Horizontal driving gearbox for automobile seat

Abstract

The utility model provides an automobile seat horizontal driving gear box which comprises a gear box body, the gear box body comprises a first box body and a second box body, driving structures used for driving an automobile seat to move horizontally are arranged in the first box body and the second box body, and each driving structure comprises a displacement worm gear and a displacement worm meshed with the displacement worm gear; the transmission component which is accurate in transmission, has a good mute effect and is convenient to install is used for meeting the transmission requirement of electric adjustment of the automobile seat, the deflection worm 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 technical field of automobile corrosion resistance research, especially to a horizontal drive gear box of automobile seat. BACKGROUND

[0002] The automobile electric slide rail system is a key component for realizing the forward and backward adjustment of the seat, and the core of the driving mechanism thereof is an HDM (High-Density Motor) gear box. The HDM gear box becomes an 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 the transmission efficiency and the mute effect of the driving mechanism need to be improved. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a horizontal drive gear box of automobile seat, which can accurately transmit, has a better mute effect and can be conveniently installed to meet the transmission demand of the electric adjustment of the automobile seat.

[0005] To this end, the utility model adopts the technical scheme that comprises a gear box body, the gear box body comprises a first box body and a second box body, the first box body and the second box body are buckled, and a driving structure for driving the horizontal movement of the automobile seat is arranged in the cavity formed by the first box body and the second box body, and the driving structure comprises a variable position worm wheel and a variable position worm gear engaged with the variable position worm wheel.

[0006] As the preferred scheme of the above scheme, the variable position worm gear adopts tooth profile variable position and tooth thickness positive variable position, the variable position worm wheel adopts tooth profile positive variable position and tooth thickness negative variable position, the tooth profile variable position coefficient of the variable position worm gear relative to the standard worm gear is set as x1, the tooth thickness variable position coefficient of the variable position worm gear is set as g1, the tooth profile variable position coefficient of the variable position worm wheel relative to the standard worm wheel is set as x2, the tooth thickness variable position coefficient of the variable position worm wheel is set as g2, and -0.2 < x1 < 0.2, 0 < g1 < 0.5, 0 < x2 < 0.4, -0.5 < g2 < 0.

[0007] Further preferably, the first box body is provided with a positioning pin and a guide pin, the second box body is provided with a positioning pin hole matched with the positioning pin and a guide pin hole matched with the guide pin, and the guide pin is in the shape of a key groove.

[0008] Further preferably, the variable position worm gear is provided with plastic bearings at both ends for installation with the first and second boxes, the first and second boxes are provided with installation grooves for installation of the variable position worm gear, and one side of the first and second boxes is provided with an installation hole for installation of the variable position worm.

[0009] Further preferably, the gear box is provided with shock pads on both front and rear sides, and the shock pads are provided with positioning holes for positioning of the plastic bearings.

[0010] Further preferably, the plastic bearings adopt a quadrangular structure and are positioned in the gear box.

[0011] Further preferably, the first and second boxes are provided with protrusions on both sides for installation of the shock pads, and the shock pads are provided with insertion grooves matched with the protrusions.

[0012] The utility model discloses the beneficial effects: can accurate transmission, and have better mute effect, and can conveniently install, to satisfy the transmission demand of electrically -operated adjustment of automobile seat, adopt variable position worm gear and variable position worm, can make the strength of transmission structure balanced, improve the coincidence of transmission, be favorable to reduce the noise. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the explosion map of the utility model.

[0014] Figure 2 It is the structure schematic diagram of the utility model.

[0015] Figure 3 It is the structure schematic diagram of the second box in the utility model.

[0016] Figure 4 It is the structure schematic diagram of the first box in the utility model.

[0017] Figure 5 It is the structure schematic diagram of the shock pad in the utility model.

[0018] Figure 6 It is the connection structure schematic diagram of the worm gear and worm in the utility model.

[0019] Figure 7 It is the structure schematic diagram of the plastic bearing in the utility model. DETAILED DESCRIPTION

[0020] The utility model will be further described below in connection with the drawings and examples.

