CN211035012U

CN211035012U - Synchronous guide structure of brake

Info

Publication number: CN211035012U
Application number: CN201922084642.5U
Authority: CN
Inventors: 周峰萍; 吴志超; 钦小铭; 高英
Original assignee: Zhejiang Mato Drive Equipment Co ltd
Current assignee: Zhejiang Mato Drive Equipment Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-07-17
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a synchronous guide structure of a brake, which comprises a hollow bolt (11) fixed on an electromagnet assembly (10), wherein the hollow bolt (11) is in clearance fit with an armature assembly (20); the electromagnet assembly (10) is also provided with a guide post (12), and the armature assembly (20) is provided with an oilless bearing (21) matched with the guide post (12); the guide posts (12) are positioned in the middle of the electromagnet assembly (10), and the number of the guide posts is not more than 4. The utility model discloses taken into account manufacturing cost and direction synchronism, action synchronism when armature actuation/release is high, and the good reliability of braking consequently can protect passenger's safety better. Moreover, the utility model discloses effectively reduced sliding part's degree of wear, increase of service life.

Description

Synchronous guide structure of brake

Technical Field

The utility model relates to a synchronous guide structure of hauler stopper.

Background

The brake is an important braking and safety component in the traction machine, and the reliability of the brake directly affects the safety of the whole elevator operation, which is not a little worth. The tractor brakes used by most manufacturers in the current market adopt 4 hollow bolts as a guide device of a brake armature. The hollow bolt and the corresponding hole are not only guiding structures, but also main stress components. Meanwhile, 4 hollow bolts are positioned at 4 corners of the brake, and the over-positioning condition exists. Therefore, if the existing hollow bolt and hole structure is high in machining precision, the corresponding part cost and assembly labor requirements are high, and if the machining precision is low, the guide gap is too large, so that the situation that the brake armature shakes easily in the action process is caused, the action synchronism of actuation/release of the armature is reduced, and serious situations such as blocking and the like occur.

In addition, the existing guide structure is almost matched with a bolt and a unthreaded hole, an axial sliding part is not arranged, the sliding part is easy to wear, and the service life is relatively short.

Therefore, the conventional traction machine brake guide structure has the problems that the equipment cost and the guide synchronism cannot be simultaneously achieved, and the abrasion is easy.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a synchronous guide structure of stopper. The utility model discloses taken into account manufacturing cost and direction synchronism, action synchronism when armature actuation/release is high, and the good reliability of braking consequently can protect passenger's safety better. Moreover, the utility model discloses effectively reduced sliding part's degree of wear, increase of service life.

The technical scheme of the utility model: a synchronous guide structure of a brake comprises a hollow bolt fixed on an electromagnet assembly, wherein the hollow bolt is in clearance fit with an armature assembly; the electromagnet assembly is also provided with a plurality of guide posts, and the armature assembly is provided with oilless bearings matched with the guide posts; the guide post is located electromagnet assembly middle part.

In the synchronous guide structure of the brake, the number of the guide posts is 1-3.

In the synchronous guide structure of the brake, the guide post is fixed on the electromagnet assembly through an axial screw.

In the synchronous guide structure of the brake, the screw is not higher than the end surface of the guide post.

In the synchronous guide structure of the brake, a chamfer is arranged on an end face of the guide post.

In the synchronous guide structure of the brake, an annular groove is formed on a hole wall of the armature assembly for mounting the oilless bearing.

Compared with the prior art, the utility model discloses utilize the combination of hollow bolt and guide post, hollow bolt only needs lower machining precision requirement as main stress parts, and the guide post is then regarded as the guide part, and the atress is little, and is located the middle part, is difficult to appear crossing the location and leads to shaking the dead problem of card. Moreover, between guide post and the oilless bearing, on the one hand because the guide post is located the middle part, on the other hand because the oilless bearing has lubricated effect, therefore cooperation between them is more smooth, makes the action synchronism of armature higher, and the stopper good reliability. Due to the lubricating effect of the oilless bearing, the abrasion condition of the guide column can be reduced, and the service life can be prolonged.

Furthermore, the utility model discloses a guide post installs on electromagnet assembly, and atress partial dimension is great, and safety margin is sufficient, is difficult to appear crooked or cracked problem under emergency.

