Speed-increasing multi-gear variable-speed water pump

Abstract

The utility model discloses a speed-increasing multi-gear variable-speed water pump, and relates to the technical field of water pumps, a spline main shaft main body is located in a shell and is rotatably connected with the shell, one end of a spline main shaft extends to the outside of the shell to be connected with a driving device, and a plurality of shifting gears are arranged along the spline main shaft and have different diameters; the water pump main shaft and the spline main shaft are arranged in parallel, one end of the water pump main shaft extends into the pump body to drive the pump body to operate, a plurality of driven gears different in diameter and meshed with the gear shifting gear are fixed to the water pump main shaft, and the gear shifting assembly extends into the shell from the exterior of the shell and then is connected with the gear shifting gear. The gear shifting assembly is pulled to drive the gear shifting gear to be meshed with or separated from the driven gear to achieve gear shifting, and the diameter of the gear shifting gear is larger than that of the driven gear. The multi-gear speed change function of the water pump is achieved through the speed-increasing gear box comprising the shifting gears with different diameters and the driven gear matched with the speed-increasing gear box. Through cooperation of the cooling water tank and the circulating water channel, the water pump is effectively cooled, and the service life of the water pump is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, specifically to a variable speed water pump with multiple speed increments. Background Technology

[0002] In existing water pump technology, most pumps are designed with a fixed speed and a fixed flow rate, which cannot meet the needs of varying flow and pressure under different operating conditions. Although there are some adjustable-speed pumps on the market, their adjustment range is limited and their efficiency is low, making them difficult to adapt to various application scenarios. The limitations of traditional pumps are particularly evident in water treatment systems that require frequent adjustments to flow and pressure.

[0003] Currently, some variable speed water pumps exist on the market, but most use frequency conversion speed regulation of the motor to achieve speed variation. While this method can achieve relatively precise speed control, it is costly and requires high-performance motors. In addition, some water pumps use belt pulley drives and adjust the speed ratio to achieve speed increase. Although this method is relatively low-cost, it has limited speed ranges and the shifting operation is complex and inflexible.

[0004] Therefore, the development of a multi-speed variable water pump with different speeds has become an urgent problem to be solved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a multi-speed variable water pump with a speed increase gearbox to achieve multi-speed change function. At the same time, a self-cooling structure is designed at the connection between the speed increase gearbox and the pump body to meet the flow requirements under different working conditions and extend the service life of the water pump.

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a multi-speed variable water pump with increasing speed, including a speed-increasing gearbox and a pump body detachably connected thereto; the speed-increasing gearbox includes a housing, a splined main shaft, shift gears, a shift assembly, and a water pump main shaft, the main body of the splined main shaft is located inside the housing and rotatably connected to the housing, one end of the splined main shaft extends to the outside of the housing and connects to a drive device, several shift gears with different diameters are provided along the splined main shaft, the water pump main shaft is arranged parallel to the splined main shaft and one end of the water pump main shaft extends into the pump body to drive the pump body to run, several driven gears with different diameters are fixed on the water pump main shaft to mesh with the shift gears, the shift assembly extends from the outside of the housing to the inside and connects to the shift gears, and shifting is achieved by pulling the shift assembly to drive the shift gears to mesh or disengage with the driven gears, the diameter of the shift gears is larger than that of the driven gears.

[0007] Furthermore, the shift gear is provided, and the driven gear is also provided, wherein the shift gear meshes with or disengages from the driven gear.

[0008] Furthermore, the shift assembly includes a shift lever, a shift sleeve, and a shift handle; the shift sleeve is fixed to the outside of the housing, the shift lever is disposed inside the shift sleeve and its end is connected to the outermost shift gear, the shift sleeve is provided with a plurality of shift slots and a sliding groove between the shift slots is provided to allow the shift handle to move.

[0009] The gear shift lever includes a fixed handle, a spring, and a gear position fixing sleeve. The fixed handle passes through the gear position groove and connects to the gear shift lever. The gear position fixing sleeve is fitted outside the fixed handle, and the diameter of the end of the gear position fixing sleeve that contacts the gear position groove is greater than the diameter of the sliding groove and less than or equal to the diameter of the gear position groove. The spring is fitted outside the fixed handle and inside the gear position fixing sleeve. One end of the spring is connected to the end of the fixed handle, and the other end is connected to the inner wall of the gear position fixing sleeve.

[0010] Furthermore, at least two shift gears are provided. The shift gears are slidably connected to the splined main shaft. The shift gears are interconnected and operate synchronously. When one shift gear is engaged with the driven gear, the other shift gears idle.

[0011] Furthermore, the shift gear has two gears, namely a first gear and a second gear, the diameter of the first gear is smaller than that of the second gear, and the driven gear has two gears, namely a first driven wheel and a second driven wheel, the first driven wheel and the first gear are arranged on the same side and mesh with each other for transmission;

[0012] The gear slot has two slots, namely a first gear slot and a second gear slot.

[0013] Furthermore, the shift gears include three gears: a first gear, a second gear, and a third gear. The diameter of the first gear is smaller than that of the second gear, the diameter of the second gear is smaller than that of the third gear, and the third gear is positioned between the first gear and the second gear. The driven gears include three gears: a first-gear driven wheel, a second-gear driven wheel, and a third-gear driven wheel. The third-gear driven wheel is positioned between the first-gear driven wheel and the second-gear driven wheel. The first-gear driven wheel is located on the same side as the first gear and meshes with it for transmission.

