CN113027914A

CN113027914A - Combined bearing, bearing group, internal combustion engine, compressor and plug pump

Info

Publication number: CN113027914A
Application number: CN202110173890.6A
Authority: CN
Inventors: 郭立军; 赵怀山; 黎明; 陈永祥
Original assignee: Beijing Sinocep Engine Technology Co Ltd
Current assignee: Beijing Sinocep Engine Technology Co Ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-06-25

Abstract

The application provides a combination bearing, includes: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller; the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole; the bearing inner ring is positioned on the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole. The combined bearing combines the intermediate body with the eccentric hole, the bearing outer ring and the bearing inner ring into one component, replaces the effects of three components, namely a round slide block and two bearings, in the prior art, reduces the number of parts, improves the weak link of the mechanism, and reduces the problem of mechanism faults.

Description

Combined bearing, bearing group, internal combustion engine, compressor and plug pump

Technical Field

The application relates to a rolling bearing and a machine adopting a crank round slider mechanism, in particular to a combined bearing; the invention also relates to a bearing group adopting the combined bearing, and an internal combustion engine, a compressor and a plug pump using the combined bearing or the bearing group.

Background

In mechanical devices, there are many occasions where it is necessary to achieve interconversion between reciprocating motion and rotary motion. For example, a reciprocating internal combustion engine needs to convert a reciprocating linear motion of a piston, which is pushed by an explosion pressure of a combustible mixed gas, into a rotational motion of a crankshaft; in contrast, the compressor needs to convert the rotation of the crankshaft driven by the external motor into the reciprocating linear motion of the piston. The two conversions have the same requirements on the kinematics of the mechanism except that the driving part is different, so that the mechanism capable of converting the reciprocating linear motion into the rotary motion can be realized, and the mechanism can also be generally used for converting the rotary motion into the reciprocating linear motion.

In the prior art, a crank-link mechanism is usually adopted to realize the interconversion between the reciprocating linear motion and the rotary motion. The crank-link mechanism needs to be connected between the reciprocating motion piece and the rotating motion piece through a connecting rod which swings back and forth, the motion of the connecting rod is a complex motion which is difficult to balance inertia force, the swinging of the connecting rod can increase the side pressure of a piston to the side wall of a motion guide rail, and the friction force is increased.

In order to solve the above problems, the prior art uses a circular slider having an eccentric circular hole instead of a connecting rod, the eccentric circular slider being cylindrical and having an eccentric circular hole parallel to the axis of the cylinder, the eccentric circular hole being used for passing through a crank pin of a crankshaft. The circular slider, as a key element in the mechanism, is rotatably fitted with the crank pin of the crankshaft and the circular slider receiving hole provided in the reciprocating member, respectively, and bearing elements are inevitably introduced at these two fitting portions. After the bearing element is introduced, the circular slider and the bearing are combined to form a combined bearing, the eccentric circular hole of the circular slider and the bearing generate rotary motion, the inner ring of the bearing is used for penetrating through a shaft handle pin of a crankshaft, the periphery of the circular slider and the bearing generate rotary motion, and the outer ring of the bearing is arranged in a circular slider accommodating hole in the reciprocating motion piece.

The introduced bearing element needs to be matched with the two bearings to move in the mechanism movement, which is a weak link of the mechanism, so that not only are a plurality of parts installed in the mechanism, but also the mechanism is easy to break down due to the matching movement among a plurality of parts.

Disclosure of Invention

The application provides a combination bearing to solve among the prior art motion structure that the mechanism was constituteed in the cooperation between round slider and two bearings, not only lead to the part of mechanism's installation to be many partially, the problem that the cooperation motion caused the mechanism to break down between a plurality of parts moreover. The application simultaneously provides a bearing group adopting the combined bearing, and an internal combustion engine, a compressor and a plug pump using the combined bearing or the bearing group.

The application provides a combination bearing, includes: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller; the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole; the bearing inner ring is positioned on the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole.

Alternatively, the rollers are spherical, cylindrical, conical or plate-shaped.

Optionally, the rollers distributed between the bearing inner ring and the eccentric hole are balls, and the balls are distributed in double rows along the axial direction of the bearing inner ring.

Optionally, the rollers distributed between the bearing outer ring and the eccentric body are balls, and the balls are distributed in a single row along the axial direction of the bearing outer ring.

