Quick coupling device and high-pressure washer

Abstract

The utility model relates to a kind of quick connecting device and high-pressure cleaning machine, the quick connecting device includes gun seat, the spray head subassembly connected to gun seat, button and the elastic member of biasing button installed in gun seat, gun seat includes base body, the accommodation groove recessed from the outer circumferential surface of base body and the movable slot along radial direction through base body, movable slot is communicated in accommodation groove, button includes the press portion being located in accommodation groove, the clamping portion extending along radial direction from the end side of press portion and the opening along axial direction through clamping portion, clamping portion extends into movable slot, elastic member is along radial direction and abuts between accommodation groove and press portion, spray head subassembly includes the joint of insertion to base body and the clamping slot recessed along radial direction from the outer circumferential of joint, joint is along axial direction and is arranged in opening, clamping portion is held in clamping slot. By designing a new type of quick connecting device, the quick disassembly of spray head subassembly and gun seat can be realized.

Description

[Technical Field]

[0001] This utility model relates to the field of power tool technology, and in particular to a quick-connect device and a high-pressure washer having the quick-connect device. [Background Technology]

[0002] High-pressure washers are widely used for cleaning vehicles, yards, and floors. Their working principle is generally that the motor assembly drives the plunger to reciprocate in the pump body, so that the low-pressure water flow entering from the inlet pipe is transformed into a high-pressure water flow in the pump body and then sprayed out from the outlet pipe to achieve the purpose of rinsing.

[0003] To achieve better cleaning results and spray different types of high-pressure water jets, nozzle assemblies are often installed at the front end of the outlet pipe. However, the interfaces of existing nozzle assemblies and their connections to high-pressure washers are mostly non-quick-release designs, requiring tools for installation and removal, making operation very inconvenient, especially when multiple nozzle assemblies need to be used for cleaning, making replacement even more troublesome. Furthermore, the sealing performance of existing nozzle assemblies is not ideal.

[0004] Furthermore, in existing high-pressure washers, the nozzle assembly includes a nozzle housing connected to the main body of the high-pressure washer and a nozzle rotatably connected to the nozzle housing. The nozzle housing has a gripping area for the user to hold. If the user wants to switch between different types of nozzles, one hand needs to hold the nozzle housing to restrict the movement of the nozzle assembly relative to the high-pressure washer, while the other hand rotates the nozzle to switch between different water flow types. In existing nozzle assemblies, the nozzle has a large cross-section, while the nozzle housing has a small cross-section. There is a drop at the connection point between the nozzle housing and the nozzle without a transition structure. When the user holds the nozzle housing, their hand directly rests on the end face of the nozzle, resulting in low comfort and a poor user experience.

[0005] Therefore, it is indeed necessary to provide an improved quick-connect device and high-pressure cleaner to overcome the shortcomings of the existing technology. [Utility Model Content]

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a quick connection device and a high-pressure cleaner that can be quickly assembled and disassembled.

[0007] The present invention solves the existing technical problems by adopting the following technical solution: A quick connection device for a high-pressure washer includes a gun base, a nozzle assembly connected to the gun base, a button installed on the gun base, and an elastic element biasing the button. The gun base includes a base, a receiving groove recessed from the outer peripheral surface of the base, and a movable groove extending radially through the base. The movable groove communicates with the receiving groove. The button includes a pressing part disposed in the receiving groove, a retaining part extending radially from the end side of the pressing part, and an opening extending axially through the retaining part. The retaining part extends into the movable groove. The elastic element abuts radially between the receiving groove and the pressing part. The nozzle assembly includes a connector inserted into the base and a retaining groove recessed radially from the outer peripheral surface of the connector. The connector extends axially through the opening, and the retaining part is fixed in the retaining groove.

[0008] A further improvement is as follows: the gun base includes a support column protruding from the bottom wall of the receiving groove, one end of the elastic member is sleeved on the support column; the pressing part has a recessed slot on the side facing the support column, and the other end of the elastic member is disposed in the slot.

