors such as rivets, screws, and pins, which will not be elaborated here. It can be understood that compared with the plastic housing, although the metal part has a higher cost, its strength is higher and it is more suitable for situations with a larger driving force.

[0079] It can be understood that by adopting the structure of the gearbox in the above embodiments, the center distance between the input gear 1341 and the output gear 1342 in the height direction can be 30 mm to 50 mm, and the transmission ratio can be 2 to 5, thereby reducing costs and optimizing the NVH performance.

[0080] In addition, in some embodiments, the upper track and the lower track adopt a structure sealed by a flexible strip 14 (such as a rubber strip), that is, the upper part 1331 of the gearbox is located on the upper track 11, and the lower part 1332 of the gearbox is located on the lower track 12. The upper track 11 is provided with a flexible strip 14, and the flexible strip 14 is located on both sides of the upper part 1331 of the gearbox in the width direction. By adopting the structure of the gearbox in the above embodiments, the size of the upper part 1331 of the gearbox in the width direction can be 15 mm to 20 mm, which can further reduce the opening size between the flexible strips 14 and reduce friction, so as to avoid foreign objects from falling into the slide rail as much as possible on the basis of ensuring the service life of the flexible strip.

[0081] In summary, the beneficial effects of the gearbox, the electric slide rail system and the seat introduced in the above embodiments include, but are not limited to, by adopting the structure of a double motor, and arranging the driving motor, the transmission shaft and the gearbox of the driving assembly in sequence in the length direction, and the setting direction of the driving motor is that the axis of the driving motor is arranged along the length direction, and the motor can be arranged parallel to the slide rail, so that the driving assembly makes full use of the space in the length direction occupied by the slide rail assembly itself. Moreover, the input gear and the output gear of the gear set of the gearbox are distributed in a straight line in the height direction, and they can both be helical gears. Helical gear transmission reduces the input transmission ratio, thereby reducing the transmission ratio of the entire system. Under the condition of the same speed, the requirement for the rotational speed of the motor also decreases, thereby optimizing the NVH performance of the entire system.

[0082] Although this application is disclosed above with preferred embodiments, it is not intended to limit this application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of this application. Therefore, any modification, equivalent change and decoration made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. An electric slide rail system (10) having a gearbox, characterized in that, Comprising: Electric slide rails (1) respectively located on both sides in the width direction. Each electric slide rail (1) includes: An upper rail (11); A lower rail (12), located below the upper rail (11) in the height direction. The upper rail (11) is cooperatively connected with the lower rail (12), and the upper rail (11) can be displaced relative to the lower rail (12) in the length direction; A drive assembly (13), fixedly connected to the upper rail (11). The drive assembly (13) includes a drive motor (131), a transmission shaft (132), and a gearbox (133) sequentially distributed in the length direction. The gearbox (133) includes a gear set (134) and a housing (135). The gear set (134) is located inside the installation space defined by the housing (135); The gear set (134) includes an input gear (1341) and an output gear (1342). The input gear (1341) is located at the upper part (1331) of the gearbox, and the output gear (1342) is located at the lower part (1332) of the gearbox. The input gear (1341) and the output gear (1342) are arranged in a straight line in the height direction. The input gear (1341) rotates around a first rotation axis (13410), and the output gear (1342) rotates around a second rotation axis (13420); Wherein, the setting direction of the drive motor (131) is that the axis (1311) of the drive motor is arranged along the length direction. The rotational motion output by the drive motor (131) is transmitted to the input gear (1341) through the transmission shaft (132) and then output through the output gear (1342). The first rotation axis (13410), the axis (1311) of the drive motor, and the axis (1320) of the transmission shaft coincide, are parallel, or the included angle is within ±10°. The first rotation axis (13410) is parallel to the second rotation axis (13420).

2. The electric slide rail system (10) according to claim 1, characterized in that, The output gear (1342) has an internal thread (13421). Through the thread fit of the internal thread (13421) with the thread of the lead screw, the upper rail (11) can be driven to be displaced relative to the lower rail (12) in the length direction.

3. The electric slide rail system (10) according to claim 1, wherein, Both the input gear (1341) and the output gear (1342) are helical gears.

4. The electric slide rail system (10) according to claim 1, characterized in that, The upper part (1331) of the gearbox is located on the upper rail (11), and the lower part (1332) of the gearbox is located on the lower rail (12). The upper rail (11) is provided with a flexible strip (14). The flexible strip (14) is located on both sides of the upper part (1331) of the gearbox in the width direction. The dimension of the upper part (1331) of the gearbox in the width direction is 15 mm to 20 mm.

5. A gearbox (133), characterized in that, For the electric slide rail system (10) according to any one of claims 1-4, the housing (135) includes a body (1351) and an end cover (1352). The body (1351) is a split plastic part, and the end cover (1352) is a metal part. The end cover (1352) is arranged corresponding to the output end of the output gear. The end cover (1352) protrudes from the body (1351) in the length direction, and a plastic coating structure (1353) is provided on the periphery of the end cover (1352), and the plastic coating structure (1353) is integrally connected to the body (1351).

6. The gearbox (133) according to claim 5, characterized in that, The body (1351) includes a split first part (13511) and a second part (13512). The first part (13511) and the second part (13512) are connected in the width direction by a laser welding line (13513) to form the body (1351).

7. The gearbox (133) according to claim 5, characterized in that, The gear set (134) further includes at least one intermediate gear (1343). The intermediate gear (1343) is located between the input gear (1341) and the output gear (1342) in the height direction and is arranged in series. The housing (135) is integrally formed with a positioning shaft (13514), and the intermediate gear (1343) rotates around the positioning shaft (13514).

8. A gearbox (133), characterized in that, For the electric slide rail system (10) according to any one of claims 1-4, the housing (135) is a metal part. The housing (135) includes a split first part (13511) and a second part (13512). The first part (13511) and the second part (13512) are connected in the width direction by fastening connectors to form the housing (135).

9. The gearbox (133) according to any one of claims 5 or 8, characterized in that, The center distance in the height direction between the input gear (1341) and the output gear (1342) is 30 mm to 50 mm, and the transmission ratio is 2 to 5.

10. A seat (100), characterized in that, Adapted to the electric slide rail system (10) according to any one of claims 1-4, the lower rail (12) cooperates with the installation ground (200) where the seat (100) is located.

Images