Speed-increasing multi-gear variable-speed water pump

Abstract

The invention discloses a speed-increasing multi-gear variable-speed water pump and relates to the technical field of water pumps, a spline main shaft body is located in a shell and rotationally connected with the shell, one end of a spline main shaft extends out of the shell to be connected with a driving device, and a plurality of gear shifting gears with different diameters are arranged along the spline main shaft; 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 step-up gear box comprising the shifting gears with different diameters and the driven gear matched with the step-up 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] The present invention relates to the technical field of water pumps, and in particular to a multi-speed variable speed water pump. Background Art

[0002] In existing water pump technology, most water pumps are designed with fixed speed and fixed flow, which cannot meet the needs of flow and pressure changes under different working conditions. Although there are some water pumps with adjustable speed on the market, their adjustment range is limited and their efficiency is low, making it difficult to adapt to a variety of application scenarios. In particular, in water treatment systems that require frequent adjustment of flow and pressure, the limitations of traditional water pumps are particularly obvious.

[0003] At present, there are some variable speed water pump products on the market, but most of them use motor frequency conversion to achieve speed change. Although this method can achieve relatively precise speed control, it is costly and has high requirements on motor performance. In addition, some water pumps that use pulley transmission and adjust the speed ratio to achieve speed increase, although the cost is relatively low, have limited speed gears, and the gear shifting operation is complicated and not flexible enough.

[0004] Therefore, a multi-speed variable speed water pump with an increasing speed becomes a problem that needs to be solved urgently. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a speed-increasing multi-speed variable speed water pump, which realizes the multi-speed variable speed function through a speed-increasing gearbox, and at the same time designs a self-cooling structure at the connection between the speed-increasing gearbox and the pump body to meet the flow requirements under different working conditions and extend the service life of the water pump.

[0006] In order to solve the above technical problems, the present invention provides a technical solution: a speed-increasing multi-speed variable speed water pump, comprising a speed-increasing gearbox (1) and a pump body (2) detachably connected thereto; the speed-increasing gearbox (1) comprises a housing (3), a spline main shaft (4), a shift gear (5), a shift assembly (6) and a water pump main shaft (7); the main body of the spline main shaft (4) is located inside the housing (3) and is rotatably connected to the housing (3); one end of the spline main shaft (4) extends to the outside of the housing (3) to connect to a driving device; the shift gear (5) is provided along the spline main shaft (4) with a gearbox (5) and a gearbox (6) arranged thereon; The water pump main shaft (7) is arranged in parallel with the spline main shaft (4) and one end of the water pump main shaft (7) extends into the pump body (2) to drive the pump body (2) to operate. The water pump main shaft (7) is fixed with a plurality of driven gears (8) of different diameters that mesh with the shift gear (5). The shift assembly (6) extends from the outside of the housing (3) to the inside and then connects to the shift gear (5). The shift assembly (6) is pulled to drive the shift gear (5) to mesh with or separate from the driven gear (8) to achieve gear shifting. The diameter of the shift gear (5) is larger than that of the driven gear (8).

[0007] Furthermore, the shift gear (5) is provided with one, and the driven gear (8) is also provided with one, and the shift gear (5) is meshed with or disengaged from the driven gear (8).

[0008] Furthermore, the shift assembly (6) comprises a shift rod (27), a gear sleeve (28) and a shift handle (29); the gear sleeve (28) is fixed to the outside of the housing (3); the shift rod (27) is arranged 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 sliding slots (10) are provided between the gear slots (9) to allow the shift handle (29) to move;

[0009] The shift handle (29) comprises a fixed handle (30), a spring (31) and a gear fixing sleeve (32); the fixed handle (30) passes through the gear slot (9) and is connected to the shift rod (27); the gear fixing sleeve (32) is sleeved on the outside of the fixed handle (30); the diameter of one end of the gear fixing sleeve (32) in contact with the gear slot (9) is greater than the diameter of the sliding slot (10) and less than or equal to the diameter of the gear slot (9); the spring (31) is sleeved on the outside of the fixed handle (30) and is located inside the gear 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 fixing sleeve (32).

[0010] Furthermore, at least two shift gears (5) are provided, the shift gears (5) are slidably connected to the spline main shaft (4), the shift gears (5) are connected to each other and operate synchronously, and when one of the shift gears (5) is engaged with the driven gear (8), the other shift gears (5) are idle.

