JPH0658178U - Compressor - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a compressor that does not require fastening of bolts and can effectively utilize the internal space. [Composition] A front cylinder head 11, a front housing 1, and a rear housing 2 of a compressor, which are joined to each other.
Further, the protrusions 31 to 36 are provided on the outer circumferences of the respective joints of the rear cylinder head, and the protrusions 31 to 36 are fastened by the fastening member 38 from the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a compressor, and more particularly to a fastening structure for a casing or a housing of a compressor for refrigeration and air conditioning.

[0002]

[Prior art]

 Conventionally, as a compressor for a refrigeration circuit, a double swash plate type compressor, a swash plate type compressor, a scroll type compressor, a vane rotary type compressor and the like are known. These compressors include at least two casings or housings forming a main body, and a compression mechanism portion arranged inside them. The fastening between these casings and housings is done by bolts.

FIG. 11 is a sectional view showing a conventional swash plate type compressor. As shown in FIG. 11, the front housing 101 and the rear housing 102 each have a crank chamber 103 provided therein, and a swash plate 108 connected to a drive shaft 104 is disposed in the crank chamber 103. Around the crank chamber 103 inside the front housing 101 and the rear housing 102, a cylinder bore 105 is provided in parallel with the drive shaft 104 so as to surround the drive shaft 104, and a piston 106 slides in each of the cylinder bores 105. It is arranged as possible. In the groove 107 provided in the piston 106, the peripheral edge of the swash plate 108 is accommodated together with the shoes 109 provided on both end surfaces.

Both end faces of the center of the swash plate 108 are slidably supported by sleeve members 118 and 119 via thrust bearings 116 and 117.

A front cylinder head 113 is joined to the opening end of the front housing 101 via a valve plate device 112, and a rear cylinder head 115 is connected to the opening end of the rear housing 102 via a valve plate device 114. Abut.

In such a compressor, the front housing 101, the front cylinder head 113, the rear cylinder head 115, and the rear housing 114 are fastened with bolts 120.

[0007]

[Problems to be solved by the device]

 However, in the conventional compressor, when fastening with bolts, a space for the bolts was required, which was a constraint on the design. In particular, it was an extremely important issue in terms of compact design and improving the capacity by securing space for the suction and discharge chambers.

Therefore, the technical problem of the present invention is to provide a compressor that does not require fastening of bolts and can effectively utilize the internal space.

[0009]

[Means for Solving the Problems]

 According to the present invention, in a compressor having at least two housing parts joined to each other, a protrusion is provided on the outer periphery of each joint of the housing, and the protrusion is fastened from the outside by a fastening member. A compressor characterized by the above is obtained.

Further, according to the present invention, in the compressor, the fastening member has a C-shape, and the projecting ridge portions abutting each other are sandwiched at positions where the outer periphery of the ridge portion is equally divided. A compressor is provided which is characterized in that

Also, according to the present invention, in the compressor, the fastening member is provided along an outer circumference of the ridge portion.

Further, according to the present invention, in the compressor, the fastening member extends between at least two sets of butted ridges, and two ridges at both axial ends of these ridges. A compressor is obtained which is characterized by being sandwiched between.

[0013]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a swash plate type compressor according to an embodiment of the present invention.

As shown in FIG. 1, a front housing 1 and a rear housing 2 are butted against each other with a seal member 3 interposed. The front housing 1 integrally has a front cylinder block 4. The front cylinder block 4 is formed with a plurality of front cylinders parallel to the main shaft 20. These cylinders 5 are formed at equal intervals so as to surround the main shaft 20 via a sleeve 71.

On the other hand, the rear housing member 2 integrally has a rear cylinder block 6. The rear cylinder block 6 has a plurality of rear cylinders 7 parallel to the main shaft 20. These cylinders 7 are formed at equal intervals so as to face the cylinder 5 on the front side and surround the main shaft 20 via a sleeve 72.

A front cylinder head 11 is attached to the front surface of the front housing 1 with a front valve plate device 10 interposed therebetween. A suction chamber 13 and a discharge chamber 12 are defined in the front cylinder head 11.

On the other hand, on the rear surface of the rear housing member 11, a rear cylinder head 15 is provided via a rear valve plate device 14. The rear cylinder head 15 is provided with a suction chamber 17 and a discharge chamber 16. The front housing 1, the rear housing 2, the front cylinder head 11, and the rear cylinder head 15 form the outer shell of the entire housing member 18.

