Slide rail assembly and reduction gearbox of slide rail assembly

Abstract

The sliding rail assembly comprises a lead screw (3000), the reduction gearbox (1000) comprises an outer shell (1100) and a speed reduction transmission mechanism (1200), the outer shell (1100) comprises a transverse shell part (1000A) and an avoiding shell part (1000B), the transverse shell part (1000A) and the avoiding shell part (1000B) are arranged in an included angle mode, the speed reduction transmission mechanism (1200) comprises an input wheel component (1210), a transmission wheel component (1220) and an output wheel component (1230), and the transmission wheel component (1220) and the output wheel component (1230) are arranged on the input wheel component (1210). The input wheel part (1210) and the transmission wheel part (1220) are both installed on the avoiding shell part (1120), the output wheel part (1230) is installed on the transverse shell part (1000A), the input wheel part (1210) is in transmission connection with the output wheel part (1230) through the transmission wheel part (1220), the output wheel part (1230) is arranged on the lead screw (3000) in a sleeving mode, and the output wheel part (1230) is in transmission connection with the lead screw (3000). The avoiding shell part of the reduction gearbox can avoid the space above the lead screw, and interference with a protection component above the lead screw can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a slide rail assembly and a reduction gearbox for the slide rail assembly. The slide rail assembly can be applied in a vehicle to adjust the installation position of the seat body inside the vehicle. Background Technology

[0002] The slide rail assembly includes a slide rail component and a drive component. The slide rail component comprises an upper rail assembly and a lower rail assembly. The upper rail assembly is connected to the seat body, while the lower rail assembly is connected to the vehicle floor via screws or other fasteners. The drive component includes a drive motor, a gearbox, and a lead screw. The lead screw is fixed inside the lower rail assembly, and the gearbox is connected to the upper rail assembly. The drive motor is driven by the gearbox and the lead screw. Thus, when the drive motor starts, the gearbox moves the upper rail assembly along the lead screw, thereby adjusting the installation position of the seat body.

[0003] In related technologies, gearboxes are typically rectangular in shape, consisting of a lower end and an upper end. The lower end connects to the lead screw, while the upper end is located directly above the lower end, i.e., directly above the lead screw. In this case, if a protective component, such as a dustproof strip, is installed directly above the lead screw, interference will occur between the upper end and the protective component when the gearbox moves along the lead screw.

[0004] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects remains a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a slide rail assembly and a reduction gearbox for the slide rail assembly. The reduction gearbox includes a transverse housing and a clearance housing. The clearance housing can avoid the space above the lead screw, thus avoiding interference with the protective components above the lead screw.

[0006] To solve the above-mentioned technical problems, this utility model provides a reduction gearbox for a slide rail assembly. The slide rail assembly includes a lead screw, and the reduction gearbox includes a housing and a reduction transmission mechanism. The housing includes a transverse housing portion and a clearance housing portion, which are arranged at an included angle. The reduction transmission mechanism includes an input wheel component, a transmission wheel component, and an output wheel component. The input wheel component and the transmission wheel component are both mounted on the clearance housing portion, and the output wheel component is mounted on the transverse housing portion. The input wheel component is drivenly connected to the transmission wheel component and the output wheel component. The output wheel component is sleeved on the lead screw, and the output wheel component is drivenly connected to the lead screw.

[0007] With the above-described design, an output wheel component is housed within the transverse housing. This output wheel component can be sleeved onto the lead screw, meaning the transverse housing can be sleeved onto the lead screw. The clearance housing and the transverse housing can be angled together, allowing the clearance housing to avoid obstructing the space above the lead screw. Thus, when a protective component is installed above the lead screw, the gearbox will essentially not interfere with the protective component, facilitating its installation and providing reliable protection for the lead screw.

[0008] Optionally, the outer casing includes a split first casing and a second casing, which are connected to each other along the axial direction of the lead screw. Both the first casing and the second casing include a transverse shell section and a clearance shell section arranged at an angle. The two transverse shell sections are combined to form the transverse shell portion, and the two clearance shell sections are combined to form the clearance shell portion.