[0011] Furthermore, the shift gear (5) is provided with two, namely, a first gear (11) and a second gear (12); the first gear (11) has a smaller diameter than the second gear (12); the driven gear (8) is provided with two, namely, a first gear driven wheel (13) and a second gear driven wheel (14); the first gear driven wheel (13) and the first gear gear (11) are arranged on the same side and mesh with each other for transmission;

[0012] The gear slot (9) is provided with two, namely a first gear slot (15) and a second gear slot (16).

[0013] Further, the shift gear (5) is provided with three gears, namely, 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); the third gear (17) is arranged between the first gear (11) and the second gear (12); the driven gear (8) is provided with three gears, namely, 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 arranged between the first gear driven wheel (13) and the second gear driven wheel (14); the first gear driven wheel (13) and the first gear gear (11) are arranged on the same side and mesh with each other for transmission;

[0014] The gear slots (9) are provided with three gear slots, namely a first gear slot (15), a second gear slot (16) and a third gear slot (19); the third gear slot (19) is arranged between the first gear slot (15) and the second gear slot (16).

[0015] Furthermore, the shift gear (5) is provided with two, namely, an active shift gear (33) and a driven shift gear (34); the active 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 is rotationally connected thereto; the shift assembly (6) extends from the outside to the inside of the housing (3) and is connected to the active shift gear (5); a side of the active shift gear (33) close to the driven shift gear (34) is provided with an active meshing tooth (35); a side of the driven shift gear (34) close to the active shift gear (33) is provided with a driven meshing tooth (36);

[0016] The driven gear (8) is provided with two, 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 active shifting gear (33) and meshes with each other for transmission; the second driven wheel (38) is arranged on the same side as the driven shifting gear (34); after the active meshing teeth (35) mesh with the driven meshing teeth (36), the second driven wheel (38) meshes with the driven shifting gear (34) for transmission.

[0017] Furthermore, the pump body (2) comprises a connecting flange (20) and a pump chamber (21); the connecting flange (20) is detachably connected to the housing (3) of the speed increasing gear box (1) and is sleeved on the outside of the water pump main shaft (7); the water pump main shaft (7) is rotatably connected to the housing (3) via a bearing; a circulating water channel (22) communicating with the pump chamber (21) is provided inside the side wall of the connecting flange (20); a cooling water tank (23) connected to the circulating water channel (22) is provided on the outer wall of the housing (3); and the cooling water tank (23) surrounds the outside of the bearing.

[0018] Furthermore, a power input part (39) connected to an external drive device is provided at the power input end of the water pump main shaft (7); a water pumping turbine (24) connected to the power output end of the water pump main shaft (7) is provided inside the pump chamber (21); a water inlet channel (25) is provided on the axial outer side of the water pump main shaft (7) of the pump chamber (21); and a water outlet channel (26) is provided on the circumferential outer side of the water pumping turbine (24) of the pump chamber (21); and the water pumping turbine (24) is provided with one or two in an inner and outer nested connection.

[0019] Furthermore, the water pump main shaft (7) is symmetrically provided with two rows about the spline main shaft (4), and each water pump main shaft (7) is connected to a pump chamber (21) via a connecting flange (20); the shift gear (5) on the spline main shaft (4) is meshed with the driven gears (8) on the two water pump main shafts (7) on both sides for transmission.

[0020] The advantages of the present invention compared with the prior art are:

[0021] The present invention realizes the multi-speed shifting function of the water pump by including a speed increasing gearbox with shifting gears of different diameters and a driven gear matched therewith. The user can select different gears by pulling the shift lever according to actual needs, thereby adjusting the speed and flow of the water pump to meet the needs under various working conditions.

[0022] Since the diameter of the shift gear is larger than that of the driven gear, when the two are meshed, a speed-increasing effect can be achieved, thus improving the working efficiency of the water pump. This design not only enables the water pump to provide sufficient torque at low speed, but also achieves a higher speed and flow at high speed.

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

[0024] The pump body and the speed-increasing gear box of the present invention are connected in a detachable manner, so that the user can conveniently disassemble and replace the pump body or the speed-increasing gear box when necessary, thereby reducing maintenance costs and time.

[0025] The water pump main shaft of the present invention can be designed as two rows, each row of water pump main shaft is connected to a pump chamber, and is driven by the shift gear on the spline main shaft meshing with the driven gear. This design enables the water pump to drive multiple pump chambers to work at the same time, improves the water pumping capacity and working efficiency of the water pump, and is suitable for larger-scale water treatment systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the external structure of Example 1 of a speed-increasing multi-speed variable speed water pump of the present invention.

[0027] Figure 2 The internal structure of a multi-speed variable speed water pump embodiment 1 of the present invention is shown in FIG. Figure 1 .