The main shaft 20 has a front small diameter portion 21, a large diameter portion 22, and a rear small diameter portion 23. The front small diameter portion 21 is rotatably supported by a radial needle bearing 24 provided in the front cylinder.

Around the large-diameter portion 22 of the main shaft 20, there is provided a swash plate 8 that is inclined at a predetermined angle with respect to the main shaft 20. Both end surfaces of the central portion 8a around the axis of the swash plate 8 are orthogonal to the axis and are in contact with the thrust bearings 30 and 83, respectively. These thrust needle bearings are supported via sleeves 71 and 72.

The double-headed piston 50 has one end slidably inserted into the front cylinder 5 and the other end slidably inserted into the rear cylinder 7. A concave portion 51 having a curved surface corresponding to a spherical surface is formed at the center of the double-headed piston 50. Two shoes 52, 53 having a spherical surface are provided in the recess 51. A peripheral portion of the swash plate 8 is slidably inserted between the shoes 52 and 53. Therefore, when the swash plate 8 rotates together with the main shaft 20, the double-headed piston 50 reciprocates in the axial direction by an amount corresponding to the tilt angle of the swash plate 42 to perform a compression operation.

Up to the above, the configuration is similar to that of the conventional example.

The swash plate type compressor according to the first embodiment of the present invention has a front housing 1, a front cylinder head 11, a rear cylinder housing 2 and a rear cylinder head 15, which are connected to each other around a joint which is an open end thereof. This is different from the conventional example in that ridges 31 to 36 facing each other are provided, and the ridges 31 to 36 are configured to be fastened by a fastening member 38.

FIG. 2 is a perspective view showing the external appearance of the compressor shown in FIG. As shown in FIG. 2, the opening ends of the front cylinder head 11, the front housing 1, the rear housing 2, and the rear cylinder head 15 are pressed against each other and protrude outwardly around the opening ends. The ridges 31 to 36 formed integrally with the ends are provided along the outer circumference of each opening end. The respective open ends and the protrusions 31 to 36 form the same joint surface. A plurality of fastening members 38 each having a substantially C-shaped cross section are sandwiched between the sides of the protrusions 31 to 36 facing the joint surface. The fastening member 38 is made of a material having elasticity and high strength. The fastening members 38 are provided at the circumferentially equally spaced positions for each of the ridges joined together.

FIG. 3 is a partial vertical cross-sectional view showing a modified example of the compressor shown in FIGS. 1 and 2. Further, FIG. 4 is an enlarged view of a portion indicated by A in FIG. With reference to FIG. 3 and FIG. 4, either the open end having the protruding portion 34 of the rear housing 2 or the joint surface 34a, 36a of the open end having the protruding portion 36 of the rear cylinder head 15 joined thereto. On one side, a groove 39 having a square cross section is formed along the circumference, and the seal ring 3 is arranged in the groove 39. Further, a groove 41 for preventing slipping out is formed on the surface of the protruding portion 34 facing the joining surface 34a. Similarly, a similar retaining groove 41 is formed on the surface of the protrusion 36 facing the joining surface 36a. Both ends of a C-shaped fastening member 38 (see FIG. 3) are inserted into the groove 41. Since the fastening member 38 is made of a material having elasticity and high strength, the respective joint surfaces 34a, 36a and the like are crimped.

FIG. 5 is a front view showing the outer appearance of the compressor according to the second embodiment of the present invention.

As shown in FIG. 5, the compressor according to the second embodiment has a ridge around the open end of each housing as in the first embodiment, The difference is that fastening members 43 having a substantially C-shaped cross section are provided so as to cover the ridges and extend in a ring shape along the periphery of the ridges. The ring-shaped fastening member 43 has a cut at one location in the circumferential direction. This fastening member 43 is also made of a material that has elasticity and strength as well as the fastening member 38 described above.

FIG. 6 shows a joint portion 44 between the rear housing 2 and the rear cylinder head 15 from which the fastening member 43 of the compressor shown in FIG. 5 is removed.

As shown in FIG. 6, the retaining portions 41 ′ of the ridges 34 ′ and 36 ′ of the compressor according to the second embodiment have an inverted triangular cross section in which the outside is wide and the inside is narrow. It is formed to have a face.

