A hand-held cleaning machine

Abstract

The application discloses a handheld cleaning machine, which comprises a motor assembly, a pump assembly, a trigger, a water inlet valve assembly and a water outlet pipe. The motor assembly and the pump assembly are connected to form a motor-pump unit. The water outlet pipe is detachably installed on the pump assembly at an end away from the motor assembly. The water inlet valve assembly comprises a water inlet valve body, which is provided with a fixed arm. The pump assembly is fixed above the water inlet valve assembly through connection with the fixed arm. The trigger is rotatably installed at one end of the fixed arm and is used for controlling the on-off of a water circuit. The water inlet valve assembly and the trigger are installed on the motor-pump unit, so that the motor-pump unit becomes an independent functional unit with the function of controlling the water circuit. In addition, a control switch is installed on the motor assembly, so that the motor-pump unit simultaneously becomes an independent functional unit with the function of controlling the circuit. The application has the advantages of compact structure, low cost, small noise and the ability of completing test without assembling a machine shell.

Description

Technical Field

[0001] This invention relates to the field of cleaning machines, specifically a handheld cleaning machine. Background Technology

[0002] Driven by the pursuit of convenience, battery-powered handheld cleaning machines are becoming increasingly widespread. Currently, most handheld cleaning machines on the market use single-plunger pumps, but these machines suffer from one or more of the following drawbacks: 1. The motor pump unit, inlet valve (if any), trigger, and control switch are structurally loosely arranged with low integration. For example, the inlet valve body is not directly connected to the pump body but is connected via another transition piece, or the trigger and control switch are mounted on the housing. This results in a relatively large overall size for the gun-shaped design of the cleaning machine, leading to a poor user experience; 2. The motor pump, inlet valve, trigger, and control switch all rely on the gun-shaped housing as a mounting base, with the housing connecting them into a functional unit. During manufacturing, if defective products require rework by disassembling the housing, this can damage the surface of the housing and other parts, increasing manufacturing costs; 3. The relative dimensions of the motor pump, inlet valve, trigger, and control switch all relying on the gun-shaped housing as a mounting base increase the size chain of mounting holes, adding to the control costs of manufacturing. 4. Use external meshing transmission or planetary gear transmission: External meshing transmission results in a large center distance between the pump and the motor, which leads to high gear noise and a larger overall size; while planetary gear transmission allows the pump and motor to be coaxial, its structure is more complex and its transmission efficiency is lower. Summary of the Invention

[0003] In view of this, the present invention provides a handheld cleaning machine in which the inlet valve assembly and trigger are mounted on the motor pump unit, making the motor pump unit an independent functional unit with water circuit control. In addition, the control switch is mounted on the motor assembly, making the motor pump unit an independent functional unit with control circuit. The machine has a compact structure, low cost, low noise, and can be tested without the need for a housing.

[0004] The present invention provides a handheld cleaning machine, comprising a motor assembly, a pump assembly, a trigger, a water inlet valve assembly, and a water outlet pipe. The motor assembly and the pump assembly are connected to form a motor-pump unit. The water outlet pipe is detachably mounted on the pump assembly at one end away from the motor assembly. The water inlet valve assembly includes a water inlet valve body with a fixed arm. The pump assembly is fixed above the water inlet valve assembly by connecting to the fixed arm. The trigger is rotatably mounted on one end of the fixed arm and is used to control the flow of water.

[0005] Furthermore, the motor assembly includes a pinion and a motor bracket, the pump assembly includes a large gear, the motor assembly is connected to one side of the motor bracket, the pump assembly is connected to the other side of the motor bracket, and the pinion passes through the motor bracket and meshes with the large gear.

[0006] Furthermore, it also includes a control switch, which is fixed on the motor assembly and is used to control the on / off state of the circuit.

[0007] Furthermore, the motor assembly includes a motor bracket, on which a positioning pin and a support column are provided, and the control switch is fixed to the motor bracket via the positioning pin and the support column.

[0008] Furthermore, the motor assembly also includes a motor, the pinion is mounted on the output shaft of the motor, and the motor bracket is provided with a motor mounting stop and motor mounting screw holes on the side near the motor. The motor mounting stop is used for positioning and mounting the motor, and the motor mounting screw holes are arranged on both radial sides of the motor mounting stop. The motor bracket is fixed to the outer casing end face on the output side of the motor by the cooperation of the motor mounting screw holes and screws.

[0009] Furthermore, the positioning pin and the support column are disposed at the bottom of the motor bracket near the motor side, and the control switch is provided with a pin hole of the corresponding position and size to the positioning pin. The control switch is fixed to the motor bracket by the cooperation of the pin hole and the positioning pin, and by the support column abutting against the side of the control switch.

[0010] Furthermore, the motor bracket has a pump mounting stop and pump mounting screw holes on the side away from the motor. The pump mounting stop is used to position the pump assembly for installation. The pump mounting screw holes are arranged around the outer ring of the motor bracket. The pump assembly includes a pump body. The pump body has a mounting part at one end near the motor bracket. The mounting part is hollow in the middle. The large gear is disposed on the inner wall of the mounting part. The mounting part has a motor bracket mounting stop corresponding to the pump mounting stop. The motor bracket mounting stop is used for positioning and installation with the motor bracket. The outer periphery of the mounting part has motor bracket mounting screw holes with the same position and size as the pump mounting screw holes. The motor bracket is positioned and installed with the pump body through the pump mounting stop and the motor bracket mounting stop, and then fixed to the pump body through the cooperation of the motor bracket mounting screw holes, the pump mounting screw holes, and screws.