[0014] The gear slot has three slots, namely a first gear slot, a second gear slot, and a third gear slot, with the third gear slot located between the first gear slot and the second gear slot.

[0015] Furthermore, the shift gears are provided in two parts, namely a driving shift gear and a driven shift gear. The driving shift gear is slidably connected to the splined main shaft and rotates synchronously. The driven shift gear is sleeved on the outside of the splined main shaft and rotatably connected to it. The shift assembly extends from the outside of the housing to the inside and is connected to the driving shift gear. The driving shift gear has a driving engagement tooth on the side near the driven shift gear, and the driven shift gear has a driven engagement tooth on the side near the driving shift gear.

[0016] The driven gear has two parts, namely a first driven wheel and a second driven wheel. The first driven wheel is arranged on the same side as the driving shift gear and meshes with it for transmission. The second driven wheel is arranged on the same side as the driven shift gear, and after the driving engagement teeth and the driven engagement teeth mesh, the second driven wheel meshes with the driven shift gear for transmission.

[0017] Furthermore, the pump body includes a connecting flange and a pump chamber. The connecting flange is detachably connected to the housing of the speed-increasing gearbox and is fitted outside the pump main shaft. The pump main shaft is rotatably connected to the housing via a bearing. The side wall of the connecting flange is provided with a circulating water channel communicating with the pump chamber. The outer wall of the housing is provided with a cooling water tank connected to the circulating water channel. The cooling water tank surrounds the outside of the bearing.

[0018] Furthermore, the power input end of the water pump main shaft is provided with a power input component for connecting an external drive device; the pump chamber is provided with a pumping turbine connected to the power output end of the water pump main shaft, the pump chamber is provided with an inlet channel on the axial outer side of the water pump main shaft, and the pump chamber is provided with an outlet channel on the circumferential outer side of the pumping turbine; the pumping turbine is provided with one or two in a nested connection.

[0019] Furthermore, the water pump spindles are arranged symmetrically about the spline spindles in two rows, and each water pump spindle is connected to a pump chamber through a connecting flange; the shift gears on the spline spindles mesh with the driven gears on the two water pump spindles on both sides respectively.

[0020] The advantages of this utility model compared with the prior art are as follows:

[0021] This invention achieves multi-speed regulation for a water pump by using a speed-increasing gearbox containing gears of different diameters and matching driven gears. Users can select different gears by pulling the shift lever to adjust the pump's speed and flow rate, meeting the needs of various operating conditions.

[0022] Because the diameter of the shift gear is larger than that of the driven gear, when the two mesh, a speed-increasing effect is achieved, improving the working efficiency of the water pump. This design not only allows the water pump to provide sufficient torque at low speeds, but also enables it to achieve higher speeds and flow rates at high speeds.

[0023] This invention incorporates a cooling water tank on the outer wall of the speed-increasing gearbox, which is connected to a circulating water channel inside the side wall of the connecting flange. This design effectively reduces the heat generated by the water pump during operation, extends the pump's service life, and improves its operational stability.

[0024] The pump body and the speed-increasing gearbox of this invention are connected in a detachable manner, which allows users to easily disassemble and replace the pump body or speed-increasing gearbox when needed, reducing maintenance costs and time.

[0025] The water pump spindle of this invention can be designed in two rows, with each row connected to a pump chamber. The drive gear on the splined spindle meshes with the driven gear for power transmission. This design allows the water pump to simultaneously drive multiple pump chambers, improving its pumping capacity and efficiency, and making it suitable for larger-scale water treatment systems. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the external structure of a multi-speed variable water pump according to Embodiment 1 of this utility model.

[0027] Figure 2 This is a schematic diagram of the internal structure of a multi-speed variable-speed water pump according to Embodiment 1 of this utility model. Figure 1 .

[0028] Figure 3 This is a schematic diagram of the internal structure of a multi-speed variable-speed water pump according to Embodiment 1 of this utility model. Figure 2 .

[0029] Figure 4 This is a side view of Embodiment 2 of the present invention, which describes a multi-speed variable water pump with different speeds.

[0030] Figure 5 yes Figure 4 Cross-sectional view at point AA.

[0031] Figure 6 This is a cross-sectional view of the shifting assembly in Embodiment 2.

[0032] Figure 7 This is a schematic diagram of the shifting assembly in Embodiment 2.

[0033] Figure 8 This is a schematic diagram of the structure of a multi-speed variable water pump according to embodiment 3 of this utility model.

[0034] Figure 9 This is a side view of Embodiment 3 of the present invention, which describes a multi-speed variable water pump with different speeds.

[0035] Figure 10 yes Figure 9 Cross-sectional view at point BB.

[0036] Figure 11 This is a cross-sectional view of the shifting assembly in Embodiment 3.

[0037] Figure 12 This is a schematic diagram of the external structure of Embodiment 4 of the present invention, which is a variable speed water pump with multiple speed ranges.

[0038] Figure 13 This is a schematic diagram of the internal structure of a multi-speed variable water pump according to embodiment 4 of this utility model.

[0039] Figure 14 This is a schematic diagram of a water turbine.

[0040] Figure 15 This is a schematic diagram of the second pumping turbine inside a nested structure.

[0041] Figure 16 This is a schematic diagram of embodiment 5 of the present invention, which describes a variable speed water pump with multiple speed ranges.

[0042] Figure 17 This is a front view of embodiment 5 of the present invention, which describes a multi-speed variable water pump with different speeds.

