Limit switch structure for an electric sandblasting machine

Abstract

This application discloses a limit switch structure for an electric sandblasting machine, comprising: a gravel tank with a gravel hose mounted thereon; a connecting plate, one end of the gravel hose being able to enter the connecting plate; a pressing block, horizontally positioned and passing through the connecting plate, contacting and pressing the gravel hose to close it; and a control knob positioned above the connecting plate, with an eccentric block at its bottom. The control knob can be rotated to lock and unlock the pressing block. In the locked state, the eccentric block restricts the pressing block from pressing towards the gravel hose. By simply rotating the control knob, the movement of the pressing block can be restricted, ensuring that the pressing block will not press the gravel hose for an extended period due to non-human intervention when locked.

Description

Technical Field

[0001] This application relates to the field of sandblasting machine technology, and in particular to a limit switch structure for an electric sandblasting machine. Background Technology

[0002] Adjustable flow mobile sandblasting machine is an auxiliary device used for sandblasting the surface of casting blanks. It is widely used in the field of mechanical equipment. The existing flow regulation structure is similar to the principle of tap water valve switch. It uses a rotating valve ball with a through hole. The flow rate and closing function are controlled by controlling the size of the opening. When this structure is used in the case of sand particles, the sand particles are very small and can easily penetrate into the gaps, causing the structure to move poorly and eventually get stuck.

[0003] Based on this, a sand flow rate and velocity control structure, as proposed by the applicant in publication number CN219325141U, is used to adjust the sand output by controlling the closure and opening size of the flexible hose. The control structure does not contact the sand particles, but only the flexible hose controlling the sand particles. This avoids the original structure where sand particles can seep into gaps, causing the mechanism to jam. However, such hoses are often made of rubber. Therefore, if external forces, such as incorrect placement, cause the control structure to keep the sand hose in a closed state for a long time, the rubber hoses will age and stick together. Therefore, a locking mechanism that can restrict the control structure is needed as a safety measure.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides a limit switch structure for an electric sandblasting machine to solve one of the aforementioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is a limit switch structure for an electric sandblasting machine, including: a gravel tank with a gravel hose mounted thereon; a connecting plate, one end of the gravel hose being able to enter the connecting plate; an extrusion block, horizontally positioned and passing through the connecting plate, contacting and extruding the gravel hose to close it; and a control knob, positioned above the connecting plate, with an eccentric block at the bottom of the control knob. The control knob can be rotated to put the extrusion block into a locked state and an unlocked state. In the locked state, the eccentric block can restrict the extrusion block from extruding towards the gravel hose.

[0007] In some embodiments, the extrusion block is provided with a first limiting groove that cooperates with the eccentric block.

[0008] In some embodiments, a movable chamber is formed on the connecting plate, and the extrusion block can engage with the gravel hose within the movable chamber.

[0009] In some embodiments, a limit pin is provided at the bottom of the active chamber, and a second limit groove is provided on the extrusion block to cooperate with the limit pin.

[0010] In some embodiments, the connecting plate includes a top shell, an inner shell, and a hose outer shell. The top shell is disposed above the inner shell, and the hose outer shell is disposed at the center of the top shell and the outer shell. One end of the gravel hose is inserted into the hose outer shell, and a first insertion groove is formed on the outer periphery of the hose outer shell. The compression block can be inserted into the insertion groove to cooperate with the gravel hose.

[0011] In some embodiments, the inner shell is provided with a second insertion groove that mates with the first insertion groove, and the top of the inner shell is also provided with a limiting channel for limiting the extrusion block.

[0012] In some embodiments, a ring track is provided above the connecting disc, and locking recesses are provided at both ends of the ring track. A spring pin is provided at the bottom of the control knob, and the spring pin can lock the state of the control knob by rotating the control knob into the locking recess.

