CN112838725A

CN112838725A - Motor rotor expansion positioning device

Info

Publication number: CN112838725A
Application number: CN202110219475.XA
Authority: CN
Inventors: 李加泽; 马亮
Original assignee: Jieyun Intelligent Equipment Suzhou Co ltd
Current assignee: Jieyun Intelligent Equipment Suzhou Co ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-05-25

Abstract

The invention discloses an expansion positioning device for a motor rotor, which comprises a positioning shaft, an inner supporting conical shaft, an expansion sleeve, a fixed seat and a driving cylinder, wherein the positioning shaft, the inner supporting conical shaft, the expansion sleeve, the fixed seat and the driving cylinder are coaxially arranged from top to bottom; the expansion sleeve is arranged between the inner support conical shaft and the fixing seat and sleeved on the inner support conical shaft, the driving cylinder drives the inner support conical shaft to move downwards to extrude the expansion sleeve, so that the outer diameter of the expansion sleeve is expanded outwards for positioning, and the inner support conical shaft, the expansion sleeve and the driving cylinder form a second positioning mechanism; and the inner supporting conical shaft is fixedly connected with the positioning shaft, and the first positioning mechanism and the second positioning mechanism are positioned synchronously. The invention is provided with the first positioning mechanism and the second positioning mechanism which are positioned synchronously, so that the rotor shaft, the lower dynamic balance plate, the cast aluminum rotor and the upper dynamic balance plate are coaxially arranged for press mounting, the concentricity of the rotor shaft, the lower dynamic balance plate, the cast aluminum rotor and the upper dynamic balance plate is ensured to the greatest extent, and the processing precision is improved.

Description

Motor rotor expansion positioning device

Technical Field

The invention relates to the technical field of mechanical press fitting, in particular to an expansion positioning device for a motor rotor.

Background

The rotor of the motor product is a component formed by combining various materials and a plurality of parts, bears the function of converting the motor into mechanical energy, is a rotating part of the motor product, and is also a butt joint component of matched equipment.

The motor rotor is composed of an upper dynamic balance plate, a lower dynamic balance plate, a cast aluminum rotor and a rotor shaft, and is usually assembled by adopting a hot sleeve type. Need carry out induction heating to dynamic balance board, cast aluminium rotor about going up during the rotor assembly, nevertheless because this three part size and material are different, the aperture difference after the three part heating is great, can't realize the central location through the fixed round pin of diameter, and unable central location can lead to at the pressure equipment in-process, the rotor shaft will be gone down the dynamic balance board gnawing.

Therefore, how to realize the concentric press mounting among the upper dynamic balance plate, the lower dynamic balance plate, the cast aluminum rotor and the rotor shaft is a problem which needs to be solved urgently at present.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides an expansion positioning device for a motor rotor.

The purpose of the invention is realized by the following technical scheme:

the motor rotor expansion positioning device comprises a positioning shaft, an inner supporting conical shaft, an expansion sleeve, a fixed seat and a driving cylinder which are coaxially arranged from top to bottom, wherein a positioning pin for positioning is arranged in the positioning shaft, and the positioning shaft and the positioning pin form a first positioning mechanism; the expansion sleeve is arranged between the inner support conical shaft and the fixing seat and sleeved on the inner support conical shaft, the driving cylinder is connected with the inner support conical shaft and drives the inner support conical shaft to move downwards to extrude the expansion sleeve, so that the outer diameter of the expansion sleeve is expanded outwards to be positioned, and the inner support conical shaft, the expansion sleeve and the driving cylinder form a second positioning mechanism; and the inner supporting conical shaft is fixedly connected with the positioning shaft, so that the first positioning mechanism and the second positioning mechanism are positioned synchronously.

Preferably, the top of the positioning shaft is provided with an opening, a hollow accommodating cavity extends from the opening to the inside of the positioning shaft, and the positioning pin is arranged at the axis of the accommodating cavity; the bottom of the positioning shaft is provided with an inserted bar which extends outwards from the axis of the positioning shaft, and the inserted bar is inserted into the inner support conical shaft.

Preferably, the accommodating cavity is T-shaped, an inward concave part is arranged at the axis of the cavity bottom of the accommodating cavity, a convex rod matched with the concave part is arranged at the bottom of the positioning pin, the convex rod is inserted into the concave part, a spring is arranged between the convex rod and the concave part, and two ends of the spring are respectively abutted to the convex rod and the concave part.

