CN210218018U - Link mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly - Google Patents

Abstract

A connecting rod mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly comprises a main shaft, a push plate, a swash plate body, a connecting rod, a long pin, a sliding plate, a ball sleeve, a return spring and a starting spring; the long pin and the connecting rod are in interference fit, and the long pin and the push disc support lug and the long pin and the swash plate support lug are in clearance fit; furthermore, a first counter weight body is arranged on the swash plate body, a linear groove is formed in the swash plate body, a second counter weight body is arranged on the push plate, and SolidWorks three-dimensional design software is applied to optimize the overall structure of the spindle assembly of the automobile air-conditioning compressor, so that the eccentricity of the spindle assembly in the working state of medium and large displacement of the automobile air-conditioning compressor is reduced; therefore, the mechanical vibration of the automobile air-conditioning compressor is reduced, the overall operation noise is reduced, the impact strength and the operation noise of the swash plate assembly to the main shaft in a high-speed operation state are reduced, and the operation stability and the working efficiency of the air-conditioning compressor are improved.

Description

Link mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly

Technical Field

The utility model relates to a vehicle air conditioner compressor main shaft assembly, in particular to variable discharge capacity vehicle air conditioner compressor main shaft assembly of link mechanism swash plate formula internal control.

Background

At present, in the domestic automobile industry, the variable displacement compressor gradually becomes the mainstream model of the automobile air conditioner compressor, and the swash plate type variable displacement compressor occupies a larger proportion of the variable displacement compressor due to the reasons of simple structure, low processing cost and the like, wherein, the main structure of the connecting rod mechanism swash plate type internal control variable displacement compressor comprises: the device comprises a driving disc assembly, a belt pulley assembly, a coil assembly, a main shaft assembly, a front cover, a cylinder body, a piston, a valve plate assembly, a rear cover and a control valve. The main shaft assembly generally comprises a main shaft, a push disc, a swash plate body, a sliding disc and a ball sleeve, wherein the swash plate body and the push disc are connected together through a connecting rod and a long pin structure, the long pin and the connecting rod, the long pin and a lug hole of the push disc and the long pin and a lug hole of the swash plate body are in clearance fit, a small clamping ring is fixedly installed at the end of the long pin, and the long pin is limited relative to an outer lug surface of the push disc and the outer lug surface of the swash plate body. Because the clearance fit structures are adopted between the long pin and the connecting rod, between the long pin and the lug hole of the push disc and between the long pin and the lug hole of the swash plate body, relative mechanical movement exists between the long pin and the connecting rod in the axial direction and the radial direction under the high-speed running state of the swash plate body, incremental mechanical vibration is caused, and the running noise of the compressor is increased. Meanwhile, the swash plate assembly consisting of the swash plate body, the ball sleeve, the long pin and the connecting rod is of an asymmetric structure, so that the center of gravity of the swash plate assembly is inevitably deviated relative to the main shaft in the running process of the air conditioner compressor, namely, a certain deviation distance exists, the larger the eccentricity is, the more unstable the mechanism runs, the further increase of the whole running noise of the compressor is caused, and the use performance of the product is influenced. Therefore, it is necessary to further improve the design structure of the main shaft assembly, improve the operation stability of the swash plate type internal control variable displacement automobile air conditioner compressor of the link mechanism, reduce the overall operation noise, and improve the product usability.

Disclosure of Invention

The utility model aims at providing a variable discharge capacity vehicle air conditioner compressor main shaft assembly of link mechanism swash plate internal control is applied to in the variable discharge capacity vehicle air conditioner compressor of link mechanism swash plate internal control, improves the operating stability of compressor, reduces whole noise of operation, improves product performance.