Optionally, the intermediate body further includes two positioning pin holes running through the intermediate body in the axial direction, and the two positioning pin holes are axially and symmetrically distributed on two sides of the eccentric hole by using a connecting line between the center of the eccentric hole and the center of the intermediate body.

Optionally, the intermediate further comprises: removing the heavy structure; the weight removing structure and the eccentric hole are arranged opposite to each other in the middle body; the positioning pin hole and the eccentric hole are arranged on the same side in the intermediate body.

Optionally, the deduplication structure includes: the fan-shaped groove and the weight-removing holes distributed in the fan-shaped groove; the weight-removing holes comprise a first group of weight-removing holes and a second group of weight-removing holes, and the first group of weight-removing holes and the second group of weight-removing holes are symmetrically distributed in the fan-shaped groove by respectively taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; the first group of the weight-removing holes are closer to the center line position formed by the connecting line of the center of the eccentric hole and the center of the middle body than the second group of the weight-removing holes, and the inner diameter of the first group of the weight-removing holes is larger than that of the second group of the weight-removing holes.

Optionally, the deduplication structure includes: the fan-shaped groove and the two weight-removing holes distributed in the fan-shaped groove are formed in the outer wall of the fan-shaped groove; the two weight-removing holes are symmetrically distributed in the fan-shaped groove by taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; and the two weight-removing holes are positioned in the fan-shaped groove and far away from the central line position formed by a connecting line of the center of the eccentric hole and the center of the circular sliding block.

Optionally, the bearing inner ring is used for being mounted on a crank pin of a crankshaft, and the bearing outer ring is used for being mounted on a middle body containing hole with an eccentric hole on the reciprocating piece.

The application also provides a bearing group, including two combination bearings, be provided with the locating pin hole that corresponds each other on the midbody that has the eccentric orfice of adjacent combination bearing each other, its characterized in that, through the locating pin that inserts the locating pin hole, adjacent combination bearing obtains location each other, and the axis of the bearing inner race of adjacent combination bearing is located same straight line, and the bearing outer lane phase place of adjacent combination bearing each other is 180 degrees settings, and the axis symmetry set up in the axis both sides of bearing inner race.

Optionally, the combination bearing includes: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller; the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole; the bearing inner ring is positioned at the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole; the intermediate comprises: the de-weight structure and the eccentric hole are arranged oppositely in the intermediate body; the deduplication structure comprises: the fan-shaped groove and the weight-removing holes distributed in the fan-shaped groove; the weight-removing holes comprise a first group of weight-removing holes and a second group of weight-removing holes, and the first group of weight-removing holes and the second group of weight-removing holes are symmetrically distributed in the fan-shaped groove by respectively taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; the first group of the weight-removing holes are closer to the center line position formed by the connecting line of the center of the eccentric hole and the center of the middle body than the second group of the weight-removing holes, and the inner diameter of the first group of the weight-removing holes is larger than that of the second group of the weight-removing holes.

The application also provides a bearing group, which comprises a first combined bearing, a second combined bearing and a third combined bearing; the first combined bearing and the second combined bearing are respectively and symmetrically distributed on two sides of the third combined bearing, and the bearing inner ring of the first combined bearing, the bearing inner ring of the second combined bearing and the central axis of the bearing inner ring of the third combined bearing are positioned on the same straight line; the first combination bearing, the second combination bearing with all be provided with the locating pin hole that corresponds each other on the third combination bearing, through inserting the locating pin of locating pin hole, adjacent combination bearing obtains location each other, and the bearing inner race phase place of adjacent combination bearing is 180 degrees settings, and the axis symmetry set up in the axis both sides of bearing inner race, the bearing inner race of first combination bearing with the axis of the bearing inner race of second combination bearing is located same straight line.

Optionally, the first combination bearing and the second combination bearing have the same outer profile thickness, and the third combination bearing has an outer profile thickness different from that of the first combination bearing and the second combination bearing; wherein the first combination bearing and the second combination bearing have the same structure, and the first combination bearing comprises: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller; the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole; the bearing inner ring is positioned at the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole; the intermediate comprises: the de-weight structure and the eccentric hole are arranged oppositely in the intermediate body; the deduplication structure comprises: the fan-shaped groove and the weight-removing holes distributed in the fan-shaped groove; the weight-removing holes comprise a first group of weight-removing holes and a second group of weight-removing holes, and the first group of weight-removing holes and the second group of weight-removing holes are symmetrically distributed in the fan-shaped groove by respectively taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; the first group of the weight-removing holes are closer to the center line position formed by the connecting line of the center of the eccentric hole and the center of the middle body than the second group of the weight-removing holes, and the inner diameter of the first group of the weight-removing holes is larger than that of the second group of the weight-removing holes.

