Electromagnetic damper with self-locking function

Abstract

The utility model discloses an electromagnetic damper with a self-locking function, and belongs to the technical field of electromagnetic dampers. Comprising an electromagnetic damper body, a rotating shaft of the electromagnetic damper body is connected with an external connection shaft, the external connection shaft is provided with a telescopic rod sliding in the radial direction of the external connection shaft, the external connection shaft is sleeved with a locking ring, a notch is formed in the circular shaft face of the inner side of the locking ring in a concave mode, and the telescopic rod and the notch are located on the same plane. When the electromagnetic damper accidentally stops power supply and resistance disappears, self-locking can be achieved, the movable handle does not need to be pressed downwards, response is more timely, and the injury risk of trainees is reduced.

Description

Technical Field

[0001] This application belongs to the field of electromagnetic damper technology, specifically relating to an electromagnetic damper with a self-locking function. Background Technology

[0002] An electromagnetic damper is a device that uses the principle of electromagnetic induction to generate damping force, mainly used for vibration reduction and buffering. Its basic working principle is based on Faraday's law of electromagnetic induction: when a conductor moves in a magnetic field, an induced electromotive force is generated within the conductor, which in turn forms a current. The magnetic field generated by this current interacts with the original magnetic field, producing a force opposite to the direction of the conductor's motion, i.e., the damping force.

[0003] Electromagnetic dampers can be used in training equipment to adjust training intensity. In a stationary bike, the resistance can be adjusted by changing the current, making the resistance adjustment more linear. However, if the electromagnetic damper malfunctions and the current supply is lost, the resistance essentially disappears, easily causing the bike to run away and increasing the risk of leg strains for the rider. Currently, training bikes use a handlebar for emergency braking, which increases the difficulty of braking and fails to prevent injury to the rider in the event of a runaway bike. Utility Model Content

[0004] The technical problem to be solved by this application is to overcome the shortcomings of the prior art and provide an electromagnetic damper with a self-locking function. This application can self-lock when the electromagnetic damper is unexpectedly cut off from power and the resistance disappears, without the need to press down the brake handle, so as to respond more promptly and reduce the risk of injury to trainees.

[0005] The technical solution adopted by this application to solve its existing problems is:

[0006] An electromagnetic damper with a self-locking function includes an electromagnetic damper body, an external shaft connected to the rotating shaft of the electromagnetic damper body, a telescopic rod that slides radially on the external shaft, a locking ring sleeved on the outside of the external shaft, a groove recessed on the inner circular surface of the locking ring, and the telescopic rod and the groove being located on the same plane.

[0007] Preferably, a rotating ring is coaxially fixed on the external shaft, and a first spring cavity is recessed on the circumferential surface of the rotating ring. The telescopic rod is slidably disposed inside the first spring cavity, and a first spring is sleeved on the telescopic rod located inside the first spring cavity.

[0008] Preferably, the telescopic rod has a locking block at its front end, which protrudes to the outer side of the telescopic rod's circumference.

[0009] The slot is connected to a groove on the side of the slot opposite to the external shaft, and the size of the groove is larger than the size of the slot.

[0010] Preferably, a sleeve is fitted around the locking ring, the sleeve is fixedly connected to the electromagnetic damper body, a second spring cavity is recessed on the top surface of the locking ring, a push rod is slidably provided in the second spring cavity, and a second spring is provided between the push rod and the bottom surface of the second spring cavity.

[0011] The top surface of the socket is provided with a through-hole, which is located on the line on which the top rod rotates around the external shaft.

[0012] Preferably, a pressure bar is provided at the top of the card hole.

[0013] Preferably, a third spring is fitted on the pressure rod located outside the card hole, and a pressure plate is provided above the pressure rod.

[0014] Preferably, the pressure plate and the external shaft are arranged coaxially.

[0015] Preferably, a resistance ring is provided between the locking ring and the sleeve.

[0016] Preferably, the resistance ring is fixedly connected to the inner wall of the socket, the damping ring is rotatably connected to the locking ring, and the damping ring abuts against the locking ring.

[0017] Preferably, the rotating shaft end of the electromagnetic damper body is provided with a first flange, and the end of the external shaft is provided with a second flange, and the first flange and the second flange are connected by bolts.

[0018] Compared with the prior art, the beneficial effects of this application are as follows:

[0019] (1) When the electromagnetic damper loses resistance and causes the vehicle to run away, the telescopic rod can lock the external shaft under the action of centrifugal force, eliminating safety hazards and improving the safety of use.

[0020] (2) The locking ring and damping ring slow down and lock the assembly under the action of overcoming friction force, which reduces the torsional stress on the external shaft during self-locking and also avoids injury to the trainees. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a structural diagram of an electromagnetic damper with a self-locking function according to this application.