[0028] Figure 3 The internal structure of a multi-speed variable speed water pump embodiment 1 of the present invention is shown in FIG. Figure 2 .

[0029] Figure 4 It is a side view of Example 2 of a speed-increasing multi-speed variable water pump of the present invention.

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

[0031] Figure 6 It is a cross-sectional view of the shift assembly in Example 2.

[0032] Figure 7 It is a schematic diagram of the structure of the shift assembly in Example 2.

[0033] Figure 8 It is a structural schematic diagram of Example 3 of a speed-increasing multi-speed variable speed water pump of the present invention.

[0034] Fig. 9 It is a side view of Example 3 of a speed-increasing multi-speed variable water pump of the present invention.

[0035] Fig.10 yes Fig. 9 Cross-section at BB.

[0036] Fig.11 It is a cross-sectional view of the shift assembly in Example 3.

[0037] Fig.12 It is a schematic diagram of the external structure of Example 4 of a speed-increasing multi-speed variable speed water pump of the present invention.

[0038] Fig.13 It is a schematic diagram of the internal structure of a speed-increasing multi-speed variable speed water pump embodiment 4 of the present invention.

[0039] Fig.14 It is a schematic diagram of the structure of a pumping turbine.

[0040] Fig.15 It is a schematic diagram of the structure of the second pumping turbine inside when the pumping turbine adopts two nested structures.

[0041] Fig.16 It is a structural schematic diagram of Example 5 of a speed-increasing multi-speed variable water pump according to the present invention.

[0042] Fig.17It is a front view of Example 5 of a speed-increasing multi-speed variable water pump of the present invention.

[0043] Fig.18 yes Fig.17 Cross-section view at CC.

[0044] As shown in the figure: 1. Speed ​​increasing gearbox, 2. Pump body, 3. Casing, 4. Spline main shaft, 5. Shift gear, 6. Shift assembly, 7. Pump main shaft, 8. Driven gear, 9. Shift slot, 10. Sliding slot, 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. Water inlet channel, 26. Water outlet channel, 27. Shift lever, 28. Shift sleeve, 29. Shift handle, 30. Fixed handle, 31. Spring, 32. Shift fixing sleeve, 33. Active shift gear, 34. Driven shift gear, 35. Active meshing teeth, 36. Driven meshing teeth, 37. First driven wheel, 38. Second driven wheel, 39. Power input member. DETAILED DESCRIPTION

[0045] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “inside”, “outside”, “vertical” and “circumferential” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The following is a further detailed description of a multi-speed variable speed water pump according to the present invention in conjunction with the accompanying drawings.

[0049] Combined with Figure 1-18 , the present invention is introduced in detail.

[0050] A speed-increasing multi-speed variable-speed water pump comprises a speed-increasing gearbox and a pump body detachably connected thereto. The speed-increasing gearbox comprises a housing, a spline main shaft, a shift gear, a shift assembly and a water pump main shaft. The main body of the spline main shaft is located inside the housing and is rotatably connected to the housing, and one end of the spline main shaft extends to the outside of the housing to connect to a driving device. Several shift gears with different diameters are arranged along the spline main shaft to achieve different transmission ratios. The water pump main shaft is arranged parallel to the spline main shaft and one end of the spline main shaft extends into the pump body to drive the pump body to operate. Several driven gears with different diameters that mesh with the shift gear are fixed on the water pump main shaft. The shift assembly extends from the outside of the housing to the inside and is connected to the shift gear. The shift gear is driven to mesh or separate with the driven gear by pulling the shift assembly to achieve gear shifting. The diameter of the shift gear is larger than the driven gear to achieve a speed-increasing effect.

[0051] There are many ways to set the shift gear and the driven gear of the present invention:

[0052] In one solution, the shift gear and the driven gear are each provided with one, and the two are engaged or disengaged through the shift assembly to switch between different gears.

[0053] In another embodiment, 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 arranged 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 sliding slots are provided between the shift slots to allow the shift handle to move;

[0054] The shift handle includes a fixed handle, a spring and a gear fixing sleeve. The fixed handle passes through the gear slot and is connected to the shift rod. The gear fixing sleeve is sleeved on the outside of the fixed handle and the diameter of the end of the gear fixing sleeve that contacts the gear slot is larger than the diameter of the sliding slot and less than or equal to the diameter of the gear slot. The spring is sleeved on the outside of the fixed handle and is inside the gear 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 fixing sleeve.

