JPH02299455A - Linear motor - Google Patents

Abstract

PURPOSE:To prevent flexure by fixing a plurality of reinforcing ribs between core holders in the shape of a ladder, holding such a space as it does not the ribs into contact with the rear of a core and, at the same time, fixing the rear of the core and the sides of the reinforcing ribs to each other with core bearing materials. CONSTITUTION:Two core holders 10 are welded and fixed to each other with mounting holders 18 and reinforcing ribs 20 extending between them to form a frame 22 together as a unit. At that time, a space is so held that the reinforcing ribs 20 don't come into contact with the rear 8e of a core body 8. After that, the ends 26a of core bearing materials 26 having L shaped sections on the rear 8e of the core body 8 are so closely fixed that they overlap the wall surfaces 20a of the reinforcing ribs 20. In addition, after the lower ends of the core bearing materials 26 are welded with the rear 8e of the core body 8 to fix, the core bearing materials 26 and the reinforcing ribs 20 are welded to fix.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a near motor, particularly a linear motor for a vehicle, in which a frame is reinforced with an iron core supporting material to eliminate its deflection.

(Prior Art) In recent years, in electric vehicles, instead of conventional main electric motors and drive devices, means for directly propelling and traveling the vehicle using a linear motor are being used. This kind of rim (
LIM) Toren is poised to become an optimal and practical system for urban transportation in the future.

As shown in FIGS. 10 to 12, this kind of linear motor is constructed by first installing a rail 1 on the ground 2, and then running a vehicle body 4 supported by wheels 3 on the rail 1. ing. A linear motor 5 is attached below the vehicle body 4, and the linear motor 5 and a secondary conductor 7 made of an aluminum plate or the like are arranged to face each other with a gap 6 interposed therebetween. Note that this secondary conductor 7 is laid in parallel to the rail 1. The secondary conductor 7 generates a thrust between the secondary conductor 7 and the linear motor 5 when the primary side is closed, and drives and runs the vehicle body 4 along the rail 1.

The linear motor 5 includes an iron core body 8, and both sides of the iron core body 8 are sandwiched between tampons 9 to form an iron core. Further, both sides of the core are clamped and fixed with core holders 10 that serve as a frame for the linear motor 5. Coil covers 11 each having a U-shaped cross section are arranged on the outside of the core retainer 10, and the folded legs 11a and tightening bolts 12
The coil cover 11 is fixed in place, and the other leg portion 11b of the coil cover 11 is fixed to the lower end portion of the tampon 9 with a tightening bolt 13. In addition, this tampan 9 is the iron core body 8.
The head of the tightening bolt 13 is configured to not protrude below the lower end surface of the core body 8.

As shown in FIG. 111, the core body 8 and the tampan 9 are
Each of them is made up of a plurality of laminated electric iron plates 8a and 9a. A plurality of slots (not shown) are cut into the lower sides of the electric iron plates 8a, 9a, so that the lower sides of the electric iron plates 8a, 9a are formed into a comb-teeth shape. By forming this comb-teeth shape, a coil storage groove (shown) is formed in the lower side of the laminated core body 8 and tampan 9 that communicate with each other in the longitudinal direction, and the coil 14 is stored therein. , and are fixed by wedges 15.

(Problems to be Solved by the Invention) In the rim train, the dimensions of the gap 6 between the linear motor 5 and the secondary conductor 7 must be maintained and managed within a determined range. Therefore, in order to prevent the dimensions of the gap 6 from changing during operation of the vehicle, as shown in FIG. Directly attach 17 to stand 18
It is installed on. Further, the propulsive force generated from the linear motor 5 is transmitted to the vehicle body 4 by a traction rod 19 that is pivotally supported by the core presser 10.

However, in such a near motor 5, the axle 1
Since this is a single-sided linear motor supported between linear motors 5 and 7, a large suction force f is applied to the linear motors 5 and 2 when the vehicle is running.
This acts between the secondary conductor 7 and the core main body 8 and the core holder 10 to undergo a large deflection at their central portions in the longitudinal direction, as shown in FIG. Therefore, in order to minimize the dimensional change of the gap 6, the core body 8 and the core holder 10 are
It is necessary to have a strong structure that reduces deflection.

Further, when used in a low-floor vehicle, the height dimension of the linear motor 5 is limited, and furthermore, the weight is significantly limited in order to reduce the unsprung weight.