[0011] Furthermore, the motor bracket is provided with a pinion through hole and a small bearing chamber on the side away from the motor. The pinion through hole is located inside the pump mounting stop and communicates with the motor mounting stop. The pinion meshes with the large gear by passing through the pinion through hole. The small bearing chamber is also located inside the pump mounting stop and below the pinion through hole, and is concentrically arranged with the pump mounting stop for placing the small bearing.

[0012] Furthermore, a grease baffle is provided on the side of the motor bracket away from the motor, and the grease baffle is arranged around the small bearing chamber.

[0013] Furthermore, the pump body is provided with a large bearing chamber, a drive chamber, and a plunger hole. The large bearing chamber, drive chamber, plunger hole, and the middle part of the mounting part are sequentially connected. The large bearing chamber, drive chamber, and plunger hole are distributed sequentially from the mounting part to the side of the pump body away from the mounting part. The large bearing chamber and drive chamber are arranged along the length direction of the pump body, and the plunger hole is arranged along the width direction of the pump body. The large bearing chamber is used to house the large bearing, the drive chamber is used to house the drive bearing, and the plunger hole is used to house the plunger. The small bearing, large bearing, and drive bearing are all arranged around the gear shaft. One end of the gear shaft is connected to the motor bracket, and the other end is connected to the plunger. Under the drive of the motor assembly, the large gear, and the small gear, the plunger performs reciprocating motion.

[0014] Furthermore, the pump body is also provided with an inlet channel, an inlet one-way valve branch, an outlet one-way valve branch, and an outlet channel. The inlet channel is connected to the inlet valve assembly, and one end of the outlet channel is provided with an outlet port, which is connected to the outlet pipe. The inlet one-way valve branch and the outlet one-way valve branch are both arranged along the width direction of the pump body. Under the reciprocating motion of the plunger, water passes through the inlet one-way valve branch, the outlet one-way valve branch, the outlet channel, and the outlet port in sequence before being sprayed out from the outlet pipe.

[0015] Furthermore, there is a pressure relief hole between the water inlet channel and the water outlet channel. The water inlet channel is equipped with a safety valve core and a spring. When the water pressure inside the water outlet pipe is normal, the push rod of the safety valve core extends out of the pressure relief hole, and the pressure relief hole is blocked. When the water pressure inside the water outlet pipe is abnormal, the push rod of the safety valve core can disengage from the pressure relief hole under water pressure, and water can enter the water inlet channel from the pressure relief hole and be discharged.

[0016] Furthermore, the pump assembly also includes a left pump cover and a right pump cover. The pump body, the left pump cover, and the right pump cover are provided with screw mounting holes at both the upper and lower ends. The pump body, the left pump cover, and the right pump cover are fixed together by the screw mounting holes, screws, and nuts.

[0017] Furthermore, the left and right pump covers have the same structure, both having an inlet check valve hole, an outlet check valve hole, and a water seal mounting cavity. The inlet check valve hole is connected to the inlet check valve branch, and the outlet check valve hole is also connected to the outlet check valve branch. The water seal mounting cavity is connected to the plunger hole. A connecting hole is also provided between the inlet check valve hole and the outlet check valve hole, allowing water to flow between the inlet check valve branch and the outlet check valve branch through the connecting hole.

[0018] Furthermore, the left and right pump covers are provided with reinforcing ring ribs extending toward the center of the pump body around the screw mounting holes, and the reinforcing ring ribs are used to enhance the installation strength of the screw mounting holes.

[0019] Furthermore, the inlet valve assembly also includes an inlet valve core and a quick connector. The top of the inlet valve body is connected to the inlet channel on the pump body, and a small sealing ring is provided between the top of the inlet valve body and the inlet channel on the pump body to enhance the sealing between the inlet valve body and the pump body. The bottom of the inlet valve body is connected to the quick connector. The inlet valve core is installed inside the inlet valve body, and the inlet valve core can control water to enter the pump body through the inlet valve body under the action of the trigger.

[0020] Furthermore, the fixing arm is located on the side of the water inlet valve body near the motor assembly. The fixing arm has a fixing hole and a support post. The trigger has a mounting hole. The trigger is rotatably mounted on the fixing arm through the cooperation of the mounting hole and the mounting post. The fixing hole can cooperate with the screw mounting holes at the lower ends of the pump body, the left pump cover, and the right pump cover to fix the lower ends of the pump body, the left pump cover, and the right pump cover together with the fixing arm on the water inlet valve body.

[0021] Furthermore, the interior of the water inlet valve body is provided with an interconnected water inlet, water outlet, and valve core push rod outlet. The water inlet valve core is disposed in the water inlet, and the push rod of the water inlet valve core extends out of the valve core push rod outlet and contacts the trigger. Under the control of the trigger, the water inlet channel of the pump body is opened or closed. There is a sealing step and an O-ring chamber between the water inlet and the valve core push rod outlet. The water inlet valve core is provided with a large O-ring and a small O-ring. Both the large O-ring and the small O-ring are located in the O-ring chamber. Under the control of the water inlet valve core and the trigger, the large O-ring contacts or leaves the sealing step, thereby controlling the opening or closing of the water valve.

