High-stability peristaltic pump

Abstract

The utility model provides a high-stability peristaltic pump. The high-stability peristaltic pump comprises a driving mechanism, a pump cover, a positioning shaft, a roller bracket, a roller and a hose, the pump cover is fixedly connected with the driving mechanism, one end of the roller support is rotatably arranged in the pump cover through a positioning shaft, the positioning shaft is a metal shaft, the other end of the roller support is in transmission connection with the output end of the driving mechanism in a clearance fit mode, a plurality of rollers are rotatably arranged on the roller support, and the hose is arranged on the circumferential side faces of the rollers in a surrounding mode. And the hose is extruded between the peripheral side surface of the roller and the inner wall surface of the pump cover. According to the high-stability peristaltic pump, the positioning shaft is arranged to be a metal shaft, the positioning supporting force is improved, the idler wheel support and the planetary gear are connected in a clearance fit mode, transmission is only achieved, the positioning effect is not achieved, assembly and installation are reduced, the assembly precision is improved, deflection is not prone to occurring, vibration and abnormal sound in the operation process are reduced, and the service life of the peristaltic pump is prolonged. And the stability of the peristaltic pump is improved.

Description

Technical Field

[0001] The utility model relates to the field of peristaltic pumps, in particular to a highly stable peristaltic pump. Background Art

[0002] Peristaltic pump is a pump that conveys fluid by squeezing a hose through the movement of rollers. It is used in many industries such as chemical industry, food and beverage, pharmaceutical, biotechnology, environmental protection, etc., and can meet the needs of various fluid conveying. Peristaltic pump has the advantages of high conveying accuracy, strong corrosion resistance, small shearing effect, simple operation and easy maintenance. Therefore, it is widely used in scientific research, pharmaceutical, chemical, environmental protection, beverage, food, printing and other fields.

[0003] In the prior art, the pump cover is generally made of plastic, and a positioning column for connecting the roller assembly is integrally formed on the inner wall of the pump cover. The positioning column of this structure has a small positioning support force and is easily deflected by force, resulting in inaccurate positioning, poor working stability, and poor performance. At the same time, due to its small positioning support force, the end of the roller assembly away from the positioning column is generally connected to the gear structure for positioning, with more assembly parts and a large cumulative positioning tolerance, which makes the roller assembly more likely to deflect.

[0004] Therefore, it is necessary to provide a highly stable peristaltic pump to solve the above technical problems. Utility Model Content

[0005] The utility model provides a highly stable peristaltic pump to solve the problems of the peristaltic pump in the prior art that a roller assembly is prone to deflection, and the working stability and performance are poor.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a highly stable peristaltic pump, which includes: a driving mechanism, a pump cover, a positioning shaft, a roller bracket, a roller, and a hose;

[0007] The pump cover is fixedly connected to the driving mechanism, the roller bracket is located inside the pump cover, one end of the roller bracket is rotatably connected to the inner wall of the pump cover through the positioning shaft, the positioning shaft is a metal shaft, the other end of the roller bracket is transmission-connected with the output end of the driving mechanism in a clearance-fitting manner, a plurality of rollers are rotatably arranged on the roller bracket, the rotation axis of the rollers is parallel to the rotation axis of the roller bracket, the hose is arranged around the peripheral side surfaces of the plurality of rollers, and the hose is extruded between the peripheral side surfaces of the rollers and the inner wall surface of the pump cover.

[0008] In the utility model, the driving mechanism includes a motor, a gear ring, a planetary gear and a driving gear, the gear ring is fixedly connected to the motor, the pump cover is fixedly connected to the gear ring, the output shaft of the motor extends into the gear ring, the driving gear is fixedly connected to the output shaft of the motor, and a plurality of the planetary gears are transmission-connected between the inner side of the gear ring and the driving gear;

[0009] A connecting column is provided at one end of the roller bracket, and the connecting column is connected to the center of the planetary gear in a clearance fit.

[0010] Wherein, the roller bracket includes an upper fixing plate, a lower fixing plate and a cylindrical portion connected between the upper fixing plate and the lower fixing plate, the positioning shaft is connected in the cylindrical portion, and the roller is rotatably arranged between the upper fixing plate and the lower fixing plate.

[0011] Furthermore, a reinforcement plate is provided between the upper fixing plate and the lower fixing plate, and the reinforcement plate is connected to the cylinder portion at the same time. The connecting column is provided on the lower fixing plate, and the position of the connecting column is opposite to the position of the reinforcement plate.