[0009] A further improvement is as follows: the nozzle assembly includes a positioning block protruding from the outer periphery of the connector, and the end face of the substrate facing the nozzle assembly is recessed with a positioning opening, and the positioning block is accommodated in the positioning opening.

[0010] A further improvement is that the positioning port is adjacent to the receiving groove, and the positioning port and the receiving groove are located on both sides of the movable groove.

[0011] A further improvement is as follows: the nozzle assembly includes a grip portion connected to the connector and a nozzle connected to the grip portion. The grip portion has a first region connected to the connector and a second region connected to the end of the first region. The second region has a larger cross-sectional area than the first region.

[0012] A further improvement is that the second region has a transition region extending downward from the end side of the first region, and the transition region and the positioning block are located on both sides of the axis of the nozzle assembly.

[0013] A further improvement is as follows: the button includes a pair of locking arms disposed on the locking part, and the pair of locking arms and the pressing part are located on both sides of the opening.

[0014] A further improvement is as follows: the nozzle assembly includes a seal installed in the connector and a plug that limits the seal; the inner wall of the connector has a stepped surface, and the seal abuts against the stepped surface.

[0015] The present invention can also solve the existing technical problems by adopting the following technical solutions: a high-pressure cleaner, including the quick connection device as described in any of the above.

[0016] A further improvement is as follows: the high-pressure cleaner includes a housing and a drive assembly disposed within the housing, the gun holder is connected to the front side of the housing, and the pressing part is disposed on the upper side of the gun holder.

[0017] Compared with the prior art, this utility model has the following advantages: By designing a novel quick-connect device, the nozzle assembly and gun holder can be quickly assembled and disassembled. In addition, when the pipe is inserted into the water flow channel, the sealing element is fitted around the outer circumference of the pipe to seal the water flow; and one side of the sealing element is limited by the stepped surface, while the other side is limited by the plug, making the sealing element less prone to aging and its positioning more reliable. [Image Description]

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-pressure cleaner of this utility model;

[0019] Figure 2 yes Figure 1 The diagram shows an exploded view of the nozzle assembly and housing in a high-pressure washer.

[0020] Figure 3 yes Figure 1 An exploded view of the quick-connect device in the high-pressure washer shown.

[0021] Figure 4 yes Figure 3 A cross-sectional view of the quick-connect device shown;

[0022] Figure 5 yes Figure 1 A schematic diagram of the nozzle assembly in the high-pressure washer at the first angle;

[0023] Figure 6 yes Figure 1 The diagram shows a second angle of the nozzle assembly in a high-pressure washer.

[0024] Figure 7 yes Figure 1 The diagram shows the structure of the nozzle assembly in the high-pressure washer from the third angle.

[0025] Figure 8 yes Figure 1 The diagram shows the structure of the nozzle assembly in the high-pressure washer from the fourth angle.

[0026] Figure 9 yes Figure 1 The diagram shows the fifth angle of the nozzle assembly in the high-pressure washer. [Detailed Implementation]

[0027] The specific embodiments of this utility model / utility invention will be further described in detail below with reference to the accompanying drawings.

[0028] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. For example, terms such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0029] Please see Figure 1 and Figure 2 As shown, an embodiment of this utility model relates to a high-pressure washer 100, including a housing 1, a drive assembly (not shown) disposed within the housing 1, a gun holder 2 disposed on the front side of the housing 1, a nozzle assembly 3 connected to the front side of the gun holder 2, and a battery pack 200 detachably mounted on the housing 1, the battery pack 200 being configured to power the drive assembly. Further, the drive assembly includes a motor assembly and a pump assembly mounted within the housing 1, a transmission assembly connecting the motor assembly and the pump assembly, and an inlet 10 and an outlet 20 fluidly communicating with the pump assembly. The transmission assembly has a plunger that reciprocates within the housing 1, the plunger extending into the pump body of the pump assembly and pressurizing the external water flow entering from the inlet 10, which is then sprayed outward from the outlet 20.

