An electric gear pump

Abstract

The utility model relates to gear pump technical field discloses a kind of electric gear pumps, including pump body, water pipe for being used to sleeve hose is fixed on pump body, water pipe outside is equipped with the fixed pipe being fixedly connected with pump body;Multiple push rods are installed on the fixed pipe along the radial sliding, multiple push rods are evenly distributed along the circumference of fixed pipe;One is fixedly arranged on each push rod and is used to the pressing plate for pressing hose on water pipe;Rotary ring and fixed ring are sleeved on the fixed pipe, and fixed ring is fixedly connected with fixed pipe;Rotary ring is rotatably connected with fixed pipe, and torsion spring is fixed between rotary ring and fixed ring and is sleeved on fixed pipe;Transmission member for driving multiple push rods to slide synchronously close to water pipe is provided between rotary ring and multiple push rods;Limiting member for limiting rotary ring to return to original position is installed on fixed ring.The utility model rotates rotary ring, drives push rod to slide close to water pipe along fixed pipe by transmission member, to drive pressing plate to press hose on water pipe, easy to operate, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and in particular to an electric gear pump. Background Technology

[0002] An electric gear pump is a positive displacement fluid transport machine that uses a motor to drive one or more pairs of gears to rotate. The periodic change in the volume between the gear teeth generates vacuum suction and discharge pressure, thereby realizing the intake, transport and discharge of liquids.

[0003] A gear pump as described in announcement number CN218207064U includes a housing with an oil chamber. A drive shaft and a driven shaft are rotatably connected inside the housing. A drive gear and a driven gear are respectively provided on the drive shaft and the driven shaft, and the two mesh to form a linkage. Oil hole connectors are respectively provided at both ends of the housing, and connecting pipes are respectively provided on the oil hole connectors. An oil inlet channel is provided inside the connecting pipe for oil supply. A central pipe is provided at the end of the connecting pipe away from the housing, located in the oil inlet channel. The diameter of the central pipe is smaller than the inner diameter of the connecting pipe. At least one elastic clamp is provided on the inner wall of the connecting pipe corresponding to the position of the central pipe. The lower end of the elastic clamp is used to squeeze the hose located on the central pipe, and there is a gap between the lower end face of the elastic clamp and the outer wall of the central pipe.

[0004] Based on the above technical features, the problem is that in the existing technology, it is necessary to operate the elastic clips one by one to squeeze the hose on the central tube, which is complicated and inconvenient to use.

[0005] Therefore, it is necessary to solve the above problems by using an electric gear pump. Utility Model Content

[0006] The purpose of this invention is to provide an electric gear pump to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an electric gear pump, comprising a pump body, wherein a water pipe for connecting a flexible hose is fixedly disposed on the pump body, and a fixed pipe fixedly connected to the pump body is sleeved on the outside of the water pipe.

[0008] Multiple push rods are slidably mounted radially on the fixed tube, and the multiple push rods are evenly distributed around the circumference of the fixed tube; each push rod is fixedly provided with a pressure plate near the end of the water pipe for pressing the hose onto the water pipe;

[0009] A rotating ring and a fixed ring are fitted onto the fixed tube, and the fixed ring is fixedly connected to the fixed tube; the rotating ring is rotatably connected to the fixed tube, and a torsion spring fitted onto the fixed tube is fixedly provided between the rotating ring and the fixed ring.

[0010] A transmission component is provided between the rotating ring and the multiple push rods to drive the multiple push rods to slide synchronously along the radial direction of the fixed pipe towards the water pipe;

[0011] The fixed ring is equipped with a limiting device to restrict the rotation and reset of the rotating ring.

[0012] Preferably, the transmission component includes a sliding shaft and a transmission groove; multiple transmission grooves are formed along the axial direction on the rotating ring, and the multiple transmission grooves are evenly distributed along the circumference of the rotating ring; a sliding shaft parallel to the fixed tube is fixedly installed on each push rod, and the multiple sliding shafts correspond one-to-one with the multiple transmission grooves; each sliding shaft is inserted into the corresponding transmission groove and is in a limiting sliding fit with the corresponding transmission groove, and each sliding shaft is in abutting transmission fit with the rotating ring.

[0013] Preferably, the transmission groove is an arc-shaped groove, with the two ends of the arc-shaped groove located on different diameters and different circumferences of the rotating ring.

