Middle-mounted automobile seat sliding rail

Abstract

The invention discloses a mid-set type automobile seat sliding rail, and relates to the field of automobile seat sliding rails, the mid-set type automobile seat sliding rail comprises two sliding rail assemblies arranged in parallel, cross beams arranged on the sliding rail assemblies in a sliding mode and a driving part installed between the two cross beams, and the driving part drives the cross beams and the driving part to move in the length direction of the sliding rail assemblies; wherein the sliding rail assembly comprises a shell forming a closed structure, a sliding rail arranged in the shell, a sliding block arranged on the sliding rail in a sliding mode and a transmission piece connected between a driving piece and the sliding block, the shell is provided with an automatic overturning dustproof assembly, and a sliding groove channel is formed in the dustproof assembly located on the top of the shell. The cross beam slides in the sliding channel; a drag chain assembly for containing a wire harness is further arranged on the sliding block located in the shell, the sliding block moves in the length direction of the sliding rail, and the drag chain assembly slides in the shell along with the sliding block. The anti-dust drag chain has the effects of dust prevention, built-in drag chain wire harness, stable transmission keeping and effective noise reduction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile seat slide rails, in particular to a middle-mounted automobile seat slide rail. BACKGROUND

[0002] In recent years, the automobile industry has been booming, and the comfort and functionality of automobile seats have attracted more and more attention from consumers. As an important part of automobile seats, the performance of middle-mounted automobile seat slide rails directly affects the convenience and stability of seat adjustment. With the continuous improvement of design requirements of the main machine factory for slide rails, middle-mounted slide rails face new challenges in achieving good transmission and low noise. The reasonable design and optimization of middle-mounted slide rails are of great significance to improve the overall performance of automobile seats, which not only relates to the smoothness of seat movement, but also is closely related to the riding experience of passengers.

[0003] In the past, the industry usually used two sets of the same transition gear boxes to mesh transmission to transmit power for the transmission problem of the middle-mounted slide rail, and these transition gear boxes are generally made of metal. This way can achieve power transmission to a certain extent and meet the basic transmission requirements. For example, in some early automobile seat slide rail designs, engineers mainly rely on this traditional transition gear box mesh transmission to transmit the power of the motor to the lead screw, thereby achieving the movement of the seat. This transmission method is widely used in different types of automobile seats, whether it is an economy car or a luxury car. In addition, in some automobile production with strict cost control, this traditional metal transition gear box transmission method has become the first choice.

[0004] However, the demand for long slide rails in existing business cars requires the track to be buried under the floor, so it is not possible to achieve this mesh transmission through two sets of metal transition gear boxes. Due to the requirements of the main machine factory for the middle-mounted long slide rail, the distance between the center height of the motor and the lead screw increases, and this traditional transmission method cannot be achieved. SUMMARY

[0005] In order to achieve the requirements of high precision, low noise, high and low speed, long distance, dustproof sealing, etc. of long slide rails, the present application provides a middle-mounted automobile seat slide rail.

[0006] The middle-mounted automobile seat slide rail provided by the present application adopts the following technical scheme: A middle-mounted automobile seat slide rail, comprising two slide rail assemblies arranged in parallel, a cross beam arranged to slide on the slide rail assemblies, and a driving member installed between the two cross beams, wherein the driving member drives the cross beam and itself to move along the length direction of the slide rail assembly, and the slide rail assembly and the driving member form a height interval. The slide rail assembly comprises a shell forming a closed structure, a slide rail arranged inside the shell, a sliding block arranged on the slide rail, and a transmission member connected between the driving member and the sliding block. A drag chain assembly for accommodating wire harness is arranged on the sliding block inside the shell, the sliding block moves along the length direction of the slide rail, and the drag chain assembly slides in the shell along with the sliding block.