[0012] In addition, the upper fixing plate, the lower fixing plate, the barrel portion, the reinforcing plate, and the connecting column are an integrally formed structure.

[0013] In the utility model, a reinforcing convex portion is arranged on the inner wall of the pump cover, the positioning shaft is connected inside the reinforcing convex portion, and a avoiding groove corresponding to the reinforcing convex portion is arranged on the roller bracket.

[0014] In the utility model, the two ends of the hose are respectively connected to an input connector and an output connector, the input connector and the output connector are limited between the pump cover and the gear ring, the pump cover and the gear ring are fixed by screws, and the screws are located between the input connector and the output connector.

[0015] Among them, snap plates are arranged on both sides of the pump cover, and the two snap plates are respectively located on the side where the input connector and the output connector are away from each other, and fixing grooves cooperating with the snap plates are arranged on both sides of the gear ring, and clamping blocks for clamping with the snap plates are arranged in the fixing grooves.

[0016] In addition, an inner side wall of the pump cover is provided with an arc surface corresponding to the movable tracks of the multiple rollers. The pump cover also includes an input cylinder for accommodating the input connector and an output cylinder for accommodating the output connector. A first side wall connected to one end of the arc surface is provided in the input cylinder, and a second side wall connected to the other end of the arc surface is provided in the output cylinder. The first side wall is intersected and connected to the arc surface, and the second side wall is tangently connected to the arc surface.

[0017] Furthermore, a first limit plate for limiting the input joint is provided on the gear ring, and the first limit extends into the input cylinder. A second limit plate for limiting the output joint is provided on the gear ring, and the second limit extends into the output cylinder.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the high-stability peristaltic pump of the utility model improves the positioning support force by setting the positioning shaft as a metal shaft, and connects the roller bracket and the planetary gear with clearance fit, which only performs transmission and has no positioning effect, reduces assembly and installation, improves assembly accuracy, is less prone to deflection, reduces vibration and abnormal noise during operation, and improves the stability of the peristaltic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the utility model.

[0020] Figure 1 This is a schematic diagram of the exploded structure of the highly stable peristaltic pump of the utility model.

[0021] Figure 2 It is a vertical cross-sectional view of the highly stable peristaltic pump of the utility model.

[0022] Figure 3 It is a transverse cross-sectional view of the highly stable peristaltic pump of the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] Directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only used for reference to the directions of the drawings. The directional terms used are used to illustrate and understand the present invention, and are not used to limit the present invention.

[0025] The words "first", "second" and the like in the terminology of the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be construed as limiting the order of precedence.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, the connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the prior art, the pump cover is generally made of plastic, and a positioning column for connecting the roller assembly is integrally formed on the inner wall of the pump cover. The positioning column of this structure has a small positioning support force and is easily deflected by force, resulting in inaccurate positioning, poor working stability, and poor performance. At the same time, due to its small positioning support force, the end of the roller assembly away from the positioning column is generally connected to the gear structure for positioning, with more assembly parts and a large cumulative positioning tolerance, which makes the roller assembly more likely to deflect.

[0028] The following is a preferred embodiment of a highly stable peristaltic pump provided by the utility model that can solve the above technical problems.

[0029] Please refer to Figure 1 ,in Figure 1 This is a schematic diagram of the exploded structure of the highly stable peristaltic pump of the utility model.

[0030] In the figures, structurally similar elements are denoted by the same reference numerals.

[0031] The utility model provides a highly stable peristaltic pump, which comprises a driving mechanism 11, a pump cover 12, a positioning shaft 13, a roller bracket 14, a roller 15, and a hose 16.

[0032] The pump cover 12 is fixedly connected to the driving mechanism 11, and the roller bracket 14 is located inside the pump cover 12. One end of the roller bracket 14 is rotatably connected to the inner wall of the pump cover 12 through a positioning shaft 13. The positioning shaft 13 is a metal shaft, which can provide a strong positioning support force for the roller bracket 14. The other end of the roller bracket 14 is connected to the output end of the driving mechanism 11 in a transmission manner with a clearance fit. Only transmission is performed between the roller bracket 14 and the output end of the driving mechanism 11, and no positioning effect is provided. This reduces assembly and installation, improves assembly accuracy, makes it less likely to deflect, reduces vibration and abnormal noise during operation, and improves the stability of the peristaltic pump.

