CN212909237U

CN212909237U - Single worm wheel lead screw fixing structure of lifting motor

Info

Publication number: CN212909237U
Application number: CN202021039406.8U
Authority: CN
Inventors: 李臻; 罗永鸿; 肖伟兵; 闫鲲
Original assignee: Shenzhen Power Motor Industrial Co Ltd
Current assignee: Shenzhen Power Motor Industrial Co Ltd
Priority date: 2020-06-06
Filing date: 2020-06-06
Publication date: 2021-04-06
Anticipated expiration: 2030-06-06

Abstract

The utility model relates to a single worm wheel lead screw fixing structure of a lifting motor, which comprises a lead screw component and a box body; the screw rod assembly comprises a worm wheel, the worm wheel comprises a shaft part, the inner wall of the shaft part is connected with a screw rod in a meshed mode, a plurality of horizontal gaskets are respectively sleeved on the outer walls of two ends of the shaft part in a sleeved mode, and a waveform gasket is arranged between every two adjacent horizontal gaskets; the box body comprises a worm wheel groove for containing the worm wheel, a worm groove for containing the worm and an opening for the lead screw to penetrate through, a meshing hole for communicating the worm groove is formed in the bottom wall of the worm wheel groove, first bosses are respectively arranged on two sides of the worm wheel groove, and the first bosses correspond to the horizontal gaskets in position. The single worm wheel screw rod fixing structure has the advantages of compact structure and capability of realizing stable operation of the worm wheel.

Description

Single worm wheel lead screw fixing structure of lifting motor

Technical Field

The utility model belongs to the technical field of small-size direct current motor and specifically relates to a single worm wheel lead screw fixed knot of lifting motor constructs.

Background

Modern automobile seats are mostly electrically adjustable, also called electric seats. People's evaluation of automobile comfort is mostly felt through seats, so that electric seats equipped on cars must meet two requirements of convenience and comfort, namely, a driver can obtain the best view and conveniently operate a steering wheel, a pedal, a gear lever and the like through operating keys, and the seats can be adjusted to the best position to obtain the most comfortable and habitual riding angle.

In the lifting process of the automobile seat, the threaded screw rod is driven to do linear reciprocating motion from rotary motion through the matching of the motor and the nut, and the seat beam is driven to do up-and-down motion through the matching of the threaded screw rod assembly and the pin mechanism of the seat, so that the seat is driven to lift.

At present, the box volume of single worm wheel lead screw output gear box is great, and gear box inner structure is compact inadequately to fixed worm wheel that can not be fine, consequently in the lift operation process, the worm wheel operation is steady easily not hard up inadequately, can reduce worm wheel life for a long time, causes the cracked condition of worm wheel to take place.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compact structure can realize the single worm wheel lead screw fixed knot that the worm wheel operates steadily and construct.

In view of the above circumstances, there is a need for a single worm screw fixing structure of a lifting motor, which includes a screw assembly and a box body;

the screw rod assembly comprises a worm wheel, the worm wheel comprises a shaft part, the inner wall of the shaft part is connected with a screw rod in a meshed mode, a plurality of horizontal gaskets are respectively sleeved on the outer walls of two ends of the shaft part in a sleeved mode, and a waveform gasket is arranged between every two adjacent horizontal gaskets;

the box body comprises a worm wheel groove for containing the worm wheel, a worm groove for containing the worm and an opening for the lead screw to penetrate through, a meshing hole for communicating the worm groove is formed in the bottom wall of the worm wheel groove, first bosses are respectively arranged on two sides of the worm wheel groove, and the first bosses correspond to the horizontal gaskets in position.

Furthermore, the screw rod sequentially comprises a connecting part, a bearing part, a tooth meshing part and a thread part from right to left, a connecting hole for connecting a pin is formed in the connecting part, the tooth meshing part is meshed with the inner wall of the shaft part, and the thread part is connected with a nut.

Further, the connecting portion is flat.

Further, a bearing is nested in the connecting hole, and the inner wall of the bearing is connected with the pin.

Furthermore, a limiting ring is sleeved on the outer wall of one end, close to the tooth engaging part, of the bearing part.

