Piston refrigeration compressor with radial fixed motor

Abstract

This utility model discloses a piston-type refrigeration compressor with a radially fixed motor, including a housing, a motor inside the housing, a stator inside the motor, a protrusion extending from the housing and connected to the stator by bolts, a threaded groove inside the bolt, a slide rod inside the threaded groove, the slide rod engaging with the stator, a push rod threadedly connected to the threaded groove and abutting against the slide rod, the push rod including a connector and a screw, the screw threadedly connected to the threaded groove, a screw groove at the top of the connector, a pressure block connected to the screw, the pressure block being conical with its diameter gradually decreasing away from the screw, a fixing block connected to the end of the slide rod, the fixing block having an arc-shaped groove matching the shape of the pressure block, the pressure block being placed in the arc-shaped groove, a fixing groove on the stator, a positioning groove on the side wall of the fixing groove, the slide rod being placed in the positioning groove, a push plate connected to a first spring inside the positioning groove abutting against the slide rod, through a linkage mechanism between the push rod and the slide rod set in the bolt, the push rod pushes the slide rod to be firmly engaged with the stator, achieving multiple locking.

Description

Technical Field

[0001] This utility model belongs to the field of compressor manufacturing technology, and in particular relates to a piston refrigeration compressor with a radially fixed motor. Background Technology

[0002] In compressor structures, the stable installation of the motor is crucial to the overall performance and operational reliability of the machine. In existing technologies, the motor is typically fixed to the housing using a key and keyway connection. However, compressors generate strong vibrations and impacts during operation. Under long-term alternating loads, this traditional connection method is prone to wear and impact fatigue on the mating surfaces of the key and keyway, leading to increased clearance, decreased motor positioning accuracy, and even circumferential fretting displacement. This, in turn, causes increased noise and decreased transmission efficiency. Utility Model Content

[0003] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a piston refrigeration compressor with a radially fixed motor, so as to realize the stable installation of the motor in the compressor housing.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A piston-type refrigeration compressor with a radially fixed motor includes a housing, a motor housed inside the housing, a stator housed inside the motor, and a protrusion extending from the housing. The protrusion is connected to the stator by bolts to achieve fixed installation of the motor.

[0006] Furthermore, the bolt has a threaded groove, and a sliding rod is provided in the threaded groove. The sliding rod extends to the outside of the bolt and engages with the stator. A push rod is threadedly connected in the threaded groove, and the push rod abuts against the sliding rod to fix the sliding rod.

[0007] Furthermore, the push rod includes a connector and a screw connected in sequence. The screw is threadedly connected to a threaded groove, and the connector has a screw groove at the top to achieve fixed installation of the push rod.

[0008] Furthermore, the screw is connected to a pressure block, which is conical and its diameter gradually decreases in the direction away from the screw. The end of the slide bar, which is placed in the threaded groove, is connected to a fixing block. The fixing block has an arc-shaped groove that matches the shape of the pressure block, and the pressure block is placed in the arc-shaped groove.

[0009] Furthermore, the stator is provided with a fixing groove, and the side wall of the fixing groove is provided with a positioning groove. The other end of the slide rod is placed in the positioning groove, and a push plate connected to the first spring is provided in the positioning groove. The push plate abuts against the slide rod to realize the reset of the slide rod.

[0010] Furthermore, a sliding groove is provided inside the positioning groove, and sliders are provided on both sides of the push plate. The sliders are placed in the sliding groove to achieve the limiting sliding of the push plate.

[0011] Furthermore, the connector is connected to an end cap via screws to limit the movement of the push rod.

[0012] Furthermore, the bottom of the end cap is provided with a groove, and a pressure plate connected to the second spring is provided in the groove. The pressure plate abuts against the connector to enhance the tightening force of the screw.

[0013] Furthermore, the protrusion is provided with a countersunk hole, and the connector and end cap are placed in the countersunk hole, with the end cap flush with the surface of the protrusion.

[0014] Furthermore, an elastic gasket is provided inside the arc-shaped groove.

[0015] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0016] 1. In this utility model, the motor is fixed in the housing by bolts. This installation method has small requirements for the machining tolerance of the motor cavity and the outer diameter of the motor stator, and can reduce the keyway machining steps. The motor stator is fixed under radial force, which can effectively improve the stability and safety of the compressor.

