CN213937676U - Speed measurement sensing device for motor - Google Patents
Speed measurement sensing device for motor Download PDFInfo
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- CN213937676U CN213937676U CN202121582592.4U CN202121582592U CN213937676U CN 213937676 U CN213937676 U CN 213937676U CN 202121582592 U CN202121582592 U CN 202121582592U CN 213937676 U CN213937676 U CN 213937676U
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- motor
- speed sensor
- end cover
- rotor shaft
- hall type
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Abstract
The utility model relates to the technical field of motors, in particular to a speed measurement sensing device for a motor, which comprises a Hall type speed sensor and a speed measurement gear sleeved on a motor rotor shaft, wherein the Hall type speed sensor is arranged on the circumferential surface of a motor end cover, and a sealing ring is arranged between the matching surface of the Hall type speed sensor and the motor end cover; the speed measuring gear is connected with the motor rotor shaft key, and the motor rotor shaft sleeve is provided with a shaft retainer ring for axially positioning the speed measuring gear. The Hall type speed sensor is arranged on the circumferential surface of the motor end cover, so that the axial installation space of the motor is effectively saved, and the light weight of the alternating current variable frequency motor is facilitated; a sealing ring is arranged between the matching surfaces of the Hall type speed sensor and the motor end cover, the sealing performance is good, and the integral protection level of the motor is improved.
Description
Technical Field
The utility model relates to the technical field of motors, more specifically say, relate to a motor is with sensing device that tests speed.
Background
In the field of electric vehicles such as forklifts and the like, in order to simplify the structure of an alternating current motor and improve the heat dissipation performance of the motor, a Hall type speed sensor is matched with a speed measuring gear to measure the rotating speed of a motor rotor.
Utility model discloses in application number 201420254191.X, the gear that tests the speed is fixed in the electric motor rotor axle through the nut on, the clamp plate compresses tightly the position of hall formula speedtransmitter cooperation gear on motor front end cover through the fixed of screw.
Mounting holes need to be reserved in a front end cover of the motor for the Hall type speed sensor and the speed measuring gear, the occupied axial space is large, and the requirement for light weight of the alternating current variable frequency motor is not facilitated; no protective sealing mode exists between the Hall type speed sensor and the mounting hole of the front end cover of the motor and between the speed measuring gear and the motor rotor shaft, so that the sealing performance of the motor is reduced, and the design requirement of a high-protection motor cannot be met.
In summary, how to reduce the axial occupied space of the speed measurement sensing device and improve the sealing performance of the motor is a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a speed sensor for motor, hall formula speedtransmitter installs in the periphery of motor end cover, and is equipped with the sealing washer between motor end cover and the hall formula speedtransmitter, has reduced required motor axial installation space, and has improved the sealing performance of motor.
In order to achieve the above object, the present invention provides the following technical solutions:
a speed measurement sensing device for a motor comprises a Hall type speed sensor and a speed measurement gear sleeved on a motor rotor shaft, wherein the Hall type speed sensor is installed on the circumferential surface of a motor end cover, and a sealing ring is arranged between the Hall type speed sensor and the matching surface of the motor end cover;
the speed measuring gear is connected with the motor rotor shaft through a key, and the motor rotor shaft sleeve is provided with a shaft retainer ring used for axially positioning the speed measuring gear.
Preferably, the speed measuring gear comprises a plurality of silicon steel sheets, a plurality of overlapping riveting points are arranged on the surfaces of the silicon steel sheets, and the silicon steel sheets are formed through overlapping the riveting points in a laminating mode.
Preferably, the silicon steel sheet is provided with a plurality of rivet holes for mounting rivets.
Preferably, the overlapped riveting points are uniformly distributed in the circumferential direction of the silicon steel sheet.
Preferably, the circumferential surface of the motor end cover is provided with a mounting boss, and the mounting boss is provided with a sensor mounting hole for mounting the hall-type speed sensor.
Preferably, the axis of the hall type speed sensor is located in a symmetrical plane where the speed measuring gear is perpendicular to the axis of the motor rotor shaft.
Preferably, the speed measuring gear is connected with the motor rotor shaft through a flat key.
