阅读说明：本技术 曲柄连杆组件、压缩机及制冷设备 (Crank connecting rod assembly, compressor and refrigeration equipment ) 是由 黄刚 沈雪豹 于 2018-08-30 设计创作，主要内容包括：本发明公开了一种曲柄连杆组件、压缩机及制冷设备,曲柄连杆组件的曲轴部件的偏心轴靠近主轴的一端的外部设置有第一螺纹；轴套部件在其内轴环的下端处设置有与第一螺纹相匹配的第二螺纹,轴套部件在外轴环的上端处设置有第三螺纹；连杆部件包括具有通孔的连杆,连杆的通孔的上端处设置有与第三螺纹匹配的第四螺纹；偏心轴套设在内轴环中并使第一螺纹与第二螺纹连接,外轴环套设在连杆的通孔中并使第三螺纹与第四螺纹连接,并且,第一螺纹与第二螺纹的旋紧方向和第三螺纹与第四螺纹的旋紧方向相反。本发明的该曲柄连杆组件能够在正反转时使活塞的行程发生变化,从而能够满足压缩机的变容量工作的要求。(The invention discloses a crank connecting rod assembly, a compressor and refrigeration equipment.A first thread is arranged outside one end, close to a main shaft, of an eccentric shaft of a crank part of the crank connecting rod assembly; the lower end of the inner shaft ring of the shaft sleeve component is provided with a second thread matched with the first thread, and the upper end of the outer shaft ring of the shaft sleeve component is provided with a third thread; the connecting rod part comprises a connecting rod with a through hole, and a fourth thread matched with the third thread is arranged at the upper end of the through hole of the connecting rod; the eccentric shaft is sleeved in the inner shaft ring and enables the first thread to be connected with the second thread, the outer shaft ring is sleeved in the through hole of the connecting rod and enables the third thread to be connected with the fourth thread, and the screwing direction of the first thread and the second thread is opposite to the screwing direction of the third thread and the fourth thread. The crank connecting rod assembly can change the stroke of the piston during positive and negative rotation, so that the requirement of variable capacity work of the compressor can be met.)

1. A crank link assembly, the crank link assembly comprising:

the crankshaft component comprises a main shaft (11) and an eccentric shaft (12) which is arranged eccentrically to the main shaft (11), and a first thread (A) is arranged on the outer portion of one end, close to the main shaft (11), of the eccentric shaft (12);

a bushing member comprising an outer collar (21) and an inner collar (22) eccentrically arranged in the outer collar (21), the bushing member being provided with a second thread (B) matching the first thread (A) below the inner collar (22), the bushing member being provided with a third thread (C) above the outer collar (21); and

the connecting rod part comprises a connecting rod (31) with a through hole for connecting the shaft sleeve part, a fourth thread (D) matched with the third thread (C) is arranged above the through hole of the connecting rod (31), and a connecting hole for connecting a piston is formed in the connecting rod (31);

wherein the eccentric shaft (12) is fitted in the inner collar (22) and connects the first thread (A) with the second thread (B), the outer collar (21) is fitted in the through hole of the connecting rod (31) and connects the third thread (C) with the fourth thread (D), and the screwing direction of the first thread (A) with the second thread (B) and the screwing direction of the third thread (C) with the fourth thread (D) are opposite.

2. The crank link assembly according to claim 1, characterized in that the bushing member comprises an eccentric ring comprising a cylindrical eccentric ring body (23), the eccentric ring body (23) being provided with an eccentric hole (231) eccentrically arranged to the axis of the outer circumference of the eccentric ring body (23), the inner collar (22) being fixedly arranged in the eccentric hole (231), the eccentric ring body (23) being fixedly arranged in the outer collar (21).

3. Crank-link assembly according to claim 2, characterized in that one of the inner wall of the eccentric bore (231) and the outer wall of the inner collar (22) is provided with a first projection in axial direction and the other is provided with a first recess in axial direction, which cooperates with the first projection, and one of the outer wall of the eccentric ring body (23) and the inner wall of the outer collar (21) is provided with a second projection in axial direction and the other is provided with a second recess in axial direction, which cooperates with the second projection.

