Magnetic sensitive angle sensor

Abstract

The utility model relates to a magneto-sensitive angle sensor, which comprises a shell, an assembly cavity arranged at one end in the shell, an installation cavity arranged at the other end in the shell, a magneto-sensitive chip arranged in the assembly cavity, an installation groove arranged at one end of the shell and communicated with the installation cavity, a bearing arranged in the installation groove, a rotating shaft inserted into the installation groove, and a shaft gear sleeved on the rotating shaft, one end of the rotating shaft is provided with a fixing block with magnetic steel, and the fixing block penetrates through the mounting groove and is inserted into the mounting cavity; according to the utility model, the oil resistance is effectively improved, the output signal is simple, and the use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial equipment technical field, concretely relates to a magnetic angle sensor. BACKGROUND

[0002] The magnetic angle sensor is a kind of sensor that can perceive angle and react to angle change. It is mainly used to measure rotation speed and angle, has the characteristics and advantages such as non-contact non-friction, high reliability long life, good linearity, high resolution, small rotation torque, good frequency response characteristics, built-in temperature compensation circuit, etc., and is widely used in industrial machinery, engineering machinery, construction equipment, petrochemical equipment, medical equipment, aerospace instruments and meters, national defense industry and other fields. In addition, it is also suitable for automobile electronics, automatic robots, motion control, rotating motor rotation and control and other fields.

[0003] The angle sensor in servo control system is usually selected from potentiometer or brushless rotary transformer, adopts bearing coupling to form integrated structure, generally bearing is ball bearing, needs to inject lubricating grease, and it is not conducive to the use environment with oil resistance requirement. Potentiometer has contact type brush structure, which limits the improvement of reliability and reduces environmental adaptability. Brushless rotary transformer adopts annular transformer for signal transmission between stator and rotor, increases the volume, and at the same time, since the output signal is analog sine wave, the signal solving process is more responsible, and the cost is increased.

[0004] Therefore, it is necessary to provide a new technical scheme to overcome the above defects. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of magnetic angle sensor that can effectively solve the above technical problems.

[0006] To achieve the purpose of the utility model, the following technical solutions are adopted:

[0007] A kind of magnetic angle sensor, characterized by: including shell, assembly cavity in one end in shell, installation cavity in the other end in shell, magnetic sensitive chip in assembly cavity, installation groove in one end of shell and being communicated with installation cavity, bearing in installation groove, shaft inserted with installation groove, shaft stopper on the shaft;Wherein, the one end of the shaft is provided with the fixed block with magnetic steel, the fixed block penetrates installation groove and is inserted installation cavity.

[0008] Further, the bearing is self-lubricating bearing.

[0009] Further, one end of the shell is provided with end cover that closes assembly cavity.

[0010] Further, the end cover is provided with glue pouring hole.

[0011] Further, the mounting cavity and the assembly cavity are provided with an insulating partition plate.

[0012] Further, one end of the rotating shaft is provided with a clamping groove for clamping a shaft stop.

[0013] Further, the shaft stop and the bearing are provided with a gasket.

[0014] Further, the fixing block and the mounting cavity are provided with a gasket.

[0015] Further, the gasket is made of polytetrafluoroethylene resin.

[0016] Further, the bearing and the shell are coupled through interference fit.

[0017] Compared with the prior art, the utility model has the beneficial effects that the utility model effectively improves oil resistance, and simple output signal, convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are used to provide further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.

[0019] Fig. 1 It is the perspective view of the utility model.

[0020] Fig. 2 It is the sectional view of the utility model.

[0021] Fig. 3 It is the structural schematic view of the utility model.

[0022] In the drawing: 1, shell;10, assembly cavity;11, mounting cavity;12, magnetic sensitive chip;13, mounting groove;14, bearing;15, rotating shaft;16, shaft stop;17, magnetic steel;18, fixing block;19, end cover;20, glue pouring hole;21, gasket;22, gasket;23, clamping groove;24, insulating partition plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will be combined with the technical scheme in the embodiments of the utility model to make clear and complete description, obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments.

[0024] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the protection scope of the utility model, which does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model. When a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. When a component is referred to as "provided on" another component, it can be directly provided on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes.

[0025] As shown in Figs. 1 to 3 A magnetic angle sensor, which comprises a shell 1, an assembly cavity 10 arranged at one end in the shell 1, a mounting cavity 11 arranged at the other end in the shell 1, a magnetic sensitive chip 12 arranged in the assembly cavity 10, a mounting groove 13 arranged at one end of the shell 1 and communicated with the mounting cavity 11, a bearing 14 arranged in the mounting groove 13, a rotating shaft 15 inserted into the mounting groove 13, and a shaft stop 16 sleeved on the rotating shaft 15; wherein one end of the rotating shaft 15 is provided with a fixed block 18 with a magnetic steel 17, the fixed block 18 penetrates through the mounting groove 13 and is inserted into the mounting cavity 11; in the embodiment, the outer ring of the bearing 14 is connected with the shell 1 through interference fit, and the inner ring of the bearing 14 is connected with the rotating shaft 15 through the shaft stop 16, so that the structure is simple and the installation is convenient; the magnetic sensitive chip 12 is programmable, the magnetic steel 17 is assembled on the rotating shaft 15 and placed in the shell 1, so that the magnetic steel 17 and the magnetic sensitive chip 12 are both located in the shell 1, when the rotating shaft 15 rotates, the magnetic sensitive circuit on the magnetic sensitive chip 12 can detect the magnetic field change generated by the rotation and process the output square wave signal with different duty cycles, so as to realize angle signal transmission, and the user can calibrate the angle measurement accuracy through the programmable magnetic sensitive chip, thereby improving the angle measurement accuracy.