[0014] Preferably, the push rod is a square rod; the push rod extends radially out of the fixed tube and slides in a limiting fit with the fixed tube.

[0015] Preferably, the pressure plate is an arc-shaped plate, which is arranged along the circumference of the water pipe.

[0016] Preferably, the limiting component includes a limiting rod, which is parallel to the fixed tube; the limiting rod passes through the fixed ring and is slidably connected to the fixed ring; the rotating ring has a plurality of limiting slots along the axial direction for limiting insertion with the limiting rod, and the plurality of limiting slots are equally spaced along the circumference of the fixed tube.

[0017] Preferably, a limiting cap is fixedly provided at the end of the limiting rod away from the rotating ring; a spring is sleeved on the limiting rod, and the spring is fixed between the limiting cap and the fixing ring.

[0018] Preferably, the notch of the limiting slot is provided with a notch, and the notch is provided with a relief slope for limiting the insertion rod to make way when the pressure plate is close to the water pipe; the end of the limiting insertion rod that is inserted into the limiting slot is provided with a transmission cone surface for sliding contact with the relief slope.

[0019] The technical effects and advantages of this utility model are as follows: The rotating ring of this utility model drives the push rod to slide radially along the fixed pipe and approach the water pipe through the transmission component, thereby driving the pressure plate to press the hose onto the water pipe. The operation is simple and convenient. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the fixing tube of this utility model;

[0022] Figure 3 This is a schematic diagram of the interior of the rotating ring and the fixed ring of this utility model;

[0023] Figure 4 This is a schematic diagram of the limiting component of this utility model.

[0024] In the diagram: 1. Pump body; 2. Water pipe; 3. Fixed pipe; 4. Rotating ring; 5. Transmission groove; 6. Sliding shaft; 7. Push rod; 8. Pressure plate; 9. Fixed ring; 10. Torsion spring; 11. Limiting rod; 12. Spring; 13. Limiting slot. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figures 1 to 4 The electric gear pump shown includes a pump body 1, a water pipe 2 fixedly mounted on the pump body 1, and an external flexible hose sleeved on the water pipe 2. A fixed pipe 3 is sleeved on the outside of the water pipe 2, and the fixed pipe 3 is fixedly connected to the pump body 1. The flexible hose is inserted into the fixed pipe 3.

[0027] Multiple push rods 7, each being a square rod, are radially slidably mounted on the fixed tube 3. The push rods 7 extend radially out of the fixed tube 3 and engage with it in a limiting sliding fit. The multiple push rods 7 are evenly distributed circumferentially along the fixed tube 3.

[0028] Each push rod 7 has a pressure plate 8 fixedly installed near the end of the water pipe 2. Each pressure plate 8 is an arc-shaped plate arranged around the circumference of the water pipe 2. Multiple pressure plates 8 cooperate with each other to press the hose tightly onto the water pipe 2. A rubber pad for hose anti-slip and cushioning protection is fixedly installed on the inner side of each pressure plate 8.

[0029] A rotating ring 4 and a fixed ring 9 are fitted onto the fixed tube 3. The fixed ring 9 is fixedly connected to the fixed tube 3. The rotating ring 4 is rotatably connected to the fixed tube 3. A torsion spring 10 is provided between the rotating ring 4 and the fixed ring 9, and the torsion spring 10 is fitted onto the fixed tube 3. The rotating ring 4 is located between the push rod 7 and the fixed ring 9. A circumferential groove is formed at the end of the fixed ring 9 near the rotating ring 4, and the torsion spring 10 is located in the groove. One end of the torsion spring 10 is fixedly connected to the fixed ring 9, and the other end of the torsion spring 10 is fixedly connected to the rotating ring 4.

[0030] A transmission component is provided between the rotating ring 4 and multiple push rods 7. The transmission component is used to drive the multiple push rods 7 to slide synchronously along the radial direction of the fixed pipe 3 towards the water pipe 2.

[0031] Specifically, the transmission components include a sliding shaft 6 and a transmission groove 5.

[0032] Multiple transmission grooves 5 are formed along the axial direction on the rotating ring 4, and the multiple transmission grooves 5 are evenly distributed along the circumference of the rotating ring 4. Each transmission groove 5 is an arc-shaped groove; taking one arc-shaped groove as an example, the two ends of the arc-shaped groove are located on different diameters and different circumferences of the rotating ring 4.