Furthermore, a limiting groove is formed in the position, corresponding to the limiting ring, of the bearing part.

Further, the spacing ring is "C" shape.

Further, the worm wheel groove is U-shaped.

Further, the utility model provides a single worm wheel lead screw fixed knot constructs is still including being used for covering worm wheel groove top open-ended case lid, the case lid with the connection can be dismantled to the terminal surface in worm wheel groove.

Furthermore, a bayonet is arranged on the top surface of the worm wheel groove, and a second boss is arranged on the box cover corresponding to the bayonet.

Furthermore, a hand support part is arranged on the top surface of the box cover.

Furthermore, the box body is made of thermoplastic plastics.

The beneficial effects of the utility model reside in that:

1. through set up the wave form gasket between adjacent horizontal gasket, can adjust the clearance in worm wheel, flat gasket and worm wheel groove, can realize that the worm wheel operates steadily, the wave form gasket is a regular wavy circular thin slice that is, and mainly used prevents not hard up, and the slow shock needs to possess good elasticity and performance such as shock resistance.

2. The utility model discloses a box design makes the space perpendicular distance of input axis and output axis reduce, effectively reduces the long wide size of product, has reduced gear box's volume, satisfies the installation requirement in narrow and small space for gear box overall structure is compacter.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is an exploded view of the overall structure of the embodiment of the present invention.

Fig. 3 is an exploded view of the screw assembly according to the embodiment of the present invention.

Fig. 4 is a schematic view of a worm wheel structure according to an embodiment of the present invention.

Fig. 5 is a split view of the screw rod structure according to the embodiment of the present invention.

Fig. 6 is a schematic view of a first view angle structure of the box body according to the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a second view angle of the box body according to the embodiment of the present invention.

Fig. 8 is a schematic view of a first view angle structure of a case cover according to an embodiment of the present invention.

Fig. 9 is a schematic view of a second view structure of the case cover according to the embodiment of the present invention.

In the figure:

the screw rod assembly 100, the worm wheel 110, the shaft part 111, the screw rod 120, the connecting part 121, the connecting hole 1211, the bearing part 122, the limiting groove 1221, the tooth engaging part 123, the threaded part 124, the bearing 125, the limiting ring 126, the horizontal gasket 130 and the wave-shaped gasket 140;

the worm gear box comprises a box body 200, a worm gear groove 210, a meshing hole 211, a bayonet 212, a worm groove 220, an opening 230 and a first boss 240;

the case cover 300, the second boss 310 and the hand rest part 320.

Detailed Description

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following description, in conjunction with the accompanying drawings and embodiments, will explain the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 to 7, in a specific embodiment of the present invention, a single worm screw fixing structure mainly includes a screw assembly 100 and a box 200.

Wherein, lead screw subassembly 100 includes worm wheel 110, and worm wheel 110 includes axial region 111, and a lead screw 120 is connected in the inner wall meshing of axial region 111, overlaps respectively on the both ends outer wall of axial region 111 to be equipped with a plurality of horizontal gaskets 130, is equipped with a wave form gasket 140 between two adjacent horizontal gaskets 130, in a preferred embodiment, overlaps respectively on the both ends outer wall of axial region 111 to be equipped with two horizontal gaskets 130, and horizontal gasket 130 is used for the load of dispersion worm wheel 110, and the reduction vibration is in order to expand wearing and tearing.

It can be understood that, by arranging the wave-shaped gasket 140 between the adjacent horizontal gaskets 130, the gap between the worm wheel 110, the horizontal gasket 130 and the worm wheel groove 210 can be adjusted, so that the worm wheel 110 can run stably, and the wave-shaped gasket is a regular wave-shaped circular thin sheet which is mainly used for preventing looseness and buffering and needs to have good elasticity, impact resistance and other properties.

The box body 200 comprises a worm wheel groove 210 for accommodating the worm wheel 110, a worm groove 220 for accommodating the worm and an opening 230 for the lead screw 120 to pass through, the bottom wall of the worm wheel groove 210 is provided with an engaging hole 211 for communicating with the worm groove 220, two sides of the worm wheel groove 210 are respectively provided with a first boss 240, the first bosses 240 correspond to the horizontal gasket 130, and the opening 230 is in a U shape in a preferred embodiment, so that the space is saved to the maximum extent, and the lead screw 120 is supported.