In the speed measurement sensing device for the motor, the Hall type speed sensor is arranged on the circumferential surface of the motor end cover, so that the axial installation space of the motor is effectively saved, and the light weight of the alternating current variable frequency motor is facilitated; a sealing ring is arranged between the matching surfaces of the Hall type speed sensor and the motor end cover, the sealing performance is good, and the integral protection level of the motor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a specific embodiment of a speed measurement sensing device for a motor according to the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic front view of the speed measuring gear;
fig. 4 is a schematic cross-sectional view of the speed gear in a side view.
In fig. 1-4:
the motor comprises a motor end cover 01, a motor rotor shaft 02, a Hall type speed sensor 1, a sealing ring 2, a speed measuring gear 3, a silicon steel sheet 31, a superposed riveting point 32, a rivet 33, a key slot hole 34, a flat key 4, a shaft retainer ring 5 and a screw 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a motor is with sensing device that tests speed, hall formula speedtransmitter install in the periphery of motor end cover, and be equipped with the sealing washer between motor end cover and the hall formula speedtransmitter, have reduced required motor axial installation space, and have improved the sealing performance of motor.
Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a specific embodiment of a speed measurement sensing device for a motor according to the present invention; FIG. 2 is a schematic top view of FIG. 1; FIG. 3 is a schematic front view of the speed measuring gear; fig. 4 is a schematic cross-sectional view of the speed gear in a side view.
The utility model provides a speed measurement sensing device for a motor, which comprises a Hall type speed sensor 1 and a speed measurement gear 3 sleeved on a motor rotor shaft 02, wherein the Hall type speed sensor 1 is arranged on the circumferential surface of a motor end cover 01, and a sealing ring 2 is arranged between the matching surfaces of the Hall type speed sensor 1 and the motor end cover 01; the speed measuring gear 3 is connected with the motor rotor shaft 02 key, and the motor rotor shaft 02 sleeve is provided with a shaft check ring 5 for axially positioning the speed measuring gear 3.
The parameters such as the type and the precision of the hall-type speed sensor 1 are determined according to the parameters of the motor to be matched in actual production, and are not described in detail herein.
In order to facilitate connection of the hall speed sensor 1 to the circumferential surface of the motor end cover 01, preferably, the hall speed sensor 1 is connected to the circumferential surface of the motor end cover 01 by a screw 6.
In order to reduce the required axial installation space, the hall-type speed sensor 1 is arranged on the circumferential surface of the motor end cover 01. Preferably, in order to facilitate manufacturing of the motor end cover 01 and assembling of the hall-type speed sensor 1, a mounting boss is arranged on the circumferential surface of the motor end cover 01, and the mounting boss is provided with a sensor mounting hole for mounting the hall-type speed sensor 1.
The cross-sectional shape of the mounting boss can be circular, oval or any other geometric shape, which is not described in detail herein.
The speed measuring gear 3 is connected with the motor rotor shaft 02 key, and specifically can be in flat key connection, spline connection and the like.
Most of the speed measuring gear 3 is formed by processing carbon steel, but the magnetic conductivity of the carbon steel is not strong enough, so that pulse signals are easy to lose. Preferably, referring to fig. 3 and 4, the speed measuring gear 3 includes a plurality of silicon steel sheets 31, a plurality of riveting points 32 are disposed on the surface of the silicon steel sheet 31, and the silicon steel sheets 31 are laminated and molded through the riveting points 32. The speed measuring gear 3 formed by laminating the silicon steel sheets 31 has good magnetic conductivity, avoids loss of pulse signals, and improves the accuracy of the speed measuring sensing device for the motor.
The diameter of the silicon steel sheet 31 is the same as the design diameter of the speed measuring gear 3, and is determined according to the parameters of the motor needing to be matched in actual production.
Referring to fig. 3, the riveting points 32 may be set as one turn, or may be set as two or more turns, the number of turns of the riveting points 32 and the number of the riveting points 32 in each turn are related to the number of the silicon steel sheets 31, the thickness of the silicon steel sheets 31, the diameter of the silicon steel sheets 31, and other factors, and the specific number of the riveting points 32 is determined to ensure the strength of the speed measuring gear 3 and avoid the silicon steel sheets 31 from being scattered, loosened, and detached.
