CN211501491U

CN211501491U - Gear assembly for adjusting automobile seat backrest

Info

Publication number: CN211501491U
Application number: CN202020056486.1U
Authority: CN
Inventors: 苏辰鸣; 胡宗君
Original assignee: Zhejiang Donghe Electromechanical Manufacturing Co ltd
Current assignee: Zhejiang Donghe Electromechanical Manufacturing Co ltd
Priority date: 2020-01-11
Filing date: 2020-01-11
Publication date: 2020-09-15
Anticipated expiration: 2030-01-11

Abstract

The utility model belongs to the technical field of auto-parts, refer in particular to a gear assembly for car seat back is adjusted. Including gear shaft and the worm wheel subassembly that links to each other with the gear shaft, the gear shaft includes internal connection section and outer joint section, is equipped with a plurality of external teeth on the internal connection section, the worm wheel subassembly includes intermeshing's worm wheel and worm, and the connecting hole has been seted up to the worm inside, be equipped with on the connecting hole inner wall with external tooth intermeshing's internal tooth, the external tooth part of internal connection section is inserted and is established in the connecting hole, be equipped with the keyway section on the outer joint section, seted up a plurality of keyways on the keyway section. The utility model discloses be equipped with the keyway section on the gear shaft for being connected of gear shaft and motor carries out zonulae occludens between motor, gear shaft, worm and the worm wheel, thereby drives the worm wheel motion more steadily, makes its lead screw that drives its inside move, whole compact structure and stability.

Description

Gear assembly for adjusting automobile seat backrest

Technical Field

The utility model belongs to the technical field of auto-parts, refer in particular to a gear assembly for car seat back is adjusted.

Background

The car is as people's widely used vehicle, in the higher and higher while of people's standard of living, the travelling comfort is also emphated more to automobile manufacturer, especially at this one of car seat, current car seat, driver's seat and copilot seat especially, can carry out the regulation of the fore-and-aft distance of seat height and back according to actual demand usually, when the seat carries out fore-and-aft distance or high lift adjustment, adopt motor cooperation lead screw subassembly to adjust usually, drive belt drive gear transmission through worm wheel lead screw, adjust seat height and back angle and fore-and-aft distance, current worm wheel lead screw contains lead screw and worm wheel, carry out the interact through being connected between lead screw directness and the worm wheel, the structure is stable inadequately.

Disclosure of Invention

The utility model aims at providing a gear assembly for car seat back is adjusted promotes the interact between worm wheel and the lead screw through setting up gear shaft and worm for the structure is more stable.

The purpose of the utility model is realized like this:

the utility model provides a gear assembly for car seat back is adjusted, includes gear shaft and the worm wheel subassembly that links to each other with the gear shaft, the gear shaft includes internal connection section and outer linkage section, is equipped with a plurality of external teeth in the internal connection section, the worm wheel subassembly includes intermeshing's worm wheel and worm, the inside connecting hole of having seted up of worm, be equipped with on the connecting hole inner wall with external tooth intermeshing's internal tooth, the external tooth part of internal connection section is inserted and is established in the connecting hole, be equipped with the keyway section on the outer linkage section, seted up a plurality of keyways in the keyway section, form the tooth's socket between two adjacent external teeth, the tooth's socket with the keyway is linked together, and the keyway both sides form the connection key, connect key and external.

Further, the circumferential surface of the inner connecting section is provided with an annular clamping groove, and a clamping spring is arranged between the annular clamping groove and the wall of the connecting hole.

Further, the periphery of the gear shaft is electroplated and coated with an anti-rust layer.

It is further provided that the end face of the keyway section facing the outward connecting section is inclined inward to form a conical surface.

Further, the inclination angle of the conical surface is 65 degrees +/-2.5 degrees, the inner side of the conical surface is in transition connection with the outer connecting section through an arc, and the radius of the arc is not more than 0.5 mm.

The worm wheel assembly further comprises a shell, the worm wheel and the worm are arranged inside the shell, a middle hole used for being connected with the screw rod is formed in the middle of the worm wheel, a through hole is formed in the shell and is coaxial with the middle hole, and the screw rod penetrates through the through hole and the middle hole.

