Bidirectional output air compressor
By designing lubrication windows and cover structures on the air compressor, the problem of insufficient lubrication of the eccentric wheel rolling groove was solved, achieving effective lubrication of the eccentric wheel and shaft, and extending the service life of the equipment.
Patent Information
- Application Number
- CN202522153261.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-11
AI Technical Summary
Existing bidirectional output air compressors lack a lubrication structure for the rolling grooves on the eccentric wheel, resulting in high frictional losses and reduced service life.
An air compressor with a lubrication window and a cover structure was designed. The T-shaped limit bracket and spring facilitate lubrication between the eccentric wheel and the shaft. The lubrication window is sealed by the cover, which is removable for easy application of grease.
It improves the service life of the air compressor, reduces frictional loss between the eccentric wheel and the shaft, and extends the maintenance cycle of the equipment.
Smart Images

Figure CN224679630U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of air compressor technology, and in particular relates to a bidirectional output air compressor. Background Technology
[0002] Air compressors, as commonly used equipment, are applied in various liquid pressurization fields. Conventional air compressors typically have only one output end, limiting their application. A bidirectional output air compressor, driven by a motor shaft, uses two eccentric wheels with rolling grooves within them. These, along with a sliding rod fixedly connected to a piston, enable the reciprocating motion of the two pistons, thus achieving bidirectional output and allowing for wider application. A search revealed patent application number 202420776149.8, which discloses a bidirectional output air compressor. This compressor includes a drive housing, a motor shaft fixedly connected to two eccentric wheels, each with a rolling groove containing a rotating shaft. Each eccentric wheel has a pressure-boosting pipe fixedly connected to a through-hole, coaxially aligned with a connecting rod. The two pressure-boosting pipes run in opposite directions and are slidably connected to the connecting rod. A piston located within a pressure-boosting chamber is fixedly connected to the connecting rod, and the piston is slidably and sealed to the pressure-boosting pipe. Each pressure-boosting pipe is fixedly connected to a one-way outlet valve and a one-way inlet valve, both communicating with the pressure-boosting chamber.
[0003] However, during actual use, the applicant found that the lack of a structure for lubricating the rolling grooves on the eccentric wheel made it inconvenient for personnel to regularly lubricate the rolling grooves on the eccentric wheel. This resulted in significant frictional losses during the transmission between the eccentric wheel and the rotating shaft, thereby reducing the service life of the air compressor. In view of this, we propose a bidirectional output air compressor. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0005] This utility model relates to a bidirectional output air compressor, including a mounting base. A drive housing is fixedly connected to the top of the mounting base. A motor is fixedly mounted on the top of the drive housing. The output end of the motor extends into the interior of the drive housing and is fitted with an eccentric wheel. A guide groove is formed on the top of the eccentric wheel. Branch pipes are symmetrically fixedly connected to both sides of the drive housing. A booster pipe is threaded to the outer end of each branch pipe. A piston is slidably connected in the booster pipe. An air inlet and an air outlet are fixedly provided at the outer end of each branch pipe. The air inlet and the booster pipe... The internal structure is connected via a one-way intake valve, and the output nozzle is connected to the inside of the booster pipe via a one-way exhaust valve. Connecting rods are symmetrically slidably connected to both sides of the drive housing. One end of the connecting rod is rotatably connected to a rotating shaft, and the rotating shaft slides along a guide groove. The other end of the connecting rod passes through a branch pipe and is fixedly connected to a piston. A lubrication window is provided on the front side of the drive housing, and the lubrication window is sealed by a cover. The cover is pressed and fixed to the front end face of the drive housing by a T-shaped limit bracket. The rear end of the T-shaped limit bracket is elastically connected to the drive housing by a spring.
[0006] Preferably, the cover has symmetrical arc-shaped slots on both sides, and the front end of the T-shaped limiting frame is engaged in the arc-shaped slots.
[0007] Preferably, the rear end of the T-shaped limiting frame extends into a limiting groove inside the drive housing, and a limiting circular plate is fixedly provided at the rear end of the T-shaped limiting frame, and the limiting circular plate slides along the limiting groove.
[0008] Preferably, the spring is sleeved on the T-shaped limiting frame, with the front end of the spring abutting against the side wall of the limiting slide groove and the rear end of the spring abutting against the limiting circular plate.
[0009] Preferably, positioning holes are provided at the four corners of the cover, and the positioning holes are connected to the positioning posts provided on the front end face of the drive housing.
[0010] Preferably, the outer wall of the branch pipe is provided with an external thread, the inner wall of the booster pipe is provided with an internal thread that mates with the external thread, and handles are symmetrically fixed on the outer wall of the booster pipe.