A connecting rod mechanism swash plate type internal control variable displacement automobile air conditioner compressor spindle assembly comprises a spindle 1, a push plate 2, a swash plate body 4, a connecting rod 6, a long pin 8, a sliding plate 3, a ball sleeve 5, a return spring 7 and a starting spring 9; the push plate 2 is provided with two push plate support lugs 21, the swash plate body 4 is provided with two swash plate support lugs 11, the push plate support lugs 21 and the swash plate support lugs 11 are respectively provided with connecting lug holes, the width of the connecting rod 6 is respectively the same as the distance between the two push plate support lugs 21 and the two swash plate support lugs 11, two ends of the connecting rod 6 are respectively provided with a long pin hole correspondingly matched with the connecting lug holes, two ends of the connecting rod 6 are respectively embedded and clamped between the two push plate support lugs 21 and the two swash plate support lugs 11, two long pins 8 respectively penetrate through the connecting lug holes on the push plate support lugs 21 and the swash plate support lugs 11 and the long pin holes of the connecting rod 6 in sequence, the connecting rod 6 is connected to the push plate 2 and the swash plate body 4, and the push plate 2 and the swash plate body 4 are connected together through the connecting rod 6; the long pin 8 and the connecting rod 6 are connected in an interference fit manner, so that the long pin 8 and the connecting rod 6 cannot move relatively, the long pin 8 and the push plate lug 21 and the long pin 8 and the swash plate lug 11 are connected in a clearance fit manner, and the push plate 2 and the swash plate body 4 can respectively rotate relative to the connecting rod 6 by taking the long pin 8 at the corresponding position as an axis; because the interference fit between the connecting rod 6 and the long pin 8 already fixes and limits the long pin, no other limiting measures such as installation of a small clamping ring and the like need to be taken at the end of the long pin 8, and the design structure is simplified.

In the link mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly, a swash plate assembly composed of the push plate 2, a swash plate body 4, a connecting rod 6, a long pin 8 and a sliding plate 3 is in an asymmetric integrated structure, so that the swash plate assembly always has a center of gravity deviation relative to the main shaft 1, namely: the gravity center point A of the swash plate assembly has a certain eccentricity X relative to the axis of the main shaft 1, and in the running process of the automobile air conditioner compressor, the larger the eccentricity X is, the higher the mechanical impact strength of the swash plate assembly on the main shaft 1 is, so that the running stability of the air conditioner compressor mechanism is easily reduced, the running noise is increased, and the use performance of a product is influenced. Further, in order to optimize the overall structure of the spindle assembly of the link mechanism swash plate type internal control variable displacement automobile air conditioner compressor, a first counterweight body 12 is arranged on the other side, opposite to the swash plate support lug 11, of the base body 10 of the swash plate body 4, the first counterweight body 12 is equal in diameter to the base body 10 and has a certain height H, a linear groove 13 is formed in one side, close to the swash plate support lug 11, of the base body 10, and the linear groove 13 is used for reducing the weight difference between one side, close to the swash plate support lug 11, of the swash plate body 4 and one side, close to the counterweight body 12, and improving the adjustment sensitivity of the counterweight body 12 to the center of gravity point a; meanwhile, a second counterweight body 22 is arranged on the other side, opposite to the push plate support lug 21, of the push plate 2, the second counterweight body 22 is a semicircular disc body, the semicircular disc body is concentric with the push plate 2, and the radius R is larger than the radius R of the body of the push plate 2.

Still further, since the automobile air-conditioning compressor is in a working state of medium and large displacement at most of the time in the running and using process, usually in the working state of medium and large displacement, the inclination angle C of the swash plate body 4 in the link mechanism swash plate type internal control variable displacement automobile air-conditioning compressor spindle assembly is 5 to 22 °, and the structural modeling optimization and reduction are performed on the link mechanism swash plate type internal control variable displacement automobile air-conditioning compressor spindle assembly by using solid works three-dimensional design software, wherein: on the inclined disc body 4, the ratio between the maximum height H of the first counterweight body 12 and the thickness D of the inclined disc body 4 is 1.21-1.53, and on the push disc 2, the ratio between the radius R of the second counterweight body 22 and the radius R of the body of the push disc 2 is 1.14-1.22.

The utility model has the advantages that: the long pin and the connecting rod are connected in an interference fit manner, so that relative movement between the long pin and the connecting rod is limited, mechanical vibration is reduced, and operation noise is reduced; the structure, shape and size of the swash plate and the push plate are further adjusted and improved, the gravity center position of the swash plate assembly is optimized, the eccentricity of the main shaft assembly of the swash plate type internal control variable displacement automobile air-conditioning compressor of the link mechanism in the working state of medium and large displacement is reduced, the impact strength and the running noise of the swash plate assembly to the main shaft in the high-speed running state are reduced, and the running stability and the working efficiency of the air-conditioning compressor are improved.

Drawings

Fig. 1, the utility model relates to a variable discharge capacity vehicle air conditioner compressor main shaft assembly structure chart of link mechanism swash plate formula internal control.

Fig. 2, the utility model relates to a variable discharge capacity vehicle air conditioner compressor main shaft assembly left side view of link mechanism swash plate formula internal control.