[0055] On this basis, two or more shift gears can be provided, which are interconnected and operate synchronously. When one of the shift gears is engaged with the driven gear, the other shift gears are idle. For example, a first gear, a second gear, and a third gear can be provided, corresponding to different transmission ratios and flow pressure requirements.

[0056] There are two shift gears:

[0057] There are two shift gears, namely the first gear and the second gear. The diameter of the first gear is smaller than that of the second gear. There are two driven gears, namely the first gear driven wheel and the second gear driven wheel. The first gear driven wheel is arranged on the same side as the first gear and meshes with the transmission.

[0058] There are two gear slots, namely a first gear slot and a second gear slot.

[0059] There are three shift gears:

[0060] There are three shift gears, namely, the first gear, the second gear and the 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 arranged between the first gear and the second gear; there are three driven gears, namely, the first gear driven wheel, the second gear driven wheel and the third gear driven wheel, and the third gear driven wheel is arranged between the first gear driven wheel and the second gear driven wheel, and the first gear driven wheel is arranged on the same side as the first gear and meshes with the transmission;

[0061] There are three gear slots, namely a first-gear card slot, a second-gear card slot and a third-gear card slot. The third-gear card slot is arranged between the first-gear card slot and the second-gear card slot.

[0062] Another arrangement of the shift gear is that there are two shift gears, namely, a driving shift gear and a driven shift gear, the driving shift gear is slidably connected to the spline main shaft and rotates synchronously, the driven shift gear is sleeved on the outside of the spline main shaft and is rotationally connected thereto, the shift assembly extends from the outside of the housing to the inside and then connects to the driving shift gear, the driving shift gear is provided with a driving meshing tooth on one side close to the driven shift gear, and the driven shift gear is provided with a driven meshing tooth on one side close to the driving shift gear;

[0063] There are two driven gears, namely the first driven wheel and the second driven wheel. The first driven wheel is arranged on the same side as the active 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 active meshing teeth mesh with the driven meshing teeth, the second driven wheel meshes with the driven shift gear for transmission.

[0064] In order to improve the heat dissipation performance of the water pump, the pump body of the present invention includes a connecting flange and a pump chamber. The connecting flange is detachably connected to the outer shell of the speed increasing gear box and is sleeved on the outside of the main shaft of the water pump. A cooling water tank is provided on the outer wall of the outer shell, which surrounds the outer side of the bearing and is used to reduce the working temperature of the bearing. A circulating water channel connected to the pump chamber is provided inside the side wall of the connecting flange and is connected to the cooling water tank to achieve heat transfer and dissipation.

[0065] In addition, a power input part connected to an external drive device is provided at the power input end of the water pump main shaft; a water pumping turbine connected to the power output end of the water pump main shaft is provided inside the pump chamber. The water pumping turbine can be provided with one or two connected in an inner and outer nesting manner to improve the pumping efficiency. The pump chamber is provided with a water inlet channel on the axial outer side of the water pump main shaft, and a water outlet channel is provided on the circumferential outer side of the water pumping turbine to achieve the inflow and outflow of water.

[0066] In order to further improve the performance and application scope of the water pump, the present invention can also be provided with two water pump main shafts, which are symmetrical about the spline main shaft. Each water pump main shaft is connected to a pump chamber through a connecting flange to realize the parallel operation of two pumps. The shift gears on the spline main shaft are meshed and driven with the driven gears on the two water pump main shafts on both sides to realize synchronous speed change.

[0067] The specific implementation process of the multi-speed variable speed water pump of the present invention is as follows:

[0068] Example 1: First gear speed increase

[0069] A speed-increasing multi-speed variable-speed water pump comprises a speed-increasing gearbox and a pump body detachably connected thereto. The speed-increasing gearbox comprises a housing, a spline main shaft, a shift gear, a shift assembly and a water pump main shaft. The main body of the spline main shaft is located inside the housing and is rotatably connected to the housing, and one end of the spline main shaft extends to the outside of the housing to connect to a driving device. A shift gear is arranged along the spline main shaft. The water pump main shaft is arranged parallel to the spline main shaft and one end of the spline main shaft extends into the pump body to drive the pump body to operate. A driven gear meshing with the shift gear is fixed on the water pump main shaft. The shift assembly extends from the outside of the housing to the inside and then connects to the shift gear. The shift gear is driven to engage or separate with the driven gear by pulling the shift assembly to achieve gear shifting. The diameter of the shift gear is larger than the driven gear to achieve a speed-increasing effect.

