Novel positive-pressure labor-saving sucking pump structure

Abstract

The utility model discloses a novel positive pressure labor-saving air extracting pump structure which comprises a main body outer cover, an inner cylinder barrel is arranged in the main body outer cover, a handle is arranged at the upper end of the main body outer cover, the handle is fixedly connected with a piston connecting rod, an inner cylinder cover is fixedly arranged on the piston connecting rod, the inner cylinder cover is matched with the inner cylinder barrel, and the piston connecting rod is fixedly connected with the inner cylinder barrel. The lower end of the piston connecting rod is connected with a piston, a piston sealing ring is installed on the piston, an air inlet end is arranged at the end, away from the handle, of the main body outer cover and comprises an air inlet end cover and an air inlet sealing ring matched with the air inlet end cover, and the end face, making contact with the piston sealing ring, of the piston is a conical face. Air guide grooves are formed in the circumferential face of the piston at intervals, the piston is driven by the piston connecting rod to move upwards, the piston sealing ring slides downwards to release air under the combined action of the air cylinder wall and negative pressure, and air one-way flowing is achieved through release of the air guide grooves.

Description

Technical Field

[0001] The utility model belongs to the technical field of air pumps, and in particular relates to a novel positive-pressure labor-saving air pump structure. Background Art

[0002] At present, the common vacuum pumps on the market are all pull-up vacuum pumps. This type of pump has a very obvious defect. In the process of pulling up to evacuate air, the left (right) hand is required to press the pump body hard to ensure the sealing between the pump and the vacuum tank (bag). The right (left) hand pulls up the piston to achieve air extraction. The simple force structure is: left hand = downward force + upward force + pressure of the sealing ring, right hand = upward force + vacuum suction + gravitational potential energy of the right hand. The opposite force directions of the left and right hands lead to a poor user experience. The reasons are: 1. It is laborious; 2. The downward force must be greater than the upward force. When it is equal to or less than the upward force, air leakage will occur between the air pump and the tank body; 3. The upward pulling force that actually acts on the vacuum does not conform to the force habits of normal life. This process requires more effort to offset the gravity of the arm.

[0003] In view of the above factors, a new type of positive pressure and labor-saving air pump structure is specially designed. The air pumping process is downward pressure, which is more in line with human exertion habits on the one hand, and uses the gravitational potential energy of the arm to achieve the effect of labor saving on the other hand. Utility Model Content

[0004] The purpose of the utility model is to provide a novel positive pressure labor-saving air pump structure to solve the problems raised in the above background technology.

[0005] The purpose of the utility model is achieved through the following technical solutions: a new type of positive pressure labor-saving air pump structure, including a main body outer cover, an inner cylinder barrel is arranged inside the main body outer cover, a handle is arranged at the upper end of the main body outer cover, the handle is fixedly connected to the piston connecting rod, an inner cylinder cover is fixedly arranged on the piston connecting rod, the inner cylinder cover is matched with the inner cylinder barrel, the lower end of the piston connecting rod is connected to the piston, and a piston sealing ring is installed on the piston;

[0006] An air inlet end is arranged at one end of the main body outer cover away from the handle, and the air inlet end comprises an air inlet end cover and an air inlet sealing ring matched with the air inlet end cover.

[0007] Furthermore, the end surface of the piston in contact with the piston sealing ring is a conical surface, and air guide grooves are arranged at intervals on the circumferential surface of the piston.

[0008] Furthermore, the piston moves upward under the drive of the piston connecting rod, and the piston sealing ring slides down under the combined action of the cylinder wall and the negative pressure to release the air through the air guide groove to realize the one-way flow of gas.

[0009] Furthermore, the piston connecting rod drives the piston to press downward, and the piston sealing ring slides upward under the combined action of the friction force of the cylinder wall and the reaction force of the compressed air, and is tightly attached to the cylinder wall under the action of the piston cone surface.

[0010] Furthermore, the inner cylinder cover cooperates with the positioning groove provided on the end surface of the inner cylinder barrel, and air inlet holes are provided along the circumferential end surface of the inner cylinder barrel, and the air inlet holes are evenly distributed along the inner cylinder barrel.

[0011] Furthermore, a plurality of holes are evenly distributed on the end surface of the air intake end cover, which are arranged opposite to the bottom surface of the inner cylinder barrel, and the bottom surface of the inner cylinder barrel is arranged in a closed manner.

