阅读说明：本技术 曲柄连杆机构 (Crank connecting rod mechanism ) 是由 李颖高 李东海 吕绮峰 于 2021-01-21 设计创作，主要内容包括：本发明提供了一种曲柄连杆机构,其应用于压缩机,其特征在于,包括连杆、圆柱滚子轴承和曲轴,所述圆柱滚子轴承设置在所述连杆与所述曲轴之间,所述圆柱滚子轴承与所述连杆可拆卸连接,所述圆柱滚子轴承嵌套在所述曲轴上,所述曲轴包括过渡部,所述过渡部包括键槽、弧形凹部和弧形凸部,所述弧形凸部设置在所述弧形凹部与所述键槽之间。本发明结构简单,加工方便,提高了连杆和曲轴的拆卸便利性。(The invention provides a crank connecting rod mechanism which is applied to a compressor and is characterized by comprising a connecting rod, a cylindrical roller bearing and a crankshaft, wherein the cylindrical roller bearing is arranged between the connecting rod and the crankshaft, the cylindrical roller bearing is detachably connected with the connecting rod, the cylindrical roller bearing is nested on the crankshaft, the crankshaft comprises a transition part, the transition part comprises a key groove, an arc concave part and an arc convex part, and the arc convex part is arranged between the arc concave part and the key groove. The invention has simple structure and convenient processing, and improves the convenience of disassembling the connecting rod and the crankshaft.)

1. The utility model provides a crank link mechanism, its is applied to the compressor, its characterized in that, including connecting rod, cylindrical roller bearing and bent axle, cylindrical roller bearing sets up the connecting rod with between the bent axle, cylindrical roller bearing with the connection can be dismantled to the connecting rod, cylindrical roller bearing nestification is in on the bent axle, the bent axle includes transition portion, transition portion includes keyway, arc concave part and arc convex part, the arc convex part sets up the arc concave part with between the keyway.

2. The crank-link mechanism as claimed in claim 1, wherein the connecting rod includes a big end of the connecting rod, the big end of the connecting rod is located at one end of the connecting rod close to the crankshaft, the big end of the connecting rod is provided with a through hole, and the through hole and the big end of the connecting rod are coaxially arranged.

3. The crank-link mechanism of claim 1, wherein the cylindrical roller bearing comprises a cylindrical roller, an outer bearing ring, and an inner bearing ring, the cylindrical roller is disposed between the outer bearing ring and the inner bearing ring, and the cylindrical roller is in clearance fit with the outer bearing ring and the inner bearing ring.

4. The crank-link mechanism according to claim 4, wherein the cylindrical roller bearing further comprises a circlip provided between the cylindrical roller and the crankshaft and detachably connected to the bearing inner race.

5. The crank-link mechanism according to claim 5, wherein the inner diameter of the circlip is larger than the inner diameter of the bearing inner race.

6. The crank-link mechanism of claim 1, wherein the crankshaft includes a mounting portion that is disposed perpendicular to the connecting rod and is connected to the connecting rod.

7. The crank-link mechanism of claim 6, wherein the crankshaft includes a balance portion disposed on a side of the connecting rod remote from the first transition portion.

8. The crank-link mechanism of claim 6 wherein the transition portion includes a first step disposed between the keyway and the mounting portion.

9. The crank-link mechanism of claim 7 wherein the mounting portion includes a second step disposed between the mounting portion and the balance portion.

10. A compressor employing the crank mechanism of any one of claims 1 to 9.

Technical Field

The invention relates to the field of compressors, in particular to a crank connecting rod mechanism.

Background

The connecting rod consists of a connecting rod big end, a rod body and a connecting rod small end, and a connecting rod bearing arranged in an inner hole of the big end of the connecting rod is basically in the form of a ball bearing or a bearing bush, so that the connecting rod is connected with the crankshaft. However, when the big end of the connecting rod adopts a ball bearing, in order to ensure the service life of the bearing, the clearances between the inner ring of the bearing and the crankshaft and between the outer ring of the crankshaft and the connecting rod are very small or even in interference fit, and the close fit among the connecting rod, the bearing and the crankshaft is very inconvenient for disassembly; when the big end of the connecting rod selects the bearing bush, the requirement of the bearing bush on lubrication is higher, the crankshaft structure is complicated because the holes are drilled in the center of the crankshaft and the crank pin to realize the lubrication of the bearing bush, and the connecting rod bearing bush can only bear lower rotating speed compared with a rolling bearing.

The US patent publication US1479324A discloses an improved rolling bearing for use on the big end of a connecting rod on a crank pin of a crankshaft of an internal combustion engine, while enabling the connecting rod to be manufactured in one piece, by which the connecting rod is mounted on the crank pin of the crankshaft, making it more convenient to machine and assemble parts. However, the bearing holder in this technique is a separate structure, and is not easily attached and detached when applied to the field of compressors.

Therefore, there is a need to provide a crank linkage to solve the above problems in the prior art.

Disclosure of Invention

The invention aims to provide a crank connecting rod mechanism which enables a connecting rod and a bearing to be more conveniently disassembled.

