JP2005240760A - Internal frame of compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internal frame of a compressor equipped with an enhanced preciseness in assembling and enhanced strength while the size of the compressor is minimized. <P>SOLUTION: The internal frame of the compressor includes a frame body provided with a through hole penetrated by a crank shaft, legs extended upon being folded at the ends of the frame body, and a component coupling part extended upon being folded at the legs in such a way parallel with the frame body, wherein the component coupling part is folded inward so that the folded parts face each other, while the frame body is formed so as to allow component fastening to the component coupling part without interference of the frame body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a compressor that compresses a working fluid such as a refrigerant at a predetermined pressure. More specifically, the present invention is installed inside a sealed container that forms the appearance of the compressor, and various components constituting the compressor are mounted. The compressor internal frame.

In general, a compressor is a device that compresses and discharges a working fluid such as gas or refrigerant at a predetermined pressure, and includes a turbo compressor such as an axial compressor or a concentric compressor, and a rotary compressor. And positive displacement compressors such as reciprocating compressors.
Among such compressors, the reciprocating compressor is a device that compresses and discharges gas and refrigerant sucked into the cylinder by reciprocating movement of a piston provided in the cylinder.

FIG. 1 is a diagram showing an internal configuration of a general reciprocating compressor.
Referring to FIG. 1, the internal configuration of the general reciprocating compressor (hereinafter referred to as a compressor) will be described. The compressor accommodates various internal components, and includes an upper container 1a and a lower container 1b. The airtight container 1 configured and the frame 2 supported by a spring 2S inside the airtight container 1 and combined with various internal components constituting the compressor are included.
Here, in the center of the frame 2, a boss having an inner hole penetrating in the vertical direction is formed, and a crankshaft 5 penetrating the inner hole in the vertical direction is rotatably installed in the inner hole. The

  The crankshaft 5 is formed with an oil flow path 5a, and the oil L stored in the lower part of the closed container 1 is guided to the upper part of the closed container via the oil flow path 5a, and the frame 2 Sprayed on top. A pumping device 5d that pumps the oil L to the oil passage 5a is installed at the lower end of the crankshaft 5.

  The crankshaft 5 is rotated by a motor unit, and the motor unit is attached to the crankshaft 5 so as to rotate by electromagnetic interaction between a stator 3 fixed to a lower portion of the frame and the stator 3. And a rotor 4 to be coupled.

  A crank pin 5 b that is eccentric with respect to the rotation center of the crank shaft 5 is installed at the upper end of the crank shaft 5. A counter thrust 5c is provided on the opposite side of the crank pin 5b to keep the rotation speed of the crank shaft 5 constant.

  On the other hand, a cylinder 6 having a compression chamber therein is formed integrally with the frame 2 at one of the upper portions of the closed container. The cylinder has a piston 7 for compressing refrigerant, gas, etc., and the piston 7 is connected to a crankpin 5 b provided at the upper end of the crankshaft 5 by a connecting load 8.

  The cylinder 6 is provided with a valve assembly 9 for controlling the refrigerant flowing into and discharged from the compression chamber. The valve assembly 9 includes a suction valve for sucking refrigerant and a discharge valve for discharging compressed refrigerant.

  The valve assembly 9 is installed between the cylinder 6 and the head cover 10, and one of the head covers 10 is provided with a suction noise machine 11 for reducing the noise of the refrigerant transmitted to the compression chamber, Connected to the valve assembly 9.

  One of the sealed containers is provided with a suction pipe 12 that sucks refrigerant from the outside and guides it to the suction noise machine 11, and the other of the sealed containers is provided with a discharge pipe 13 that discharges compressed refrigerant to the outside. .

  The frame 2 is integrally formed with the boss 2a, the cylinder 6 and the like by casting, but the boss 2a and the cylinder 6 may be separately formed according to design conditions and may be coupled to the frame.

Hereinafter, a general frame structure in which various components constituting the compressor are combined as described above and formed separately from the boss and the cylinder will be described with reference to FIG.
Referring to FIG. 2, the frame is manufactured by pressing or forging a plate material.