[0007] By adopting the above technical scheme, the two slide rail assemblies arranged in parallel cooperate with the sliding beam and the driving member to enable the sliding beam and the driving member thereon to move along the length direction of the slide rail assembly, thereby meeting the sliding requirement of the seat on the slide rail; the height distance between the slide rail assembly and the driving member can adapt to the requirement of the host factory for the increased distance between the motor and the lead screw; the closed structure of the shell can protect the internal slide rail, the sliding block and other components; the automatically flipped dustproof assembly can prevent dust from entering the shell and affecting the operation of the slide rail, and the sliding beam can slide in the sliding groove of the dustproof assembly, thereby ensuring the smoothness of the sliding; the drag chain assembly arranged on the sliding block for accommodating the wire harness can slide in the shell along with the sliding block, thereby effectively managing the wire harness and avoiding the influence of the disordered wire harness on the normal operation of the slide rail.

[0008] Optionally, the transmission member comprises a transition gear box mounted on the output end of the driving member, a first bevel gear mounted inside the transition gear box, a second bevel gear meshed with the first bevel gear, a worm coaxially connected to the second bevel gear, a worm wheel meshed and driven by the worm, and a lead screw sleeved on the worm wheel, wherein a threaded sleeve is sleeved in the worm wheel, the threaded sleeve is threadedly connected with the lead screw, the lead screw is mounted in the shell and penetrates through the sliding block, and the transition gear box is mounted on the sliding beam.

[0009] By adopting the above technical scheme, the transmission mode of the slide rail is changed to achieve good transmission, increase the distance between the motor and the lead screw, enable the driving member to drive the sliding beam and itself to move along the length direction of the slide rail assembly, and avoid the problem that the increased central height of the driving member and the lead screw leads to the failure of connection and transmission, the force of the first bevel gear is transmitted to the second bevel gear, the force of the second bevel gear is coaxially transmitted to the worm, and the worm drives the worm wheel.

[0010] Optionally, the dustproof assembly comprises a left side plate, a right side plate, a flap and a bent plate, the left side plate and the right side plate are respectively mounted on the two sides of the sliding groove, the flap and the bent plate are rotationally arranged on the edges of the sliding groove, the bent plate and the flap are arranged in turn and staggered, the area of the left side plate is greater than that of the right side plate, the end of the sliding beam is provided with a prying piece, the prying piece is triangular and sharp, the end of the prying piece abuts against the bottom of the bent plate or the flap, and the area of the prying piece is smaller than the width of the sliding groove.

[0011] By adopting the technical scheme, the turning plate and the bent plate are automatically turned over by the prying piece, the cross beam is facilitated to move in the sliding groove, and the left side plate, the right side plate, the turning plate and the bent plate form a dustproof sealed space to prevent dust from entering the inside of the shell and protect the slide rail assembly.

[0012] Optionally, the driving member comprises a base plate mounted on the side of the cross beam, a bearing plate mounted between the two base plates, and a motor mounted on the bearing plate, and the two output ends of the motor are coaxially connected with the first bevel gear.

[0013] By adopting the technical scheme, the base plate and the bearing plate can install and support the motor, the two output ends of the motor are coaxially connected with the first bevel gear, power can be transmitted to the first bevel gear, and then the cross beam and itself are driven to move along the length direction of the slide rail assembly through the subsequent transmission member, so that the driving function of the center-mounted automobile seat slide rail is realized.

[0014] Optionally, the first bevel gear and the second bevel gear are made of plastic.

[0015] By adopting the technical scheme, the first bevel gear and the second bevel gear made of plastic are used for transmission of the center-mounted automobile seat slide rail, so that good transmission can be realized, transmission accuracy can be improved, and transmission noise can be reduced.

[0016] Optionally, the drag chain assembly is arranged in the single-sided shell or the two-sided shell, and the drag chain assembly comprises a wire harness frame mounted on the side of the sliding block and a wire harness box mounted on the wire harness frame.

[0017] By adopting the technical scheme, the drag chain assembly is arranged on one side of the shell when the wire harness is arranged on one side, and when the wire harness is arranged on both sides, the two-sided shell accommodates the wire harness box and the wire harness frame, so that different and various scene requirements can be met.