[0070] In order to improve the heat dissipation performance of the water pump, the pump body of the present invention includes a connecting flange and a pump chamber. The connecting flange is detachably connected to the outer shell of the speed increasing gear box and is sleeved on the outside of the main shaft of the water pump. A cooling water tank is provided on the outer wall of the outer shell, which surrounds the outer side of the bearing and is used to reduce the working temperature of the bearing. A circulating water channel connected to the pump chamber is provided inside the side wall of the connecting flange and is connected to the cooling water tank to achieve heat transfer and dissipation.

[0071] In addition, a power input part connected to an external drive device is provided at the power input end of the water pump main shaft; a water pumping turbine connected to the power output end of the water pump main shaft is provided inside the pump chamber. The water pumping turbine can be provided with one or two connected in an inner and outer nesting manner to improve the pumping efficiency. The pump chamber is provided with a water inlet channel on the axial outer side of the water pump main shaft, and a water outlet channel is provided on the circumferential outer side of the water pumping turbine to achieve the inflow and outflow of water.

[0072] In this embodiment, the shift assembly adopts a shift lever, and the end of the shift lever is connected to the shift gear. The shift gear is driven to engage or disengage with the driven gear by pulling the shift lever; when the shift gear is separated from the driven gear, it is neutral gear. At this time, the power input piece at the end of the water pump main shaft is connected to the external power device as the power source of the entire water pump. In this neutral gear state, the water pump is at a normal speed; when the shift gear is engaged with the driven gear, it is first gear. At this time, the spline main shaft is connected to the external power device as the power source of the entire water pump. At this time, since the diameter of the shift gear is larger than the diameter of the driven gear, at the same external drive speed, the speed of the water pump main shaft is increased by one level, thereby achieving a one-speed increase.

[0073] In this example, the shift gear 5 can be fixed at any axial position of the spline main shaft 4, and the same is true for the driven gear 8. Figure 2 and attached Figure 3 The shift gear 5 and the driven gear 8 are shown in the states of being at the far left end and the far right end, but they are not limited to these two states in actual use.

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

[0075] A speed-increasing multi-speed variable-speed water pump comprises a speed-increasing gearbox and a pump body detachably connected thereto. The speed-increasing gearbox comprises a housing, a spline main shaft, a shift gear, a shift assembly and a water pump main shaft. The main body of the spline main shaft is located inside the housing and is rotatably connected to the housing, and one end of the spline main shaft extends to the outside of the housing to connect to a driving device. Several shift gears with different diameters are arranged along the spline main shaft to achieve different transmission ratios. The water pump main shaft is arranged parallel to the spline main shaft and one end of the spline main shaft extends into the pump body to drive the pump body to operate. Several driven gears with different diameters that mesh with the shift gear are fixed on the water pump main shaft. The shift assembly extends from the outside of the housing to the inside and is connected to the shift gear. The shift gear is driven to mesh or separate with the driven gear by pulling the shift assembly to achieve gear shifting. The diameter of the shift gear is larger than the driven gear to achieve a speed-increasing effect.

[0076] 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 arranged 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 sliding slots are provided between the shift slots to allow the shift handle to move;

[0077] The shift handle includes a fixed handle, a spring and a gear fixing sleeve. The fixed handle passes through the gear slot and is connected to the shift rod. The gear fixing sleeve is sleeved on the outside of the fixed handle and the diameter of the end of the gear fixing sleeve that contacts the gear slot is larger than the diameter of the sliding slot and less than or equal to the diameter of the gear slot. The spring is sleeved on the outside of the fixed handle and is inside the gear 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 fixing sleeve.

[0078] On this basis, the shift gear can be provided with two, the two are interconnected and run synchronously. When one of the shift gears is engaged with the driven gear, the other shift gears are idle.

[0079] There are two shift gears, namely the first gear and the second gear. The diameter of the first gear is smaller than that of the second gear. There are two driven gears, namely the first gear driven wheel and the second gear driven wheel. The first gear driven wheel and the first gear gear are arranged on the same side and mesh with each other for transmission. There are two gear slots, namely the first gear slot and the second gear slot.

[0080] In order to improve the heat dissipation performance of the water pump, the pump body of the present invention includes a connecting flange and a pump chamber. The connecting flange is detachably connected to the outer shell of the speed increasing gear box and is sleeved on the outside of the main shaft of the water pump. A cooling water tank is provided on the outer wall of the outer shell, which surrounds the outside of the bearing and is used to reduce the working temperature of the bearing. A circulating water channel connected to the pump chamber is provided inside the side wall of the connecting flange and is connected to the cooling water tank to achieve heat transfer and dissipation. During the pumping process, the water pumped by the pump body can enter the cooling water tank through the circulating water channel and then return to the pump body, thereby cooling the bearings of the connecting flange and the speed increasing gear box and the nearby structures, thereby extending the service life.