[0009] Optionally, the input wheel component includes an input wheel body and two first bushings, the two first bushings being disposed at both axial ends of the input wheel body; the first housing is provided with two first grooves, the second housing is provided with two second grooves, the two first grooves being able to respectively engage with the two second grooves to form two receiving holes, and the two first bushings being respectively installed in the two receiving holes.

[0010] Optionally, the transmission wheel component includes a transmission wheel body and two rolling bearings, the two rolling bearings being respectively disposed at both axial ends of the transmission wheel body, each rolling bearing including an inner ring and an outer ring, with bearing clearance between the inner ring and the outer ring; and / or, the output wheel component includes an output wheel body, two thrust bearings and two second bushings, the two thrust bearings being respectively disposed at both axial ends of the output wheel body, the two second bushings being respectively disposed on the side of the two thrust bearings away from the output wheel body, and the output wheel component and the housing being disposed with axial clearance along the lead screw.

[0011] Optionally, the housing is provided with a positioning hole, the slide rail assembly includes an upper rail component, the upper rail component is provided with a positioning pin, the positioning hole is used to insert with the positioning pin, and the positioning hole and the positioning pin are in a radial clearance fit.

[0012] Optionally, at least one of the input wheel body of the input wheel component and the transmission wheel body of the transmission wheel component is made of plastic; and / or, the output wheel body of the output wheel component is made of one of copper alloy, wear-resistant steel, free-cutting steel, or plastic-metal multilayer composite material.

[0013] Optionally, it also includes a shock-absorbing component, which includes a top shock absorber and two side shock absorbers. The top shock absorber is disposed at the upper end of the housing, and the two side shock absorbers are respectively disposed at both ends of the housing along the axial direction of the lead screw.

[0014] Optionally, one of the side damper and the housing is provided with a protrusion, and the other of the side damper and the housing is provided with a recess, wherein the protrusion can be inserted into the recess; and / or, the outer wall surfaces of the top damper and the side damper are both provided with slots; and / or, the top damper is provided with a clearance groove, wherein the clearance groove can avoid the axial ends of the input wheel component.

[0015] This utility model embodiment also provides a slide rail assembly, including a slide rail component, a reduction gearbox, a lead screw, and a protective component. The slide rail component includes an upper rail component and a lower rail component. The lead screw is mounted on the lower rail component. The reduction gearbox is connected to the upper rail component. The protective component is connected to the lower rail component. The protective component includes a shielding portion located above the lead screw. The reduction gearbox is the reduction gearbox of the above-mentioned slide rail assembly. The clearance housing portion avoids the shielding portion in the lateral direction.

[0016] Optionally, it also includes a connector for installing and fixing the lower rail component. The connector includes a head located inside the lower rail component, and the head and the lead screw are offset laterally. Attached Figure Description

[0017] Figure 1 This is a partial structural diagram of a slide rail assembly provided in an embodiment of the present utility model;

[0018] Figure 2 This is a diagram showing the connection structure between the gearbox and the lead screw;

[0019] Figure 3 This is an exploded view of the gearbox;

[0020] Figure 4 An exploded view of the gearbox after the shock absorber components have been removed.

[0021] Figure label:

[0022] 1000 - Gearbox; 1100 - Housing; 1100A - Lateral housing section; 1100B - Clearance housing section; 1100C - Positioning hole; 1100D - Protrusion; 1110 - First housing; 1111 - First lateral housing section; 1112 - First clearance housing section; 1112A - First groove; 1120 - Second housing; 1121 - Second lateral housing section; 1122 - Second clearance housing section; 1122A - Second groove; 1200 - Gear reduction transmission mechanism; 121 0 - Input wheel assembly; 1211 - Input wheel body; 1212 - First bushing; 1220 - Transmission wheel assembly; 1221 - Transmission wheel body; 1222 - Rolling bearing; 1230 - Output wheel assembly; 1231 - Output wheel body; 1232 - Thrust bearing; 1233 - Second bushing; 1300 - Vibration damping component; 1300A - Recess; 1300B - Groove; 1300C - Clearance groove; 1310 - Top vibration damper; 1320 - Side vibration damper;

