JPH01218916A - Compressor mounting mechanism for vehicle air conditioner - Google Patents

Abstract

PURPOSE:To prevent noise, deformation and resonance by mounting a bush, which interposes inner and outer cylinders and a linear ball bearing between these inner and outer cylinders, to be interposed in one of the compressor mounting part and the mount mounting bolt through hole so as to insert a mounting bolt into the bush. CONSTITUTION:A bush 30 is mounted to a through hole 25 in a mounting part 23 of a compressor 3, and a bolt 5 is inserted into a mount bracket 1 in its through hole 21 and into the bush 30 in its inner cylinder 32, fixing the compressor. Here the bush 30 is constituted of the inner cylinder 32, outer cylinder 41, linear ball bearing 34, ring-shaped elastic member 35 and a washer 37. In this constitution, the compressor absorbs its axial direction vibrating component by the elastic member while the vibration effectively by rolling movement of a ball of a linear ball bearing, further the compressor enables its axial deformation to be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compressor mounting mechanism for mounting a compressor of a vehicle air conditioner to an object to be mounted on a vehicle.

[Prior Art] Conventionally, as shown in FIG. 4, a compressor 3 is screwed and fixed to an object to be mounted, such as a mount bracket 1, using a plurality of hexagonal bolts 5, hexagonal nuts 7, and washers 9. Compressor mounting mechanisms for air conditioners are known.

In addition, as shown in FIG. 5, another conventional example includes an outer cylinder 11 that can slide in a low-friction state, an inner cylinder i3 having rigidity, and elastic bodies 15 arranged on both sides of the inner cylinder 13. Compressor installation tll consisting of bushes 17 provided concentrically with each other! There is a side. In that case, this bush 17
Attach to compressor 3, compressor 3 and mounting bracket 1
are screwed and fixed with a hexagonal bolt 5 and a hexagonal nut 7 via a washer 9.

[Problems to be Solved by the Invention] However, in the compressor mounting mechanism of the vehicle air conditioner shown in FIG. Because it was connected in , it was compressed! ! 43 operates, this pressure mtJ! There was a problem in that the mechanical vibrations of No. 13, especially the vibrations in the axial direction, were directly transmitted to the engine (not shown) via the mount bracket 1, causing unpleasant noise inside the vehicle.

Further, in the compressor mounting mechanism of the vehicle air conditioner shown in FIG. 6, the outer cylinder 11 and the inner cylinder 13 are slidable with low friction. However, since a rubber material is used as the elastic body 15 to make solid contact, the frictional force that acts is large.
The problem was that it did not function properly.

Therefore, an object of the present invention is to effectively reduce the transmission of the mechanical vibrations of the compressor to the engine, thereby preventing unpleasant noise from occurring inside the vehicle, and at the same time providing It is an object of the present invention to provide a compressor mounting mechanism for a vehicle air conditioner which prevents deformation in the direction and prevents resonance of the compressor due to vibration in a direction perpendicular to the axis of the engine.

[Means for Solving the Problems] According to the present invention, a first through hole is provided in the attachment part of the compressor so as to penetrate in the same direction as the axis of the compressor, and the first through hole is In the compressor installation a'ls of a vehicle air conditioner, a second through hole is provided in the object to be installed so as to be coaxial, and bolts are inserted into the first and second through holes and screwed with nuts. , a bushing is provided in at least one of the gap between the first through hole and the bolt, or the gap between the second through hole and the bolt, and the bushing has a rigid interior provided concentrically with each other. The linear ball bearing includes an outer cylinder and balls disposed inside the outer cylinder, and an elastic body is provided at both ends of the inner cylinder. A compressor mounting mechanism for a vehicle air conditioner is provided.

Action] The axial vibration component during the operation of the compressor is absorbed by the elastic body. At this time, since the balls of the linear ball bearing roll and move, vibrations are effectively absorbed. The linear ball bearing also acts to prevent deformation of the compressor shaft.

[Embodiment] FIGS. 1 and 2 show a first embodiment of the present invention, and the same components as those of the conventional example are denoted by the same reference numerals.