[0018] Optionally, a plurality of weight reduction holes are formed in the bottom of the slide rail, and the weight reduction holes are linearly arranged along the length direction of the slide rail.

[0019] By adopting the technical scheme, the linearly arranged weight reduction holes formed in the bottom of the slide rail can reduce the weight of the center-mounted automobile seat slide rail.

[0020] Optionally, the worm and the worm gear transmission are arranged in the accommodation space formed in the top of the sliding block, and the accommodation space is in a convex shape.

[0021] By adopting the technical scheme, good transmission is realized, suitable installation space is provided for the transmission components, and the transmission efficiency and stability are improved.

[0022] Optionally, the bending plate / folding plate is provided with a rotating end near one side of the right side plate, the left side plate and the right side plate are hollow plates, the left side plate is provided with a bending groove near one side of the bending plate, the right side plate is provided with a concave groove near one side of the bending plate, the folding plate is in a "N" shape, and the bending plate is in a "J" shape.

[0023] By adopting the above technical scheme, the bending plate and the folding plate are provided with a rotating end near one side of the right side plate, so that the dustproof assembly can be automatically flipped; the left side plate and the right side plate are hollow plates, so that the weight can be reduced; the left side plate is provided with a bending groove, and the right side plate is provided with a concave groove, so that the bending plate and the folding plate are located in the bending groove and the concave groove; the folding plate is in a "N" shape, and the bending plate is in a "J" shape, so that the dustproof and waterproof functions can be better achieved, and the dustproof assembly can be automatically flipped when the cross beam moves in the sliding groove.

[0024] Optionally, a lubricating mechanism for lubricating the surface of the lead screw is arranged in the accommodating space, the lubricating mechanism comprises an elastic one-way valve arranged obliquely on the inner wall of the accommodating space and a spray head arranged on the same side of the elastic one-way valve, the spray head faces the lead screw, an oil storage cavity for storing an oil cavity is arranged in the side wall of the sliding block, the oil storage cavity is in communication with the spray head and the elastic one-way valve respectively, an oil return pipeline is formed between the inner bottom of the accommodating space and the oil storage cavity, and the oil return pipeline realizes return flow control through a control valve.

[0025] By adopting the above technical scheme, the lubricating mechanism in the accommodating space can lubricate the surface of the lead screw, and the oil in the oil storage cavity is sprayed to the lead screw through the cooperation of the elastic one-way valve and the spray head when the sliding block moves along the axis direction of the lead screw, and the oil return pipeline and the control valve can realize the return flow control of the oil, so as to improve the internal oil circulation, and then improve the smoothness and precision of the lead screw transmission and reduce the noise.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. The driving member and the sliding block are connected through the transmission member, and the sliding rail assembly and the driving member form a height distance, which can adapt to the requirement of the host factory for the increased distance from the motor to the lead screw, and realize good transmission; 2. The first bevel gear and the second bevel gear are made of plastic material, which can reduce the noise generated in the transmission process; 3. The sliding block is provided with a drag chain assembly for accommodating wire harness, and the drag chain assembly slides with the sliding block in the shell, so as to arrange and protect the wire harness in the sliding rail; 4. The accommodation space in the slider is provided with a lubricating mechanism. During the movement of the slider, the threaded sleeve on the worm gear moves relative to the screw rod, touches the elastic one-way valve, and the elastic one-way valve sprays the lubricating oil in the oil storage cavity to the surface of the screw rod through the nozzle under the action of pressure, so that the screw rod and the threaded sleeve are lubricated during movement, and the control valve at the bottom controls the return of the oil to improve the recycling. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 It is the overall structure schematic diagram of the embodiment 1 of the present application.

[0029] Figure 2 It is the overall structure cross-sectional view of the present application.

[0030] Figure 3 It is the partial structure schematic diagram of the dustproof assembly of the present application.

[0031] Figure 4 It is the A direction enlarged view of the present application. Figure 2

[0032] Figure 5 It is the structure schematic diagram of the drag chain assembly of the present application.

