Labor-saving high-pressure gun

Abstract

The utility model relates to the technical field of high-pressure guns, in particular to a labor-saving high-pressure gun which comprises a valve mechanism, the valve mechanism comprises a gun valve sleeve, a valve assembly, a cam and an ejector rod sleeve, the gun valve sleeve comprises a valve body and a hinge body, the valve body is provided with a water inlet, a water outlet and a valve hole, and the valve assembly is arranged in the valve body. The valve assembly can penetrate through the valve hole to be exposed out of the valve body, the cam is provided with a first hinge point and a second hinge point, the first hinge point is connected with the hinge body in a relatively rotating mode through a first fastener, the ejector rod sleeve is fixedly connected with the valve assembly exposed out of the valve body, and the ejector rod sleeve is attached to the surface of the cam. Rotation of the cam can drive the ejector rod sleeve to move, and the ejector rod sleeve drives the valve assembly to move and controls communication of a water inlet channel and a water outlet channel in the valve body. The high-pressure water gun solves the technical problems that an operator needs to keep large hand-holding trigger force for a long time in the whole high-pressure spraying process, and the operator with small hand-holding force cannot normally use the high-pressure water gun.

Description

TECHNICAL FIELD

[0001] The utility model relates to high pressure gun technical field, concretely relates to a labor-saving high pressure gun. BACKGROUND

[0002] The high pressure water gun is used for washing snow and sludge and other environmental cleaning work besides fire extinguishing, the water pressure of the high pressure water gun is as high as 60 MPa or above, the traditional high pressure water gun opens the top rod by lever torque amplification principle, the valve is opened to let water out when the force of the hand-held trigger is greater than the resultant force of the water pressure of the water inlet and the spring force of the gun valve, the traditional high pressure water gun has the following shortcomings: on the one hand, the pressure of the high pressure water is very large, especially at the moment of opening the gun, the cleaning machine is in the pressure maintaining state, the pressure of the high pressure water is larger, and the force acting on the ball is larger, the operator needs to exert a large hand force on the trigger to make the ball overcome the water pressure of the water inlet and the spring force of the gun valve to be pushed open, which is very laborious, and even the operator with small hand force cannot normally use the water gun, on the other hand, the hand force of the operator holding the trigger is the resultant force of the water pressure of the water inlet and the spring force of the gun valve during the whole process of high pressure spraying by using the high pressure water gun, the larger the water pressure of the water inlet of the high pressure water gun, the larger the hand force of the operator holding the trigger, and it is easy to be tired for long time use, the experience of the customer to the high pressure cleaning machine is affected, and there is a hidden danger in use, therefore, it is necessary to design a labor-saving high pressure water gun under high pressure. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a labor-saving high pressure water gun to solve the technical problem that the operator needs to keep a large hand force on the trigger for a long time to overcome the resultant force of the water pressure of the water inlet and the spring force of the gun valve during the whole process of high pressure spraying by using the high pressure water gun, and the hand force of the operator needs to be changed all the time due to the influence of the change of the water inlet pressure, and even the operator with small hand force cannot normally use the high pressure water gun.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The utility model provides a labor-saving high pressure water gun, including valve mechanism, the valve mechanism includes gun valve cover, valve assembly, cam and top rod cover, the gun valve cover includes valve body and hinged body, the valve body is provided with water inlet, water outlet and valve hole, the valve assembly is arranged in the valve body, the valve assembly can be exposed outside the valve body through the valve hole, the cam is provided with first hinged point and second hinged point, the first hinged point is rotatably connected with the hinged body through first fastener, the top rod cover is fixedly connected with the valve assembly exposed outside the valve body, the top rod cover is attached to the surface of the cam, the rotation of the cam can drive the top rod cover to move, and the top rod cover drives the valve assembly to move and controls the communication of the water inlet and the water outlet passage on the valve body.

[0006] Further, the cam is elliptical or approximately elliptical, the first and second hinge points are on the long axis of the cam, and the cam can rotate about the first hinge point. The first hinge point is always in line with the resultant force direction of the valve assembly, and when the first and second hinge points are in line with the resultant force direction of the valve assembly, the communication of the inlet and outlet passages on the valve body is completely open.

[0007] In some technical solutions of the present application, the hinge body comprises a hinge end and a hinge groove, the first hinge point is connected to the hinge end in a rotatable manner by a first fastener, and the top rod sleeve is arranged in the hinge groove. Rotation of the cam can move the top rod sleeve in the hinge groove, and the top rod sleeve drives the valve assembly to move in the valve body.