[0022] Furthermore, a spring and a large sealing ring are provided between the water inlet valve core and the quick connector. The spring is used to reset the water inlet valve core after the trigger pressure is released, and the large sealing ring is used to enhance the sealing between the quick connector and the water inlet valve body. A filter screen is installed inside the quick connector, and the inner diameter of the top end of the quick connector is smaller than the inner diameter of its bottom end.

[0023] Furthermore, the control switch is provided with a contact. When the trigger is pulled upward, the trigger contacts the contact, and the motor pump unit circuit is connected.

[0024] Furthermore, it also includes a housing, a nozzle assembly, a water inlet pipe assembly, and a battery pack. The motor assembly, pump assembly, trigger, control switch, water inlet valve assembly, and water outlet pipe are all located inside the housing. The battery pack is located at the rear of the housing and is electrically connected to the motor assembly. The water inlet pipe assembly is located at the bottom of the housing and is connected to the water inlet valve assembly. The nozzle assembly is located at the head of the housing and is connected to the end of the pump assembly away from the motor assembly via the water outlet pipe.

[0025] Compared with existing technologies, the present invention has the following beneficial technical effects:

[0026] This invention provides a handheld cleaning machine in which the inlet valve assembly and trigger are mounted on the motor pump unit, making the motor pump unit an independent functional unit with water circuit control. In addition, a control switch is mounted on the motor assembly, making the motor pump unit also an independent functional unit with a control circuit. The advantages are: firstly, it facilitates testing during manufacturing without assembling the casing, avoiding the additional costs associated with disassembling the casing in case of quality issues; secondly, this design makes all components more compact, allowing for a smaller casing design, and eliminates the need for dimensional control of the casing and other mounting components, thus reducing dimensional control requirements and manufacturing costs; furthermore, the internal meshing transmission structure further balances the contradictions of the large center distance between the external meshing pump and motor, and the complex and inefficient planetary gear transmission structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating a usage scenario where the water source of this invention is a self-priming water source.

[0028] Figure 2 This is a schematic diagram illustrating a usage scenario where the water source for this invention is tap water.

[0029] Figure 3 This is an exploded view of some components in this invention.

[0030] Figure 4 This is a schematic cross-sectional view of the center plane of some components in this invention.

[0031] Figure 5 This is an exploded view of the control switch and motor assembly in this invention.

[0032] Figure 6 This is a schematic diagram of the structure of the motor bracket near the motor assembly in this invention.

[0033] Figure 7 This is a schematic diagram of the motor bracket near the pump assembly in this invention.

[0034] Figure 8 This is a cross-sectional view of the pump body in this invention.

[0035] Figure 9 This is a cross-sectional view of the left pump cover in this invention.

[0036] Figure 10 This is a schematic diagram of the gear transmission structure in this invention.

[0037] Figure 11 This is an exploded view of the water inlet valve assembly and trigger in this invention.

[0038] Figure 12 This is a schematic diagram of the water inlet valve body structure in this invention.

[0039] Wherein: 10-House; 20-Motor assembly; 21-Motor; 22-Pinary gear; 23-Motor bracket; 23a-Motor mounting stop; 23b-Motor mounting screw hole; 23c-Positioning pin; 23d-Support column; 23e-Pump mounting stop; 23f-Pinary gear through hole; 23g-Small bearing chamber; 23h-Grease retainer; 23i-Pump mounting screw hole; 30-Pump assembly; 31-Pump body; 31a-Screw mounting hole; 31b-Mounting part; 31b1-Motor bracket mounting stop; 31b2-Motor bracket mounting screw hole; 31c-Large bearing chamber; 31d-Drive chamber; 31e-Plunger hole; 31f-Inlet channel; 31g-Inlet check valve branch; 31h-Outlet check valve branch; 31i-Outlet... Water channel; 31j-Outlet port; 31k-Baffle rib; 31l-Pressure relief hole; 32-Left pump cover; 32a-Inlet check valve hole; 32b-Outlet check valve hole; 32c-Water seal mounting cavity; 32d-Connecting hole; 32e-Reinforcing ring rib; 33-Right pump cover; 34-Large gear; 35-Large bearing; 36-Drive bearing; 37-Small bearing; 38-Gear shaft; 39-Plunger; 40-Trigger; 41-Groove; 42-Mounting hole; 50-Control switch; 51-Contact; 60-Inlet valve assembly; 61-Inlet valve body; 61a-Fixing arm; 61a1-Fixing hole; 61a2-Support; 61b-Inlet; 61c-Outlet; 61d-Valve core push rod outlet; 61e-Sealing step; 61f-O 62-Inlet valve core; 63-Quick connector; 64-Large O-ring; 65-Small O-ring; 66-Filter screen; 67-Spring; 68-Large sealing ring; 69-Small sealing ring; 70-Nose assembly; 80-Inlet pipe assembly; 90-Battery pack; 100-Outlet pipe. Detailed Implementation

[0040] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] In the description of this invention, it should be noted that the orientations or positional relationships indicated in this description are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this invention and simplifying the description, and are not intended to 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 invention.