  The frame 20 includes a frame upper plate 21 in which a boss insertion hole into which a boss 24 is inserted is formed at the center, a leg 22 that is bent and extended downward at both ends of the frame upper plate 21, and each leg The lower end of the frame 22 includes a stator coupling portion 23 that is bent and extended perpendicularly outward and parallel to the upper plate 21 of the frame. Here, an annular flange 24 a is formed on the upper end of the boss 24 so as to be seated on the periphery of the boss insertion hole.

  Each stator coupling portion 23 is formed with a fastening hole 23a for coupling with the stator 3, and the stator 3 is coupled to the lower surface of the stator coupling portion 23 by a fastening means 3a. The

  However, the general frame having the above structure has the following problems.

First, since the stator coupling portion 23 of the frame 20 is bent and extended to the outside of each leg 16, the entire length L of the frame 20 becomes long, which prevents the compressor from being downsized.
2. Since the entire lower surface of the flange 24a formed at the upper end of the boss 24 is in contact with the peripheral edge of the boss insertion hole, there is a high possibility that the boss and the flange upper plate 21 will not be at right angles. The smooth rotation of the crankshaft inserted and rotated inside the boss 24 is obstructed.
3. Since the bent portions 22a and 22b of the frame are weak in rigidity, damage and deformation are caused by stress concentration.
Fourth, when the frame is deformed, the position between the components coupled to the frame is changed, and the performance of the compressor is deteriorated.

Therefore, an object of the present invention is to provide a compressor internal frame having a structure that minimizes the size of the compressor.
It is another object of the present invention to provide a compressor internal frame that increases the assembly precision of a boss that supports a crankshaft and a frame main body to which the boss is fixed, thereby facilitating the rotation of the crankshaft.
Still another object of the present invention is to provide a compressor internal frame having a configuration that prevents deformation and breakage during driving of the compressor.

  In order to achieve the above object, an internal frame of a compressor according to the present invention includes a frame body in which a through-hole through which a crankshaft is formed, a leg that is bent and extended at both ends of the frame body, and is parallel to the frame body. As described above, each of the legs includes a component coupling portion that is bent and extended, and the component coupling portion is folded inward so as to face each other, and the frame main body is not interfered by the frame main body, and the component coupling portion is It is formed so that components can be fastened.

  The leg is bent to a predetermined width at an intermediate portion between both ends of the frame body, and the component coupling portion is provided on both sides in the width direction of each leg. And the said component coupling | bond part has a fastening hole for component coupling | bonding.

  The frame main body is notched at an upper portion of the fastening hole so that the fastening hole can be seen from above.

  The compressor inner frame further includes a seating portion that is bent outward at each leg and seats on a component that is coupled to the component coupling portion.

  The seating portion includes a stopper that prevents the frame body formed on the outer end thereof from flowing so that components coupled to the component coupling portion do not collide with the inner wall of the hermetic container when the compressor is driven.

  The seating portion is preferably formed so as not to be longer than the frame body on the side where the leg is formed.

  The frame main body includes a boss inserted into the through hole and rotatably supporting the crankshaft.

  The boss includes a flange formed at an upper end thereof so as to be orthogonal to the axial direction of the crankshaft.

  The frame main body further includes a concave groove at a portion where the flange of the boss is seated.

  The boss is fixed by a fixing hole formed in one of the flange of the boss and the groove portion and a fixing protrusion formed in the other and inserted in the fixing hole.

  It is preferable that the fixing protrusion has a round portion formed at a predetermined curvature so as to prevent the fixing protrusion from being damaged or deformed at the bottom thereof.

  Here, it is preferable that the fixed protrusion has a cylindrical shape, and the radius of curvature of the round portion is larger than 0.05 times the diameter of the fixed protrusion.

  A flange support portion having a predetermined width and height is formed with a step on either one of the flange of the boss and the groove portion.

  The flange support portion is formed to have a step with a predetermined width and height at the periphery of the bottom portion of the fixed protrusion.

  When the fixing protrusion is formed, a predetermined pressure is applied to the opposite side of the surface from which the fixing protrusion protrudes, and the opposite side is recessed to a predetermined depth.

  The compressor internal frame further includes at least one strength reinforcing rib at each bent portion where the legs and the component coupling portions are formed.