[0008] In some technical solutions of the present application, the valve assembly comprises a top rod, a sealing ring, a ball seat, a ball, a gun valve elastic element and a stop screw. The ball seat is provided with a ball seat through hole and a ball groove, and the ball groove is connected to the ball. The sealing ring is mounted on the top rod, one end of the top rod is sleeved with the top rod sleeve, and the other end of the top rod passes through the valve hole and the ball seat through hole and is connected to the ball. The ball is connected to the gun valve elastic element, the gun valve elastic element is connected to the stop screw, the stop screw is provided with a screw hole, and the screw hole is communicated with the inlet.

[0009] The sealing ring prevents water in the valve body from overflowing outside the valve body.

[0010] In some technical solutions of the present application, one part of the top rod is outside the valve body and is sleeved with the top rod sleeve, another part of the top rod is sleeved into the sealing ring and is connected to the ball through the ball seat through hole, the ball is connected to the gun valve elastic element and is locked in the valve body together by the stop screw.

[0011] In some technical solutions of the present application, the top rod sleeve is a top rod cap or a roller assembly.

[0012] In some technical solutions of the present application, the top rod cap comprises a limiting block and a convex cap, the limiting block is connected to the convex cap, the limiting block is slidably connected to the hinge groove, and the convex cap is provided with a top rod groove. The top rod cap is sleeved on one end of the top rod through the top rod groove.

[0013] In some technical solutions of the present application, the roller assembly comprises a roller support, a bearing and a fifth fastener. The roller support further comprises a limiting block, a roller groove and a top rod groove. The limiting block is slidably connected to the hinge groove, the bearing is rotatably installed on the roller groove by the fifth fastener, and the roller assembly is sleeved on one end of the top rod through the top rod groove.

[0014] Further, the top rod sleeve is made of wear-resistant material, and specifically, the convex cap is made of wear-resistant material, which can be wear-resistant alloy. The wear-resistant material has high hardness, can effectively resist wear, prolong the service life of the material, has high strength, can withstand large pressure and impact force, and is not easy to break.

[0015] In some technical solutions of the utility model, the labor-saving high-pressure gun comprises a trigger mechanism, and the trigger mechanism is rotatably connected with the cam through a second fastener.

[0016] In some technical solutions of the utility model, the trigger mechanism comprises a connecting rod and a trigger, one end of the connecting rod is rotatably connected with the second hinge point through a second fastener, and the other end of the connecting rod is rotatably connected with the trigger through a third fastener.

[0017] The reset mechanism is used for enabling the high-pressure gun to change from the gun closing state to the gun opening state, the operator holds the trigger to rotate the trigger counterclockwise around the fourth fixing part, the connecting rod applies force to the second hinge point to drive the cam to rotate clockwise around the first hinge point, and at the same time, the top rod sleeve is pushed to move together with the top rod, at this time, the connection between the water inlet and the water outlet passages of the valve body is opened, and water starts to flow out.

[0018] In some technical solutions of the utility model, the labor-saving high-pressure gun comprises a reset mechanism, and the reset mechanism is connected with the trigger mechanism.

[0019] Further, the reset mechanism comprises a reset top rod and a reset elastic member, the reset top rod is connected with the trigger, and the reset elastic member is connected with the reset top rod.

[0020] The reset mechanism is used for enabling the high-pressure gun to change from the gun opening state to the gun closing state, the operator releases the handle, the reset spring and the reset top rod drive the trigger to rotate clockwise around the fourth fixing part to be unlocked, then under the action of the gun valve elastic member, the top rod and the ball move, the ball is tightly attached to the ball seat to close the connection between the water inlet and the water outlet passages of the valve body, and water stops flowing out.

[0021] In some technical solutions of the utility model, the labor-saving high-pressure gun further comprises a gun shell, the gun shell is provided with a mounting groove and a plurality of mounting holes, the reset mechanism is arranged in the mounting groove, and the valve mechanism and the trigger mechanism are fixed in the gun shell through the mounting holes.

[0022] In some technical solutions of the utility model, the gun shell comprises a gun barrel and a gun handle, the gun barrel is provided with a first mounting hole, a second mounting hole, a third mounting hole and a mounting groove, the first mounting hole is communicated with the water outlet, the second mounting hole is fixedly connected with the valve body, the third mounting hole is used for the trigger to pass through, the trigger is rotatably connected in the gun barrel through a fourth fastener, and the trigger and the gun handle are arranged at an included angle.

[0023] Further, the gun barrel is further provided with a front limiting column, and the gun handle is provided with a rear limiting column.

[0024] The front limit post is the maximum angle of the trigger and the gun handle opening, and the rear limit post is the minimum angle of the trigger and the gun handle opening, that is, the trigger is in the gun closing state at the front limit post, and the trigger is in the gun opening state at the rear limit post.