4. The crank link assembly according to claim 2, characterized in that the bushing member comprises a first thread plate (24) and a second thread plate (25), the shape of the cross section of the first thread plate (24) and the second thread plate (25) each corresponding to the shape of the cross section of the eccentric ring body (23), the inner side wall of the first thread plate (24) having the second thread (B), the outer side wall of the second thread plate (25) having the third thread (C), the first thread plate (24) and the second thread plate (25) being respectively provided at the lower end face and the upper end face of the eccentric ring body (23) such that the second thread (B) is located at the lower end of the inner collar (22) and the third thread (C) is located at the upper end of the outer collar (21).

5. The crank link assembly according to claim 4, wherein the inner collar (22) and the eccentric ring body (23) have the same height, the eccentric ring body (23), the first thread plate (24), and the second thread plate (25) each have a corresponding pin hole, and the eccentric ring body (23), the first thread plate (24), and the second thread plate (25) are detachably connected by a pin.

6. Crank-link assembly according to claim 5, characterized in that the lower end face of the outer collar (21) is flush with the lower end face of the first thread plate (24), the upper end face of the outer collar (21) being flush with the lower end face of the second thread plate (25).

7. The crank-link assembly according to claim 1, characterized in that the crankshaft part comprises a crank (13) and a crankshaft thrust plate (14), the eccentric shaft (12) and the main shaft (11) are respectively arranged on two opposite end faces of the crank (13), the crankshaft thrust plate (14) is sleeved on the eccentric shaft (12) and is provided with the first thread (a) on the outer side wall thereof, and the crank (13) and the crankshaft thrust plate (14) are respectively provided with corresponding pin holes so that the crank (13) and the crankshaft thrust plate (14) are detachably connected by a pin.

8. The crank-link assembly according to claim 1, wherein the link member includes a link thrust plate (32), the link thrust plate (32) has a through hole having the same shape as the through hole of the link (31), the inner side wall of the through hole of the link thrust plate (32) has the fourth thread (D), and both the link thrust plate (32) and the link (31) are provided with pin holes so that the link thrust plate (32) and the link (31) are detachably connected by a pin.

9. A compressor, characterized in that it comprises a crank-link assembly according to any one of claims 1 to 8.

10. A refrigeration appliance, characterized in that it comprises a compressor according to claim 9.

Technical Field

The invention relates to the technical field of compressors, in particular to a crank connecting rod assembly, a compressor and refrigeration equipment.

Background

The totally-enclosed reciprocating type refrigeration compressor is a core component of refrigeration equipment such as a refrigerator and a freezer, the reciprocating type refrigeration compressor is used as a heart of the refrigeration equipment, the energy conservation of the refrigeration equipment is mainly to reduce the energy consumption of the reciprocating type refrigeration compressor, and the totally-enclosed reciprocating type variable-capacity refrigeration compressor is used as a novel energy-saving compressor with high cost performance and is favored by consumers. The totally-enclosed reciprocating variable-capacity refrigeration compressor is realized by the change of a crank connecting rod assembly driven by the positive rotation and the negative rotation of the compressor, and the design of the crank connecting rod assembly of the compressor needs to meet the change of the stroke of a piston when the compressor rotates positively and negatively so as to realize the variable-capacity work of the reciprocating refrigeration compressor. However, in the conventional compressor, when the compressor is rotating forward and backward, the stroke of the piston is not changed, which cannot meet the requirement of the variable capacity operation of the compressor.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a crank connecting rod assembly, a compressor and refrigeration equipment.