Preferably, the inner supporting conical shaft is T-shaped, the head of the inner supporting conical shaft abuts against the positioning shaft, the rod of the inner supporting conical shaft is arranged in the fixed seat and connected with the driving cylinder, the axis of the head is provided with an insertion hole extending downwards from the top of the head, and the insertion rod is fixedly arranged in the insertion hole.

Preferably, the bottom of the inserted bar is provided with a first annular groove along the outer wall thereof, the bar part of the inner supporting cone shaft is annularly and uniformly distributed with a group of through holes communicated with the jack along the side wall thereof, and a first fastening screw penetrates through the through holes and is abutted against the first annular groove so as to fasten the positioning shaft and the inner supporting cone shaft together.

Preferably, a group of waist-shaped holes are uniformly distributed on the side wall of the fixing seat, the waist-shaped holes are vertically arranged, and the length of the waist-shaped holes is not less than the moving distance of the inner support conical shaft.

Preferably, the expansion sleeve comprises a first portion and a second portion which are connected, a connecting surface is arranged between the first portion and the second portion, the first portion is attached to the head in a sliding mode, strip-shaped gaps extending downwards from an opening of the first portion are evenly distributed on the side wall of the first portion, the diameter of the second portion is smaller than that of the first portion, and the second portion is embedded in the fixing seat and fixedly connected with the fixing seat through a second fastening screw.

Preferably, the head part is provided with an outer conical surface with the diameter gradually reduced from top to bottom, the inner wall of the first part is provided with an inner conical surface matched with the outer conical surface, the outer conical surface is attached to the inner conical surface, and the outer conical surface moves downwards along the inner conical surface to prop open the first part and expand the outer diameter of the first part.

Preferably, the fixing base has on the bottom plate, the bottom of bottom plate has set firmly a set of bracing piece, the bracing piece erect drive actuating cylinder on, the actuating lever that drives actuating cylinder stretches into the inside of fixing base with the internal stay conical shaft rigid coupling.

Preferably, a limit threaded sleeve is sleeved on the driving rod and located between the bottom plate and the driving cylinder, and the moving range of the driving rod is limited.

The invention has the following beneficial effects:

1. the first positioning mechanism and the second positioning mechanism are arranged for synchronous positioning, the lower dynamic balance plate, the cast aluminum rotor and the upper dynamic balance plate are simultaneously sleeved outside the positioning shaft, the lower dynamic balance plate is positioned through the second positioning mechanism to fix the position of the lower dynamic balance plate, and the first positioning mechanism positions the rotor shaft, so that the rotor shaft, the lower dynamic balance plate, the cast aluminum rotor and the upper dynamic balance plate are coaxially arranged, press fitting can be simultaneously carried out, the press fitting efficiency is greatly improved, the concentricity of the four is ensured to the maximum extent, and the machining precision is improved;

2. the upper dynamic balance plate is sleeved outside the positioning shaft, and the lower dynamic balance plate is positioned by using the expansion sleeve, so that the edge gnawing phenomenon of the upper dynamic balance plate and the lower dynamic balance plate is effectively avoided, the processing precision is improved, and the rejection rate is reduced;

3. the annular groove is arranged to be matched with the fastening screw, so that the inner support conical shaft, the positioning shaft, the expansion sleeve and the fixing seat are effectively and respectively fixed together, the waist-shaped hole is arranged to avoid the position, and meanwhile, the first fastening screw is convenient to install and replace due to the arrangement of the waist-shaped hole;

4. the limiting threaded sleeve is arranged to limit the moving distance of the driving rod, and the phenomenon that the excessive displacement of the driving rod causes the excessive extrusion of the expansion sleeve, so that the dynamic balance plate is damaged is avoided.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1: a schematic diagram of an embodiment of the invention;

FIG. 2: an enlarged view of portion a in fig. 1;

FIG. 3: a cross-sectional view of an embodiment of the invention;

FIG. 4: a partial cross-sectional view of an embodiment of the invention;

FIG. 5: the embodiment of the invention has a cross section in a use state;

FIG. 6: the section view of the embodiment of the invention under the state that the expansion sleeve is loosened;

FIG. 7: the section view of the expansion sleeve in the expansion state in the embodiment of the invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