[0023] 2000 - Lower rail component; 2100 - Lower rail base plate; 2200 - Lower rail side plate; 2300 - Lower rail top plate; 2400 - Lower rail flange;

[0024] 3000-lead screw;

[0025] 4000 - Protective components; 4100 - Shielding parts;

[0026] 5000 - Connector; 5100 - Head; 5200 - Rod. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of the embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0030] The directional terms mentioned in the embodiments of this utility model, such as "inner" and "outer", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0031] In the description of embodiments of this utility model, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0032] In the description of this utility model embodiment, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Please refer to Figures 1-4 , Figure 1 This is a partial structural diagram of a slide rail assembly provided in an embodiment of the present utility model; Figure 2 This is a diagram showing the connection structure between the gearbox and the lead screw; Figure 3 This is an exploded view of the gearbox; Figure 4 An exploded view of the gearbox after the shock absorber components have been removed.

[0034] This utility model provides a slide rail assembly, which can be a motorized slide rail assembly, including a slide rail component and a drive component.

[0035] The slide rail assembly has an extending direction. In this embodiment of the utility model, the extending direction can be defined as longitudinal. In the mounting surface of the slide rail assembly, the direction perpendicular to the longitudinal direction can be defined as transverse, and the direction perpendicular to the mounting surface can be defined as vertical. The vertical direction is also called the up-down direction.

[0036] The slide rail assembly may include an upper rail component (not shown in the figure) and a lower rail component 2000. In some implementations, the slide rail assembly may include two slide rail assemblies, which may be arranged laterally at intervals to better support the seat body in a sliding manner, thereby improving the reliability of the seat body's installation and sliding displacement within the vehicle. Of course, in some other implementations of this utility model, the slide rail assembly may also include other numbers of slide rail assemblies, such as one slide rail assembly, three slide rail assemblies, etc.

[0037] In the slide rail assembly, the lower rail component 2000 is used to connect to the vehicle floor. Specifically, as shown... Figure 1 As shown, the lower rail component 2000 may include a lower rail base plate 2100, a lower rail side plate 2200, a lower rail top plate 2300, and a lower rail flange 2400. There may be two lower rail side plates 2200, which may be located on opposite sides of the lower rail base plate 2100. There may also be two lower rail top plates 2300, which may be connected to the two lower rail side plates 2200 respectively. Similarly, there may be two lower rail flanges 2400, which may be connected to the two lower rail top plates 2300 respectively.

[0038] The lower rail base plate 2100 can be connected to the vehicle floor via a connector 5000, such as screws. The connector 5000 may include a head 5100 and a rod 5200. The rod 5200 can be a threaded rod that passes through the lower rail base plate 2100 and connects to the vehicle floor. The head 5100 can be located inside the lower rail component 2000 and can abut against the lower rail base plate 2100 vertically, thereby connecting and fixing the lower rail component 2000. In this way, the connector 5000 is installed from the inside of the lower rail component 2000, reducing the installation space requirements on the vehicle body.

[0039] Combination Figure 1 During actual assembly, the head 5100 and the lead screw 3000 can be staggered in the lateral direction. This reduces installation interference between the head 5100 and the lead screw 3000, thereby facilitating the installation of the lower rail component 2000 and the lead screw 3000.

[0040] In the slide rail assembly, the upper rail component is used to connect with the seat body, and the specific connection method is not limited here.

[0041] The drive assembly includes a drive motor (not shown in the figure), a gearbox 1000, and a lead screw 3000. The gearbox 1000 can be connected to the upper rail component. The drive motor can be connected to the gearbox 1000 via a transmission shaft such as a flexible shaft, and the gearbox 1000 can be connected to the lead screw 3000. In this way, the gearbox 1000 can be displaced along the lead screw 3000 under the drive of the drive motor, thereby causing the upper rail component to move relative to the lower rail component 2000.

