Double-sided electromagnetic braking driven wheel

Abstract

This utility model relates to the field of driven wheel braking technology, and provides a driven wheel with double-sided electromagnetic braking, including a hub body and a brake. The brake includes a stator, armature, rotor, and flange arranged in sequence. The stator is fixed to the vehicle's suspension, and the flange is connected to the stator. A hollow connecting shaft is formed by a central protrusion on one side of the hub body, and the rotor is slidably connected to the hollow connecting shaft and circumferentially fixed. This utility model uses double-sided friction for braking, resulting in greater frictional torque. Moreover, it eliminates the need to maintain a certain distance between the brake and the side of the hub body, converting the braking clearance into the clearance between the stator and the flange. This clearance can be adjusted before brake installation, making adjustment more convenient.

Description

Technical Field

[0001] This utility model relates to the field of driven wheel braking technology, and more specifically, to a driven wheel with double-sided electromagnetic braking. Background Technology

[0002] In fields such as industrial transmission, automated conveying, intelligent logistics, and engineering machinery, driven wheels are key components for power transmission and motion execution, and their braking performance directly determines the safety, stability, and control precision of equipment operation.

[0003] For forklifts, it is difficult to install caliper disc or drum brakes commonly used in vehicles on their driven wheel hubs. Existing technology uses spring-loaded braking as a substitute. For example, patent document CN220268271U discloses a braking method for forklift driven wheel hubs, which uses a compound spring to press the armature against the wheel hub for braking, ensuring the forklift's braking safety. However, this method has at least the following drawbacks: (1) The braking method is single-sided friction braking, with small friction torque; (2) During installation and adjustment, the distance between the armature and the side of the wheel hub needs to be strictly controlled to control the brake clearance. This distance is difficult to measure and adjustment is very inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a driven wheel with double-sided electromagnetic braking to solve the above-mentioned defects of the prior art.

[0005] This utility model is achieved through the following technical solution: A driven wheel with dual-sided electromagnetic braking includes a hub body and a brake. The brake includes a stator, an armature, a rotor, and a flange arranged in sequence. The stator is fixed to the vehicle's suspension, and the flange is connected to the stator. A hollow connecting shaft is formed by a central protrusion on one side of the hub body. The rotor is slidably connected to the hollow connecting shaft and is circumferentially fixed.

[0006] Optionally, the rotor is connected to the hollow connecting shaft via a spline.

[0007] Optionally, the stator and the flange are connected by connecting screws, and the connecting screws are fitted with positioning elements for limiting the distance between the flange and the stator. The armature is provided with guide holes that cooperate with the positioning elements.

[0008] Optionally, the positioning element is a hollow screw, the shank of which is connected to the stator, and the head of which abuts against the flange.

[0009] Optionally, the positioning element has a cylindrical structure, with one end abutting against the stator and the other end abutting against the flange.

[0010] Optionally, friction plates are bonded and fixed to both sides of the rotor.

[0011] Optionally, the rotor has mounting steps on both sides for mounting friction plates.

[0012] Optionally, the inner walls of the hollow connecting shaft are provided with positioning steps at both ends for bearing positioning.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, since the rotor and the hollow connecting shaft on the hub body are circumferentially fixed, braking can be achieved by clamping the rotor between the armature and the flange. On the one hand, this braking method is a double-sided friction, resulting in a larger frictional torque; on the other hand, it is not necessary to ensure the distance between the brake and the side of the hub body, converting the braking gap into the gap between the stator and the flange, which can be adjusted before the brake is installed, making adjustment more convenient. Attached Figure Description

[0014] Figure 1 A front view of a driven wheel with double-sided electromagnetic braking provided by this utility model; Figure 2 for Figure 1 AA section view; Figure 3 This is a cross-sectional view of the wheel hub body; Figure 4 for Figure 2 Enlarged view of point B in the image; Reference numerals in the attached drawings: 1-hub body, 101-hollow connecting shaft, 102-positioning step, 2-stator, 3-armature, 4-rotor, 5-flange, 6-friction plate, 7-suspension, 8-connecting screw, 9-mounting screw, 10-positioning component. Detailed Implementation

[0015] refer to Figures 1-3 A driven wheel with dual-sided electromagnetic braking includes a hub body 1 and a brake. The brake includes a stator 2, an armature 3, a rotor 4, and a flange 5 arranged in sequence. The stator 2 is fixed to the vehicle's suspension 7, and the flange 5 is connected to the stator 2. The center of the hub body 1 protrudes to one side to form a hollow connecting shaft 101. The rotor 4 is slidably connected to the hollow connecting shaft 101 and is circumferentially fixed, that is, the rotor 4 can slide along the axial direction of the hollow connecting shaft 101, but the rotor 4 and the hollow connecting shaft 101 cannot rotate relative to each other.

[0016] Those skilled in the art should understand that the stator 2 should include a magnetic yoke and a coil disposed inside the magnetic yoke. In the context of this embodiment, "stator 2" refers to the magnetic yoke unless otherwise specified. Furthermore, a blind hole is provided on the side of the magnetic yoke near the armature 3, and a pressure spring is installed inside the blind hole. When the coil is energized, the magnetic yoke attracts the armature 3, separating the armature 3 from the rotor 4, thus achieving braking contact. When the coil is de-energized, the pressure spring presses the armature 3 against the rotor 4, causing the rotor 4 to be held tightly by the armature 3 and the flange 5, thereby forming braking. On the one hand, this braking method involves double-sided friction, resulting in a greater frictional torque; on the other hand, it eliminates the need to maintain a certain distance between the brake and the side of the hub body 1, converting the braking gap into the gap between the stator 2 and the flange 5, which can be adjusted before brake installation, making adjustment more convenient.