In order to achieve the purpose, the crank-link mechanism provided by the invention is applied to a compressor and comprises a connecting rod, a cylindrical roller bearing and a crankshaft, wherein the cylindrical roller bearing is arranged between the connecting rod and the crankshaft, the cylindrical roller bearing is detachably connected with the connecting rod, the cylindrical roller bearing is nested on the crankshaft, the crankshaft comprises a transition part, the transition part comprises a key groove, an arc concave part and an arc convex part, and the arc convex part is arranged between the arc concave part and the key groove.

The invention has the beneficial effects that: the cylindrical roller bearing is connected with the connecting rod and is connected with the crankshaft in a nesting mode, so that the connecting rod is convenient to detach from the crankshaft, an arc-shaped convex part and an arc-shaped concave part are arranged on the transition part of the crankshaft, and parts mounted on the key groove can be detached due to the key groove, so that the connecting rod can be conveniently detached from the crankshaft.

Furthermore, the connecting rod comprises a connecting rod big end, the connecting rod big end is positioned at one end of the connecting rod close to the crankshaft, the connecting rod big end is provided with a through hole, and the through hole and the connecting rod big end are coaxially arranged. The beneficial effects are that: the through hole is used for installing the cylindrical roller bearing on the connecting rod.

Furthermore, the cylindrical roller bearing comprises a cylindrical roller, a bearing outer ring and a bearing inner ring, wherein the cylindrical roller is arranged between the bearing outer ring and the bearing inner ring, and the cylindrical roller is in clearance fit with the bearing outer ring and the bearing inner ring. The beneficial effects are that: the bearing inner ring and the cylindrical roller are tightly matched with the connecting rod, and the bearing inner ring is used for being nested on the crankshaft.

Furthermore, the cylindrical roller bearing further comprises a flat retainer ring, and the flat retainer ring is arranged between the cylindrical roller and the crankshaft and detachably connected with the bearing inner ring. The beneficial effects are that: the position of the connecting rod on the crankshaft is fixed by the circlip, and the circlip is detachably connected with the inner ring of the bearing, so that the bearing can be better passed when the bearing is detached to the transition part.

Further, the inner diameter of the flat retainer ring is larger than that of the bearing inner ring. The beneficial effects are that: when the connecting rod is disassembled, the connecting rod and the bearing outer ring and the roller bearing which are connected with the connecting rod can be directly taken out of the circlip, so that the connecting rod is disassembled.

Further, the crankshaft comprises an installation part, and the installation part is perpendicular to the connecting rod and is connected with the connecting rod. The beneficial effects are that: the mounting portion is used for mounting the connecting rod on the crankshaft.

Further, the crankshaft includes a balance portion provided on a side of the connecting rod away from the first transition portion. The beneficial effects are that: the balance part is used for installing a balance block to keep the stability of the connecting rod during movement.

Further, the transition portion includes a first step disposed between the keyway and the mounting portion. The beneficial effects are that: the first step is configured to axially restrain a component mounted on the keyway.

Further, the mounting portion includes a second step, the second step being disposed between the mounting portion and the balance portion. The beneficial effects are that: the second step is used for axially restraining the connecting rod.

The invention also provides a compressor comprising the crank connecting rod mechanism.

The compressor of the invention has the beneficial effects that: the crank link mechanism simplifies the disassembly process of the connecting rod and the crankshaft in the compressor.

Drawings

FIG. 1 is a schematic view of a crank mechanism in one embodiment of the present invention;

FIG. 2 is a schematic illustration of the crankshaft in one embodiment of the present invention;

fig. 3 is a front view of the connecting rod assembled with the cylindrical roller bearing according to an embodiment of the present invention.

The codes in the figures are respectively:

1-a connecting rod; 11-connecting rod big end; 111-a via;

2-cylindrical roller bearings; 21-a cylindrical roller; 22-bearing outer race; 23-inner race of bearing; 24-a flat collar;

3-a crankshaft;

31-a transition; 311-arc-shaped concave part; 312-a curved protrusion; 313-a keyway; 314 — first step;

32-a mounting portion; 321-a second step;

33-a balancing section;

34-a drive end; 341-grooves;

35-a driven end; 351-screw holes;

36-a first fixed part;

37-second fixation.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

To the problems existing in the prior art, the crank link mechanism comprises a connecting rod, a cylindrical roller bearing and a crankshaft, the cylindrical roller bearing is arranged between the connecting rod and the crankshaft, the cylindrical roller bearing is detachably connected with the connecting rod, the cylindrical roller bearing is nested on the crankshaft, the crankshaft comprises a transition portion, the transition portion comprises a key groove, an arc concave portion and an arc convex portion, and the arc convex portion is arranged between the arc concave portion and the key groove.

