CN220934918U - Disk type printed winding DC velometer - Google Patents

Abstract

The utility model discloses a disk type printed winding direct current velometer, which comprises a casing formed by a front end annular cover, an annular seat and a rear end annular cover, wherein a hollow shaft is coaxially arranged in the casing through a bearing, a rotor which keeps a uniform air gap with a stator is coaxially arranged on the hollow shaft, the rotor is an armature winding which is arranged close to the front end annular cover, the stator comprises a plurality of pairs of permanent magnet poles which are uniformly distributed and arranged on a yoke plate in a circumferential manner, the yoke plate is arranged on the rear end annular cover through an annular gasket, a brush holder which is arranged in the casing is arranged on the rear end annular cover, brush sleeves which extend towards the armature winding are arranged in the brush holder, and carbon brushes which extend out of the brush sleeves under the action of springs and are pressed on the armature winding are arranged in the brush sleeves. The utility model is an independent mechanism, has compact structure, flat shape, small axial dimension, simple structure, small number of parts, reduced processing amount, low manufacturing and assembling complexity, reduced cost and improved reliability.

Description

Disk type printed winding DC velometer

Technical Field

The utility model relates to a printing winding motor control technology, in particular to a disc type printing winding direct current velometer.

Background

The technical proposal of the common magnetic field printed winding DC motor-velometer set with the authorization bulletin number of CN201298785Y is that a shaft passes through a front end cover and a rear end cover which are in closed connection with a machine base to form a machine shell, a permanent magnet stator is a front yoke plate and a rear yoke plate which are fixed with permanent magnet poles, and the front yoke plate and the rear yoke plate are respectively fixedly arranged on the front end cover and the rear end cover; the rotor is a printed winding armature arranged on a shaft and is positioned between a front yoke plate and a rear yoke plate, the rotor comprises a host armature and a velometer armature, and the two armatures are mutually abutted and separated by an insulating material to form a thin disc-shaped coreless integral rotor; the main machine brush arranged on the rear end cover is contacted with the winding plane of the main machine armature, and the velometer brush arranged on the front end cover is contacted with the winding plane of the velometer armature; the permanent magnet stator, the host armature and the host brush form a motor, and the permanent magnet stator, the velometer armature and the velometer brush form velometer which work respectively.

In the technical scheme of the common magnetic field printed winding direct current motor-speed measuring machine set, because the common magnetic field printed winding direct current motor-speed measuring machine set is designed independently as a whole, the speed measuring requirements of various control motors are required to be designed independently in a targeted manner, and the requirements of different types of motor speed measuring requirements and the requirements of customer diversity selection cannot be met.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model aims to solve the technical problem of providing a disc type printed winding direct current velometer with wider adaptability.

The technical scheme of the disk type printed winding direct current velometer capable of solving the technical problems comprises a casing consisting of a front end ring cover, a ring seat and a rear end ring cover, wherein a hollow shaft is coaxially arranged in the casing through a bearing, a rotor which maintains a uniform air gap with a stator is coaxially arranged on the hollow shaft, and the difference is that: the rotor is an armature winding which is arranged close to the front end cover, the stator comprises a plurality of pairs of permanent magnetic poles which are uniformly distributed on the circumference of the stator, the yoke is arranged on the rear end cover through a ring pad, brush holders which are positioned in the machine shell are arranged on the rear end cover, brush sleeves which extend towards the armature winding are arranged in the brush holders, and carbon brushes which extend out of the brush sleeves under the action of springs and are pressed on the armature winding are arranged in each brush sleeve.

The hollow shaft is locked on the rotating shaft of the motor to be tested, and the structure is as follows: the tapered rear part of the hollow shaft is provided with a plurality of axial shrinkage grooves uniformly distributed on the circumference, the tight shaft taper sleeve is sleeved on the tapered rear part of the hollow shaft and screwed on the thrust nut, and the thrust nut is screwed on the hollow shaft and limits the bearing.

The hollow shaft and the bearing can be matched with each other according to the shaft diameter of the rotating shaft of the motor to be tested.

The utility model has the beneficial effects that:

1. The disk type printed winding direct current velometer is an independent mechanism, has compact structure, flat shape and small axial size, and compared with a common magnetic field printed winding direct current motor-velometer set, the disk type printed winding direct current velometer set has the advantages of simple structure, small number of parts, reduced processing amount, low manufacturing and assembling complexity, reduced cost and improved reliability.

2. The utility model adopts a hollow shaft structure with a contraction groove, and the hollow shaft is locked on the rotating shaft of the motor to be tested through the tight shaft taper sleeve, so that the installation and the use are simple and convenient.

3. By adopting the technology, the motor measuring device can adapt to measuring motors with different shaft diameters only by replacing hollow shafts with different inner diameters, has wider applicability and further reduces the production cost.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Drawing number identification: 1. a front end ring cover; 2. a ring seat; 3. a rear end cap; 4. a bearing; 5. a hollow shaft; 5-1, a shrinkage groove; 6. a permanent magnet pole; 7. an armature winding; 8. a yoke plate; 9. a ring pad; 10. a brush holder; 11. a brush sleeve; 12. a spring; 13. a carbon brush; 14. a shaft tightening taper sleeve; 15. a thrust nut; 16. and a bearing inner cover.

Detailed Description

The technical scheme of the utility model is further described below with reference to the embodiment shown in the drawings.