[0081] In addition, a power input part connected to an external drive device is provided at the power input end of the water pump main shaft; a water pumping turbine connected to the power output end of the water pump main shaft is provided inside the pump chamber. The water pumping turbine can be provided with one or two connected in an inner and outer nesting manner to improve the pumping efficiency. The pump chamber is provided with a water inlet channel on the axial outer side of the water pump main shaft, and a water outlet channel is provided on the circumferential outer side of the water pumping turbine to achieve the inflow and outflow of water.

[0082] When switching to the first gear, the gear fixing sleeve is pulled to compress the spring so that it is pulled out of the original gear slot. While pulling the gear fixing sleeve, the fixed handle is pushed to drive the shift lever to move until the gear fixing sleeve is aligned with the first gear slot. During the pulling process, the fixed handle moves along the sliding slot; the gear fixing sleeve is released, and under the action of the spring, the gear fixing sleeve automatically rebounds into the first gear slot. At this time, the first gear is meshed with the first gear driven wheel, thereby driving the water pump main shaft to drive the pump body to pump water. At this time, the second gear is idling;

[0083] When switching to the second gear, the operation is similar to switching to the first gear. You only need to insert the gear fixing sleeve into the second gear slot. At this time, the second gear gear is engaged with the second gear driven wheel, thereby driving the water pump main shaft to drive the pump body to pump water. At this time, the first gear gear is idling.

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

[0085] Embodiment 3: Three-speed speed increase

[0086] The difference from Example 2 is that there are three shift gears, namely, 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 arranged between the first gear and the second gear. There are three driven gears, namely, a first gear driven wheel, a second gear driven wheel and a third gear driven wheel. The third gear driven wheel is arranged between the first gear driven wheel and the second gear driven wheel. The first gear driven wheel is arranged on the same side as the first gear and meshes with the transmission. There are three gear slots, namely, a first gear slot, a second gear slot and a third gear slot. The third gear slot is arranged between the first gear slot and the second gear slot.

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

[0088] Based on Examples 1-3, it can be clearly concluded that improvements to fourth, fifth, or even higher gears can be made based on this structure. Therefore, inspired by this structure, higher-gear water pumps based on this structure should also be within the scope of protection of this application.

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

[0090] A speed-increasing multi-speed variable-speed water pump comprises a speed-increasing gearbox and a pump body detachably connected thereto. The speed-increasing gearbox comprises a housing, a spline housing and a drive device connected to the outside of the spline housing. Several shift gears with different diameters are arranged along the spline main shaft to achieve different transmission ratios. The water pump main shaft is arranged parallel to the spline main shaft and one end of the water pump main shaft extends into the pump body to drive the pump body to operate. Several driven gears with different diameters that mesh with the shift gear are fixed on the water pump main shaft. The shift assembly extends from the outside of the housing to the inside and then connects to the shift gear. The shift assembly is pulled to drive the shift gear to mesh or separate with the driven gear to achieve gear shifting. The diameter of the shift gear is larger than the driven gear to achieve a speed-increasing effect.

[0091] 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 arranged 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 sliding slots are provided between the shift slots to allow the shift handle to move;

[0092] The shift handle includes a fixed handle, a spring and a gear fixing sleeve. The fixed handle passes through the gear slot and is connected to the shift rod. The gear fixing sleeve is sleeved on the outside of the fixed handle and the diameter of the end of the gear fixing sleeve that contacts the gear slot is larger than the diameter of the sliding slot and less than or equal to the diameter of the gear slot. The spring is sleeved on the outside of the fixed handle and is inside the gear 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 fixing sleeve.

[0093] On this basis, two shift gears are provided, and when one of the shift gears is engaged with the driven gear, the other shift gears idle.

[0094] There are two shift gears, namely, a driving shift gear and a driven shift gear. The driving shift gear is slidably connected to the spline main shaft and rotates synchronously. The driven shift gear is sleeved on the outside of the spline main shaft and is rotationally connected thereto. 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 is provided with a driving meshing tooth on one side close to the driven shift gear, and the driven shift gear is provided with a driven meshing tooth on one side close to the driving shift gear.

[0095] There are two driven gears, namely the first driven wheel and the second driven wheel. The first driven wheel is arranged on the same side as the active 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 active meshing teeth mesh with the driven meshing teeth, the second driven wheel meshes with the driven shift gear for transmission.