[0026] Further, the bearing 14 is a self-lubricating bearing, by arranging the self-lubricating bearing, it is not necessary to add lubricating oil, so that the bearing 14 can work reliably in different oily media, and the oil resistance of the sensor is improved.

[0027] The shell 1 is provided with an end cover 19 closing the assembly cavity 10, and the end cover 19 is provided with a glue pouring hole 20; in the embodiment, the glue pouring hole 20 is used for pouring epoxy resin glue into the shell 1 to seal and protect the magnetic sensitive chip 12, so that the oil medium cannot enter the magnetic sensitive chip 12, and corrosion and dissolution of the magnetic sensitive chip 12 are avoided.

[0028] Further, the mounting cavity 11 is provided with an insulating partition plate 24 between the mounting cavity 11 and the assembly cavity 10; by arranging the insulating partition plate 24, the epoxy resin glue can be prevented from entering the rotor rotating space, so that the mounting cavity 11 is prevented from generating excess materials, the rotating torque is prevented from being increased, stuck or even stopped, and the implementation effect of the embodiment is enhanced.

[0029] One end of the rotating shaft 15 is provided with a clamping groove 23 used for clamping a shaft stop 16, and the shaft stop 16 is provided with a gasket 21 between the shaft stop 16 and the bearing 14; by arranging the gasket 21 and the clamping groove 23, friction between the shaft stop 16 and the bearing 14 can be effectively avoided, the gap between the shaft stop 16 and the bearing 14 is reduced, the shaft stop 16 is prevented from falling off, and the connecting structure of the embodiment is enhanced.

[0030] Further, the mounting cavity 11 is provided with a gasket 22 between the mounting cavity 11 and the mounting block 18; the gasket 22 is made of polytetrafluoroethylene resin, and the sealing property of the embodiment is effectively enhanced by arranging the gasket 22.

[0031] Working principle: the outer ring of the bearing 14 is connected with the shell 1 through interference fit, the inner ring of the bearing 14 is connected with the rotating shaft 15 through the shaft stop 16, the magnetic steel 17 is assembled on the rotating shaft 15 and is placed in the shell 1, so that the magnetic steel 17 and the magnetic sensitive chip 12 are located in the shell 1, and when the rotating shaft 15 rotates, the magnetic sensitive circuit on the magnetic sensitive chip 12 can detect the magnetic field change generated by rotation.

[0032] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connecting mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, the circuit connection adopts the conventional connecting mode in the prior art, and details are not described herein, and the contents not described in detail in the description belong to the prior art known to the person skilled in the art.

[0033] It should be understood that the above description can be improved or changed by the person skilled in the art, and all the improvements and changes shall belong to the protection scope of the appended claims of the utility model.

Claims

1. A magnetic angle sensor, characterized by: The utility model relates to a magnetic sensitive sensor, including shell (1), the assembly cavity (10) of being located in the one end of shell (1), the installation cavity (11) of being located in the other end of shell (1), the magnetic sensitive chip (12) of being located in the assembly cavity (10), the installation slot (13) of being located in one end of shell (1) and with installation cavity (11) intercommunication, bearing (14) is located in installation slot (13), the rotating shaft (15) of being inserted with installation slot (13), the axle stop (16) of being set on rotating shaft (15), wherein, one end of rotating shaft (15) is equipped with the fixed block (18) with magnetic steel (17), the fixed block (18) penetrates installation slot (13) and inserts installation cavity (11).

2. A magnetic angle sensor as claimed in claim 1, characterized in that: The bearing (14) is a self-lubricating bearing.

3. A magnetic angle sensor as claimed in claim 2, characterized in that: One end of the shell (1) is provided with an end cover (19) for closing the assembly cavity (10).

4. A magnetic angle sensor as claimed in claim 3, characterized in that: The end cover (19) is provided with a glue pouring hole (20).

5. A magnetic angle sensor as claimed in claim 4, characterized in that: An insulating partition (24) is arranged between the installation cavity (11) and the assembly cavity (10).

6. A magnetic angle sensor as claimed in claim 5, characterized in that: One end of the rotating shaft (15) is provided with a clamping groove (23) for clamping the axle stop (16).

7. A magnetic angle sensor as claimed in claim 6, characterized in that: A gasket (21) is arranged between the axle stop (16) and the bearing (14).

8. A magnetic angle sensor as claimed in claim 7, characterized in that: A gasket (22) is arranged between the fixed block (18) and the installation cavity (11).

9. A magnetic angle sensor as claimed in claim 8, characterized in that: The gasket (22) is made of polytetrafluoroethylene resin.

10. A magnetic angle sensor as claimed in claim 1, characterized in that: The bearing (14) and the shell (1) are coupled by interference fit.

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