  The strength reinforcing rib is formed in such a manner that a predetermined pressure is applied to one of the bent portions, one of which receives the pressure is depressed, and the opposite side protrudes.

  The strength reinforcing rib is formed by applying a predetermined pressure to the swollen portion of each bent portion and projecting the opposite side.

  The compressor internal frame and the compressor having the same have the following effects.

  1. The compressor internal frame according to the present invention is formed by bending the component coupling portion inward, so that the volume of the compressor internal frame is reduced, and thus the compressor can be miniaturized.

  Secondly, since the corners of the frame main body are cut so as not to be interfered by the frame main body at the time of connecting the components such as a stator, or by forming a fastening hole in the component connecting portion, In addition, the parts can be easily combined.

  3. At the periphery of the through hole of the frame body, a recessed groove portion is formed on which the flange of the boss is seated, and the vertical length of the internal structure of the compressor is shortened, so that the compressor can be miniaturized. Become.

  4. The lower surface of the frame body is pushed up with a predetermined pressure in order to form the fixed protrusion provided in the concave groove, so that the fixed protrusion is easily formed at a predetermined height.

  5. The compressor internal frame according to the present invention includes a flange support portion that minimizes the contact area between the flange of the boss and the frame body, and the assembly accuracy of the frame body and the boss is improved. .

  6. The compressor internal frame according to the present invention includes a bent portion at the upper and lower ends of the leg and a strength reinforcing rib and a round portion for reinforcing the strength of the bottom of the fixed protrusion, and the frame is deformed or damaged. To prevent.

  Hereinafter, a preferred embodiment of a compressor internal frame according to the present invention will be described in detail with reference to the accompanying drawings.

In the reciprocating compressor provided with the compressor internal frame according to the present invention, the same description as that described below will not be repeated.
Hereinafter, an embodiment of a compressor internal frame according to the present invention will be described with reference to FIGS.
Here, FIGS. 3A, 3B, and 3C are perspective views showing a first embodiment of the compressor inner frame according to the present invention, respectively, and the compressor inner frame from which the boss is separated is expanded. It is the expanded view and top view which show the state.
Referring to FIGS. 3A and 3B, a compressor internal frame 30 that is installed inside the compressor and to which various components constituting the compressor are coupled includes a frame body 31 and both ends of the frame body. A leg 37 and a component coupling part 39.

  The frame main body 31 is formed by processing an iron plate having a predetermined thickness, and the frame main body 31 is formed with a through hole 33 in a vertical direction through which a crankshaft for linearly reciprocating the piston passes. The A boss 40 that rotatably supports the crankshaft is formed in the through hole 33 of the frame body.

  The leg 37 is bent downward at both ends of the frame main body 31 to support the frame main body 31, and more specifically, is bent downward to a predetermined width at an intermediate portion at both ends of the frame main body 31.

  The component coupling portion 39 is a portion to which components such as a stator coupled to the compressor internal frame are fastened, and is bent inward by the respective legs 37 so as to be parallel to the upper surface of the frame body 31. It is extended to face each other. More specifically, the component coupling portion 39 extends inward from both sides in the width direction of each leg 37, and a fastening hole 39a for component coupling is formed in the component coupling portion.

And the corner | angular part of the said frame main body 31 of the upper part part of the said fastening hole is cut | disconnected so that the component joint part 39 in which the fastening hole 39a of the said component joint part is formed can be seen from upper part, and components fastening, such as the said stator It is preferable to prevent the tool from being interfered by the frame body when a tool such as a punch approaches to form a fastening hole in the component joint.
In addition, it is preferable that the compressor inner frame further includes a seating portion 38 that is bent outward at each leg 37 and seats on a component that is coupled to the component coupling portion 39.

The seating portion 38 is formed integrally with the component coupling portion 39, and the upper surface thereof forms the same plane as the upper surface of the component coupling portion 39.
The seating portion 38 is preferably formed so as to be flat with the upper surface of the frame body 31 so as not to be longer than the width of the frame body 31 on the side where the leg 37 is formed.
In addition, the leg portion on the outer end of the seating portion 38 is provided on the outer end of the seating portion 38 so as to prevent components mounted on the compressor inner frame 30 from colliding with the inner wall of the sealed container due to vibration generated when the compressor is driven. It is preferable to form a stopper 38a extending in the outward direction of 37. An unexplained reference numeral 31a is an upper fastening hole, which is formed to couple a configuration such as a cylinder (not shown) fastened to the frame body 31 to the compressor internal frame.

