A miniature peristaltic pump

Abstract

The utility model relates to peristaltic pump technical field discloses a kind of micro peristaltic pump, it is inserted motor in the bottom surface of pump bottom shell, is driven planetary gear by motor, then drives I-shaped groove rotation;I-shaped groove drives roller axle, so that roller axle extrusion hose produces vacuum, to extract liquid.The utility model uses is four roller axle installation in I-shaped groove in square arrangement;When pump works, roller axle turns to any direction always keep at least two roller axle extrusion to hose, form pressure-maintaining effect.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and more specifically, to a miniature peristaltic pump. Background Technology

[0002] Peristaltic pumps pump fluid by alternately squeezing and releasing a tubing through rotating rollers. The pump tubing between the two rollers forms a "pillow" shape for the fluid. Currently, peristaltic pumps use a motor to drive gears, which in turn rotate an I-beam joint. The rollers on the I-beam directly squeeze the tubing, creating a sealed vacuum environment to draw in the liquid. However, in existing pumps, when both rollers are rotated to the horizontal position of the tubing opening and the pump stops operating immediately after a power outage, only one roller squeezes the tubing, failing to achieve a pressure-maintaining effect.

[0003] Therefore, how to improve the I-groove so that the roller can produce a pressure-holding effect in any direction has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The technical problem to be solved by this utility model is that, in the above-mentioned technology, the motor drives the gear to rotate, which in turn drives the I-beam groove to rotate. The roller on the I-beam groove directly squeezes the hose to form a sealed vacuum environment to pump liquid. However, when the two rollers rotate to the horizontal direction of the pipe opening and the pump just stops working due to power failure, only one roller squeezes the hose, which fails to achieve the pressure holding effect. Therefore, this utility model provides a miniature peristaltic pump.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a micro peristaltic pump, which has the following features:

[0006] The pump base shell is formed as a hollow cylinder. A through hole is provided on one side of the pump base shell, and a snap-fit ​​structure is provided on the other side to be installed and fixed with the snap-fit ​​of the pump top cover. A baffle is provided on the other side, and a semi-circular groove is provided on the baffle for assembling the adapter.

[0007] The motor, whose shaft passes through the through hole, is fixed to the pump base housing with screws;

[0008] A shaft gear, which is mounted on the rotating shaft of the motor;

[0009] Planetary gears, which are mounted on the three cylinders of the planet carrier;

[0010] The planetary carrier is disc-shaped with three cylinders at the bottom and a gear-shaped protrusion at the top. The planetary carrier and the planetary gears are together housed in the pump bottom shell.

[0011] I-shaped groove, which is in the shape of "I", with a gear-shaped groove at the bottom, a through hole in the middle, and four square-arranged steel needle holes on both the upper and lower end faces of the I-shaped groove. The I-shaped groove is arranged on the gear-shaped convex step of the planet carrier;

[0012] Steel needle, which is inserted into the steel needle hole of the I-shaped groove;

[0013] Roller, which is cylindrical, with a through hole in the middle for passing through the steel needle, and is installed in the I-shaped groove;

[0014] Adapter, which is connected to the nozzle of the hose and is arranged on the semi-circular groove of the pump bottom shell;

[0015] Hose, whose nozzle is connected to the adapter and is sleeved on the roller in the I-shaped groove;

[0016] Pump upper cover, whose tail has a buckle structure. The pump upper cover covers the top of the pump bottom shell and is fixed with screws;

[0017] In a micro peristaltic pump of the present utility model, there is a through hole on one side of the pump bottom shell. The motor passes through the through hole and extends into the pump bottom shell. One side of the buckle structure is cooperatively installed and fixed with the pump upper cover; The planetary gear is installed on the planet carrier and is installed in the pump bottom shell together. The steel needle passes through the roller and is installed in the I-shaped groove. The hose is sleeved on the roller in the I-shaped groove, and the I-shaped groove is installed on the planet carrier; The adapter is connected to the hose nozzle and is arranged on the semi-circular groove of the pump bottom shell. The roller forms a sealed vacuum liquid extraction environment by squeezing the hose;

[0018] Compared with the prior art, the present utility model uses four rollers installed in the I-shaped groove in a square arrangement; When the pump works, at least two rollers always squeeze the hose in any direction of rotation of the rollers, forming a pressure maintaining effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0020] Figure 1 is a perspective view of an embodiment of a micro peristaltic pump provided by the present utility model;

[0021] Figure 2 is a perspective view of another embodiment of a micro peristaltic pump provided by the present utility model; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the drawings.

[0023] As Figures 1-2As shown, in the first embodiment of a micro peristaltic pump of the present utility model, a micro peristaltic pump includes a motor 101, a pump bottom shell 102, a shaft gear 103, planetary gears 104 (104a, 104b, 104c), a planetary carrier 105, an I-shaped groove 106, roller shafts 107 (107a, 107b, 107c, 107d), steel needles 108 (108a, 108b, 108c, 108d), adapter joints 109 (109a, 109b), a hose 110, and a pump upper cover 111.

