A top rod device for cleaning machine microswitch

Abstract

The technical scheme belongs to the technical field of cleaning machine micro switch and specifically relates to a top rod device of a cleaning machine micro switch, which comprises a top rod and a push rod, the rear end of the top rod is movably connected with the front end of the push rod, and swinging of the top rod at the front end of the push rod is realized; the top rod device is formed by movably connecting the push rod with the rear end of the top rod, which facilitates production and manufacturing, splits the originally integrally processed top rod device into two sections, reduces the overall processing difficulty of the top rod device, simultaneously adapts to the slight deviation during assembly through the movable connection of the top rod and the push rod, ensures that the coaxiality of the top rod and the push rod with the guide hole in the valve seat of the cleaning machine pressure regulating valve is as close to zero as possible, avoids the situation that the production of the top rod device is inconvenient due to the length and precision problems, and improves the production efficiency.

Description

Technical Field

[0001] This technical solution relates to the field of micro switches for cleaning machines, and specifically refers to a push rod device for a micro switch for a cleaning machine. Background Technology

[0002] A cleaning machine is a machine that uses a power unit to drive a plunger pump to generate high-pressure water to rinse the surface of an object.

[0003] For example, Chinese patent CN201620431191.1 discloses a gun-closing and stopping device for a high-pressure washer and a high-pressure washer, including a micro switch device and a push rod device for connecting the water outlet tee and the micro switch device. The push rod device includes a push rod and a push rod sleeve. The push rod can slide inside the push rod sleeve, thereby triggering the micro switch device to realize the gun-closing and stopping function. However, it still has some shortcomings: in order to ensure the accuracy of the driving force required to drive the push rod to move and trigger the micro switch, that is, to ensure the accuracy of the push rod triggering the micro switch, and to avoid the friction between the push rod and the inner wall of the guide hole in the push rod sleeve, which would cause the driving force required to drive the push rod to move to change, it is necessary to ensure that the coaxiality of the push rod and the guide hole is as close to zero as possible, so that the axes of the push rod and the guide hole are as coincident as possible. However, the existing push rod is too long, which makes the machining accuracy of the push rod high and inconvenient to manufacture.

[0004] For example, Chinese patent CN202122200523.9 discloses a gun-off and shutdown structure for a high-pressure washer, which includes a switch valve chamber, a switch valve core, and a switch spring. The switch valve core is integrally formed, and the force-bearing area at the rear end of the switch valve core is greater than that at the front end. This causes the switch valve core to move forward and trigger a micro switch when the same water pressure is applied to both ends of the switch valve core. Therefore, a switch spring needs to be designed to prevent the switch valve core from moving forward. However, when the water pressure of the washer is changed, the difference in force between the front and rear ends of the switch valve core will change. The elasticity of the switch spring needs to be adjusted to compensate for this difference. That is, different models of switch springs need to be disassembled and replaced to prevent the switch valve core from moving forward, which is inconvenient to use. Utility Model Content

[0005] The purpose of this technical solution is to provide a push rod device for a micro switch of a cleaning machine. By setting a push rod and a push rod, the rear end of the push rod is movably connected to the front end of the push rod to form a push rod device, which improves the problem of high processing accuracy requirements and inconvenient production caused by the excessive length of the push rod.

[0006] The purpose of this technical solution is achieved as follows: A push rod device for a micro switch in a cleaning machine, comprising: A push rod and a push rod are provided, wherein the rear end of the push rod is movably connected to the front end of the push rod, thereby enabling the push rod to swing at the front end of the push rod.

[0007] Preferably, the rear end of the push rod is provided with a connecting groove, and the inner side wall of the connecting groove is provided with an anti-detachment part; the front end of the push rod is provided with an anti-detachment component; When the front end of the push rod and the anti-detachment component are inserted into the connecting groove, the anti-detachment part moves to abut against the anti-detachment component to restrict the separation of the push rod and the top rod.

[0008] Preferably, the connecting groove has a swing space for the push rod and the anti-detachment component to swing.

[0009] Preferably, the front end side wall of the push rod is provided with a mounting groove, and the anti-detachment component is provided in the mounting groove.

[0010] Preferably, the anti-detachment component is a retaining ring, which is placed in the connecting groove by elastic deformation.

