Peristaltic pump

Abstract

The utility model relates to the technical field of peristaltic pumps, and discloses a peristaltic pump which is characterized in that a motor is inserted into the bottom surface of a pump bottom shell, the motor drives a gear to rotate, the gear drives an I-shaped groove to rotate, the I-shaped groove drives a rolling shaft to rotate, and the rolling shaft extrudes a hose to generate vacuum so as to extract liquid. The four rolling shafts which are arranged in a square mode are adopted, the steel needles penetrate through the middles of the rolling shafts and are fixed to the I-shaped groove, the stability of the I-shaped groove is improved due to the fact that the four rolling shafts are arranged in the square mode, and the service life of the whole pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of peristaltic pumps, and more specifically, to a micro peristaltic pump. Background Art

[0002] Peristaltic pumps pump fluids by alternately squeezing and releasing a flexible tube through the rotation of rollers. A peristaltic pump creates a "pillow" of fluid through a section of pump tubing between three rotating rollers. Currently, peristaltic pumps use a motor to drive an I-shaped slot, where rollers squeeze the flexible tube, creating a sealed vacuum environment to pump the fluid. However, existing I-shaped slots only have three rollers in the middle, making them less stable and prone to tilting during rotation, resulting in poor stability and a shorter lifespan.

[0003] Therefore, how to improve the stability of the I-shaped slot during operation becomes a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that, in view of the defect that the rotating shaft of the existing motor in the prior art drives the I-groove, the roller on the I-groove directly squeezes the hose, and the I-groove has low stability, which easily shortens the service life of the hose when used for a long time, and a stable micro peristaltic pump is provided.

[0005] The technical solution adopted by the utility model to solve the technical problem is to construct a stable micro peristaltic pump having:

[0006] The pump bottom shell is cylindrical in shape, with a through hole in the center and gear grooves on both sides of the through hole;

[0007] a motor, the shaft of which passes through the through hole and extends into the pump bottom casing and is fixed with screws;

[0008] a main gear disposed on the shaft of the motor;

[0009] A driven gear A, which is arranged on a gear groove in the pump bottom shell;

[0010] A pressure block A is rectangular and has a cylindrical step on one side. The pressure block A is pressed on the driven gear A in the pump bottom shell.

[0011] A driven gear B, which is arranged on the cylindrical step of the pressing block A and meshes with the driven gear A;

[0012] The middle shell is cylindrical in shape with a through hole in the middle and gear grooves on the upper and lower sides;

[0013] A driven gear C, which is installed in the gear groove of the middle housing;

[0014] A pressing block B is rectangular and has a cylindrical step on one side. The pressing block B is pressed on the driven gear C in the middle housing.

[0015] A driven gear D, which is mounted on the cylindrical step of the pressing block B and meshes with the driven gear C;

[0016] The fixed plate is cylindrical in shape, with a large through hole in the middle and four small through holes around it. The large through hole passes through the driven gear D and covers the top of the driven gear C to prevent the gear from shaking.

[0017] The diamond-shaped middle frame is diamond-shaped, with cylindrical frames on the upper and lower sides, a circular through-hole in the internal cavity, and a hose groove on the horizontal side;

[0018] An I-shaped slot, which is in the shape of an "I" character, with four through holes arranged in a square on both the upper and lower sides, is arranged in the diamond-shaped middle frame, and a gear groove is provided at the bottom of the I-shaped slot to engage with the driven gear D;

[0019] The roller is cylindrical and has a through hole in the middle, and the roller is arranged in the I-shaped groove;

[0020] A steel needle passes through the through hole of the I-shaped slot and simultaneously passes through the through hole in the middle of the roller to fix the roller;

[0021] a hose, which is sleeved on the roller;

[0022] The pump cover is cylindrical and has a hose groove on one side. The pump cover is placed on the diamond-shaped middle frame and fixed with screws.

[0023] The roller squeezes the hose to form a sealed vacuum liquid extraction environment; the rollers are arranged in a square, and the steel needle is inserted from the end face and fixed on the I-slot. The motor shaft drives the gear to rotate, thereby driving the I-slot to rotate to drive the roller to squeeze the hose, thereby increasing the stability of the I-slot and improving the overall service life of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 This is a three-dimensional diagram of an embodiment of a peristaltic pump provided by the present utility model;

[0026] Figure 2 This is a three-dimensional diagram of another embodiment of a peristaltic pump provided by the present utility model; DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0028] like Figure 1-Figure 2 As shown, in the first embodiment of the stable micro peristaltic pump of the present invention, the peristaltic pump includes a pump motor 101, a main gear 102, a pump bottom shell 103, a driven gear A104 (104a, 104b), a pressure block A105, a driven gear B106, a middle shell 107, a driven gear C108 (108a, 108b), a pressure block B109, a driven gear D110, a fixing plate 111, a diamond-shaped middle frame 112, a hose 113, a roller 114 (114a, 114b, 114c, 114d), a steel needle 115 (115a, 115b, 115c, 115d), an I-shaped slot 116, and a pump upper cover 117.