FIG. 7 is a partially cutaway sectional view showing the external appearance of the fastening member 43 of FIG. A groove 45 is formed inwardly in a substantially circular shape along the ridges 31 to 36 of the housing.

FIG. 8 is an enlarged cross-sectional view of the ring-shaped fastening member of FIG.

As shown in FIG. 8, as it moves inward from both sides of the peripheral surface 46 of the fastening member 43, the distance becomes gradually narrower, and the tips 47, 48 are bent so as to face each other.

FIG. 9 is a diagram showing a compressor according to a third embodiment of the present invention.

As shown in FIG. 9, the joint between the front housing 1 ′ and the rear housing 2 ′ is joined without a ridge, and the front cylinder head 11 and the front housing 1 ′ and the rear housing are joined together. Between the 2'and the rear cylinder head 15, ridges 35 and 32 and ridges 34 and 36 are formed, respectively.

A plurality of fastening members 60 extending parallel to the main shaft are provided at intervals in the circumferential direction between the ridges of the front cylinder head 11 and the rear cylinder head 15. The fastening member 60 also has elasticity and is made of a material having high strength.

FIG. 10 is a vertical sectional view showing the shape of the fastening member 60. As shown in FIG. 10, both ends 63 of the fastening member main body 61 are bent and extend obliquely so that the intervals between them are gradually narrowed in the same direction, and the tips 64 and 65 are further bent in opposite directions. have. These tips 64 and 65 are hooked on the ridges 35 and 36 at both ends in the axial direction. As a result, due to the elastic force of the fastening member 60, the opening ends of the casings or housings are pressed against each other, and also fastened together with a sealing effect.

[0037]

[Effect of device]

 As described above, according to the present invention, the elimination of the bolts eliminates the need for bolt passages, for example, bolt holes and female threads, which allows effective use of space and a compact design.

Further, according to the present invention, the space of the discharge / suction chamber is widened, so that the capacity can be improved and the pulsation can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a swash plate type compressor according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of the compressor shown in FIG.

FIG. 3 is a partial vertical cross-sectional view showing a modified example of the compressor shown in FIGS. 1 and 2.

FIG. 4 is an enlarged view of a portion indicated by A in FIG.

FIG. 5 is a front view showing the outer appearance of a compressor according to a second embodiment of the present invention.

FIG. 6 is a view showing a joint between a rear housing and a rear cylinder head from which a fastening member of the compressor shown in FIG. 5 is removed.

FIG. 7 is a partially cutaway sectional view showing the outer appearance of the fastening member of FIG.

8 is an enlarged cross-sectional view of the ring-shaped fastening member of FIG.

FIG. 9 is a diagram showing a compressor according to a third embodiment of the present invention.

10 is a cross-sectional view showing the shape of the fastening member of FIG.

FIG. 11 is a sectional view showing a swash plate compressor according to a conventional example.

[Explanation of symbols]

 1, 1'Front housing 2, 2'Rear housing 11 Front cylinder head 15 Rear cylinder head 31, 34 ', 36, 36' Protrusions 34a, 36a Joint surface 38 Fastening member 39, 41 groove 43 Fastening member 45 groove 46 Peripheral surface 47,48 Tip part 60 Fastening member 61 Fastening member main body 63 Both ends 64,65 Tip

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideharu Hatakeyama, 20, Kotobukicho, Isesaki City, Gunma Sanden Co., Ltd. (72) Keiji Shimizu, 20, Kotobukicho, Isesaki City, Gunma Sanden Co., Ltd.

Claims (4)

[Scope of utility model registration request] 1. A compressor having at least two housings which are joined to each other, wherein a protrusion is provided on the outer periphery of each joint of the housing, and the protrusion is fastened from the outside by a fastening member. And a compressor. 2. The compressor according to claim 1, wherein the fastening member has a C shape and is provided at positions where the outer periphery of the ridge portion is equally divided by sandwiching the ridge portions abutting each other. A compressor characterized by being provided. 3. The compressor according to claim 1, wherein the fastening member is provided along an outer circumference of the ridge portion. 4. The compressor according to claim 1, wherein the fastening member extends between at least two sets of butted ridges and sandwiches two ridges at both axial ends of the ridges. A compressor characterized by comprising: