Low-noise automobile seat horizontal driver

Abstract

The utility model provides a low-noise automobile seat horizontal driver which comprises a lead screw, a front support, a middle support, a rear support and a gear box. The front support, the middle support and the rear support are sequentially arranged on the lead screw, and the gear box is arranged on the middle support and used for driving an automobile seat to move horizontally. A displacement bevel gear connected with the screw rod and a displacement worm meshed with the displacement bevel gear are arranged in the gear box; the transmission component which is accurate in transmission, good in mute effect and convenient to install is adopted to meet the transmission requirement for electric adjustment of the automobile seat, the deflection bevel gear and the deflection worm are adopted, the strength of a transmission structure can be balanced, the transmission coincidence degree is improved, and noise reduction is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of automobile seat, in particular to a low noise automobile seat horizontal driver. BACKGROUND

[0002] The automobile electric slide rail system is the key component for realizing the forward and backward adjustment of the seat, and the core of the driving mechanism thereof is a HDM (High-Density Motor) gear box. The HDM gear box becomes the ideal choice for the electric slide rail driving due to its high power density, high efficiency and compact structure.

[0003] In order to realize the convenient electric adjustment, the driving force of the driving mechanism needs to be transmitted to the action mechanism, and the impact and noise will be generated during the operation of the HDM gear box, which will have an important influence on the use effect of the automobile seat adjustment, and therefore it is necessary to improve the transmission efficiency and the mute effect of the driving mechanism. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a low noise automobile seat horizontal driver, which can accurately transmit power, has a better mute effect and can be conveniently installed to meet the transmission requirements of the electric adjustment of the automobile seat.

[0005] To this end, the utility model adopts the technical scheme that a low noise automobile seat horizontal driver comprises a screw rod, a front support, a middle support, a rear support arranged on the screw rod in sequence and a gear box arranged on the middle support and used for driving the horizontal movement of the automobile seat, and a variable position helical gear connected with the screw rod and a variable position worm meshing with the variable position helical gear are arranged in the gear box.

[0006] As a preferred scheme of the above scheme, the variable position coefficient of the variable position worm relative to a standard worm is x1, the addendum coefficient of the variable position worm is k1, the dedendum coefficient of the variable position worm is g1, the variable position coefficient of the variable position helical gear relative to a standard gear is x2, the addendum coefficient of the variable position helical gear is k2, the dedendum coefficient of the variable position helical gear is g2, and 0 < x1 < 0.8, 0.4 < k1 < 1, 1.25 < g1 < 2, -0.6 < x2 < 0, 1 < k2 < 1.75 and 0.8 < g2 < 1.25.

[0007] Further preferably, metal gaskets and plastic bearings are arranged at both ends of the variable position helical gear, the metal gaskets are provided with openings, and clamping claws for clamping between two adjacent teeth of the variable position helical gear are arranged at the openings.

[0008] Further preferably, the gear box comprises a first box body and a second box body, mounting grooves for positioning the variable position helical gear are arranged in the first box body and the second box body, and mounting holes for positioning the variable position worm are further arranged on the first box body and the second box body.

[0009] Further preferably, threaded holes for screw connection are arranged on the first box body and the second box body, a protrusion is arranged on the edge of the second box body, a groove matched with the protrusion is arranged on the edge of the first box body, a pin is fixedly arranged on the part of the second box body in contact with the first box body, and a pin hole matched with the pin is arranged on the first box body.

[0010] Further preferably, shock-absorbing pads for reducing vibration of the gear box when the gear box moves on the lead screw are arranged on the front and rear sides of the gear box, and positioning holes for positioning metal pads are arranged on the shock-absorbing pads.

[0011] The beneficial effects of the utility model are as follows: accurate transmission, better mute effect, convenient installation, meeting the transmission demand of electric adjustment of automobile seats, using variable position helical gear and variable position worm, balancing the strength of the transmission structure, improving the coincidence degree of transmission, and reducing noise. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the installation structure schematic view of the gear box in the utility model.

[0013] Figure 2 is the exploded view of the gear box in the utility model.

[0014] Figure 3 is the connection schematic view of the variable position helical gear and the variable position worm in the utility model.

[0015] Figure 4 is the structure schematic view of the plastic bearing in the utility model. DETAILED DESCRIPTION

[0016] The utility model will be further described in combination with the drawings and embodiments.