[0029] The pump bottom shell 103 is cylindrical in shape, and a through hole is provided in the center of the pump bottom shell 103 , and gear grooves are provided on both sides of the through hole;

[0030] The rotating shaft of the motor 101 passes through the through hole and extends into the pump bottom shell 103 and is fixed with screws;

[0031] The main gear 102 is arranged on the shaft of the motor 101;

[0032] A driven gear A 104 ( 104 a , 104 b ), which is disposed on a gear groove in the pump bottom housing 103 ;

[0033] The pressing block A105 is rectangular, and one side of the pressing block A105 is provided with a cylindrical step. The pressing block A105 is pressed on the driven gear A104 (104a, 104b) in the pump bottom shell 103;

[0034] The driven gear B106 is arranged on the cylindrical step of the pressing block A105 and meshes with the driven gear A104 (104a, 104b);

[0035] The middle shell 107 is cylindrical in shape, with a through hole in the middle and gear grooves on both the upper and lower sides.

[0036] The driven gear C108 (108a, 108b) is installed in the gear groove of the middle housing 107;

[0037] The pressing block B109 is rectangular, with a cylindrical step on one side. The pressing block B109 is pressed on the driven gear C108 (108a, 108b) in the middle shell 107;

[0038] The driven gear D110 is mounted on the cylindrical step of the pressing block B109 and meshes with the driven gear C108 (108a, 108b);

[0039] The fixing plate 111 is cylindrical in shape, with a large through hole in the middle and four small through holes around the large through hole. The large through hole passes through the driven gear D110 and covers the top of the driven gear C108 (108a, 108b) to prevent the gear from shaking.

[0040] The diamond-shaped middle frame 112 is diamond-shaped, with cylindrical frames on both the upper and lower sides, a circular through hole in the internal cavity, and a hose groove on the horizontal side;

[0041] The I-shaped slot 116 is in the shape of an I-shaped character, with four through holes arranged in a square on both the upper and lower sides. It is set in the diamond-shaped middle frame 112, and a gear groove is provided at the bottom of the I-shaped slot 116 to mesh with the driven gear D110;

[0042] The roller 114 (114a, 114b, 114c, 114d) is cylindrical and has a through hole in the middle. The roller is set in the I-shaped groove;

[0043] The steel needle 115 (115a, 115b, 115c, 115d) passes through the through hole of the I-shaped slot 116 and simultaneously passes through the through hole in the middle of the roller 114 (114a, 114b, 114c, 114d), thereby achieving the function of fixing the roller 114 (114a, 114b, 114c, 114d);

[0044] The hose 113 is sleeved on the rollers 114 ( 114 a , 114 b , 114 c , 114 d );

[0045] The pump cover 117 is cylindrical and has a hose groove on one side. The pump cover is placed on the diamond-shaped middle frame 112 and fixed with screws.

[0046] The roller squeezes the hose to form a sealed vacuum liquid extraction environment; the rollers are arranged in a square, and the steel needle is inserted from the end face and fixed on the I-slot. The motor shaft drives the gear to rotate, thereby driving the I-slot to rotate to drive the roller to squeeze the hose, thereby increasing the stability of the I-slot and improving the overall service life of the pump.

[0047] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A peristaltic pump, Its characteristics are: The pump bottom shell is cylindrical in shape, with a through hole in the center and gear grooves on both sides of the through hole; a motor, the shaft of which passes through the through hole and extends into the pump bottom casing and is fixed with screws; a main gear disposed on the shaft of the motor; A driven gear A, which is arranged on a gear groove in the pump bottom shell; A pressure block A is rectangular and has a cylindrical step on one side. The pressure block A is pressed on the driven gear A in the pump bottom shell. A driven gear B, which is arranged on the cylindrical step of the pressing block A and meshes with the driven gear A; The middle shell is cylindrical in shape with a through hole in the middle and gear grooves on the upper and lower sides; A driven gear C, which is installed in the gear groove of the middle housing; A pressing block B is rectangular and has a cylindrical step on one side. The pressing block B is pressed on the driven gear C in the middle housing. A driven gear D, which is mounted on the cylindrical step of the pressing block B and meshes with the driven gear C; The fixed plate is cylindrical in shape, with a large through hole in the middle and four small through holes around it. The large through hole passes through the driven gear D and covers the top of the driven gear C to prevent the gear from shaking. The diamond-shaped middle frame is diamond-shaped, with cylindrical frames on the upper and lower sides, a circular through-hole in the internal cavity, and a hose groove on the horizontal side; The I-shaped slot is in the shape of an "I" character, with four through holes arranged in a square on the upper and lower sides, and is set in the diamond-shaped middle frame. The bottom of the I-shaped slot is provided with a gear groove that meshes with the driven gear D; The roller is cylindrical and has a through hole in the middle, and the roller is arranged in the I-shaped groove; A steel needle passes through the through hole of the I-shaped slot and simultaneously passes through the through hole in the middle of the roller to fix the roller; a hose, which is sleeved on the roller; The pump cover is cylindrical and has a hose groove on one side. The pump cover is placed on the diamond-shaped middle frame and fixed with screws. The roller squeezes the hose to form a sealed vacuum liquid extraction environment; the rollers are arranged in a square, the steel needles are inserted from the end face and fixed on the I-shaped slot, the motor shaft drives the gear to rotate, thereby driving the I-shaped slot to rotate to drive the roller to squeeze the hose.

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