Soft release alternating current electromagnetic brake

Abstract

The utility model discloses a soft-release alternating-current electromagnetic brake, relates to the technical field of brakes, and solves the technical problems of high braking and releasing noise caused by serious impact between an armature assembly and a magnet yoke assembly during braking and releasing due to complete fixation of the magnet yoke of the conventional alternating-current electromagnetic brake. Comprising a fan housing, an end cover arranged on an end opening of the fan housing, an internal spring fastening structure, a magnet yoke assembly, an armature assembly, a gear sleeve and a brake disc assembly, wherein the magnet yoke assembly, the armature assembly, the gear sleeve and the brake disc assembly are arranged in the fan housing; wherein the brake disc assembly is arranged between the end cover and the armature assembly, the gear sleeve is arranged in the brake disc assembly, the magnet yoke assembly is arranged between the armature assembly and the fan cover, and the magnet yoke assembly is arranged on a sleeve in the fan cover in a sleeving mode; according to the utility model, the armature assembly and the magnet yoke assembly are pressed in the rear end cover and the fan housing of the motor by using the spring fastening structure, so that the magnet yoke assembly is not in a completely fixed state, the attraction performance is relatively soft, very large impact is not generated, and the attraction noise is relatively low.

Description

Technical Field

[0001] The utility model belongs to the technical field of brakes, and in particular relates to a soft-release AC electromagnetic brake. Background Art

[0002] AC electromagnetic brakes are generally composed of motor end cover, yoke assembly, armature assembly, gear sleeve, brake disc assembly, main spring, mounting screw, etc. AC brakes are widely used due to their fast braking speed.

[0003] At present, the existing AC brake has a yoke assembly fixed on the mounting screw with a nut and cannot move, while the armature assembly can slide up and down along the mounting screw. When the brake coil is energized, the armature assembly slides toward the yoke under the action of the electromagnetic force, relieving the pressure on the brake disc, so that the brake disc can rotate and the brake is in a released state. When the power is off, the electromagnetic force disappears, and the armature assembly presses against the brake disc assembly under the action of the main spring force. The brake disc cannot rotate, the brake is in a braking state, and the motor connected to the brake is also braked, so the motor cannot rotate. In the current AC electromagnetic brake, because the yoke is completely fixed, the armature assembly and the yoke assembly collide severely during braking and release, resulting in relatively loud braking and release noises.

[0004] Therefore, based on the above problems, we designed a soft-release AC electromagnetic brake. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a soft-release AC electromagnetic brake, which solves the technical problem that the armature assembly and the yoke assembly collide severely during braking and releasing, resulting in relatively loud braking and releasing noises, due to the complete fixation of the yoke in the prior art AC electromagnetic brake.

[0006] To achieve the above-mentioned purpose, according to the embodiment of the first aspect of the utility model, a soft-release AC electromagnetic brake is provided, comprising an air hood, an end cover arranged on the port of the air hood, an internal spring fastening structure, and a yoke assembly, an armature assembly, a gear sleeve and a brake disc assembly arranged in the air hood;

[0007] The brake disc assembly is arranged between the end cover and the armature assembly, the gear sleeve is arranged inside the brake disc assembly, the yoke assembly is arranged between the armature assembly and the wind hood, and the yoke assembly is sleeved on a sleeve inside the wind hood.

[0008] A further improvement is that the yoke assembly includes a yoke shell and a yoke insert arranged in the yoke shell, and the yoke insert includes a yoke, several skeletons sleeved on the yoke and a coil stuck in the port of each skeleton. After the yoke and coil are installed in the yoke shell, they are fixed by pouring epoxy resin to form a whole.

[0009] A further improvement is that the brake disc assembly includes a brake disc, a pair of friction plates symmetrically arranged on the brake disc, and a stainless steel friction disc arranged on the friction plates.

[0010] A further improvement is that the armature assembly comprises an armature plate and an armature arranged on the armature plate.

[0011] A further improvement is that the spring fastening structure includes several main springs, mounting screws, preload springs and hollow bolts, and the outside of the yoke housing is provided with several evenly distributed main spring holes and mounting holes, and several main springs are respectively arranged in the main spring holes to compress the armature assembly to generate a braking torque after the wind hood and the end cover are installed.