[0042] Please refer to Figure 1-2This invention provides a handheld cleaning machine, comprising a housing 10, a motor assembly 20, a pump assembly 30, a trigger 40, a control switch 50, a water inlet valve assembly 60, a nozzle assembly 70, an inlet pipe assembly 80, a battery pack 90, and an outlet pipe 100. The motor assembly 20, pump assembly 30, trigger 40, control switch 50, water inlet valve assembly 60, and outlet pipe 100 are all located inside the housing 10. The control switch 50 is mounted on the motor assembly 20, the trigger 40 is mounted on the water inlet valve assembly 60, and the water inlet valve assembly 60 is mounted on the bottom of the pump assembly 30. One end of the pump assembly 30 is connected to the motor assembly 20 via internal engagement to form a motor-pump unit. The battery pack 90 is located at the rear of the housing 10 and is electrically connected to the motor-pump unit, providing power to the motor-pump unit. The water inlet pipe assembly 80 is located at the bottom of the housing 10 and is connected to the water inlet valve assembly 60. The water is drawn into the inlet valve assembly 60 by the motor pump unit. The nozzle assembly 70 is located at the head of the housing 10 and connected to the other end of the pump assembly 30 through the outlet pipe 100. The water is transmitted from the inlet valve assembly 60 to the pump assembly 30 and finally to the nozzle assembly 70 for spraying. The present invention installs the inlet valve assembly 60 and the trigger 40 on the motor pump unit, making the motor pump unit an independent functional unit with a water circuit control function. In addition, the control switch 50 is installed on the motor assembly, making the motor pump unit also an independent functional unit with a control circuit.

[0043] Please refer to Figure 3-7 The motor assembly 20 includes a motor 21, a pinion 22, and a motor bracket 23. The pinion 22 is mounted on the output shaft of the motor 21, and the motor bracket 23 is fixed to the housing end face of the motor 21 near the output end by screws.

[0044] Furthermore, the motor bracket 23 is cylindrical, and its side near the motor 21 is provided with a motor mounting stop 23a, motor mounting screw holes 23b, a positioning pin 23c, and a support column 23d. The motor mounting stop 23a is used for positioning and mounting the motor 21. The motor mounting screw holes 23b are located on both radial sides of the motor mounting stop 23a. The motor bracket 23 is fixed to the outer end face of the output end of the motor 21 by the cooperation of the motor mounting screw holes 23b and screws. The positioning pin 23c and the support column 23d are located at the bottom of the motor bracket 23 and are used for positioning and mounting the control switch 50. The control switch 50 has pin holes of corresponding position and size. The control switch 50 is positioned on the motor bracket 23 by the cooperation of the pin holes and the positioning pin 23c. The control switch 50 is firmly fixed to the motor bracket 23 by the support column 23d abutting against the side of the control switch 50. During testing, the control switch 50 can be guaranteed to function even when not connected to the housing 10. It won't fall off;

[0045] Furthermore, the motor bracket 23, on the side away from the motor 21, is provided with a pump mounting stop 23e, a pinion through hole 23f, a small bearing chamber 23g, a grease baffle 23h, and a pump mounting screw hole 23i. The pump mounting stop 23e is used to position the pump assembly 30 for installation. The pinion through hole 23f is located inside the pump mounting stop 23e and communicates with the motor mounting stop 23a, used to house the pinion 22. The small bearing chamber 23g is also located inside the pump mounting stop 23e, below the pinion through hole 23f, and concentrically positioned with the pump mounting stop 23e, used to house the small bearing 37. The grease baffle 23h surrounds the small bearing chamber 23g to reduce grease splashing and facilitate gear lubrication. The pump mounting screw hole 23i surrounds the outer ring of the motor bracket 23 and engages with screws to fix the motor bracket 23 to the pump assembly 30.

[0046] Please refer to Figure 3-4 and Figure 8-10 The pump assembly 30 includes a pump body 31, a left pump cover 32, and a right pump cover 33. The upper and lower ends of the pump body 31, the left pump cover 32, and the right pump cover 33 are provided with screw mounting holes 31a. The pump body 31, the left pump cover 32, and the right pump cover 33 are fixed together by screw mounting holes 31a, screws, and nuts.

[0047] Furthermore, the pump body 31 is provided with an installation part 31b, a large bearing chamber 31c, a drive chamber 31d, a plunger hole 31e, a water inlet channel 31f, a water inlet check valve branch 31g, a water outlet check valve branch 31h, a water outlet channel 31i, a water outlet port 31j, and a baffle 31k.