[0012] Furthermore, the piston connecting rod is a hollow tube structure, and the piston connecting rod is connected to and passes through the piston.

[0013] Furthermore, the upper end of the piston connecting rod is communicated with the handle, and the handle is a hollow structure, and a grille exhaust channel is provided on the handle to communicate with the outside.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model has a simple structure and is more labor-saving to operate, and applying force downward provides a better operating experience; pressing downward saves effort, conforms to the ergonomic design, does not require the coordination of the left and right hands, and can be used immediately after being put into use.

[0016] The positive-pressure labor-saving air pump structure of the utility model has a downward pressure during the air pumping process, which is more in line with the human body's exertion habits on the one hand, and utilizes the gravitational potential energy of the arm to achieve the labor-saving effect on the other hand.

[0017] The piston for the manual air pump of the utility model has the functions of sealing and one-way air intake, thereby eliminating the need for a conventional manual air pump to have an additional one-way valve or a structure that requires secondary rubber coating to form a one-way sealing ring.

[0018] The design of the piston of the utility model and the active one-way valve realize the functions of the piston and the one-way valve without adding any accessories.

[0019] The air inlet groove of the utility model adopts a flat groove, which is realized by the cooperation of the inner and outer cylinders, and the exhaust groove is discharged through a hollow steel pipe and a top handle, which mainly simplifies the production process and reduces the exhaust noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0021] Figure 2 This utility model Figure 1 Schematic cross-section;

[0022] Figure 3 It is a plan view of the air intake end cover of the utility model;

[0023] Figure 4 This is a schematic diagram of the connection between the piston and the piston connecting rod of the utility model;

[0024] Figure 5 It is a three-dimensional schematic diagram of the inner cylinder of the utility model;

[0025] Figure 6 It is a schematic diagram of the air intake and exhaust passages of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1-6 As shown, a new type of positive pressure labor-saving air pump structure includes a main body outer cover 1, an inner cylinder 3 is arranged inside the main body outer cover 1, a handle 2 is arranged at the upper end of the main body outer cover 1, the handle 2 is fixedly connected to a piston connecting rod 4, an inner cylinder cover 5 is fixedly arranged on the piston connecting rod 4, the inner cylinder cover 5 cooperates with the inner cylinder 3, the lower end of the piston connecting rod 4 is connected to a piston 6, and a piston sealing ring 7 is installed on the piston 6;

[0030] There is an air gap between the inner cylinder and the main outer cover. An air inlet end 8 is provided at one end of the main outer cover 1 away from the handle 2. The air inlet end 8 includes an air inlet end cover 9 and an air inlet sealing ring 10 matched with the air inlet end cover 9.

[0031] In order to facilitate the release of air when in use, the end surface of the piston 6 that contacts the piston sealing ring 7 is a conical surface, and air guide grooves 11 are arranged at intervals on the circumferential surface of the piston 6. The piston 6 moves upward under the drive of the piston connecting rod 4, and the piston sealing ring 7 slides down under the combined action of the cylinder wall and the negative pressure to release the air through the air guide groove 11 to achieve unidirectional flow of gas.

[0032] In order to facilitate use, the gas under the piston is squeezed out from the hollow tube, so that a vacuum, that is, negative pressure, appears above the piston to achieve air extraction. The piston 6 is pressed down by the piston connecting rod 4, and the piston sealing ring 7 slides upward under the combined action of the friction force of the cylinder wall and the reaction force of the compressed air, and is tightly attached to the cylinder wall under the action of the piston cone.

[0033] In order to facilitate the air intake between the inner cylinder 3 and the main body outer cover when in use, the inner cylinder cover 5 cooperates with the positioning groove 12 opened on the end surface of the inner cylinder 3, and an air intake hole 13 is arranged along the circumferential end surface of the inner cylinder 3. The air intake holes 13 are evenly distributed along the inner cylinder 3. A plurality of channels are evenly distributed on the end surface of the air intake end cover 9, which are arranged opposite to the bottom surface of the inner cylinder 3. The bottom surface of the inner cylinder 3 is closed.

[0034] In order to facilitate exhaust in use, the piston connecting rod 4 is configured as a hollow tube structure, and the piston connecting rod 4 is connected to and penetrates the piston 6.