[0023] Figure 2 This is an exploded view of an electromagnetic damper with a self-locking function according to this application.

[0024] Figure 3 This is a cross-sectional view of an electromagnetic damper with a self-locking function according to this application.

[0025] Figure 4This is a structural diagram of the external shaft in an electromagnetic damper with a self-locking function according to this application.

[0026] Figure 5 This is a structural diagram of the locking ring in an electromagnetic damper with a self-locking function according to this application.

[0027] Figure 6 This is a first cross-sectional view of an electromagnetic damper with a self-locking function according to this application, after removing the electromagnetic damper body.

[0028] Figure 7 This is a second cross-sectional view of an electromagnetic damper with a self-locking function according to this application, after removing the electromagnetic damper body.

[0029] In the diagram: 1-Electromagnetic damper body, 101-First flange, 2-External shaft, 201-Second flange, 202-Rotating ring, 203-First spring cavity, 3-Telescopic rod, 301-Clamping block, 4-First spring, 5-Socket, 501-Clamping hole, 6-Locking ring, 601-Slot, 602-Clamping groove, 603-Second spring cavity, 7-Second spring, 8-Push rod, 9-Resistance ring, 10-Pressure rod, 11-Pressure plate, 12-Third spring. Detailed Implementation

[0030] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0031] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] The attached figure shows a preferred embodiment of an electromagnetic damper with a self-locking function. The following is a more detailed description of this application in conjunction with the attached figure.

[0034] Depend on Figures 1 to 7 As shown, an electromagnetic damper with a self-locking function includes an electromagnetic damper body 1. The electromagnetic damper body 1 adopts the prior art, with a rotating conductor in the middle and electromagnets arranged in a ring array around its axis. The rotating shaft of the rotating conductor passes through the outside of the housing of the electromagnetic damper body 1.

[0035] An external shaft 2 is connected to the rotating shaft of the electromagnetic damper body 1. The two are detachably connected. Specifically, the rotating shaft of the electromagnetic damper body 1 is provided with a first flange 101, and the external shaft 2 is provided with a second flange 201. The first flange 101 and the second flange 201 are connected by bolts.

[0036] The outer shaft 2 is provided with a telescopic rod 3 that slides radially thereon. A locking ring 6 is sleeved on the outside of the outer shaft 2. A groove 601 is recessed on the inner circular surface of the locking ring 6. The telescopic rod 3 and the groove 601 are located on the same plane.

[0037] The rotation of the external shaft 2 generates centrifugal force, which swings the telescopic rod 3 outward. After the telescopic rod 3 is inserted into the slot 601, the locking ring 6 locks the external shaft 2, causing it to stop rotating.

[0038] In order to prevent the telescopic rod 3 from moving out of the external shaft 2 at normal speed, in this embodiment, a rotating ring 202 is coaxially fixed on the external shaft 2. A first spring cavity 203 is recessed on the circumferential surface of the rotating ring 202. The telescopic rod 3 is slidably disposed inside the first spring cavity 203. A first spring 4 is sleeved on the telescopic rod 3 located inside the first spring cavity 203.

[0039] A spring seat is provided on the side of the telescopic rod 3 facing the axis of the external shaft 2. The two ends of the first spring 4 abut against the spring seat and the end face of the outlet of the first spring cavity 203, respectively. The first spring 4 pushes the telescopic rod 3 towards the axis of the external shaft 2. The telescopic rod 3 will only slide outward when the centrifugal force overcomes the thrust of the first spring 4. Therefore, the rotational speed of the external shaft 2 when locked can be determined by the selection of the first spring 4.

[0040] In order to prevent the telescopic rod 3 from automatically resetting after the locking ring 6 locks the external shaft 2 when the external shaft 2 stops rotating, the centrifugal force decreases or disappears, during the flight, the front end of the telescopic rod 3 is provided with a locking block 301, which protrudes to the outer side of the circumference of the telescopic rod 3.

[0041] The slot 601 is connected to a slot 602 on the side opposite to the external shaft 2. The size of the slot 602 is larger than that of the slot 601.

[0042] The telescopic rod 3 is equipped with locking blocks 301 symmetrically arranged around its axis. The locking blocks 301 are engaged within the locking slots 602, so even if the external shaft 2 stops rotating, the first spring 4 cannot pull the telescopic rod 3 back. The locking blocks 301 can only be removed from the locking slots 602 by manually rotating the external shaft 2. This facilitates resetting the telescopic rod 3 and unlocking the external shaft 2 after troubleshooting.