In order to achieve the above object, an aspect of the present invention provides a crank link assembly including: the crankshaft component comprises a main shaft and an eccentric shaft eccentrically arranged with the main shaft, and a first thread is arranged outside one end of the eccentric shaft close to the main shaft; a bushing member including an outer collar and an inner collar eccentrically disposed within the outer collar, the bushing member being provided with a second thread matching the first thread below the inner collar, the bushing member being provided with a third thread above the outer collar; the connecting rod part comprises a connecting rod with a through hole for connecting the shaft sleeve part, a fourth thread matched with the third thread is arranged above the through hole of the connecting rod, and a connecting hole for connecting a piston is formed in the connecting rod; the eccentric shaft is sleeved in the inner shaft ring and enables the first threads to be connected with the second threads, the outer shaft ring is sleeved in the through hole of the connecting rod and enables the third threads to be connected with the fourth threads, and the screwing directions of the first threads and the second threads are opposite to the screwing directions of the third threads and the fourth threads.

Preferably, the shaft sleeve member includes an eccentric ring including a cylindrical eccentric ring body provided with an eccentric hole eccentrically disposed with respect to an axis of an outer circumference of the eccentric ring body, the inner collar is fixedly disposed in the eccentric hole, and the eccentric ring body is fixedly disposed in the outer collar.

Preferably, one of the inner wall of the eccentric hole and the outer wall of the inner collar is provided with a first protrusion along the axial direction, the other one of the inner wall of the eccentric hole and the outer wall of the inner collar is provided with a first groove matched with the first protrusion along the axial direction, one of the outer wall of the eccentric ring body and the inner wall of the outer collar is provided with a second protrusion along the axial direction, and the other one of the outer wall of the eccentric ring body and the inner wall of the outer collar is provided with a second groove matched with the second protrusion along the axial direction.

Preferably, the bushing member includes a first thread plate and a second thread plate each having a cross-sectional shape corresponding to a cross-sectional shape of the eccentric ring body, an inner side wall of the first thread plate having the second threads, and an outer side wall of the second thread plate having the third threads, the first thread plate and the second thread plate being disposed at a lower end surface and an upper end surface of the eccentric ring body, respectively, such that the second threads are located at a lower end of the inner collar and the third threads are located at an upper end of the outer collar.

Preferably, the inner collar and the eccentric ring body have the same height, the eccentric ring body, the first thread plate and the second thread plate are respectively provided with a corresponding pin hole, and the eccentric ring body, the first thread plate and the second thread plate are detachably connected through a pin.

Preferably, a lower end face of the outer collar is flush with a lower end face of the first thread plate, and an upper end face of the outer collar is flush with a lower end face of the second thread plate.

Preferably, the crankshaft part comprises a crank and a crankshaft thrust plate, the eccentric shaft and the main shaft are respectively arranged on two opposite end surfaces of the crank, the crankshaft thrust plate is sleeved on the eccentric shaft and provided with the first thread on the outer side wall thereof, and the crank and the crankshaft thrust plate are respectively provided with corresponding pin holes so that the crank and the crankshaft thrust plate can be detachably connected through a pin.

Preferably, the connecting rod part includes a connecting rod thrust plate, the connecting rod thrust plate has a through hole with the same shape as the through hole of the connecting rod, the inner side wall of the through hole of the connecting rod thrust plate has the fourth thread, and the connecting rod thrust plate and the connecting rod are both provided with pin holes, so that the connecting rod thrust plate and the connecting rod are detachably connected through a pin.

In a second aspect, the invention provides a compressor comprising the crank and link assembly described above.

The invention also provides refrigeration equipment which comprises the compressor.

Through the technical scheme, when the connecting rod component is used, the shaft sleeve component is sleeved on the eccentric shaft of the crankshaft component, the second thread at one end of the shaft sleeve component is connected with the first thread outside the eccentric shaft, the third thread at the other end of the shaft sleeve component is connected with the fourth thread of the connecting rod component, and the screwing direction of the first thread and the second thread is opposite to that of the third thread and the fourth thread, so that when the shaft sleeve component and the eccentric shaft are screwed mutually, the shaft sleeve component and the connecting rod component are unscrewed mutually, the connecting rod component cannot move along the axial direction of the connecting rod component, and a piston connected with the connecting rod component can stably reciprocate. When the bushing component and the eccentric shaft are screwed with each other, because the inner collar of the bushing component is eccentrically arranged in the outer collar, two points on the edge of the outer collar, which are closest to and farthest from the inner collar, can do circular motion by taking the axis of the eccentric shaft as the center: when the farthest point moves to the farthest position from the axis of the main shaft, the connecting rod part connected to the bushing part has the largest stroke or the smallest stroke (depending on whether the farthest position is away from the piston or close to the piston). Therefore, the stroke of the piston can be changed when the crank connecting rod assembly rotates forwards and backwards, and the requirement of variable capacity work of the compressor can be met.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of the crank and connecting rod assembly of the present invention;

