A brake

Abstract

The application discloses a kind of brakes. It includes brake coil seat, brake spring, armature, brake shoe seat and the friction plate assembled on brake shoe seat, brake shoe seat is fixed on armature, brake coil seat includes magnetic yoke, outer magnetic pole core and inner magnetic pole core, outer magnetic pole core and inner magnetic pole core are respectively fixed on the one side of magnetic yoke towards armature, and inner magnetic pole core and outer magnetic pole core are all by a plurality of magnetic conductive sheet laminated and formed.The magnetic pole core of brake of the application is laminated, and eddy current loss is reduced, and magnetic resistance is reduced magnetic loss reduces.Control coil seat and the air gap of armature are easy to control, and no coil slot is set on magnetic yoke, and processing difficulty is reduced, and process is simplified, and processing cost is reduced.Inner magnetic pole core and outer magnetic pole core are all by silicon steel or thin steel plate punching and laminated and formed, and eddy current loss is reduced, and magnetic resistance is reduced, and the utilization of material and electromagnetic performance are improved, and overall braking performance is excellent.

Description

Technical Field

[0001] This invention relates to a brake, and more particularly to a brake for a traction machine. Background Technology

[0002] In conventional brakes, the stator coil holder is machined from thick steel plate to create coil slots. To meet the requirements of electromagnetic force, the coil slots are relatively deep. Moreover, to improve the utilization rate of the coil (copper wire), annular coil slots are generally used, which makes the machining difficult. Ordinary steel plates have high eddy current losses and are prone to magnetic saturation due to high magnetic resistance, resulting in large magnetic losses. Therefore, it is necessary to increase the area of ​​the coil holder to increase the magnetic pole area to ensure sufficient electromagnetic force. Summary of the Invention

[0003] The purpose of this invention is to provide a brake with excellent braking performance.

[0004] The objective of this invention is achieved as follows.

[0005] A brake includes a brake coil seat, a brake spring, an armature, a brake shoe seat, and friction pads mounted on the brake shoe seat. The brake shoe seat is fixed on the armature. The brake coil seat includes a magnetic yoke, an outer magnetic pole core, and an inner magnetic pole core. The outer magnetic pole core and the inner magnetic pole core are respectively fixed on the side of the magnetic yoke facing the armature. Both the inner magnetic pole core and the outer magnetic pole core are formed by stacking several magnetic conductive sheets.

[0006] The above technical solution can be further improved as follows.

[0007] In a more specific design, the inner magnetic pole core is located inside the outer magnetic pole core, and the space between the inner and outer magnetic pole cores forms a coil slot for placing the coil. The width of the coil slot is uniformly set.

[0008] More specifically, the cross-sections of the outer and inner magnetic pole cores are rectangular, circular, or elliptical, and the cross-section of the coil slots is circular or elliptical.

[0009] In a more specific solution, the magnetic conductive sheet is formed by stamping silicon steel or thin steel plate, which reduces eddy current loss, lowers magnetic resistance, and improves material utilization and electromagnetic performance.

[0010] A more specific solution involves eliminating the coil slots on the magnetic yoke and using a steel plate instead, which reduces processing difficulty, simplifies the process, and lowers processing costs.

[0011] In a more specific design, the brake spring is installed within the spring hole of the magnetic yoke. Guide holes are provided on both the outer and inner magnetic pole cores. The brake spring passes through these guide holes and abuts against the armature. These guide holes enhance the stability of the brake spring. The spring force acts on both the magnetic yoke and the armature, while the magnetic yoke is not affected by the spring force, ensuring the brake's stiffness and reliable, stable braking torque. When the brake is operating, the spring force is applied to the magnetic yoke, and the yoke's stiffness guarantees the stability of the braking force.

[0012] A more specific design includes pre-drilled holes on both the outer and inner magnetic pole cores, a hollow threaded sleeve connected to the yoke by a threaded connection, and a sliding sleeve on the armature. The hollow threaded sleeve passes through the pre-drilled holes and the sliding sleeve, allowing the armature to slide freely along the hollow threaded sleeve. An installation bolt for connection to the traction machine is located inside the hollow threaded sleeve. The brake operates without jamming.

[0013] In a more specific design, the outer magnetic pole core and the yoke are evenly connected and fixed by several locking bolts. The yoke has a stepped hole on its side facing the armature, and the corresponding outer magnetic pole core has a first pin hole. The stepped locking bolt passes through the first pin hole and the stepped hole and is threaded into a locking nut. The locking bolt and the stepped hole contact each other through the stepped surface. The end face of the locking bolt head is flat and protrudes from the outer magnetic pole core. There is a gap between the end face of the locking bolt head and the armature. By controlling the gap between the end face of the locking bolt head and the armature, the air gap uniformity of the brake is adjusted, preventing deformation of the outer magnetic pole core and ensuring consistent gap.

