A high pressure washer pump
By designing a high-pressure washer water pump that utilizes a motor-driven swashplate rotation and the reciprocating motion of an elastic plunger assembly, the problems of large size, heavy weight, and high noise of existing water pumps have been solved, achieving flexible water pressure adjustment and noise reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIUCHENG CLEANING EQUIPMENT CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-12
AI Technical Summary
Existing high-pressure cleaners suffer from problems such as large size and heavy weight of the water pump, fixed pressure settings that cannot be flexibly adjusted, and excessive noise.
Design a high-pressure washer water pump, including a motor, a hydraulic cylinder, a swashplate, a pump body, a pump cover, and an elastic plunger assembly. The motor drives the swashplate to rotate, causing the plunger to reciprocate. Combined with the elastic return of the spring, the water pressure is enhanced. The motor speed is adjusted by a controller to regulate the water pressure.
This results in a smaller, more compact water pump with adjustable water pressure in multiple settings, reduced noise, and improved flexibility and stability.
Smart Images
Figure CN224352049U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of pumps, and in particular relates to a high-pressure washer water pump. Background Technology
[0002] A high-pressure washer is a machine that uses high-pressure water jets to clean the surface of objects. Besides being the ideal cleaning tool for various vehicles and construction machinery, high-pressure washers can also be used to clean building exteriors, floors, bathtubs, and swimming pools. They are particularly effective at cleaning doors, windows, floors, toilets, oil stains, and corners that are difficult to clean manually. The water pump, as the core component of a high-pressure washer, provides the high-pressure water. Existing high-pressure washer pumps typically mount the induction motor and hydraulic cylinder on a bracket, resulting in problems such as large size, heavy weight, fixed pressure settings without flexible adjustment, and high noise levels. Utility Model Content
[0003] The purpose of this utility model is to solve at least one problem of the prior art and to propose a high-pressure washer water pump.
[0004] To achieve the above objectives, this utility model proposes a high-pressure washer water pump, comprising a motor, a hydraulic cylinder, a swashplate, a pump body, a pump cover, a controller, and several elastic plunger assemblies. One end of the motor's output shaft is inserted into the hydraulic cylinder and connected to the first end of the swashplate. The first end of the hydraulic cylinder abuts against the motor, and the second end of the hydraulic cylinder is connected to the pump body. The swashplate is located inside the hydraulic cylinder, and its first end has an inclined surface. The elastic plunger assembly includes a plunger and a spring. The first end of the plunger abuts against the second end of the swashplate, and the second end of the plunger passes through the pump body and the pump cover. The plunger is fitted with a spring baffle on its outer side, and the spring is sleeved on the outside of the plunger. The two ends of the spring abut against the spring baffle and the pump body, respectively. The pump cover is connected to the pump body and has an inlet, an outlet, a water flow channel, and a connecting hole for connecting the plunger. The water flow channel is connected to the inlet, outlet, and connecting hole. The motor drives the swashplate to rotate, causing the plungers of each elastic plunger assembly to move back and forth, thereby increasing the water pressure in the water flow channel. The controller is electrically connected to the motor and controls the motor speed to achieve water pressure regulation.
[0005] As an optional implementation, a first bearing is fitted on the outer side of the output shaft of the motor, the inclined surface of the first end of the swashplate abuts against the first bearing, a second bearing is fitted on the second end of the swashplate, and the first end of the plunger abuts against the second bearing.
[0006] As an optional implementation, the second end of the swashplate is provided with a bearing mounting post, and the second bearing is fitted onto the outside of the bearing mounting post.
[0007] As an optional implementation, the inlet and outlet are respectively equipped with a water inlet pipe connector and a water outlet gun, and the water outlet gun is equipped with a control switch for controlling the water outlet gun switch.
[0008] As an optional implementation, the motor is a permanent magnet synchronous motor, which is electrically connected to a frequency converter, which is used to adjust the operating frequency of the motor.
