Canine tooth structure suitable for electromagnetic clutch

Abstract

The utility model discloses a canine tooth structure suitable for electromagnetic clutch, including magnetic chuck and two connecting ring, wherein one connecting ring is fixedly connected with the magnetic chuck, one side of the magnetic chuck far away from the connecting ring is fixedly provided with a left canine tooth ring, one side of the other connecting ring is fixedly provided with a right canine tooth ring, and the right canine tooth ring is fixedly provided with a right canine tooth ring. The left canine tooth ring and the right canine tooth ring are each provided with a plurality of tooth grooves and tooth faces, the tooth grooves and the tooth faces are annularly arrayed with the axis of the connecting ring as the axis, and the tooth faces and the tooth grooves are arranged in a staggered mode. The meshing mode of the canine tooth structure is more stable than pure friction force transmission, in consideration of the situation that the left canine tooth ring and the right canine tooth ring are likely to be disengaged, the side walls of the tooth surfaces are all provided with inverted cone angles, when the left canine tooth ring and the right canine tooth ring rotate, axial friction force can be generated between tooth grooves and the tooth surfaces, and therefore the left canine tooth ring and the right canine tooth ring can be separated from each other. And the tooth surface and the tooth groove can be prevented from being separated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic clutches, in particular to a dog tooth structure suitable for electromagnetic clutches. Background Art

[0002] The electromagnetic clutch is a device that uses the principle of electromagnetic induction and the friction between the inner and outer friction plates to achieve transmission. When the coil is energized, an electromagnetic force is generated to compress the inner and outer friction plates, thereby transferring the torque (or power) of the active component to the driven component; when the coil is de-energized, the electromagnetic force disappears, the inner and outer friction plates separate, and the transmission stops.

[0003] The transmission method inside the traditional electromagnetic clutch is to transfer torque through friction through the fit of the armature. However, although the traditional armature transmission method is simple and effective, it also has some limitations. For example, the stability and durability of friction will be affected by environmental factors such as temperature and humidity. In addition, long-term friction will also cause material wear, which will affect the performance and service life of the clutch.

[0004] In order to avoid the defects caused by the above-mentioned armature connection, the armature can be replaced with a dog gear to transmit torque through the dog gear. However, replacing the armature inside the electromagnetic clutch with a dog gear may also cause defects. The two meshing dog gears may disengage due to insufficient axial friction. Specifically, the design of dog gears is usually used to transmit larger torques and achieve fast engagement and disengagement, but their tooth structure may not be as smooth as the armature, which will affect the contact area and stability between the dog gears. In the working environment of the electromagnetic clutch, if the axial friction between the dog gears is not sufficient to resist the transmitted torque and the dynamic load during operation, the dog gears may slide relative to each other, eventually leading to disengagement. Utility Model Content

[0005] The purpose of the utility model is to provide a dog tooth structure suitable for an electromagnetic clutch to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a canine tooth structure suitable for an electromagnetic clutch, comprising a magnetic suction cup and two connecting rings, one of the connecting rings is fixedly connected to the magnetic suction cup, a left canine tooth ring is fixedly installed on the side of the magnetic suction cup away from the connecting ring, and a right canine tooth ring is fixedly installed on one side of the other connecting ring, a plurality of tooth grooves and tooth surfaces are arranged on the left and right canine tooth rings, the plurality of tooth grooves and tooth surfaces are arranged in an annular array with the axial center line of the connecting ring as the axis, and the tooth surfaces and tooth grooves are staggered with each other, and the side walls of the plurality of tooth surfaces are provided with inverted cone angles.

[0007] As a further description of the above technical solution: the angle of the inverted cone is 2°.

[0008] As a further description of the above technical solution: the angle between the two ends of the tooth groove and the line connecting the axis point of the connecting ring is 8°, and the angle between the two ends of the tooth surface and the line connecting the axis point of the connecting ring is 7°.

[0009] As a further description of the above technical solution: a plurality of reinforcement plates are fixedly connected between the connecting ring arranged on the side wall of the right dog tooth ring and the right dog tooth ring.

[0010] As a further description of the above technical solution: the side walls of the two connecting rings are each provided with a plurality of heat dissipation holes.

[0011] As a further description of the above technical solution: a connecting shaft is sleeved inside each of the two connecting rings, and a spline is provided on the side wall of the connecting ring.

[0012] As a further description of the above technical solution: the side walls of the left dog tooth ring and the right dog tooth ring are both provided with a heat dissipation coating.