FIG. 2 is a schematic structural view of a crankshaft component of the crank link assembly of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a schematic view of the bushing component of the crank and connecting rod assembly of the present invention;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a schematic structural view of a connecting rod component of the crank and connecting rod assembly of the present invention;

fig. 7 is an exploded view of fig. 6.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in FIGS. 1-7, the crank and connecting rod assembly of the present invention includes a crankshaft member, a bushing member, and a connecting rod member. The crankshaft component comprises a main shaft 11 and an eccentric shaft 12 which is arranged eccentrically to the main shaft 11, and a first thread A is arranged on the outer portion of one end, close to the main shaft 11, of the eccentric shaft 12. The bushing member comprises an outer collar 21 and an inner collar 22 arranged eccentrically in the outer collar 21, the bushing member being provided with a second thread B matching the first thread a below the inner collar 22, the bushing member being provided with a third thread C above the outer collar 21. The connecting rod part comprises a connecting rod 31 with a through hole for connecting the shaft sleeve part, a fourth thread D matched with the third thread C is arranged above the through hole of the connecting rod 31, and a connecting hole for connecting a piston is arranged on the connecting rod 31. The eccentric shaft 12 is sleeved in the inner collar 22 and connects the first thread a with the second thread B, the outer collar 21 is sleeved in the through hole of the connecting rod 31 and connects the third thread C with the fourth thread D, and the screwing directions of the first thread a and the second thread B are opposite to the screwing directions of the third thread C and the fourth thread D.

In operation, the sleeve member is fitted over the eccentric shaft 12 of the crankshaft member, and the second thread B at one end of the sleeve member is connected to the first thread a outside the eccentric shaft 12, and the third thread C at the other end of the sleeve member is connected to the fourth thread D of the connecting rod member, and since the screwing direction of the first thread a and the second thread B is opposite to the screwing direction of the third thread C and the fourth thread D, the sleeve member and the connecting rod member are unscrewed from each other when the sleeve member and the eccentric shaft 12 are screwed to each other, thereby ensuring that the connecting rod member does not move in the axial direction thereof, and also enabling the piston connected to the connecting rod member to stably reciprocate. When the bushing member and the eccentric shaft 12 are screwed together, the inner collar 22 of the bushing member is eccentrically disposed in the outer collar 21, and therefore, two points on the edge of the outer collar 21 closest to and farthest from the inner collar 22 are circularly moved around the axis of the eccentric shaft 12: when the furthest point moves to the furthest point from the axis of the main shaft 11, the connecting rod part to which the bushing part is connected will have the largest or smallest stroke (depending on whether the furthest point is further from or closer to the piston). Therefore, the stroke of the piston can be changed when the crank connecting rod assembly rotates forwards and backwards, and the requirement of variable capacity work of the compressor can be met.

In order to facilitate adjustment of the eccentric amount of the bushing member, it is preferable that, as shown in fig. 4 and 5, the bushing member includes an eccentric ring including a cylindrical eccentric ring body 23, the eccentric ring body 23 is provided with an eccentric hole 231 eccentrically disposed from an axis of an outer circumference of the eccentric ring body 23, the inner collar 22 is fixedly disposed in the eccentric hole 231, and the eccentric ring body 23 is fixedly disposed in the outer collar 21. Thus, the eccentric amount of the sleeve member can be changed only by changing the eccentric amount of the eccentric hole 231 of the eccentric ring body 23, that is, the purpose of changing the eccentric amount of the sleeve member can be achieved by replacing the eccentric ring having different eccentric amounts, and the operation is simple and easy.