As shown in fig. 1 to 7, the invention discloses an expansion positioning device for a motor rotor, which comprises a positioning shaft 1, an inner supporting conical shaft 2, an expansion sleeve 3, a fixed seat 4 and a driving cylinder 5, which are coaxially arranged from top to bottom, wherein a positioning pin 6 for positioning is arranged in the positioning shaft 1, and the positioning shaft 1 and the positioning pin 6 form a first positioning mechanism; the expansion sleeve 3 is arranged between the inner support conical shaft 2 and the fixed seat 4 and sleeved on the inner support conical shaft 2, the driving cylinder 5 drives the inner support conical shaft 2 to move downwards to extrude the expansion sleeve 3, so that the outer diameter of the expansion sleeve 3 is expanded outwards to be positioned, and the inner support conical shaft 2, the expansion sleeve 3 and the driving cylinder 5 form a second positioning mechanism; and the inner supporting conical shaft 2 is fixedly connected with the positioning shaft 1, so that the first positioning mechanism and the second positioning mechanism can be synchronously positioned.

Specifically, as shown in fig. 3 and 4, the top of the positioning shaft 1 has an opening, a hollow accommodating cavity 101 extends from the opening to the inside of the positioning shaft, and the positioning pin 6 is disposed at the axis of the accommodating cavity 101. In the present invention, the positioning pin 6 is used for positioning the rotor shaft 11, and the top of the positioning pin 6 is tapered so as to be inserted into the rotor shaft 11.

Further, in order to reduce the hard contact between the rotor shaft 11 and the positioning pin 6, the accommodating cavity 101 is T-shaped, an inner concave recess 103 is formed in the axis of the cavity bottom, a protruding rod 601 matched with the recess 103 is arranged at the bottom of the positioning pin 6, the protruding rod 601 is inserted into the recess 103, a spring 15 is arranged between the protruding rod 601 and the recess 103, and two ends of the spring 15 are respectively abutted to the protruding rod 601 and the recess 103. The spring 15 mainly serves as a shock absorber to reduce wear on the rotor shaft 11. In other possible embodiments, the spring 15 may be replaced by other elastic members having a shock-absorbing function.

As shown in fig. 3 to 5, the bottom of the positioning shaft 1 of the present invention has a plug rod 102 extending outward from the axial center thereof. The inner supporting conical shaft 2 is T-shaped, the head portion 201 of the inner supporting conical shaft is abutted to the positioning shaft 1, the rod portion 202 of the inner supporting conical shaft is arranged in the fixing seat 4 and connected with the driving air cylinder 5, the axis of the head portion 201 is provided with an insertion hole 203 extending downwards from the top of the insertion hole, and the insertion rod 102 is fixedly arranged in the insertion hole 203 so as to realize that the inner supporting conical shaft 2 is fixedly connected with the positioning shaft 1.

Specifically, the bottom of the inserted link 102 is provided with a first annular groove 104 along the outer wall thereof, the rod portion 202 of the inner support cone shaft 2 is uniformly and annularly provided with a group of through holes 204 along the side wall thereof, the through holes 204 are communicated with the insertion hole 203, and the first fastening screws 7 penetrate through the through holes 204 and abut against the first annular groove 104, so as to fasten the positioning shaft 1 and the inner support cone shaft 2 together. Because the internal stay conical shaft 2 is arranged in the fixed seat 4, the annular structure of the first ring groove 104 has a larger fault-tolerant rate compared with other hole-shaped structures, and the first fastening screw 7 can be fixedly connected with the first ring groove 104.

Similarly, the outer wall of the expansion sleeve 3 also has a second annular groove 305, the outer wall of the fixed seat 4 has a through hole 403, and a second fastening screw 8 passes through the through hole 403 to abut against the second annular groove 305 to fasten the expansion sleeve 3 and the fixed seat 4 together.

In order to facilitate the installation of the first fastening screw 7, a group of waist-shaped holes 401 are uniformly distributed on the side wall of the fixed seat 4, the waist-shaped holes 401 are vertically arranged, and the length of each waist-shaped hole is not less than the moving distance of the inner support conical shaft 2.

As shown in fig. 1 to 5, the expansion sleeve 3 includes a first portion 301 and a second portion 302 connected to each other, a connection surface 303 is provided between the first portion 301 and the second portion 302, the first portion 301 is in sliding contact with the head 201, strip-shaped gaps 3011 extending downward from an opening of the first portion 301 are uniformly distributed on a side wall of the first portion 301, a diameter of the second portion 302 is smaller than that of the first portion 301, and the second portion 302 is embedded in the fixing base 4 and is fixedly connected to the fixing base 4 by a second fastening screw 8. The expansion sleeve 3 is made of 65Mn spring steel, the gap 3011 is arranged to enable the first portion 301 to have an expansion space and to have an outward-opening tension, when the head 201 presses the first portion 301 downwards, the side wall of the first portion 301 can be attached to the head 201 to expand outwards, so that the purpose of expanding the outer diameter of the head is achieved, the lower dynamic balance plate 12 arranged outside the expansion sleeve 3 is tightly attached to the outer wall of the first portion 301, and the positioning effect of the lower dynamic balance plate 12 is achieved.