[0048] Specifically, the mounting part 31b is located on the pump body 31 near the motor bracket 23. Therefore, the mounting part 31b is a hollow cylinder. A large gear 34, which meshes internally with the small gear 22, is fixed on the inner wall of the mounting part 31b. Similarly, the mounting part 31b also has a motor bracket mounting stop 31b1 for positioning and mounting with the motor bracket 23. The outer periphery of the mounting part 31b also has motor bracket mounting screw holes 31b2 with the same position and size as the pump mounting screw holes 23i. After positioning, the motor bracket mounting screw holes 31b2 on the mounting part 31b engage with the pump mounting screw holes 23i on the motor bracket 23 and the screws, fixing the pump body 31 and the motor bracket 23 together. Because the large gear 34 and the small gear 22 mesh internally, the center distance between them and the motor 21 is small, reducing gear noise and resulting in a more compact overall structure. (Refer to rib 31k) Figure 3The rib 31k is protruding from the bottom of the pump body 31 and is set along the length of the pump body 31. The trigger 40 is provided with a groove 41. When the trigger 40 moves up and down, it can be limited by the rib 31k and will not fall off in the front and back direction, which facilitates the testing of the motor pump unit.

[0049] Specifically, the large bearing chamber 31c, the drive bearing chamber 31d, the plunger hole 31e, and the middle part of the mounting part 31b are sequentially connected. The large bearing chamber 31c, the drive chamber 31d, and the plunger hole 31e are sequentially distributed from the mounting part 31b to the other side of the pump body 31. The large bearing chamber 31c and the drive chamber 31d are arranged along the length of the pump body 31, and the plunger hole 31e is arranged along the width of the pump body 31. The large bearing chamber 31c is used to house the large bearing 35, the drive chamber 31d is used to house the drive bearing 36, and the plunger hole 31e is used to house the plunger 39. The small bearing 37, the large bearing 35, and the drive bearing 36 are all arranged around the gear shaft 38. One end of the gear shaft 38 is connected to the motor bracket 23, and the other end is connected to the plunger 39 (see Figure 1). Figure 4 Driven by the motor assembly 20, the large gear 34, and the small gear 22, the plunger 39 reciprocates.

[0050] Specifically, the water inlet channel 31f, the water inlet check valve branch 31g, the water outlet check valve branch 31h, the water outlet channel 31i, and the water outlet port 31j are all interconnected. The water inlet channel 31f is connected to the water inlet valve assembly 60. Under the reciprocating motion of the plunger 39, water is transmitted through the water inlet valve assembly 60 to the water inlet check valve branch 31g and the water outlet check valve branch 31h, and then through the water outlet channel 31i to the water outlet port 31j. The water outlet port 31j is connected to one end of the water outlet pipe 100, and the other end of the water outlet pipe 100 is connected to the nozzle assembly 70. Finally, the water is sprayed out through the nozzle assembly 70.

[0051] Preferably, a pressure relief hole 31l is provided between the water inlet channel 31f and the water outlet channel 31i, and a safety valve core and spring are provided in the water inlet channel 31f (see reference). Figure 4 When the nozzle assembly 70 and the outlet pipe 100 are functioning normally, the push rod of the safety valve core extends out of the pressure relief hole 31l, cutting off the passage of the pressure relief hole 31l. When the nozzle assembly 70 is blocked, the water pressure between the inlet channel 31f and the outlet channel 31i is too high. At this time, the water pressure can cause the push rod of the safety valve core to disengage from the pressure relief hole 31l, and water can enter the inlet channel 31f from the pressure relief hole 31l and flow out from the inlet valve assembly 60. This setting can prevent damage to the cleaning machine.

[0052] Specifically, the left pump cover 32 and the right pump cover 33 have the same structure, each equipped with an inlet check valve hole 32a, an outlet check valve hole 32b, and a water seal mounting cavity 32c. The inlet check valve hole 32a communicates with the inlet check valve branch 31g, the outlet check valve hole 32b communicates with the outlet check valve branch 31h, and the water seal mounting cavity 32c is connected to the plunger hole 31e. A connecting hole 32d is also provided between the inlet check valve hole 32a and the outlet check valve hole 32b, allowing water to flow between the inlet check valve branch 31g and the outlet check valve branch 31h.

[0053] Preferably, please refer to Figure 3 The left pump cover 32 and the right pump cover 33 are also provided with reinforcing ring ribs 32e extending towards the center of the pump body 31 around the screw mounting holes 31a to ensure the installation strength of the screw mounting holes 31a.

[0054] Please refer to Figure 1-4 and Figure 11-12 The inlet valve assembly 60 includes an inlet valve body 61, an inlet valve core 62, and a quick connector 63. The top of the inlet valve body 61 is connected to the inlet channel 31f on the pump body 31, which can be achieved through a pin, hook, or other means. A small sealing ring 69 is also provided between the top of the inlet valve body 61 and the inlet channel 31f on the pump body 31 to enhance the sealing between the inlet valve body 61 and the pump body 31. The bottom of the inlet valve body 61 is connected to the quick connector 63, which is connected to the water source through the inlet pipe assembly 80. The inlet valve core 62 is installed inside the inlet valve body 61. Under the action of the trigger 40, the inlet valve core 62 can control whether water enters the pump body 31 through the inlet valve body 61.

[0055] Specifically, a fixing arm 61a is provided on the side of the inlet valve body 61 near the motor assembly 20. The fixing arm 61a has a fixing hole 61a1 and a support column 61a2. The trigger 40 has a mounting hole 42. The trigger 40 is rotatably mounted on the fixing arm 61a through the cooperation of the mounting hole 42 and the support column 61a2, so that the opening and closing of the inlet valve assembly 60 can be controlled by moving the trigger 40, without needing to be assembled with the housing 10, which facilitates testing and assembly. The fixing hole 61a1 can cooperate with the screw mounting holes 31a at the lower end of the pump body 31, the left pump cover 32, and the right pump cover 33 to fix the lower end of the pump body 31, the left pump cover 32, and the right pump cover 33 to the fixing arm 61a of the inlet valve body 61, so that the inlet valve assembly 60 is directly connected to the motor pump unit.