Therefore, in order to solve these problems, in the conventional linear motor, as shown in FIG. The main body 8 is fixed by welding while maintaining a gap G that is large enough not to come into contact with the back surface 8c of the main body 8. and,
After appropriately removing welding distortion, machining is performed on the required parts such as the mounting base 18 shown in FIG. It was devised that the rigidity of the entire frame could be improved by welding and fixing it between the frame and the frame 20 (points indicated by W).

However, even in this method, as shown in FIG. 14, a mutual tensile force is generated in the gap formed between the reinforcing rib 20 and the core body 8 due to heat shrinkage due to welding, and the core body 8 is Deflection occurs due to strain. Therefore, the laminated electric iron plates 8a move slightly by a certain amount, and the surface of the iron core gap surface 8b becomes uneven, and as a result, 2
A problem arises in that the dimension of the gap 6 with the secondary conductor 7 changes, making it impossible to obtain the specified performance as a linear motor.
It was extremely difficult to realize the above-mentioned fixing method by welding.

The present invention has been made in view of the above points, and includes a frame in which reinforcing ribs are provided in a ladder shape between the core holders, and the back surface of the core and the vertical surface of the reinforcing ribs are connected using, for example, a prismatic core support material. The object of the present invention is to provide a linear motor for a vehicle that is welded and fixed to prevent deflection.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, an iron core formed by clamping both end faces of the laminated electric iron plates of the present invention with iron core holders and fastening them with fastening members is provided. In a motor, a plurality of reinforcing ribs are fixed in a ladder shape, spanning between the core holders and maintaining a gap that does not touch the back surface of the core, and further connecting the back surface of the core to the side surface of the reinforcing ribs. They are fixed together by core supports.

(Function) In the linear motor of the present invention configured as described above, the core body and the core holder are not only fastened and fixed by the fastening member, but also connected and integrated by the reinforcing ribs fixed in the shape of a ladder and the core support material. Therefore, the rigidity in the direction of the attractive force generated between the linear motor and the secondary conductor is improved, and the deflection occurring in the longitudinal direction of the linear motor is reduced.

(Example) Examples of the linear motor of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the linear motor 5 and the secondary conductor 7 are arranged to face each other with a gap 6 interposed therebetween. The linear motor 5 includes an iron core body 8,
Both sides of the iron core body 8 are sandwiched between tampons 9 to form an iron core. Further, both sides of the core are clamped and fixed with core holders 10 that serve as the frame of the linear train 5. A coil cover 11 having a U-shaped cross section is disposed on the outside of the core holder 10, and the coil cover 11 is fixed to the core holder 10 with the folded legs 11a and tightening bolts 12. The other leg 11b is fixed to the lower end of the tampan 9 with another tightening bolt 13. Also,
The tamp 9 is formed to have a dimension shorter than the height of the core body 8, and is configured so that the head of the tightening bolt 13 does not protrude below the lower end surface of the core body 8.

As shown in FIG. 2, a plurality of comb-shaped slots 8c are cut into each electrical iron plate 8a constituting the core body 8 on the side of the secondary conductor 7, and furthermore, a plurality of comb-shaped slots 8c are cut on the side opposite to the gap 6. A plurality of through holes 8d are formed in the surface. As shown in FIG. 3, the core holder 10 has a rectangular strip shape with approximately the same length as the core body 8, and connects through holes 10a with the same pitch as the through holes 8d formed in the electrical iron plate 8a to one of the cores. The presser foot 10 also has a through hole 1 with a concave counterbore 10c.
0b is formed on the other core presser 10. These two core holders 10 are welded and fixed to each other by a mounting base 18 and a reinforcing rib 20 that span between them, and constitute an integral frame 22.

At this time, the reinforcing rib 20 is fixed with a gap maintained so as not to come into contact with the back surface 8e of the core body 8.

To fix the core body 8 and the frame 22, use the tampon 9.
are arranged at both ends of the core body 8 and the electric iron plate 8a is laminated between the core holders 10. Then, the stud 23 whose both ends are threaded is inserted into the through hole 8d, and then the counterbore 1'
A nut 24 is inserted into the through hole 10b provided with Oc and screwed into the threaded portion, thereby fixing one end of the stud 23. Further, a circular spacer 25 having a through hole 25a in the center as shown in FIG. 5 is inserted into the other through hole 10b.