[0009] As an optional implementation, the high-pressure washer water pump also includes a remote controller, which is connected to the controller via wireless communication to complete control signal interaction.
[0010] As an optional implementation, the number of elastic plunger assemblies is 2, 3, or 4, and the pump body is provided with mounting posts of the same number as the number of plungers, with channels for the plungers to pass through inside the mounting posts.
[0011] As an optional implementation, a fastening ring is installed on the outside of the plunger. The diameter of the fastening ring is larger than the diameter of the channel. The fastening ring is fitted to the side of the pump body near the pump cover and abuts against the port of the channel.
[0012] As an optional implementation, a sealing piston is provided inside the connection hole. The sealing piston can move axially along the connection hole and is connected to the second end of the plunger.
[0013] As an optional implementation, the cylinder and pump body, and the pump body and pump cover are detachably connected by bolts.
[0014] The beneficial effects of this utility model are as follows: By coaxially mounting the motor, oil cylinder, pump body, and pump cover, the motor output shaft rotates to drive the swashplate to rotate and move the plunger. The spring elastic reset allows the plunger to return to its original position. The reciprocating movement of the plunger increases the water pressure in the water flow channel. The controller regulates the motor speed to achieve water pressure regulation. This makes the overall size of the water pump smaller and the installation more compact. It can also adjust the water pressure in multiple levels as needed.
[0015] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.
[0017] Figure 2 This is a schematic diagram of the installation of the oil cylinder, pump body and pump cover according to an embodiment of the present utility model.
[0018] Figure 3 This is a partial installation structure diagram of an embodiment of the present utility model.
[0019] Figure 4 This is a schematic diagram of the hydraulic cylinder structure according to an embodiment of the present invention.
[0020] Figure 5 This is a schematic diagram of the pump cover structure according to an embodiment of the present invention.
[0021] Figure 6 This is a schematic diagram of the pump cover structure according to an embodiment of the present invention.
[0022] Figure 7 This is a schematic diagram of the pump body structure according to an embodiment of the present invention.
[0023] Figure 8 This is a schematic diagram of the pump body structure according to an embodiment of the present invention.
[0024] Figure 9 This is a schematic diagram of the swashplate structure according to an embodiment of the present invention.
[0025] Figure 10 This is a schematic diagram of the swashplate structure according to an embodiment of the present invention.
[0026] Figure 11 This is a front sectional view of an embodiment of the present utility model.
[0027] In the diagram: 1. Motor; 2. Hydraulic cylinder; 3. Pump body; 4. Pump cover; 5. Plunger; 6. Spring; 7. Inlet pipe connector; 8. Outlet gun; 9. Swashplate; 10. Output shaft; 11. First bearing; 21. Bushing; 31. Mounting post; 90. Bearing mounting post; 91. Second bearing. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. In the description of this application, it should be noted that the terms "inner," "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" 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 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 application based on the specific circumstances.
[0030] The present invention will now be described in detail with reference to the accompanying drawings.
[0031] See Figures 1 to 11 This embodiment provides a high-pressure washer water pump, including a motor 1, a hydraulic cylinder 2, a swashplate 9, a pump body 3, a pump cover 4, a controller, and several elastic plunger assemblies. One end of the output shaft 10 of the motor 1 is inserted into the hydraulic cylinder 2 and connected to the first end of the swashplate 9 by fasteners. The first end of the hydraulic cylinder 2 abuts against the motor 1, and the second end of the hydraulic cylinder 2 is connected to the pump body 3. The swashplate 9 is located inside the hydraulic cylinder 2, and the first end of the swashplate 9 is provided with an inclined surface. The elastic plunger assembly includes a plunger 5 and a spring 6. The first end of the plunger 5 abuts against the second end of the swashplate 9, and the second end of the plunger 5 passes through the pump body 3 and is connected to the pump cover 4. A spring baffle is provided on the side, and the spring 6 is sleeved on the outside of the plunger 5. The two ends of the spring 6 abut against the spring baffle and the pump body 3 respectively. The pump cover 4 is connected to the pump body 3. The pump cover 4 is provided with an inlet, an outlet, a water flow channel and a connecting hole for connecting the plunger 5. The water flow channel is connected to the inlet, outlet and connecting hole. The motor 1 drives the swashplate 9 to rotate. The inclined end face of the swashplate 9 causes the plunger 5 to move. Through the reset action of the spring 6, the plunger 5 can reciprocate, which increases the water pressure in the water flow channel. The controller is electrically connected to the motor 1 and controls the speed of the motor 1 to achieve water pressure regulation.