[0043] Figure 18 yes Figure 17 Cross-sectional view at point C.

[0044] As shown in the figure: 1. Speed-increasing gearbox; 2. Pump body; 3. Housing; 4. Splined main shaft; 5. Shift gear; 6. Shift assembly; 7. Pump main shaft; 8. Driven gear; 9. Gear slot; 10. Sliding groove; 11. First gear; 12. Second gear; 13. First gear driven wheel; 14. Second gear driven wheel; 15. First gear slot; 16. Second gear slot; 17. Third gear; 18. Third gear driven wheel; 19. Third gear slot; 20. Connecting flange; 2 1. Pump chamber; 22. Circulating water channel; 23. Cooling water tank; 24. Pumping turbine; 25. Inlet channel; 26. Outlet channel; 27. Shift lever; 28. Gear position sleeve; 29. ​​Shift handle; 30. Fixed handle; 31. Spring; 32. Gear position fixing sleeve; 33. Active shift gear; 34. Driven shift gear; 35. Active engagement gear; 36. Driven engagement gear; 37. First driven wheel; 38. Second driven wheel; 39. Power input component. Detailed Implementation

[0045] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] In the description of this utility model, "first feature" and "second feature" may include one or more of the indicated features. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the indicated features.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] The following is a detailed description of the multi-speed variable water pump of this utility model, with reference to the accompanying drawings.

[0049] Combined with appendix Figure 1-18 This invention will be described in detail below.

[0050] A multi-speed variable-speed water pump includes a speed-increasing gearbox 1 and a pump body 2 detachably connected thereto. The speed-increasing gearbox 1 includes a housing 3, a splined main shaft 4, shift gears 5, a shift assembly 6, and a water pump main shaft 7. The splined main shaft 4 is mainly located inside the housing 3 and rotatably connected to it, with one end extending outside the housing 3 to connect to a drive device. Several shift gears 5 of different diameters are arranged along the splined main shaft 4 to achieve different transmission ratios. The water pump main shaft 7 is parallel to the splined main shaft 4, with one end extending into the pump body 2 to drive the pump body 2. Several driven gears 8 of different diameters are fixed on the water pump main shaft 7 to mesh with the shift gears 5. The shift assembly 6 extends from the outside of the housing 3 to the inside and connects to the shift gears 5. Shifting is achieved by pulling the shift assembly 6 to engage or disengage the shift gears 5 with the driven gears 8. The diameter of the shift gears 5 is larger than that of the driven gears 8 to achieve a speed-increasing effect.

[0051] The shift gear 5 and driven gear 8 of this utility model can be configured in several ways:

[0052] In one embodiment, a shift gear 5 and a driven gear 8 are each provided, and the two are engaged or disengaged through a shift assembly 6, thereby switching between different gears.

[0053] In another embodiment, the shift assembly 6 includes a shift lever 27, a shift sleeve 28, and a shift handle 29; the shift sleeve 28 is fixed to the outside of the housing 3, the shift lever 27 is disposed inside the shift sleeve 28 and its end is connected to the shift gear 5 located on the outermost side, the shift sleeve 28 is provided with a plurality of shift grooves 9 and a sliding groove 10 between the shift grooves 9 to allow the shift handle 29 to move;

[0054] The gear shift lever 29 includes a fixed handle 30, a spring 31, and a gear position fixing sleeve 32. The fixed handle 30 passes through the gear position groove 9 and connects to the gear shift lever 27. The gear position fixing sleeve 32 is fitted outside the fixed handle 30, and the diameter of the end of the gear position fixing sleeve 32 that contacts the gear position groove 9 is greater than the diameter of the sliding groove 10 and less than or equal to the diameter of the gear position groove 9. The spring 31 is fitted outside the fixed handle 30 and is located inside the gear position fixing sleeve 32. One end of the spring 31 is connected to the end of the fixed handle 30, and the other end is connected to the inner wall of the gear position fixing sleeve 32.

[0055] Based on this, there can be two or more shift gears 5, which are interconnected and operate synchronously. When one shift gear 5 is engaged with the driven gear 8, the other shift gears 5 idle. For example, a first gear 11, a second gear 12, and a third gear 17 can be provided, each corresponding to different transmission ratios and flow / pressure requirements.

[0056] When the shift gear 5 has two positions:

[0057] The shift gear 5 has two gears, namely a first gear 11 and a second gear 12. The diameter of the first gear 11 is smaller than that of the second gear 12. The driven gear 8 has two gears, namely a first driven wheel 13 and a second driven wheel 14. The first driven wheel 13 and the first gear 11 are arranged on the same side and mesh with each other for transmission.

[0058] The gear slot 9 has two slots, namely the first gear slot 15 and the second gear slot 16.

[0059] When the shift gear 5 has three positions:

[0060] The shift gear 5 has three gears: a first gear 11, a second gear 12, and a third gear 17. The diameter of the first gear 11 is smaller than that of the second gear 12, the diameter of the second gear 12 is smaller than that of the third gear 17, and the third gear 17 is located between the first gear 11 and the second gear 12. The driven gear 8 has three gears: a first driven wheel 13, a second driven wheel 14, and a third driven wheel 18. The third driven wheel 18 is located between the first driven wheel 13 and the second driven wheel 14. The first driven wheel 13 is located on the same side as the first gear 11 and meshes with it for transmission.

