CN114215863A

CN114215863A - Disc brake

Info

Publication number: CN114215863A
Application number: CN202111488138.7A
Authority: CN
Inventors: 许大甜; 钱士亮; 吴骏; 徐国良; 蒙世雄
Original assignee: Zhejiang Matuo Machinery Manufacturing Co ltd; Zhejiang Mato Drive Equipment Co ltd
Current assignee: Zhejiang Matuo Machinery Manufacturing Co ltd; Zhejiang Mato Drive Equipment Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-03-22

Abstract

The invention discloses a disc brake, which comprises a fixed plate (1), wherein a plurality of mounting bolts (3) which are connected with a base (2) are arranged on the fixed plate (1), a spline disc assembly (4) is arranged on the inner side of the fixed plate (1), at least two movable plates (5) are arranged between the fixed plate (1) and the spline disc assembly (4), the movable plates (5) are penetrated through by the corresponding mounting bolts (3), all the movable plates (5) are positioned on the same plane, an electromagnetic coil (6) is arranged in each movable plate (5), the electromagnetic coil (6) leans to one side of the fixed plate (1), a guide mechanism is arranged between each movable plate (5) and the fixed plate (1), a blind hole is formed in each movable plate (5), and a compression spring (8) connected with the fixed plate (1) is arranged in each blind hole. The invention has the advantages of low cost of the traction machine, easy assembly, low noise and easy installation.

Description

Disc brake

Technical Field

The invention belongs to the field of disc brakes.

Background

The disc brake is a conventional brake on a hoisting machine. The structure of current disc brake, including deciding the board, decide to be equipped with a plurality of solenoid in the board, decide the frame that the board passes through a plurality of construction bolts and connects the hauler, the inboard of deciding the board is equipped with movable plate and spline dish subassembly in proper order, the movable plate with pass by construction bolts, be equipped with compression spring between movable plate and the deciding the board, be equipped with the blind hole that leads to and receive compression spring on deciding the inside wall of board, the main shaft of hauler is connected to the spline dish subassembly, splined connection between spline dish subassembly and the main shaft, the both sides of spline dish subassembly all are equipped with the friction disc.

The working principle of the existing disc brake is that when a tractor does not work, an electromagnetic coil in a fixed plate is not electrified, a movable plate and a spline disc assembly are pressed on a base under the action of a compression spring, the spline disc assembly cannot rotate along with a main shaft under the action of friction force, and the brake is in a braking state; when the tractor works, the electromagnetic coil is electrified, the movable plate is attracted by the electromagnetic coil to overcome the elastic force of the compression spring and lean against the fixed plate, the spring elastic force borne by the spline disc assembly disappears, the pressure between the spline disc assembly and the base disappears, the spline disc assembly can rotate along with the main shaft, and the braking force on the tractor disappears.

In GB7588, "all brake mechanical parts participating in the braking force applied to the braking surface should be divided into at least two groups", two existing disc brakes need to be configured on one tractor to meet the requirements, and the number of configured disc brakes is large, resulting in high cost of the tractor.

Because the fixed plate is connected with the base of the traction machine and has large stress, the fixed plate is generally of an integral structure and cannot be made into a split type. Because the electromagnetic coil needs to be accommodated in the fixed plate, certain thickness is required, and in order to ensure the deformation stroke of the compression spring, the thickness of the fixed plate needs to be over a certain degree, so that the thickness is difficult to thin, the weight of the fixed plate is heavy, the fixed plate is difficult to move, and the assembly of the disc brake is difficult.

It is still to discover in the in-service use, and current disc brake's noise reaches more than 60 decibels, and the noise is great, when using in no computer lab elevator, gives sound insulation because of lacking the computer lab, and the noise can pass to the car the inside through the well, influences the user and takes experience, and the room and the pavement that are close to the elevator well also can hear the noise of stopper, cause noise pollution to near resident's life.

In addition, when the brake is installed, the gap of the brake formed by installation is generally required to be 0.25-0.4mm, namely, the reciprocating movement distance of the movable plate and the friction plate assembly is 0.25-0.4mm in the on-off state of the electromagnetic coil, when the brake is installed, a plurality of installation bolts need to be adjusted repeatedly, the gap of the brake can reach 0.25-0.4mm while the brake is ensured to be uniform, then nuts on the installation bolts need to be screwed, and the problem that the installation of the brake is troublesome due to the fact that the installation bolts loosen again is avoided.