Next, the frame main body 31 in which the through hole 33 is formed and the boss 40 inserted into the through hole will be described with reference to FIGS. 4, 5-A, and 5-B.
Referring to FIG. 4, FIG. 5-A, and FIG. 5-B, the boss 40 has a cylindrical shape with a predetermined length, and has an inner hole 42 that penetrates the center in the axial direction. The crankshaft is rotatably installed in the middle hole 42.

Therefore, it is preferable that the inner peripheral surface of the boss inner hole 42 is smoothly polished.
And, at the upper end of the boss, there is a trust part 43 that rotatably supports the lower surface of the balanced thrust of the crankshaft, and the upper surface of the frame main body, particularly the through hole, orthogonal to the axial direction of the boss inner hole. A flange 41 is formed to be seated on the periphery of the rim.

  The trust part 43 is preferably formed to protrude slightly from the upper surface of the frame body 31. This is to prevent a portion of the crankshaft supported by the trustbo 43 from contacting the flange 41 and the frame body 31.

  A concave groove 34 having a height lower than that of the upper surface of the frame body 31 is formed at the periphery of the through hole 33 where the flange 41 of the boss 40 is seated. In order to fix the boss, a large number of rod-shaped fixing projections 35 project from the concave groove 34, and a plurality of fixing holes 41a into which the fixing projection 35 is inserted into the flange 41 of the boss. Is formed.

  The fixing protrusion 35 can be formed by various methods such as forging and pressing. The lower surface of the frame body 31, that is, the surface opposite to the surface from which the fixed protrusion 35 protrudes, is pressed by the pressure applied in the protruding direction of the fixed protrusion 34 when the fixed protrusion 35 is formed. A concave groove 35a is formed in the lower surface of the recess.

The concave groove 35a is for forming the fixing protrusion 35 more smoothly. More specifically, the pressure applied to form the concave groove 35a presses the lower surface of the frame body 31 to fix the fixing protrusion 35. Help with the formation of.
Since the groove 35a is formed on the lower side of the fixed protrusion 35, the thickness of the bottom of the fixed protrusion 35 is relatively thin, and the strength may be reduced. In order to prevent the fixing protrusion 35 from being damaged due to the weakening of the strength as described above, it is preferable to form a round portion 35 b at the bottom of the fixing protrusion 35.

The round part 35 b serves to reinforce the connecting part between the bottom part of the fixing protrusion 35 and the concave groove part 34. The curvature radius R of the round portion 35b is preferably larger than 0.05 times the diameter D of the fixed protrusion 35. This is because the round portion 35b reinforces the connecting portion between the bottom portion of the fixing protrusion 35 and the concave groove portion 34 to a certain thickness or more.
Of course, the round portion 35b is formed on the bottom surface of the fixing projection 35 in order to prevent the fixing projection 35 from being damaged even when the concave portion 35a for smooth formation of the fixing projection is not formed on the lower surface of the frame body 31. Can be provided.

In the present embodiment, the fixing protrusion 35 is formed in the concave groove 34 on the frame body 31 side, and the fixing hole 41a is formed in the flange 41 of the boss 40. The position with 41a may be formed in reverse.
A flange support portion 34 a having a predetermined width and height is formed around the bottom portion of the fixed protrusion 35 with a step 37 so as to be higher than the bottom surface of the concave groove portion 34. That is, the flange support portion 34a is formed higher than the bottom surface of the concave groove portion 34, and the lower surface of the flange 41 of the boss 40 is seated on the flange support portion 34a.

  As a result, the contact area between the flange 41 and the frame body 31 is minimized, and the center axis of the inner hole 42 of the boss 40 is exactly perpendicular to the upper surface of the frame body 31 and is inserted into the boss 40. Thus, friction generated in the rotating crankshaft is also minimized.

