Current collecting electromagnet

Abstract

The utility model relates to a current collection electromagnet in the technical field of electromagnet, shell, static magnetic core and dynamic magnetic core, static magnetic core is hollow structure setting in the inside of shell, dynamic magnetic core is movably arranged in the center of static magnetic core, its characterized in that: one end surface of the shell is equipped with movable guide rod, and one end of guide rod extends to the inside of static magnetic core and carries out fixed connection with one end of dynamic magnetic core, and dynamic magnetic core can move along the axial direction of guide rod, and the end away from dynamic magnetic core of guide rod is the extension to the outside of shell for adjusting part, and the surface of adjusting part is equipped with limit sleeve, and limit sleeve is hollow structure, and limit sleeve and adjusting part between movable connection, and the end close to dynamic magnetic core of limit sleeve can be in contact with the end surface of shell, and the different limiting height between limit sleeve and shell forms, thereby control dynamic magnetic core and push rod telescopic stroke range size of drive component, realized the adjustable function of current collection electromagnet drive stroke.

Description

Technical Field

[0001] This utility model relates to the field of electromagnet technology, and in particular to a current-collecting electromagnet. Background Technology

[0002] A current collector, also known as a current collector shoe, is a dynamic current collection device installed on the train bogie to dynamically draw current from the rigid power supply rail (third rail) to meet the train's power needs. The current collector is the power receiving device that connects the train to the contact rail, and it is usually located below the train. The current-collecting electromagnet is the driving electromagnet in the current collector. When energized, the current-collecting electromagnet generates a magnetic attraction force, driving the moving magnetic core to move a certain distance towards the stationary magnetic core, thereby actuating the entire current collector.

[0003] According to Chinese utility model patent CN209625958U, a current-collecting electromagnet includes a support rod, a concave basin-shaped static magnetic core, and a convex moving magnetic core matching the static magnetic core. An outer magnet surrounds the static magnetic core, and a coil is housed within the outer magnet. A junction box is located above the outer magnet. The moving magnetic core is fixedly connected to the support rod. An end cap is located outside the moving magnetic core and is fixedly connected to the outer magnet. A spring box is located on one side of the end cap, containing a spring connected to one end of the support rod. A rod head is located at the other end of the support rod, and a telescopic tube connects the rod head to the outer magnet. This utility model can improve the environmental adaptability of the current collector, expand the voltage operating range, and increase the driving force under rated voltage while maintaining the same mass, electrical power, and stroke.

[0004] However, existing current-collecting electromagnets can only determine the extension and retraction range of the moving magnetic core and push rod and other driving components based on the radial space of the stationary magnetic core, and cannot adjust the extension and retraction range of the driving components. Therefore, in view of these current conditions, there is an urgent need to develop a current-collecting electromagnet to meet the needs of practical use. Utility Model Content

[0005] The purpose of this invention is to provide a current-collecting electromagnet to solve the above-mentioned defects.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A current-collecting electromagnet includes a housing, a stationary magnetic core, and a moving magnetic core. The stationary magnetic core is hollow and disposed inside the housing. The moving magnetic core is movably disposed at the center of the stationary magnetic core. A movable guide rod is provided on one end face of the housing. One end of the guide rod extends into the interior of the stationary magnetic core and is fixedly connected to one end of the moving magnetic core. The moving magnetic core can move along the axial direction of the guide rod. The end of the guide rod away from the moving magnetic core is an adjustment part that extends to the outside of the housing. A limiting sleeve is provided on the surface of the adjustment part. The limiting sleeve is hollow and is movably connected to the adjustment part. The end of the limiting sleeve near the moving magnetic core can abut against the end face of the housing.

[0008] As a further embodiment of the above description, the inner wall of the limiting sleeve has an internal thread structure, and the surface of the adjusting part is provided with an internal thread that matches the limiting sleeve. The limiting sleeve and the adjusting part are threadedly connected, and rotating the limiting sleeve can adjust the gap between the limiting sleeve and the end face of the housing.

[0009] As a further embodiment of the above description, the moving magnetic core is a permanent magnet, and the end of the moving magnetic core away from the guide rod can extend to the outer side of the bottom end face of the housing.

[0010] As a further embodiment of the above description, an elastic element is provided between the end of the moving magnetic core away from the guide rod and the housing. The elastic element is composed of a spring, which is sleeved on the end of the moving magnetic core, and the two ends of the spring are fixedly connected to the end face of the housing and the end of the moving magnetic core, respectively.

[0011] As a further embodiment of the above description, a self-lubricating bearing is provided at the junction of the guide rod and the housing, and the middle part of the guide rod is inserted into the self-lubricating bearing.

[0012] As a further embodiment of the above description, the static magnetic core is composed of an enameled coil, and the outer side of the housing is provided with several connecting tabs, which are electrically connected to the enameled coil.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the adjustment part at the end of the guide rod is set on the outside of the housing, and the limiting sleeve is movably set on the surface of the adjustment part. The height position of the limiting sleeve is adjusted so that the contact position between the limiting sleeve and the housing can be adjusted. By forming different limiting heights between the limiting sleeve and the housing, the extension and retraction range of the driving components such as the moving magnetic core and the push rod can be controlled, thereby realizing the adjustable function of the driving stroke of the current-collecting electromagnet. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a current-collecting electromagnet described in this embodiment;

[0015] Figure 2 This is a cross-sectional view of a current-collecting electromagnet as described in this embodiment;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the structure of part A in the diagram;

