WO2020019676A1

WO2020019676A1 - Pump assembly and high-pressure cleaner

Info

Publication number: WO2020019676A1
Application number: PCT/CN2018/125177
Authority: WO
Inventors: 陈浩; 余刚
Original assignee: 苏州小科清洁科技有限公司
Priority date: 2018-07-24
Filing date: 2018-12-29
Publication date: 2020-01-30
Also published as: CN108678924A; JP2020016238A

Abstract

Provided is a pump assembly (100) and a high-pressure cleaner, wherein the pump assembly comprises: a first cavity (110); a crank cavity (121) and a plunger cavity (122) communicated with each other, wherein the plunger cavity communicates with the first cavity; a third cavity (130), a check valve (140) is each provided between the first cavity and the plunger cavity and between the third cavity and the plunger cavity so as to be conducted or blocked; a plunger (150), the plunger being provided in the plunger cavity; and a crank link mechanism (160) provided in the crank cavity and connected to the plunger. The pump assembly is compact in structure, uniform in bearing and large in bearing capacity.

Description

Pump components and high-pressure cleaners

This application claims priority from a Chinese patent application with a filing date of July 24, 2018 and application number 201810819738.9, the entire contents of which are incorporated herein by reference.

Technical field

The present disclosure relates to the field of cleaning technology, for example, to a pump assembly and a high-pressure cleaner.

Background technique

A high pressure washer is a machine that uses a power unit to drive a plunger pump to generate pressure water to rinse the surface of an object. It can peel off and wash away dirt to achieve the purpose of cleaning the surface of an object. Compared with the manual cleaning method, the high-pressure cleaner reduces water consumption, saves a lot of time, and has a better cleaning effect. Nowadays, the application of high-pressure cleaners is becoming more and more extensive, and it is widely used in cleaning life areas such as cars, courtyards, roads and fences. The washing machine on the market has the following defects: the washing machine does not have a self-priming function, which results in limited use. It needs to connect an external water source or tap water with a pressure input. The washing machine does not have a separate water inlet structure and needs to be connected to a nearby water source to work. ; The washing machine is moved by a single handle or wheel structure, the storage structure is large, and the space is large; the washing machine is an integral structure, the water storage device (bucket) and the body are permanently combined, and the washing machine cannot be separated. The overall space occupied is large, and it is not convenient to store and place. Due to the large volume of the washing machine, users are not very convenient to move when using a high-pressure washing machine, and they cannot find a good focus position, which is more laborious to move.

For a handheld high-pressure cleaner that can be separated from the water storage device, a crank-link plunger mechanism is usually used. The crank-link plunger mechanism converts the rotary motion of the motor into the linear motion of the plunger. The crank needs to withstand a large force. In the related technology, the crank-rod plunger mechanism is divided into a unilaterally supported crank and a double-sided integrated crank. The unilateral-supported crank has a small support force, which limits the maximum pressure and flow of the machine; the double-sided support The integral crank is difficult to process, and the installed housing needs to be disassembled, and the structure is not compact. In addition, the connecting position of the connecting rod and the plunger is generally located at the tail of the plunger. This is to facilitate processing and easy installation, but it also brings problems. The transmission structure is not compact enough, the lateral force is large, and the plunger is severely biased, affecting efficiency. At the same time, in related technologies, the connecting method of connecting rod pins can usually only be designed as a semi-floating type, which causes serious friction of the connecting rod pins and affects the life and stability.

For the plunger, in the related art, the domestic high-pressure washer generally uses a solid plunger, but for a handheld domestic high-pressure washer, the weight of such a plunger is too large, which will significantly increase the user's hand-held weight; When the plunger is driven by the mechanism, the solid plunger has a large inertia force due to the heavy weight, which will cause obvious vibration of the entire machine.

Summary of the Invention

The present disclosure proposes a pump assembly and a high-pressure washer. The pump assembly has a compact structure, a uniform bearing capacity, and a large bearing capacity.