Fig. 3 and a schematic diagram of a matching structure of the link mechanism in a section B-B in fig. 1.

FIG. 4 is a side sectional view of the swash plate structure.

Fig. 5, top view of the push plate structure.

FIG. 6 shows the change rule of the gravity moment borne by the main shaft of the automobile air-conditioning compressor along with the inclination angle of the swash plate body in the preferred embodiment.

FIG. 7 shows the change rule of the gravity moment borne by the main shaft of the automobile air-conditioning compressor along with the inclination angle of the swash plate body in the prior art.

Detailed Description

The claimed technical solution is further described below with reference to the specific embodiments and the accompanying drawings.

A link mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly for Jili FE-6 platform vehicle type 6SV14 model is composed of a main shaft 1, a push plate 2, a swash plate body 4, a connecting rod 6, a long pin 8, a sliding plate 3, a ball sleeve 5, a return spring 7 and a starting spring 9 as shown in figure 1; as shown in fig. 2, the connection mode between the long pin 8 and the connecting rod 6 is interference fit, and the connection mode between the long pin and the pushing plate lug 21 on the pushing plate 2 and the swash plate lug 11 on the swash plate body 4 is clearance fit.

The radius r of the push disc 2 is 36 mm, the thickness of the push disc is 4.2 mm, the distance between the two push disc support lugs 21 is 20 mm, and a second counterweight body 22 is arranged on the other side, opposite to the push disc support lugs 21, of the push disc 2; the radius of the swash plate body 4 is 24.5 mm, the thickness D is 18.7 mm, the distance between the two swash plate support lugs 11 is also 20 mm, a first counterweight body 12 is arranged on the other side, opposite to the swash plate support lugs 11, of the swash plate body 4, the inclination angle P of the top of the first counterweight body 12 is 22 degrees, and a linear groove 13 formed in the swash plate body 4 is 7.6 mm in width and 4.0 mm in depth; the width of the connecting rod 6 corresponds to the distance between the two push tray support lugs 21 and the two swash plate support lugs 11 respectively, and is 20 mm.

Performing structural modeling optimization on the spindle assembly of the connecting rod mechanism swash plate type internal control variable displacement automobile air conditioner compressor by using SolidWorks three-dimensional design software, and selecting a simulation target for optimizing the radius R of the second counterweight body 22 on the push plate 2 and the maximum height H of the first counterweight body 12 on the swash plate body 4 as shown in FIG. 4 and FIG. 5 under the simulation condition that the eccentric distance X is minimum within the range of the inclination angle C of the swash plate body 4 being 5-22 degrees; the table 1, the table 2 and the table 3 respectively list the data changes of the eccentricity X and the gravity moment of the swash plate body 4 in the main shaft assembly of the connecting rod mechanism swash plate type internal control variable displacement automobile air conditioner compressor under different inclination angles under different numerical value combination conditions of H and R, comparing the simulation data shown in table 1, table 2 and table 3, it can be seen that, in the operating state of medium and large displacement of the automobile air conditioner compressor characterized by the inclination angle C of the swash plate body 4 being in the range of 5 to 22 degrees, under the condition of the parameter combination listed in Table 1, wherein H is 27.2 mm and R is 42.5 mm, the connecting rod mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly has the smallest eccentricity X, meanwhile, the gravity moment is also minimum, which shows that the impact strength of the main shaft 1 on the high-speed swash plate assembly is also minimum under the parameter combination state.

Meanwhile, fig. 6 and 7 respectively show the change rule of the gravity moment borne by the main shaft 1 along with the inclination angle C of the swash plate body 4 under the condition of the preferred parameter combination with H of 27.2 mm and R of 42.5 mm and the change rule of the gravity moment borne by the main shaft along with the inclination angle C of the swash plate body 4 in the prior art, as can be seen from fig. 6 and 7, the inclination angle C of the swash plate body 4 is within the range of 5 to 22 degrees, and under the preferred parameter combination condition, the main shaft 1 bears the maximum gravity moment M_max39.89g.cm, the amplitude of the periodic variation △ M of the gravitational moment is 38.23 g.cm, whereas the spindle 1 is subjected to the maximum gravitational moment M in the prior art_maxIs 61.47g.cm, the periodic variation amplitude △ M of gravity moment is 43.46g.cm, and the data show that the utility model discloses under the preferred parameter combination condition, main shaft 1 receives maximum gravity moment Mmax and the periodic variation amplitude of the gravity moment that receivesThe value △ M is smaller than the corresponding value in the prior art, that is, the fluctuation amplitude of the maximum moment and the moment received by the main shaft 1 is smaller than the technical scheme in the prior art, the main shaft assembly of the automobile air-conditioning compressor can obviously reduce the mechanical impact strength to the main shaft 1, and the working stability of the main shaft assembly of the automobile air-conditioning compressor is improved.