Optionally, the third combined bearing has a structure different from that of the first combined bearing, and the third combined bearing includes: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller; the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole; the bearing inner ring is positioned at the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole; the intermediate comprises: the de-weight structure and the eccentric hole are arranged oppositely in the intermediate body; the deduplication structure comprises: the deduplication structure comprises: the fan-shaped groove and the two weight-removing holes distributed in the fan-shaped groove are formed in the outer wall of the fan-shaped groove; the two weight-removing holes are symmetrically distributed in the fan-shaped groove by taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; and the two weight-removing holes are positioned in the fan-shaped groove and far away from the central line position formed by a connecting line of the center of the eccentric hole and the center of the circular sliding block.

The present application also provides an internal combustion engine that uses the above-described combination bearing, and/or the above-described bearing set.

The present application also provides a compressor that uses the above-described combination bearing, and/or the above-described bearing set.

The present application also provides an embolic pump that uses the above-described combination bearing, and/or the above-described bearing set.

Compared with the prior art, the combined bearing that this application provided includes: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller; the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole; the bearing inner ring is positioned on the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole. The combined bearing combines the intermediate body with the eccentric hole, the bearing outer ring and the bearing inner ring into one component, replaces the effects of three components, namely a round slide block and two bearings, in the prior art, reduces the number of parts, improves the weak link of the mechanism, and reduces the problem of mechanism faults.

Drawings

Fig. 1 is a first structural schematic diagram of a combined bearing provided in an embodiment of the present application.

Fig. 2 is a second structural schematic diagram of a combined bearing provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a first bearing set according to an embodiment of the present application.

Fig. 4 is a cross-sectional view of fig. 3.

Fig. 5 is a schematic structural diagram of a second bearing set according to an embodiment of the present application.

Fig. 6 is a cross-sectional view of fig. 5.

The bearing comprises a bearing outer ring 1, a bearing inner ring 2, a middle body 3 with eccentric holes, a roller 4, a first group of weight removing holes 3-1, a second group of weight removing holes 3-2, a first positioning pin hole 3-3, a second positioning pin hole 3-4, a second bearing outer ring 21, a second bearing inner ring 22, a second middle body 23 with eccentric holes, a third group of weight removing holes 23-2, a third positioning pin hole 23-3 and a fourth positioning pin hole 23-4.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit of this application and is therefore not limited to the specific implementations disclosed below.

Example one

The application provides a combination bearing to solve among the prior art motion structure that the mechanism was constituteed in the cooperation between round slider and two bearings, not only lead to the part of mechanism's installation to be many partially, the problem that the cooperation motion caused the mechanism to break down between a plurality of parts moreover. The application also provides a bearing set and another bearing set.

The combination bearing provided by the embodiments of the present application will be described and explained in detail below.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic view illustrating a first structure of a combined bearing according to an embodiment of the present application. Fig. 2 is a second structural schematic diagram of a combined bearing provided in an embodiment of the present application. The following description is made separately.

In fig. 1, a combination bearing 100 includes: the bearing comprises a bearing outer ring 1, a bearing inner ring 2, a middle body 3 with eccentric holes and rollers 4.

The bearing outer ring 1 is positioned on the outer side of the intermediate body 3 with the eccentric hole, and rollers 4 are distributed between the bearing outer ring 1 and the intermediate body 3 with the eccentric hole; the bearing inner ring 2 is positioned at the inner side of the eccentric hole of the intermediate body 3, and rollers 4 are distributed between the bearing inner ring 2 and the eccentric hole.

The bearing outer ring 1 is used for being mounted in an intermediate body containing hole with an eccentric hole on a reciprocating member, and the bearing inner ring 2 is used for being mounted on a crank pin of a crank shaft.