[0056] It should be noted that the trigger 40 can also be rotatably mounted on the pump body 31, that is, the support column 61a2 is set in a suitable position on the pump body 31, and the trigger 40 is also provided with a mounting hole 42. The trigger 40 is rotatably mounted on the pump body 31 through the cooperation of the mounting hole 42 and the support column 61a2.

[0057] Furthermore, the inlet valve body 61 has an inlet 61b, an outlet 61c, and a valve core push rod outlet 61d, with the three outlets interconnected. The inlet valve core 62 is located inside the inlet 61b, and the push rod of the inlet valve core 62 extends out of the valve core push rod outlet 61d and contacts the trigger 40. The inlet valve core 62 is controlled by the trigger 40 to open or close the water inlet channel of the pump body 31. There is a sealing step 61e and an O-ring chamber 61f between the inlet 61b and the valve core push rod outlet 61d. The inlet valve core 62 is provided with a large O-ring 64 and a small O-ring 65. Both the large O-ring 64 and the small O-ring 65 are located in the O-ring chamber 61f. Under the control of the inlet valve core 62 and the trigger 40, the large O-ring 64 contacts or moves away from the sealing step 61e, thereby controlling the opening or closing of the water valve.

[0058] Furthermore, a quick connector 63 is connected to the bottom end of the inlet valve body 61. A spring 67 and a large sealing ring 68 are also provided between the inlet valve core 62 and the quick connector 63. The spring 67 is used to reset the inlet valve core 62 after the trigger 40 pressure is released, and the large sealing ring 68 is used to enhance the sealing between the quick connector 63 and the inlet valve body 61. A filter screen 66 is installed inside the quick connector 63. The inner diameter of the top end of the quick connector 63 is small, and the inner diameter of the bottom end of the quick connector 63 is large. Water can pass through the filter screen 66 from the bottom end with the larger inner diameter and then enter the inlet valve body 61 from the top end with the smaller inner diameter, ensuring that the filtration area is large enough.

[0059] Please refer again. Figure 1-2 The bottom of the control switch 50 is provided with a contact 51, which is arranged along the front and back direction of the control switch 50. When the trigger 40 is pulled up, the trigger 40 contacts the contact 51, which can start the motor pump unit and connect the motor pump unit circuit, and also open the passage of the water inlet valve body 61. That is, the water circuit and the circuit can be controlled at the same time by using the trigger 40.

[0060] As described above, the handheld cleaning machine provided by this invention integrates the inlet valve assembly and trigger onto the motor pump unit, making the motor pump unit an independent functional unit with water circuit control. Furthermore, a control switch is installed on the motor assembly, giving the motor pump unit an independent functional unit with a control circuit. The advantages are: firstly, it facilitates testing during manufacturing without assembling the casing, avoiding additional costs associated with disassembling the casing in case of quality issues; secondly, this design makes all components more compact, allowing for a smaller casing design and eliminating the need for dimensional chaining between the casing and various mounting components, thus reducing dimensional control requirements and manufacturing costs; and thirdly, the internal meshing transmission structure further balances the contradictions of the large center distance between the external meshing pump and motor, and the complex and inefficient planetary gear transmission structure.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A hand-held cleaning machine characterized in that, The application relates to a water pump, which comprises a motor assembly (20), a pump assembly (30), a trigger (40), a water inlet valve assembly (60) and a water outlet pipe (100), the motor assembly (20) and the pump assembly (30) are connected to form a motor pump unit, the water outlet pipe (100) is detachably installed on the pump assembly (30) at a position away from the motor assembly (20), the water inlet valve assembly (60) comprises a water inlet valve body (61), the water inlet valve body (61) is provided with a fixing arm (61a), the pump assembly (30) is fixed above the water inlet valve assembly (60) by being connected with the fixing arm (61a), and the trigger (40) is rotatably installed at one end of the fixing arm (61a) and used for controlling the on-off of a water channel. The motor assembly (20) comprises a motor (21), a pinion (22) and a motor support (23), the pinion (22) is installed on an output shaft of the motor (21), the motor support (23) is provided with a motor mounting stop (23a) and motor mounting screw holes (23b) on a side close to the motor (21), the motor mounting stop (23a) is used for positioning the motor (21), the motor mounting screw holes (23b) are arranged on the two sides of the motor mounting stop (23a) in the radial direction, and the motor support (23) is fixed on an end face of a shell of the motor (21) through cooperation of the motor mounting screw holes (23b) and screws. The motor support (23) is provided with a positioning pin (23c) and a supporting column (23d), and a control switch (50) is fixed on the motor support (23) through the positioning pin (23c) and the supporting column (23d).

2. The hand-carried cleaning machine of claim 1, wherein, The pump assembly (30) comprises a large gear (34), one side of the motor support (23) is connected with the motor assembly (20), the other side of the motor support (23) is connected with the pump assembly (30), and the pinion (22) is internally meshed with the large gear (34) through the motor support (23).