A pump assembly provided by an embodiment includes a first cavity and a second cavity. The second cavity includes a crank cavity and a plunger cavity which are communicated with each other. The crank cavity is integrally formed. The plunger cavity communicates with the first cavity; a third cavity, the third cavity is connected with the crank cavity and communicates with the plunger cavity; and is disposed between the first cavity and Between the plunger cavities and between the third cavity and the plunger cavities, and provided as a check valve for conducting or blocking; plunger, the plunger is disposed on the plunger The cavity is configured to drive the one-way valve to be turned on or off; and a crank linkage mechanism is disposed in the crank cavity and is connected to the plunger to drive the plunger in the cavity. The plunger cavity performs a linear reciprocating motion.

An embodiment also provides a high-pressure cleaner including the above-mentioned pump assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a high-pressure cleaner provided by an embodiment; FIG.

2 is a schematic diagram of an internal structure of a high-pressure cleaner provided by an embodiment;

3 is a schematic structural diagram of a pump assembly of the high-pressure cleaner;

Figure 4 is a side view of the pump assembly;

Figure 5 is a sectional view taken along line A-A of Figure 4;

6 is a schematic diagram of a connection structure of a crank link mechanism and a plunger in a pump assembly;

Figure 7 is a side view of Figure 6;

Figure 8 is a sectional view taken along line B-B of Figure 7;

9 is a schematic structural diagram of a first crank in a crank link mechanism;

10 is a schematic structural diagram of a second crank in a crank link mechanism;

11 is a schematic structural diagram of a link in a crank link mechanism;

12 is a schematic structural diagram of a transmission mechanism in the high-pressure cleaner;

13 is a side view of a connection structure of a motor and a pump assembly;

Fig. 14 is a sectional view taken along the line C-C in Fig. 13.

In the picture: 100-pump assembly, 110-first cavity, 120-second cavity, 121-crank cavity, 122-plunger cavity, 130-third cavity, 140-one-way valve, 150- Plunger, 151-tubular body, 152-wear layer, 153-guide, 154-plunger guide hole, 160-crank link mechanism, 161-first support bearing, 162-second support bearing, 163-section One crank, 1631-first crank body, 1632-first round table, 1633-first shaft hole, 164-second crank, 1641-second crank body, 1642-round table, 1643-second shaft hole, 1644-company Rod shaft, 1645-connecting column, 165- connecting rod bearing, 1651-rod, 1652-first shaft mounting portion, 1653-second shaft mounting portion, 200-housing, 201-handle portion, 202-switch, 300- Motor, 301-motor base, 302-thrust, 400-drive mechanism, 401-ring gear, 402-drive gear, 403-driven gear, 500-battery pack.

detailed description

As shown in FIG. 1 and FIG. 2, the high-pressure washer of this embodiment includes a housing 200 having a grip portion 201 for holding. The housing 200 is provided with a motor 300, a transmission mechanism 400 connected to the motor 300, and a transmission mechanism. A pump assembly 100 driven by 400; a battery pack 500 is installed on the handle part 201, and a push-type switch 202 is provided on the handle part 201, and the switch 202 is electrically connected to the battery pack 500. The high-pressure cleaning machine can be powered by AC or DC. The casing 200 does not have a water tank provided as a storage water source, and it can be connected to an external water source through a water pipe. It is small in size, light in weight, and easy to operate.

In one embodiment, the high-pressure cleaner is a handheld high-pressure cleaner.

The high-pressure cleaner is connected to an external water source through a water pipe, and the water is sprayed out by the pump assembly 100. In an embodiment, as shown in FIGS. 3 to 5, the pump assembly 100 includes a first cavity 110, a second cavity 120, a third cavity 130, a plunger 150, and a crank link mechanism 160. The body 120 includes a crank cavity 121 and a plunger cavity 122 communicating with each other. The crank cavity 121 is integrally formed, and the plunger cavity 122 communicates with the first cavity 110. The third cavity 130 is connected to the crank cavity 121 and is connected to the column. The plug cavity 122 is in communication, and a one-way valve 140 is provided between the first cavity 110 and the third cavity 130 and the plunger cavity 122 to be turned on or off; the plunger 150 is disposed in the plunger cavity. In 122, a check valve 140 is configured to be turned on or off; a crank link mechanism 160 is disposed in the crank cavity 121 and connected to the plunger 150, and the plunger 150 is driven to perform a linear reciprocating motion in the plunger cavity 122.