[0061] The gear slot 9 has three slots, namely a first gear slot 15, a second gear slot 16, and a third gear slot 19, with the third gear slot 19 located between the first gear slot 15 and the second gear slot 16.

[0062] Another way to set the shift gear 5 is to have two shift gears, namely a driving shift gear 33 and a driven shift gear 34. The driving shift gear 33 is slidably connected to the spline main shaft 4 and rotates synchronously. The driven shift gear 34 is sleeved on the outside of the spline main shaft 4 and rotates with it. The shift assembly 6 extends from the outside of the housing 3 to the inside and is connected to the driving shift gear 33. The driving shift gear 33 has a driving engagement tooth 35 on the side near the driven shift gear 34, and the driven shift gear 34 has a driven engagement tooth 36 on the side near the driving shift gear 33.

[0063] The driven gear 8 has two parts, namely a first driven wheel 37 and a second driven wheel 38. The first driven wheel 37 is arranged on the same side as the driving shift gear 33 and meshes with it for transmission. The second driven wheel 38 is arranged on the same side as the driven shift gear 34, and after the driving engagement tooth 35 and the driven engagement tooth 36 engage, the second driven wheel 38 meshes with the driven shift gear 34 for transmission.

[0064] To improve the heat dissipation performance of the water pump, the pump body 2 of this invention includes a connecting flange 20 and a pump chamber 21. The connecting flange 20 is detachably connected to the outer shell 3 of the speed-increasing gearbox 1 and is fitted onto the outside of the water pump main shaft 7. A cooling water tank 23 is provided on the outer wall of the outer shell 3, surrounding the outside of the bearing, to reduce the operating temperature of the bearing. A circulating water channel 22 communicating with the pump chamber 21 is provided inside the side wall of the connecting flange 20, which is connected to the cooling water tank 23 to realize the transfer and dissipation of heat.

[0065] In addition, the power input end of the water pump main shaft 7 is provided with a power input component 39 for connecting to an external drive device; the pump chamber 21 is provided with a pumping turbine 24 connected to the power output end of the water pump main shaft 7. The pumping turbine 24 can be provided as a single unit or two units in a nested connection to improve pumping efficiency. The pump chamber 21 has an inlet channel 25 on the axial outer side of the water pump main shaft 7 and an outlet channel 26 on the circumferential outer side of the pumping turbine 24 for facilitating water flow in and out.

[0066] To further improve the performance and applicability of the water pump, this invention can also provide two water pump spindles 7, symmetrical about the spline spindle 4. Each water pump spindle 7 is connected to a pump chamber 21 via a connecting flange 20, enabling parallel operation of the two pumps. The shift gears on the spline spindle 4 mesh with the driven gears 8 on the two water pump spindles 7 on both sides, achieving synchronous speed change.

[0067] The specific implementation process of this utility model of a multi-speed variable water pump is as follows:

[0068] Example 1: First-level growth rate

[0069] A multi-speed variable-speed water pump includes a speed-increasing gearbox 1 and a pump body 2 detachably connected thereto. The speed-increasing gearbox 1 includes a housing 3, a splined main shaft 4, a shift gear 5, a shift assembly 6, and a water pump main shaft 7. The splined main shaft 4 is mainly located inside the housing 3 and rotatably connected to it, with one end extending outside the housing 3 to connect to a drive device. A shift gear 5 is provided along the splined main shaft 4. The water pump main shaft 7 is arranged parallel to the splined main shaft 4, with one end extending into the pump body 2 to drive the pump body 2. A driven gear 8, meshing with the shift gear 5, is fixed on the water pump main shaft 7. The shift assembly 6 extends from the outside of the housing 3 to the inside and connects to the shift gear 5. Shifting is achieved by pulling the shift assembly 6 to engage or disengage the shift gear 5 with the driven gear 8. The diameter of the shift gear is larger than that of the driven gear 8 to achieve a speed-increasing effect.

[0070] To improve the heat dissipation performance of the water pump, the pump body 2 of this invention includes a connecting flange 20 and a pump chamber 21. The connecting flange 20 is detachably connected to the outer shell 3 of the speed-increasing gearbox 1 and is fitted onto the outside of the water pump main shaft 7. A cooling water tank 23 is provided on the outer wall of the outer shell 3, surrounding the outside of the bearing, to reduce the operating temperature of the bearing. A circulating water channel 22 communicating with the pump chamber 21 is provided inside the side wall of the connecting flange 20, which is connected to the cooling water tank 23 to realize the transfer and dissipation of heat.

[0071] In addition, the power input end of the water pump main shaft 7 is provided with a power input component 39 for connecting to an external drive device; the pump chamber 21 is provided with a pumping turbine 24 connected to the power output end of the water pump main shaft 7. The pumping turbine 24 can be provided as a single unit or two units in a nested connection to improve pumping efficiency. The pump chamber 21 has an inlet channel 25 on the axial outer side of the water pump main shaft 7 and an outlet channel 26 on the circumferential outer side of the pumping turbine 24 for facilitating water flow in and out.

[0072] In this embodiment, the shift assembly 6 uses a shift lever 27, the end of which is connected to the shift gear 5. By pulling the shift lever 27, the shift gear can engage or disengage with the driven gear 8. When the shift gear 5 disengages from the driven gear 8, it is in neutral. At this time, the power input component 39 at the end of the water pump spindle 7 is connected to an external power device as the power source for the entire water pump. In this neutral state, the water pump operates at its normal speed. When the shift gear 5 engages with the driven gear 8, it is in first gear. At this time, the spline spindle 4 is connected to an external power device as the power source for the entire water pump. Since the diameter of the shift gear 5 is larger than that of the driven gear 8, the speed of the water pump spindle 7 is increased by one level under the same external drive speed, thus achieving a one-level speed increase.