The side of the compressor mounting R of the illustrated vehicle air conditioner includes an object to be mounted, for example, a mount bracket 1 and a compressor 3 attached to the mount bracket 1. A plurality of through holes (second through holes) 21 are formed in the mount bracket 1 . A plurality of attachment portions 23 are integrally provided on the compressed Al 13. A through hole (first through hole) 25 is formed in the mounting portion 23 and extends through the driven shaft of the compressor 3 in the same direction. The inner diameter of the first through hole 25 is set larger than the inner diameter of the second through hole 21 of the mount bracket 1. A hexagonal bolt 5 is inserted into the first and second through holes 25°21. A hexagonal nut 7 is screwed onto the hexagonal bolt 5 via a washer 9. Note that a pulley 27 is attached to the tip of the driven shaft of the compressor 3.

A bushing 30 serving as a compressor mounting mechanism is fitted into the first through hole 25 . The bushing 30 has an inner cylinder 32 provided concentrically, a linear ball bearing 34, two ring-shaped elastic bodies 35, and a washer 37. The linear ball bearing 34 has a large number of rigid balls 39 and an outer cylinder 41 outside thereof. The ball 39 is the outer cylinder 4
A plurality of cylinders are arranged in the axial direction between the cylinder 1 and the inner cylinder 32.

Both ends between the outer cylinder 41 and the inner cylinder 32 are sealed by sealing plates 43. This linear ball bearing 34 is capable of rolling contact with low friction.

The elastic bodies 35 are made of rubber or the like, and are fitted into the outer peripheral surfaces of both ends of the inner cylinder 32, respectively. One side of the elastic body 35 is brought into contact with the attachment portion 23 and closes the first through hole 25 .

A flange portion 45 is formed at one end of the inner cylinder 32 .

The flange portion 45 serves to press one elastic body 35 against the attachment portion 23, and the other elastic body 35 is held between the washer 37 fitted to the other end of the inner cylinder 32 and the attachment portion. . The washer 37 is fixed to the inner cylinder 32 by press fitting, screw connection, caulking, or the like. This washer 37 is in contact with the mount bracket 1. The outer cylinder 41 and the inner cylinder 32 have rigidity, and the inner cylinder 32 is made longer than the outer cylinder 41.

Hexagonal bolts 5 are provided in the first through hole 25 and the second through hole 21.
is inserted. A washer 9 is provided between the head of one end of the hexagonal bolt 5 and the flange portion 45. The other end of the hexagonal bolt 5 protrudes from the second through hole 21 and is fixed by a hexagonal nut 7 through a washer 9.

With these configurations, when the pressure 4113 is operated, the pressure a
The axial vibration caused by R3 is absorbed by the elastic body 35. At this time, the rolling movement of three balls occurs due to the relative axial movement between the inner cylinder 32 and the outer cylinder 41. Therefore, noise caused by vibrations at a pressure of 8 m3 is effectively reduced.

Further, when the pulley 27 of the pressure aR3 and the clamp pulley (not shown) on the engine side are connected by a belt (not shown), a tensile force acts on the shaft of the pressure atlli3.

However, since the inner cylinder 32 contacts the hexagonal bolt 5 and the linear ball bearing 34, displacement of the shaft of the compressor 3 is prevented. At the same time, resonance of the compressor 3 due to vibrations from the engine is also prevented.

Furthermore, since the bushing 30 is sandwiched between the washer 37 and the flange portion 45, it will not come off from the mount bracket 1.

Specifically, the axial excitation force of the compressor 3 is approximately 2.5 mf.
, a belt tension of 50 krf is applied.

In this case, the friction coefficient of the rolling contact portion of the bushing 30 is preferably 0.01 or less.

In the sliding contact of the bushing 17 shown in FIG. 5 in the conventional example, 911! The minimum coefficient is about 0.04. Therefore, due to the action of the excitation force generated in the compressor 3, the inside f that should slide is
! j13 and the outer cylinder 11 do not move, and the function of alleviating the transmission of the lR mechanical torsional vibration force of the compressor 3 to the engine cannot be achieved. In this regard, in the case of the bush 30 using the linear ball bearing 34, the friction coefficient is less than 0.005, so that the mechanical vibration force is alleviated.