[0017] 2. In this utility model, the push rod and slide rod linkage mechanism set inside the bolt is used to push the slide rod to be firmly locked to the stator by the screwing in of the push rod, thereby achieving multiple locking, which greatly enhances the vibration and impact resistance of the motor installation and effectively prevents the motor from loosening during operation;

[0018] 3. In this utility model, the end cap is pressed onto the connector of the push rod by screws, and the internal second spring and pressure plate structure provide a continuous anti-loosening pre-tightening force, ensuring the long-term stability of the end cap and the entire push rod locking mechanism under vibration environment.

[0019] 4. In this utility model, the countersunk hole design on the protrusion allows the end cap to be fully embedded in it and flush with the outer surface of the protrusion. The structure is compact and neat, avoiding external interference and improving the overall integrity and safety of the product. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a piston refrigeration compressor with a radially fixed motor according to the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of a piston refrigeration compressor with a radially fixed motor according to the present invention.

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of a local structure at point A;

[0024] Figure 4 for Figure 3 Enlarged schematic diagram of the local structure at point B.

[0025] In the diagram: 1-Housing; 2-Motor; 3-Stator; 4-Protrusion; 5-Bolt; 6-Threaded groove; 7-Slide rod; 8-Push rod; 81-Connector; 82-Screw; 9-Pressure block; 10-Fixing block; 11-Arc groove; 12-Fixing groove; 13-Positioning groove; 14-First spring; 15-Push plate; 16-Slide groove; 17-Slider; 18-End cap; 19-Groove; 20-Second spring; 21-Pressure plate; 22-Counterhead hole; 23-Elastic washer. Detailed Implementation

[0026] like Figures 1 to 4 As shown, this utility model provides a compressor motor 2 mounting structure, which is mainly used to stably mount the motor 2 inside the compressor housing 1.

[0027] The compressor includes a housing 1, inside which a receiving cavity is formed. A motor 2 is installed inside the housing 1, which is the power source of the compressor, and a stator 3 is installed.

[0028] A protrusion 4 extends integrally from the inner wall of the housing 1. A through hole is machined on the protrusion 4. During installation, the motor 2 is firmly fixed in the housing 1 by passing the bolt 5 through the through hole of the protrusion 4 and tightening it with the pre-set fixing groove 12 on the stator 3, thereby preventing the motor 2 from shifting or vibrating during operation.

[0029] The bolt 5 has an axially threaded groove 6 inside. A pair of sliding rods 7 are symmetrically arranged at the bottom of the threaded groove 6. One end of the sliding rod 7 moves through the bolt 5 and extends outside the bolt 5. At the same time, a push rod 8 is also threadedly connected inside the threaded groove 6. When the push rod 8 is screwed in, its end abuts against the end of the sliding rod 7. By applying axial force, the sliding rod 7 is pushed outward and locked with the stator 3, thereby fixing the position of the sliding rod 7.

[0030] The extended end of the slide rod 7 is machined with a wedge-shaped head or a chamfer, which can be engaged with a corresponding shaped bayonet on the stator 3.

[0031] The push rod 8 includes a connector 81 and a screw 82 connected coaxially in sequence. The external thread of the screw 82 mates with the internal thread groove 6 of the bolt 5, and the top of the connector 81 is milled with a cross or internal hexagonal screw groove so that the push rod 8 can be installed and removed by screwing with a tool.

[0032] A pressure block 9 is connected to one end of the screw 82 near the slide bar 7. The pressure block 9 is designed as a frustum cone, with its diameter gradually decreasing in the direction away from the screw 82. A fixing block 10 is fixedly connected to the end of the slide bar 7 placed in the threaded groove 6. An arc groove 11 matching the taper of the pressure block 9 is machined on the side of the fixing block 10 facing the pressure block 9. When the pressure block 9 abuts against the fixing block 10, the pressure block 9 is embedded in the arc groove 11.

[0033] The arc-shaped groove 11 is provided with an elastic pad 23 made of elastic polymer, which can increase friction and play a buffering role, making the pressure distribution of the pressure block 9 more uniform.

[0034] A fixing groove 12 is machined at the corresponding position of the stator 3 to accommodate the end of the bolt 5.

[0035] A positioning groove 13 is provided on the side wall of the fixing groove 12. The end of the slide rod 7 away from the push rod 8 is directly opposite the positioning groove 13. A push plate 15 is provided in the positioning groove 13. The push plate 15 is connected to the bottom wall of the positioning groove 13 through the first spring 14. When the push rod 8 pushes the slide rod 7 into the positioning groove 13, the end of the slide rod 7 compresses the push plate 15. Under the action of the spring force, the push plate 15 always maintains a contact state with the end of the push rod 8. When disassembly is required, the push rod 8 is unscrewed. The elastic force of the first spring 14 will push the push rod 8 outward through the push plate 15 to assist the slide rod 7 in resetting, which is convenient for operation.