[0042] like Figures 1-3 As shown in the embodiment of this utility model, the gearbox 1000 includes a housing 1100 and a speed reduction transmission mechanism 1200.

[0043] The housing 1100 includes a transverse housing portion 1100A and a clearance housing portion 1100B. The transverse housing portion 1100A can extend generally laterally. The transverse housing portion 1100A and the clearance housing portion 1100B are arranged at an included angle. The reduction gear transmission mechanism 1200 includes an input wheel component 1210, a transmission wheel component 1220, and an output wheel component 1230. The input wheel component 1210 and the transmission wheel component 1220 are both mounted on the clearance housing portion 1100B. The output wheel component 1230 is mounted on the transverse housing portion 1100A. The input wheel component 1210 is drive-connected to the output wheel component 1230 via the transmission wheel component 1220. The output wheel component 1230 is sleeved on the lead screw 3000, and the output wheel component 1230 is drive-connected to the lead screw 3000.

[0044] Using the above scheme, an output wheel component 1230 is provided inside the transverse housing 1100A. The output wheel component 1230 can be sleeved onto the lead screw 3000, that is, the transverse housing 1100A can be sleeved onto the lead screw 3000. The clearance housing 1100B and the transverse housing 1100A can be arranged at an angle, so that the clearance housing 1100B can avoid the space above the lead screw 3000. In this way, when the protective component 4000 is installed above the lead screw 3000, the gearbox 1000 will basically not interfere with the protective component 4000, which facilitates the installation of the protective component 4000 and helps to build reliable protection for the lead screw 3000.

[0045] Here, this embodiment of the present invention does not limit the specific value of the included angle between the transverse shell portion 1100A and the avoidance shell portion 1100B. In practical applications, those skilled in the art can select the angle according to specific needs, as long as it meets the requirements of use. For example, the included angle can be 90 degrees, in which case the avoidance shell portion 1100B can extend approximately vertically. Alternatively, the included angle can be non-90 degrees, such as 80 degrees, 110 degrees, 120 degrees, 130 degrees, etc., as long as the avoidance shell portion 1100B can reliably avoid the protective component 4000. The boundary line between the transverse shell portion 1100A and the avoidance shell portion 1100B can be roughly referenced... Figure 1 The dashed line shown in the diagram.

[0046] See Figure 1 The protective component 4000 can be roughly T-shaped, including a top plate and a vertical plate. The vertical plate is used for installation with the lower rail component 2000; the specific installation method can be, for example, snap-fit, which is not limited here. The top plate has a shielding part 4100, which can be located on the upper side of the lead screw 3000, and can shield and protect the lead screw 3000, reducing the possibility of the lead screw 3000 being abnormally stepped on or contaminated by dust.

[0047] In some implementations, such as Figure 3 As shown, the housing 1100 may include a split first housing 1110 and a second housing 1120. The split design of the housing 1100 facilitates the installation or removal of the aforementioned speed reduction transmission mechanism 1200 within the housing 1100.

[0048] Specifically, the first housing 1110 and the second housing 1120 can be connected along the axial direction of the lead screw 3000, that is, they can be connected longitudinally. The connection method between the first housing 1110 and the second housing 1120 can be, for example, screw connection, snap-fit, riveting, etc., which is not limited here, as long as the reliability requirements of the connection can be met.

[0049] Both the first housing 1110 and the second housing 1120 may include a transverse shell segment and a clearance shell segment arranged at an included angle. For ease of description, the transverse shell segment and the clearance shell segment of the first housing 1110 may be referred to as the first transverse shell segment 1111 and the first clearance shell segment 1112, respectively, and the transverse shell segment and the clearance shell segment of the second housing 1120 may be referred to as the second transverse shell segment 1121 and the second clearance shell segment 1122, respectively. The first transverse shell segment 1111 and the second transverse shell segment 1121 can be combined to form the aforementioned transverse shell portion 1100A, and the first clearance shell segment 1112 and the second clearance shell segment 1122 can be combined to form the aforementioned clearance shell portion 1100B.