In one embodiment, the plunger 150 is integrally formed of a wear-resistant material.

The first cavity 110, the second cavity 120, and the third cavity 130 together form an L-shape, so that the volume of the pump assembly 100 is small. In order to further reduce the volume of the high-pressure washer, the third cavity 130, the second cavity 130, The cavity 120, the transmission mechanism 400, the motor 300 and the first cavity 110 together form a T-shaped structure.

As shown in FIG. 6 to FIG. 8, the crank link mechanism 160 in this embodiment is a two-sided support type. The crank link mechanism 160 includes a link bearing 165, two support bearings, two cranks, and a link shaft. 1644. The two support bearings are a first support bearing 161 and a second support bearing 162 opposite to each other; the two cranks are a first crank 163 and a second crank 164, respectively, and the first crank 163 is rotatably connected to the first support bearing 161. The second crank 164 is rotatably connected to the second support bearing 162, and the second crank 164 and the first crank 163 are connected through a connecting rod shaft 1644; the first end of the connecting rod bearing 165 is rotatably connected to the connecting rod shaft 1644, and the connecting rod bearing The second end of 165 is connected to the plunger 150. The use of two support bearings for double-sided support makes the supporting force of the crank link mechanism 160 larger, and the first crank 163 and the second crank 164 are assembled in an integrally formed crank cavity 121, which has a compact structure and integrity. Stronger, and when installing, only the first support bearing 161 and the first crank 163 are clamped on the first end of the crank cavity 121, and the second support bearing 162 and the second crank 164 are clamped on the crank cavity 121 On the second end, the bearing is uniform and the bearing capacity is large.

As shown in FIG. 9, the first crank 163 includes a first crank body 1631. A first circular table 1632 that is rotatably connected to the first support bearing 161 is vertically convex on a first side of the first crank body 1631 and concave on a second side. A first shaft hole 1633 is provided, and the axis of the first circular table 1632 is parallel to the axis of the first shaft hole 1633, and the first side and the second side are opposite sides.

As shown in FIG. 8 and FIG. 10, the second crank 164 includes a second crank body 1641, and a second circular table 1642 rotatably connected to the second support bearing 162 is vertically convex on a first side of the second crank body 1641. A second shaft hole 1643 coaxial with the second circular table 1642 is recessed on the second side of the crank body 1641. The eccentricity of the second circular table 1642 is connected to the first end of the link shaft 1644, and the second The end is connected to the first shaft hole 1633.

The connecting rod shaft 1644 and the second crank body 1641 may be integrally formed, or may be separate entities. When the connecting rod shaft 1644 and the second crank body 1641 are independent individuals, they are connected to each other; the connecting rod shaft 1644 and the first crank body 1631 may be integrally formed, or may be separate entities. When the connecting rod shaft 1644 and the first crank body 1631 are independent entities, they are connected to each other.

As shown in FIG. 8 and FIG. 11, the connecting rod bearing 165 has a rod portion 1651, a first end of the rod portion 1651 has a first shaft mounting portion 1652, a second end of the rod portion 1651 has a second shaft mounting portion 1653, The mounting portion 1652 is sleeved with the connecting rod shaft 1644, and the second shaft mounting portion 1653 is connected with the plunger 150.

In this embodiment, as shown in FIGS. 6 to 8, the plunger 150 includes a tubular body 151 made of plastic or aluminum alloy, a wear-resistant layer 152 sleeved on the outer wall of the tubular body 151, and the tubular body 151 is provided with A pin hole connected to the connecting rod bearing 165. In one embodiment, the material of the tubular body 151 is plastic, and the combination of plastic and abrasion resistant layer 152 is used to reduce the weight of the plunger while achieving the function of the plunger. The main structure of the plunger 150 is a plastic material, which has a low density and is easy to form a complex structure. The pin hole of the plunger 150 is designed on the tubular body 151. By providing a wear-resistant layer 152, it has high dimensional accuracy, low surface roughness and high hardness. The abrasion-resistant layer 152 is configured to cooperate with the water seal to seal the liquid. The wear-resistant layer 152 is a metal sleeve, which can be integrated with the tubular body 151 made of plastic, or the wear-resistant layer 152 can be assembled on the tubular body 151. Therefore, the plunger 150 is lightweight. When the crank link mechanism 160 is used to drive the plunger 150, the lightweight plunger 150 can significantly reduce the inertial force and avoid vibration of the high-pressure cleaner.