[0073] In this example, the shift gear 5 can be fixed at any position along the axial direction of the splined spindle 4, and the driven gear 8 can also be fixed at any position. Figure 2 and attached Figure 3The diagram shows the shift gear 5 and driven gear 8 in their leftmost and rightmost positions, but in actual use they are not limited to these two positions.

[0074] Example 2: Second-gear speed increase (Form 1)

[0075] A multi-speed variable-speed water pump includes a speed-increasing gearbox 1 and a pump body 2 detachably connected thereto. The speed-increasing gearbox 1 includes a housing 3, a splined main shaft 4, shift gears 5, a shift assembly 6, and a water pump main shaft 7. The splined main shaft 4 is mainly located inside the housing 3 and rotatably connected to it, with one end extending outside the housing 3 to connect to a drive device. Several shift gears 5 of different diameters are arranged along the splined main shaft 4 to achieve different transmission ratios. The water pump main shaft 7 is parallel to the splined main shaft 4, with one end extending into the pump body 2 to drive the pump body 2. Several driven gears 8 of different diameters are fixed on the water pump main shaft 7 to mesh with the shift gears 5. The shift assembly 6 extends from the outside of the housing 3 to the inside and connects to the shift gears 5. Shifting is achieved by pulling the shift assembly 6 to engage or disengage the shift gears 5 with the driven gears 8. The diameter of the shift gears 5 is larger than that of the driven gears 8 to achieve a speed-increasing effect.

[0076] The shift assembly 6 includes a shift lever 27, a shift sleeve 28, and a shift handle 29; the shift sleeve 28 is fixed to the outside of the housing 3, the shift lever 27 is disposed inside the shift sleeve 28 and its end is connected to the shift gear 5 located on the outermost side, the shift sleeve 28 is provided with a plurality of shift grooves 9 and a sliding groove 10 between the shift grooves 9 to allow the shift handle 29 to move.

[0077] The gear shift lever 29 includes a fixed handle 30, a spring 31, and a gear position fixing sleeve 32. The fixed handle 30 passes through the gear position groove 9 and connects to the gear shift lever 27. The gear position fixing sleeve 32 is fitted outside the fixed handle 30, and the diameter of the end of the gear position fixing sleeve 32 that contacts the gear position groove 9 is greater than the diameter of the sliding groove 10 and less than or equal to the diameter of the gear position groove 9. The spring 31 is fitted outside the fixed handle 30 and is located inside the gear position fixing sleeve 32. One end of the spring 31 is connected to the end of the fixed handle 30, and the other end is connected to the inner wall of the gear position fixing sleeve 32.

[0078] Based on this, there can be two shift gears 5, which are connected to each other and operate synchronously. When one of the shift gears 5 is engaged with the driven gear 8, the other shift gears 5 idle.

[0079] The shift gear 5 has two gears, namely a first gear 11 and a second gear 12. The diameter of the first gear 11 is smaller than that of the second gear 12. The driven gear 8 has two gears, namely a first gear driven wheel 13 and a second gear driven wheel 14. The first gear driven wheel 13 and the first gear 11 are arranged on the same side and mesh with each other for transmission. The gear slot 9 has two slots, namely a first gear slot 15 and a second gear slot 16.

[0080] To improve the heat dissipation performance of the water pump, the pump body 2 of this invention includes a connecting flange 20 and a pump chamber 21. The connecting flange 20 is detachably connected to the outer shell 3 of the speed-increasing gearbox 1 and is fitted onto the outside of the water pump main shaft 7. A cooling water tank 23 is provided on the outer wall of the outer shell 3, surrounding the bearing to reduce its operating temperature. A circulating water channel 22, connecting to the pump chamber 21, is provided inside the side wall of the connecting flange 20 and connected to the cooling water tank 23, enabling heat transfer and dissipation. During pumping, the water pumped by the pump body 2 can enter the cooling water tank 23 through the circulating water channel 22 and then return to the pump body 2, cooling the connecting flange 20, the bearing of the speed-increasing gearbox 1, and their surrounding structures, thus extending their service life.

[0081] In addition, the power input end of the water pump main shaft 7 is provided with a power input component 39 for connecting to an external drive device; the pump chamber 21 is provided with a pumping turbine 24 connected to the power output end of the water pump main shaft 7. The pumping turbine 24 can be provided as a single unit or two units in a nested connection to improve pumping efficiency. The pump chamber 21 has an inlet channel 25 on the axial outer side of the water pump main shaft 7 and an outlet channel 26 on the circumferential outer side of the pumping turbine 24 for facilitating water flow in and out.

[0082] When shifting to first gear, the gear fixing sleeve 32 is pulled to compress the spring 31 and pull it out of the original gear slot 9. At the same time as pulling the gear fixing sleeve 32, the fixed handle 30 is pushed to move the shift lever 27 until the gear fixing sleeve 32 is aligned with the first gear slot 15. During the pulling process, the fixed handle 30 moves along the sliding groove 10. When the gear fixing sleeve 32 is released, under the action of the spring 31, the gear fixing sleeve 32 automatically springs back into the first gear slot 15. At this time, the first gear 11 meshes with the first gear driven wheel 13, thereby driving the water pump main shaft 7 to drive the pump body 2 to run and pump water. At this time, the second gear 12 rotates freely.