[0033] Each push rod 7 has a sliding shaft 6 fixedly installed at the end away from the connected pressure plate 8, which is parallel to the fixed tube 3. Multiple sliding shafts 6 correspond one-to-one with multiple transmission grooves 5. Each sliding shaft 6 is inserted into the corresponding transmission groove 5 and is in a limiting sliding fit with the corresponding transmission groove 5. Each sliding shaft 6 is in abutting and transmission fit with the rotating ring 4.

[0034] A limiting component is installed on the fixed ring 9. The limiting component is used to restrict the rotation ring 4 from resetting after the pressure plate 8 presses the hose onto the water pipe 2.

[0035] Specifically, the limiting component includes a limiting rod 11, which is parallel to the fixing tube 3. The limiting rod 11 passes through the fixing ring 9 and is slidably connected to the fixing ring 9, and is located outside the ring groove. A plurality of limiting slots 13 are formed on the rotating ring 4 along the axial direction for limiting insertion with the limiting rod 11, and the plurality of limiting slots 13 are equally spaced along the circumference of the fixing tube 3.

[0036] A limiting cap is fixedly installed at the end of the limiting rod 11 away from the rotating ring 4. A spring 12 is sleeved on the limiting rod 11. One end of the spring 12 is fixedly connected to the limiting cap, and the other end is fixedly connected to the fixing ring 9.

[0037] Each limiting slot 13 has a notch at its opening, and a clearance slope is provided at the notch. The clearance slope is used to allow the limiting rod 11 to move upward when the pressure plate 8 approaches the water pipe 2. The end of the limiting rod 11 that inserts into the limiting slot 13 has a transmission slope. The transmission slope is used to slide against the clearance slope when the pressure plate 8 approaches the water pipe 2.

[0038] Working principle: In the initial state, the torsion spring 10 is in a naturally relaxed state. Under the elastic force of the spring 12, the limiting rod 11 is initially inserted into one of the limiting slots 13 on the rotating ring 4. At this time, the pressure plate 8 is in a position away from the water pipe 2, which makes it convenient to put the external hose on the water pipe 2 and make the hose and the fixed pipe 3 form an initial insertion fit.

[0039] When it is necessary to fix the hose, manually rotate the rotating ring 4. The rotating ring 4 rotates circumferentially relative to the fixed pipe 3. At the same time, the torsion spring 10 between the rotating ring 4 and the fixed ring 9 is twisted and stores force. During the rotation of the rotating ring 4, the circumferentially distributed transmission grooves 5 rotate synchronously. Since the sliding shaft 6 is fixed on the push rod 7 and inserted into the corresponding transmission groove 5, and the transmission groove 5 is an arc-shaped groove, with the two ends of the arc-shaped groove located on different diameters and different circumferences of the rotating ring 4, the inner wall of the transmission groove 5 will generate a radial thrust on the sliding shaft 6, forcing the sliding shaft 6 to drive the push rod 7 to slide along the radial direction of the fixed pipe 3 towards the water pipe 2. During this process, since the push rod 7 is a square rod, it forms a limiting sliding fit with the fixed pipe 3 to ensure the stability of the sliding direction.

[0040] When push rod 7 slides, pressure plate 8 near the end of water pipe 2 moves synchronously towards water pipe 2. Multiple circumferentially distributed pressure plates 8 simultaneously squeeze from all sides of the hose, tightly pressing the hose against the outer wall of water pipe 2, thus achieving a sealed fixation between the hose and water pipe 2. During this process, when rotating ring 4 rotates, the clearance slope of limit slot 13 slides against the transmission cone surface of limit rod 11. The clearance slope pushes limit rod 11 to move away from rotating ring 4, and spring 12 is compressed. When pressure plate 8 presses the hose to the preset sealing degree, limit rod 11 is precisely inserted into the corresponding limit slot 13 under the elastic force of spring 12, restricting rotating ring 4 from rotating back to its original position, thereby maintaining the continuous pressing state of pressure plate 8 on the hose. At this time, pump body 1 can start working normally—driving the internal gears to mesh and rotate through the motor, using the periodic change of the volume between the gear teeth to generate vacuum suction and discharge, realizing the suction, delivery and discharge of liquid along water pipe 2 and hose.