[0014] In a more specific design, the armature has a countersunk groove corresponding to the head of the locking bolt, with a gap between the bottom of the countersunk groove and the end face of the locking bolt head. By controlling the depth of the countersunk groove and the flatness and thickness of the end face of the locking bolt head, the gap is controlled, and after normal gap adjustment, the gap at the four corners of the brake can be ensured to be uniform.

[0015] A more specific design includes clearance holes for both the outer and inner magnetic pole cores, with damping pads installed within these holes. A positioning screw hole is provided corresponding to each clearance hole on the yoke. The tail of a fixing screw passes through the nut and the positioning screw hole, extending into the clearance hole. The tail of the fixing screw abuts against one end face of the damping pad, while the other end face of the damping pad extends out of the clearance hole and abuts against the armature. The position of the damping pad is adjusted using the fixing screw to ensure stable brake noise performance.

[0016] The beneficial effects of this invention are as follows.

[0017] The magnetic pole cores of the brake of this invention are laminated, which reduces eddy current losses, lowers magnetic reluctance, and reduces magnetic losses. The air gap between the control coil holder and the armature is easy to control, and there are no coil slots on the magnetic yoke, reducing processing difficulty, simplifying the process, and lowering manufacturing costs. Both the inner and outer magnetic pole cores are stamped and laminated from silicon steel or thin steel plates, making manufacturing easy, reducing eddy current losses, lowering magnetic reluctance, improving material utilization and electromagnetic performance, and resulting in excellent overall braking performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1.

[0019] Figure 2 This is a schematic diagram of the internal structure of Example 1.

[0020] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0021] Figure 4 This is another internal structure diagram of Embodiment 1.

[0022] Figure 5 This is a schematic diagram of the structure of the inner magnetic pole core, outer magnetic pole core, and coil slot in Example 1.

[0023] Figure 6 This is a schematic diagram of the structure of the inner magnetic pole core, outer magnetic pole core, and coil slot in Example 2. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1, see Figures 1-6 As shown, a brake includes a brake coil seat 1, a brake spring 5, an armature 6, a brake shoe seat 61, and a friction plate 62 mounted on the brake shoe seat 61. The brake coil seat 1 includes a magnetic yoke 2, an outer magnetic pole core 3, and an inner magnetic pole core 4. The inner magnetic pole core 4 and the outer magnetic pole core 3 are mounted on the magnetic yoke 2, with the inner magnetic pole core 4 located inside the outer magnetic pole core 3. The space between the inner magnetic pole core 4 and the outer magnetic pole core 3 forms a coil slot 10 for placing the coil. The width of the coil slot 10 is uniformly distributed, meaning that the width is equal in most positions and varies in a very small number of positions.

[0026] Both the inner magnetic pole core 4 and the outer magnetic pole core 3 are formed by stamping and stacking several magnetically conductive sheets. Preferably, the magnetically conductive sheets are made of silicon steel or thin steel plates (i.e., steel plates with a thickness of less than 1 mm, typically 0.5 mm to 1 mm). The cross-sections of the outer contours of the outer magnetic pole core 3 and the inner magnetic pole core 4 are rectangular, circular, or elliptical, etc., and the coil slots 10 can be circular or elliptical, etc. The magnetic yoke 2 is made of ordinary steel plate, eliminating the need for machining the coil slots 10 for placing the coils, thus reducing machining difficulty, simplifying the process, and lowering machining costs.

[0027] Specifically, the magnetic yoke 2 has a stepped hole 21 on the side facing the armature 6, and the corresponding outer magnetic pole core 3 has a first pin hole 31. The stepped locking bolt 11 passes through the first pin hole 31 and the stepped hole 21 and is threadedly connected to the locking nut 12. The locking bolt 11 and the stepped hole 21 are in contact through the stepped surface. The end face of the locking bolt 11 head is flat and protrudes from the outer magnetic pole core 3. The armature 6 has a countersunk groove 60 corresponding to the head of the locking bolt 11. The gap δ is left between the bottom surface of the countersunk groove 60 and the end face of the head of the locking bolt 11. The inner magnetic pole core 4 is fixed to the magnetic yoke 2 by a reamed hole screw 13. By adjusting and controlling the depth of the countersunk groove 60 and the flatness and thickness of the end face of the locking bolt 11 head, the gap δ is controlled. After normal gap adjustment, the gap δ at the four corners of the brake can be made uniform.