[0012] A further improvement is that several of the preload springs are respectively arranged in the mounting holes, and the mounting screws are connected to the end cover through hollow bolts. During assembly, the entire brake can be fixed to the end cover at the rear of the motor by turning the mounting screws and the hexagonal shape at the lower end of the hollow bolt.

[0013] A further improvement is that the brake also includes a pair of release shafts and a tool magazine brake handle that is movably clamped on the pair of release shafts, and assembly holes for installing the release shafts are provided on both sides of the end cover. The end of each release shaft is flat, and the release shaft is located on the armature plate after installation.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model presses the armature assembly and the yoke assembly into the rear end cover and the wind cover of the motor by using a spring fastening structure so that the yoke assembly is not in a completely fixed state, so that the suction performance is softer, no particularly large impact is generated, and the suction noise is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the entire brake structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall explosion structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the partial explosion structure of the utility model.

[0019] Markings in the figure:

[0020] 1. Tool magazine brake handle; 11. Release shaft;

[0021] 2. End cap;

[0022] 3. Wind hood;

[0023] 4. yoke assembly; 41. yoke housing; 411. main spring hole; 412. mounting hole; 42. yoke insert; 421. yoke; 422. skeleton; 423. coil;

[0024] 5. armature assembly; 51. armature plate; 52. armature;

[0025] 6. Gear sleeve;

[0026] 7. Brake disc assembly; 71. Brake disc; 72. Friction plate; 73. Stainless steel friction disc;

[0027] 8. Spring fastening structure; 81. Main spring; 82. Mounting screw; 83. Preload spring; 84. Hollow bolt. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 and Figure 2 As shown, a soft-release AC electromagnetic brake comprises an air hood 3, an end cover 2 arranged on the port of the air hood 3, an internal spring fastening structure 8, and a yoke assembly 4, an armature assembly 5, a gear sleeve 6 and a brake disc assembly 7 arranged in the air hood 3;

[0030] The brake disc assembly 7 is arranged between the end cover 2 and the armature assembly 5, the gear sleeve 6 is arranged inside the brake disc assembly 7, the yoke assembly 4 is arranged between the armature assembly 5 and the wind shield 3, and the yoke assembly 4 is sleeved on the sleeve inside the wind shield 3;

[0031] like Figure 2 and Figure 3 As shown, the yoke assembly 4 specifically includes: a yoke housing 41 and a yoke insert 42 disposed in the yoke housing 41, the yoke insert 42 includes a yoke 421, a plurality of skeletons 422 sleeved on the yoke 421 and a coil 423 clamped in a port of each skeleton 422, and after the yoke 421 and the coil 423 are installed in the yoke housing 41, epoxy resin is poured to fix them and form a whole;

[0032] The brake disc assembly 7 specifically includes: a brake disc 71, a pair of friction plates 72 symmetrically arranged on the brake disc 71, and a stainless steel friction disc 73 arranged on the friction plates 72;

[0033] The armature assembly 5 specifically includes: an armature plate 51 and an armature 52 arranged on the armature plate 51. Both sides of the end cover 2 are penetrated with assembly holes for installing the release shaft 11. The end of each release shaft 11 is flat. The release shaft 11 is located on the armature plate 51 after installation. The release shaft 11 and the tool magazine brake handle 1 are used for manual adjustment.

[0034] The spring fastening structure 8 specifically includes: several main springs 81, mounting screws 82, pre-tightening springs 83 and hollow bolts 84. The outside of the yoke housing 41 is provided with several evenly distributed main spring holes 411 and mounting holes 412. Several main springs 81 are respectively arranged in the main spring holes 411 and are distributed in a circular shape so as to compress the armature assembly 5 to generate a braking torque after the wind hood 3 and the end cover 2 are installed; several pre-tightening springs 83 are respectively arranged in the mounting holes 412, and the mounting screws 82 are connected to the end cover 2 through the use of hollow bolts 84.