[0083] When switching to second gear, the operation is similar to switching to first gear. Simply insert the gear fixing sleeve 32 into the second gear slot 16. At this time, the second gear 12 meshes with the second gear driven wheel 14, thereby driving the water pump main shaft 7 to drive the pump body 2 to pump water. At this time, the first gear 11 rotates freely.

[0084] When speed increase is not required, the water pump is driven by the power input component 39 at the end of the water pump main shaft 7 connected by an external drive device. At this time, in order to avoid wear of the speed increase gearbox 1, the shift component 6 can be pulled to put the speed increase gearbox 1 in neutral, that is, the shift gear 5 is not engaged with any driven gear 8.

[0085] Example 3: Three-level speed increase

[0086] The difference from Embodiment 2 is that the shift gear 5 has three gears: a first gear 11, a second gear 12, and a third gear 17. The diameter of the first gear 11 is smaller than that of the second gear 12, the diameter of the second gear 12 is smaller than that of the third gear 17, and the third gear 17 is located between the first gear 11 and the second gear 12. The driven gear 8 has three gears: a first-gear driven wheel 13, a second-gear driven wheel 14, and a third-gear driven wheel 18. The third-gear driven wheel 18 is located between the first-gear driven wheel 13 and the second-gear driven wheel 14. The first-gear driven wheel 13 is located on the same side as the first gear 11 and meshes with it. The gear slot 9 has three slots: a first-gear slot 15, a second-gear slot 16, and a third-gear slot 19. The third-gear slot 19 is located between the first-gear slot 15 and the second-gear slot 16.

[0087] Since the third gear 17 has the largest diameter, it must be in the middle. The positions of the first gear 11 and the second gear 12 on its left and right sides can be interchanged as needed, and the positions of the first driven wheel 13 and the second driven wheel 14 can be switched accordingly.

[0088] Based on Examples 1-3, it is evident that improvements to the structure, such as four-speed, five-speed, or even higher-speed pumps, can be made. Therefore, inspired by this structure, higher-speed pumps based on this structure should also be within the scope of protection of this application.

[0089] Example 4: Second-gear speed increase (Form 2)

[0090] A multi-speed variable-speed water pump includes a speed-increasing gearbox 1 and a pump body 2 detachably connected thereto. The speed-increasing gearbox 1 includes a housing 3 and a drive device externally connected to the splined housing 3. Several shift gears 5 of different diameters are arranged along the splined main shaft 4 to achieve different transmission ratios. The pump main shaft 7 is arranged parallel to the splined main shaft 4, with one end extending into the pump body 2 to drive the pump body 2. Several driven gears 8 of different diameters are fixed on the pump main shaft 7 to mesh with the shift gears 5. A shift assembly 6 extends from the outside of the housing 3 to the inside and connects to the shift gears 5. Shifting gears are achieved by pulling the shift assembly 6 to engage or disengage the shift gears 5 with the driven gears 8. The diameter of the shift gears 5 is larger than that of the driven gears 8 to achieve the speed-increasing effect.

[0091] The shift assembly 6 includes a shift lever 27, a shift sleeve 28, and a shift handle 29; the shift sleeve 28 is fixed to the outside of the housing 3, the shift lever 27 is disposed inside the shift sleeve 28 and its end is connected to the shift gear 5 located on the outermost side, the shift sleeve 28 is provided with a plurality of shift grooves 9 and a sliding groove 10 between the shift grooves 9 to allow the shift handle 29 to move.

[0092] The gear shift lever 29 includes a fixed handle 30, a spring 31, and a gear position fixing sleeve 32. The fixed handle 30 passes through the gear position groove 9 and connects to the gear shift lever 27. The gear position fixing sleeve 32 is fitted outside the fixed handle 30, and the diameter of the end of the gear position fixing sleeve 32 that contacts the gear position groove 9 is greater than the diameter of the sliding groove 10 and less than or equal to the diameter of the gear position groove 9. The spring 31 is fitted outside the fixed handle 30 and is located inside the gear position fixing sleeve 32. One end of the spring 31 is connected to the end of the fixed handle 30, and the other end is connected to the inner wall of the gear position fixing sleeve 32.

[0093] Based on this, there are two shift gears 5. When one of the shift gears 5 is engaged with the driven gear 8, the other shift gears 5 rotate freely.

[0094] There are two shift gears 5, namely a driving shift gear 33 and a driven shift gear 34. The driving shift gear 33 is slidably connected to the spline main shaft 4 and rotates synchronously. The driven shift gear 34 is sleeved on the outside of the spline main shaft 4 and rotates with it. The shift assembly 6 extends from the outside of the housing 3 to the inside and is connected to the driving shift gear 33. The driving shift gear 33 has a driving engagement tooth 35 on the side near the driven shift gear 34, and the driven shift gear 34 has a driven engagement tooth 36 on the side near the driving shift gear 33.

[0095] The driven gear 8 has two parts, namely a first driven wheel 37 and a second driven wheel 38. The first driven wheel 37 is arranged on the same side as the driving shift gear 33 and meshes with it for transmission. The second driven wheel 38 is arranged on the same side as the driven shift gear 34, and after the driving engagement tooth 35 and the driven engagement tooth 36 engage, the second driven wheel 38 meshes with the driven shift gear 34 for transmission.