[0017] In the diagram: 1-shell, 2-moving magnetic core, 3-stationary magnetic core, 4-self-lubricating bearing, 5-guide rod, 51-adjustment part, 6-limiting sleeve, 7-elastic element, 8-connecting tab. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] For this embodiment, please refer to Figures 1-3 The specific implementation of the current-collecting electromagnet includes a housing 1, a stationary magnetic core 3, and a moving magnetic core 2. The stationary magnetic core 3 is a hollow structure disposed inside the housing 1. The moving magnetic core 2 is movably disposed at the center of the stationary magnetic core 3. One end face of the housing 1 is provided with a movable guide rod 5. One end of the guide rod 5 extends into the interior of the stationary magnetic core 3 and is fixedly connected to one end of the moving magnetic core 2. The moving magnetic core 2 can move along the axial direction of the guide rod 5. The end of the guide rod 5 away from the moving magnetic core 2 is an adjustment part 51 extending to the outside of the housing 1. The surface of the adjustment part 51 is provided with a limiting sleeve 6. The limiting sleeve 6 is a hollow structure and is movably connected to the adjustment part 51. The end of the limiting sleeve 6 near the moving magnetic core 2 can abut against the end face of the housing 1.

[0020] The adjusting part 51 at the tail end of the guide rod 5 is set on the outside of the housing 1, and the limiting sleeve 6 is movably set on the surface of the adjusting part 51. The height position of the limiting sleeve 6 is adjusted so that the contact position between the limiting sleeve 6 and the housing 1 can be adjusted. By forming different limiting heights between the limiting sleeve 6 and the housing 1, the extension and retraction range of the driving components such as the moving magnetic core 2 and the push rod can be controlled, thereby realizing the adjustable function of the driving stroke of the current electromagnet.

[0021] Specifically, such as Figure 3 As shown, the inner wall of the limiting sleeve 6 has an internal thread structure, and the surface of the adjusting part 51 is provided with an internal thread that matches the limiting sleeve. The limiting sleeve 6 and the adjusting part 51 are threadedly connected. Rotating the limiting sleeve 6 can adjust the gap between the limiting sleeve 6 and the end face of the housing 1.

[0022] Specifically, such as Figure 2 As shown, the moving magnetic core 2 is a permanent magnet. The end of the moving magnetic core 2 away from the guide rod 5 can extend to the outer side of the bottom end face of the housing 1. An elastic element 7 is provided between the end of the moving magnetic core 2 away from the guide rod 5 and the housing 1. The elastic element 7 is composed of a spring. The spring is sleeved on the end of the moving magnetic core 2, and the two ends of the spring are fixedly connected to the end face of the housing 1 and the end of the moving magnetic core 2, respectively.

[0023] A self-lubricating bearing 4 is provided at the junction of the guide rod 5 and the housing 1. The middle part of the guide rod 5 is inserted into the self-lubricating bearing 4. The static magnetic core 3 is composed of an enameled coil. Several connecting tabs 8 are provided on the outer side of the housing 1. The connecting tabs 8 are electrically connected to the enameled coil.

[0024] The working process of a current-collecting electromagnet is as follows: By rotating the limiting sleeve 6, the limiting sleeve 6 is threaded along the radial direction of the adjusting part 51, so that the height between the limiting sleeve 6 and the end face of the housing 1 is adjusted to the required position. The connecting tab 8 is connected to the external power supply, the enameled coil in the stationary magnetic core 3 is energized to generate a driving magnetic field, and the moving magnetic core 2 can move along the axial direction of the guide rod 5. The bottom end of the moving magnetic core 2 can extend to the outside of the bottom end face of the housing 1 to complete the driving action. At the same time, the limiting sleeve 6 and the end face of the housing 1 form a height limiting structure. When the connecting tab 8 is disconnected from the external power supply, the elastic element 7 of the spring process can reset the moving magnetic core 2 into the stationary magnetic core 3.

[0025] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A current-collecting electromagnet, comprising a housing, a stationary magnetic core, and a moving magnetic core, wherein the stationary magnetic core is a hollow structure disposed inside the housing, and the moving magnetic core is movably disposed at the center of the stationary magnetic core, characterized in that: One end face of the housing is provided with a movable guide rod. One end of the guide rod extends into the interior of the stationary magnetic core and is fixedly connected to one end of the moving magnetic core. The moving magnetic core can move along the axial direction of the guide rod. The end of the guide rod away from the moving magnetic core is an adjustment part that extends to the outside of the housing. The surface of the adjustment part is provided with a limiting sleeve. The limiting sleeve has a hollow structure and is movably connected to the adjustment part. The end of the limiting sleeve near the moving magnetic core can abut against the end face of the housing.

2. The current-collecting electromagnet according to claim 1, characterized in that: The inner wall of the limiting sleeve has an internal thread structure, and the surface of the adjusting part is provided with an internal thread that matches the limiting sleeve. The limiting sleeve and the adjusting part are threadedly connected. Rotating the limiting sleeve can adjust the gap between the limiting sleeve and the end face of the housing.

3. The current-collecting electromagnet according to claim 1, characterized in that: The moving magnetic core is a permanent magnet, and the end of the moving magnetic core away from the guide rod can extend to the outer side of the bottom end face of the housing.

4. The current-collecting electromagnet according to claim 3, characterized in that: An elastic element is provided between the end of the moving magnetic core away from the guide rod and the housing. The elastic element is made of a spring, which is sleeved on the end of the moving magnetic core. The two ends of the spring are fixedly connected to the end face of the housing and the end of the moving magnetic core, respectively.

5. A current-collecting electromagnet according to claim 1, characterized in that: A self-lubricating bearing is provided at the junction of the guide rod and the housing, and the middle part of the guide rod is inserted into the self-lubricating bearing.

6. A current-collecting electromagnet according to claim 1, characterized in that: The static magnetic core is composed of an enameled coil, and the outer side of the housing is provided with several connecting tabs, which are electrically connected to the enameled coil.

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