[0028] The outer magnetic pole core 3 and the inner magnetic pole core 4 are respectively provided with a reserved hole 14 and a clearance through hole 15. The magnetic yoke 2 is threadedly connected to a hollow threaded sleeve 7, and the armature 6 is provided with a sliding sleeve 63. The hollow threaded sleeve 7 passes through the reserved hole 14 and the sliding sleeve 63, and the armature 6 slides freely along the hollow threaded sleeve 7. The hollow threaded sleeve 7 is provided with a mounting bolt 8 for connection with the traction machine. That is, the mounting bolt 8 passes through the hollow threaded sleeve 7 to install the brake on the traction machine.

[0029] A shock-absorbing pad 16 is provided inside the clearance through hole 15. The magnetic yoke 2 is provided with a positioning screw hole 22 corresponding to the clearance through hole 15. The tail of the fixing screw 9 passes through the nut 17 and the positioning screw hole 22 and extends into the clearance through hole 15. The tail of the fixing screw 9 abuts against one end face of the shock-absorbing pad 16, and the other end face of the shock-absorbing pad 16 extends out of the clearance through hole 15 and abuts against the armature 6.

[0030] The brake spring 5 is installed in the spring hole 23 of the magnetic yoke 2. Both the magnetic pole core and the outer magnetic pole core 3 are provided with guide holes 18. After passing through the corresponding guide holes 18, the brake spring 5 abuts against the armature 6.

[0031] Friction pad 62 is attached to brake shoe seat 61. Brake shoe seat 61 assembly is fixed to armature 6 by screws and pins. When the brake is working, the spring force of brake spring 5 pushes armature 6 and brake shoe seat 61 assembly fixed thereon toward brake wheel. Friction pad 62 attached to brake shoe seat 61 rubs against brake wheel to provide braking torque.

Claims

1. A brake comprising a brake coil seat, a brake spring, an armature, a shoe seat and a friction plate assembled on the shoe seat, the shoe seat being fixed on the armature, characterized in that, The brake coil seat comprises a magnetic yoke, an outer magnetic pole core and an inner magnetic pole core, the outer magnetic pole core and the inner magnetic pole core are fixed on the side of the magnetic yoke facing the armature, and the inner magnetic pole core and the outer magnetic pole core are both formed by laminating a plurality of magnetic conductive sheets; The inner magnetic pole core is located in the outer magnetic pole core, and the space between the inner magnetic pole core and the outer magnetic pole core forms a coil slot for accommodating the coil, and the width of the coil slot is uniformly arranged.

2. The brake of claim 1 wherein, The outer contour of the outer magnetic pole core and the inner magnetic pole core is rectangular or circular or elliptical, and the cross section of the coil slot is circular or elliptical.

3. The brake of claim 1 wherein, The magnetic conductive sheet is punched and formed from silicon steel or thin steel plate.

4. The brake of claim 1 wherein, The magnetic yoke is not provided with a coil slot, and the magnetic yoke is a steel plate.

5. The brake of claim 1 wherein the brake is a disc brake. The moving spring is installed in the spring hole of the magnetic yoke, the magnetic pole core and the outer magnetic pole core are both provided with a guide through hole, and the brake spring abuts against the armature after passing through the corresponding guide through hole.

6. The brake of claim 1 wherein, The outer magnetic pole core and the inner magnetic pole core are respectively provided with a reserved hole, the magnetic yoke is threadedly connected with a hollow sleeve, the armature is provided with a sliding sleeve, the hollow sleeve passes through the reserved hole and the sliding sleeve, the armature freely slides along the hollow sleeve, and the hollow sleeve is provided with a mounting bolt connected with the traction machine.

7. The brake of claim 1 wherein, The outer magnetic pole core and the magnetic yoke are uniformly connected and fixed by a plurality of locking bolts, the side of the magnetic yoke facing the armature is provided with a stepped hole, the corresponding outer magnetic pole core is provided with a first pin hole, the stepped locking bolt passes through the first pin hole and the stepped hole and is threadedly connected with a locking nut, the locking bolt and the stepped hole are in contact through a stepped surface, the end surface of the head of the locking bolt is a plane, the head of the locking bolt protrudes from the outer magnetic pole core, and there is a gap δ between the end surface of the head of the locking bolt and the armature.

8. The brake of claim 7 wherein, The armature is provided with a sink groove corresponding to the head of the locking bolt, and the gap δ is left between the bottom surface of the sink groove and the end surface of the head of the locking bolt.

9. The brake of claim 1 wherein, The outer magnetic pole core and the inner magnetic pole core are respectively provided with a let-go through hole, a shock absorbing pad is arranged in the let-go through hole, the magnetic yoke is provided with a positioning screw hole corresponding to the let-go through hole, the tail of the fixing screw extends into the let-go through hole through the backup nut and the positioning screw hole, the tail of the fixing screw abuts against one end surface of the shock absorbing pad, and the other end surface of the shock absorbing pad extends out of the let-go through hole and abuts against the armature.

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