[0041] When it is necessary to disassemble the hose, manually pull the limit cap at the end of the limit plug 11. The limit plug 11 overcomes the elastic force of the spring 12 and slides away from the rotating ring 4, and its end disengages from the limit slot 13. At this time, the stored force of the torsion spring 10 is released, which drives the rotating ring 4 to rotate back and reset. The transmission groove 5 rotates in the opposite direction at the same time. Through the sliding shaft 6, the push rod 7 is pulled to slide along the radial direction of the fixed tube 3 away from the water pipe 2. The pressure plate 8 then disengages from the surface of the hose, releasing the pressure restriction on the hose, and the hose can be easily removed from the water pipe 2.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric gear pump, comprising a pump body (1), characterized in that: A water pipe (2) for connecting a flexible hose is fixedly installed on the pump body (1), and a fixed pipe (3) that is fixedly connected to the pump body (1) is fitted on the outside of the water pipe (2). Multiple push rods (7) are slidably installed radially on the fixed tube (3), and the multiple push rods (7) are evenly distributed around the circumference of the fixed tube (3); each push rod (7) is fixedly provided with a pressure plate (8) for pressing the hose onto the water pipe (2) at the end near the water pipe (2); A rotating ring (4) and a fixed ring (9) are fitted on the fixed tube (3), and the fixed ring (9) is fixedly connected to the fixed tube (3); the rotating ring (4) is rotatably connected to the fixed tube (3), and a torsion spring (10) fitted on the fixed tube (3) is fixedly provided between the rotating ring (4) and the fixed ring (9); A transmission component is provided between the rotating ring (4) and the multiple push rods (7) to drive the multiple push rods (7) to slide synchronously along the fixed pipe (3) towards the water pipe (2); The fixed ring (9) is equipped with a limiting member for restricting the rotation and reset of the rotating ring (4).

2. An electric gear pump according to claim 1, characterized in that: The transmission component includes a sliding shaft (6) and a transmission groove (5); multiple transmission grooves (5) are opened along the axial direction on the rotating ring (4), and the multiple transmission grooves (5) are evenly distributed along the circumference of the rotating ring (4); a sliding shaft (6) parallel to the fixed tube (3) is fixedly installed on each push rod (7), and multiple sliding shafts (6) correspond one-to-one with multiple transmission grooves (5); each sliding shaft (6) is inserted into the corresponding transmission groove (5) and is limited and slidably engaged with the corresponding transmission groove (5), and each sliding shaft (6) is in abutting and transmission engagement with the rotating ring (4).

3. An electric gear pump according to claim 2, characterized in that: The transmission groove (5) is an arc-shaped groove, and the two ends of the arc-shaped groove are located on different diameters and different circumferences of the rotating ring (4).

4. An electric gear pump according to claim 2, characterized in that: The push rod (7) is a square rod; the push rod (7) extends radially through the fixed tube (3) and slides in a limiting manner with the fixed tube (3).

5. An electric gear pump according to claim 2, characterized in that: The pressure plate (8) is an arc-shaped plate, which is arranged along the circumference of the water pipe (2).

6. An electric gear pump according to claim 1, characterized in that: The limiting component includes a limiting rod (11), which is parallel to the fixed tube (3); the limiting rod (11) passes through the fixed ring (9) and is slidably connected to the fixed ring (9); the rotating ring (4) has several limiting slots (13) opened along the axial direction for limiting insertion with the limiting rod (11), and the several limiting slots (13) are equally spaced along the circumference of the fixed tube (3).

7. An electric gear pump according to claim 6, characterized in that: A limiting cap is fixedly installed at the end of the limiting rod (11) away from the rotating ring (4); a spring (12) is sleeved on the limiting rod (11), and the spring (12) is fixed between the limiting cap and the fixing ring (9).

8. An electric gear pump according to claim 7, characterized in that: The notch of the limiting slot (13) is provided with a notch and a clearance slope is provided at the notch to allow the limiting rod (11) to make way when the pressure plate (8) is close to the water pipe (2); the end of the limiting rod (11) that is inserted into the limiting slot (13) is provided with a transmission cone surface for sliding contact with the clearance slope.

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