Further, the head portion 201 has an outer tapered surface 205 with a diameter gradually decreasing from top to bottom, the inner wall of the first portion 301 has an inner tapered surface 304 matching with the outer tapered surface 205, the outer tapered surface 205 fits the inner tapered surface 304, and the outer tapered surface 205 moves down along the inner tapered surface 304 to expand the first portion 301, so as to expand the outer diameter of the first portion 301. The inclination of the outer cone surface 205 and the inner cone surface 304 in the preferred embodiment is preferably 10 °. As shown in fig. 7, in the expanded state of the expansion sleeve 3, the head 201 presses the first portion 301 downward as much as possible, so that the side wall thereof is expanded outward; as shown in fig. 6, in the released state of the expansion shell 3, the head portion 201 is spaced as far as possible from the first portion 301, and the first portion 301 is less compressed.

As shown in fig. 1, the fixing seat 4 is provided with a bottom plate 402, a group of support rods 9 is fixedly arranged at the bottom of the bottom plate 402, the support rods 9 are erected on the driving cylinder 5, and a driving rod 501 of the driving cylinder 5 extends into the fixing seat 4 and is fixedly connected with the inner supporting conical shaft 2. The bottom plate 402 can improve the stability of the fixing base 4 and reduce the possibility of shaking. The outer diameters of the fixing seat 4 and the positioning shaft 1 in the preferred embodiment are the same, and in other possible embodiments, the outer diameter of the fixing seat 4 may also be gradually increased from top to bottom.

Further, a limit screw sleeve 10 is sleeved on the driving rod 501, the limit screw sleeve 10 is located between the bottom plate 402 and the driving cylinder 5, the moving range of the driving rod 501 is limited, and the phenomenon that the driving rod 501 excessively displaces to cause excessive extrusion of an expansion sleeve to damage the lower dynamic balance plate 12 is avoided.

The working principle of the invention is as follows:

firstly, an upper dynamic balance plate 14, a cast aluminum rotor 13 and a lower dynamic balance plate 12 are sequentially sleeved on a positioning shaft 1 from top to bottom;

secondly, moving the lower dynamic balance plate 12 out of the first part 301 of the expansion sleeve 3;

then, starting a driving cylinder 5, pulling an inner support conical shaft 2 downwards, driving a positioning shaft 1 to displace downwards, wherein the first part 301 is extruded and expanded, the outer wall of the first part 301 is abutted to a lower dynamic balance plate 12, so as to fix the position of the lower dynamic balance plate 12, and the upper dynamic balance plate 14 and a cast aluminum rotor 13 are synchronously fixed;

then, inserting the rotor shaft 11 into the accommodating cavity 101 to be connected with the positioning pin 6;

and finally, pressing the rotor shaft 11 downwards, and pressing the rotor shaft 11, the upper dynamic balance plate 14, the cast aluminum rotor 13 and the lower dynamic balance plate 12 into a whole.

The invention is provided with a first positioning mechanism and a second positioning mechanism which are positioned synchronously, a lower dynamic balance plate 12, a cast aluminum rotor 13 and an upper dynamic balance plate 14 are sleeved outside a positioning shaft 1 at the same time, the lower dynamic balance plate 12 is positioned by the second positioning mechanism to fix the positions of the lower dynamic balance plate and the upper dynamic balance plate, the first positioning mechanism positions a rotor shaft 11, so that the rotor shaft 11, the lower dynamic balance plate 12, the cast aluminum rotor 13 and the upper dynamic balance plate 14 are coaxially arranged, press mounting can be carried out at the same time, the press mounting efficiency is greatly improved, the concentricity of the four is ensured to the maximum extent, and the processing precision is improved.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. Motor rotor inflation positioner, its characterized in that: the device comprises a positioning shaft (1), an inner supporting conical shaft (2), an expansion sleeve (3), a fixed seat (4) and a driving cylinder (5) which are coaxially arranged from top to bottom, wherein a positioning pin (6) for positioning is arranged in the positioning shaft (1), and the positioning shaft (1) and the positioning pin (6) form a first positioning mechanism; the expansion sleeve (3) is arranged between the inner support conical shaft (2) and the fixed seat (4) and sleeved on the inner support conical shaft (2), the driving cylinder (5) is connected with the inner support conical shaft (2) and drives the inner support conical shaft (2) to move downwards to extrude the expansion sleeve (3), so that the outer diameter of the expansion sleeve (3) is outwards expanded for positioning, and the inner support conical shaft (2), the expansion sleeve (3) and the driving cylinder (5) form a second positioning mechanism; and the inner support conical shaft (2) is fixedly connected with the positioning shaft (1), so that the first positioning mechanism and the second positioning mechanism are positioned synchronously.