[0021] As Figures 1-7As shown, a horizontal driving gear box of an automobile seat comprises a gear box body, the gear box body comprises a first box body 1 and a second box body 2, the first box body 1 and the second box body 2 are buckled and are provided with a driving structure for driving the horizontal movement of the automobile seat in a cavity formed by the first box body 1 and the second box body 2, the driving structure comprises a variable position worm wheel 3 and a variable position worm 4 engaged with the variable position worm wheel 3. The gear box is arranged on a middle support on a screw rod fixed by a front support and a rear support (not shown in the figure), and the gear box is driven by the variable position worm wheel 3 in the gear box and the screw rod, so that the gear box moves left and right on the screw rod, thereby achieving the purpose of horizontally adjusting the automobile seat.

[0022] The variable position worm 4 adopts tooth profile variable position, and the tooth thickness is positive variable position. The variable position worm wheel 3 adopts tooth profile positive variable position, and the tooth thickness is negative variable position. The tooth profile variable position coefficient of the variable position worm 4 relative to the standard worm is x1, the tooth thickness variable position coefficient of the variable position worm 4 is g1, the tooth profile variable position coefficient of the variable position worm wheel 3 relative to the standard worm wheel is x2, and the tooth thickness variable position coefficient of the variable position worm wheel 3 is g2, and -0.2 < x1 < 0.2, 0 < g1 < 0.5, 0 < x2 < 0.4, -0.5 < g2 < 0.

[0023] The variable position coefficient of the standard worm and the standard worm wheel is 0 by default, that is, the worm and the worm wheel are not variable position.

[0024] The tooth profile variable position coefficient of the variable position worm 4 relative to the standard worm is x1, that is, the tooth profile of the variable position worm 4 is positive variable position or negative variable position, and the tooth profile coefficient is -0.2-0.2.

[0025] The tooth profile variable position coefficient of the variable position worm wheel 3 relative to the standard worm wheel is x2, that is, the tooth profile of the variable position worm wheel 3 is positive variable position, and the tooth profile coefficient is 0-0.4.

[0026] Wherein the variable position coefficient is represented as: x; when the gear is processed, the offset of the cutter center line relative to the index circle (unit: modulus m). The outward movement is positive variable position (x>0): the tooth root thickness is increased, the bending strength is improved, but the tooth tip may be thinned; the inward movement is negative variable position (x<0), the tooth root stress concentration is reduced, but the tooth tip thickness needs to meet the strength requirement.

[0027] The tooth thickness variable position coefficient of the variable position worm 4 relative to the standard worm is g1, that is, the tooth thickness of the variable position worm 4 is positive variable position, and the tooth thickness coefficient is 0-0.5.

[0028] The tooth thickness variable position coefficient of the variable position worm wheel 3 relative to the standard worm wheel is g2, that is, the tooth thickness of the variable position worm wheel 3 is negative variable position, and the tooth profile coefficient is -0.5-0.

[0029] By adopting such variable position, not only the strength of the variable position worm wheel 3 and the variable position worm 4 is balanced, but also the coincidence degree of transmission is improved, which is beneficial to reduce the noise in the transmission process.

[0030] The first box body 1 is provided with a positioning pin 6 and a guide pin 7, the second box body 2 is provided with a positioning pin hole 8 matched with the positioning pin 6 and a guide pin hole 9 matched with the guide pin 7, and the guide pin 7 is in the shape of a key groove. The guide pin 7 is used for positioning and guiding, facilitating the connection between the first box body 1 and the second box body 2, and the positioning pin 6 is used for fixing.

[0031] The variable position worm wheel 3 is provided with plastic bearings 5 at both ends for mounting on the first box body 1 and the second box body 2, the first box body 1 and the second box body 2 are provided with mounting grooves 10 for mounting the variable position worm wheel 3, and one side of the first box body 1 and the second box body 2 is provided with a mounting hole 11 for mounting the variable position worm 4. The variable position worm wheel 3 is mounted on the first box body 1 and the second box body 2 through the plastic bearings 5.