Further, fixing platforms are formed at two ends of the worm, an installation cavity is formed in the shell, and a sealing connecting piece is arranged between the periphery of each fixing platform and the inner wall of the installation cavity.

Further, the two ends of the worm are respectively formed with connecting ends, and a shaft sleeve is arranged between the periphery of each connecting end and the installation cavity.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

the utility model discloses a worm wheel subassembly includes worm wheel and worm, worm wheel and worm intermeshing, simultaneously, be connected with the gear shaft on the worm, be connected through the intermeshing of internal tooth and external tooth between gear shaft and the worm, be equipped with the keyway section on the gear shaft for being connected of gear shaft and motor carries out zonulae occludens between motor, gear shaft, worm and the worm wheel, thereby drive the worm wheel motion more steadily, make its lead screw that drives its inside move, whole compact structure and stability.

Drawings

FIG. 1 is a schematic view of the structure of a gear shaft of the present invention;

fig. 2 is a partial cross-sectional view of the present invention;

fig. 3 is a partial cross-sectional view of the gear shaft of the present invention;

fig. 4 is a partially enlarged view of fig. 3 at a.

Fig. 5 is a schematic view of the worm gear assembly of the present invention.

Fig. 6 is a sectional view of the worm gear assembly of the present invention.

Detailed Description

The invention will be further described with reference to specific embodiments, see fig. 1-6:

as shown in fig. 1-2, a gear assembly for adjusting a seat back of an automobile includes a gear shaft 1 and a worm gear assembly connected to the gear shaft 1, the gear shaft 1 comprises an inner connecting section 11 and an outer connecting section 12, a plurality of outer teeth 13 are arranged on the inner connecting section 11, the worm wheel component comprises a worm wheel 21 and a worm 22 which are mutually meshed, a connecting hole 23 is formed in the worm 22, inner teeth 24 which are mutually meshed with the outer teeth 13 are arranged on the inner wall of the connecting hole 23, the external teeth 13 of the internal connecting section 11 are inserted into the connecting holes 23, the external connecting section 12 is provided with a key groove section, the key groove section is provided with a plurality of key grooves 15, a tooth groove 16 is formed between two adjacent external teeth 13, the tooth groove 16 is communicated with the key grooves 15, connecting keys 17 are formed on two sides of each key groove 15, the connecting keys 17 are in smooth transition connection with the external teeth 13, and the surfaces of the connecting keys 17 are smoothly arranged. The internal connection section of gear shaft passes through the external tooth and is connected with the internal tooth meshing in the connecting hole for be connected between gear shaft and the worm inseparabler, strengthen the stability keyway that both are connected and communicate with each other with the tooth's socket, make processing more convenient, and the structure is also more reasonable.

As shown in fig. 2 and 3, the circumferential surface of the inner connecting section 11 is provided with an annular clamping groove 18, the annular clamping groove 18 is provided with a clamping spring 3 between the hole walls of the connecting holes 23, the clamping spring 3 is arranged to strengthen the connection between the inner connecting section and the worm, the worm is prevented from being separated from the inner connecting section due to axial movement caused by vibration in the using process, and the structural stability between the inner connecting section and the worm is enhanced.

The periphery of the gear shaft 1 is electroplated and coated with an anti-rust layer, because the gear and the worm gear need oil liquid to lubricate in the working process, the surface of the gear shaft is easily rusted after long-time working, so that the anti-rust layer needs to be additionally arranged on the surface of the gear shaft, the anti-rust capability of the gear shaft is improved, and the service life of the gear shaft is prolonged.

As shown in fig. 4, the end surface of the key groove section facing the outer connecting section 12 is inclined inward to form a conical surface 141, the inclined angle of the conical surface 141 is 65 ° ± 2.5 °, the inner side of the conical surface 141 is transitionally connected with the outer connecting section 12 through an arc 142, and the radius of the arc 142 is not more than 0.5 mm. With conical surface angle design 65, can make to have tighter connection between gear shaft and the motor, compare planar design and can be more stable, smooth and smooth transitional coupling can reduce the rigidity collision between limit and the limit, avoids the part impaired.