[0011] Preferably, the anti-detachment part is a convex ring, and the inner diameter of the anti-detachment part is smaller than the outer diameter of the anti-detachment component.

[0012] Preferably, the anti-detachment part is provided with a guide surface on the side near the opening of the connecting groove.

[0013] Preferably, a guide surface two is provided on the side of the anti-detachment part away from the opening of the connecting groove.

[0014] Preferably, the front end of the push rod has a front force-bearing surface, and the rear end of the push rod has a rear force-bearing surface, wherein the force-bearing area of ​​the rear force-bearing surface is greater than or equal to the force-bearing area of ​​the front force-bearing surface.

[0015] The key and beneficial technical effects of this technical solution compared to existing technologies are: 1. This technical solution forms a push rod device by movably connecting a push rod to the rear end of the push rod, which facilitates manufacturing. The push rod device, which originally needed to be machined as a whole, is split into two parts, reducing the overall processing difficulty of the push rod device. At the same time, by adapting to the slight deviation during assembly through the movable connection of the push rod and the push rod, the coaxiality of the push rod and the guide hole in the pressure regulating valve seat of the cleaning machine is kept as close to zero as possible. This avoids the inconvenience of producing the push rod device due to length and precision issues, thereby improving production efficiency.

[0016] 2. This technical solution utilizes a front force-bearing surface at the front end of the push rod and a rear force-bearing surface at the rear end of the push rod. The force-bearing area of ​​the rear force-bearing surface is greater than or equal to that of the front force-bearing surface. When water of the same pressure acts on the front and rear force-bearing surfaces (i.e., when the water pressure in the front and rear guide holes is the same), the force exerted by the water pressure on the rear force-bearing surface is less than or equal to the combined force of the water pressure exerted on the front force-bearing surface plus the force exerted by the reset elastic element on the front end of the push rod. This prevents the push rod and push rod from moving towards the front end of the front guide hole and triggering the micro switch. Regardless of changes in water pressure (i.e., changes in the water pressure sprayed by the water gun or changes in the water pressure delivered by the cleaning machine to the pressure regulating valve seat), there is no need to replace the reset elastic element with different elasticity, thus eliminating the need for disassembly and replacement, making it convenient to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this technical solution.

[0018] Figure 2 This is a cross-sectional view of the technical solution.

[0019] Figure 3 This is an exploded view of the technical solution.

[0020] Figure 4 This is a cross-sectional view of the push rod device of this technical solution installed inside the pressure regulating valve seat of the cleaning machine.

[0021] Figure 5 This is a cross-sectional view of the pressure regulating valve seat in this technical solution.

[0022] Reference numerals: 200, top rod; 201, push rod; 202, connecting groove; 203, anti-detachment part; 204, anti-detachment component; 205, swing space; 206, mounting groove; 207, guide surface one; 208, guide surface two; 209, front force-bearing surface; 210, rear force-bearing surface; 300. Micro switch; 301. Pressure regulating valve seat; 302. Guide hole; 303. Front guide hole; 304. Rear guide hole; 305. Reset elastic element. Detailed Implementation

[0023] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0024] Combination Figures 1-3 A push rod device for a micro switch of a cleaning machine includes a push rod 200 and a push rod 201. The rear end of the push rod 200 is movably connected to the front end of the push rod 201, so that the push rod 200 can swing at the front end of the push rod 201, that is, the push rod 200 can swing on the push rod 201, and the corresponding push rod 201 can also swing on the push rod 200.

[0025] like Figure 4Both the push rod 200 and the push rod 201 are installed in the guide hole 302 of the pressure regulating valve seat 301 of the cleaning machine. The front end of the push rod 200 is used to abut against and trigger the micro switch 300 of the cleaning machine. The push rod 200 is driven to move in the guide hole 302 by the water pressure change in the pressure regulating valve seat 301.

[0026] The push rod 200 and push rod 201 are designed separately but are movably connected together, reducing production difficulty and facilitating manufacturing. This ensures that the coaxiality of the push rod 200, push rod 201, and guide hole 302 is close to zero, reducing the friction between the outer sides of the push rod 200 and push rod 201 and the inner wall of the guide hole 302. This ensures that the driving force required to move the push rod 200 and trigger the micro switch 300 (the driving force is the water pressure inside the pressure regulating valve seat 301) is the set value, guaranteeing the accuracy of the micro switch 300 triggering. This avoids the problem of inaccurate micro switch triggering caused by the push rod 200 and push rod 201 being integrally formed and having an excessively high coaxiality with the guide hole 302, which would otherwise lead to increased friction between the push rod 200, push rod 201, and the inner wall of the guide hole 302.