[0024] Among them, the pump bottom shell 102 is formed as a hollow cylindrical body. A through hole is provided on one side of the pump bottom shell 102, and a snap structure is provided on one side for snap-fit installation and fixation with the tail of the pump upper cover 111; a baffle is provided on the other side, and a semi-circular groove is provided on the baffle for assembling the adapter joints 109 (109a, 109b);

[0025] The rotating shaft of the motor 101 passes through the through hole and is fixed to the pump bottom shell 102 with screws;

[0026] The shaft gear 103 is arranged on the rotating shaft of the motor 101;

[0027] The planetary gears 104 (104a, 104b, 104c) are arranged on three cylinders of the planetary carrier 105;

[0028] The planetary carrier 105 is in a disc shape, with three cylinders provided below and a gear-shaped convex step provided above. The planetary carrier 105 and the planetary gears 104 (104a, 104b, 104c) are jointly arranged inside the pump bottom shell 102;

[0029] The I-shaped groove 106 is in an "I" shape, with a gear-shaped groove provided at the bottom, a through hole provided in the middle, and four steel needle holes arranged in a square at both the upper and lower end faces of the I-shaped groove 106. The I-shaped groove 106 is arranged on the gear-shaped convex step of the planetary carrier 105;

[0030] The steel needles 108 (108a, 108b, 108c, 108d) are inserted into the steel needle holes of the I-shaped groove 106;

[0031] The roller shafts 107 (107a, 107b, 107c, 107d) are cylindrical, with a through hole provided in the middle for passing through the steel needles 108 (108a, 108b, 108c, 108d), and are installed inside the I-shaped groove 106;

[0032] The adapter joints 109 (109a, 109b) are connected to the pipe mouths of the hose 110 and are arranged on the semi-circular groove of the pump bottom shell 102;

[0033] The hose 110 has its port connected to the adapter and is fitted onto the rollers 107 (107a, 107b, 107c, 107d) inside the I-beam groove 106;

[0034] The pump cover 111 has a snap-fit ​​structure at its rear end. The pump cover 111 covers the top of the pump base 102 and is fixed with screws.

[0035] In the miniature peristaltic pump described in this utility model, a through hole is provided on one side of the pump bottom shell. The motor passes through the through hole and extends into the pump bottom shell. A snap-fit ​​structure on one side is installed and fixed with the pump top cover. Planetary gears are installed on a planetary carrier and are installed together in the pump bottom shell. A steel needle passes through a roller and is installed in an I-shaped groove. A flexible tube is sleeved on the roller in the I-shaped groove, which is installed on the planetary carrier. An adapter is connected to the opening of the flexible tube and is set on the semi-circular groove of the pump bottom shell. The roller compresses the flexible tube to form a sealed vacuum pumping environment.

[0036] Compared with the prior art, this utility model uses four rollers installed in a square arrangement in the I-shaped groove; when the pump is working, no matter which direction the rollers rotate, at least two rollers will always squeeze the hose to form a pressure holding effect.

[0037] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A miniature peristaltic pump, characterized in that, Comprising: A pump bottom shell, which is formed as a hollow cylindrical structure. There is a through hole on one side of the pump bottom shell, and a buckle structure on one side for snap-fit installation and fixation with the tail of the pump upper cover; there is a baffle on the other side, and a semi-circular groove is provided on the baffle for assembling the adapter; An electric motor, whose rotating shaft passes through the through hole and is fixed to the pump bottom shell with screws; A shaft gear, which is arranged on the rotating shaft of the electric motor; Planet gears, which are arranged on three cylinders of the planet carrier; A planet carrier, which is disc-shaped, has three cylinders at the bottom and a gear-shaped convex step at the top. The planet carrier and the planet gears are jointly arranged inside the pump bottom shell; An I-shaped groove, which is in the shape of "I", has a gear-shaped groove at the bottom, a through hole in the middle, and four square-arranged steel needle holes on both the upper and lower end faces of the I-shaped groove. The I-shaped groove is arranged on the gear-shaped convex step of the planet carrier; Steel needles, which are inserted into the steel needle holes of the I-shaped groove; Rollers, which are cylindrical and have a through hole in the middle for passing through the steel needles and are installed in the I-shaped groove; An adapter, which is connected to the nozzle of the hose and is arranged on the semi-circular groove of the pump bottom shell; A hose, whose nozzle is connected to the adapter and is sleeved on the roller inside the I-shaped groove; A pump upper cover, which has a buckle structure at the tail. The pump upper cover covers the top of the pump bottom shell and is fixed with screws; The micro peristaltic pump has a through hole on one side of the pump bottom shell. The electric motor passes through the through hole and extends into the pump bottom shell. One side's buckle structure is cooperatively installed and fixed with the pump upper cover; the planet gears are installed on the planet carrier and are jointly installed inside the pump bottom shell. The steel needles pass through the rollers and are installed in the I-shaped groove. The hose is sleeved on the roller of the I-shaped groove. The I-shaped groove is installed on the planet carrier; the adapter is connected to the hose nozzle and is arranged on the semi-circular groove of the pump bottom shell. The rollers form a sealed vacuum liquid extraction environment by squeezing the hose; The micro peristaltic pump uses four rollers installed in the I-shaped groove in a square arrangement; when the pump works, at least two rollers always squeeze the hose in any direction of the rollers' rotation, forming a pressure maintaining effect.

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