[0032] The gear box is provided with shock pads 12 on both sides, and the shock pads 12 are provided with positioning holes 13 for positioning the plastic bearings 5 (not shown in the figure). The shock pads 12 are provided to reduce the vibration generated during the transmission of the gear box, thereby reducing the noise.

[0033] The plastic bearing 5 adopts a four-corner structure and is positioned in the gear box. The positioning is simple and reliable, which is beneficial to the automatic equipment grabbing, thereby controlling the rotation. The outer circular surface of the plastic bearing 5 and the inner circular surface formed by the second box body 2 and the first box body 1 are matched, and the space formed by the outer diameter of the shaft shoulder and the lead screw (not shown in the figure) can store grease. The material is generally plastic.

[0034] The first box body 1 and the second box body 2 are provided with protrusions 14 on both sides for mounting the shock pads 12, and the shock pads 12 are provided with insertion grooves 15 matched with the protrusions 14. The first box body 1 and the second box body 2 are mounted and fixed with the shock pads 12 through the protrusions 14 and the insertion grooves 15, the locking is more reliable, and the first box body 1 and the second box body 2 are connected in a left-right structure, which can ensure the sealing between the first box body 1 and the second box body 2. When replacing, the whole needs to be replaced.

[0035] The transmission component can accurately transmit, has a better mute effect, and is convenient to install, so as to meet the transmission requirements of the electric adjustment of the automobile seat. The variable position worm wheel 3 and the variable position worm 4 are adopted, so that the strength of the transmission structure is balanced, the coincidence degree of transmission is improved, and the noise is reduced.

[0036] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A horizontal drive gear box for a car seat comprising a gear box body, said gear box body comprising a first box (1) and a second box (2), characterized in that: The first box (1) and the second box (2) are buckled, and a driving structure for driving the horizontal movement of the automobile seat is arranged in the cavity formed by the first box (1) and the second box (2), the driving structure comprises a variable position worm wheel (3) and a variable position worm (4) engaged with the variable position worm wheel (3).

2. A horizontal drive gear box for a car seat as claimed in claim 1, wherein: The variable position worm (4) adopts tooth profile variable position, positive variable position of tooth thickness, the variable position worm wheel (3) adopts tooth profile positive variable position, negative variable position of tooth thickness, the tooth profile variable position coefficient of the variable position worm (4) is x1 relative to the standard worm, the tooth thickness variable position coefficient of the variable position worm (4) is g1, the tooth profile variable position coefficient of the variable position worm wheel (3) is x2 relative to the standard worm wheel, the tooth thickness variable position coefficient of the variable position worm wheel (3) is g2, and -0.2 < x1 < 0.2, 0 < g1 < 0.5, 0 < x2 < 0.4, -0.5 < g2 < 0.

3. A horizontal drive gear box for a car seat as claimed in claim 1, wherein: The first box (1) is provided with a positioning pin (6) and a guide pin (7), the second box (2) is provided with a positioning pin hole (8) matched with the positioning pin (6), a guide pin hole (9) matched with the guide pin (7), and the guide pin (7) is in the shape of a key groove.

4. A horizontal drive gear box for a car seat according to claim 3, characterized in that: The variable position worm wheel (3) is provided with plastic bearings (5) at both ends for mounting the first box (1) and the second box (2), the first box (1) and the second box (2) are provided with mounting grooves (10) for mounting the variable position worm wheel, and one side of the first box (1) and the second box (2) is provided with a mounting hole (11) for mounting the variable position worm (4).

5. A horizontal drive gear box for a car seat as claimed in claim 3, wherein: The gear box is provided with shock pads (12) on both sides, and the shock pads (12) are provided with positioning holes (13) for positioning the plastic bearings (5).

6. A horizontal drive gear box for a car seat as claimed in claim 4, wherein: The plastic bearings (5) adopt a four-corner structure and are positioned in the gear box.

7. A horizontal drive gear box for a car seat as claimed in claim 5, wherein: The first box (1) and the second box (2) are provided with protrusions (14) on both sides for mounting the shock pads (12), and the shock pads (12) are provided with insertion grooves (15) matched with the protrusions (14).

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