3. The hand-carried cleaning machine of claim 1, wherein, The control switch (50) is fixed on the motor assembly (20) and used for controlling the on-off of a circuit.

4. The hand-carried cleaning machine of claim 1, wherein, The positioning pin (23c) and the supporting column (23d) are arranged on the side of the motor support (23) close to the motor (21), the control switch (50) is provided with a pin hole corresponding to the positioning pin (23c), and the control switch (50) is fixed on the motor support (23) through cooperation of the pin hole and the positioning pin (23c) and through abutting of the supporting column (23d) and a side surface of the control switch (50).

5. The hand-carried cleaning machine of claim 2, wherein, The motor support (23) is provided with a pump mounting stop (23e) and a pump mounting screw hole (23i) on the side away from the motor (21), the pump mounting stop (23e) is used for positioning the pump assembly (30), the pump mounting screw hole (23i) is arranged around the outer circle of the motor support (23), the pump assembly (30) comprises a pump body (31), the pump body (31) is provided with a mounting portion (31b) at one end close to the motor support (23), the mounting portion (31b) is hollow in the middle, the large gear (34) is arranged on the inner wall of the mounting portion (31b), the mounting portion (31b) is provided with a motor support mounting stop (31b1) corresponding to the pump mounting stop (23e), the motor support mounting stop (31b1) is used for positioning the motor support (23), the outer periphery of the mounting portion (31b) is provided with a motor support mounting screw hole (31b2) corresponding to the pump mounting screw hole (23i), the motor support (23) is positioned with the pump body (31) through the cooperation of the pump mounting stop (23e) and the motor support mounting stop (31b1), and then the motor support (23) is fixed with the pump body (31) through the cooperation of the motor support mounting screw hole (31b2), the pump mounting screw hole (23i) and a screw.

6. The hand-carried cleaning machine of claim 5, wherein, The motor support (23) is further provided with a pinion gear through hole (23f) and a small bearing chamber (23g) on the side away from the motor (21), the pinion gear through hole (23f) and the small bearing chamber (23g) are arranged inside the pump mounting stop (23e), the pinion gear (22) is engaged with the large gear (34) by penetrating the pinion gear through hole (23f), the small bearing chamber (23g) is located below the pinion gear through hole (23f) and is arranged concentrically with the pump mounting stop (23e), and the small bearing chamber (23g) is used for placing a small bearing (37).

7. The hand-carried cleaning machine of claim 6, wherein, The motor support (23) is further provided with a grease blocking rib (23h) on the side away from the motor (21), and the grease blocking rib (23h) is arranged around the small bearing chamber (23g).

8. The hand-carried cleaning machine of claim 6, wherein, The pump body (31) is provided with a large bearing chamber (31c), a driving cavity (31d) and a plunger hole (31e), the large bearing chamber (31c), the driving cavity (31d), the plunger hole (31e) and the middle part of the mounting part (31b) are sequentially communicated, and the large bearing chamber (31c), the driving cavity (31d) and the plunger hole (31e) are sequentially distributed from the mounting part (31b) to the side of the pump body (31) away from the mounting part (31b), the large bearing chamber (31c) and the driving cavity (31d) are arranged along the length direction of the pump body (31), the plunger hole (31e) is arranged along the width direction of the pump body (31), the large bearing chamber (31c) is used for placing a large bearing (35), the driving cavity (31d) is used for placing a driving bearing (36), and the plunger hole (31e) is used for placing a plunger (39), the small bearing (37), the large bearing (35) and the driving bearing (36) are all arranged around a gear shaft (38), one end of the gear shaft (38) is connected with the motor support (23), the other end is connected with the plunger (39), and under the driving of the motor assembly (20), the large gear (34) and the small gear (22), the plunger (39) reciprocates.

9. The hand-carried cleaning machine of claim 8, wherein, The pump body (31) is further provided with a water inlet channel (31f), a water inlet one-way valve branch (31g), a water outlet one-way valve branch (31h) and a water outlet channel (31i), the water inlet channel (31f) is connected with the water inlet valve assembly (60), one end of the water outlet channel (31i) is provided with a water outlet port (31j), the water outlet port (31j) is connected with the water outlet pipe (100), and the water inlet one-way valve branch (31g) and the water outlet one-way valve branch (31h) are both arranged along the width direction of the pump body (31), when the plunger (39) reciprocates, water passes through the water inlet one-way valve branch (31g), the water outlet one-way valve branch (31h), the water outlet channel (31i) and the water outlet port (31j) in sequence and is sprayed from the water outlet pipe (100).

10. The hand-carried cleaning machine of claim 9, wherein, The water inlet channel (31f) and the water outlet channel (31i) are further provided with a pressure relief small hole (31l), the water inlet channel (31f) is internally provided with a safety valve spool and a spring, under the condition that the water pressure in the water outlet pipe (100) is normal, the top rod of the safety valve spool extends out of the pressure relief small hole (31l), the pressure relief small hole (31l) is not communicated, and under the condition that the water pressure in the water outlet pipe (100) is abnormal, the top rod of the safety valve spool is separated from the pressure relief small hole (31l) under the water pressure, and water can be discharged from the pressure relief small hole (31l) through the water inlet channel (31f).