[0025] Further, the reset top rod has a protruding ring in the middle, the reset elastic element is sleeved into one end of the reset top rod and abuts against the protruding ring to be arranged in the mounting groove together, and the other end of the reset top rod can protrude out of the mounting groove and be connected with the trigger.

[0026] The protruding ring is used to make the reset top rod and the reset elastic element always be located in the mounting groove.

[0027] In some technical solutions of the utility model, the gun shell of the labor-saving high-pressure gun can be divided into a left gun shell and a right gun shell which are symmetrical to each other.

[0028] Further, the diameter of the top rod is not greater than the inner diameter of the ball seat through hole, the diameter of the ball is greater than the inner diameter of the ball seat through hole, and the diameter of the ball is less than the inner diameter of the valve body.

[0029] The ball can be in close contact with the ball seat to close the communication of the water inlet and outlet channels of the valve body, and the top rod pushes open the ball to separate the ball from the ball seat, thereby opening the communication of the water inlet and outlet channels of the valve body.

[0030] Further, the valve mechanism is made of rigid material, specifically, the ball and the ball seat are made of rigid material, that is, they can be steel balls or steel ball seats.

[0031] The rigid material can provide sufficient strength, rigidity and stability, so that the ball and the ball seat can resist water pressure and the elastic force of the gun valve elastic element, and ensure the long-term durability and safety of the ball and the ball seat.

[0032] Further, the first fastener and the second fastener are rigidly connected, which can be a pin.

[0033] The rigid connection can not only facilitate installation, but also ensure sufficient strength, rigidity and stability to withstand water pressure and the elastic force of the gun valve elastic element.

[0034] Further, the gun valve elastic element and the reset elastic element can be springs.

[0035] This utility model's labor-saving high-pressure gun utilizes the lever arm amplification principle to open the valve assembly, along with the cam and push rod sleeve design. This reduces the gripping force applied to the trigger by the operator during the process of opening the inlet and outlet channels on the valve body. Furthermore, after full opening, when the operator grips the trigger, the first hinge point of the cam, the second hinge point of the cam, and the reaction force of the opening valve (the resultant force of the inlet water pressure and the gun valve spring force) are aligned. At this point, the resultant force of the inlet water pressure and the gun valve spring force acts entirely on the first and second hinge points of the cam (rigid material and rigid connection). This process has the following advantages:

[0036] 1. The operator holds the trigger and pushes the cam to rotate. The cam drives the push rod cap downward to open the valve assembly. During this process, the cam and the push rod sleeve slide or roll with line contact friction, which is relatively small, making it easier to open the connection between the inlet and outlet channels on the valve body.

[0037] 2. The operator's grip force on the trigger is only enough to overcome the spring force of the return spring, which greatly reduces the amount of force required to grip the trigger, allowing even operators with relatively weak grip strength to easily use the high-pressure gun.

[0038] 3. The operator's grip strength is not affected by changes in the inlet pressure, thus saving effort and providing customers with a better experience. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the axial structure of the labor-saving high-pressure gun in the off state according to the first embodiment of this utility model;

[0040] Figure 2 for Figure 1 A schematic diagram of the axial structure of the labor-saving high-pressure gun in the firing state shown in the first embodiment;

[0041] Figure 3 This is a schematic diagram of the axial structure of the labor-saving high-pressure gun in the off state as shown in the second embodiment of this utility model;

[0042] Figure 4 This is a schematic diagram of the explosive structure of the labor-saving high-pressure gun shown in the first embodiment of this utility model;

[0043] Figure 5 This is a schematic diagram of the explosive structure of the labor-saving high-pressure gun shown in the second embodiment of the present invention;

[0044] Figure 6 A longitudinal cross-sectional structural diagram of the labor-saving high-pressure gun in the off state, provided for an embodiment of this utility model.

[0045] Figure 7 A longitudinal cross-sectional structural diagram of the labor-saving high-pressure gun in the firing state provided for the embodiment of this utility model;

[0046] Figure 8 For Figure 4 The schematic view of the shaft side structure of the middle top rod cap;

[0047] Figure 9 For Figure 5 The schematic view of the shaft side structure of the middle roller assembly;

[0048] Figure 10 For Figure 9 The schematic view of the explosion structure of the roller assembly;

