Proximity sensor for motorized spindle

Abstract

The utility model provides a proximity sensor for a motorized spindle, which relates to the field of proximity sensors for motorized spindles, and comprises a shell assembly, the shell assembly comprises a metal shell and a hollow groove, a cable assembly is arranged in the shell assembly, the cable assembly comprises a special cable and a circuit board, and the special cable is arranged in the hollow groove. An induction shell is arranged at one end of the shell assembly, a magnetic core mechanism is arranged on one side of the induction shell, the magnetic core mechanism comprises a tank-shaped single-opening ferrite magnetic core, a groove, a central column and a single-edge groove, and a single-strand frameless coil is arranged in the magnetic core mechanism. According to the utility model, the tank-type single-opening ferrite magnetic core is only provided with the single-side groove, so that interference signals can be shielded in actual working conditions, the sensor is ensured not to operate mistakenly, and the inner wall of the single-strand frameless coil is not supported by a framework, so that the sensor can be applied to a very small space technologically; and meanwhile, the performance parameters of the single-strand frameless coil can be more stable.

Description

Technical Field

[0001] This utility model relates to the field of proximity sensors for electric spindles, and in particular to a proximity sensor for electric spindles. Background Technology

[0002] Electric spindles are core components of high-end CNC machine tools, high-speed milling, grinding, and precision machining. They integrate motors with spindles to achieve high speed, high precision, and high dynamic response. In electric spindle applications, proximity sensors are mainly used to detect key parameters such as speed, position, vibration, or tool status.

[0003] In the prior art, the proximity sensor for electric spindle has slots on both sides of the magnet, which makes it difficult to shield interference signals and causes the sensor to malfunction. Utility Model Content

[0004] The purpose of this invention is to provide a proximity sensor for electric spindles to solve the problem mentioned in the background art that interference signals are difficult to shield and the sensor may malfunction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: It includes a housing assembly comprising a metal housing and a hollow slot, a cable assembly comprising a dedicated cable and a circuit board, an induction shell at one end of the housing assembly, a magnetic core mechanism on one side of the induction shell, the magnetic core mechanism comprising a can-shaped single-opening ferrite core, a groove, a central post, and a single-sided slot, and a single-strand frameless coil disposed inside the magnetic core mechanism.

[0006] In a preferred embodiment, the metal casing has a hollow groove inside, and a dedicated cable is provided on the inner wall of the hollow groove. One end of the dedicated cable is fixedly connected to one side of the circuit board.

[0007] In a preferred embodiment, the inner wall of the end of the metal housing away from the dedicated cable is fixedly connected to the outer wall of the sensing housing, and one side of the sensing housing is fixedly connected to one side of the can-shaped single-opening ferrite core.

[0008] In a preferred embodiment, the can-shaped single-opening ferrite core has a groove inside, and the inner wall of the groove is fixedly connected to one end of the central column.

[0009] In a preferred embodiment, a single-sided groove is provided on one side of the groove, and the inner wall of the groove is movably connected to the outer wall of the single-strand frameless coil.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0011] 1. In this utility model, the single-opening ferrite core in the can shape has only a single-sided slot, which can shield interference signals in actual working conditions and ensure that the sensor will not malfunction.

[0012] 2. In this utility model, the inner wall of the single-strand frameless coil does not have a frame support, which allows it to be used in a very small space in terms of manufacturing process, and at the same time, it can make the performance parameters of the single-strand frameless coil more stable. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of a proximity sensor for an electric spindle provided by this utility model;

[0014] Figure 2 A lateral exploded view of a proximity sensor for an electric spindle provided by this utility model;

[0015] Figure 3 A longitudinal partially exploded view of a proximity sensor for an electric spindle provided by this utility model;

[0016] Figure 4 A schematic diagram of the magnetic core mechanism of a proximity sensor for an electric spindle provided by this utility model.