[0035] The upper end of the piston connecting rod 4 is communicated with the handle 2, and the handle 2 is a hollow structure. A grille exhaust channel is provided on the handle 2 to communicate with the outside.

[0036] When the piston moves upward, the gas above the piston is compressed to the bottom of the piston. The piston moves downward to achieve two effects. First, the gas below the piston is squeezed out from the hollow tube. Second, a vacuum is created above the piston, which is a negative pressure, to achieve air extraction.

[0037] Air is introduced through a number of holes evenly distributed on the end surface of the air inlet end cover 9. The air enters the inner cylinder through the air gap between the inner cylinder and the main body outer cover through the air inlet hole, and enters the piston connecting rod through the piston and the bottom of the piston connecting rod. The air is then discharged from the upper end of the piston connecting rod through the grille exhaust channel provided on the handle, which is connected to the outside world.

[0038] The piston is sealed when it moves and also has the function of a one-way valve. When the piston is upward, it is not sealed. When it is downward, the greater the air pressure, the better the seal.

[0039] When the piston is pressed down, the sealing ring will slide upward due to the friction of the cylinder wall and the reaction force of the compressed air, and will cling to the cylinder wall under the action of the piston cone surface to achieve a sealing effect.

[0040] When the piston moves upward, the sealing ring is affected by the cylinder wall and negative pressure, and slides down to release the air through the air guide groove to realize one-way flow of gas.

[0041] The utility model adopts downward pressure during the air extraction process, which is more in line with human exertion habits, and adopts the piston of a manual air extraction pump, which has a sealing function and realizes a one-way air intake function, eliminating the need for a traditional manual air extraction pump to have an external one-way valve or a secondary rubber-wrapped one-way sealing ring structure.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of positive pressure labor-saving air pump structure, Features: The invention comprises a main body outer cover (1), wherein an inner cylinder (3) is arranged inside the main body outer cover (1), a handle (2) is arranged at the upper end of the main body outer cover (1), the handle (2) is fixedly connected to a piston connecting rod (4), an inner cylinder cover (5) is fixedly arranged on the piston connecting rod (4), the inner cylinder cover (5) cooperates with the inner cylinder (3), the lower end of the piston connecting rod (4) is connected to a piston (6), and a piston sealing ring (7) is installed on the piston (6); An air inlet end (8) is provided at one end of the main body outer cover (1) away from the handle (2), and the air inlet end (8) includes an air inlet end cover (9) and an air inlet sealing ring (10) matched with the air inlet end cover (9); The piston (6) moves upward under the drive of the piston connecting rod (4), and the piston sealing ring (7) slides down under the combined action of the cylinder wall and the negative pressure to release air through the air guide groove (11) to achieve unidirectional flow of gas.

2. According to the new positive pressure labor-saving air pump structure of claim 1, Features: The end surface of the piston (6) that contacts the piston sealing ring (7) is a conical surface, and air guide grooves (11) are arranged at intervals on the circumferential surface of the piston (6).

3. According to the new positive pressure labor-saving air pump structure of claim 2, Features: The piston (6) is pressed downwardly by the piston connecting rod (4), and the piston sealing ring (7) slides upwardly under the combined action of the friction force of the cylinder wall and the reaction force of the compressed air, and is tightly attached to the cylinder wall under the action of the piston cone surface.

4. According to the new positive pressure labor-saving air pump structure of claim 3, Features: The inner cylinder cover (5) cooperates with a positioning groove (12) provided on the end surface of the inner cylinder barrel (3), and air inlet holes (13) are provided along the circumferential end surface of the inner cylinder barrel (3). The air inlet holes (13) are evenly distributed along the inner cylinder barrel (3).

5. According to the new positive pressure labor-saving air pump structure of claim 4, Features: A plurality of holes are evenly distributed on the end surface of the air intake end cover (9), which is arranged opposite to the bottom surface of the inner cylinder (3), and the bottom surface of the inner cylinder (3) is arranged in a closed manner.

6. The new positive pressure labor-saving air pump structure according to claim 5, Features: The piston connecting rod (4) is a hollow tube structure, and the piston connecting rod (4) is connected to and penetrates the piston (6).

7. The new positive pressure labor-saving air pump structure according to claim 6, Features: The upper end of the piston connecting rod (4) is in communication with the handle (2), and the handle (2) is a hollow structure. The handle (2) is provided with a grille exhaust passage in communication with the outside.

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