[0049] In the figure, 1, valve mechanism, 11, gun valve sleeve, 111, valve body, 1111, water inlet, 1112, water outlet, 1113, valve hole, 112, hinged body, 1121, hinged end, 1122, hinged groove, 12, valve assembly, 121, top rod, 122, sealing ring, 123, ball seat, 124, ball, 125, gun valve elastic piece, 126, stop screw, 13, cam, 131, first hinged point, 132, second hinged point, 14, top rod sleeve, 14A, top rod cap, 14A-1, limiting block, 14A-2, convex cap, 14A-21, top rod groove, 14B, roller assembly, 14B-1, roller support, 14B-11, limiting block, 14B-12, roller groove, 14B-13, top rod groove, 14B-2, bearing, 14B-3, fifth fastener, 2, trigger mechanism, 21, connecting rod, 22, trigger, 3, reset mechanism, 31, reset top rod, 32, reset elastic piece, 4, gun shell, 41, gun barrel, 411, first mounting hole, 412, second mounting hole, 413, third mounting hole, 414, mounting groove, 42, gun handle, 43, left gun shell, 44, right gun shell. DETAILED DESCRIPTION

[0050] The utility model will be further described below in combination with the drawings and through specific embodiments, it should be pointed out that, for the ordinary skilled in the art, on the premise of not departing from the principle of the utility model, the modification of various equivalent forms of the invention falls within the scope defined by the claims of the application attached.

[0051] Unless the context clearly indicates otherwise, as used in the present specification, the terms "comprise", "comprising", specify the presence of a component, but do not exclude the presence or addition of one or more other components.

[0052] In the description of the present application, it needs to be understood that the terms "one end", "the other end", "upper", "lower", "inner side", "end", "between", "side", "side wall", "edge", "surface", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0053] In the description of the present application, it needs to be understood that the terms "one end", "the other end", "upper", "lower", "inner side", "end", "between", "side", "side wall", "edge", "surface", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0054] The labor-saving high-pressure gun can better solve the technical problems that the operator needs to keep a large hand trigger force for a long time to overcome the combined force of the water inlet water pressure and the gun valve spring force during the whole process of using the high-pressure water gun for high-pressure injection, and the operator's hand holding force needs to be changed at any time due to the influence of the change of the water inlet pressure, and even the operator with small hand holding force cannot normally use the high-pressure water gun.

[0055] The utility model provides a kind of high-pressure labor-saving water gun, refer to Figures 1 to 9 , the embodiment of the labor-saving high-pressure gun proposed by the utility model will be described in detail as follows.

[0056] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The utility model discloses a labor saving high pressure gun, including valve mechanism 1, trigger mechanism 2, reset mechanism 3 and gun shell 4. Be provided with mounting groove 414 and a plurality of mounting holes on gun shell 4, be provided with water inlet 1111 and water outlet 1112 on valve mechanism 1, and valve mechanism 1 is fixed in gun shell 4 through a mounting hole near water inlet 1111 one end, and the water outlet 1112 of valve mechanism 1 is communicated with a mounting hole on gun shell 4, and trigger mechanism 2 is installed in gun shell 4, and trigger mechanism 2 is rotatably connected with valve mechanism 1 through second fastener, and reset mechanism 3 is arranged in mounting groove 414, and reset mechanism 3 is connected with trigger mechanism 2. By holding gun shell 4 and exerting holding force on trigger mechanism 2, the communication of water inlet 1111 and water outlet 1112 on valve mechanism 1 is controlled, and reset mechanism 3 can make trigger mechanism 2 restore initial state after removing holding force.

[0057] Further, the gun shell 4 includes a barrel 41 and a handle 42, the barrel 41 is provided with a first mounting hole 411, a second mounting hole 412, a third mounting hole 413 and a mounting groove 414, the first mounting hole 411 is communicated with the water outlet 1112, the second mounting hole 412 is fixedly connected with the valve mechanism 1, the third mounting hole 413 is for the trigger mechanism 2 to pass through, the trigger mechanism 2 is rotatably connected in the barrel 41 through a fourth fastener, and the reset mechanism 3 is arranged in the mounting groove 414.