[0032] The first end of the hydraulic cylinder 2 is provided with a bushing 21. The motor 1 includes an end cover, a housing, magnets, a stator frame, a stator, and an output shaft 10. The stator is mounted on the stator frame. The end cover is provided with multiple magnets located outside the stator. The housing is mounted on the end cover and encloses the stator, stator frame, and magnets. The output shaft 10 passes through the end cover and stator frame. The stator frame of the motor 1 is fitted onto the outside of the bushing. The inside of the hydraulic cylinder 2 is provided with a stepped groove, and the first bearing 11 is fitted into the stepped groove. Compared to the existing water pump motor with a length of 191mm and a diameter of 144mm, the motor of this application is only 90.5mm long and 95mm in diameter. The motor 1 of this application does not require a bracket when installed with the hydraulic cylinder 2. By adding a bushing 21 at the end of the hydraulic cylinder 2, the contact surface and fixing surface of the output shaft 10 of the motor 1 are strengthened, reducing the volume of the water pump while improving the stability of the motor.
[0033] When the pump is powered on, the output shaft 10 rotates after the motor 1 starts. The rotation of the output shaft 10 drives the swashplate 9 to rotate. After the swashplate 9 rotates, it drives several plungers 5 to move under the action of the inclined end face. Due to the thickness difference between the high and low points of the inclined surface of the swashplate, the distance that the plungers 5 move towards the pump body 3 will be different. After the plungers 5 move, the pressure in the water flow channel inside the pump cover 4 increases, realizing the high pressure output of the pump. The spring 6 plays an elastic reset role, allowing the plungers 5 to reset.
[0034] In this embodiment, refer to Figure 3 The output shaft 10 of motor 1 is fitted with a first bearing 11 on the outside. The inclined surface of the first end of swashplate 9 abuts against the first bearing 11. The second end of swashplate 9 is fitted with a second bearing 91. The first end of plunger 5 abuts against the second bearing 91.
[0035] In this embodiment, refer to Figure 9 The second end of the swash plate 9 is provided with a bearing mounting post 90, and the second bearing 91 is fitted onto the outside of the bearing mounting post 90.
[0036] In this embodiment, refer to Figure 1 The inlet and outlet are respectively equipped with a water inlet pipe connector 7 and a water outlet gun 8, and the water outlet gun 8 is equipped with a control switch for controlling the water outlet gun switch.
[0037] In this embodiment, the motor 1 is a permanent magnet synchronous motor, which is electrically connected to a variable frequency drive (VFD). The VFD is used to adjust the operating frequency of the motor, thereby adjusting the motor speed. For ease of control, the VFD is electrically connected to a controller, which controls the operation of the VFD.
[0038] In this embodiment, the high-pressure washer water pump also includes a remote control, which connects to the controller wirelessly to exchange control signals. Wireless communication methods include, but are not limited to, Bluetooth, infrared, or 5G network communication. This allows users to remotely control the water pump's operating status.
[0039] In this embodiment, the number of elastic plunger assemblies is 2, 3, or 4. The pump body 3 is provided with the same number of mounting posts 31 as the number of plungers 5, and the mounting posts 31 are provided with channels for the plungers 5 to pass through. The number of elastic plunger assemblies can be arbitrarily set according to installation and usage requirements.