In an embodiment, a guide member 153 is sleeved on the outer wall of the wear-resistant layer 152. The inner wall of the guide member 153 has a plunger guide hole 154. The connecting position of the connecting rod bearing 165 and the plunger 150 is located at the guide member 153 and surrounds the plunger. Area of 150. The wear-resistant layer 152 forms sliding friction with the water seal and the plunger guide hole 154, which is more conducive to the reciprocating movement of the plunger 150.

In addition, the connecting position of the connecting rod bearing 165 and the plunger 150 is located in the area surrounding the plunger 150 by the guide 153. Compared to the end of the plunger 150, the structure is more compact. This reduces the size and weight of the small portable washing machine. Very helpful; at the same time, the connecting position of the connecting rod bearing 165 is located in the area where the guide member 153 surrounds the plunger 150. In the same space, a longer connecting rod bearing 165 can be designed. Relatively speaking, the angle between the connecting rod bearing 165 and the plunger 150 will be smaller, the lateral force will be smaller, the partial friction of the plunger 150 will be weakened, and the mechanical efficiency will be improved.

The connection manner between the pin on the second shaft mounting portion 1653 of the connecting rod bearing 165 and the pin hole on the plunger 150 may be a full floating type or a semi-floating type. When the pin connection method is full-floating, the inner wall of the plunger guide hole 154 provides a limit for the full-floating connection pin; and when the pin connection method is full-floating, the pin can be avoided from abrading and the service life can be increased.

In order to enable the pump assembly 100 to suck and discharge liquid, as shown in FIGS. 12 to 14, the transmission mechanism 400 of this embodiment includes a ring gear 401, a driving gear 402, and three driven gears 403. The two cavities 120 are connected, and the inner ring of the ring gear 401 is provided with teeth that mesh with three driven gears 403; the three driven gears 403 are rotatably connected to the side of the second crank body 1641 provided with the second shaft hole 1643 And three driven gears 403 are enclosed inside the ring gear 401; the driving gear 402 is drivingly connected to the output shaft of the motor 300, and the driving gear 402 is meshed with the three driven gears 403. And the side of the second crank body 1641 provided with the second shaft hole 1643 is provided with three connection posts 1645 which are rotatably connected with the three driven gears 403, and the motor base 301 of the motor 300 is provided with one and three connection posts 1645. The abutting thrust piece 302 and the length of the connecting post 1645 are greater than the width of the driven gear 403. In this way, when the motor 300 is transmitting, the connecting post 1645 and the thrust member 302 can be used to prevent the axial movement of the transmission mechanism 400. The transmission mechanism 400 has a compact structure, a small volume, and a good transmission effect, which is beneficial to the miniaturization of the high-pressure cleaner.

In summary, the pump assembly and the high-pressure cleaner of this embodiment have a compact structure, a small volume, a uniform load and a large load capacity.

Claims

A pump assembly including:

First cavity (110);

A second cavity (120), the second cavity (120) comprising a crank cavity (121) and a plunger cavity (122), the crank cavity (121) being integrally formed, and the column The plug cavity (122) communicates with the first cavity (110);

A third cavity (130), the third cavity (130) is connected to the crank cavity (121) and communicates with the plunger cavity (122);

It is arranged between the first cavity (110) and the plunger cavity (122) and between the third cavity (130) and the plunger cavity (122), and is arranged as a guide Check valve (140) on or off;

A plunger (150) provided in the plunger cavity (122) and configured to drive the check valve (140) to be turned on or off; and

A crank link mechanism (160), the crank link mechanism (160) is disposed in the crank cavity (121) and connected with the plunger (150) to drive the plunger (150) at A linear reciprocating motion is performed in the plunger cavity (122).
The pump assembly according to claim 1, wherein the crank link mechanism (160) includes a link bearing (165), two support bearings, two cranks, and a link shaft (1644), wherein two units The support bearings are a first support bearing (161) and a second support bearing (162), which are oppositely disposed;