[0058] More specifically, the valve mechanism 1 comprises a gun valve sleeve 11, a valve assembly 12, a cam 13 and a top rod sleeve 14, the gun valve sleeve 11 comprises a valve body 111 and a hinged body 112, the valve body 111 is provided with a water inlet 1111, a water outlet 1112 and a valve hole 1113, the valve assembly 12 is arranged in the valve body 111 and can be exposed outside the valve body 111 through the valve hole 1113, the cam 13 is provided with a first hinged point 131 and a second hinged point 132, the first hinged point 131 is rotatably connected with the hinged body 112 through a first fastener, the top rod sleeve 14 is fixedly connected with the valve assembly 12 exposed outside the valve body 111, and the top rod sleeve 14 is surface-adhered with the cam 13. The trigger mechanism 2 comprises a connecting rod 21 and a trigger 22, one end of the connecting rod 21 is rotatably connected with the second hinged point 132 of the cam 13 through a second fastener, and the other end of the connecting rod 21 is rotatably connected with the trigger 22 through a third fastener. The valve body 111 is fixedly connected with the second mounting hole 412, the trigger 22 passes through the third mounting hole 413 and is rotatably connected in the gun barrel 41 through a fourth fastener, and the trigger 22 is arranged at an angle with the gun handle 42. The above-mentioned structure is arranged in a manner that facilitates the operator to hold the gun handle 42 and apply a holding force on the trigger 22 during the use of the high-pressure gun from the gun-off state to the gun-on state, the angle between the trigger 22 and the gun handle 42 gradually decreases, the trigger 22 rotates counterclockwise around the fixed point of the fourth fastener, then the connecting rod 21 acts on the second hinged point 132 through a lever force, so that the cam 13 rotates clockwise around the first hinged point 131, and the rotation of the cam 13 can drive the top rod sleeve 14 to move, the top rod sleeve 14 drives the valve assembly 12 to move in the valve body 111 and controls the communication of the water inlet 1111 and the water outlet 1112 on the valve body 111. The reset mechanism 3 comprises a reset top rod 31 and a reset elastic member 32, the reset top rod 31 has a ring of protrusions in the middle, the reset elastic member 32 is sleeved into one end of the reset top rod 31 and abuts against the protrusions to be arranged together in the mounting groove 414, and the other end of the reset top rod 31 can protrude out of the mounting groove 414 and be connected with the trigger 22. The protrusions are used to enable the reset top rod 31 and the reset elastic member 32 to be located in the mounting groove 414 at all times. During the use of the high-pressure gun from the gun-off state to the gun-on state, the angle between the trigger 22 and the gun handle 42 gradually decreases, the trigger 22 pushes the reset top rod 31 to compress the reset elastic member 32, the reset elastic member 32 accumulates elastic potential energy, and when the holding force is removed, the reset elastic member 32 releases the elastic potential energy to push the trigger 22 to rotate clockwise to the initial state, the connecting rod 21 drives the cam 13 to rotate counterclockwise, the valve assembly 12 pushes the top rod sleeve 14 to move, and the communication of the water inlet 1111 and the water outlet 1112 passages on the valve body 111 is closed.

[0059] As Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the hinge body 112 includes a hinge end 1121 and a hinge groove 1122, the first hinge point 131 is connected with the hinge end 1121 relatively rotatably by the first fastener, the top rod sleeve 14 is arranged in the hinge groove 1122, and the rotation of the cam 13 can move the top rod sleeve 14 in the hinge groove 1122, and the top rod sleeve 14 drives the valve assembly 12 to move in the valve body 111. The valve assembly 12 includes a top rod 121, a sealing ring 122, a ball seat 123, a ball 124, a gun valve elastic member 125 and a stop screw 126, the ball seat 123 is provided with a ball seat through hole and a ball groove, the ball groove is connected with the ball 124 in a matched mode, the ball seat 123 and the ball 124 are used for controlling the communication of the water inlet 1111 and the water outlet 1112 on the valve body 111, the ball 124 is tightly combined with the ball groove to close the communication of the water inlet 1111 and the water outlet 1112, the sealing ring 122 is installed on the top rod 121 to prevent liquid from flowing out of the valve body 111, one end of the top rod 121 is sleeved with the top rod sleeve 14, the other end of the top rod 121 passes through the valve hole 1113 and the ball seat through hole and is connected with the ball 124, the ball 124 is connected with the gun valve elastic member 125, the gun valve elastic member 125 is connected with the stop screw 126, the stop screw 126 is provided with a screw hole, and the screw hole is communicated with the water inlet 1111. A part of the top rod 121 is sleeved with the top rod sleeve 14 outside the valve body 111, another part of the top rod 121 is sleeved into the sealing ring 122 and passes through the ball seat through hole and the ball seat 123 and is connected with the ball 124, the ball 124 is connected with the gun valve elastic member 125 and is locked in the valve body 111 together through the stop screw 126, the gun valve elastic member 125 acts the elastic potential energy on the ball 124, then the ball 124 transmits the force to the top rod 121, and the top rod sleeve 14 sleeved on the end of the top rod 121 and the cam 13 always keep surface combination.

[0060] More specifically, when the high-pressure gun is used for operation, a force greater than the opening valve force (the sum of the gun valve spring and the water pressure of the water inlet 1111) from top to bottom pushes the top rod 121 to push open the ball 124, and the trigger mechanism 2 pushes the valve mechanism 1 from the gun closing state (for example Figure 5 ) to the gun opening state (for example Figure 6 ).