2. The motor rotor expansion positioning apparatus of claim 1, wherein: the top of the positioning shaft (1) is provided with an opening, a hollow accommodating cavity (101) extends from the opening to the interior of the positioning shaft, and the positioning pin (6) is arranged at the axis of the accommodating cavity (101); the bottom of the positioning shaft (1) is provided with an inserted bar (102) extending outwards from the axis of the positioning shaft, and the inserted bar (102) is inserted into the inner support conical shaft (2).

3. The motor rotor expansion positioning apparatus of claim 2, wherein: the containing cavity (101) is T-shaped, an inwards concave part (103) is arranged at the axis of the bottom of the cavity, a convex rod (601) matched with the concave part (103) is arranged at the bottom of the positioning pin (6), the convex rod (601) is inserted into the concave part (103), a spring (15) is arranged between the convex rod (601) and the concave part (103), and two ends of the spring (15) are respectively abutted to the convex rod (601) and the concave part (103).

4. The motor rotor expansion positioning apparatus of claim 2, wherein: interior vaulting pole (2) are the T style of calligraphy, its head (201) with location axle (1) butt, its pole portion (202) set up in the inside of fixing base (4) and with drive actuating cylinder (5) and be connected, the axle center department of head (201) has one from its top downwardly extending's jack (203), inserted bar (102) set firmly in jack (203).

5. The motor rotor expansion positioning device of claim 4, wherein: the bottom of the inserted bar (102) is provided with a first annular groove (104) along the outer wall thereof, the bar part (202) of the inner supporting conical shaft (2) is annularly and uniformly distributed with a group of through holes (204) communicated with the insertion hole (203) along the side wall thereof, and a first fastening screw (7) penetrates through the through holes (204) and is abutted against the first annular groove (104) so as to fasten the positioning shaft (1) and the inner supporting conical shaft (2) together.

6. The motor rotor expansion positioning device of claim 5, wherein: a group of waist-shaped holes (401) are uniformly distributed on the side wall of the fixed seat (4), the waist-shaped holes (401) are vertically arranged, and the length of each waist-shaped hole is not less than the moving distance of the inner support conical shaft (2).

7. The motor rotor expansion positioning device of claim 4, wherein: the expansion sleeve (3) comprises a first portion (301) and a second portion (302) which are connected, a connecting surface (303) is arranged between the first portion (301) and the second portion (302), the first portion (301) is attached to the head (201) in a sliding mode, strip-shaped gaps (3011) extending downwards from openings of the first portion (301) are evenly distributed on the side wall of the first portion, the diameter of the second portion (302) is smaller than that of the first portion (301), and the second portion (302) is embedded in the fixing seat (4) and fixedly connected with the fixing seat (4) through a second fastening screw (8).

8. The motor rotor expansion positioning apparatus of claim 7, wherein: the head (201) is provided with an outer conical surface (205) with the diameter gradually reduced from top to bottom, the inner wall of the first portion (301) is provided with an inner conical surface (304) matched with the outer conical surface (205), the outer conical surface (205) is attached to the inner conical surface (304), and the outer conical surface (205) moves downwards along the inner conical surface (304) to prop open the first portion (301) so as to enlarge the outer diameter of the first portion (301).

9. The motor rotor expansion positioning apparatus of claim 1, wherein: fixing base (4) have on bottom plate (402), the bottom of bottom plate (402) has set firmly a set of bracing piece (9), bracing piece (9) erect drive on actuating cylinder (5), actuating lever (501) that drive actuating cylinder (5) stretch into the inside of fixing base (4) with internal stay conical shaft (2) rigid coupling.

10. The motor rotor expansion positioning apparatus of claim 9, wherein: the driving rod (501) is sleeved with a limiting threaded sleeve (10), the limiting threaded sleeve (10) is located between the bottom plate (402) and the driving cylinder (5), and the moving range of the driving rod (501) is limited.