[0033] Figure 6 It is the partial structure schematic diagram of the driving member of the present application.

[0034] Figure 7 It is the partial structure schematic diagram of the embodiment 2 of the present application.

[0035] Figure 8 It is the cross-sectional view of the embodiment 2 of the present application.

[0036] The drawings are as follows: 1, slide rail assembly; 2, cross beam; 3, driving member; 11, shell; 12, slide rail; 13, slider; 14, transmission member; 4, sliding groove; 5, drag chain assembly; 51, wire harness frame; 52, wire harness box; 141, transition gear box; 142, first bevel gear; 143, second bevel gear; 144, worm; 145, worm gear; 146, screw rod; 6, dustproof assembly; 61, left side plate; 62, right side plate; 63, bent plate; 64, turning plate; 65, prying piece; 31, pad plate; 32, bearing plate; 33, motor; 7, lubricating mechanism; 71, elastic one-way valve; 72, nozzle; 73, oil storage cavity; 74, control valve; 75, oil return pipeline.​ Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0038] Example 1 The centrally mounted car seat rail provided in this embodiment is described in [reference]. Figure 1 As shown, it includes two parallel slide rail assemblies 1, a crossbeam 2 slidably arranged on the slide rail assembly 1, and a drive component 3 installed between the two crossbeams 2. The drive component 3 drives the crossbeam 2 and itself to move along the length direction of the slide rail assembly 1. The slide rail assembly 1 and the drive component 3 form a height gap. The slide rail assembly 1 and the drive component 3 cooperate with each other. The drive component 3 can provide power for the movement of the crossbeam 2. Since the two form a height gap, it can meet the design requirements of the OEM for the centrally located slide rail 12 and avoid the problem that the traditional transmission method cannot achieve transmission when the distance from the motor to the lead screw increases.

[0039] See Figure 3 As shown, the slide rail assembly 1 includes a housing 11 forming a closed structure, a slide rail 12 arranged inside the housing 11, a slider 13 slidably arranged on the slide rail 12, and a transmission component 14 connecting the drive component 3 and the slider 13. The housing 11 is generally made of metal, possessing a certain strength and protective properties, protecting the internal components such as the slide rail 12 and slider 13 from external dust and debris. The slide rail 12 is usually made of high-strength steel, and its surface is precision-machined to ensure the smooth sliding of the slider 13. The slider 13 can be made of aluminum alloy, which is lightweight and has good wear resistance. It cooperates with the slide rail 12 through internal pulleys or rollers to achieve sliding along the slide rail 12. The transmission component 14 transmits the power of the drive component 3 to the slider 13.

[0040] See Figure 2 and Figure 4As shown, the transmission member 14 includes a transition gear box 141 mounted on the output end of the driving member 3, a first bevel gear 142 mounted inside the transition gear box 141, a second bevel gear 143 engaged with the first bevel gear 142, a worm 144 coaxially connected to the second bevel gear 143, a worm wheel 145 engaged with the worm 144, and a lead screw 146 sleeved on the worm wheel 145. The transition gear box 141 serves to protect and support the internal gears, which can be manufactured by casting process to ensure the accuracy of the internal space. The first bevel gear 142 and the second bevel gear 143 are both made of plastic material, which can effectively reduce noise during transmission compared with traditional metal material, and also can ensure a certain transmission accuracy. The plastic here can be polyoxymethylene (POM), or suitable material can be selected, which has self-lubricating property and high strength. The first bevel gear 142 and the second bevel gear 143 are engaged with each other to change the direction of the power of the driving member 3. The transmission mode of the worm 144 and the worm wheel 145 can achieve a large reduction ratio to improve the stability of the transmission. The lead screw 146 generally has high precision and good transmission efficiency, and the worm wheel 145 is sleeved with a threaded sleeve, and the specific structure can be referred to the authorized announcement No. CN218408412U. The threaded sleeve and the lead screw 146 are threadedly connected, the lead screw 146 is installed in the housing 11 and the lead screw 146 penetrates the sliding block 13, and the transition gear box 141 is mounted on the cross beam 2. When the driving member 3 works, the first bevel gear 142 is driven to rotate, the worm 144 is driven to rotate through the engagement of the first bevel gear 142 and the second bevel gear 143, and the worm wheel 145 and the lead screw 146 are driven to rotate, and the rotary motion is converted into linear motion due to the threaded connection between the lead screw 146 and the threaded sleeve, so as to drive the sliding block 13 to move along the lead screw 146, thereby realizing the movement of the cross beam 2 along the sliding rail assembly 1.