Therefore, the conventional disc brake has disadvantages that it causes high cost, difficulty in assembly, loud noise and troublesome installation of the traction machine.

Disclosure of Invention

The invention aims to provide a disc brake. The invention has the advantages of low cost of the traction machine, easy assembly, low noise and easy installation.

The technical scheme of the invention is as follows: the disc brake comprises a fixed plate, wherein three to six mounting bolts which are connected with a base are arranged on the fixed plate, a spline disc assembly is arranged on the inner side of the fixed plate, at least two movable plates are arranged between the fixed plate and the spline disc assembly and are penetrated by the corresponding mounting bolts, all the movable plates are positioned on the same plane, an electromagnetic coil is arranged in each movable plate and leans against one side of the fixed plate, a guide mechanism is arranged between each movable plate and the fixed plate, a blind hole is formed in each movable plate, and a compression spring connected with the fixed plate is arranged in each blind hole.

In the disc brake, the guide mechanism includes at least two guide holes disposed on the movable plate, guide pins fixed to the fixed plate are disposed in the guide holes, and outer chamfers are disposed at ends of the guide pins.

In the disc brake, the mounting bolt is sleeved with the limiting sleeve, and one end of the limiting sleeve penetrates through the movable plate.

In the aforementioned disc brake, the movable plate has two or four pieces.

In the disc brake, friction plates are arranged on two sides of the spline disc assembly.

Compared with the prior art, the invention is improved on the basis of the prior disc brake as follows: first, the compression spring and the electromagnetic coil are moved to the movable plate, so that the thickness of the fixed plate can be reduced, the weight of the fixed plate is reduced, the moving is convenient, and the assembly of the brake is easy. Secondly, more than two movable plates are adopted, so that the weight of a single movable plate can be reduced, the movable plate is convenient to move, and the brake is easy to assemble; meanwhile, each movable plate is provided with an electromagnetic coil, so that more than two groups of brake mechanical parts applying braking force to a braking surface are arranged on one brake, and one traction machine only needs to be provided with one disc brake to meet the requirements in GB7588, thereby reducing the cost of the traction machine; on the basis of keeping the total elastic force of all compression springs unchanged, namely the brake braking force of the brake unchanged, and the electromagnetic attraction of the brake unchanged, the total weight of more than two movable plates in the invention is larger than the weight of a single movable plate in the existing brake, under the same elastic force of the compression springs and the same electromagnetic attraction, the moving speed is slower, the noise generated by collision with a base and collision with a fixed plate is smaller, namely the working noise of the brake is smaller, and can be reduced to be less than 50 decibels. Thirdly, the mounting bolt is provided with the limiting sleeve, the distance between the fixed plate and the base of the tractor is determined by the inherent length of the limiting sleeve, namely, a worker only needs to screw down the mounting bolt to ensure that the clearance of the brake is determined to be unique and uniform, the clearance is ensured to reach 0.25-0.4mm, repeated adjustment is not needed, and the mounting difficulty of the brake is reduced. Therefore, the invention has the advantages of lower cost of the traction machine, easy assembly, low noise and easy installation.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the movable plate of embodiment 1.

Fig. 3 is a left side view of the movable plate of embodiment 2.

Fig. 4 is a left side view of the movable plate of embodiment 3.

The labels in the figures are: the method comprises the following steps of 1-a fixed plate, 2-a machine base, 3-a mounting bolt, 4-a spline disc assembly, 5-a movable plate, 6-an electromagnetic coil, 7-a main shaft, 8-a compression spring, 9-a cylindrical surface, 10-a guide pin, 11-a limiting sleeve and 12-a friction plate.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example 1. Disc brake, as shown in fig. 1, including annular fixed plate 1, fixed plate 1 is the steel sheet, be equipped with four construction bolts 3 that all are used for being connected with frame 2 on the fixed plate 1, the inboard of fixed plate 1 is equipped with spline dish subassembly 4, spline dish subassembly 4 is located between four construction bolts 3, spline dish subassembly 4 and the 7 splined connections of main shaft of hauler, be equipped with two movable plates 5 between fixed plate 1 and the spline dish subassembly 4, every movable plate 5 is passed by two construction bolts 3, two movable plates 5 are in the coplanar, be equipped with an solenoid 6 in the movable plate 5, solenoid 6 leans on fixed plate 1 one side, be equipped with guiding mechanism between movable plate 5 and the fixed plate 1, be equipped with the blind hole on the movable plate 5, be equipped with the compression spring 8 of being connected with fixed plate 1 in the blind hole.