[0096] To improve the heat dissipation performance of the water pump, the pump body 2 of this invention includes a connecting flange 20 and a pump chamber 21. The connecting flange 20 is detachably connected to the outer shell 3 of the speed-increasing gearbox 1 and is fitted onto the outside of the water pump main shaft 7. A cooling water tank 23 is provided on the outer wall of the outer shell 3, surrounding the outside of the bearing, to reduce the operating temperature of the bearing. A circulating water channel 22 communicating with the pump chamber 21 is provided inside the side wall of the connecting flange 20, which is connected to the cooling water tank 23 to realize the transfer and dissipation of heat.

[0097] In addition, the power input end of the water pump main shaft 7 is provided with a power input component 39 for connecting to an external drive device; the pump chamber 21 is provided with a pumping turbine 24 connected to the power output end of the water pump main shaft 7. The pumping turbine 24 can be provided as a single unit or two units in a nested connection to improve pumping efficiency. The pump chamber 21 has an inlet channel 25 on the axial outer side of the water pump main shaft 7 and an outlet channel 26 on the circumferential outer side of the pumping turbine 24 for facilitating water flow in and out.

[0098] In this embodiment, when the active shift gear 33 meshes with the first driven wheel 37, it is in gear one. At this time, the driven shift gear 34 is rotatably connected to the splined main shaft 4. The locking teeth inside the active shift gear 33 cooperate with the grooves on the splined main shaft. When the splined main shaft 4 rotates, the active shift gear 33 rotates accordingly and further drives the first driven wheel 37 to rotate, thereby driving the water pump main shaft 7 to rotate. At this time, the driven shift gear 34 rotates relative to the splined main shaft 4 and cannot effectively drive the second driven wheel 38 to rotate. Referring to the working principle of the shift assembly 6 in Embodiment 2, the second gear switching in this example is realized. The difference is that after switching to the second gear in this embodiment, the active engagement tooth 35 on one side of the active shift gear 33 engages with the driven engagement tooth 36 on the side of the driven shift gear 34. At this time, when the spline main shaft 4 rotates, it can drive the driven shift gear 34 to rotate effectively through the active shift gear 33. Then, the driven shift gear 34 drives the second driving wheel to rotate, thereby driving the water pump main shaft 7. In the second gear state, the active shift gear 33 disengages from the first driven wheel 37. Therefore, the active shift gear 33 will not drive the water pump main shaft 7 to rotate through the first driven wheel 37.

[0099] When speed increase is not required, the water pump is driven by the power input component 39 at the end of the water pump main shaft 7 connected by an external drive device. At this time, in order to avoid wear of the speed increase gearbox 1, the shift component 6 can be pulled to put the speed increase gearbox 1 in neutral, that is, the active shift gear 33 does not mesh with the first driven gear 37, and the active engagement tooth 35 does not mesh with the driven engagement tooth 36.

[0100] Based on Embodiment 4, improvements can be made to this configuration, such as three-speed, four-speed, or even higher-speed pumps. Therefore, inspired by this structure, higher-speed water pumps based on this structure should also be within the scope of protection of this application.

[0101] Example 5: Incremental Pumping

[0102] Based on embodiment 1, 2, 3 or 4, the water pump spindle 7 is arranged symmetrically with respect to the spline spindle 4 in two rows, and each water pump spindle 7 is connected to a pump chamber 21 through a connecting flange 20; the shift gear 5 on the spline spindle 4 meshes with the driven gear 8 on the two water pump spindles 7 on both sides respectively.

[0103] By using a splined spindle 4 and its shift gear 5 to drive two water pump spindles 7, which in turn drive their respective pump bodies 2, the "one-to-two" principle is achieved, meaning that one gearbox drives two pump bodies 2, thereby increasing the pumping capacity.

[0104] To meet specific applications, the structure of the embodiment can be expanded to include more pump spindles 7, driven gears 8 and pump bodies 2 as needed to achieve "one-to-three, one-to-four, etc." The expansion method should be set according to the actual operating capacity of the gearbox to avoid overload operation.

[0105] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A variable speed water pump with multiple speed settings, characterized in that: The system includes a speed-increasing gearbox (1) and a pump body (2) detachably connected thereto; the speed-increasing gearbox (1) includes a housing (3), a splined spindle (4), shift gears (5), a shift assembly (6), and a water pump spindle (7). The splined spindle (4) is located inside the housing (3) and is rotatably connected to the housing (3). One end of the splined spindle (4) extends to the outside of the housing (3) to connect to a drive device. Several shift gears (5) with different diameters are provided along the splined spindle (4). The water pump spindle (7) The pump spindle (7) is set parallel to the spline spindle (4) and one end of the pump spindle (7) extends into the pump body (2) to drive the pump body (2) to run. Several driven gears (8) with different diameters are fixed on the pump spindle (7) to mesh with the shift gear (5). The shift assembly (6) extends from the outside of the outer shell (3) to the inside and connects to the shift gear (5). By pulling the shift assembly (6), the shift gear (5) is driven to mesh or disengage with the driven gear (8) to achieve shifting. The diameter of the shift gear (5) is larger than that of the driven gear (8).

2. The variable speed water pump with multiple speed settings according to claim 1, characterized in that: The shift gear (5) is provided, and the driven gear (8) is also provided. The shift gear (5) and the driven gear (8) are engaged or disengaged.