  In the first embodiment of the compressor internal frame according to the present invention, the horizontal cross-sectional shape of the flange support portion 34a has a circular shape, but is not necessarily limited to a circular shape.

  In addition to the above structure, the upper and lower ends of the leg 37, that is, the bent portion connected to the frame body 31 and the bent portion connected to the seating portion 39, have strength reinforcing ribs, respectively. Preferably it is formed. A second embodiment of the present invention in which the strength reinforcing rib is formed will be described.

Referring to FIGS. 6 and 7, the strength reinforcing rib 50 is installed at a bent portion of the compressor internal frame 30 and is formed together when the compressor internal frame is formed.
Here, the direction in which the strength reinforcing rib 50 is formed is preferably the extending direction of the leg 37. That is, the strength reinforcing rib 50 is formed by pressing the upper and lower bent portions of the leg 37 with a punch having a predetermined shape. The punch may be a bar having a polygonal cross section, or a bar, but is not limited thereto.

When pressure is applied to the bent portions of the upper and lower ends of the leg 37 using the punch having the shape as described above, strength reinforcing ribs 50 are formed on the opposite surface on the side subjected to the pressure, and are applied by the punch. A depressed recess 52 is formed on the pressed side.
The strength reinforcing rib 50 formed in this manner prevents the compressor internal frame from being deformed or damaged by vibrations generated when the compressor is driven.

  Hereinafter, the manufacturing process and operation of the compressor internal frame constructed as described above will be described in detail.

The compressor internal frame according to the present invention has a structure in which a boss 40 supporting the crankshaft is manufactured separately from the frame main body 31 and then coupled to the frame main body 31.
The compressor inner frame 30 is formed by pressing or forging a plate material such as an iron plate. An example of the compressor inner frame manufacturing process will be described below.

  First, a plate material cut to a predetermined length or width is cut into a shape as shown in FIG. And the cut | disconnected board | plate material is bend | folded and it is made into the shape which has the said leg 37, the component coupling | bond part 39, and the seating part 38, as shown to FIG. 3-A. Of course, the cutting process of the plate material and the bending process may be performed simultaneously.

Next, processing such as punching holes such as the fastening holes 31 a and 39 a in the corners of the frame 30 to form the strength reinforcing ribs 50 may be performed.
Here, the steps such as cutting, bending, and punching can be performed simultaneously or separately in a different order, but are performed on the surface of the compressor internal frame 30 like punching of the fastening holes. It is preferable to proceed after completion of the shape of the compressor internal frame 30.

And in order to form the fastening hole 39a for fastening with the stator on the surface of the component coupling part 39, the tool for forming the fastening hole 39a is subject to the interference of the frame body 31. should not. For this purpose, the corners of the frame body 31 according to the present invention are cut and removed so that the component coupling part 39 can be seen from above.
The frame body thus formed is coupled to the boss 40 having the flange 41 by the fixing hole 41 a and the fixing protrusion 35.

The compressor inner frame 30 manufactured as described above is installed inside a sealed container and is combined with various parts constituting the compressor. The components mounted on the compressor internal frame 30 include a cylinder in which a piston is built, a stator, and a crankshaft.
That is, the cylinder is fastened to the upper surface of the frame body 31, the stator is fastened to the component coupling portion 39, and the crankshaft is installed through the boss 40. As described above, the compressor has a function of compressing a low-pressure refrigerant and discharging it to a high-pressure refrigerant by pressing and fixing a rotor that electromagnetically interacts with the stator to the crankshaft. Do.

  Although several preferred embodiments have been described above, the present invention can be embodied in various other forms without departing from the spirit and scope thereof, so that the relevant technology has ordinary knowledge. Will be clear.

  Therefore, the present invention is not limited to the above-described embodiments, and it can be understood that all the embodiments within the scope of the claims and their equivalents belong to the scope of the present invention.