[0061] In the closed state, the open valve reaction force (the combined force of the water pressure of the inlet 1111 and the spring force of the gun valve) acting on the ball 124 is in the same straight line as the first hinge point 131 of the cam 13. At this time, the combined force of the water pressure of the inlet 1111 and the spring force of the gun valve is transmitted by the ball 124 and fully acts on the ball seat 123 (rigid material). The ball 124 pushes against the top rod 121, making the surface of the top rod sleeve 14 and the cam 13 tightly fit together. The gun valve elastic member 125 makes the ball 124 and the ball seat 123 tightly fit together. Under the dual action of the spring force of the gun valve elastic member 125 and the water pressure of the inlet 1111, the ball 124 completely pushes the ball seat 123, closing the communication between the inlet 1111 and the outlet 1112 of the valve body 111, and achieving the state of water gun sealing and no water.

[0062] In the open state, the open valve reaction force (the combined force of the water pressure of the inlet 1111 and the spring force of the gun valve) acting on the ball 124 is in the same straight line as the first hinge point 131 of the cam 13 and the second hinge point 132 of the cam 13. At this time, the combined force of the water pressure of the inlet 1111 and the spring force of the gun valve is transmitted by the ball 124 and fully acts on the first hinge point 131 of the cam 13 and the second hinge point 132 of the cam 13 (rigid connection). The top rod sleeve 14 and the cam 13 tightly fit together, the top rod 121 separates the ball 124 and the ball seat 123, the gun valve elastic member 125 accumulates elastic potential energy, and the communication between the inlet 1111 and the outlet 1112 of the valve body 111 is opened, achieving the state of smooth water flow of the water gun.

[0063] As shown in the first embodiment of Figure 1 , Figure 2 , Figure 4 and Figure 8 , the top rod sleeve 14 can be a top rod cap 14A. The top rod cap 14A includes a limiting block 14A-1 and a protruding cap 14A-2, which are connected and can be integrally formed. The limiting block 14A-1 is slidably connected with the hinge groove 1122, and the protruding cap 14A-2 is provided with a top rod groove 14A-21. The top rod cap 14A is sleeved on one end of the top rod 121 through the top rod groove 14A-21, and the limiting block 14A-1 is used to limit the rotation of the top rod cap 14A and prevent the top rod 121 from rotating in the valve body 111.

[0064] As shown in the first embodiment of Figure 3 , Figure 5 , Figure 9 and Figure 10In the second embodiment, the top rod sleeve 14 can be a roller assembly 14B, which includes a roller holder 14B-1, a bearing 14B-2 and a fifth fastener 14B-3. The roller holder 14B-1 further includes a limiting block 14B-11, a roller groove 14B-12 and a top rod groove 14B-13. The limiting block 14B-11 is slidably connected with the hinge groove 1122. The bearing 14B-2 is rotatably installed on the roller groove 14B-12 by the fifth fastener 14B-3. The roller assembly 14B is sleeved on one end of the top rod 121 through the top rod groove 14B-13. The limiting block 14B-11 is used to limit the rotation of the roller assembly 14B and prevent the top rod 121 from rotating in the valve body 111.

[0065] Compared with the top rod cap 14A in the first embodiment, the roller assembly 14B in the second embodiment changes the sliding friction between the cam 13 and the top rod cap 14A into rolling friction between the cam 13 and the roller assembly 14B when the cam 13 rotates, further reducing the force acting on the second hinge point 132 when the trigger mechanism 2 changes from the gun closing state (e.g. Figure 6 ) to the gun opening state (e.g. Figure 7 ).

[0066] Initial gun opening moment: At this stage, the valve mechanism 1 is in the closed state, the opening resistance is large, the trigger 22 is located on the front limiting column of the gun barrel 41, the front limiting column is the maximum angle of the trigger 22 and the opening of the gun handle 42, the trigger 22 can rotate counterclockwise around the fixed point of the fourth fastener, and then the lever force is applied to the second hinge point 132 through the connecting rod 21. The distance between the fixed point of the trigger 22 and the hinge point of the connecting rod 21 in the gun barrel 41 is much smaller than the distance between the fixed point of the trigger 22 and the force point of the trigger 22. With smaller opening force, the first hinge point 131 of the cam 13 can be rotated, and the purpose of labor saving can be achieved at the moment of gun opening.

