CN216078197U

CN216078197U - Transmission structure convenient to maintain

Info

Publication number: CN216078197U
Application number: CN202121776961.3U
Authority: CN
Inventors: 凌人; 花家碧
Original assignee: Guangzhou Xunfeng Rail Transit Technology Co ltd
Current assignee: Guangzhou Xunfeng Rail Transit Technology Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-03-18
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a transmission structure convenient to maintain, which is used for a platform door and comprises a motor, a gear in driving connection with the motor and a rack in meshing transmission with the gear, wherein the rack extends along the movement direction of the platform door, the rack is made of a metal material, and part or all of the gear is made of a non-metal material. The novel steel pipe is convenient to overhaul, and the difficulty of overhauling and replacing is greatly reduced.

Description

Transmission structure convenient to maintain

Technical Field

The utility model relates to the technical field of transmission structures of platform doors, in particular to a transmission structure convenient to maintain.

Background

The platform doors include full height doors and half height doors. The full-height door is also called a shield door, and the half-height door is also called a safety door. At present, the platform door also widely uses a gear and a rack for meshing transmission, and has high transmission precision and strong stability. The strength based on the gear and the rack is nevertheless sufficiently great that the service life of the transmission arrangement for the platform door is relatively long. However, after long-term use, when the gear or the rack is damaged, the maintenance difficulty still needs to be faced, especially when the rack is worn, the machine body needs to be disassembled, so that the replacement of the rack is completed, and the maintenance difficulty is greatly improved due to the common hidden installation of the gear and the rack.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide the transmission structure which is convenient to maintain, is convenient to overhaul and greatly reduces the difficulty of overhauling and replacing.

The purpose of the utility model is realized by adopting the following technical scheme:

the transmission structure convenient to maintain is used for the platform door, and the transmission structure comprises a motor, a gear connected with the motor in a driving mode, and a rack meshed with the gear in a transmission mode, wherein the rack extends along the motion direction of the platform door, the rack is made of a metal material, and part or all of the gear is made of a non-metal material.

Furthermore, the gear comprises a shaft core and a transmission body, gear teeth of the gear are arranged on the transmission body, and the shaft core is detachably sleeved in the transmission body; the shaft core is made of a metal material, and the transmission body is made of a non-metal material.

Further, the transmission body is made of a plastic material.

Further, the motor is connected with a transmission shaft; the shaft core is provided with a first inner hole, and the transmission shaft is sleeved in the first inner hole; one of the first inner hole of the shaft core and the transmission shaft is provided with a first key groove, the other one of the first inner hole of the shaft core and the transmission shaft is provided with a first transmission key, and the first key groove is matched with the first transmission key; the shaft core is radially provided with at least one side hole penetrating through the side wall of the shaft core, and the side hole is fixedly connected with the transmission shaft through a first screw.

Furthermore, the transmission body is provided with a second inner hole, one of the second inner hole of the transmission body and the shaft core is provided with a second key groove, the other one of the second inner hole of the transmission body and the shaft core is provided with a second transmission key, the shaft core is sleeved in the second inner hole, and the second transmission key is matched with the second key groove.

Furthermore, the second key grooves and the second transmission keys are provided with a plurality of second transmission keys which are distributed in a circumferential array around the axis of the shaft core, and the plurality of second transmission keys are respectively in one-to-one corresponding connection with the plurality of second key grooves.

Furthermore, a concave platform is arranged on the upper end surface of the transmission body, and the bottom of the concave platform is communicated with the first inner hole; the concave table is internally provided with a flange, and the flange is fixedly connected with the shaft core through a second screw.

Furthermore, the second key groove is arranged on the transmission body, and the second transmission key is arranged on the shaft core; the second screw is connected with the second transmission key of the shaft core.

Further, the second screws are provided with a plurality of second screws, and the plurality of second screws are distributed in a circumferential array around the axis of the flange.

Compared with the prior art, the utility model has the beneficial effects that:

the rack is made of a metal material, and part or all of the gear is made of a non-metal material. So, because the intensity and the wearability of gear all are poor than the rack to make the in-process of gear and rack meshing transmission, the gear is the wearing parts, thereby slows down the consume speed of rack, therefore often only need when overhauing change the gear can. Moreover, the replacement of the gear only needs to deal with the sleeving connection, and compared with the replacement of the rack, the difficulty is low, so that the difficulty of overhauling and replacing the gear is greatly reduced.