[0035] like Figures 1 to 3 As shown, in this embodiment, it should be noted that the actual size of each component in the application document is selected for installation according to the actual needs on site. Before implementation, several holes for installing the hollow bolts 84 are set on the armature plate 51. When the armature plate 51 is installed, the armature plate 51 can slide along the hollow bolts 84. At this time, several preload springs 83 are compressed to generate a rebound force for protection, preventing the installation screw 82 and the hollow bolt 84 from being damaged by excessive torque. In addition, it should be noted that this application document is only for AC electromagnetic brakes. Because the yoke 421 is completely fixed, the armature assembly 5 and the yoke assembly 4 collide severely during braking and release, resulting in improvements on the shortcomings of relatively large braking and release noises, and does not involve other aspects; the working principle of this soft-release AC electromagnetic brake is introduced as follows:

[0036] During assembly, the staff places the yoke assembly 4, the armature assembly 5, the brake disc assembly 7 and the gear sleeve 6 in the wind cover 3, and then screws the installation screw 82 and the hexagonal shape at the lower end of the hollow bolt 84 to press the entire brake onto the end cover 2 at the rear of the motor. At this time, several main springs 81 press the armature assembly 5 to generate braking torque after the wind cover 3 and the end cover 2 are installed;

[0037] When the coil 423 inside the electromagnetic brake is energized, the yoke 421 generates a magnetic field, and the armature assembly 5 moves toward the yoke assembly 4. Since the yoke 421 is not completely fixed, the yoke assembly 4 will also move toward the armature assembly 5. This makes the attraction performance softer, does not produce a particularly large impact, and the attraction noise is relatively small.

[0038] When the electromagnetic brake is powered off, the armature assembly 5 moves toward the brake disc assembly 7 under the action of the main spring 81. Since the yoke assembly 4 is not completely fixed, the braking performance of the armature assembly 5 will not be so strong and the braking noise will be relatively small.

[0039] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A soft release AC electromagnetic brake, characterized in that: It comprises an air hood (3), an end cover (2) arranged on a port of the air hood (3), an internal spring fastening structure (8), and a yoke assembly (4), an armature assembly (5), a gear sleeve (6), and a brake disc assembly (7) arranged in the air hood (3); The brake disc assembly (7) is arranged between the end cover (2) and the armature assembly (5), the gear sleeve (6) is arranged inside the brake disc assembly (7), the yoke assembly (4) is arranged between the armature assembly (5) and the wind hood (3), and the yoke assembly (4) is sleeved on a sleeve inside the wind hood (3).

2. A soft-release AC electromagnetic brake according to claim 1, characterized in that: The yoke assembly (4) comprises a yoke housing (41) and a yoke insert (42) arranged in the yoke housing (41); the yoke insert (42) comprises a yoke (421), a plurality of skeletons (422) sleeved on the yoke (421), and a coil (423) clamped in a port of each skeleton (422); after the yoke (421) and the coil (423) are installed in the yoke housing (41), epoxy resin is poured to fix them, and they form a whole.

3. The soft-release AC electromagnetic brake according to claim 1, characterized in that: The brake disc assembly (7) comprises a brake disc (71), a pair of friction plates (72) symmetrically arranged on the brake disc (71), and a stainless steel friction disc (73) arranged on the friction plates (72).

4. The soft-release AC electromagnetic brake according to claim 1, characterized in that: The armature assembly (5) comprises an armature plate (51) and an armature (52) arranged on the armature plate (51).

5. The soft-release AC electromagnetic brake according to claim 2, characterized in that: The spring fastening structure (8) comprises a plurality of main springs (81), a mounting screw (82), a preload spring (83) and a hollow bolt (84); the outside of the yoke housing (41) is provided with a plurality of evenly distributed main spring holes (411) and mounting holes (412); and the plurality of main springs (81) are respectively arranged in the main spring holes (411).

6. A soft-release AC electromagnetic brake according to claim 5, characterized in that: A plurality of the preload springs (83) are respectively arranged in the mounting holes (412), and the mounting screw rod (82) is connected to the end cover (2) by means of a hollow bolt (84) for use.

7. The soft-release AC electromagnetic brake according to claim 1, characterized in that: The brake also includes a pair of release shafts (11) and a tool magazine brake handle (1) movably clamped on the pair of release shafts (11); assembly holes for installing the release shafts (11) are provided through both sides of the end cover (2); the end of each release shaft (11) is flat; and the release shaft (11) is located on the armature plate (51) after installation.

Images