Vacuum and recovery all-in-one machine

Abstract

The utility model belongs to the technical field of refrigeration maintenance equipment, in particular to a vacuum and recovery all-in-one machine, which comprises a motor, and two ends of an output shaft of the motor are respectively connected with a rotor shaft of a vacuum pump and a compressor crankshaft of a recovery machine through one-way bearings. The one-way bearing comprises a bearing outer ring, a bearing inner ring arranged on the output shaft in a sleeving mode and a roller pin arranged between the bearing outer ring and the bearing inner ring, the end of the bearing outer ring extends outwards to form a linkage end, and a rotor shaft of the vacuum pump or a crankshaft of the compressor is connected with the linkage end on the corresponding side in an inserted mode and is matched with the linkage end on the corresponding side in a synchronous rotating mode. According to the one-way bearing, the coupling function is reasonably integrated on the basis of the structure of the one-way bearing, so that one-way linkage can be realized only by arranging the one-way bearing between the output shaft of the motor and the rotor shaft of the vacuum pump or the crankshaft of the compressor.

Description

Technical fields:

[0001] This utility model belongs to the field of refrigeration maintenance equipment technology, specifically referring to a vacuum and recovery integrated machine. Background technology:

[0002] The existing Chinese invention patent (authorization announcement number CN109630376B) discloses an integrated structure of a vacuum pump and a recovery machine, which includes a motor. The output shaft of the motor extends to both ends, and the two ends of the output shaft are connected to the rotor shaft of the vacuum pump and the crankshaft of the compressor on the recovery machine via one-way clutch bearings. When the output shaft rotates in a different direction, one end of the output shaft drives the corresponding vacuum pump or compressor to rotate synchronously, while the other end separates from the corresponding vacuum pump or compressor. Furthermore, each end of the output shaft has a bearing housing, and the one-way clutch bearing is embedded and fixed within the bearing housing. The rotor shaft and crankshaft are mated and inserted into the central hole of the one-way clutch bearing. This structure requires the bearing housing, which rotates synchronously with the output shaft, as a support for the one-way clutch bearing. Additionally, a compressor end spindle and coupling are required between the compressor crankshaft and the one-way clutch bearing, resulting in an overly complex overall structure, a large number of required parts, and high cost. Summary of the Invention:

[0003] The purpose of this invention is to provide a vacuum and recovery integrated machine with a simple structure, stable operation and low cost. By reasonably integrating the coupling function on the basis of the one-way bearing structure, the output shaft of the motor and the rotor shaft of the vacuum pump or the crankshaft of the compressor can achieve one-way linkage by simply configuring the one-way bearing designed in this invention.

[0004] This utility model is implemented as follows:

[0005] A vacuum and recovery integrated machine includes a motor. The two ends of the motor's output shaft are connected to the rotor shaft of a vacuum pump and the crankshaft of a recovery machine respectively through one-way bearings. When the rotation direction of the motor's output shaft changes, one end of the output shaft rotates synchronously with the rotor shaft of the vacuum pump or the crankshaft of the compressor, while the other end of the output shaft is disengaged from the crankshaft of the compressor or the rotor shaft of the vacuum pump. The one-way bearing includes an outer bearing ring, an inner bearing ring sleeved on the output shaft, and needle rollers disposed between the outer bearing ring and the inner bearing ring. The end of the outer bearing ring extends outward to form a linkage end. The rotor shaft of the vacuum pump or the crankshaft of the compressor is inserted into and rotates synchronously with the corresponding linkage end.

[0006] In the aforementioned vacuum and recycling integrated machine, the outer ring of the bearing and the linkage end form a shaft structure, and the corresponding end of the inner ring of the outer ring of the bearing is sealed by the linkage end to form a closed structure.

[0007] In the aforementioned vacuum and recovery integrated machine, the end of the output shaft extends outward along its axial direction to form a small diameter portion, and the inner wall of the outer ring of the bearing is radially recessed inward to form a small ring portion corresponding to the position of the small diameter portion. The small diameter portion and the small ring portion are rotatably engaged by a rolling bearing.

[0008] In the aforementioned vacuum and recycling integrated machine, one end of the output shaft is tightly fitted and fixed to the inner ring of the bearing, and a fitting bushing is provided between the other end of the output shaft and the inner ring of the bearing. The fitting bushing is tightly fitted and fixed to the inner ring of the bearing, and the corresponding end of the output shaft is inserted into and axially slides in the fitting bushing. The inner ring wall of the fitting bushing is provided with a fitting through groove along its axial direction, and the outer wall of the corresponding end of the output shaft is provided with a spline groove. A spline block is provided between the fitting through groove and the spline groove.