As shown in fig. 5-6, the worm wheel assembly further includes a housing 5, the worm wheel 21 and the worm 22 are disposed inside the housing 5, a middle hole 25 for connecting a lead screw is formed in the middle of the worm wheel 21, a through hole 51 is formed in the housing 5, the through hole 51 and the middle hole 25 are coaxially disposed, and the lead screw penetrates through the through hole 51 and the middle hole 25. The shell wraps up the whole worm and gear assembly, and the dustproof and noise-reducing effect can be effectively achieved.

Fixed platforms 26 are formed at two ends of the worm wheel 21, an installation cavity 52 is formed in the shell 5, and a sealing connecting piece 7 is arranged between the periphery of the fixed platform 26 and the inner wall of the installation cavity 52. Connecting ends 27 are formed at two ends of the worm 22 respectively, and a shaft sleeve 8 is arranged between the periphery of the connecting end 27 and the mounting cavity 52. The sealing connecting piece 7 and the shaft sleeve are made of plastics and have certain shock absorption performance, the sealing connecting piece and the shaft sleeve are additionally arranged at the connecting positions of the end parts of the shell and the worm, the shell and the worm wheel, so that shock can be greatly reduced, noise generated by collision between rigid connection can be reduced, and a better shock absorption and noise reduction effect is achieved.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a gear assembly for car seat back is adjusted, includes gear shaft (1) and the worm wheel subassembly that links to each other with gear shaft (1), its characterized in that: the gear shaft (1) comprises an inner connecting section (11) and an outer connecting section (12), a plurality of external teeth (13) are arranged on the inner connecting section (11), the worm wheel component comprises a worm wheel (21) and a worm (22) which are mutually meshed, a connecting hole (23) is formed in the worm (22), inner teeth (24) which are mutually meshed with the outer teeth (13) are arranged on the inner wall of the connecting hole (23), the external tooth part of the internal connecting section (11) is inserted into the connecting hole (23), be equipped with the keyway section on outer linkage segment (12), seted up a plurality of keyways (15) on the keyway section, formed tooth's socket (16) between two adjacent external teeth (13), tooth's socket (16) with keyway (15) are linked together, and keyway (15) both sides form connecting key (17), and connecting key (17) and external tooth (13) rounding off are connected, and connecting key (17) surface sets up smoothly.

2. The gear assembly for vehicle seat back adjustment according to claim 1, wherein: the circumferential surface of the inner connecting section (11) is provided with an annular clamping groove (18), and a clamping spring (3) is arranged between the annular clamping groove (18) and the hole wall of the connecting hole (23).

3. The gear assembly for vehicle seat back adjustment according to claim 1, wherein: the periphery of the gear shaft (1) is plated with an anti-rust layer.

4. The gear assembly for vehicle seat back adjustment according to claim 1, wherein: the end face of the keyway section facing the outward connecting section (12) is inclined inward to form a tapered surface (141).

5. The gear assembly for vehicle seat back adjustment according to claim 4, wherein: the inclination angle of the conical surface (141) is 65 degrees +/-2.5 degrees, the inner side of the conical surface (141) is in transition connection with the outer connecting section (12) through an arc (142), and the radius of the arc (142) is not more than 0.5 mm.

6. A gear assembly for adjustment of a seat back of a vehicle according to any of claims 1-5, wherein: the worm wheel assembly further comprises a shell (5), the worm wheel (21) and the worm (22) are arranged inside the shell (5), a middle hole (25) used for being connected with the screw rod is formed in the middle of the worm wheel (21), internal threads are arranged in the middle hole (25), a through hole (51) is formed in the shell (5), the through hole (51) and the middle hole (25) are coaxially arranged, and the screw rod penetrates through the through hole (51) and the middle hole (25).

7. The gear assembly for vehicle seat back adjustment according to claim 6, wherein: the two ends of the worm wheel (21) are molded with fixing platforms (26), the shell (5) is internally provided with an installation cavity (52), and a sealing connecting piece (7) is arranged between the periphery of the fixing platforms (26) and the inner wall of the installation cavity (52).

8. The gear assembly for vehicle seat back adjustment according to claim 7, wherein: the connecting ends (27) are formed at the two ends of the worm (22) respectively, and a shaft sleeve (8) is arranged between the periphery of each connecting end (27) and the corresponding mounting cavity (52).