[0030] In this embodiment, the water outlet 20 is formed on the front side of the gun base 2, and the water flowing out of the water outlet 20 enters the nozzle assembly 3.

[0031] Furthermore, the aforementioned housing 1 includes a main body 11 housing the drive assembly and a handle 12 connected to the lower side of the main body, with the battery pack 200 mounted at the lower end of the handle. The high-pressure washer 100 also includes a switch assembly 6 mounted on the handle 12, which is electrically connected to the motor assembly and configured to control the on / off state of the motor assembly. Preferably, the motor assembly is an external rotor brushless motor.

[0032] Please combine Figure 3 and Figure 4As shown, in this embodiment, the nozzle assembly 3 and the gun base 2 are connected by a quick-connect device. Specifically, the quick-connect device includes a button 4 mounted on the gun base 2 and an elastic element 5 for biasing the button 4. The gun base 2 includes a base 21, a receiving groove 22 recessed from the outer peripheral surface of the base 21, a movable groove 23 extending radially through the base 21, and a support 24 protruding from the bottom wall of the receiving groove 22. Correspondingly, the button 4 includes a pressing part 41 disposed in the receiving groove 22, a retaining part 42 extending radially downward from the end side of the pressing part 41, and an opening 43 extending axially through the retaining part 42. Correspondingly, the nozzle assembly 3 includes a connector 31 inserted into the base 21 and a retaining groove 32 recessed radially from the outer peripheral surface of the connector 31. The connector 31 extends axially through the opening 43 and into the inner cavity of the gun base 2.

[0033] Furthermore, the aforementioned movable groove 23 is connected to the receiving groove 22, so that while the pressing part 41 of the button 4 is located in the receiving groove 22, the holding part 42 can extend downward into the movable groove 23. The pressing part 41 and the holding part 42 are integrally constructed, which is simple and reliable.

[0034] In this embodiment, the elastic member 5 abuts radially between the receiving groove 22 and the pressing part 41. Specifically, one end of the elastic member 5 is sleeved on the support column 24; a notch 411 is recessed on the side of the pressing part 41 facing the support column 24, and the other end of the elastic member 5 is disposed within the notch 411. Furthermore, the quick-connect device has a locked state in which the nozzle assembly 3 is fixedly installed to the gun base 2 and an unlocked state in which the nozzle assembly 3 is decoupled from the gun base 2. The elastic member 5 moves in the up-down direction, thereby switching between the locked state and the unlocked state.

[0035] In this embodiment, the elastic element 5 is a spring.

[0036] The working principle of the quick-connect device in this embodiment is as follows: Button 4 is installed on the gun base 2, and button 4 can move up and down relative to the gun base 2. Under the action of the elastic element 5, button 4 always has an upward tendency; the shape of the connector 31 of the nozzle assembly 3 matches the shape of the inner cavity of the gun base 2, and the two have the same or similar contour structure, so that when the connector 31 is inserted into the inner cavity of the gun base 2, the nozzle assembly 3 can only move in the back-and-forth direction. (See reference...) Figure 4As shown, in the locked state, the retaining part 42 of button 4 is fixed in the slot 32 of nozzle assembly 3. At the same time, under the action of elastic member 5, the movement of nozzle assembly 3 in the front-back direction is also limited, thus ensuring that nozzle assembly 3 cannot be dislodged from gun base 2. To switch from the locked state to the unlocked state, it is necessary to overcome the elastic force of elastic member 5 and press down the pressing part 41 of button 4, which will drive the retaining part 42 and opening 43 to move downward synchronously. At this time, the retaining part 42 disengages from the slot 32, and the connector 31 passes through the opening 43 and can move freely in the front-back direction.

[0037] This invention designs a novel quick-connect device that enables the rapid assembly and disassembly of the nozzle assembly 3 and the gun holder 2.