3. The variable speed water pump with multiple speed settings according to claim 1, characterized in that: The shift assembly (6) includes a shift lever (27), a gear sleeve (28), and a shift handle (29); the gear sleeve (28) is fixed outside the housing (3), the shift lever (27) is disposed inside the gear sleeve (28) and its end is connected to the outermost shift gear (5), the gear sleeve (28) is provided with a plurality of gear slots (9) and a sliding groove (10) between the gear slots (9) to allow the shift handle (29) to move; The gear shift lever (29) includes a fixed handle (30), a spring (31), and a gear position fixing sleeve (32). The fixed handle (30) passes through the gear position groove (9) and is connected to the gear shift lever (27). The gear position fixing sleeve (32) is fitted outside the fixed handle (30), and the diameter of the end of the gear position fixing sleeve (32) that contacts the gear position groove (9) is greater than the diameter of the sliding groove (10) and less than or equal to the diameter of the gear position groove (9). The spring (31) is fitted outside the fixed handle (30) and inside the gear position fixing sleeve (32). One end of the spring (31) is connected to the end of the fixed handle (30), and the other end is connected to the inner wall of the gear position fixing sleeve (32).

4. The variable speed water pump with multiple speed settings according to claim 3, characterized in that: At least two shift gears (5) are provided. The shift gears (5) are slidably connected to the spline spindle (4). The shift gears (5) are connected to each other and operate synchronously. When one of the shift gears (5) is engaged with the driven gear (8), the other shift gears (5) are idle.

5. A multi-speed variable-speed water pump according to claim 4, characterized in that: The shift gear (5) has two gears, namely a first gear (11) and a second gear (12). The diameter of the first gear (11) is smaller than that of the second gear (12). The driven gear (8) has two gears, namely a first driven wheel (13) and a second driven wheel (14). The first driven wheel (13) and the first gear (11) are arranged on the same side and mesh with each other for transmission. The gear slot (9) has two slots, namely a first gear slot (15) and a second gear slot (16).

6. The variable speed water pump with multiple speed settings according to claim 4, characterized in that: The shift gear (5) has three gears: a first gear (11), a second gear (12), and a third gear (17). The diameter of the first gear (11) is smaller than that of the second gear (12), and the diameter of the second gear (12) is smaller than that of the third gear (17). The third gear (17) is located between the first gear (11) and the second gear (12). The driven gear (8) has three gears: a first driven wheel (13), a second driven wheel (14), and a third driven wheel (18). The third driven wheel (18) is located between the first driven wheel (13) and the second driven wheel (14). The first driven wheel (13) is located on the same side as the first gear (11) and meshes with it for transmission. The gear slot (9) has three slots, namely a first gear slot (15), a second gear slot (16) and a third gear slot (19), with the third gear slot (19) located between the first gear slot (15) and the second gear slot (16).

7. A multi-speed variable-speed water pump according to claim 3, characterized in that: The shift gear (5) has two gears, namely a driving shift gear (33) and a driven shift gear (34). The driving shift gear (33) is slidably connected to the spline main shaft (4) and rotates synchronously. The driven shift gear (34) is sleeved on the outside of the spline main shaft (4) and rotates with it. The shift assembly (6) extends from the outside of the outer shell (3) to the inside and is connected to the driving shift gear (33). The driving shift gear (33) has a driving engagement tooth (35) on the side near the driven shift gear (34), and the driven shift gear (34) has a driven engagement tooth (36) on the side near the driving shift gear (33). The driven gear (8) has two parts, namely a first driven wheel (37) and a second driven wheel (38). The first driven wheel (37) is arranged on the same side as the driving shift gear (33) and meshes with it for transmission. The second driven wheel (38) is arranged on the same side as the driven shift gear (34), and after the driving engagement tooth (35) and the driven engagement tooth (36) mesh, the second driven wheel (38) meshes with the driven shift gear (34) for transmission.

8. A multi-speed variable-speed water pump according to any one of claims 1-7, characterized in that: The pump body (2) includes a connecting flange (20) and a pump chamber (21). The connecting flange (20) is detachably connected to the outer shell (3) of the speed-increasing gearbox (1) and is fitted outside the pump main shaft (7). The pump main shaft (7) is rotatably connected to the outer shell (3) through a bearing. The inner side wall of the connecting flange (20) is provided with a circulating water channel (22) that communicates with the pump chamber (21). The outer wall of the outer shell (3) is provided with a cooling water tank (23) that is connected to the circulating water channel (22). The cooling water tank (23) surrounds the outer side of the bearing.

9. A multi-speed variable-speed water pump according to claim 8, characterized in that: The power input end of the water pump main shaft (7) is provided with a power input component (39) for connecting to an external drive device; the pump chamber (21) is provided with a pumping turbine (24) connected to the power output end of the water pump main shaft (7); the pump chamber (21) is located on the axial outer side of the water pump main shaft (7) and is provided with a water inlet channel (25); the pump chamber (21) is located on the circumferential outer side of the pumping turbine (24) and is provided with a water outlet channel (26); the pumping turbine (24) is provided with one or two in a nested connection.

10. A multi-speed variable-speed water pump according to claim 9, characterized in that: The water pump spindle (7) is arranged in two rows symmetrically about the spline spindle (4). Each water pump spindle (7) is connected to a pump chamber (21) through a connecting flange (20). The shift gear (5) on the spline spindle (4) meshes with the driven gears (8) on the two water pump spindles (7) respectively.

Images