[0017] As Figures 1-4 shown in the figure, a low-noise automobile seat horizontal driver includes a lead screw 4, a front support 1, a middle support 3, a rear support 2 arranged in sequence on the lead screw 4, and a gear box 5 arranged on the middle support 3 for driving the horizontal movement of the automobile seat, the gear box 5 is provided with a variable position helical gear 6 connected with the lead screw 4 and a variable position worm 7 meshed with the variable position helical gear 6. The front support 1 and the rear support 2 are arranged to fix the lead screw 4, the middle support 3 is arranged on the lead screw 4, the gear box 5 is arranged on the middle support 3, the variable position helical gear 6 in the gear box 5 drives the lead screw 4, so that the gear box 5 moves left and right on the lead screw 4, achieving the purpose of horizontally adjusting the automobile seat.

[0018] The transmission between the modified helical gear 6 and the screw rod 4 is realized by the rotation of the modified worm 7. The modified worm 7 is installed at one end of the modified worm 7, and a driving member is arranged. The driving member can adopt a motor (which is prior art and will not be described here). The rotation of the modified worm 7 is driven by the driving member, thereby driving the rotation of the modified helical gear 6, so that the gear box 5 moves left and right on the screw rod 4.

[0019] The modification coefficient of the modified worm 7 relative to the standard worm is x1, the addendum coefficient of the modified worm 7 is k1, the dedendum coefficient of the modified worm 7 is g1, the modification coefficient of the modified helical gear 6 relative to the standard gear is x2, the addendum coefficient of the modified helical gear 6 is k2, and the dedendum coefficient of the modified helical gear 6 is g2, and 0 < x1 < 0.8, 0.4 < k1 < 1, 1.25 < g1 < 2; -0.6 < x2 < 0, 1 < k2 < 1.75, 0.8 < g2 < 1.25.

[0020] The modification coefficient of the standard worm and the standard helical gear is 0 by default, that is, the worm and the helical gear are not modified.

[0021] The modification coefficient of the modified worm 7 is x1, that is, the modified worm 7 is positive modification, and the coefficient is 0-0.8.

[0022] The modification coefficient of the modified helical gear 6 is x2, that is, the modified helical gear 6 is negative modification, and the coefficient is -0.6-0.

[0023] Wherein the modification coefficient greater than 0 is positive modification, and the modification coefficient less than 0 is negative modification. The positive modification refers to the gear with thickened tooth thickness. In the machining process, the cutter is moved out from the standard position to the center of the blank, so that the tooth thickness of the cut gear is increased. The negative modification refers to the gear with thinned tooth thickness. In the machining process, the cutter is moved into the center of the blank from the standard position, so that the tooth thickness of the cut gear is reduced.

[0024] The dedendum coefficient of the standard worm and the standard helical gear is 1.25-1.35.

[0025] The dedendum coefficient of the modified worm 7 is g1, and the dedendum coefficient is 1.25-2.

[0026] The dedendum coefficient of the modified helical gear 6 is g2, and the dedendum modification coefficient is 0.8-1.25.

[0027] The addendum coefficient of the standard worm and the standard helical gear is 0-0.8.

[0028] The addendum coefficient of the modified helical gear 6 is k2, and the addendum coefficient is 1-1.75.

[0029] The addendum coefficient of the modified worm 7 is k1, and the addendum coefficient is 0.4-1.

[0030] By using the variable position, the strength of the variable position helical gear 6 and the variable position worm 7 can be balanced, and the coincidence degree of transmission can be improved, which is beneficial to reduce the noise generated in the transmission process.

[0031] The variable position helical gear 6 is provided with a metal gasket 10 and a plastic bearing 11 at both ends, the metal gasket 10 is provided with an opening, and the opening is provided with a clamping jaw 12 for clamping between two adjacent teeth of the variable position helical gear 6. The variable position helical gear 6 is installed and fixed in the gear box 5 through the metal gasket 10 and the plastic bearing 11, and the opening and the clamping jaw 12 are arranged on the metal gasket 10, and the clamping jaw 12 is clamped between two adjacent teeth of the variable position helical gear 6, so as to reduce the collision in the transmission and reduce the noise. The plastic bearing 11 adopts a four straight edge structure, which is positioned in the gear box 5 body, so as to control the rotation.

[0032] The gear box 5 includes a first box body 8 and a second box body 9, the first box body 8 and the second box body 9 are provided with a mounting groove 13 for positioning the variable position helical gear 6, and the first box body 8 and the second box body 9 are also provided with a mounting hole 14 for positioning the variable position worm 7. The mounting hole 14 is provided to facilitate the positioning of the variable position worm 7 and the connection of the motor output end and the variable position worm 7.