[0096] In order to improve the heat dissipation performance of the water pump, the pump body of the present invention includes a connecting flange and a pump chamber. The connecting flange is detachably connected to the outer shell of the speed increasing gear box and is sleeved on the outside of the main shaft of the water pump. A cooling water tank is provided on the outer wall of the outer shell, which surrounds the outer side of the bearing and is used to reduce the working temperature of the bearing. A circulating water channel connected to the pump chamber is provided inside the side wall of the connecting flange and is connected to the cooling water tank to achieve heat transfer and dissipation.

[0097] In addition, a power input part connected to an external drive device is provided at the power input end of the water pump main shaft; a water pumping turbine connected to the power output end of the water pump main shaft is provided inside the pump chamber. The water pumping turbine can be provided with one or two connected in an inner and outer nesting manner to improve the pumping efficiency. The pump chamber is provided with a water inlet channel on the axial outer side of the water pump main shaft, and a water outlet channel is provided on the circumferential outer side of the water pumping turbine to achieve the inflow and outflow of water.

[0098] In this embodiment, when the active shift gear meshes with the first driven wheel, it is regarded as the first gear. At this time, the driven shift gear is connected to the spline main shaft in rotation, and the internal locking teeth of the active shift gear cooperate with the grooves on the spline main shaft. When the spline main shaft rotates, the active shift gear rotates accordingly and further drives the first driven wheel to rotate and then drives the water pump main shaft to rotate; at this time, the driven shift gear rotates relative to the spline main shaft and cannot effectively drive the second driven wheel to rotate. Referring to the working principle of the shift assembly of embodiment 2, the second gear switching of this example is realized. The difference is that after the second gear is switched in this embodiment, the active meshing teeth on one side of the active shift gear mesh with the driven meshing teeth on one side of the driven shift gear. At this time, when the spline main shaft rotates, the active shift gear can effectively drive the driven shift gear to rotate through the active shift gear, and then the driven shift gear drives the second driven wheel to rotate to drive the water pump main shaft. In the second gear state, the active shift gear is disengaged from the first driven wheel, so the active shift gear will not drive the water pump main shaft to rotate through the first driven wheel.

[0099] When speed increase is not required, the water pump is driven by connecting the power input member at the end of the water pump main shaft through an external drive device. At this time, in order to avoid wear of the speed increase gearbox, the shift assembly can be pulled to put the speed increase gearbox in neutral, that is, the active shift gear does not mesh with the first driven wheel, and the active meshing teeth do not mesh with the driven meshing teeth.

[0100] On the basis of Example 4, improvements to third gear, fourth gear or even higher gears can be made under this form. Therefore, inspired by this structure, higher-grade 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 Example 1 or 2 or 3 or 4, two rows of water pump main shafts are symmetrically arranged about the spline main shaft, and each water pump main shaft is connected to a pump chamber through a connecting flange; the shift gears on the spline main shaft are respectively meshed with the driven gears on the two water pump main shafts for transmission.

[0103] Through a spline main shaft and the shift gear thereon, two water pump main shafts are driven to drive their respective pump bodies to operate to achieve the purpose of "one to two", that is, one gear box drives two pump bodies, thereby increasing the water pumping capacity.

[0104] To meet the needs of specific applications, more water pump main shafts, driven gears and pump bodies can be added according to the structural addition method of the embodiment according to actual needs to achieve "one to three, one to four...". This addition method should be set according to the actual operating capacity of the gearbox to avoid overload operation.

[0105] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A multi-speed variable speed water pump, characterized in that: The invention comprises a speed-increasing gearbox (1) and a pump body (2) detachably connected thereto; the speed-increasing gearbox (1) comprises a housing (3), a spline main shaft (4), a shift gear (5), a shift assembly (6) and a water pump main shaft (7); the main body of the spline main shaft (4) is located inside the housing (3) and is rotatably connected to the housing (3); one end of the spline main shaft (4) extends to the outside of the housing (3) to connect to a driving device; a plurality of shift gears (5) are provided along the spline main shaft (4) and have different diameters; the water pump main shaft (7) ) is arranged in parallel with the spline main shaft (4) and one end of the water pump main shaft (7) extends into the pump body (2) to drive the pump body (2) to operate; a plurality of driven gears (8) of different diameters that mesh with the shift gear (5) are fixed on the water pump main shaft (7); the shift assembly (6) extends from the outside of the housing (3) to the inside and then connects to the shift gear (5); the shift assembly (6) is pulled to drive the shift gear (5) to mesh with or separate from the driven gear (8) to achieve gear shifting; the diameter of the shift gear (5) is larger than that of the driven gear (8).