It is sectional drawing which shows the structure of a general reciprocating compressor. It is sectional drawing which shows the internal flame | frame provided for the compressor of FIG. 1 is a perspective view showing a first embodiment of a compressor internal frame according to the present invention. It is an expanded view which shows 1st Embodiment of the compressor internal flame | frame by this invention. It is a top view which shows 1st Embodiment of the compressor internal flame | frame by this invention. It is sectional drawing which shows the frame main body of 1st Embodiment of the said compressor internal flame | frame. It is sectional drawing which shows the fixed protrusion of 1st Embodiment of the said compressor internal flame | frame. It is a top view which shows the fixed protrusion of 1st Embodiment of a compressor internal frame. It is a perspective view which shows 2nd Embodiment of the compressor internal flame | frame by this invention. It is sectional drawing which cuts and shows a bending part along the AA of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 ... Frame 31 ... Frame main body 33 ... Through-hole 35 ... Fixed protrusion 37 ... Leg 38 ... Seating part 39 ... Component coupling | bond part 40 ... Boss 50 ... Strengthening rib

Claims (19)

A frame body in which a through-hole through which a crankshaft is formed, a leg that is bent and extended at both ends of the frame body, and a component coupling portion that is bent and extended at each leg so as to be parallel to the frame body; Including
The compressor internal frame is formed such that the component coupling portions are bent inward so as to face each other, and the frame main body is formed so that components can be fastened to the component coupling portion without interference by the frame main body.   2. The compressor according to claim 1, wherein the leg is bent to a predetermined width at an intermediate portion between both ends of the frame main body, and the component coupling portion is provided on both sides of each leg in the width direction. Internal frame. The component coupling part is
3. The compressor internal frame according to claim 2, wherein a fastening hole for connecting parts is formed. The frame body is
The compressor internal frame according to claim 3, wherein an upper portion of the fastening hole is cut out so that the fastening hole can be seen from above.   The compressor internal frame according to claim 1, further comprising a seating portion that is bent outward at each leg and seats on a component that is coupled to the component coupling portion. The seating portion is
A stopper for preventing a flow of the frame body formed at an outer end of the frame is provided so that a component coupled to the component coupling portion does not collide with an inner wall of a sealed container when the compressor is driven. 5. The compressor internal frame according to 5. The seating portion is
6. The compressor internal frame according to claim 5, wherein the frame is formed so as not to be longer than a frame body on a side where the leg is formed. The frame body is
The compressor internal frame according to claim 1, further comprising a boss inserted into the through hole and rotatably supporting the crankshaft. The boss
9. The compressor internal frame according to claim 8, further comprising a flange formed at an upper end thereof so as to be orthogonal to the axial direction of the crankshaft. The frame body is
The compressor internal frame according to claim 9, further comprising a concave groove at a portion where the flange of the boss is seated. The boss
The fixed hole formed in any one of the flange of the said boss | hub and the said recessed groove part, and the fixed protrusion formed in the other and being inserted in the said fixed hole, The fixed of Claim 10 characterized by the above-mentioned. Compressor internal frame. The fixing protrusion is
The compressor internal frame according to claim 11, further comprising a round portion formed in a curvature so as to prevent the fixing protrusion from being damaged or deformed at a bottom portion thereof.   The compressor internal frame according to claim 12, wherein the fixed protrusion has a cylindrical shape, and a radius of curvature of the round portion is larger than 0.05 times a diameter of the fixed protrusion.   11. The compressor internal frame according to claim 10, wherein a flange support portion having a predetermined width and height is formed on one of the flange of the boss and the concave groove portion. .   12. The compressor internal frame according to claim 11, wherein a flange support portion having a predetermined width and height is formed on the peripheral edge of the bottom portion of the fixed projection with a step.   The compressor internal frame according to claim 11, wherein, when the fixing protrusion is formed, a predetermined pressure is applied to an opposite side surface of the surface from which the fixing protrusion protrudes, and the opposite side surface is recessed to a predetermined depth.   The compressor internal frame according to claim 1, further comprising at least one strength reinforcing rib at each bent portion where the legs and the component coupling portions are formed. The strength reinforcing rib is:
18. The compressor internal frame according to claim 17, wherein a predetermined pressure is applied to one of the bent portions, and the one receiving the pressure is depressed and the opposite side protrudes. The strength reinforcing rib is:
19. The compressor internal frame according to claim 18, wherein a predetermined pressure is applied to the swollen portion of each bent portion and the opposite side protrudes.

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