Drawings

FIG. 1 is a schematic view of the present invention in the form of a transmission (rack not shown) for ease of maintenance;

FIG. 2 is an exploded view of the easy-to-maintain transmission shown in FIG. 1;

FIG. 3 is another perspective view of FIG. 2;

FIG. 4 is an illustration of the transmission configuration of FIG. 1 in operation for ease of maintenance;

fig. 5 is a partially enlarged view of a portion a of fig. 4.

In the figure: 1. a motor; 2. a speed reducer; 3. a gear; 31. a shaft core; 311. a first inner bore; 312. a first keyway; 313. a side hole; 314. a first screw; 315. a second drive key; 32. a transmission body; 321. a second inner bore; 322. a second keyway; 323. a concave platform; 4. a rack; 5. a drive shaft; 51. a first drive key; 6. a flange; 7. a second screw; 8. a platform door.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used herein, "vertical," "horizontal," "left," "right," and similar expressions are for purposes of illustration only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 5, a transmission structure for facilitating maintenance according to a preferred embodiment of the present invention is used for a platform door 8, and includes a motor 1, a speed reducer 2 connected to the motor 1, a gear 3 connected to the speed reducer 2, and a rack 4 engaged with the gear 3 for transmission. The rack 4 extends along the movement direction of the platform door 8, the rack 4 is made of metal material, and part or all of the gear 3 is made of non-metal material. Therefore, the strength and the wear resistance of the gear 3 are lower than those of the rack 4, so that the gear 3 is a quick-wear part in the process of meshing transmission of the gear 3 and the rack 4, the consumption speed of the rack 4 is reduced, and the gear 3 is usually required to be replaced during maintenance. Moreover, the replacement of the gear 3 only needs to deal with the sleeving relation, and compared with the replacement of the rack 4, the difficulty is much lower, so that the difficulty of overhauling and replacing is greatly reduced.

Preferably, the gear 3 comprises a shaft core 31 and a transmission body 32, the gear teeth of the gear 3 are arranged on the transmission body 32, and the shaft core 31 is detachably sleeved in the transmission body 32. The shaft core 31 is made of metal material, and the transmission body 32 is made of non-metal material. This arrangement makes it possible to make the transmission body 32 a wearing part and the shaft core 31 harder to wear than the transmission body 32, so that the transmission body 32 is a component to be replaced frequently, and the transmission body 32 and the shaft core 31 are in a socket joint relationship, so that the mounting and dismounting processes between the two are particularly simple, and the process of replacing the transmission body 32 is particularly simple. Preferably, the transmission body 32 is made of plastic, and it is understood that the transmission body 32 may be made of rubber or the like.

Preferably, a transmission shaft 5 is connected to the motor 1 to transmit the gear 3 through the transmission shaft 5. At this time, the motor 1, the speed reducer 2, and the transmission shaft 5 are connected in sequence. The shaft core 31 is provided with a first inner hole 311, and the transmission shaft 5 is sleeved in the first inner hole 311. One of the first inner hole 311 of the shaft core 31 and the transmission shaft 5 is provided with a first key groove 312, the other one is provided with a first transmission key 51, and the first key groove 312 is matched with the first transmission key 51. The shaft core 31 is radially provided with at least one side hole 313 penetrating through the side wall of the shaft core 31, and the side hole 313 is fixedly connected with the transmission shaft 5 through a first screw 314. Obviously, since it is not desirable to provide more first key grooves 312 or first transmission keys 51 on the transmission shaft 5, it is sufficient to connect the first screws 314 with the side holes 313 in the radial direction to reinforce the connection stability of the transmission shaft 5 with the shaft core 31.

Preferably, the transmission body 32 is provided with a second inner hole 321, one of the second inner hole 321 of the transmission body 32 and the shaft core 31 is provided with a second key groove 322, the other one is provided with a second transmission key 315, the shaft core 31 is sleeved in the second inner hole 321, and the second transmission key 315 is matched with the second key groove 322. The arrangement is that the transmission body 32 and the shaft core 31 are in a splicing relation, so that the quick mounting and dismounting functions are achieved, and the transmission relation is achieved to ensure the operation of the transmission body 32. It can be understood that, in order to improve the connection strength, preferably, the second key groove 322 and the second transmission key 315 are provided in plural numbers, the plural second transmission keys 315 are distributed in a circumferential array around the axis of the shaft core 31, and the plural second transmission keys 315 are respectively connected with the plural second key grooves 322 in a one-to-one correspondence manner.