The thickness of the spacer 25 is smaller than the thickness T of the core holder 10, and the outer diameter of the spacer 25 is smaller than the hole diameter D' of the through hole 10b of the core holder 10. Next, one end of the stud 23 is inserted into the through hole 25a of the spacer 25, and the nut 24 is screwed onto the threaded portion of the stud 23. After tightening, the portion defined by the spacer 25, the nut 24, and the through hole 10a is As shown in FIG. 6, the core body 8 and the frame 22 are fixed to each other by welding (indicated by W) to integrate the core body 8 and the frame 22. Then, annealing is performed to remove distortion, and the mounting surface is machined.

Next, as shown in FIG. 2, the back part 8e of the core body 8 is
Then, the end surface 26a of the core support member 26 having an L-shaped cross section is brought into close contact with the wall surface 20a of the reinforcing rib 20 so as to overlap with the wall surface 20a. Furthermore, the lower end surface of the core support member 26 is attached to the back surface 8e of the core body 8.
After welding and fixing, the core support material 26 and the reinforcing rib 22
and are fixed by welding. As a result, the core body 8 and the frame 22 are firmly fixed by the studs 23 and the core support members 26.

Furthermore, the coil 14 is housed in the slot 8C of the core body 8, and is fixed to the core body 8 from the lower surface with a wedge 15. Finally, the folded legs 10 of the U-shaped coil cover 11
A is fixed to the core holder 10 with a tightening bolt 12, and the other leg 11b is fixed to the lower end of the tampan 9 with a tightening bolt 13. This completes the assembly of the linear motor 5 main body.

As another embodiment of the core support 26, a simple square column can be used as the core support 26a, as shown in FIGS. 7 and 8. This is used when the core support member 26a does not require much rigidity. This facilitates its manufacture.

Further, as shown in FIG. 9, an iron core support member 26b having an inverted T-shaped cross section can be used.

This increases the section modulus and improves the rigidity of the entire frame.

〔Effect of the invention〕

According to the present invention, the rigidity of the frame of the linear motor in the direction of the attraction force generated between the linear motor and the secondary conductor is greatly improved, and the deflection in the longitudinal direction of the frame is greatly reduced by 1↑
decreases to 1. In addition, since the back side of the core body and the side surfaces of the reinforcing ribs are fixed by the core support material, heat shrinkage due to the gap between the top and bottom does not occur, and the gap surface of the core is free from tli6.
is prevented.

Furthermore, it is possible to increase the rigidity of the frame and reduce the amount of deflection without increasing the weight of the frame.As a result, the weight of the linear motor can be reduced, and the height of the linear motor can be limited as much as possible, making it suitable for low-floor vehicles. An optimal near motor can be obtained. Furthermore, the increased rigidity of the frame allows it to withstand vibrations during driving, which has the remarkable effect of making it adaptable to high acceleration and high speeds of vehicles using linear motors (rim trains).

[Brief explanation of drawings]

Fig. 1 is a front sectional view of the linear linear motor of the present invention, Fig. 2 is a partial sectional view taken along arrows -■ in Fig. 1, Fig. 3 is a side view of the frame of the linear linear motor of the invention, and Fig. 4 is a partial sectional view of the linear linear motor of the present invention. Fig. 5 is a perspective view of a spacer used in the linear motor of the present invention, Fig. 6 is a partially enlarged sectional view of section A in Fig. 1, and Fig. 7 is a top view of the frame seen from the direction of the A partial cross-sectional view of another embodiment of the invention, FIG. 8 is a partial cross-sectional view taken along the arrow ■-■ in FIG.
FIG. 9 is a partial sectional view of still another embodiment of the present invention, the first
Fig. 0 is a front sectional view of a vehicle equipped with a conventional linear motor, Fig. 11 is a perspective view of the linear motor shown in Fig. 10, Fig. 12 is a side view seen from the direction of the X arrow in Fig.
The figure is a partial sectional view of the frame of a conventional linear motor.
FIG. 4 is a side view showing the bent state of the core body. 5... Linear motor, 7... Secondary conductor, 8... Core body, 10... Core holder, 20... Reinforcement rib, 2
2... Stud, 26... Iron core support material. Applicant's agent Yu Sato 1 Figure 2 Figure 5 Figure 6 Figure 9/S 10 Figure 12

Claims (1)

[Claims] In a linear motor having an iron core formed by sandwiching both end faces of laminated electric iron plates with iron core holders and fastening and fixing them with a fastening member, the linear motor straddles between the iron core holders, and
A linear motor in which a plurality of reinforcing ribs are fixed in a ladder shape while maintaining a gap that does not touch the back surface of the core, and the back surface of the core and the side surface of the reinforcing ribs are fixed to each other by a core support. .