The guide mechanism comprises two guide holes arranged on the movable plate 5, guide pins 10 fixed with the fixed plate 1 are arranged in the guide holes, and outer chamfers are arranged at the end parts of the guide pins 10.

The mounting bolt 3 is sleeved with a limiting sleeve 11, one end of the limiting sleeve 11 penetrates through the movable plate 5 and then abuts against the top plate 1, the other end of the limiting sleeve 11 abuts against the base 2, and the limiting sleeve 11 is in clearance fit with the movable plate 5.

Friction plates 12 are arranged on two sides of the spline disk assembly 4.

The two movable plates 5 surround to form an annular plate group, the outer diameter of the plate group is the same as that of the fixed plate 1, and the inner diameter of the plate group is the same as that of the fixed plate 1. A left side view of the plate package is shown in fig. 2.

The test shows that the working noise of the embodiment 1 is 52.7 dB.

Example 2. Unlike the embodiment 1, the movable plate 5 has four movable plates 5, the left side view of the plate group formed by the four movable plates 5 is shown in fig. 3, each movable plate 5 is penetrated by one mounting bolt 3, and each movable plate 5 has two guide holes.

The test shows that the working noise of the embodiment 2 is 51.4 dB.

Embodiment 1 is more convenient to assemble the stopper because of the larger number of the movable plates 5 than embodiment 2, but also requires more time for processing because of the larger number of the movable plates 5.

Example 3. Unlike embodiment 1, there are three guide holes, two of which are located near both ends of the movable plate 5, the remaining guide holes are located at the middle of the movable plate 5, and two electromagnetic coils 6 are provided in the middle of the adjacent guide holes. As shown in fig. 4, the axes of the three guide holes and the axes of the two electromagnetic coils 6 are all on the same cylindrical surface 9, the cylindrical surface 9 is coaxial with the movable plate 5, the centers of the two electromagnetic coils 6 are connected to form a straight line 14, the movable plate 5 on one side of the straight line 14 is marked as a region M, the movable plate 5 on the other side of the straight line 14 is marked as a region N, and the area of the region M is equal to the area of the region N by adjusting the radius size of the cylindrical surface 9.

Compared with the embodiment 3, the embodiment 1 has lower noise reaching 49.2dB, the guide pin 10 is less prone to wear, and the brake is maintained less frequently.

Example 4. Unlike embodiment 1, the number of the mounting bolts 3 is three or six.

Claims

1. Disc brake, its characterized in that: including deciding board (1), be equipped with three to six construction bolt (3) that all are used for being connected with frame (2) on deciding board (1), the inboard of deciding board (1) is equipped with spline dish subassembly (4), it is equipped with two piece at least movable plates (5) to decide between board (1) and spline dish subassembly (4), movable plate (5) are passed by construction bolt (3) that correspond, all movable plates (5) all are in the coplanar, be equipped with solenoid (6) in movable plate (5), solenoid (6) lean on to deciding board (1) one side, be equipped with guiding mechanism between movable plate (5) and deciding board (1), be equipped with the blind hole on movable plate (5), be equipped with compression spring (8) of being connected with deciding board (1) in the blind hole.

2. The disc brake of claim 1, wherein: the guide mechanism comprises at least two guide holes arranged on the movable plate (5), guide pins (10) fixed with the fixed plate (1) are arranged in the guide holes, and outer chamfers are arranged at the end parts of the guide pins (10).

3. The disc brake of claim 1, wherein: the mounting bolt (3) is sleeved with a limiting sleeve (11), and one end of the limiting sleeve (11) penetrates through the movable plate (5).

4. The disc brake of claim 1, wherein: the movable plate (5) is provided with two or four blocks.

5. The disc brake of claim 1, wherein: friction plates (12) are arranged on two sides of the spline disc assembly (4).