Preferably, the riveting points 32 are uniformly distributed in the circumferential direction of the silicon steel sheet 31, so as to ensure that each point of the silicon steel sheet 31 is relatively uniformly stressed, and the phenomena of sheet scattering, sheet loosening and sheet releasing are reduced.
In order to further reinforce the tacho gear 3, it is preferable that the silicon steel sheets 31 are provided with a plurality of rivet holes for installing the rivets 33, and the rivets 33 further enhance the connection between the silicon steel sheets 31 and improve the stacking precision of the silicon steel sheets 31.
In the embodiment, the Hall type speed sensor 1 is arranged on the circumferential surface of the motor end cover 01, so that the axial installation space of the motor is effectively saved, and the light weight of the alternating current variable frequency motor is facilitated; a sealing ring 2 is arranged between the matching surfaces of the Hall type speed sensor 1 and the motor end cover 01, the sealing performance is good, and the integral protection grade of the motor is improved.
Preferably, the axis of the hall-type speed sensor 1 is located in a symmetry plane of the tachometer gear 3 perpendicular to the axis of the motor rotor shaft 02.
Considering that spline machining is complex, in order to reduce manufacturing difficulty and manufacturing cost, it is preferable that the speed measuring gear 3 is connected with the motor rotor shaft 02 through a flat key 4. Referring to fig. 3, the center of the silicon steel sheet 31 is provided with a shaft hole for mounting the motor rotor shaft 02 and a key slot hole 34 for mounting the flat key 4, and the shape of the key slot hole 34 is the same as the cross-sectional shape of the flat key 4; the key slot hole 34 communicates with the shaft hole.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides a motor is with sensing device that tests speed has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. A speed measurement sensing device for a motor comprises a Hall type speed sensor (1) and a speed measurement gear (3) sleeved on a motor rotor shaft (02), and is characterized in that the Hall type speed sensor (1) is installed on the circumferential surface of a motor end cover (01), and a sealing ring (2) is arranged between the matching surfaces of the Hall type speed sensor (1) and the motor end cover (01);
the speed measuring gear (3) is connected with the motor rotor shaft (02) in a key mode, and the motor rotor shaft (02) is sleeved with a shaft retainer ring (5) which is used for positioning the speed measuring gear (3) in the axial direction.
2. The motor speed measurement sensing device according to claim 1, wherein the speed measurement gear (3) comprises a plurality of silicon steel sheets (31), a plurality of stacked riveting points (32) are arranged on the surface of the silicon steel sheets (31), and the silicon steel sheets (31) are laminated through the stacked riveting points (32).
3. The motor speed sensor according to claim 2, characterized in that said silicon steel sheet (31) is provided with a plurality of rivet holes for mounting rivets (33).
4. The motor speed sensor device according to claim 2, wherein the staking points (32) are evenly distributed in the circumferential direction of the silicon steel sheet (31).
5. A speed measuring and sensing device for a motor according to any one of claims 1-4, wherein the circumferential surface of the motor end cover (01) is provided with a mounting boss, and the mounting boss is provided with a sensor mounting hole for mounting the Hall type speed sensor (1).
6. A tacho sensing device for motors according to any of claims 1-4 characterized in that the axis of the Hall type speed sensor (1) is located in the symmetry plane of the tacho gear (3) perpendicular to the axis of the motor rotor shaft (02).
7. A speed measuring sensor device for motor according to any of claims 1-4 characterized in that said speed measuring gear (3) is connected with said motor rotor shaft (02) by a flat key (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121582592.4U CN213937676U (en) | 2021-07-13 | 2021-07-13 | Speed measurement sensing device for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121582592.4U CN213937676U (en) | 2021-07-13 | 2021-07-13 | Speed measurement sensing device for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213937676U true CN213937676U (en) | 2021-08-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121582592.4U Active CN213937676U (en) | 2021-07-13 | 2021-07-13 | Speed measurement sensing device for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213937676U (en) |
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2021
- 2021-07-13 CN CN202121582592.4U patent/CN213937676U/en active Active
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