[0013] As a further description of the above technical solution: the inner wall of the spline is provided with a wear-resistant coating.

[0014] As a further description of the above technical solution: the materials of the left dog ring and the right dog ring are both set to medium carbon steel after surface nitriding treatment.

[0015] The utility model provides a canine tooth structure suitable for an electromagnetic clutch. It has the following beneficial effects: the magnetic suction cup on one side of the left canine tooth ring can be attracted by the electromagnetic coil, and the meshing between the left canine tooth ring and the right canine tooth ring can be achieved by controlling the on and off of the electromagnetic coil. The two connecting rings are installed on the transmission shaft, and the torque is transmitted between the two transmission shafts through the meshing of the left canine tooth ring and the right canine tooth ring. The meshing method of the canine tooth structure is more stable than the simple friction force transmission. Considering that the left canine tooth ring and the right canine tooth ring may also be disengaged, the side walls of the tooth surface are all provided with an inverted cone angle. When the left canine tooth ring and the right canine tooth ring rotate, axial friction will be generated between the tooth groove and the tooth surface, which can prevent the tooth surface and the tooth groove from being disengaged.

[0016] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0017] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the overall three-dimensional structure of a canine tooth structure suitable for an electromagnetic clutch proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model installed on the transmission shaft;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model when the tooth groove and the tooth surface are meshing;

[0022] Figure 5 It is a schematic diagram of the top view of the left canine ring of the utility model;

[0023] Figure 6 It is a schematic cross-sectional structure diagram of a spline of the utility model provided with a wear-resistant coating;

[0024] Figure 7 It is a schematic cross-sectional structure diagram of a heat dissipation coating provided on the left canine ring of the utility model.

[0025] Legend:

[0026] 1. Magnetic chuck; 2. Connecting ring; 3. Left canine ring; 4. Right canine ring; 5. Spline; 6. Reinforcement sheet; 7. Heat dissipation hole; 8. Heat dissipation coating; 9. Tooth groove; 10. Tooth surface; 11. Inverted cone angle; 12. Wear-resistant coating; 13. Transmission shaft. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Reference Figure 1-7A canine tooth structure suitable for an electromagnetic clutch comprises a magnetic chuck 1 and two connecting rings 2, wherein one of the connecting rings 2 is fixedly connected to the magnetic chuck 1, a left canine tooth ring 3 is fixedly installed on the side of the magnetic chuck 1 away from the connecting ring 2, and a right canine tooth ring 4 is fixedly installed on one side of the other connecting ring 2, and a plurality of tooth grooves 9 and tooth surfaces 10 are arranged on the left and right canine tooth rings 3 and 4, and the plurality of tooth grooves 9 and tooth surfaces 10 are arranged in an annular array with the axis of the connecting ring 2 as the axis, and the tooth surfaces 10 and tooth grooves 9 are arranged in an interlaced manner, and the side walls of the plurality of tooth surfaces 10 are provided with an inverted cone angle 11; the magnetic chuck 1 on one side of the left canine tooth ring 3 can be The electromagnetic coil is attracted, and the meshing between the left dog ring 3 and the right dog ring 4 can be achieved by controlling the on and off of the electromagnetic coil. The two connecting rings 2 are installed on the transmission shaft 13, and the torque is transmitted between the two transmission shafts 13 through the meshing of the left dog ring 3 and the right dog ring 4. The meshing method of the canine structure is more stable than the simple friction force transmission. Considering that the left dog ring 3 and the right dog ring 4 may also be disengaged, the side walls of the tooth surface 10 are provided with an inverted cone angle 11. When the left dog ring 3 and the right dog ring 4 rotate, axial friction will be generated between the tooth groove 9 and the tooth surface 10, which can prevent the tooth surface 10 and the tooth groove 9 from being disengaged.

[0029] As a preferred technical solution of this embodiment, the angle of the inverted cone angle 11 is 2°.

[0030] As the preferred technical solution of this embodiment, the angle between the two ends of the tooth groove 9 and the line connecting the axial points of the connecting ring 2 is 8°, and the angle between the two ends of the tooth surface 10 and the line connecting the axial points of the connecting ring 2 is 7°; the width of the tooth groove 9 is larger than the width of the tooth surface 10. When meshing, the tooth groove 9 and the tooth surface 10 are not tightly fitted, and there is a disengagement angle of 1° between the tooth surface 10 and the tooth groove 9. When the left canine ring 3 and the right canine ring 4 need to be separated, the torque is removed and the reverse axial force is applied, and the two canine teeth can be disengaged.