[0067] Initial gun to the valve mechanism 1 fully open: the stage trigger 22 by the front limit column position on the barrel 41 to the rear limit column position on the handle 42 close, trigger 22 and handle 42 included angle gradually smaller, the rear limit column for trigger 22 and handle 42 open the smallest angle, trigger 22 around the fourth fastener fixed point counterclockwise rotation, and then through the connecting rod 21 by the lever force on the second hinge point 132, make the cam 13 clockwise rotation around the first hinge point 131, the rotation of the cam 13 can drive the top rod sleeve 14 movement, top rod sleeve 14 driven by the top rod 121 will open the ball 124 ball 124 slot, make the valve body 111 inlet 1111, screw hole, ball seat hole and water outlet 1112 gradually open the channel, top rod sleeve 14 is top rod cap 14A or roller assembly 14B, cam 13 rotation and top rod cap 14A for sliding friction, the friction is small, reduce the stage trigger 22 in the second hinge point 132 force, instead of roller assembly 14B, cam 13 rotation and roller assembly 14B for rolling friction, further reduce the stage trigger 22 in the second hinge point 132 force, is conducive to the realization of high pressure gun to open labor saving.

[0068] Valve mechanism 1 fully open stage: this stage trigger 22 is located on the rear limit column of the barrel 41, the valve body 111 inlet 1111, screw hole, ball seat hole and water outlet 1112 channel is fully open, inlet 1111 water pressure and gun valve spring force on the ball 124 and cam 13 first hinge point 131 and cam 13 second hinge point 132 in the same straight line, inlet 1111 water pressure and gun valve spring force by the ball 124 transmission completely on the cam 13 first hinge point 131 and cam 13 second hinge point 132 (rigid connection) on, hand need long time holding trigger 22 make trigger 22 keep in the rear block position on the handle 42, and then complete the cleaning work, at this time the holding force is only the reset spring on the trigger 22, so the hand will be very small force, with smaller force can hold, avoid long time holding make hand fatigue, hand holding more labor saving.

[0069] The utility model discloses a labor-saving high pressure gun utilizes lever force arm amplification principle to open the valve subassembly 12 and the setting of cam 13 and top rod cover 14, has reduced the holding force of the trigger 22 that operator applies in the through process of opening the water inlet 1111 and the water outlet 1112 channel of valve body 111, operator holds the trigger 22 and promotes cam 13 to rotate, and cam 13 drives top rod cover 14 to open valve subassembly 12 downwards, and this process cam 13 and top rod cover 14 are in line contact sliding friction or rolling friction, and the friction is smaller, makes the communication of opening the water inlet 1111 and the water outlet 1112 channel of valve body 111 more relaxed, in addition, after completely opening, when operator holds tightly trigger 22, the first hinged point 131 of cam 13, the second hinged point 132 of cam 13 and opening valve reaction force (the resultant force of water pressure of water inlet 1111 and gun valve spring elasticity) are on same straight line, at this moment, the resultant force of water pressure of water inlet 1111 and gun valve spring elasticity acts completely on the first hinged point 131 of cam 13 and the second hinged point 132 of cam 13 (rigid material and rigid connection), and the holding force of operator hand holds trigger is only the elasticity of reset spring, has alleviated the holding force of operator hand holds trigger greatly, lets the operator who holds the force relatively smaller also can use the high pressure gun easily, simultaneously, is not affected by the change of water inlet pressure size and is the holding force of operator, to reach the purpose of saving the labor, lets the customer have better experience.

Claims

1. A labor saving high pressure gun characterized by, The valve mechanism (1) comprises a gun valve sleeve (11), a valve assembly (12), a cam (13) and a ejector sleeve (14), the gun valve sleeve (11) comprises a valve body (111) and a hinge body (112), the valve body (111) is provided with a water inlet (1111), a water outlet (1112) and a valve hole (1113), the valve assembly (12) is arranged in the valve body (111), the valve assembly (12) can be exposed outside the valve body (111) through the valve hole (1113), the cam (13) is provided with a first hinge point (131) and a second hinge point (132), the first hinge point (131) is rotatably connected with the hinge body (112) through a first fastener, the ejector sleeve (14) is fixedly connected with the valve assembly (12) exposed outside the valve body (111), the ejector sleeve (14) is in surface contact with the cam (13), the rotation of the cam (13) can drive the movement of the ejector sleeve (14), the ejector sleeve (14) drives the movement of the valve assembly (12) and controls the communication of the water inlet (1111) and the water outlet (1112) on the valve body (111).

2. The power-assisted high-pressure gun according to claim 1, characterized in that The hinge body (112) comprises a hinge end (1121) and a hinge groove (1122), the first hinge point (131) is rotatably connected with the hinge end (1121) through a first fastener, the ejector sleeve (14) is arranged in the hinge groove (1122), the rotation of the cam (13) can drive the movement of the ejector sleeve (14) in the hinge groove (1122), and the ejector sleeve (14) drives the movement of the valve assembly (12) in the valve body (111).