Next, FIG. 3 shows an embodiment in which stepped screws (herein also referred to as bolts) 50 are used to connect the compressor and the mount bracket 1. According to this, the pressure is 1i! 813
After the first through hole 25 and the linear ball bearing 34 are press-fitted, the inner cylinder 32 with the elastic body 35 on the left side in the figure attached to the inner cylinder 32 can be inserted into the linear ball bearing 34. After M, the elastic body 35 on the right side of the figure is attached to the inner cylinder 32, and the stepped bolt 50 inserted into the washer 37 on the right side is inserted into the inner cylinder, and the end face of the flange part 45 is inserted through the washer 9. Tighten with nut 7. In this way, Bush 30 is assembled. In this way, the stepped bolts 50 protrude from the compressor 3, making it easier to attach the compressor 3 to the mount bracket 1.

FIG. 4 shows yet another embodiment. In this embodiment, the bushing 60 has a concentric inner cylinder 62.
Linear ball bearing 61. Outer cylinder 64. ring-shaped 2
Two elastic bodies 65. and a washer 67. The linear ball bearing 61 has a large number of rigid balls 69 and a retainer 63 that holds these balls 69. A plurality of balls 69 are arranged in the axial direction between the outer cylinder 64 and the inner cylinder 62. According to this bushing 60, the rated load of the bearing can be improved.

In addition, in the above description, the bushing 30.60 is inserted into the first through hole 25.
Although it is provided in the second through hole 21, it may be provided in the second through hole 21,
Both the first and second through holes 25.21 may be provided.

[Effects of the Invention] As explained above, according to the compressor mounting mechanism of the vehicle air conditioner of the present invention, a linear ball bearing can be provided between the outer cylinder and the inner cylinder which are provided concentrically with each other. Because there is
The vibration of the 8-pressure engine can effectively reduce the unpleasant noise generated inside the car.

In addition, when the compressor 8#R and the engine are connected by a belt, even if the belt's tensile force acts on the compressor shaft, the rigid inner cylinder is in contact with the bolt and linear ball bearing, so the shaft of the compressor deformation that occurs on the surface can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first embodiment of the present invention in which a compressor is installed horizontally; FIG. 2 is an enlarged sectional view showing the main parts of FIG. 1;
FIG. 3 is an enlarged sectional view of essential parts showing a second embodiment of the compressor mounting mechanism according to the present invention, and FIG. 4 is an enlarged sectional view of essential parts showing a third embodiment of the compressor mounting mechanism according to the present invention. Figure 5 is an enlarged cross-sectional view showing the main part of the conventional compressor mounting m horizontally.
The figure is an enlarged cross-sectional view showing the main part of a conventional example of a pond with an m-structure attached to an a-pressure machine. 1; Mount bracket, 3; Pressure an, 5; Hexagon bolt, 7; Hexagon nut, 9; Washer, 11; Outer cylinder, 13; Inner cylinder, 17; Bush, 21: Second through hole, 23; Mounting part, 25: first through hole, 30; bushing, 32: inner cylinder,
, 34; linear ball bearing, 35; elastic body, 37
washer, 41; outer cylinder, 45; flange portion, 50; stepped screw (bolt). Figure 3 Figure 4

Claims (1)

[Claims] 1) A first through hole is provided in the mounting portion of the compressor so as to pass in the same direction as the axis of the compressor, and a second through hole is provided in the attached body so as to be coaxial with the first through hole. In the compressor mounting mechanism for a vehicle air conditioner, in which a bolt is inserted into the first and second through holes and screwed with a nut, the gap between the first through hole and the bolt or the first through hole is a bush is provided in at least one of the gaps between the second through hole and the bolt;
The bush includes a rigid inner cylinder provided concentrically with each other and a linear ball bearing capable of rolling contact with low friction, and the linear ball bearing includes an outer cylinder and an inner cylinder disposed inside the outer cylinder. 1. A compressor mounting mechanism for a vehicle air conditioner, comprising a ball, and elastic bodies are provided at both ends of the inner cylinder.