[0038] Please see Figure 3 As shown, the button 4 also includes a pair of locking arms 44 disposed on the locking part 42. The pair of locking arms 44 and the pressing part 41 are located on the upper and lower sides of the opening 43. The lower end of the locking arm 44 is connected to the locking part 42, and the upper end of the locking arm 44 extends upward from the lower end and is separated from the locking part 42. After the button 4 is installed on the gun base 2, the upper end of the locking arm 44 abuts against the gun base 2, so that the button 4 cannot be disengaged from the upper and lower parts of the gun base 2.

[0039] In this embodiment, the pressing part 41 is located on the upper side of the gun base 2, making it more convenient for the user to assemble and disassemble the nozzle assembly 3.

[0040] Please see Figure 3 and Figure 4 As shown, the above-mentioned nozzle assembly 3 includes a positioning block 33 protruding from the outer periphery of the connector 31. The end face of the base 21 facing the nozzle assembly 3 is recessed with a positioning port 211. The positioning block 33 is accommodated in the positioning port 211 so as to achieve precise positioning of the nozzle assembly 3 and the gun base 2 during installation.

[0041] Furthermore, the positioning port 211 is adjacent to the receiving slot 22, and the positioning port 211 and the receiving slot 22 are located on both sides of the movable slot 23.

[0042] In this embodiment, the nozzle assembly 3 further includes a sealing element 38 and a plug 39 for limiting the sealing element 38, both installed within the connector 31. The inner wall of the connector 31 has a stepped surface 311, and the sealing element 38 abuts against the stepped surface 311. When the pipe is inserted into the water flow channel S, the sealing element 38 is fitted around the outer periphery of the pipe to achieve a seal on the water flow. Furthermore, one side of the sealing element 38 is limited by the stepped surface 311, while the other side is limited by the plug 39. This prevents the sealing element 38 from aging and ensures more reliable positioning.

[0043] In this embodiment, the sealing element 38 is an O-ring.

[0044] Please see Figures 5 to 9 As shown, the above-mentioned nozzle assembly 3 includes a grip portion 34 connected to the connector 31 and a nozzle 35 connected to the grip portion 34. The front end face of the nozzle 35 has multiple nozzles 351 of different types. The nozzle 35 is rotatably connected to the grip portion 34, and when the user rotates the nozzle 35, he will select one nozzle 351 to spray water outward.

[0045] In this embodiment, the grip portion 34 has a first region 341 connected to the connector 31 and a second region 342 connected to the end of the first region 341. The second region 342 is connected to the nozzle 35 and is located between the first region 341 and the nozzle 35. In the front-rear direction, the length L1 of the first region 341 is greater than the length L2 of the second region 342. The outer surface of the grip portion 34 is designed for user gripping. Specifically, the first region 341 is a main gripping portion for the user's palm, and the second region 342 is an auxiliary gripping portion for the user's hand to abut against. Furthermore, the first region 341 and the second region 342 are integrally formed, and the outer surface of the second region 342 has a continuous smooth curved surface. In this application, the second region 342 serves as a transitional connection between the first region 341 and the nozzle 35, and as an auxiliary gripping part for the user's hand to contact. By designing the outer surface of the second region 342 as a continuous and smooth curved surface, the user's grip is more comfortable and the experience is better, while the appearance of the nozzle assembly 3 is more aesthetically pleasing.

[0046] Please see Figure 7 As shown, the aforementioned curved surface includes a convex surface 3423 and / or a concave surface 3424, which are configured for contact by the user's hand.

[0047] Preferably, the curved surface includes both a convex surface 3423 and a concave surface 3424, with the surface area of ​​the convex surface 3423 being larger than that of the concave surface 3423. The user's hand is more comfortable in contact with the convex surface 3423; therefore, the convex surface 3423 is used as the primary contact surface, while the concave surface 3423 is used as an auxiliary contact surface. Furthermore, the concave surface 3423 can be configured to conform to the shape of the user's fingers, further enhancing grip comfort.

[0048] In this embodiment, the first region 341 and the second region 342 are integrally formed, and the gripping part 34 is formed by injection molding to create the first region 341 and the second region 342.