[0009] In the above-mentioned vacuum and recovery integrated machine, the fitting structure between the rotor shaft of the vacuum pump or the crankshaft of the compressor and the linkage end is as follows: the end face of the linkage end is provided with a linkage hole along its axial direction, the linkage hole is provided with an internal thread, and the rotor shaft of the vacuum pump or the crankshaft of the compressor is provided with an external thread that fits with the internal thread.

[0010] Alternatively, a slot may be provided on the end face of the linkage end, and a protrusion may be provided on the end face of the rotor shaft of the vacuum pump or the crankshaft of the compressor that can be axially inserted into the slot.

[0011] The outstanding advantages of this utility model compared to the prior art are:

[0012] This utility model has a simple overall structure, few parts, stable transmission and low cost. By reasonably integrating the coupling function on the basis of the one-way bearing structure, the output shaft of the motor and the rotor shaft of the vacuum pump or the crankshaft of the compressor can achieve one-way linkage by simply configuring the one-way bearing designed in this utility model. Attached image description:

[0013] Figure 1 This is a cross-sectional view of the overall structure of this utility model.

[0014] In the diagram: 1. Motor; 2. Output shaft; 3. Rotor shaft; 4. Crankshaft; 5. Bearing outer ring; 6. Bearing inner ring; 7. Linkage end; 8. Rolling bearing; 9. Fitting bushing; 10. Fitting through groove; 11. Spline groove; 12. Linkage hole; 13. Straight protrusion. Detailed implementation method:

[0015] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 :

[0016] A vacuum and recovery integrated machine includes a motor 1. The output shaft 2 of the motor 1 is connected to the rotor shaft 3 of a vacuum pump and the crankshaft 4 of a compressor of the recovery machine at both ends through one-way bearings. When the rotation direction of the output shaft 2 of the motor 1 changes, one end of the output shaft 2 rotates synchronously with the rotor shaft 3 of the vacuum pump or the crankshaft 4 of the compressor, and the other end of the output shaft 2 is disengaged from the crankshaft 4 of the compressor or the rotor shaft 3 of the vacuum pump. The one-way bearing includes an outer bearing ring 5, an inner bearing ring 6 sleeved on the output shaft 2, and a needle roller disposed between the outer bearing ring 5 and the inner bearing ring 6. The end of the outer bearing ring 5 extends outward to form a linkage end 7. The rotor shaft 3 of the vacuum pump or the crankshaft 4 of the compressor is inserted into and rotates synchronously with the linkage end 7 on the corresponding side.

[0017] This utility model has a simple overall structure, few parts, stable transmission and low cost. By reasonably integrating the coupling function on the basis of the one-way bearing structure, the output shaft 2 of the motor 1 and the rotor shaft 3 of the vacuum pump or the crankshaft 4 of the compressor can achieve one-way linkage by simply configuring the one-way bearing designed in this utility model.

[0018] In this embodiment, the outer ring 5 of the bearing and the linkage end 7 can form a tubular structure. However, considering the overall support strength of the outer ring 5 of the bearing, the outer ring 5 of the bearing and the linkage end 7 form a shaft structure, and the corresponding end of the inner ring of the outer ring 5 of the bearing is blocked by the linkage end 7 to form a closed structure.

[0019] To improve the rotational stability of the upper output shaft 2 within the outer ring 5 of the bearing, the end of the output shaft 2 extends outward along its axial direction to form a small-diameter portion. The inner wall of the outer ring 5 is radially recessed inward to form a small ring portion corresponding to the position of the small-diameter portion. The small-diameter portion and the small ring portion are rotatably engaged by a rolling bearing 8. Correspondingly, the design of the small ring portion within the outer ring 5 also creates a positioning step on the inner wall surface of the outer ring 5. The inner ring 6 and the needle rollers can abut against the positioning step to achieve axial positioning of both within the outer ring 5.