In order to conveniently mount the eccentric ring, the inner collar 22 and the outer collar 21 together and also facilitate the replacement of the eccentric ring, it is preferable that one of the inner wall of the eccentric hole 231 and the outer wall of the inner collar 22 is provided with a first protrusion in the axial direction, the other one is provided with a first groove in the axial direction, one of the outer wall of the eccentric ring body 23 and the inner wall of the outer collar 21 is provided with a second protrusion in the axial direction, and the other one is provided with a second groove in the axial direction, the second groove being engaged with the second protrusion. That is, the eccentric ring, the inner collar 22 and the outer collar 21 are not circumferentially rotated relative to each other by the cooperation of the first protrusion and the first groove and the cooperation of the second protrusion and the second groove.

It should be understood that the second thread B and the third thread C may be provided on the eccentric ring, but in use, the threads may be worn, and in order to enable timely and convenient replacement of the worn threads, it is preferable that the bushing member includes a first thread plate 24 and a second thread plate 25, the cross-sectional shapes of the first thread plate 24 and the second thread plate 25 are identical to the cross-sectional shape of the eccentric ring body 23, the inner side wall of the first thread plate 24 has the second thread B, the outer side wall of the second thread plate 25 has the third thread C, and the first thread plate 24 and the second thread plate 25 are respectively provided on the lower end surface and the upper end surface of the eccentric ring body 23 such that the second thread B is located at the lower end of the inner collar 22 and the third thread C is located at the upper end of the outer collar 21. That is, by separate components: the first and second thread plates 24 and 25 are interconnected with the eccentric ring such that the bushing member has a second thread B and a third thread C.

It should be understood that the first and second thread plates 24 and 25 may be provided on the eccentric ring body 23 in various ways, and in a preferred embodiment of the present invention, in order to facilitate replacement of the first and second thread plates 24 and 25, the inner collar 22 and the eccentric ring body 23 have the same height, the eccentric ring body 23, the first and second thread plates 24 and 25 are respectively provided with corresponding pin holes, and the eccentric ring body 23, the first and second thread plates 24 and 25 are detachably connected by pins.

In order to enable effective and quick abutment between the first and second threads a, B, C and D, the lower end face of the outer collar 21 is preferably flush with the lower end face of the first thread plate 24 and the upper end face of the outer collar 21 is preferably flush with the lower end face of the second thread plate 25. That is, the second thread B of the first thread plate 24 should have a higher level than the lowermost end of the boss part, and the third thread C of the second thread plate 25 should have a higher level than the uppermost end of the boss part.

In order to prevent the second thread B of the bushing member from being thread-locked with the first thread a of the crankshaft member, it is preferable that, as shown in fig. 2 and 3, the crankshaft member includes a crank 13 and a crank thrust plate 14, the eccentric shaft 12 and the main shaft 11 are respectively disposed on two opposite end surfaces of the crank 13, the crank thrust plate 14 is fitted over the eccentric shaft 12 and is provided with the first thread a on an outer side wall thereof, and the crank 13 and the crank thrust plate 14 are each provided with a corresponding pin hole so that the crank 13 and the crank thrust plate 14 are detachably connected by a pin.

Also, in order to prevent the third thread C of the bushing member from being thread-locked with the fourth thread D of the link member, it is preferable that, as shown in fig. 6 and 7, the link member includes a link thrust plate 32, the link thrust plate 32 has a through hole having the same shape as the through hole of the link 31, the inner side wall of the through hole of the link thrust plate 32 has the fourth thread D, and the link thrust plate 32 and the link 31 are both provided with pin holes so that the link thrust plate 32 and the link 31 are detachably connected by a pin.

According to a second aspect of the invention, a compressor is provided, which comprises the crank and connecting rod assembly. Through the change of the piston stroke of the crank connecting rod assembly, the compressor can achieve the purpose of variable capacity work.

The invention also provides refrigeration equipment which comprises the compressor.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications may be made to the technical solution of the invention, and in order to avoid unnecessary repetition, various possible combinations of the invention will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.