[0017] The stator 2 and suspension 7 are fixed together by mounting screws 9, the heads of which are recessed into countersunk holes on the suspension 7. It is easy to understand that multiple mounting screws 9 should be installed circumferentially. In practical applications, the hub body 1 is mounted on the shaft via bearings, allowing it to rotate around the shaft. Furthermore, the inner walls of the hollow connecting shaft 101 are provided with positioning steps 102 at both ends for bearing positioning, making installation more convenient.

[0018] Friction plates 6 are bonded and fixed to both sides of the rotor 4. It is worth noting that since the friction coefficients of the rotor 4, armature 3, and flange 5 are fixed once their materials are determined, it is difficult to change the frictional force of the contact surface. The friction plates 6 are designed to adapt to different working conditions by selecting friction plates 6 with different friction coefficients. Furthermore, mounting steps for installing the friction plates 6 are provided on both sides of the rotor 4, facilitating the initial fixing of the friction plates 6 in position before bonding.

[0019] In this embodiment, the rotor 4 is slidably connected to the hollow connecting shaft 101 and circumferentially fixed as follows: the rotor 4 and the hollow connecting shaft 101 are connected by a spline, that is, the outer wall of the hollow connecting shaft 101 and the inner wall of the rotor 4 are provided with mutually mating key teeth. In other embodiments, other methods can also be selected to achieve the slidable connection and circumferential fixation between the rotor 4 and the hollow connecting shaft 101, such as a flat key connection; or the outer wall of the hollow connecting shaft 101 and the inner wall of the rotor 4 can be set into a mutually mating "D" shape.

[0020] refer to Figure 4 The stator 2 and flange 5 are connected as follows: the stator 2 and flange 5 are connected by connecting screws 8. A positioning element 10 is fitted onto the connecting screw 8 to limit the distance between the flange 5 and the stator 2. The armature 3 has a guide hole that mates with the positioning element 10. The positioning element 10 serves as a guide for the movement of the armature 3 and also achieves radial positioning of the armature 3. It is easy to understand that several connecting screws 8 are also provided circumferentially, and the positions of the connecting screws 8 and the mounting screws 9 are staggered.

[0021] Alternatively, in this embodiment, the positioning element 10 is a hollow screw. The shank of the hollow screw is connected to the stator 2, and the head of the hollow screw abuts against the flange 5. It should be understood that the hollow screw has a through hole inside, and the shank only has external threads at the end away from the head (connected to the stator 2), while the end closer to the head is a smooth shank (serving as a guide for the movement of the armature 3). It is worth noting that while the hollow screw limits the distance between the stator 2 and the flange 5, the distance between the stator 2 and the flange 5 can also be adjusted by changing the depth to which the hollow screw is screwed into the stator 2. In this way, after the friction plate 6 wears, the distance between the stator 2 and the flange 5 can be reduced, allowing the brake to continue to be used.

[0022] In other embodiments, the positioning element can of course be other structures, such as the positioning element 10 being a cylindrical structure, with one end abutting against the stator 2 and the other end abutting against the flange 5. It is worth noting that in this way, after the friction plate 6 wears out, the distance between the stator 2 and the flange 5 can be reduced by replacing the shorter positioning element 10, so that the brake can continue to be used.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A driven wheel with double-sided electromagnetic braking, comprising a hub body and a brake, characterized in that, The brake includes a stator, armature, rotor and flange arranged in sequence. The stator is fixed to the vehicle's suspension and the flange is connected to the stator. The center of the wheel hub body protrudes to one side to form a hollow connecting shaft. The rotor is slidably connected to the hollow connecting shaft and is circumferentially fixed.

2. The driven wheel of the double-sided electromagnetic braking according to claim 1, characterized in that, The rotor is connected to the hollow connecting shaft via a spline.

3. The driven wheel of the double-sided electromagnetic braking according to claim 1, characterized in that, The stator and the flange are connected by connecting screws. The connecting screws are fitted with positioning elements for limiting the distance between the flange and the stator. The armature is provided with guide holes that cooperate with the positioning elements.

4. The driven wheel of the double-sided electromagnetic braking according to claim 3, characterized in that, The positioning element is a hollow screw, the shank of which is connected to the stator, and the head of which abuts against the flange.

5. The driven wheel of the double-sided electromagnetic braking according to claim 3, characterized in that, The positioning element has a cylindrical structure, with one end abutting against the stator and the other end abutting against the flange.

6. The driven wheel of the double-sided electromagnetic braking according to any one of claims 1-5, characterized in that, Friction plates are bonded and fixed to both sides of the rotor.

7. The driven wheel of the double-sided electromagnetic braking according to claim 6, characterized in that, The rotor has mounting steps on both sides for mounting friction plates.

8. The driven wheel of the double-sided electromagnetic braking according to any one of claims 1-5, characterized in that, The hollow connecting shaft has positioning steps at both ends of its inner wall for bearing positioning.

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