2. The multi-speed variable speed water pump according to claim 1, characterized in that: The shift gear (5) is provided with one, and the driven gear (8) is also provided with one, and the shift gear (5) is meshed with or disengaged from the driven gear (8).

3. The multi-speed variable speed water pump according to claim 1, characterized in that: The shift assembly (6) comprises a shift rod (27), a gear sleeve (28) and a shift handle (29); the gear sleeve (28) is fixed to the outside of the housing (3); the shift rod (27) is arranged 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 sliding slots (10) are provided between the gear slots (9) to allow the shift handle (29) to move; The shift handle (29) comprises a fixed handle (30), a spring (31) and a gear fixing sleeve (32); the fixed handle (30) passes through the gear slot (9) and is connected to the shift rod (27); the gear fixing sleeve (32) is sleeved on the outside of the fixed handle (30); the diameter of one end of the gear fixing sleeve (32) in contact with the gear slot (9) is greater than the diameter of the sliding slot (10) and less than or equal to the diameter of the gear slot (9); the spring (31) is sleeved on the outside of the fixed handle (30) and is located inside the gear 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 fixing sleeve (32).

4. The multi-speed variable speed water pump 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 main shaft (4), the shift gears (5) are connected to each other and operate synchronously, and when one of the shift gears (5) is engaged with the driven gear (8), the other shift gears (5) are idle.

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

6. The multi-speed variable speed water pump according to claim 4, characterized in that: The shift gear (5) is provided with three gears, namely, 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); the third gear (17) is arranged between the first gear (11) and the second gear (12); the driven gear (8) is provided with three gears, namely, 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 arranged between the first gear driven wheel (13) and the second gear driven wheel (14); the first gear driven wheel (13) and the first gear gear (11) are arranged on the same side and mesh with each other for transmission; The gear slots (9) are provided with three gear slots, namely a first gear slot (15), a second gear slot (16) and a third gear slot (19); the third gear slot (19) is arranged between the first gear slot (15) and the second gear slot (16).

7. The multi-speed variable speed water pump according to claim 3, characterized in that: The shift gear (5) is provided with two, namely, an active shift gear (33) and a driven shift gear (34); the active 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 is rotationally connected thereto; the shift assembly (6) extends from the outside to the inside of the housing (3) and is connected to the active shift gear (5); a side of the active shift gear (33) close to the driven shift gear (34) is provided with an active meshing tooth (35); a side of the driven shift gear (34) close to the active shift gear (33) is provided with a driven meshing tooth (36); The driven gear (8) is provided with two, 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 active shifting gear (33) and meshes with each other for transmission; the second driven wheel (38) is arranged on the same side as the driven shifting gear (34); after the active meshing teeth (35) mesh with the driven meshing teeth (36), the second driven wheel (38) meshes with the driven shifting gear (34) for transmission.

8. A multi-speed variable speed water pump according to any one of claims 1 to 7, characterized in that: The pump body (2) comprises a connecting flange (20) and a pump chamber (21); the connecting flange (20) is detachably connected to the housing (3) of the speed increasing gear box (1) and is sleeved on the outside of the water pump main shaft (7); the water pump main shaft (7) is rotatably connected to the housing (3) via a bearing; a circulating water channel (22) communicating with the pump chamber (21) is provided inside the side wall of the connecting flange (20); a cooling water tank (23) connected to the circulating water channel (22) is provided on the outer wall of the housing (3); and the cooling water tank (23) surrounds the outside of the bearing.

9. The 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 member (39) connected to an external drive device; the pump chamber (21) is provided with a water pumping turbine (24) connected to the power output end of the water pump main shaft (7); the pump chamber (21) is provided with a water inlet channel (25) on the axial outside of the water pump main shaft (7); the pump chamber (21) is provided with a water outlet channel (26) on the circumferential outside of the water pumping turbine (24); the water pumping turbine (24) is provided with one or two water pumping turbines (24) connected in an inner and outer nested manner.

10. The multi-speed variable speed water pump according to claim 9, characterized in that: The water pump main shaft (7) is symmetrically provided with two rows about the spline main shaft (4), and each water pump main shaft (7) is connected to a pump chamber (21) via a connecting flange (20); the shift gear (5) on the spline main shaft (4) is meshed with the driven gears (8) on the two water pump main shafts (7) on both sides for transmission.

Images