[0050] In some implementation methods, combined Figure 4 The input wheel component 1210 may include an input wheel body 1211 and two first bushings 1212. The input wheel body 1211 may specifically be a worm gear or the like, and the two first bushings 1212 may be disposed at both axial ends of the input wheel body 1211.

[0051] The first housing 1110 may be provided with two first grooves 1112A, and the second housing 1120 may be provided with two second grooves 1122A. After the first housing 1110 and the second housing 1120 are longitudinally connected, the two first grooves 1112A can be connected to the two second grooves 1122A respectively to form two receiving holes (not shown in the figure).

[0052] Two first bushings 1212 can be installed in two receiving holes respectively. The fit between the two first bushings 1212 and the receiving holes can be either an interference fit or a transition fit, which is not limited here. The two first bushings 1212 effectively eliminate the problem that the first groove 1112A and the second groove 1122A are not perfectly aligned after the first housing 1110 and the second housing 1120 are docked. This reduces or eliminates manufacturing errors, ensuring smooth rotation of the input wheel body 1211 and reducing rotational friction between the input wheel body 1211 and the outer housing 1100. Simultaneously, the two first bushings 1212 can also serve as installation positioning references, eliminating the problem of the two receiving holes not being perfectly concentric, thereby effectively eliminating rotational noise of the input wheel body 1211.

[0053] The aforementioned first bushing 1212 can be made of plastic or powder metallurgy, which can effectively reduce the weight of the vehicle and help achieve lightweighting.

[0054] In some implementations, such as Figure 4 As shown, the transmission wheel component 1220 may include a transmission wheel body 1221 and two rolling bearings 1222.

[0055] Two rolling bearings 1222 can be respectively disposed at both ends of the transmission wheel body 1221. Both the first housing 1110 and the second housing 1120 can be provided with a first receiving groove (not shown in the figure). The rolling bearings 1222 can be installed in the first receiving grooves of the first housing 1110 and the second housing 1120 using a clearance fit or transition fit, etc. Based on the aforementioned implementation method of the first housing 1110 and the second housing 1120 being separately disposed along the longitudinal direction, the first receiving groove of the first housing 1110 can be formed solely by the first housing 1110, and the first receiving groove of the second housing 1120 can also be formed solely by the second housing 1120. That is, the first receiving groove is not formed by splicing two semicircular grooves. Therefore, there is no problem of the two semicircular grooves being misaligned, thereby reducing errors and facilitating the reliable installation of the rolling bearings 1222 in the two first receiving grooves.

[0056] The rolling bearing 1222 may include an inner ring and an outer ring. There may be bearing clearance between the inner ring and the outer ring. The bearing clearance may include axial clearance and radial clearance, so that the inner ring can float and wobble relative to the outer ring to accommodate certain manufacturing errors. This can reduce the manufacturing precision requirements of the first housing 1110 and the second housing 1120, and help improve the transmission smoothness of the reduction gear mechanism 1200.

[0057] Here, the specific number of transmission wheel components 1220 is not limited in this embodiment. In practical applications, those skilled in the art can select according to specific needs, as long as the requirements of use are met. For example, the number of transmission wheel components 1220 can be at least two, and each transmission wheel component 1220 can be arranged vertically. This can raise the installation height of the input wheel component 1210, thereby facilitating the raising of the installation height of the drive motor and allowing for more space below the drive motor, which can better adapt to different usage scenarios. For example, in the scenario where the lower rail component 2000 is installed under the carpet in the vehicle, raising the drive motor can reduce the possibility of installation interference between the drive motor and the carpet.

[0058] In some implementations, the output wheel component 1230 may include an output wheel body 1231, two thrust bearings 1232, and two second bushings 1233.