Furthermore, the ring groove on the wall of the armature hole is used as a gas chamber of the gas lubrication type oilless bearing. When the armature component is about to be completely attracted or released and the guide post is completely positioned in the oilless bearing, the air chamber can ensure that enough air flow in the oilless bearing plays a role in lubrication.

To sum up, the utility model discloses compromise manufacturing cost and direction synchronism, action synchronism when armature actuation/release is high, and the good reliability of braking consequently can protect passenger's safety better, provides more comfortable taking advantage of terraced experience. Moreover, the utility model discloses effectively reduced sliding part's degree of wear, increase of service life.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram of a guide post according to a first embodiment;

FIG. 3 is a schematic structural view of a guide post according to a second embodiment.

Reference numerals: 10-electromagnet assembly, 11-hollow bolt, 12-guide column, 20-armature assembly, 21-oilless bearing and 22-ring groove.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended as a limitation to the present invention.

The first embodiment is as follows: a synchronous guide structure of a brake comprises a hollow bolt 11 fixed on an electromagnet assembly 10, wherein the hollow bolt 11 is in clearance fit with an armature assembly 20. The electromagnet assembly 10 is further provided with a guide post 12, and the armature assembly 20 is provided with an oilless bearing 21 matched with the guide post 12. The guide posts 12 are located in the middle of the electromagnet assembly 10 and are 1-3 in number, preferably 2 in number.

As shown in fig. 2, the guiding column 12 is a cylinder, and a through hole is formed at the axis and fixed on the electromagnet assembly 10 through an axial screw, and the screw is not higher than the end surface of the guiding column 12 and can be simply understood as a countersunk head screw. And a chamfer is arranged on the end surface of the guide post 12.

The armature assembly 20 has a circumferential groove 22 in the bore wall for receiving the oilless bearing 21. The oilless bearing 21 is preferably a gas lubrication type oilless bearing 21, which is low in cost. The ring groove 22 communicates with the air hole of the oilless bearing 21.

In operation, the armature is attracted for example. The electromagnet assembly 10 is energized to create an attractive force against the armature assembly 20, and the armature assembly 20 is proximate to the electromagnet assembly 10. The hollow bolt 11 on the electromagnet assembly 10 is in clearance fit with the through hole of the armature assembly 20 and is used as a main stress component and an auxiliary guide component. The cooperation of the guide post 12 and the oilless bearing 21 is the main guide member. Because the two are slightly influenced by over-positioning and are smoothly matched, the action synchronism of the whole armature component 20 is high, and the problem of shaking and clamping is not easy to occur. When the armature assembly 20 is completely attracted, the armature assembly 20 is very close to the electromagnet assembly 10, the oilless bearing 21 is not smooth relative to the external air flow, and the air chamber provides a place for air flow to ensure the air lubrication effect.

On the other hand, since the guide post 12 is fixed to the electromagnet assembly 10, the force receiving part of the guide post 12, that is, the part buried in the electromagnet can be made large, and the safety margin is sufficient. Even in an unexpected situation, the guide post 12 is not easily broken by the impact of the radial force.

Example two: the shape of the guide post 12 is not limited. In this embodiment, the components other than the guide post 12 are the same as those of the first embodiment. As shown in fig. 3, the guide post 12 of the present embodiment has a stepped cylindrical shape.

Claims

1. A synchronous guide structure of stopper, includes hollow bolt (11) of fixing on electro-magnet subassembly (10), its characterized in that: the hollow bolt (11) is in clearance fit with the armature component (20); the electromagnet assembly (10) is also provided with a plurality of guide posts (12), and the armature assembly (20) is provided with oilless bearings (21) matched with the guide posts (12); the guide post (12) is positioned in the middle of the electromagnet assembly (10).

2. A synchronous brake guiding structure as defined in claim 1, wherein: the number of the guide columns (12) is 1-3.

3. A synchronous brake guiding structure as defined in claim 1, wherein: the guide column (12) is fixed on the electromagnet assembly (10) through an axial screw.

4. A synchronous brake guiding structure as defined in claim 3, wherein: the screw is not higher than the end face of the guide column (12).

5. A synchronous brake guiding structure as defined in claim 1, wherein: and a chamfer is arranged on the end surface of the guide post (12).

6. A synchronous brake guiding structure as defined in claim 1, wherein: and a ring groove (22) is arranged on the hole wall of the armature iron component (20) for mounting the oilless bearing (21).