[0017] Legend:

[0018] 1. Housing assembly; 101. Metal housing; 102. Hollow slot; 2. Cable assembly; 201. Dedicated cable; 202. Circuit board; 3. Induction housing; 4. Magnetic core mechanism; 401. Can-shaped single-opening ferrite core; 402. Groove; 403. Central column; 404. Single-sided slot; 5. Single-strand frameless coil. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4This utility model provides a technical solution comprising: a housing assembly 1, the housing assembly 1 including a metal housing 101 and a hollow groove 102, a cable assembly 2 inside the housing assembly 1, the cable assembly 2 including a dedicated cable 201 and a circuit board 202, an induction shell 3 at one end of the housing assembly 1, a magnetic core mechanism 4 on one side of the induction shell 3, the magnetic core mechanism 4 including a can-shaped single-opening ferrite core 401, a groove 402, a central column 403 and a single-sided groove 404, and a single-strand frameless coil 5 inside the magnetic core mechanism 4.

[0021] In one embodiment, a hollow groove 102 is provided inside the metal casing 101, and a dedicated cable 201 is provided on the inner wall of the hollow groove 102. One end of the dedicated cable 201 is fixedly connected to one side of the circuit board 202.

[0022] Specifically: The dedicated cable 201 and the circuit board 202 are protected by a metal casing 101.

[0023] In one embodiment, the inner wall of the end of the metal housing 101 away from the dedicated cable 201 is fixedly connected to the outer wall of the sensing housing 3, one side of the sensing housing 3 is fixedly connected to one side of the can-shaped single-opening ferrite core 401, the can-shaped single-opening ferrite core 401 has a groove 402 inside, and the inner wall of the groove 402 is fixedly connected to one end of the central column 403.

[0024] Specifically: The single-opening ferrite core 401 of the can type only has a single-sided slot 404, which can shield interference signals in actual working conditions and ensure that the sensor will not malfunction.

[0025] In one embodiment, a single-sided groove 404 is provided on one side of the groove 402, and the inner wall of the groove 402 is movably connected to the outer wall of the single-strand frameless coil 5.

[0026] Specifically: The inner wall of the single-strand frameless coil 5 has no frame support, which allows it to be used in a very small space in terms of manufacturing process, and at the same time, it can make the performance parameters of the single-strand frameless coil 5 more stable.

[0027] Working principle: One end of the dedicated cable 201 is connected to the outer wall of the circuit board 202 by welding. Then, the dedicated cable 201 and the circuit board 202 are placed inside the hollow slot 102. The single-strand frameless coil 5 is placed inside the groove 402, so that the center of the single-strand frameless coil 5 is aligned with the center of the central column 403. After connecting the can-shaped single-opening ferrite core 401 to the induction shell 3, the induction shell 3 is installed on the end of the metal shell 101 away from the dedicated cable 201. During operation, the can-shaped single-opening ferrite core 401 mechanically shields the interference signal with only a single-sided slot 404.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A proximity sensor for an electric spindle, characterized in that, include: The housing assembly (1) includes a metal housing (101) and a hollow slot (102). A cable assembly (2) is provided inside the housing assembly (1). The cable assembly (2) includes a dedicated cable (201) and a circuit board (202). An induction shell (3) is provided at one end of the housing assembly (1). A magnetic core mechanism (4) is provided on one side of the induction shell (3). The magnetic core mechanism (4) includes a can-shaped single-opening ferrite core (401), a groove (402), a central column (403), and a single-sided slot (404). A single-strand frameless coil (5) is provided inside the magnetic core mechanism (4).

2. The proximity sensor for an electric spindle according to claim 1, characterized in that: The metal casing (101) has a hollow groove (102) inside, and a special cable (201) is provided on the inner wall of the hollow groove (102). One end of the special cable (201) is fixedly connected to one side of the circuit board (202).

3. A proximity sensor for an electric spindle according to claim 1, characterized in that: The inner wall of the metal shell (101) away from the dedicated cable (201) is fixedly connected to the outer wall of the sensing shell (3), and one side of the sensing shell (3) is fixedly connected to one side of the can-shaped single-opening ferrite core (401).

4. A proximity sensor for an electric spindle according to claim 1, characterized in that: The can-shaped single-opening ferrite core (401) has a groove (402) inside, and the inner wall of the groove (402) is fixedly connected to one end of the central column (403).

5. A proximity sensor for an electric spindle according to claim 4, characterized in that: A single-sided groove (404) is provided on one side of the groove (402), and the inner wall of the groove (402) is movably connected to the outer wall of the single-strand frameless coil (5).

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