[0020] Furthermore, considering that the two ends of the output shaft 2 of the motor 1 are linked to the rotor shaft 3 of the vacuum pump and the crankshaft 4 of the compressor respectively, one end of the output shaft 2 of the motor 1 should be tightly fitted and the other end should be loosely fitted. Therefore, in this embodiment, one end of the output shaft 2 is tightly fitted and fixed to the inner ring 6 of the bearing, and a fitting bushing 9 is provided between the other end of the output shaft 2 and the inner ring 6 of the bearing. The fitting bushing 9 is tightly fitted and fixed to the inner ring 6 of the bearing, and the corresponding end of the output shaft 2 is inserted and axially slides in the fitting bushing 9. The inner ring wall of the fitting bushing 9 is provided with a fitting through groove 10 along its axial direction, and the outer wall of the corresponding end of the output shaft 2 is provided with a spline groove 11. A spline block is provided between the fitting through groove 10 and the spline groove 11.

[0021] Furthermore, in this embodiment, the fitting structure between the compressor crankshaft 4 and the linkage end 7 is as follows: the end face of the linkage end 7 is provided with a linkage hole 12 along its axial direction, the linkage hole 12 is provided with an internal thread, and the rotor shaft 3 of the vacuum pump or the compressor crankshaft 4 is provided with an external thread that fits with the internal thread.

[0022] The fitting structure between the rotor shaft 3 of the vacuum pump and the linkage end 7 is as follows: a through groove is opened on the end face of the linkage end 7, and a protrusion 13 that can be axially inserted into the through groove is provided on the end face of the rotor shaft 3 of the vacuum pump or the crankshaft 4 of the compressor.

[0023] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A vacuum and recovery integrated machine, comprising a motor (1), wherein the two ends of the output shaft (2) of the motor (1) are respectively connected to the rotor shaft (3) of a vacuum pump and the crankshaft (4) of a recovery machine via one-way bearings, and when the rotation direction of the output shaft (2) of the motor (1) changes, one end of the output shaft (2) rotates synchronously with the rotor shaft (3) of the vacuum pump or the crankshaft (4) of the compressor, and the other end of the output shaft (2) is disengaged from the crankshaft (4) of the compressor or the rotor shaft (3) of the vacuum pump, characterized in that: The one-way bearing includes an outer bearing ring (5), an inner bearing ring (6) sleeved on the output shaft (2), and a needle roller disposed between the outer bearing ring (5) and the inner bearing ring (6). The end of the outer bearing ring (5) extends outward to form a linkage end (7). The rotor shaft (3) of the vacuum pump or the crankshaft (4) of the compressor is inserted into the linkage end (7) on the corresponding side and rotates synchronously. The fitting structure between the rotor shaft (3) of the vacuum pump or the crankshaft (4) of the compressor and the linkage end (7) is as follows: the end face of the linkage end (7) is provided with a linkage hole (12) along its axial direction, the linkage hole (12) is provided with an internal thread, and the rotor shaft (3) of the vacuum pump or the crankshaft (4) of the compressor is provided with an external thread that fits with the internal thread. A slot is provided on the end face of the linkage end (7), and a protrusion (13) that can be axially inserted into the slot is provided on the end face of the rotor shaft (3) of the vacuum pump or the crankshaft (4) of the compressor.

2. The vacuum and recovery integrated machine according to claim 1, characterized in that: The outer ring (5) of the bearing and the linkage end (7) form a shaft structure, and the inner ring of the outer ring (5) is blocked by the linkage end (7) to form a closed structure.

3. A vacuum and recycling integrated machine according to claim 1 or 2, characterized in that: The end of the output shaft (2) extends outward along its axial direction to form a small diameter portion, and the inner wall of the bearing outer ring (5) is recessed inward along the radial direction to form a small ring portion corresponding to the position of the small diameter portion. The small diameter portion and the small ring portion are rotated and engaged by a rolling bearing (8).

4. The vacuum and recycling integrated machine according to claim 1, characterized in that: One end of the output shaft (2) is tightly fitted to the inner ring (6) of the bearing, and a fitting sleeve (9) is provided between the other end of the output shaft (2) and the inner ring (6) of the bearing. The fitting sleeve (9) is tightly fitted to the inner ring (6) of the bearing, and the corresponding end of the output shaft (2) is inserted and axially slides in the fitting sleeve (9). The inner ring wall of the fitting sleeve (9) is provided with a fitting through groove (10) along its axial direction, and the outer wall of the corresponding end of the output shaft (2) is provided with a spline groove (11). A spline block is provided between the fitting through groove (10) and the spline groove (11).

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