[0059] Two thrust bearings 1232 can be respectively disposed at both ends of the output wheel body 1231, and two second bushings 1233 can be respectively disposed on the side of the two thrust bearings 1232 away from the output wheel body 1231. Both the first housing 1110 and the second housing 1120 can be provided with second receiving grooves (not shown in the figure). The thrust bearings 1232 and the second bushings 1233 can be installed in the second receiving grooves of the first housing 1110 and the second housing 1120 using clearance fit or transition fit methods. Based on the aforementioned implementation method of separating the first housing 1110 and the second housing 1120 along the longitudinal direction, the second receiving groove of the first housing 1110 can be formed solely by the first housing 1110, and the second receiving groove of the second housing 1120 can also be formed solely by the second housing 1120. That is, the second receiving groove is not formed by splicing two semi-circular grooves. Therefore, there is no problem of the two semi-circular grooves being misaligned, thereby reducing errors and facilitating the reliable installation of the rolling bearing 1222 in the two second receiving grooves.

[0060] The thrust bearing 1232 can reduce the end face sliding friction between the output wheel body 1231 and the second bushing 1233, thereby improving the smoothness of rotation of the output wheel body 1231.

[0061] The second bushing 1233 provides radial support to the output wheel body 1231 and also adjusts the axial installation clearance between the output wheel component 1230 and the housing 1100. In this embodiment of the invention, the second bushing 1233 allows the output wheel component 1230 and the housing 1100 to be spaced apart along the axial direction (i.e., longitudinal direction) of the lead screw 3000. This clearance can be, for example, between 0.05mm and 0.1mm, allowing the output wheel body 1231 to have a certain amount of floating, which can accommodate installation and manufacturing errors of the lead screw 3000 and improve the smoothness of the displacement of the output wheel body 1231 along the lead screw 3000.

[0062] In some implementations, at least one of the input wheel body 1211 of the input wheel component 1210 and the transmission wheel body 1221 of the transmission wheel component 1220 is made of plastic.

[0063] Taking the input wheel body 1211 as an example, when made of plastic, the input wheel body 1211 can be processed and formed using a one-piece injection molding process, which is more convenient and has relatively better tolerance to errors. Furthermore, plastic is lighter, which is more conducive to achieving lightweight vehicle design. At the same time, it can reduce collision noise and vibration during transmission, and also helps to improve the quality of the gearbox provided in this embodiment of the invention.

[0064] In practice, both the input wheel body 1211 and the transmission wheel body 1221 can be made of plastic. Alternatively, one of the input wheel body 1211 and the transmission wheel body 1221 can be made of metal to form a combined plastic and metal transmission. Furthermore, when there are more than two transmission wheel components 1220, the transmission wheel body 1221 of each transmission wheel component 1220 can be made entirely of plastic, or only a portion of the transmission wheel body 1221 of each transmission wheel component 1220 can be made of plastic.

[0065] In fact, in some other implementations of this utility model, both the input wheel body 1211 and the transmission wheel body 1221 can be made of metal, which is also feasible.

[0066] In some implementations, the output wheel body 1231 of the output wheel component 1230 can be made of copper alloy. Copper alloy has a relatively low coefficient of friction and relatively good wear resistance, which can reduce wear during transmission.

[0067] In addition, the output wheel component 1230 can also be made of one of wear-resistant steel, free-cutting steel, or plastic-metal multilayer composite materials.

[0068] In some implementations, the housing 1100 may also be provided with a positioning hole 1100C. Combined with... Figure 2 and Figure 3 In the outer casing 1100, both the first casing 1110 and the second casing 1120 may be provided with the aforementioned positioning hole 1100C.

[0069] The upper rail component may be equipped with a locating pin. Specifically, the upper rail component may be equipped with a mounting bracket, and the locating pin may be mounted on the mounting bracket. The locating hole 1100C of the housing 1100 can be used to insert the locating pin. Furthermore, the locating hole 1100C and the locating pin can be in a clearance fit in the radial direction, and the clearance can be between 1mm and 4mm, for example, 2mm. In this way, there can be a certain amount of floating between the gearbox 1000 and the mounting bracket to accommodate the manufacturing and installation errors of the lead screw 3000, while preventing large-angle rotation of the gearbox 1000 relative to the lead screw 3000.