The utility model relates to a disc type printed winding direct current velometer, which comprises a casing, wherein the casing is locked on a rotating shaft of a motor to be measured through a coaxial hollow shaft 5, and a rotor and a stator which can establish a large air gap axial magnetic field and an electric brush which is arranged corresponding to the rotor are arranged in the casing, as shown in figure 1.

The shell comprises a front end annular cover 1 and a rear end annular cover 3 which are coaxial, a coaxial annular seat 2 is arranged between the outer edges of the front end annular cover 1 and the rear end annular cover 3, and the front end annular cover 1, the annular seat 2 and the rear end annular cover 3 are fixedly connected into a whole by adopting bolt assemblies uniformly distributed on the circumference, as shown in figure 1.

The hollow shaft 5 is coaxially arranged between the central holes of the front end annular cover 1 and the rear end annular cover 3, the hollow shaft 5 is stepped with gradually reduced shaft diameter from front to back, 4 axially slender shrinkage grooves 5-1 uniformly distributed in circumference are formed in the rear part of the hollow shaft 5 extending out of the central hole of the rear end annular cover 3, the outer surface chamfer of the rear end of the hollow shaft 5 forms a cone, the front end of the hollow shaft 5 is positioned in the annular hole of the front end annular cover 1, and straight lines are machined on the middle shaft step of the hollow shaft 5 and an upper bearing 4 is arranged, as shown in figure 1.

The rotor is a disc-shaped armature winding 7 arranged close to the front end ring cover 1, and the armature winding 7 is sleeved on a corresponding shaft step of the hollow shaft 5 (the front end surface is limited by the corresponding step) and is fixed by bonding with insulating embryo cloth, as shown in figure 1.

The stator is a plurality of pairs of permanent magnet poles 6 (neodymium iron boron magnetic poles) which are uniformly distributed on the annular yoke plate 8 in the circumference and keep a uniform air gap with the armature winding 7, N, S poles of the plurality of pairs of permanent magnet poles 6 on any one side in the axial direction are adjacent to each other and uniformly distributed along the circumference, an annular pad 9 with a central hole is coaxially arranged between the yoke plate 8 and the rear end annular cover 3, and the yoke plate 8, the annular pad 9 and the rear end annular cover 3 are fastened into a whole by screws uniformly distributed in the circumference, as shown in fig. 1.

The electric brush comprises a brush holder 10 (with a central hole) coaxially arranged in the machine shell on the rear end cover 3, two groups of four brush sleeves 11 extending to the armature winding 7 are arranged in the brush holder 10, carbon brushes 13 press-fitted on springs 12 are arranged in the brush sleeves 11, the springs 12 push the carbon brushes 13 out of the brush sleeves 11 to press the carbon brushes against the armature winding 7, an armature gap between the armature winding 7 and the permanent magnet pole 6 can be adjusted by increasing or decreasing gaskets between the bearing 4 and the hollow shaft 5, the bearing 4 is tightly connected with the brush holder 10 through spring belts, and the front end of the bearing 4 is limited by a bearing inner cover 16 arranged in the machine shell, as shown in fig. 1.

The rear part of the hollow shaft 5 is screwed with a thrust nut 15 penetrating through the central holes of the rear end ring cover 3 and the brush holder 10 and limiting the rear end of the bearing 4, the rear end cone of the hollow shaft 5 is sleeved with a tight shaft taper sleeve 14, the tight shaft taper sleeve 14 is screwed on the thrust nut 15 through bolts uniformly distributed on the circumference, and the tight shaft taper sleeve 14 contracts the rear part of the hollow shaft 5 on the rotating shaft of the motor to be tested, so that the hollow shaft 5 is locked on the rotating shaft of the motor to be tested, as shown in figure 1.

The hollow shaft 5 and the bearing 4 can be selected to be matched with each other according to the shaft diameter of the rotating shaft of the motor to be tested.

Claims (3)

1. The utility model provides a disc printing winding direct current velometer, includes the casing that comprises front end ring cover (1), ring seat (2) and rear end ring cover (3), through bearing (4) coaxial arrangement hollow shaft (5) in the casing, coaxial arrangement has the rotor that keeps even air gap with the stator on hollow shaft (5), its characterized in that: the rotor is an armature winding (7) which is close to a front end ring cover (1), the stator comprises a plurality of pairs of permanent magnet poles (6) which are uniformly distributed on a yoke plate (8) in circumference, the yoke plate (8) is arranged on a rear end ring cover (3) through a ring pad (9), a brush holder (10) which is positioned in a machine shell is arranged on the rear end ring cover (3), brush sleeves (11) which extend towards the armature winding (7) are arranged in the brush holder (10), and carbon brushes (13) which extend out of the brush sleeves (11) under the action of springs (12) and are pressed on the armature winding (7) are arranged in each brush sleeve (11).

2. The disc printed winding dc velocimeter of claim 1, characterized in that: the tapered rear part of the hollow shaft (5) is provided with a plurality of axial shrinkage grooves (5-1) uniformly distributed on the circumference, a tight shaft taper sleeve (14) is sleeved on the tapered rear part of the hollow shaft (5) and is screwed on a thrust nut (15), and the thrust nut (15) is screwed on the hollow shaft (5) and limits a bearing (4).

3. The disc printed winding dc velocimeter of claim 2, characterized in that: the hollow shaft (5) and the bearing (4) can be matched with each other according to the shaft diameter of the rotating shaft of the motor to be measured.