[0033] Among them, multiple rollers 15 are rotatably arranged on the roller bracket 14, and the rotation axis of the roller 15 is parallel to the rotation axis of the roller bracket 14. The hose 16 is surrounded by the peripheral side surfaces of the multiple rollers 15, and the hose 16 is squeezed between the peripheral side surfaces of the rollers 15 and the inner wall surface of the pump cover 12. The roller bracket 14 rotates to squeeze the hose 16 through the rollers 15, thereby pumping out the fluid.

[0034] In this embodiment, the driving mechanism 11 includes a motor (the reference numeral 11 also refers to a motor), a ring gear 111, planetary gears 112 and a driving gear 113. The ring gear 111 is fixedly connected to the motor, the pump cover 12 is fixedly connected to the ring gear 111, the output shaft of the motor extends into the ring gear 111, the driving gear 113 is fixedly connected to the output shaft of the motor, and a plurality of planetary gears 112 are transmission-connected between the inner side of the ring gear 111 and the driving gear 113.

[0035] A connecting column 145 is disposed at one end of the roller bracket 14 . The connecting column 145 is connected to the center of the planetary gear 112 in a clearance fit. The motor drives the plurality of planetary gears 112 to rotate, thereby driving the roller bracket 14 to rotate.

[0036] Please refer to Figure 1 and Figure 2 , wherein the roller bracket 14 includes an upper fixing plate 141, a lower fixing plate 142 and a barrel portion 143 connected between the upper fixing plate 141 and the lower fixing plate 142, the positioning shaft 13 is connected in the barrel portion 143, and the roller 15 is rotatably arranged between the upper fixing plate 141 and the lower fixing plate 142.

[0037] Furthermore, a reinforcing plate 144 is provided between the upper fixing plate 141 and the lower fixing plate 142 , and the reinforcing plate 144 is connected to the cylinder portion 143 . A connecting column 145 is provided on the lower fixing plate 142 , and the position of the connecting column 145 is opposite to that of the reinforcing plate 144 , so that the structure is very stable.

[0038] In this embodiment, the upper fixing plate 141, the lower fixing plate 142, the barrel portion 143, the reinforcing plate 144, and the connecting column 145 are an integrally formed structure, which is stable and requires little assembly.

[0039] Please refer to Figure 2 In this embodiment, a reinforcing protrusion 124 is provided on the inner wall of the pump cover 12, the positioning shaft 13 is connected in the reinforcing protrusion 124, and a avoiding groove 146 corresponding to the reinforcing protrusion 124 is provided on the roller bracket 14, so that the connection between the positioning shaft 13 and the pump cover 12 is very stable and the strength of the connection is high.

[0040] In this embodiment, the two ends of the hose 16 are respectively connected to the input connector 17 and the output connector 18, and the input connector 17 and the output connector 18 are restricted between the pump cover 12 and the ring gear 111. The pump cover 12 and the ring gear 111 are fixed by screws 19, and the screws 19 are located between the input connector 17 and the output connector 18.

[0041] Among them, snap plates 123 are arranged on both sides of the pump cover 12, and the two snap plates 123 are respectively located on the side away from each other of the input connector 17 and the output connector 18, and fixing grooves cooperating with the snap plates 123 are arranged on both sides of the gear ring 111, and a clamping block 1111 for clamping with the snap plate 123 is arranged in the fixing groove.

[0042] Please refer to Figure 3 In this embodiment, the inner side wall of the pump cover 12 is provided with an arc surface 125 corresponding to the moving tracks of the plurality of rollers 15. The pump cover 12 also includes an input cylinder 121 for accommodating the input connector 17 and an output cylinder 122 for accommodating the output connector 18. A first side wall 1211 connected to one end of the arc surface 125 is provided in the input cylinder 121, and a second side wall 1221 connected to the other end of the arc surface 125 is provided in the output cylinder 122. The first side wall 1211 intersects and connects with the arc surface 125, thereby increasing the pumping force of the roller 15 when rolling the hose 16. Figure 3 The second side wall 1221 is tangentially connected to the arc surface 125. Figure 3 At A in the figure, the bending of the hose 16 on the inner wall of the pump cover 12 can be reduced, the back pressure of the water channel can be reduced, the risk of pipe breakage can be reduced, and the reliability of the peristaltic pump can be improved.

[0043] Please refer to Figure 1 In this embodiment, a first limit plate 1112 for limiting the input joint 17 is provided on the ring gear 111, and the first limit extends in the input cylinder 121, and is used to limit the input joint 17, and also facilitates the assembly of the pump cover 12 and the ring gear 111. A second limit plate 1113 for limiting the output joint 18 is provided on the ring gear 111, and the second limit extends in the output cylinder 122, and is used to limit the output joint 18, and also facilitates the assembly of the pump cover 12 and the ring gear 111.