[0027] Combination Figures 1-3 The rear end of the push rod 200 is provided with a connecting groove 202, and the inner side wall of the connecting groove 202 is provided with an anti-detachment part 203; the front end of the push rod 201 is provided with an anti-detachment component 204; when the front end of the push rod 201 and the anti-detachment component 204 are inserted into the connecting groove 202, the anti-detachment part 203 moves to abut against the anti-detachment component 204 to limit the separation of the push rod 201 and the push rod 200, that is, to prevent the front end of the push rod 201 from detaching from the connecting groove 202.

[0028] Combination Figures 2-3 The connecting groove 202 has a swing space 205, which is used for the swing of the push rod 201 and the anti-detachment component 204. That is, the push rod 201 and the anti-detachment component 204 can swing in the swing space 205, thereby realizing the position adjustment of the push rod 201 and the top rod 200 in the guide hole 302, ensuring that the coaxiality is as close to zero as possible. The diameter of the anti-detachment part 203 is smaller than the diameter of the connecting groove 202, and the diameter of the front end of the push rod 201 is smaller than the inner diameter of the anti-detachment part 203, so that the front end of the push rod 201 can pass through the anti-detachment part 203 and be placed in the connecting groove 202. Therefore, the inner diameter of the connecting groove 202 is larger than the diameter of the push rod 201, thereby forming the swing space 205 between the connecting groove 202 and the push rod 201.

[0029] Combination Figures 2-3 The front side wall of the push rod 201 is provided with a mounting groove 206, which is an annular groove, and an anti-detachment component 204 is provided inside the mounting groove 206.

[0030] The anti-detachment component 204 is a retaining ring, which is fitted inside the mounting groove 206. The retaining ring is made of rubber or silicone. The anti-detachment component 204 is placed in the connecting groove 202 by elastic deformation.

[0031] Combination Figures 2-3 The anti-detachment part 203 is a convex ring. The inner diameter of the anti-detachment part 203 is smaller than the outer diameter of the anti-detachment component 204, thereby ensuring that the anti-detachment part 203 can abut against the anti-detachment component 204, thus preventing the push rod 201 and the push rod 200 from separating.

[0032] Combination Figures 2-3 The anti-detachment part 203 is provided with a guide surface 207 on the side near the opening of the connecting groove 202. The guide surface 207 is used to guide the front end of the push rod 201 and the anti-detachment part 204 into the connecting groove 202 to achieve installation.

[0033] Combination Figures 2-3 The anti-detachment part 203 has a guide surface 208 on the side away from the groove of the connecting groove 202. Under the action of external force, the push rod 201 and the top rod 200 move away from each other. The guide surface 208 guides the anti-detachment part 204 to detach from the connecting groove 202, thereby realizing the separation of the push rod 201 and the top rod 200, which is convenient for maintenance and replacement.

[0034] Coaxiality is a positioning tolerance used to control the positional error of the measured actual element (i.e., the axis of the push rod 200 and the push rod 201) relative to the reference (the axis of the guide hole 302). The closer the coaxiality is to zero, the more the axis of the push rod 200 and the push rod 201 coincides with the axis of the guide hole 302.

[0035] Combination Figure 4 and Figure 5 The guide hole 302 includes a front guide hole 303 and a rear guide hole 304. After the push rod 200 and the push rod 201 are installed in the guide hole 302, the push rod 200 is slidably disposed in the front guide hole 303 and the push rod 201 is slidably disposed in the rear guide hole 304. The push rod 200 and the push rod 201 can block the front guide hole 303 and the rear guide hole 304. That is, an O-ring is sleeved on the outside of the push rod 200 and the push rod 201, and the O-ring abuts against the inner wall of the guide hole 302.

[0036] A reset elastic element 305 is provided in the front guide hole 303 of the guide hole 302. The reset elastic element 305 is a spring. The reset elastic element 305 abuts against the push rod 200 and the push rod seat 123. The reset elastic element 305 makes the front end of the push rod 200 and the push rod 201 tend to retract into the guide hole 302, thereby making the push rod 200 move away from the micro switch 300.