Taking the crank link mechanism shown in fig. 1 as an example, the crank link mechanism is applied to a compressor, the crank link mechanism includes a connecting rod 1, a cylindrical roller bearing 2 and a crankshaft 3, the cylindrical roller bearing 2 is disposed between the connecting rod 1 and the crankshaft 3, the cylindrical roller bearing 2 is detachably connected with the connecting rod 1, the cylindrical roller bearing 3 is nested on the crankshaft 3, the crankshaft 3 includes a transition portion 31, the transition portion 31 includes a key groove 313, an arc-shaped concave portion 311 and an arc-shaped convex portion 312, the arc-shaped convex portion 312 is disposed between the arc-shaped concave portion 311 and the key groove 313, and the center of the arc-shaped concave portion 311 and the center of the arc-shaped convex portion 312 are located at two sides of the crankshaft 3.

In some embodiments of the present invention, as shown in fig. 1, the key groove 313 is used to detachably connect a balance weight (not shown), and the arrangement of the key groove 313 can be used to detach the balance weight (not shown) connected to the key groove 313 and then detach the connecting rod from the crankshaft 3 when detaching the connecting rod 1.

In some embodiments of the present invention, as shown in fig. 1 and fig. 3, the connecting rod 1 includes a connecting rod big end 11, the connecting rod big end 11 is located at one end of the connecting rod 1 close to the crankshaft 3, the connecting rod big end 11 is provided with a through hole 111, the through hole 111 is coaxial with the connecting rod big end 11, and the through hole 111 is used to mount the cylindrical roller bearing 2 on the connecting rod 1.

In some embodiments of the present invention, as shown in fig. 1, the cylindrical roller bearing 2 includes a cylindrical roller 21, an outer bearing ring 22, and an inner bearing ring 23, the cylindrical roller 21 is disposed between the outer bearing ring 22 and the inner bearing ring 23, the cylindrical roller 21 is in clearance fit with the outer bearing ring 22 and the inner bearing ring 23, the inner bearing ring 23 and the cylindrical roller 21 are in close fit with the connecting rod 1, and the inner bearing ring 23 is configured to be nested on the crankshaft 3.

In some embodiments of the present invention, as shown in fig. 1, the cylindrical roller bearing 2 further includes a flat retainer ring 24, the flat retainer ring 24 is disposed between the cylindrical roller 21 and the crankshaft 3 and detachably connected to the inner bearing ring 23, the flat retainer ring 24 is used to fix the position of the connecting rod 1 on the crankshaft 3, and since the flat retainer ring 24 is detachably connected to the inner bearing ring 23, it is possible to have better passing ability when the cylindrical roller bearing 2 is detached to the transition portion 31.

In some embodiments of the present invention, as shown in fig. 1, the inner diameter of the circlip 24 is larger than the inner diameter of the bearing inner ring 23, when the connecting rod 1 is disassembled, the circlip 24 may be directly taken out, and then the connecting rod 1, the bearing outer ring 22 connected to the connecting rod 1, and the cylindrical rollers 21 may be removed, because the inner diameter of the circlip 24 is larger than the inner diameter of the bearing inner ring 23, when the bearing inner ring 23 is tightly fitted to the crankshaft 3, a gap may exist between the circlip 24 and the crankshaft 3.

In some embodiments of the present invention, as shown in fig. 1, the crankshaft 3 includes a mounting portion 32, the mounting portion 32 is disposed perpendicular to the connecting rod 1 and is connected to the connecting rod 1, and the mounting portion 32 is configured to mount the connecting rod 1 on the crankshaft 3.

In some embodiments of the present invention, as shown in fig. 1, the crankshaft 3 includes a balance portion 33, the balance portion 33 is disposed on a side of the connecting rod 1 away from the transition portion 31, and the balance portion 33 is used for installing a balance weight 331 to maintain stability of the connecting rod 1 during movement.

In other embodiments, as shown in fig. 2, the crankshaft 3 further includes a first fixing portion 36 and a second fixing portion 37, and the first fixing portion 36 and the second fixing portion 37 are configured to fix the crankshaft 3 to the compressor (not shown).

In some embodiments of the present invention, as shown in fig. 1 and 2, the transition portion 31 includes a first step 314, the first step 314 is disposed between the key groove 313 and the mounting portion 32, and the first step 314 is used for axially restraining a component mounted on the key groove 313.

In some embodiments of the present invention, as shown in fig. 1 and 2, the mounting portion 32 includes a second step 321, the second step 321 is disposed between the mounting portion 32 and the balance portion 33, and the second step 315 axially constrains the connecting rod 1.

Preferably, as shown in fig. 2, both ends of the crankshaft 3 are further provided with a driving end 34 and a driven end 35, the driving end 34 provides power output for the linkage device, and the driven end 35 is used for connecting with a driving device.

Preferably, as shown in fig. 1 and fig. 2, the driving end 34 is further provided with a groove 341, and the groove 341 is used for connecting a linkage device to transmit the mechanical power of the crankshaft 3 to the linkage device.

Preferably, as shown in fig. 1 and 2, the driven end 35 is provided with a screw hole 351, and the screw hole 351 is used for connecting a driving device through a bolt so as to transmit the mechanical power of the driving device to the crankshaft 3.

In some embodiments of the present invention, the crank link mechanism simplifies the disassembly process of the connecting rod 1 and the crankshaft 3 in the compressor.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.