[0033] The first box body 8 and the second box body 9 are provided with threaded holes 16 for screw 15 connection, the edge of the second box body 9 is provided with a protrusion 17, the edge of the first box body 8 is provided with a groove 18 matched with the protrusion 17, the part of the second box body 9 contacting the first box body 8 is fixedly provided with a pin 19, and the first box body 8 is provided with a pin hole 20 matched with the pin 19. The first box body 8 and the second box body 9 are connected by four bolts, and the protrusion 17 and the groove 18, the pin 19 and the pin hole 20 are arranged between the first box body 8 and the second box body 9, which facilitates the positioning between the first box body 8 and the second box body 9, and facilitates the subsequent installation and fixation of the bolts.

[0034] The outer surface of the second box body 9 is provided with an identification block 23 for motor positioning and identifying the front of the gear box 5, and the mounting hole 14 passes through the identification block 23 for the connection of the worm and the output end of the motor.

[0035] The gear box 5 is provided with a shock pad 21 on the front and rear sides for reducing the vibration of the gear box 5 when transmitting on the lead screw 4, and the shock pad 21 is provided with a positioning hole 22 for positioning the metal gasket 10. The shock pad 21 is positioned by the metal gasket 10, which facilitates the installation of the metal gasket 10, thereby improving the stability of the gear box 5 when transmitting on the lead screw 4.

[0036] The transmission component can accurately transmit, has better mute effect, and is convenient to install, so as to meet the transmission demand of electric adjustment of automobile seat, the variable position helical gear 6 and the variable position worm 7 can balance the strength of the transmission structure, improve the coincidence degree of transmission, and be beneficial to reduce the noise.

[0037] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A low-noise automotive seat leveling actuator, characterized in that: It includes a lead screw (4), a front bracket (1), a middle bracket (3), a rear bracket (2) arranged sequentially on the lead screw (4), and a gearbox (5) arranged on the middle bracket (3) for driving the horizontal movement of the car seat. The gearbox (5) is provided with a displacement helical gear (6) connected to the lead screw (4) and a displacement worm gear (7) meshing with the displacement helical gear (6).

2. The low-noise automotive seat leveling actuator according to claim 1, characterized in that: The displacement coefficient of the modified worm (7) relative to the standard worm is set as x1, the tooth addendum coefficient of the modified worm (7) is set as k1, and the tooth root height coefficient of the modified worm (7) is set as g1. The displacement coefficient of the modified helical gear (6) relative to the standard gear is set as x2, the tooth addendum coefficient of the modified helical gear (6) is set as k2, and the tooth root height coefficient of the modified helical gear (6) is set as g2, and 0 < x1 < 0.8, 0.4 < k1 < 1, 1.25 < g1 < 2; -0.6 < x2 < 0, 1 < k2 < 1.75, 0.8 < g2 < 1.

25.

3. The low-noise automotive seat leveling actuator according to claim 1, characterized in that: Both ends of the modified helical gear (6) are provided with metal shims (10) and plastic bearings (11). The metal shims (10) are provided with openings, and the openings are provided with pawls (12) for engaging between two adjacent teeth of the modified helical gear (6).

4. The low-noise automotive seat leveling actuator according to claim 1, characterized in that: The gearbox (5) includes a first housing (8) and a second housing (9). The first housing (8) and the second housing (9) are fastened together, and a mounting groove (13) for positioning the displacement helical gear (6) is provided in the cavity formed by the first housing and the second housing. The first housing (8) and the second housing (9) are also provided with mounting holes (14) for positioning the displacement worm gear (7).

5. A low-noise automotive seat leveling actuator according to claim 4, characterized in that: Both the first housing (8) and the second housing (9) are provided with threaded holes (16) for screw (15) connection. The edge of the second housing (9) is provided with a protrusion (17). The edge of the first housing (8) is provided with a groove (18) that matches the protrusion (17). The part of the second housing (9) that contacts the first housing (8) is fixedly provided with a pin (19). The first housing (8) is provided with a pin hole (20) that matches the pin (19).

6. The low-noise automotive seat leveling actuator according to claim 1, characterized in that: Both the front and rear sides of the gearbox (5) are provided with shock-absorbing pads (21) to reduce the vibration of the gearbox (5) when it is driven on the lead screw (4). The shock-absorbing pads (21) are provided with positioning holes (22) for positioning metal shims (10).

Images