As shown in fig. 1 and 2, the bearing outer ring 1 is engaged with the intermediate body 3 with the eccentric hole through rollers 4, as shown in fig. 4 and 6, the rollers 4 are balls, and are distributed between the bearing outer ring 1 and the intermediate body 3 with the eccentric hole in a single row along the axial direction of the bearing outer ring. Correspondingly, the bearing inner ring 2 is connected with the intermediate body 3 with the eccentric hole through the roller 4, as shown in fig. 4 and 6, the balls are distributed between the bearing inner ring 2 and the eccentric hole along the axial direction of the bearing inner ring in double rows. Based on the structure, the bearing outer ring 1, the intermediate body 3 with the eccentric hole and the bearing inner ring 2 are connected to form a combined bearing, and the bearing outer ring and the bearing inner ring are driven to move in the mechanism.

The rollers 4 are used for respectively connecting the bearing outer ring with the intermediate body, and connecting the bearing inner ring with the eccentric holes of the intermediate body, and ensuring that the intermediate body with the eccentric holes can simultaneously drive the bearing outer ring and the bearing inner ring to move. The roller may be spherical, plate-shaped, conical, etc., and is not limited herein.

The middle body 3 with the eccentric hole is similar to a round slide block structure in a crank round slide block mechanism.

In order to combine a plurality of combined bearings in a specific way, such as the combined way of the bearing group shown in fig. 3 and 5, the gravity center of the bearing group is positioned on the central axis of the eccentric hole of the intermediate body, and the intermediate body is provided with a weight removing structure and two positioning pin holes which penetrate through the intermediate body in the axial direction, as shown in fig. 1. The weight removing structure and the eccentric hole are arranged opposite to each other in the middle body; the positioning pin hole and the eccentric hole are arranged on the same side in the intermediate body. Which are described separately below.

As shown in fig. 1, the registration pin holes include a first registration pin hole 3-3 and a second registration pin hole 3-4. The two positioning pin holes are axially and symmetrically distributed on two sides of the eccentric hole by a connecting line of the center of the eccentric hole and the center of the intermediate body, and are used for fixing the combined bearing when a plurality of combined bearings are combined in a specific mode. In addition, one end of the positioning pin hole is also provided with a clamping ring groove for fixing the two connected combined bearings, and the two combined bearings are prevented from falling off from the positioning pin hole due to friction in the moving process.

In fig. 1, the deduplication structure comprises: the fan-shaped groove and the weight-removing holes distributed in the fan-shaped groove; the de-weight holes comprise a first group of de-weight holes 3-1 and a second group of de-weight holes 3-2, and the first group of de-weight holes 3-1 and the second group of de-weight holes 3-2 are symmetrically distributed in the fan-shaped groove by respectively taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; the first group of the weight-removing holes 3-1 are closer to the central line formed by the connecting line of the center of the eccentric hole and the center of the intermediate body than the second group of the weight-removing holes 3-2, and the inner diameter of the first group of the weight-removing holes 3-1 is larger than that of the second group of the weight-removing holes 3-2.

In the combined bearing in the embodiment, the bearing outer ring, the bearing inner ring and the intermediate body with the eccentric hole are combined into one component, and the combined bearing is used in mechanisms such as an internal combustion engine, a compressor or a plug pump, and can reduce parts mounted by the mechanisms and avoid the problem of frequency of mechanism faults caused by the matching motion among a plurality of parts.

In addition to the first structural schematic diagram of the combined bearing provided in the embodiment of the present application, in fig. 2, the present application also provides a second structural schematic diagram of the combined bearing.

As can be seen from fig. 2, the combination bearing 200 also includes: an outer bearing ring 21, an inner bearing ring 22, an intermediate body 23 with eccentric holes, and rollers 4. The bearing outer ring 21 is positioned at the outer side of the intermediate body 23 with the eccentric hole, and rollers 4 are distributed between the bearing outer ring 21 and the intermediate body 23 with the eccentric hole; the bearing inner ring 22 is positioned at the inner side of the eccentric hole of the intermediate body 23, and rollers 4 are distributed between the bearing inner ring 22 and the eccentric hole.

As can be seen from a comparison between fig. 1 and 2, the combination bearing 200 of fig. 2 differs from the combination bearing 100 of fig. 1 in that the number of the weight-removing holes of the weight-removing structure is different, and in that the thicknesses of the bearing outer ring and the bearing inner ring are different.

In fig. 2, the deduplication structure comprises: the fan-shaped groove and two de-weighting holes 23-2 distributed in the fan-shaped groove; the two weight-removing holes are symmetrically distributed in the fan-shaped groove by taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; and the two weight-removing holes are positioned in the fan-shaped groove and far away from the central line position formed by a connecting line of the center of the eccentric hole and the center of the circular sliding block.