[0041] Referring to Figure 3As shown, the dustproof assembly 6 is arranged on the shell 11, and the dustproof assembly 6 on the top of the shell 11 is formed with a sliding groove 4 in which the crossbeam 2 slides. The dustproof assembly 6 comprises a left side plate 61, a right side plate 62, a flap 64 and a bent plate 63. The left side plate 61 and the right side plate 62 are respectively installed on the two sides of the sliding groove 4 and serve to fix and support. The left side plate 61 and the right side plate 62 can be made of plastic material, which is light in weight and has certain toughness. The flap 64 and the bent plate 63 are both rotationally arranged on the edges of the sliding groove 4, and the bent plate 63 and the flap 64 are arranged in turn and staggered. Such arrangement can make the flap 64 and the bent plate 63 turn in turn by the prying piece 65 at the end of the crossbeam 2 when the crossbeam 2 moves, so as to realize the dustproof protection of the sliding groove 4. The area of the left side plate 61 is greater than that of the right side plate 62. The end of the crossbeam 2 is provided with the prying piece 65 which is in the shape of a triangular sharp. The end of the prying piece 65 abuts against the bottom of the bent plate 63 / flap 64, and the area of the prying piece 65 is smaller than the width of the sliding groove 4. When the crossbeam 2 moves, the prying piece 65 will pry the bent plate 63 and the flap 64 in turn, so as to make them turn. When the crossbeam 2 leaves, the flap 64 and the bent plate 63 will restore to the original position under the action of gravity or a reset device such as a spring, so as to block the dust from entering the inside of the shell 11.

[0042] Referring to Figure 3 and Figure 5 As shown, the pull chain assembly 5 for accommodating wire harnesses is further arranged on the slider 13 inside the shell 11. The slider 13 moves along the length direction of the slide rail 12, and the pull chain assembly 5 slides with the slider 13 in the shell 11. The pull chain assembly 5 comprises a wire harness rack 51 installed on the side of the slider 13 and a wire harness box 52 installed on the wire harness rack 51. The wire harness rack 51 can be a metal support which has certain strength and can be firmly installed on the wire harness box 52. The wire harness box 52 is generally made of plastic material, and a partition plate can be arranged inside the wire harness box 52 for arranging and protecting the wire harnesses and preventing the wire harnesses from being wound or damaged during the movement of the slider 13.

[0043] Referring to Figure 6 As shown, the driving member 3 comprises a pad plate 31 installed on the side of the crossbeam 2, a bearing plate 32 installed between the two pad plates 31 and a motor 33 installed on the bearing plate 32. The motor is a double-shaft motor. The pad plate 31 can serve to buffer and support and is generally made of rubber or silicone. The bearing plate 32 is generally a metal plate which has sufficient strength to support the motor 33. The two output ends of the motor 33 are coaxially connected with the first bevel gear 142. When the motor 33 works, it directly drives the first bevel gear 142 to rotate, thereby providing power for the whole transmission system.

[0044] Referring to Figure 3As shown, the bottom of the slide rail 12 is provided with a plurality of lightening holes, which are linearly arranged along the length direction of the slide rail 12. The lightening holes can reduce the weight of the slide rail 12 without affecting the strength of the slide rail 12, thereby reducing the weight of the entire middle seat slide rail 12 and improving the fuel economy of the automobile.