[0044] A highly stable peristaltic pump in this preferred embodiment improves the positioning support force by setting the positioning shaft as a metal shaft, and connects the roller bracket to the planetary gear with a clearance fit, which only performs transmission and has no positioning effect, reduces assembly and installation, improves assembly accuracy, is less prone to deflection, reduces vibration and abnormal noise during operation, improves the stability of the peristaltic pump, and increases the life of the peristaltic pump.

[0045] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A highly stable peristaltic pump, characterized in that: include: Drive mechanism, pump cover, positioning shaft, roller bracket, roller, and hose; The pump cover is fixedly connected to the driving mechanism, the roller bracket is located inside the pump cover, one end of the roller bracket is rotatably connected to the inner wall of the pump cover through the positioning shaft, the positioning shaft is a metal shaft, the other end of the roller bracket is transmission-connected with the output end of the driving mechanism in a clearance-fitting manner, a plurality of rollers are rotatably arranged on the roller bracket, the rotation axis of the rollers is parallel to the rotation axis of the roller bracket, the hose is arranged around the peripheral side surfaces of the plurality of rollers, and the hose is extruded between the peripheral side surfaces of the rollers and the inner wall surface of the pump cover.

2. The highly stable peristaltic pump according to claim 1, characterized in that: The driving mechanism comprises a motor, a gear ring, a planetary gear and a driving gear, wherein the gear ring is fixedly connected to the motor, the pump cover is fixedly connected to the gear ring, the output shaft of the motor extends into the gear ring, the driving gear is fixedly connected to the output shaft of the motor, and a plurality of the planetary gears are drivingly connected between the inner side of the gear ring and the driving gear; A connecting column is provided at one end of the roller bracket, and the connecting column is connected to the center of the planetary gear in a clearance fit.

3. The highly stable peristaltic pump according to claim 2, characterized in that: The roller bracket includes an upper fixing plate, a lower fixing plate and a barrel portion connected between the upper fixing plate and the lower fixing plate, the positioning shaft is connected in the barrel portion, and the roller is rotatably arranged between the upper fixing plate and the lower fixing plate.

4. The highly stable peristaltic pump according to claim 3, characterized in that: A reinforcing plate is further arranged between the upper fixing plate and the lower fixing plate, and the reinforcing plate is connected to the cylinder portion at the same time. The connecting column is arranged on the lower fixing plate, and the position of the connecting column is opposite to the position of the reinforcing plate.

5. The highly stable peristaltic pump according to claim 4, characterized in that: The upper fixing plate, the lower fixing plate, the barrel portion, the reinforcing plate, and the connecting column are an integrally formed structure.

6. The highly stable peristaltic pump according to claim 1, characterized in that: A reinforcement convex portion is arranged on the inner wall of the pump cover, the positioning shaft is connected inside the reinforcement convex portion, and a avoidance groove corresponding to the reinforcement convex portion is arranged on the roller bracket.

7. The highly stable peristaltic pump according to claim 2, characterized in that: The two ends of the hose are respectively connected to an input connector and an output connector, and the input connector and the output connector are limited between the pump cover and the gear ring. The pump cover and the gear ring are fixed by screws, and the screws are located between the input connector and the output connector.

8. The highly stable peristaltic pump according to claim 7, characterized in that: Snap plates are arranged on both sides of the pump cover, and the two snap plates are respectively located on the side where the input connector and the output connector are away from each other. Fixing grooves cooperating with the snap plates are arranged on both sides of the gear ring, and clamping blocks for clamping with the snap plates are arranged in the fixing grooves.

9. The highly stable peristaltic pump according to claim 7, characterized in that: The inner side wall of the pump cover is provided with an arc surface corresponding to the movable tracks of the multiple rollers. The pump cover also includes an input cylinder for accommodating the input connector and an output cylinder for accommodating the output connector. A first side wall connected to one end of the arc surface is provided in the input cylinder, and a second side wall connected to the other end of the arc surface is provided in the output cylinder. The first side wall intersects and is connected to the arc surface, and the second side wall is tangently connected to the arc surface.

10. The highly stable peristaltic pump according to claim 9, characterized in that: The gear ring is provided with a first limit plate for limiting the input joint, the first limit extends within the input cylinder, and the gear ring is provided with a second limit plate for limiting the output joint, the second limit extends within the output cylinder.

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