[0036] To ensure that the push plate 15 moves smoothly without deflection, a slide groove 16 is also machined on the inner side wall of the positioning groove 13. Slider 17 is provided on both sides of the push plate 15. The slider 17 is embedded in the slide groove 16, so that the push plate 15 can only move in a straight line in a predetermined direction.

[0037] The outer end of the connector 81 of the push rod 8 is fixed with an end cap 18 by screws. The end cap 18 is used to cover the screws and limit the axial movement of the push rod 8 to prevent it from coming loose accidentally.

[0038] A groove 19 is provided at the bottom of the end cap 18, and a pressure plate 21 is placed inside the groove 19. The pressure plate 21 is connected to the top wall of the groove 19 through a second spring 20. When the end cap 18 is locked onto the connector 81 with a screw, the pressure plate 21 presses tightly against the end face of the connector 81 under the action of the spring, thereby providing the screw with a continuous radial clamping force pointing towards the connector 81, which greatly enhances the anti-loosening ability of the screw connection and improves the reliability of the fastening.

[0039] The side of the pressure plate 21 facing the connector 81 can also be machined with anti-slip protrusions or ripples to further increase friction.

[0040] A countersunk hole 22 is machined on the protrusion 4 of the housing 1. The installed end cap 18 is accommodated in the countersunk hole 22, and the outer surface of the end cap 18 is flush with the outer surface of the protrusion 4, so as to achieve a compact installation structure, a flat appearance, and avoid additional interference.

[0041] In summary, this embodiment provides a compressor motor 2 mounting structure that is securely connected, shock-resistant, and easy to install and disassemble through the synergistic action of components such as bolt 5, the built-in push rod 8 and slide rod 7 mechanism, and the return spring on stator 3.

[0042] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A reciprocating refrigeration compressor with a radially fixed motor, comprising a housing, a motor disposed within the housing, and a stator disposed within the motor, characterized in that: A protrusion extends from the housing and is connected to the stator by bolts to achieve the fixed installation of the motor.

2. A reciprocating refrigeration compressor with a radially fixed motor according to claim 1, characterized in that: The bolt has a threaded groove, and a sliding rod is provided in the threaded groove. The sliding rod extends to the outside of the bolt and is engaged with the stator. A push rod is threadedly connected in the threaded groove. The push rod abuts against the sliding rod to fix the sliding rod.

3. A reciprocating refrigeration compressor with a radially fixed motor according to claim 2, characterized in that: The push rod includes a connector and a screw connected in sequence. The screw is threadedly connected to a threaded groove, and the connector has a screw groove at the top to achieve fixed installation of the push rod.

4. A reciprocating refrigeration compressor with a radially fixed motor according to claim 3, characterized in that: The screw is connected to a pressure block, which is conical and its diameter gradually decreases away from the screw. The end of the slide bar, which is placed in the threaded groove, is connected to a fixing block. The fixing block has an arc-shaped groove that matches the shape of the pressure block, and the pressure block is placed in the arc-shaped groove.

5. A reciprocating refrigeration compressor with a radially fixed motor according to claim 3, characterized in that: The stator is provided with a fixing groove, and the side wall of the fixing groove is provided with a positioning groove. The other end of the slide rod is placed in the positioning groove. The positioning groove is provided with a push plate connected to the first spring. The push plate abuts against the slide rod to realize the reset of the slide rod.

6. A reciprocating refrigeration compressor with a radially fixed motor according to claim 5, characterized in that: The positioning groove is provided with a sliding groove inside, and the push plate is provided with sliders on both sides. The sliders are placed in the sliding groove to realize the limiting sliding of the push plate.

7. A reciprocating refrigeration compressor with a radially fixed motor according to claim 3, characterized in that: The connector is connected to an end cap by screws, which is used to limit the position of the push rod.

8. A reciprocating refrigeration compressor with a radially fixed motor according to claim 7, characterized in that: The bottom of the end cap is provided with a groove, and a pressure plate connected to the second spring is provided in the groove. The pressure plate abuts against the connector to enhance the tightening force of the screw.

9. A reciprocating refrigeration compressor with a radially fixed motor according to claim 7, characterized in that: The protrusion has a countersunk hole, and the connector and end cap are placed in the countersunk hole. The end cap is flush with the surface of the protrusion.

10. A piston-type refrigeration compressor with a radially fixed motor according to claim 4, characterized in that: An elastic gasket is provided inside the arc-shaped groove.

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