[0045] As shown, Figure 4 As shown, the worm 144 and the worm wheel 145 are arranged in the concave space formed in the top of the sliding block 13. The concave space can better accommodate the worm 144 and the worm wheel 145 and provide sufficient space for the transmission of the worm 144 and the worm wheel 145, and facilitates lubrication and other operations.

[0046] The implementation principle of the middle seat slide rail 12 of the embodiment is that: by adopting the first bevel gear 142 and the second bevel gear 143 made of plastic material and the unique structure of the transmission member 14, the noise in the transmission process is effectively reduced, the transmission precision is improved, and the requirement of the host factory for the increased distance from the motor to the lead screw is met. At the same time, the setting of the dustproof assembly 6 and the drag chain assembly 5 ensures the cleanliness inside the slide rail assembly 1 and the orderly arrangement of the wire harness, and the entire middle seat slide rail 12 has a significant improvement in the transmission performance and noise control compared with the traditional design, thereby providing a strong guarantee for the comfort and functionality of the automobile seat.

[0047] Embodiment 2 The difference between the embodiment and the above-mentioned embodiments is that: Figure 7 and Figure 8 As shown, the concave space is provided with a lubricating mechanism 7 for lubricating the surface of the lead screw 146. The lubricating mechanism 7 further improves the service life and performance of the transmission component. The lubricating mechanism 7 includes an elastic check valve 71 obliquely arranged on the inner wall of the concave space and a spray head 72 arranged on the same side of the elastic check valve 71, the spray head 72 faces the lead screw 146, and the side wall of the sliding block 13 is provided with an oil storage cavity 73 for storing the oil cavity. The oil storage cavity 73 is in communication with the spray head 72 and the elastic check valve 71, respectively, and the inner bottom of the concave space and the oil storage cavity 73 form an oil return pipeline 75, and the oil return pipeline 75 realizes the flow control through a control valve 74. When the sliding block 13 moves, the elastic check valve 71 will open or close according to the change of the pressure, the lubricating oil in the oil storage cavity 73 is sprayed to the surface of the lead screw 146 through the spray head 72, which plays a lubricating role, reduces the friction between the lead screw 146 and the threaded sleeve, and improves the transmission efficiency and service life. The excess lubricating oil will flow back to the oil storage cavity 73 through the oil return pipeline 75, and the control valve 74 can control the speed and flow of the oil return, thereby ensuring the recycling of the lubricating oil.

[0048] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Unless otherwise defined, the terms "first", "second" or "third" and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. The terms "one", "another", "an" or "some" as well as similar referents in the context of describing the specification and claims are to be construed to be open-ended, i.e., to cover both singular and plural referents unless otherwise indicated. The terms "including", "containing" or "comprising" and the like are not intended to exclude other integers or steps, but to "include" or "comprise" other integers or steps unless otherwise indicated. The terms "connected", "coupled" or "pathway" and the like are not limited to direct connections, couplings or pathways, but can also include indirect connections, couplings or pathways unless otherwise indicated.

[0049] The above are only preferred embodiments of the present application, not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A centrally mounted automotive seat slide rail, characterized in that: It includes two parallel slide rail assemblies (1), a crossbeam (2) slidably arranged on the slide rail assembly (1), and a drive member (3) installed between the two crossbeams (2). The drive member (3) drives the crossbeam (2) and itself to move along the length direction of the slide rail assembly (1). The slide rail assembly (1) and the drive member (3) form a height gap. The slide rail assembly (1) includes a housing (11) forming a closed structure, a slide rail (12) arranged inside the housing (11), a slider (13) slidably arranged on the slide rail (12), and a transmission component (14) connecting the drive component (3) and the slider (13). An automatically flipping dustproof assembly (6) is arranged on the housing (11). The dustproof assembly (6) located on the top of the housing (11) forms a sliding channel (4). The crossbeam (2) slides in the sliding channel (4). A cable chain assembly (5) for accommodating wire harnesses is also provided on the slider (13) located inside the housing (11). The slider (13) moves along the length direction of the slide rail (12), and the cable chain assembly (5) slides inside the housing (11) with the slider (13).