Further, a comparison test of operation noise between the link mechanism swash plate type internal control variable displacement automobile air-conditioning compressor in the preferred technical scheme of the embodiment and the same type of automobile air-conditioning compressor in the prior art shows that the overall operation noise of the automobile air-conditioning compressor applying the technical scheme of the embodiment can be reduced by more than 3db (a), compared with the product in the prior art, the monitoring data shown in table 4 show that the overall noise can be reduced by 3.33db (a) at the working rotating speed of 800 rpm, the overall noise can be reduced by 4.13db (a) at the working rotating speed of 2000 rpm, and the noise reduction effect is obvious.

To sum up, in this embodiment, it is preferable that the maximum height H of the first counterweight 12 is 27.2 mm, and the radius R of the second counterweight 22 is 42.5 mm, under the condition of the combination of the preferable parameters, the operation stability of the automotive air conditioning compressor using the spindle assembly of the swash plate type internal control variable displacement automotive air conditioning compressor with the link mechanism is improved, and the overall operation noise is significantly reduced, at this time, the ratio between the maximum height H of the first counterweight 12 on the swash plate body 4 and the thickness D of the swash plate body 4 is 1.45, and the ratio between the radius R of the second counterweight 22 on the push plate 2 and the body radius R of the push plate 2 is 1.18.

TABLE 1 first set of simulation data

TABLE 2 second set of simulation data

TABLE 3 third set of simulation data

TABLE 4 noise detection data of the air conditioner compressor of the vehicle using the preferred embodiment and the prior art

Claims (3)

1. A connecting rod mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly comprises a main shaft (1), a push plate (2), a swash plate body (4), a connecting rod (6), a long pin (8), a sliding plate (3), a ball sleeve (5), a reset spring (7) and a starting spring (9); the push plate (2) is provided with two push plate support lugs (21), the inclined plate body (4) is provided with two inclined plate support lugs (11), the push plate support lugs (21) and the inclined plate support lugs (11) are respectively provided with connecting lug holes, the width of the connecting rod (6) is respectively the same as the distance between the two push plate support lugs (21) and the two inclined plate support lugs (11), two ends of the connecting rod (6) are respectively provided with a long pin hole correspondingly matched with the connecting lug holes, two ends of the connecting rod (6) are respectively embedded and clamped between the two push plate support lugs (21) and the two inclined plate support lugs (11), two long pins (8) respectively sequentially penetrate through the push plate support lugs (21) and the connecting lug holes on the inclined plate support lugs (11) and the long pin holes of the connecting rod (6), and the connecting rod (6) is connected on the push plate (2) and the inclined plate body (4), the push disc (2) and the oblique disc body (4) are connected together through the connecting rod (6); the method is characterized in that:

the long pin (8) with the connected mode between connecting rod (6) is interference fit, makes long pin (8) with can not produce relative motion between connecting rod (6), long pin (8) with between push away dish journal stirrup (21), long pin (8) with the connected mode between swash plate journal stirrup (11) is clearance fit.

2. The link mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly as claimed in claim 1, wherein: a first counterweight body (12) is arranged on the other side, opposite to the swash plate support lug (11), of the base body (10) of the swash plate body (4), the first counterweight body (12) and the base body (10) are equal in diameter and have a height H, and a linear groove (13) is formed in one side, close to the swash plate support lug (11), of the base body (10); meanwhile, a second counterweight body (22) is arranged on the push disc (2) and on the opposite side of the push disc support lug (21), the second counterweight body (22) is a semicircular disc body, the semicircular disc body is concentric with the push disc (2), and the radius R is larger than the body radius R of the push disc (2).

3. The link mechanism swash plate type internal control variable displacement automobile air conditioner compressor main shaft assembly as claimed in claim 2, wherein: on the swash plate body (4), the ratio of the maximum height H of the first counterweight body (12) to the thickness D of the swash plate body (4) is 1.21-1.53; meanwhile, on the push disc (2), the ratio of the radius R of the second counterweight body (22) to the radius R of the body of the push disc (2) is 1.14-1.22.

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