In addition, the thickness of the outer ring and the inner ring of the combined bearing 200 shown in fig. 2 is larger than that of the combined bearing 100 shown in fig. 1, and the difference of the weight-reducing structure is that when one combined bearing 200 shown in fig. 2 and two combined bearings 100 shown in fig. 1 are formed into a bearing set, the center of gravity of the bearing set is on the central axis of the inner ring.

The above is a first structural schematic diagram of the combined bearing 100 in fig. 1 provided in the embodiment of the present application, and a second structural schematic diagram of the combined bearing 200 in fig. 2.

Example two

The combined bearings are combined according to a specific combination mode to form a bearing set which is used in a crank round slide block mechanism. Fig. 3 is a schematic structural diagram of a first bearing set provided in an embodiment of the present application, and a bearing set in which two combined bearings 100 shown in fig. 1 are combined is used. Fig. 4 is a cross-sectional view of fig. 3, and is described in detail below with reference to fig. 3 and 4.

In fig. 3, a bearing set 300 is formed by combining two combined bearings 100 shown in fig. 1, and two adjacent combined bearings are fixedly connected by using a positioning pin hole provided on an intermediate body with an eccentric hole. Specifically, through the locating pin that inserts the locating pin hole, adjacent combination bearing obtains mutual location, and the axis of the bearing inner race of adjacent combination bearing is located same straight line. The phases of the outer rings of the combined bearings adjacent to each other are arranged at 180 degrees, and the central axes are symmetrically arranged on two sides of the central axis of the inner ring of the bearing. Referring to fig. 4, which is a sectional view of fig. 3, in fig. 4, the inner races of the two combination bearings are coaxial, and the central axes of the two inner races are located on the same straight line. And the phase positions of the outer rings of the two combined bearings are 180 degrees, and the central axes of the outer rings of the two combined bearings are symmetrically distributed by the central axis of the inner ring of the bearing.

When the crank pin mechanism works, the crank pin simultaneously penetrates through the bearing inner rings of the two combined bearings, so that the two combined bearings can move simultaneously. Through the matching relation, the two combined bearings can be held to keep a normal phase relation with each other when the rolling bearing or the crank round slider mechanism moves.

The bearing set is used in a crank circular slider mechanism or a rolling bearing, so that the embodiment of the corresponding crank circular slider mechanism or rolling bearing mechanism can be obtained, and the crank circular slider mechanism or rolling bearing mechanism is used in mechanical equipment, so that the embodiment of the mechanical equipment using the crank circular slider mechanism or rolling bearing mechanism can be obtained, wherein the mechanical equipment can be an internal combustion engine, a compressor and a plug pump.

This is the bearing set 300 of fig. 3 assembled by using the combined bearing 100 shown in fig. 1.

EXAMPLE III

In addition, a combination bearing 200 shown in fig. 2 and two combination bearings 100 shown in fig. 1 may be combined to form a second bearing set having three combination bearings, such as a bearing set 500 shown in fig. 5, which is a schematic structural diagram of the second bearing set provided in the embodiments of the present application. Fig. 6 is a cross-sectional view of fig. 5, and is described in detail below with reference to fig. 5 and 6.

In fig. 5, the bearing set 500 includes a first combination bearing, a second combination bearing, and a third combination bearing.

The first combined bearing and the second combined bearing are symmetrically distributed on two sides of the third combined bearing respectively, and the bearing inner ring of the first combined bearing, the bearing inner ring of the second combined bearing and the central axis of the bearing inner ring of the third combined bearing are located on the same straight line.

Specifically, the first combination bearing and the second combination bearing are the combination bearing 100 shown in fig. 1, and the third combination bearing is the combination bearing 200 shown in fig. 2. Therefore, the outer profile thicknesses of the first combination bearing and the second combination bearing are the same, and the outer profile thickness of the third combination bearing is different from the outer profile thicknesses of the first combination bearing and the second combination bearing. Based on the difference in thickness, after the first combination bearing, the second combination bearing and the third combination bearing are combined, the center of gravity of the bearing set 500 in fig. 5 is located at the central axis of the bearing inner ring of the previous combination bearing.