[0011] This utility model has the following beneficial effects:
[0012] This utility model discloses a bidirectional output air compressor. By holding the handle and unscrewing the booster pipe from the branch pipe, personnel can easily maintain or replace the sealing ring on the piston. By pulling the T-shaped limit bracket outward and rotating it 90°, the front end of the T-shaped limit bracket is moved out of the arc-shaped slot, allowing the cover to be removed from the drive housing. This enables personnel to easily apply grease to the guide groove through the lubrication window, facilitating lubrication between the eccentric wheel and the shaft, and improving the service life of the bidirectional output air compressor. Attached Figure Description
[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the external structure of a bidirectional output air compressor according to the present invention;
[0015] Figure 2 This is a schematic diagram of the internal structure of a bidirectional output air compressor according to the present invention;
[0016] Figure 3 This utility model relates to a bidirectional output air compressor. Figure 2 Enlarged view of the structure at point A in the middle.
[0017] The attached diagram lists the components represented by each number as follows:
[0018] 1. Mounting base; 2. Drive housing; 21. Lubrication window; 22. Limiting groove; 3. Branch pipe; 31. Pressure boosting pipe; 311. Handle; 32. Air inlet; 33. Air outlet; 34. One-way air inlet valve; 35. One-way air outlet valve; 4. Motor; 5. Cover; 51. Arc-shaped groove; 6. T-shaped limiting bracket; 61. Limiting circular plate; 7. Eccentric wheel; 71. Guide groove; 8. Connecting rod; 81. Rotating shaft; 9. Piston; 10. Spring. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-3As shown, this utility model provides a technical solution:
[0021] A bidirectional output air compressor includes a mounting base 1. A drive housing 2 is fixedly connected to the top of the mounting base 1. A motor 4 is fixedly mounted on the top of the drive housing 2. The output end of the motor 4 extends into the interior of the drive housing 2 and is fitted with an eccentric wheel 7. A guide groove 71 is provided on the top of the eccentric wheel 7. Branch pipes 3 are symmetrically fixedly connected to both sides of the drive housing 2. A booster pipe 31 is threaded to the outer end of the branch pipe 3. An external thread is provided on the outer wall of the branch pipe 3. An internal thread is provided on the inner wall of the booster pipe 31 to mate with the external thread. Handles 311 are symmetrically fixedly provided on the outer wall of the booster pipe 31. The handles 311 are provided for rotating the booster pipe 31, making it convenient for personnel to unscrew the booster pipe 31 from the branch pipe 3, thereby facilitating maintenance of the piston 9. A piston 9 is slidably connected in the booster pipe 31. An air inlet 32 and an air outlet 33 are fixedly installed at the outer end of the branch pipe 3. The air inlet 32 is connected to the inside of the booster pipe 31 through a one-way air inlet valve 34, and the air outlet 33 is connected to the inside of the booster pipe 31 through a one-way air outlet valve 35. Connecting rods 8 are symmetrically slidably connected on both sides of the drive housing 2. One end of the connecting rod 8 is rotatably connected to a rotating shaft 81, and the rotating shaft 81 slides along the guide groove 71. The inside of the guide groove 71 is coated with grease to reduce frictional loss between the rotating shaft 81 and the eccentric wheel 7. The other end of the connecting rod 8 passes through the branch pipe 3 and is fixedly connected to the piston 9. By holding the handle 311, the booster pipe 31 can be unscrewed from the branch pipe 3, which makes it convenient for personnel to maintain or replace the sealing ring on the piston 9.
[0022] A lubrication window 21 is provided on the front side of the drive housing 2. The lubrication window 21 is sealed by a cover 5. The cover 5 is pressed and fixed to the front end face of the drive housing 2 by a T-shaped limiting bracket 6. A sealing gasket is provided on the front end face of the drive housing 2 outside the lubrication window 21 to effectively seal the connection between the drive housing 2 and the cover 5. Positioning holes are provided at the four corners of the cover 5, and the positioning holes are connected to the positioning posts provided on the front end face of the drive housing 2 to achieve positioning and installation of the cover 5. The rear end of the T-shaped limiting bracket 6 is elastically connected to the drive housing 2 by a spring 10. Arc-shaped slots 51 are symmetrically provided on both sides of the cover 5. The front end of the T-shaped limiting bracket 6 is locked in the arc-shaped slot 51, and the rear end of the T-shaped limiting bracket 6 extends to the drive housing. In the internal limiting groove 22, the rear end of the T-shaped limiting frame 6 is fixedly provided with a limiting circular plate 61, and the limiting circular plate 61 slides along the limiting groove 22. The spring 10 is sleeved on the T-shaped limiting frame 6, the front end of the spring 10 abuts against the side wall of the limiting groove 22, and the rear end of the spring 10 abuts against the limiting circular plate 61. By pulling the T-shaped limiting frame 6 outward and rotating the T-shaped limiting frame 6 by 90°, the front end of the T-shaped limiting frame 6 is moved out of the arc-shaped slot 51, and the cover 5 can be removed from the drive housing 2. This allows personnel to easily apply grease to the guide groove 71 through the lubrication window 21, which facilitates lubrication between the eccentric wheel 7 and the rotating shaft 81, and can improve the service life of the bidirectional output air compressor.