Preferably, the upper end surface of the transmission body 32 is provided with a concave platform 323, and the bottom of the concave platform 323 is communicated with the first inner hole 311; the recessed portion 323 accommodates a flange 6, and the flange 6 is fixedly connected to the shaft core 31 by a second screw 7. With this arrangement, on the one hand, the axial play between the transmission body 32 and the shaft core 31 can be prevented, and on the other hand, the upper end surface of the gear 3 can be flat.

Preferably, the second key slot 322 is provided on the transmission body 32, and the second transmission key 315 is provided on the shaft core 31; the second screw 7 is connected with the second driving key 315 of the shaft core 31. At this time, the thickness of the position of the second transmission key 315 on the shaft core 31 is larger, and the shaft core is suitable for being connected with the second screw 7, so that the fixed connection between the shaft core 31 and the transmission body 32 is completed on the premise of ensuring the integral rigidity and strength of the shaft core 31. Preferably, the second screws 7 are provided in plurality, and the plurality of second screws 7 are distributed in a circumferential array around the axis of the flange 6.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. Transmission structure convenient to maintain for platform door (8), its characterized in that: including motor (1), with gear (3) that motor (1) drive is connected, with gear (3) meshing transmission's rack (4), rack (4) extend along the direction of motion of platform door (8), rack (4) adopt metal material to make, the part or the whole non-metal material that adopt of gear (3) make.

2. The maintenance facilitating transmission structure of claim 1, wherein: the gear (3) comprises an axial core (31) and a transmission body (32), gear teeth of the gear (3) are arranged on the transmission body (32), and the axial core (31) is detachably sleeved in the transmission body (32); the shaft core (31) is made of a metal material, and the transmission body (32) is made of a non-metal material.

3. The maintenance facilitating transmission structure of claim 2, wherein: the transmission body (32) is made of plastic materials.

4. The maintenance facilitating transmission structure of claim 2, wherein: the motor (1) is connected with a transmission shaft (5); the shaft core (31) is provided with a first inner hole (311), and the transmission shaft (5) is sleeved in the first inner hole (311); one of the first inner hole (311) of the shaft core (31) and the transmission shaft (5) is provided with a first key slot (312), the other one is provided with a first transmission key (51), and the first key slot (312) is matched with the first transmission key (51); the shaft core (31) is provided with at least one side hole (313) penetrating through the side wall of the shaft core (31) in the radial direction of the shaft core (31), and the side hole (313) is fixedly connected with the transmission shaft (5) through a first screw (314).

5. The maintenance facilitating transmission structure of claim 4, wherein: the transmission body (32) is provided with a second inner hole (321), one of the second inner hole (321) of the transmission body (32) and the shaft core (31) is provided with a second key groove (322), the other one is provided with a second transmission key (315), the shaft core (31) is sleeved in the second inner hole (321), and the second transmission key (315) is matched with the second key groove (322).

6. The maintenance facilitating transmission structure of claim 5, wherein: the second key grooves (322) and the second transmission keys (315) are provided with a plurality of transmission keys (315), the second transmission keys (315) are distributed in a circumferential array mode around the axis of the shaft core (31), and the second transmission keys (315) are connected with the second key grooves (322) in a one-to-one correspondence mode respectively.

7. The maintenance facilitating transmission structure of claim 5, wherein: a concave platform (323) is arranged on the upper end surface of the transmission body (32), and the bottom of the concave platform (323) is communicated with the first inner hole (311); a flange (6) is arranged in the concave platform (323), and the flange (6) is fixedly connected with the shaft core (31) through a second screw (7).

8. The maintenance facilitating transmission structure of claim 7, wherein: the second key groove (322) is arranged on the transmission body (32), and the second transmission key (315) is arranged on the shaft core (31); the second screw (7) is connected with the second transmission key (315) of the shaft core (31).

9. The maintenance facilitating transmission structure of claim 7, wherein: the second screws (7) are arranged in a plurality, and the second screws (7) are distributed in a circumferential array around the axis of the flange (6).