The first combined bearing, the second combined bearing and the third combined bearing are all provided with corresponding locating pin holes, adjacent combined bearings are located mutually through inserting the locating pins of the locating pin holes, and the locating pins are provided with clamping ring grooves for fixing the three combined bearings, so that the combined bearings are prevented from being separated from the locating pins due to friction in the moving process.

Adopt locating pin fixed connection's mode to connect the combination bearing in this embodiment, the connection between its combination bearing can also adopt other fixed connection's mode, and any connection that can satisfy between the combination bearing is fixed, and it is convenient to dismantle to guarantee that the connection mode at the phase angle between each combination bearing all can, this embodiment does not restrict the connection mode here.

The bearing outer ring phase place of adjacent combination bearing is 180 degrees settings, and the axis symmetry set up in the axis both sides of bearing inner race, the bearing outer ring of first combination bearing with the axis of the bearing outer ring of second combination bearing is located same straight line.

Referring to fig. 6, which is a sectional view of fig. 5, in fig. 6, the inner races of the three combination bearings are coaxial, and the central axes of the three inner races are located on the same straight line. In addition, the phases of two adjacent bearing outer rings of the three combined bearings are arranged at 180 degrees, the central axes of the bearing outer rings of the first combined bearing and the third combined bearing are positioned on the same straight line, and the central axis of the bearing outer ring of the third combined bearing and the central axes of the bearing outer rings of the first combined bearing and the third combined bearing are symmetrically distributed by using the central axis of the bearing inner rings.

As can be seen from fig. 6, the thickness of the second combination bearing (i.e., the combination bearing 200 in fig. 2) located in the middle of the bearing set 500 in fig. 5 is thicker than the first and third combination bearings (i.e., the combination bearings 100 in fig. 1) located on both left and right sides thereof, because the mass of the second combination bearing needs to be equal to the sum of the masses of the combination bearings on both sides, that is, the mass of one combination bearing 200 in fig. 2 is equal to the sum of the masses of two combination bearings 100 in fig. 1.

When the crank pin mechanism works, the crank pin simultaneously penetrates through the bearing inner rings of the three combined bearings, so that the three combined bearings can move simultaneously. Through the matching relation, the three combined bearings can be accommodated to keep a normal phase relation when the rolling bearing or the crank circular slider mechanism moves.

With the bearing set, one element of the combined bearing can replace three elements, and the opposite end surfaces of the bearings are attached to each other, so that the bearing set has various improvements compared with the prior art, and the specific description is as follows.

Firstly, in the combined bearing in the embodiment, the bearing outer ring, the bearing inner ring and the intermediate body with the eccentric hole are combined into one component, so that the parts for mounting the mechanism can be reduced, and the problem of frequency of failure of the mechanism caused by the matching motion among a plurality of parts is solved.

Secondly, the intermediate body with the eccentric hole in the combined bearing is provided with the weight removing groove and the weight removing hole, so that the gravity center of a bearing group formed by a plurality of combined bearings can be positioned on the central axis of the eccentric hole, and therefore, in the work process, a crank pin of a crank can be directly inserted into the eccentric hole to drive the bearing group to move.

And thirdly, the middle body with the eccentric hole is symmetrically provided with two positioning pin holes, one end of each positioning pin hole is provided with a clamping ring groove, two or more combined bearings are prevented from being combined, and the positioning pin penetrates into the positioning pin holes to prevent falling off.

Application scenario one

The bearing set 100 is used in a 4X-70 compressor, the compressor is a single-throw crankshaft, the bearing set 100 is arranged on a crank pin of the compressor, a double-acting piston is arranged on each bearing outer ring, and cylinders are distributed at an angle of 90 degrees to form an X-type 4-cylinder compressor. The compressor employs the bearing set 100 of the present application, and the bearing set 100 acts as a double circular slider set. And the combined bearing combines an intermediate body with an eccentric hole, a bearing outer ring and a bearing inner ring into one component, replaces the functions of three components of a round slide block and two bearings in the prior art, reduces the number of parts, improves the weak link of the mechanism and reduces the problem of mechanism faults.