11. The hand-carried cleaning machine of claim 9, wherein, The pump assembly (30) further comprises a left pump cover (32) and a right pump cover (33), the upper and lower ends of the pump body (31), the left pump cover (32) and the right pump cover (33) are provided with screw mounting holes (31a), and the pump body (31), the left pump cover (32) and the right pump cover (33) are fixed together through cooperation of the screw mounting holes (31a), screws and nuts.

12. The hand-carried cleaning machine of claim 11, wherein, The left pump cover (32) and the right pump cover (33) are provided with a water inlet check valve hole (32a), a water outlet check valve hole (32b) and a water seal installation cavity (32c), the water inlet check valve hole (32a) is communicated with the water inlet check valve branch (31g), the water outlet check valve hole (32b) is communicated with the water outlet check valve branch (31h), the water seal installation cavity (32c) is connected with the plunger hole (31e), and a communication hole (32d) is arranged between the water inlet check valve hole (32a) and the water outlet check valve hole (32b), and water can flow between the water inlet check valve branch (31g) and the water outlet check valve branch (31h) through the communication hole (32d).

13. The hand-carried cleaning machine of claim 11, wherein, The left pump cover (32) and the right pump cover (33) are further provided with a reinforcing ring (32e) extending to the center of the pump body (31) around the screw mounting hole (31a), and the reinforcing ring (32e) is used for strengthening the mounting strength of the screw mounting hole (31a).

14. The hand-carried cleaning machine of claim 12, wherein, The water inlet valve assembly (60) further comprises a water inlet valve core (62) and a quick connector (63), the top of the water inlet valve body (61) is connected with the water inlet channel (31f) on the pump body (31), a small sealing ring (69) is further arranged between the top of the water inlet valve body (61) and the water inlet channel (31f) on the pump body (31), the bottom of the water inlet valve body (61) is connected with the quick connector (63), the water inlet valve core (62) is installed in the water inlet valve body (61), and the water inlet valve core (62) can control whether water enters the inside of the pump body (31) through the water inlet valve body (61) under the driving of the trigger (40).

15. The hand-carried cleaning machine of claim 14, wherein, The fixing arm (61a) is arranged on one side of the water inlet valve body (61) close to the motor assembly (20), the fixing arm (61a) is provided with a fixing hole (61a1) and a support column (61a2), the trigger (40) is provided with a mounting hole (42), the trigger (40) is rotatably installed on the fixing arm (61a) through cooperation of the mounting hole (42) and the support column (61a2), and the fixing hole (61a1) is matched with the screw mounting hole (31a) at the lower end of the pump body (31), the left pump cover (32) and the right pump cover (33), so that the lower end of the pump body (31), the left pump cover (32) and the right pump cover (33) are fixed together with the fixing arm (61a) on the water inlet valve body (61).

16. The hand-carried cleaning machine of claim 15, wherein, The inside of the water inlet valve body (61) is provided with a water inlet (61b), a water outlet (61c), and a valve core top rod outlet (61d) in communication with each other. The water inlet valve core (62) is arranged in the water inlet (61b), and the top rod of the water inlet valve core (62) extends out of the valve core top rod outlet (61d) to contact the trigger (40). The trigger (40) controls the opening or closing of the water inlet passage of the pump body (31). There is a sealing step (61e) and an O-ring chamber (61f) between the water inlet (61b) and the valve core top rod outlet (61d). The water inlet valve core (62) is provided with a large O-ring (64) and a small O-ring (65). The large O-ring (64) and the small O-ring (65) are located in the O-ring chamber (61f). The large O-ring (64) is in contact with or away from the sealing step (61e) under the control of the water inlet valve core (62) and the trigger (40), thereby controlling the opening or closing of the water valve.

17. The hand-carried cleaning machine of claim 16, wherein, The water inlet valve core (62) and the quick connector (63) are further provided with a spring (67) and a large sealing ring (68). The spring (67) is used to reset the water inlet valve core (62) after the pressure of the trigger (40) is removed. The large sealing ring (68) is used to enhance the sealing between the quick connector (63) and the water inlet valve body (61). The inside of the quick connector (63) is provided with a filter screen (66), and the inner diameter of the top end of the quick connector (63) is smaller than that of the bottom end.

18. The hand-carried cleaning machine of claim 3, wherein, The control switch (50) is provided with a contact (51). When the trigger (40) is pulled upwards, the trigger (40) contacts the contact (51), and the motor pump unit circuit is in communication.

19. The hand-carried cleaning machine of claim 1, wherein, It also includes a housing (10), a gun head assembly (70), a water inlet pipe assembly (80), a battery pack (90), the motor assembly (20), the pump assembly (30), the trigger (40), the control switch (50), the water inlet valve assembly (60), and the water outlet pipe (100) are located in the inside of the housing (10). The battery pack (90) is located at the tail of the housing (10) and is electrically connected with the motor assembly (20). The water inlet pipe assembly (80) is located at the bottom of the housing (10) and is connected with the water inlet valve assembly (60). The gun head assembly (70) is located at the head of the housing (10) and is connected with the pump assembly (30) away from the motor assembly (20) through the water outlet pipe (100).

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