3. The power saving high pressure gun of claim 2, wherein, The valve assembly (12) comprises an ejector rod (121), a sealing ring (122), a ball seat (123), a ball (124), a gun valve elastic element (125) and a stop screw (126), the ball seat (123) is provided with a ball seat through hole and a ball groove, the ball groove is connected with the ball (124) in a matched mode, the sealing ring (122) is mounted on the ejector rod (121), one end of the ejector rod (121) is sleeved with the ejector sleeve (14), the other end of the ejector rod (121) passes through the valve hole (1113) and the ball seat through hole and is connected with the ball (124), the ball (124) is connected with the gun valve elastic element (125), the gun valve elastic element (125) is connected with the stop screw (126), the stop screw (126) is provided with a screw hole, and the screw hole is communicated with the water inlet (1111).

4. The power-assisted high-pressure gun according to claim 3, characterized in that Part of the ejector rod (121) is outside the valve body (111) and is sleeved with the ejector sleeve (14), the other part of the ejector rod (121) is sleeved into the sealing ring (122) and is connected with the ball (124) through the ball seat (123) and the ball seat through hole, the ball (124) is connected with the gun valve elastic element (125) and is locked in the valve body (111) together through the stop screw (126).

5. The power saving high pressure gun of claim 4, wherein, The ejector sleeve (14) is an ejector cap (14A) or a roller assembly (14B).

6. The power-assisted high-pressure gun according to claim 5, characterized in that The top rod cap (14A) comprises a limiting block (14A-1) and a convex cap (14A-2), the limiting block (14A-1) and the convex cap (14A-2) are connected, the limiting block (14A-1) is relatively slidably connected with the hinge groove (1122), the convex cap (14A-2) is provided with a top rod groove (14A-21), and the top rod cap (14A) is sleeved on one end of the top rod (121) through the top rod groove (14A-21).

7. The power saving high pressure gun of claim 5, wherein, The roller assembly (14B) comprises a roller support (14B-1), a bearing (14B-2) and a fifth fastener (14B-3), the roller support (14B-1) further comprises a limiting block (14B-11), a roller groove (14B-12) and a top rod groove (14B-13), the limiting block (14B-11) is relatively slidably connected with the hinge groove (1122), the bearing (14B-2) is relatively rotatably installed on the roller groove (14B-12) through the fifth fastener (14B-3), and the roller assembly (14B) is sleeved on one end of the top rod (121) through the top rod groove (14B-12).

8. The power-saving high-pressure gun according to claim 1, characterized in that The trigger mechanism (2) is relatively rotatably connected with the cam (13) through a second fastener.

9. The power saving high pressure gun of claim 8, wherein, The trigger mechanism (2) comprises a connecting rod (21) and a trigger (22), one end of the connecting rod (21) is relatively rotatably connected with the second hinge point (132) through a second fastener, and the other end of the connecting rod (21) is relatively rotatably connected with the trigger (22) through a third fastener.

10. The power-saving high-pressure gun according to claim 1, characterized in that The reset mechanism (3) is connected with the trigger mechanism (2).

11. The power saving high pressure gun of claim 10, wherein, The reset mechanism (3) comprises a reset top rod (31) and a reset elastic member (32), the reset top rod (31) is connected with the trigger (22), and the reset elastic member (32) is connected with the reset top rod (31).

12. The power-saving high-pressure gun according to claim 1, characterized in that The gun shell (4) is provided with a mounting groove (414) and a plurality of mounting holes, the reset mechanism (3) is arranged in the mounting groove (414), and the valve mechanism (1) and the trigger mechanism (2) are fixed in the gun shell (4) through the mounting holes.

13. The power saving high pressure gun of claim 12, wherein, The gun shell (4) comprises a gun barrel (41) and a gun handle (42), the gun barrel (41) is provided with a first mounting hole (411), a second mounting hole (412), a third mounting hole (413) and a mounting groove (414), the first mounting hole (411) is communicated with the water outlet (1112), the second mounting hole (412) is fixedly connected with the valve body (111), the third mounting hole (413) is used for the trigger (22) to pass through, the trigger (22) is relatively rotatably connected in the gun barrel (41) through a fourth fastener, and the trigger (22) and the gun handle (42) are arranged at an included angle.

14. The power saving high pressure gun of claim 12, wherein, The reset top rod (31) has a convex ring in the middle, the reset elastic member (32) is sleeved into one end of the reset top rod (31) and abuts against the convex ring to be arranged in the mounting groove (414) together, and the other end of the reset top rod (31) can protrude out of the mounting groove (414) and be connected with the trigger (22).

15. The power saving high pressure gun of claim 13, wherein, The gun shell (4) can be divided into a left gun shell (43) and a right gun shell (44) which are symmetrical to each other.

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