[0043] The external shaft 2 is directly jammed, which not only increases the torsional stress on the external shaft 2, making it prone to breakage, but also affects the safety of the trainees. Therefore, in this embodiment, a sleeve 5 is coaxially sleeved on the outside of the locking ring 6, and the sleeve 5 is fixedly connected to the electromagnetic damper body 1. A second spring cavity 603 is recessed on the top surface of the locking ring 6, and a push rod 8 is slidably mounted on the second spring cavity 603. A second spring 7 is provided between the push rod 8 and the bottom surface of the second spring cavity 603, and the second spring 7 pushes the push rod 8 to move outward from the second spring cavity 603.

[0044] The top surface of the socket 5 has a through-hole 501, which is located on the line on which the push rod 8 rotates around the external shaft 2. The 501 and the push rod 8 are arranged alternately. Only when the machine is in motion does the telescopic rod 3 insert into the locking ring 6, the connecting shaft 2 drives the locking ring 6 to rotate, the push rod 8 rotates to directly below the 501, and then, under the push of the second spring 7, it partially moves into the 501, locking the locking ring 6.

[0045] A resistance ring 9 is provided between the locking ring 6 and the socket 5. The resistance ring 9 is fixedly connected to the inner wall of the socket 5, and the damping ring 9 is rotatably connected to the locking ring 6, with the damping ring 9 abutting against the locking ring 6. The damping ring 9 is made of rubber, and the contact surface between the locking ring 6 and the damping ring 9 is also made of rubber. The friction force reduces speed and eliminates the torsional stress of the external shaft 2.

[0046] The top of the locking hole 501 is provided with a pressure rod 10, and a third spring 12 is sleeved on the pressure rod 10 located outside the locking hole 501. A pressure plate 11 is provided above the pressure rod 10. The pressure plate 11 is coaxially arranged with the external shaft 2. Overcoming the thrust of the third spring 12, the pressure plate 11 is pressed down, which in turn drives the pressure rod 10 to push out the top rod 8 inside the locking hole 501, thereby unlocking the locking ring 6.

[0047] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An electromagnetic damper with a self-locking function, comprising an electromagnetic damper body (1), characterized in that: An external shaft (2) is connected to the rotating shaft of the electromagnetic damper body (1). A telescopic rod (3) that slides radially on the external shaft (2) is provided. A locking ring (6) is sleeved on the outside of the external shaft (2). A groove (601) is recessed on the inner circular surface of the locking ring (6). The telescopic rod (3) and the groove (601) are located on the same plane.

2. An electromagnetic damper with a self-locking function according to claim 1, characterized in that: A rotating ring (202) is coaxially fixed on the external shaft (2). A first spring cavity (203) is recessed on the circumferential surface of the rotating ring (202). The telescopic rod (3) is slidably disposed inside the first spring cavity (203). A first spring (4) is sleeved on the telescopic rod (3) located inside the first spring cavity (203).

3. An electromagnetic damper with a self-locking function according to claim 1 or 2, characterized in that: The telescopic rod (3) is provided with a locking block (301) at its front end, and the locking block (301) protrudes to the outer side of the circumferential surface of the telescopic rod (3); The slot (601) is connected to a slot (602) on the side opposite to the external shaft (2), and the size of the slot (602) is larger than the size of the slot (601).

4. An electromagnetic damper with a self-locking function according to claim 3, characterized in that: The locking ring (6) is fitted with a sleeve (5), which is fixedly connected to the electromagnetic damper body (1). The top surface of the locking ring (6) is recessed with a second spring cavity (603). The second spring cavity (603) is slidably provided with a push rod (8). A second spring (7) is provided between the push rod (8) and the bottom surface of the second spring cavity (603). The top surface of the socket (5) is provided with a through hole (501), which is located on the line on which the top rod (8) rotates around the outer shaft (2).

5. An electromagnetic damper with a self-locking function according to claim 4, characterized in that: The top of the card hole (501) is provided with a pressure rod (10).

6. An electromagnetic damper with a self-locking function according to claim 5, characterized in that: A third spring (12) is fitted on the pressure rod (10) located outside the card hole (501), and a pressure plate (11) is provided above the pressure rod (10).

7. An electromagnetic damper with a self-locking function according to claim 6, characterized in that: The pressure plate (11) is arranged coaxially with the external shaft (2).

8. An electromagnetic damper with a self-locking function according to any one of claims 4 to 7, characterized in that: A resistance ring (9) is provided between the locking ring (6) and the sleeve (5).

9. An electromagnetic damper with a self-locking function according to claim 8, characterized in that: The resistance ring (9) is fixedly connected to the inner wall of the socket (5), the resistance ring (9) is rotatably connected to the locking ring (6), and the resistance ring (9) abuts against the locking ring (6).

10. An electromagnetic damper with a self-locking function according to claim 1, 2, 4, 5, 6, 7, or 9, characterized in that: The electromagnetic damper body (1) has a first flange (101) at the end of its rotating shaft, and the external shaft (2) has a second flange (201) at the end. The first flange (101) and the second flange (201) are connected by bolts.

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