The utility model relates to a principle: when the worm inserts in the worm groove 110, be connected with worm wheel 110 meshing through meshing hole 211, lead screw 120 is connected with the meshing of the axial region 111 inner wall of worm wheel 110, for realizing the steady rotation of worm wheel 110, be equipped with two or more than two horizontal gasket 130 respectively at the both ends of axial region 111, be equipped with a wave form gasket 140 between two adjacent horizontal gasket 130, make the gasket can be fixed to support through setting up first boss 240, make the bearing of worm both sides can fix the chucking through setting up opening 230, make compact structure like this, and the space vertical distance of input axis and output axis reduces, effectively reduce the long wide size of product, the volume of gearbox casing has been reduced, satisfy the installation requirement in narrow and small space.

Referring to fig. 5, in an embodiment of the present invention, the screw rod 120 sequentially includes a connecting portion 121, a receiving portion 122, a tooth engaging portion 123 and a screw portion 124 from right to left, the connecting portion 121 is provided with a connecting hole 1211 for connecting a pin, the tooth engaging portion 123 is engaged with an inner wall of the shaft portion 111, and the screw portion 124 is connected with a nut; the connecting part 121 is used for connecting a pin of the electric seat of the automobile, the bearing part 122 is used for connecting the connecting part 121 and the tooth engaging part 123, the thread part 124 is used for matching with a nut, and the screw rod 120 is driven by a worm to linearly reciprocate from a rotating motion.

It should be mentioned that the teeth of the engaging tooth portion 123 may be straight teeth or helical teeth, preferably helical teeth, and the helical teeth can improve the contact ratio of the gear engagement, make the gear transmission smooth, and reduce noise.

In order to fix the pin more firmly in the coupling hole 1211, the coupling portion 121 may be formed in a flat shape such that nuts may be respectively mounted at both ends of the pin.

Referring to fig. 5, when the pin is disposed in the connection hole 1211, since the motor drives the screw rod 120 to move, the pin and the connection hole 1211 are likely to collide with each other, which causes noise generated by the lifting component of the car seat, in order to reduce the noise, a bearing 125 may be nested in the connection hole 1211, and the inner ring of the bearing 125 is smooth, which effectively reduces the friction coefficient between the pin and the bearing 125, and reduces the noise generated by the lifting component of the car seat.

Referring to fig. 5, in order to prevent the screw rod 120 from coming off during the linear motion process and damaging the lifting structure of the car seat, and to improve the safety, a limiting ring 126 may be sleeved on an outer wall of one end of the receiving portion 122 close to the engaging tooth portion 123, and when the screw rod 120 moves in the horizontal direction until the limiting ring 126 abuts against the box body 200, the screw rod 120 is prevented from further moving in the horizontal direction; considering that if the power transmitted by the worm drive is too large, the screw rod 120 moves in the horizontal direction to quickly generate large kinetic energy, and thus the limit ring 126 may be broken to have an effect of limiting the maximum process of the screw rod 120, a limit groove 1221 may be disposed at a position corresponding to the position of the receiving portion 122 and the limit ring 126, and the limit ring 126 is disposed in the limit groove 1221, so that even if the screw rod 120 moves too fast in the horizontal direction, a reaction force may be effectively provided to balance the impact force by a height difference between the limit groove 1221 and the outer wall of the receiving portion 122, thereby protecting the limit ring 126 and ensuring the effect of limiting the maximum process of the screw rod 120.

The limiting ring 126 is aged and broken after long-term use, so that the limiting ring 126 can be arranged into a C shape, and is convenient to disassemble and replace.

Referring to fig. 7, in an embodiment of the present invention, the worm wheel groove 210 may be formed in a "U" shape to maximize space saving and make the overall structure of the gear box more compact.