[0070] In some implementations, the gearbox 1000 provided in this embodiment of the present invention may also include a shock-absorbing component 1300.

[0071] like Figure 2 and Figure 3 As shown, the vibration damping component 1300 may include a top vibration damper 1310 and two side vibration dampers 1320. The top vibration damper 1310 may be disposed at the upper end of the housing 1100 to eliminate the axial clearance between the top of the gearbox 1000 and the mounting bracket, thereby reducing noise between the top of the gearbox 1000 and the mounting bracket. The two side vibration dampers 1320 may be respectively disposed at both ends of the housing 1100 along the axial direction of the lead screw 3000, and the side vibration dampers 1320 may also be used to eliminate collision noise between the gearbox 1000 and other components.

[0072] Both the top damping component 1310 and the side damping component 1320 can be made of materials with a certain degree of flexibility and deformation, such as rubber.

[0073] The top shock absorber 1310 may be provided with a clearance groove 1300C. The clearance groove 1300C can avoid the axial ends of the input wheel component 1210. At the same time, the top shock absorber 1310 can also wrap around the axial ends of the input wheel component 1210 to a certain extent at the clearance groove 1300C, thereby reducing the noise of the input wheel component 1210 during transmission.

[0074] Combination Figure 4In the side damping component 1320 and the housing 1100, one can be provided with a protrusion 1100D, and the other can be provided with a recess 1300A. During actual assembly, the protrusion 1100D can be inserted into the recess 1300A to realize the installation and positioning of the side damping component 1320 in the housing 1100, and to reduce the possibility of the side damping component 1320 deforming due to interference compression during installation and interfering with the lead screw 3000.

[0075] The specific structural shapes of the protrusion 1100D and the recess 1300A are not limited here. In practical applications, those skilled in the art can design them according to specific needs, as long as they meet the requirements of use. For example, the cross-sections of the protrusion 1100D and the recess 1300A perpendicular to the longitudinal direction can be approximately rectangular.

[0076] The outer walls of both the top shock absorber 1310 and the side shock absorber 1320 can be provided with slots 1300B. On the one hand, the slots 1300B can reduce weight, thus facilitating vehicle lightweighting. On the other hand, the slots 1300B can enhance the deformability of the top shock absorber 1310 and the side shock absorber 1320, largely avoiding the problem of the top shock absorber 1310 and the side shock absorber 1320 being unable to deform effectively under contact compression, which would make it difficult to install the gearbox 1000; that is, the slots 1300B facilitate the installation of the gearbox 1000.

[0077] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A speed reducer for a slide rail assembly, the slide rail assembly comprising a screw rod (3000), characterized in that, The reduction gearbox (1000) comprises a housing (1100) and a reduction transmission mechanism (1200), the housing (1100) comprises a transverse shell part (1100A) and an escape shell part (1100B), the transverse shell part (1100A) and the escape shell part (1100B) are arranged at an angle, the reduction transmission mechanism (1200) comprises an input wheel part (1210), a transmission wheel part (1220) and an output wheel part (1230), the input wheel part (1210) and the transmission wheel part (1220) are both mounted on the escape shell part (1100B), the output wheel part (1230) is mounted on the transverse shell part (1100A), the input wheel part (1210) is drivingly connected through the transmission wheel part (1220) and the output wheel part (1230), the output wheel part (1230) is sleeved on the lead screw (3000), and the output wheel part (1230) and the lead screw (3000) are drivingly connected.

2. The gearbox of claim 1, wherein, The housing (1100) comprises a split first shell (1110) and a second shell (1120), the first shell (1110) and the second shell (1120) are opposite to each other along the axial direction of the lead screw (3000), the first shell and the second shell both comprise transverse shell segments and escape shell segments arranged at an angle, the two transverse shell segments combine to form the transverse shell part (1100A), and the two escape shell segments combine to form the escape shell part (1100B).