[0031] As a preferred technical solution of this embodiment, a plurality of reinforcement plates 6 are fixedly connected between the connecting ring 2 arranged on the side wall of the right dog ring 4 and the right dog ring 4; the arrangement of the reinforcement plates 6 can increase the structural rigidity between the right dog ring 4 and the connecting ring 2, thereby making the torque transmission between the connecting ring 2 and the right dog ring 4 more stable.

[0032] As the preferred technical solution of this embodiment, the side walls of the two connecting rings 2 are provided with a plurality of heat dissipation holes 7; the heat dissipation holes 7 penetrate the side walls on both sides of the connecting ring 2. During operation, the heat dissipation holes 7 can effectively ventilate and dissipate heat for the connecting ring 2, the left canine ring 3 and the right canine ring 4, preventing the operating temperature from being too high, and avoiding the influence of high temperature on the operation of the electromagnetic clutch.

[0033] As a preferred technical solution of this embodiment, a connecting shaft is sleeved inside the two connecting rings 2, and a spline 5 is opened on the side wall of the connecting ring 2; the provision of the spline 5 can increase the friction between the connecting shaft and the connecting ring 2.

[0034] As a preferred technical solution of this embodiment, the side walls of the left dog tooth ring 3 and the right dog tooth ring 4 are both provided with a heat dissipation coating 8; the provision of the heat dissipation coating 8 can further enhance the heat dissipation performance.

[0035] As a preferred technical solution of this embodiment, the inner wall of the spline 5 is provided with a wear-resistant coating 12 ; the provision of the wear-resistant coating 12 can increase the wear resistance of the spline 5 and increase the service life of the connecting ring 2 .

[0036] As the preferred technical solution of this embodiment, the materials of the left dog ring 3 and the right dog ring 4 are both set to medium carbon steel after surface nitriding treatment; medium carbon steel not only has excellent strength and hardness, but also can significantly improve its surface wear resistance and corrosion resistance after nitriding treatment. After fine nitriding treatment, a hard nitrided layer is formed on the surface of the left dog ring 3 and the right dog ring 4, which can not only effectively resist the erosion of the external environment, but also maintain good performance during long-term use, thereby increasing the service life of the device.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dog tooth structure suitable for an electromagnetic clutch, comprising a magnetic chuck (1) and two connecting rings (2), wherein one of the connecting rings (2) is fixedly connected to the magnetic chuck (1), characterized in that: A left dog tooth ring (3) is fixedly mounted on one side of the magnetic suction cup (1) away from the connecting ring (2), and a right dog tooth ring (4) is fixedly mounted on one side of the other connecting ring (2). The left dog tooth ring (3) and the right dog tooth ring (4) are both provided with a plurality of tooth grooves (9) and tooth surfaces (10). The plurality of tooth grooves (9) and tooth surfaces (10) are arranged in an annular array with the axis of the connecting ring (2) as the axis, and the tooth surfaces (10) and tooth grooves (9) are arranged in an interlaced manner, and the side walls of the plurality of tooth surfaces (10) are all provided with inverted cone angles (11).

2. A dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: The inverted cone angle (11) is 2°.

3. A dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: The angle between the two ends of the tooth groove (9) and the line connecting the axis center point of the connecting ring (2) is 8°, and the angle between the two ends of the tooth surface (10) and the line connecting the axis center point of the connecting ring (2) is 7°.

4. The dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: A plurality of reinforcing plates (6) are fixedly connected between the connecting ring (2) arranged on the side wall of the right dog tooth ring (4) and the right dog tooth ring (4).

5. The dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: The side walls of the two connecting rings (2) are each provided with a plurality of heat dissipation holes (7).

6. The dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: A connecting shaft is sleeved inside each of the two connecting rings (2), and a spline (5) is provided on the side wall of the connecting ring (2).

7. The dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: The side walls of the left dog tooth ring (3) and the right dog tooth ring (4) are both provided with a heat dissipation coating (8).

8. The dog tooth structure suitable for an electromagnetic clutch according to claim 6, characterized in that: The inner wall of the spline (5) is provided with a wear-resistant coating (12).

9. The dog tooth structure suitable for an electromagnetic clutch according to claim 1, characterized in that: The material of the left dog tooth ring (3) and the right dog tooth ring (4) is both medium carbon steel after surface nitriding treatment.

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