Referring to fig. 8, in order to prevent external factors from interfering with the inside of the gear box in an embodiment of the present invention, a box cover 300 may be disposed at the top opening of the worm gear groove 210, and the box cover 300 may be detachably connected to the end surface of the worm gear groove 210, such as screwed, buckled, abutted, or plugged, but the screwed connection is preferred because the cost advantage is obvious due to the simple operation and manufacturing process.

Referring to fig. 8, in order to limit the horizontal shaking of the case cover 300, a bayonet 212 may be disposed on the top surface of the worm groove 210, and a second boss 310 is disposed on the case cover 300 corresponding to the bayonet 212, so that the purpose can be achieved by engaging the bayonet 212 with the second boss 310.

Referring to fig. 9, in order to facilitate the removal of the cover, a hand rest 320 may be disposed on the top surface of the cover 300.

It should be mentioned that the box body 200 of the present invention can be made of metal or plastic material, preferably thermoplastic plastic, and under certain temperature condition, the plastic can be softened or melted into any shape, and the shape is not changed after cooling; this state can be repeated many times with plasticity all the time, and the repetition is only a physical change, and thermoplastics include polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyoxymethylene, polycarbonate, polyamide, acrylic plastics, other polyolefins and copolymers thereof, polysulfone, polyphenylene oxide, and the like.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims

1. A single worm wheel screw rod fixing structure of a lifting motor is characterized by comprising a screw rod assembly (100) and a box body (200);

the screw rod assembly (100) comprises a worm wheel (110), the worm wheel (110) comprises a shaft part (111), the inner wall of the shaft part (111) is connected with a screw rod (120) in a meshed mode, a plurality of horizontal gaskets (130) are respectively sleeved on the outer walls of two ends of the shaft part (111), and a waveform gasket (140) is arranged between every two adjacent horizontal gaskets (130);

the box body (200) comprises a worm wheel groove (210) used for accommodating the worm wheel (110), a worm groove (220) used for accommodating the worm and an opening (230) used for the lead screw (120) to penetrate through, a meshing hole (211) used for communicating the worm groove (220) is formed in the bottom wall of the worm wheel groove (210), first bosses (240) are respectively arranged on two sides of the worm wheel groove (210), and the first bosses (240) correspond to the horizontal gasket (130).

2. The single worm gear lead screw fixing structure of the lifting motor as claimed in claim 1, wherein the lead screw (120) comprises a connecting portion (121), a receiving portion (122), a tooth engaging portion (123) and a threaded portion (124) in sequence from right to left, the connecting portion (121) is provided with a connecting hole (1211) for connecting a pin, the tooth engaging portion (123) is engaged with the inner wall of the shaft portion (111), and the threaded portion (124) is connected with a nut.

3. The single worm screw fixing structure of a lifting motor as claimed in claim 2, wherein the connection part (121) is formed in a flat shape.

4. The single worm screw fixing structure of a lifting motor as claimed in claim 2, wherein a bearing (125) is nested in the connecting hole (1211), and the inner wall of the bearing (125) is connected with the pin.

5. The single worm gear and screw rod fixing structure of the lifting motor as claimed in claim 2, wherein a limiting ring (126) is sleeved on the outer wall of one end of the bearing part (122) close to the engaging tooth part (123).

6. The single worm gear and screw rod fixing structure of the lifting motor as claimed in claim 5, wherein a position corresponding to the position of the limit ring (126) is provided with a limit groove (1221) at the bearing part (122).

7. The single worm screw fixing structure of a lifting motor as claimed in claim 5 or 6, wherein the limiting ring (126) is 'C' -shaped.

8. The single worm screw fixing structure of a lifting motor as claimed in claim 1, wherein the worm groove (210) is 'U' -shaped.

9. The single worm screw fixing structure of the lifting motor as claimed in claim 1, further comprising a cover (300) for covering the top opening of the worm groove (210), wherein the cover (300) is detachably coupled to the end surface of the worm groove (210).

10. The single worm screw fixing structure of a lifting motor as claimed in claim 9, wherein a bayonet (212) is provided on a top surface of the worm groove (210), and a second boss (310) is provided on the cover (300) at a position corresponding to the bayonet (212).