3. The gearbox of claim 2, wherein, The input wheel part (1210) comprises an input wheel body (1211) and two first bushings (1212), the two first bushings (1212) are arranged at the axial ends of the input wheel body (1211); The first shell (1110) is provided with two first groove bodies (1112A), the second shell (1120) is provided with two second groove bodies (1122A), the two first groove bodies (1112A) can be respectively opposite to the two second groove bodies (1122A) to form two containing holes, and the two first bushings (1212) are respectively mounted in the two containing holes.

4. The gearbox of claim 2, wherein, The transmission wheel part (1220) comprises a transmission wheel body (1221) and two rolling bearings (1222), the two rolling bearings (1222) are respectively arranged at the axial ends of the transmission wheel body (1221), the rolling bearing (1222) comprises an inner ring and an outer ring, and a bearing clearance exists between the inner ring and the outer ring; and / or, The output wheel component (1230) comprises an output wheel body (1231), two thrust bearings (1232) and two second bushings (1233), the two thrust bearings (1232) are respectively arranged at the axial two ends of the output wheel body (1231), and the two second bushings (1233) are respectively arranged on the side of the two thrust bearings (1232) away from the output wheel body (1231), and the output wheel component (1230) and the shell (1100) are arranged in the axial gap of the lead screw (3000).

5. The gearbox of claim 1, wherein, The shell (1100) is provided with a positioning hole (1100C), the slide rail assembly comprises an upper rail component provided with a positioning pin, the positioning hole (1100C) is used for inserting the positioning pin, and the positioning hole (1100C) and the positioning pin are in a radial clearance fit.

6. The gearbox of any one of claims 1-5, wherein, At least one of the input wheel body (1211) of the input wheel component (1210) and the transmission wheel body (1221) of the transmission wheel component (1220) is made of plastic; and / or, The material of the output wheel body (1231) of the output wheel component (1230) is one of copper alloy, wear-resistant steel, free-cutting steel and plastic metal multilayer composite material.

7. The gearbox of any one of claims 1-5, wherein, Further comprising a damping component (1300), the damping component (1300) comprises a top damping piece (1310) and two side damping pieces (1320), the top damping piece (1310) is arranged at the upper end of the shell (1100), and the two side damping pieces (1320) are respectively arranged at the axial two ends of the shell (1100) along the lead screw (3000).

8. The reduction gearbox of the slide rail assembly according to claim 7, wherein, One of the side damping piece (1320) and the shell (1100) is provided with a protruding portion (1100D), the other one of the side damping piece (1320) and the shell (1100) is provided with a recessed portion (1300A), and the protruding portion (1100D) can be inserted into the recessed portion (1300A); and / or, The outer wall surface of the top damping piece (1310) and the side damping piece (1320) is provided with a slot (1300B); and / or, The top damping piece (1310) is provided with an avoiding slot (1300C), and the avoiding slot (1300C) can avoid the axial two end portions of the input wheel component (1210).

9. A slide rail assembly, characterized by, The application relates to a slide rail assembly, a reduction box (1000), a screw rod (3000) and a protection component (4000), wherein the slide rail assembly comprises an upper rail component and a lower rail component (2000), the screw rod (3000) is installed on the lower rail component (2000), the reduction box (1000) is connected with the upper rail component, the protection component (4000) is connected with the lower rail component, the protection component (4000) comprises a shielding part (4100), the shielding part (4100) is located on the upper side of the screw rod (3000), the reduction box (1000) is the reduction box of the slide rail assembly in any one of claims 1-8, and the avoidance shell part (1100B) avoids the shielding part (4100) in the transverse direction.

10. The slide rail assembly as claimed in claim 9, wherein, The application further relates to a connecting piece (5000) for mounting and fixing the lower rail component (2000), wherein the connecting piece (5000) comprises a head part (5100), the head part (5100) is located on the inner side of the lower rail component (2000), and the head part (5100) and the screw rod (3000) are arranged in a transverse displacement mode.

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