Application scenario two

The bearing set 100 is used in an 8X-110 compressor which is a double-throw crankshaft, a bearing set 100 is arranged on a crank pin of each throw, a double-acting piston is arranged on an outer ring of each bearing, and the double-acting piston is similar to the superposition of two 4X-70 compressors to form an 8X type 8 cylinder compressor. The compressor employs the bearing set 100 of the present application, and the bearing set 100 acts as a double circular slider set. And the combined bearing combines an intermediate body with an eccentric hole, a bearing outer ring and a bearing inner ring into one component, replaces the functions of three components of a round slide block and two bearings in the prior art, reduces the number of parts, improves the weak link of the mechanism and reduces the problem of mechanism faults.

Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the claims that follow.

Claims

1. A composite bearing, comprising: the bearing comprises a bearing outer ring, a bearing inner ring, an intermediate body with an eccentric hole and a roller;

the bearing outer ring is positioned on the outer side of the intermediate body with the eccentric hole, and rollers are distributed between the bearing outer ring and the intermediate body with the eccentric hole;

the bearing inner ring is positioned on the inner side of the eccentric hole of the intermediate body, and rollers are distributed between the bearing inner ring and the eccentric hole.

2. The combination bearing of claim 1, wherein the intermediate body comprises two positioning pin holes penetrating through the intermediate body in the axial direction, and the two positioning pin holes are axially and symmetrically distributed on two sides of the eccentric hole along a connecting line between the center of the eccentric hole and the center of the intermediate body.

3. The composite bearing of claim 2, wherein the intermediate body further comprises: removing the heavy structure;

the weight removing structure and the eccentric hole are arranged opposite to each other in the middle body;

the positioning pin hole and the eccentric hole are arranged on the same side in the intermediate body.

4. The combination bearing of claim 3, wherein the deduplication structure comprises: the fan-shaped groove and the weight-removing holes distributed in the fan-shaped groove;

the weight-removing holes comprise a first group of weight-removing holes and a second group of weight-removing holes, and the first group of weight-removing holes and the second group of weight-removing holes are symmetrically distributed in the fan-shaped groove by respectively taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center;

the first group of the weight-removing holes are closer to the center line position formed by the connecting line of the center of the eccentric hole and the center of the middle body than the second group of the weight-removing holes, and the inner diameter of the first group of the weight-removing holes is larger than that of the second group of the weight-removing holes.

5. The combination bearing of claim 3, wherein the deduplication structure comprises: the fan-shaped groove and the two weight-removing holes distributed in the fan-shaped groove are formed in the outer wall of the fan-shaped groove;

the two weight-removing holes are symmetrically distributed in the fan-shaped groove by taking a connecting line of the center of the eccentric hole and the center of the intermediate body as a center; and the two weight-removing holes are positioned in the fan-shaped groove and far away from the central line position formed by a connecting line of the center of the eccentric hole and the center of the circular sliding block.

6. A bearing group comprises two combined bearings, positioning pin holes corresponding to each other are arranged on the middle bodies with eccentric holes of the combined bearings adjacent to each other,

through the locating pin that inserts the locating pin hole, adjacent combination bearing obtains location each other, and the axis of the bearing inner race of adjacent combination bearing is located same straight line, and the bearing outer lane phase place of the combination bearing adjacent to each other is 180 degrees settings, and the axis symmetry set up in the axis both sides of bearing inner race.

7. A bearing group is characterized by comprising a first combined bearing, a second combined bearing and a third combined bearing;

the first combined bearing and the second combined bearing are respectively and symmetrically distributed on two sides of the third combined bearing, and the bearing inner ring of the first combined bearing, the bearing inner ring of the second combined bearing and the central axis of the bearing inner ring of the third combined bearing are positioned on the same straight line;

the first combination bearing, the second combination bearing with all be provided with the locating pin hole that corresponds each other on the third combination bearing, through inserting the locating pin of locating pin hole, adjacent combination bearing obtains location each other, and the bearing inner race phase place of adjacent combination bearing is 180 degrees settings, and the axis symmetry set up in the axis both sides of bearing inner race, the bearing inner race of first combination bearing with the axis of the bearing inner race of second combination bearing is located same straight line.

8. An internal combustion engine, characterized in that it uses a combination bearing according to any one of claims 1-5, and/or a bearing set according to any one of claims 6, and/or a bearing set according to any one of claims 7.

9. A compressor, characterized in that it uses a combined bearing according to any one of claims 1 to 5, and/or a bearing set according to any one of claims 6, and/or a bearing set according to any one of claims 7.

10. An embolic pump using a combination bearing according to any of claims 1-5, and/or a bearing set according to any of claims 6, and/or a bearing set according to any of claims 7.