[0023] Working principle: During use, the drive motor 4 drives the eccentric wheel 7 to rotate, which causes the rotating shaft 81 to slide along the guide groove 71. Since the eccentric wheel 7 is eccentrically set, it can drive the connecting rod 8 to move left and right, which in turn drives the piston 9 to move back and forth along the booster pipe 31. During the reciprocating movement of the piston 9, air can enter the booster pipe 31 through the air inlet 32 and be output from the output nozzle 33. The two air inlets 32 can achieve bidirectional output. By manually pulling the T-shaped limit bracket 6 outward and rotating the T-shaped limit bracket 6 90°, the front end of the T-shaped limit bracket 6 is removed from the arc-shaped slot 51, and the cover 5 can be removed from the front end of the drive housing 2. Thus, air can be discharged from the lubrication window 21 to the guide groove 71. Grease is applied to the slide groove 71 and the connecting rod 8 to lubricate the connection between the rotating shaft 81 and the eccentric wheel 7, as well as the left and right movement of the connecting rod 8. After lubrication, the cover 5 is pressed onto the front end face of the drive housing 2. Then, the T-shaped limit bracket 6 is pulled forward, which causes the limit plate 61 to compress the spring 10 and rotate the T-shaped limit bracket 6 90° in the opposite direction. Then, the T-shaped limit bracket 6 is released. At this time, under the elastic force of the spring 10, the T-shaped limit bracket 6 can be driven to move backward to reset and the front end of the T-shaped limit bracket 6 is locked in the arc-shaped slot 51, so that the cover 5 can be pressed and fixed on the drive housing 2. By holding the handle 311 and rotating the booster pipe 31, the booster pipe 31 can be unscrewed from the branch pipe 3 to maintain or replace the sealing ring on the piston 9.
[0024] The text shows and describes the basic principles, main features and advantages of this utility model. The standard parts used in this utility model can all be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part can all adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The machinery, parts and equipment can all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. This part will not be described in detail in the text.
[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.
Claims
1. A bidirectional output air compressor, comprising a mounting base (1), characterized in that: A drive housing (2) is fixedly connected to the top of the mounting base (1). A motor (4) is fixedly mounted on the top of the drive housing (2). The output end of the motor (4) extends into the interior of the drive housing (2) and is fitted with an eccentric wheel (7). A guide groove (71) is provided on the top of the eccentric wheel (7). Branch pipes (3) are symmetrically fixedly connected to both sides of the drive housing (2). A booster pipe (31) is threaded onto the outer end of the branch pipe (3). A piston (9) is slidably connected in the booster pipe (31). An air inlet (32) and an output nozzle (33) are fixedly provided on the outer end of the branch pipe (3). The air inlet (32) is connected to the interior of the booster pipe (31) through a one-way air inlet valve (34). The output nozzle (33) is connected to the inside of the booster pipe (31) through a one-way exhaust valve (35). The two sides of the drive housing (2) are symmetrically connected to connecting rods (8). One end of the connecting rod (8) is rotatably connected to a rotating shaft (81), and the rotating shaft (81) slides along the guide groove (71). The other end of the connecting rod (8) passes through the branch pipe (3) and is fixedly connected to the piston (9). The front side of the drive housing (2) is provided with a lubrication window (21). The lubrication window (21) is sealed by a cover (5). The cover (5) is pressed and fixed on the front end face of the drive housing (2) by a T-shaped limit bracket (6). The rear end of the T-shaped limit bracket (6) is elastically connected to the drive housing (2) by a spring (10).
2. The bidirectional output air compressor according to claim 1, characterized in that, The cover (5) has symmetrical arc-shaped slots (51) on both sides, and the front end of the T-shaped limiting frame (6) is locked in the arc-shaped slots (51).
3. A bidirectional output air compressor according to claim 1, characterized in that, The rear end of the T-shaped limiting frame (6) extends into the limiting groove (22) opened inside the drive housing (2). The rear end of the T-shaped limiting frame (6) is fixedly provided with a limiting circular plate (61), and the limiting circular plate (61) slides along the limiting groove (22).
4. A bidirectional output air compressor according to claim 3, characterized in that, The spring (10) is sleeved on the T-shaped limiting frame (6), the front end of the spring (10) abuts against the side wall of the limiting slide groove (22), and the rear end of the spring (10) abuts against the limiting circular plate (61).
5. A bidirectional output air compressor according to claim 1, characterized in that, The cover (5) has positioning holes at its four corners, and the positioning holes are connected to the positioning posts on the front end face of the drive housing (2).
6. A bidirectional output air compressor according to claim 1, characterized in that, The outer wall of the branch pipe (3) is provided with an external thread, and the inner wall of the booster pipe (31) is provided with an internal thread that mates with the external thread. A handle (311) is symmetrically fixed on the outer wall of the booster pipe (31).
Citation Information
Patent Citations
Two-way output air compressor
CN222478880U