2. The centrally mounted automotive seat slide rail according to claim 1, characterized in that: The transmission component (14) includes a transition gearbox (141) mounted on the output end of the drive component (3), a first bevel gear (142) mounted inside the transition gearbox (141), a second bevel gear (143) meshing with the first bevel gear (142), a worm gear (144) coaxially connected to the second bevel gear (143), a worm wheel (145) meshing with the worm gear (144), and a lead screw (146) sleeved on the worm wheel (145). A threaded sleeve is sleeved inside the worm wheel (145), and the threaded sleeve and the lead screw (146) are threadedly engaged. The lead screw (146) is mounted inside the housing (11) and the lead screw (146) passes through the slider (13). The transition gearbox (141) is mounted on the crossbeam (2).

3. The centrally mounted automotive seat slide rail according to claim 2, characterized in that: The dustproof component (6) includes a left side plate (61), a right side plate (62), a flap (64), and a bending plate (63). The left side plate (61) and the right side plate (62) are respectively installed on both sides of the sliding channel (4). The flap (64) and the bending plate (63) are rotatably arranged on the edge of the sliding channel (4). The bending plate (63) and the flap (64) are arranged alternately in sequence. The area of ​​the left side is larger than the area of ​​the right side plate (62). The end of the crossbeam (2) is provided with a prying piece (65). The prying piece (65) is triangular and sharp. The end of the prying piece (65) abuts against the bottom of the bending plate (63) / flap (64). The area of ​​the prying piece (65) is smaller than the width of the sliding channel (4).

4. A centrally located automotive seat slide rail according to claim 2, characterized in that: The drive unit (3) includes a pad (31) installed on the side of the crossbeam (2), a support plate (32) installed between the two pads (31), and a motor (33) installed on the support plate (32). The two output ends of the motor (33) are coaxially connected to the first bevel gear (142).

5. A centrally located automotive seat slide rail according to claim 2, characterized in that: Both the first bevel tooth (142) and the second bevel tooth (143) are made of plastic.

6. A centrally located automotive seat slide rail according to claim 1, characterized in that: The drag chain assembly (5) is arranged inside the single-side housing (11) or inside the two-side housings (11). The drag chain assembly (5) includes a wire harness holder (51) installed on the side of the slider (13) and a wire harness box (52) installed on the wire harness holder (51).

7. A centrally mounted automotive seat slide rail according to claim 1, characterized in that: A number of weight reduction holes are formed at the bottom of the slide rail (12), and the weight reduction holes are linearly arranged in an array along the length direction of the slide rail (12).

8. A centrally located automotive seat slide rail according to claim 2, characterized in that: The worm (144) and the worm wheel (145) are arranged for transmission in the accommodation space formed at the top of the slider (13), and the accommodation space is in a convex shape.

9. A centrally mounted automotive seat slide rail according to claim 3, characterized in that: One side of the bending plate (63) / flap (64) close to the right side plate (62) is the rotating end. Both the left side plate (61) and the right side plate (62) are hollow plates. A bending groove is formed on one side of the left side plate (61) close to the bending plate (63), and a concave groove is formed on one side of the right side plate (62) close to the bending plate (63). The flap (64) is in a "U" - shaped structure, and the bending plate (63) is in a "Z" - shaped structure.

10. A centrally mounted automotive seat slide rail according to claim 8, characterized in that: A lubrication mechanism (7) for lubricating the surface of the lead screw (146) is arranged in the accommodation space. The lubrication mechanism (7) includes an elastic one - way valve (71) obliquely installed on the inner wall of the accommodation space and a spray head (72) installed on the same side as the elastic one - way valve (71). The spray head (72) faces the lead screw (146). An oil storage cavity (73) for storing the oil supply cavity is formed on the side wall of the slider (13). The oil storage cavity (73) is respectively connected to the spray head (72) and the elastic one - way valve (71). An oil return pipeline (75) is formed between the inner bottom of the accommodation space and the oil storage cavity (73), and the oil return pipeline (75) realizes the reflux control through a control valve (74).

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