[0049] Furthermore, the second region 342 has a larger cross-sectional area than the first region 341, and the second region 342 has a transition region 3421 extending downward from the front end of the first region 341. The transition region 3421 gradually narrows from the front to the rear, that is, the cross-sectional area of ​​the transition region 3421 gradually decreases from the front to the rear. The upper rear end of the transition region 3421 is connected to the lower front end of the first region 341. The junction of the transition region 3421 and the first region 341 is a continuous and smooth curved surface, making it more comfortable for the user to hold.

[0050] Furthermore, the cross-sectional area of ​​the first region 341 gradually increases from the front to the rear, and the first region 341 is shaped like a trumpet.

[0051] In this embodiment, the transition region 3421 and the positioning block 33 are located on both sides of the axis of the nozzle assembly 3.

[0052] In this embodiment, the upper ends of the second region 342 and the first region 341 are located in the same plane. Since the user's palm contacts the upper side of the grip 34 when holding the grip, setting the upper ends of the second region 342 and the first region 341 in the same plane helps to improve the comfort of holding the grip.

[0053] Please see Figure 6 As shown, the second region 342 includes a material reduction hole 3422 recessed from the outer surface, and the material reduction hole 3422 is at least partially located within the transition region 3421. By providing the material reduction hole 3422, on the one hand, the manufacturing cost of the nozzle assembly 3 can be reduced; on the other hand, in terms of process, the material reduction hole 3422 can reduce shrinkage, making the overall wall thickness of the grip 34 more uniform and the appearance more aesthetically pleasing.

[0054] In this embodiment, the connection between the material reduction hole 3422 and the second region 342 is a rounded transition, so as not to affect the user's grip comfort.

[0055] Please see Figure 5 , Figure 8 and Figure 9As shown, the grip portion 34 has a parting line 348. The outer surface of the grip portion 34 includes an arc-shaped segment and a straight segment 345 connected to the arc-shaped segment. The straight segment 345 extends between the connector 31 and the nozzle 35, and the parting line 348 is disposed on the straight segment 345. Since the grip portion 34 is formed by injection molding, the injection molding process results in the formation of a parting line 348 on the outer surface of the grip portion 34. The parting line is a burr formed on the outer surface of the grip portion 34, and the presence of the parting line causes an unpleasant feeling of discomfort when the user grips the grip portion 34. However, this application flattens the area where the parting line 348 is located and forms a straight segment 345. Since the overall outer periphery of the grip portion 34 is arc-shaped, the straight segment 345 is concave relative to the virtual outer circumference of the arc-shaped segment, so that the user does not come into contact with the parting line 348 when gripping, resulting in a comfortable grip and a good feel.

[0056] In this embodiment, the straight segment 345 is arranged symmetrically about the parting line 348; further, the straight segment 345 extends in the first region 341 and the second region 342.

[0057] Furthermore, the parting line 348 has an upper parting line 3481 disposed on the upper side of the grip portion 34 and a lower parting line 3482 disposed on the lower side of the grip portion 34. The upper parting line 3481 and the lower parting line 3482 together form a parting surface, and the grip portion 34 is symmetrically arranged about the parting surface.

[0058] Furthermore, the aforementioned straight section 345 includes an upper straight section 3451 disposed on the upper side of the grip portion 34 and a lower straight section 3452 disposed on the lower side of the grip portion 34. The upper parting line 3481 is disposed on the upper straight section 3451, and the lower parting line 3482 is disposed on the lower straight section 3452. Both the upper straight section 3451 and the lower straight section 3452 are symmetrically arranged about the parting surface.

[0059] Please see Figure 9 As shown, the lower straight section 3452 includes recessed finger grooves 3453, and there are multiple finger grooves 3453, which are spaced apart along the front-back direction. The shape of the finger grooves 3453 is designed to fit the shape of the user's fingers so that the user can grip more securely.