[0037] The front end of the push rod 200 has a front force-bearing surface 209, that is, a boss is provided on the side wall of the push rod 200, and the front end face of the boss is the front force-bearing surface 209. The rear end of the push rod 201 has a rear force-bearing surface 210. The force-bearing area of ​​the rear force-bearing surface 210 is greater than or equal to the force-bearing area of ​​the front force-bearing surface 209. When water of the same pressure acts on the front force-bearing surface 209 and the rear force-bearing surface 210, that is, when the water pressure in the front guide hole 303 and the rear guide hole 304 is the same, the force of the water pressure acting on the rear force-bearing surface 210 is less than or equal to the force of the water pressure acting on the front force-bearing surface 209 plus the force of the reset elastic element 305 acting on the push rod. The combined force of the front end of 200 prevents the push rod 200 and push rod 201 from moving towards the front end of the guide hole 303 and triggering the micro switch 300. Even if the push rod 200 does not move forward in the guide hole 302 and extend out of the front end of the guide hole 302, the micro switch 300 will not be triggered. No matter how the water pressure changes, that is, after the water pressure of the water gun changes (after the water pressure sent by the cleaning machine to the pressure regulating valve seat 301 changes), there is no need to replace the reset elastic element 305 with different elasticity, and there is no need to disassemble the micro switch 300 and the reset elastic element 305, which is convenient to use.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

[0039] It should be noted that the structures, proportions, and sizes depicted in the accompanying drawings are solely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation of this technical solution and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this technical solution, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms used in this specification, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity and not intended to limit the scope of implementation of this technical solution. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the technical solution's implementation.

[0040] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0041] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

Claims

1. A push rod device for a micro switch in a cleaning machine, characterized in that, include: The push rod (200) and the push rod (201) are connected at the rear end of the push rod (200) and at the front end of the push rod (201) to enable the push rod (200) to swing at the front end of the push rod (201).

2. The push rod device for a micro switch of a cleaning machine according to claim 1, characterized in that: The top rod (200) has a connecting groove (202) at its rear end, and an anti-detachment part (203) is provided on the inner side wall of the connecting groove (202); the push rod (201) has an anti-detachment component (204) at its front end. When the front end of the push rod (201) and the anti-detachment component (204) are inserted into the connecting groove (202), the anti-detachment part (203) moves to abut against the anti-detachment component (204) to restrict the separation of the push rod (201) and the top rod (200).

3. The push rod device for a micro switch of a cleaning machine according to claim 2, characterized in that: The connecting groove (202) has a swing space (205) for the push rod (201) and the anti-detachment component (204) to swing.

4. The push rod device for a micro switch of a cleaning machine according to claim 2 or 3, characterized in that: The front side wall of the push rod (201) is provided with a mounting groove (206), and the anti-detachment component (204) is provided in the mounting groove (206).

5. The push rod device for a micro switch of a cleaning machine according to claim 4, characterized in that: The anti-detachment component (204) is a retaining ring. The anti-detachment component (204) is placed in the connecting groove (202) by elastic deformation.

6. The push rod device for a micro switch of a cleaning machine according to claim 2, 3, or 5, characterized in that: The anti-detachment part (203) is a convex ring, and the inner diameter of the anti-detachment part (203) is smaller than the outer diameter of the anti-detachment component (204).

7. The push rod device for a micro switch of a cleaning machine according to claim 6, characterized in that: The anti-detachment part (203) is provided with a guide surface (207) on the side near the opening of the connecting groove (202).

8. The push rod device for a micro switch of a cleaning machine according to claim 6, characterized in that: The anti-detachment part (203) has a guide surface two (208) on the side away from the opening of the connecting groove (202).

9. The push rod device for a micro switch of a cleaning machine according to claim 1, 2, 3, 5, 7, or 8, characterized in that: The front end of the push rod (200) has a front force-bearing surface (209), and the rear end of the push rod (201) has a rear force-bearing surface (210). The force-bearing area of ​​the rear force-bearing surface (210) is greater than or equal to the force-bearing area of ​​the front force-bearing surface (209).

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