[0040] In this embodiment, a fastening ring is installed on the outside of the plunger 5. The diameter of the fastening ring is larger than the diameter of the channel. The fastening ring is installed on the side of the pump body 3 near the pump cover 4 and abuts against the port of the channel, so that the plunger 5 is not easy to loosen or fall off.
[0041] In this embodiment, a sealing piston is provided inside the connection hole. The sealing piston can move axially along the connection hole and is connected to the second end of the plunger 5.
[0042] In this embodiment, the cylinder 2 and the pump body 3, and the pump body 3 and the pump cover 4 are detachably connected by bolts. To improve sealing, sealing rings can also be provided between the cylinder 2 and the pump body 3, and between the pump body 3 and the pump cover 4.
[0043] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.
Claims
1. A water pump for a high-pressure washer, characterized in that: The system includes a motor, a hydraulic cylinder, a swashplate, a pump body, a pump cover, a controller, and several elastic plunger assemblies. One end of the motor's output shaft is inserted into the hydraulic cylinder and connected to the first end of the swashplate. The first end of the hydraulic cylinder abuts against the motor, and the second end of the hydraulic cylinder is connected to the pump body. The swashplate is located inside the hydraulic cylinder, and its first end has an inclined surface. Each elastic plunger assembly includes a plunger and a spring. The first end of the plunger abuts against the second end of the swashplate, and the second end of the plunger passes through the pump body and connects to the pump cover. A spring baffle is provided on the outside of the plunger, and the spring is sleeved on the outside of the plunger. The two ends of the spring abut against the spring baffle and the pump body, respectively. The pump cover is connected to the pump body and has an inlet, an outlet, a water flow channel, and a connecting hole for connecting the plunger. The water flow channel is connected to the inlet, outlet, and connecting hole. The motor drives the swashplate to rotate, causing the plungers of each elastic plunger assembly to reciprocate, thereby increasing the water pressure in the water flow channel. The controller is electrically connected to the motor and controls the motor's speed to achieve water pressure regulation.
2. The high-pressure washer water pump as described in claim 1, characterized in that: The output shaft of the motor is fitted with a first bearing, the inclined surface of the first end of the swashplate abuts against the first bearing, the second end of the swashplate is fitted with a second bearing, and the first end of the plunger abuts against the second bearing.
3. The high-pressure washer water pump as described in claim 2, characterized in that: The second end of the swash plate is provided with a bearing mounting post, and the second bearing is fitted onto the outside of the bearing mounting post.
4. The high-pressure washer water pump as described in claim 1, characterized in that: The inlet and outlet are respectively equipped with a water inlet pipe connector and a water gun, and the water gun is equipped with a control switch for controlling the water gun switch.
5. The high-pressure washer water pump as described in claim 1, characterized in that: The motor is a permanent magnet synchronous motor, which is electrically connected to a frequency converter, which is used to adjust the operating frequency of the motor.
6. The high-pressure washer water pump as described in claim 1, characterized in that: It also includes a remote controller, which connects to the controller via wireless communication to exchange control signals.
7. The high-pressure washer water pump as described in claim 1, characterized in that: The number of elastic plunger assemblies is 2, 3, or 4, and the pump body is provided with mounting posts of the same number as the number of plungers, with channels inside the mounting posts for the plungers to pass through.
8. The high-pressure washer water pump as described in claim 7, characterized in that: A fastening ring is installed on the outside of the plunger. The diameter of the fastening ring is larger than the diameter of the channel. The fastening ring is fitted and installed on the side of the pump body near the pump cover and abuts against the port of the channel.
9. The high-pressure washer water pump as described in claim 1, characterized in that: A sealing piston is provided inside the connection hole. The sealing piston can move axially along the connection hole and is connected to the second end of the plunger.
10. The high-pressure washer water pump as described in claim 1, characterized in that: The cylinder and pump body, and the pump body and pump cover are detachably connected by bolts.