[0060] Please combine Figure 5 As shown, the aforementioned arc segment includes a first arc segment 343 connected to one side of the straight segment 345 and a second arc segment 344 connected to the other side of the straight segment 345. The first arc segment 343 and the second arc segment 344 are arranged symmetrically about the parting plane.

[0061] In this embodiment, either the first arc segment 343 or the second arc segment 344 includes a vertical rib 346 extending circumferentially and a horizontal rib 347 extending in the front-rear direction, with the vertical rib 346 and the horizontal rib 347 arranged alternately. Please refer to... Figure 6 As shown, multiple vertical ribs 346 are spaced apart along the front-to-back direction, and a material reduction groove 349 is formed between two adjacent vertical ribs 346. The material reduction groove 349 is consistent with the material reduction hole 3422, which also has the effects of low manufacturing cost and more uniform overall wall thickness of the gripping part 34, and more beautiful appearance.

[0062] In this embodiment, the width of the straight section 345 is greater than the width of the vertical rib 346, and the width of the straight section 345 is greater than the width of the horizontal rib 347. By making the straight section 345 wider than the vertical rib 346 and the horizontal rib 347, the user's hand has a larger contact area, making the grip more comfortable.

[0063] This utility model is not limited to the specific embodiments described above. Those skilled in the art will readily understand that many other alternatives exist for the quick-connect device and high-pressure washer of this utility model without departing from its principles and scope. The scope of protection of this utility model is defined by the claims.

Claims

1. A quick-connect device for a high-pressure washer, comprising a gun holder, a nozzle assembly connected to the gun holder, a button mounted on the gun holder, and an elastic element biasing the button; characterized in that: The gun base includes a base, a receiving groove recessed from the outer peripheral surface of the base, and a movable groove extending radially through the base. The movable groove communicates with the receiving groove. The button includes a pressing part disposed in the receiving groove, a retaining part extending radially from the end side of the pressing part, and an opening extending axially through the retaining part. The retaining part extends into the movable groove. The elastic element abuts radially between the receiving groove and the pressing part. The nozzle assembly includes a connector inserted into the base and a retaining groove recessed radially from the outer peripheral surface of the connector. The connector passes axially through the opening, and the retaining part is fixed in the retaining groove.

2. The quick connection device according to claim 1, characterized in that: The gun mount includes a support column protruding from the bottom wall of the receiving groove, and one end of the elastic member is sleeved on the support column; the pressing part has a recessed slot on the side facing the support column, and the other end of the elastic member is disposed in the slot.

3. The quick connection device according to claim 1, characterized in that: The nozzle assembly includes a positioning block protruding from the outer periphery of the connector, and the end face of the substrate facing the nozzle assembly is recessed with a positioning opening, the positioning block being accommodated within the positioning opening.

4. The quick connection device according to claim 3, characterized in that: The positioning port is adjacent to the receiving slot, and the positioning port and the receiving slot are located on opposite sides of the movable slot.

5. The quick connection device according to claim 3, characterized in that: The nozzle assembly includes a grip portion connected to the connector and a nozzle connected to the grip portion. The grip portion has a first region connected to the connector and a second region connected to an end of the first region, the second region having a larger cross-sectional area than the first region.

6. The quick connection device according to claim 5, characterized in that: The second region has a transition region extending downward from the end side of the first region, and the transition region and the positioning block are located on both sides of the axis of the nozzle assembly.

7. The quick connection device according to claim 1, characterized in that: The button includes a pair of locking arms disposed on the locking portion, and the pair of locking arms and the pressing portion are located on both sides of the opening.

8. The quick connection device according to claim 1, characterized in that: The nozzle assembly includes a seal installed in the connector and a plug that limits the seal. The inner wall of the connector has a stepped surface, and the seal abuts against the stepped surface.

9. A high-pressure cleaner, characterized in that: Includes the quick-connect device according to any one of claims 1-8.

10. The high-pressure cleaner according to claim 9, characterized in that: The high-pressure washer includes a housing and a drive assembly disposed within the housing. The gun holder is connected to the front side of the housing, and the pressing part is disposed on the upper side of the gun holder.

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