The two cranks are a first crank (163) and a second crank (164), the first crank (163) is rotatably connected to the first support bearing (161), and the second crank (164) Rotatably connected with the second support bearing (162), and the second crank (164) and the first crank (163) are connected through the link shaft (1644);

A first end of the connecting rod bearing (165) is rotatably connected to the connecting rod shaft (1644), and a second end of the connecting rod bearing (165) is connected to the plunger (150).
The pump assembly according to claim 2, wherein the first crank (163) includes a first crank body (1631), and a first side of the first crank body (1631) is vertically convexly provided with the first crank body (1631). The first support bearing (161) is a first circular table (1632) connected by rotation, a first shaft hole (1633) is recessed on the second side of the first crank body (1631), and the first circular table (1632) ) Is parallel to the axis of the first shaft hole (1633), and the first side and the second side are opposite to each other.
The pump assembly according to claim 3, wherein the second crank (164) includes a second crank body (1641), and is perpendicularly protruded on a first side of the second crank body (1641) and communicates with the first side of the second crank body (1641). A second circular table (1642) rotatably connected to the second support bearing (162), wherein a second side of the second crank body (1641) is concavely provided with a coaxial with the second circular table (1642). A second shaft hole (1643), an eccentric portion of the second circular table (1642) is connected to a first end of the link shaft (1644), and a second end of the link shaft (1644) is connected to the first A shaft hole (1633) is connected.
The pump assembly according to claim 4, wherein the connecting rod bearing (165) includes a rod portion (1651), a first end of the rod portion (1651) has a first shaft mounting portion (1652), and The second end of the rod portion (1651) has a second shaft mounting portion (1653), the first shaft mounting portion (1652) is sleeved with the link shaft (1644), and the second shaft mounting portion (1653) ) Is connected to the plunger (150).
The pump assembly according to claim 2, wherein the plunger (150) comprises a tubular body (151) made of a plastic material or an aluminum alloy, and a wear-resistant layer (5) sleeved on an outer wall of the tubular body (151). 152), the tubular body (151) is provided with a pin hole connected with the connecting rod bearing (165).
The pump assembly according to claim 6, wherein the plunger (150) further comprises a guide member (153) sleeved on an outer wall of the wear layer (152), and an inner side of the guide member (153) The wall has a plunger guide hole (154), and the connecting position of the connecting rod bearing (165) and the plunger (150) is located in a region where the guide (153) surrounds the plunger (150).
A high-pressure cleaner comprising a pump assembly (100) according to any one of claims 1-7.
The high-pressure cleaner according to claim 8, further comprising:

The housing (200) includes a handle portion (201) and a push switch (202) provided on the handle portion (201);

A motor (300) disposed in the casing (200);

A transmission mechanism (400) disposed in the housing (200) and connected to the motor (300), wherein the pump assembly (100) is provided to be driven by the transmission mechanism (400); and

A battery pack (500), the battery pack (500) is mounted on the handle portion (201), and the switch (202) is electrically connected to the battery pack (500).
The high-pressure cleaner according to claim 9, wherein the transmission mechanism (400) comprises a ring gear (401), a driving gear (402), and three driven gears (403), wherein:

The ring gear (401) is connected to the crank cavity (121), and an inner ring of the ring gear (401) is provided with tooth portions that mesh with three of the driven gears (403);

Three of the driven gears (403) are rotatably connected to a crank link mechanism (160), and the three of the driven gears (403) are enclosed inside the ring gear (401);

The driving gear (402) is drivingly connected to the output shaft of the motor (300), and the driving gear (402) is meshed with three of the driven gears (403).
The high-pressure washer according to claim 10, wherein the crank link mechanism (160) is provided with three connecting columns (1645) rotatably connected to the three driven gears (403), and the motor (300) includes a motor base (301), the motor base (301) includes a thrust piece (302) that abuts three of the connecting posts (1645), and the connecting post (1645) is longer than the The width of the driven gear (403).