[0013] The beneficial effect of this application is that by rotating the control knob, the eccentric block at the bottom of the control knob can be deflected or deviated from the direction of the tail of the extrusion block, thus restricting the movement of the extrusion block so that it cannot extrude the gravel hose or leaving space for extruding the gravel hose. Therefore, the movement of the extrusion block can be restricted by simply rotating the control knob, ensuring that the extrusion block will not extrude the gravel hose for a long time due to non-human behavior when it is locked. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of this application.

[0016] Figure 2 This is a schematic diagram of the exploded structure of this application.

[0017] Figure 3 This is a side sectional view of this application.

[0018] Figure 4 This is a top sectional view of this application.

[0019] Reference numerals: 1. Gravel container; 11. Gravel hose; 2. Connecting disc; 21. Movable compartment; 211. Limiting pin; 22. Top shell; 23. Inner shell; 231. Second insertion groove; 232. Restriction channel; 24. Hose outer shell; 241. First insertion groove; 25. Ring track; 251. Locking pit; 3. Extrusion block; 31. First limiting groove; 32. Second limiting groove; 4. Control knob; 41. Eccentric block; 42. Spring pin. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0021] In the embodiments of this application, please refer to Figure 1-4 As shown, this application provides a limit switch structure for an electric sandblasting machine, mainly including: a gravel tank 1, on which a gravel hose 11 is provided; a connecting plate 2, one end of the gravel hose 11 can enter the connecting plate 2; a pressing block 3, which is horizontally arranged and passes through the connecting plate 2 and contacts and presses the gravel hose 11 to close the gravel hose 11; a control knob 4, which is arranged above the connecting plate 2, and an eccentric block 41 is provided at the bottom of the control knob 4. The control knob 4 can rotate to put the pressing block 3 into a locked state and an unlocked state. In the locked state, the eccentric block 41 can restrict the pressing block 3 from pressing towards the gravel hose 11.

[0022] Specifically, the control knob 4 can be rotated on the connecting plate 2 to enter a locked state and an unlocked state. In the locked state, the larger area of ​​the eccentric block 41 is located on the side closer to the inlet end of the extrusion block 3 when the control knob 4 is rotated, and the maximum movement distance of the extrusion block 3 is restricted. Therefore, it cannot cooperate with the gravel hose 11. In the unlocked state, the larger area of ​​the eccentric block 41 is located on the side farther away from the inlet end of the extrusion block 3 when the control knob 4 is rotated. At this time, although the eccentric block 41 can still restrict the maximum movement distance of the extrusion block 3, it has a larger movement space compared to the locked state. Therefore, the extrusion block 3 can cooperate with the gravel hose 11.

[0023] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0024] Specifically, the extrusion block 3 is provided with a first limiting groove 31 that cooperates with the eccentric block 41. The eccentric block 41 can enter the first limiting groove 31. When the extrusion block 3 moves, the inner wall of the first limiting groove 31 can cooperate with the eccentric block and be limited by it.

[0025] Reference Figure 3 As shown, a movable chamber 21 is formed on the connecting plate 2, and the extrusion block 3 can cooperate with the gravel hose 11 inside the movable chamber 21.

[0026] Reference Figure 4 As shown, the bottom of the active chamber 21 is provided with a limiting pin 211, and the extrusion block 3 is provided with a second limiting groove 32 that cooperates with the limiting pin 211. The limiting pin 211 can be moved and mounted on the extrusion block 3 with the eccentric block 41 to limit the shaking of the eccentric block 41 and enable it to cooperate precisely with the gravel hose 11.

[0027] Reference Figure 2 As shown, to restrict the movement of the extrusion block 3, the connecting disc 2 includes a top shell 22, an inner shell 23, and a hose outer shell 24. The top shell 22 is positioned above the inner shell 23, and the hose outer shell 24 is positioned at the center of the top shell 22 and the outer shell. One end of the gravel hose 11 is inserted into the hose outer shell 24. A first insertion groove 241 is formed on the outer periphery of the hose outer shell 24, allowing the extrusion block 3 to be inserted into the insertion groove and engage with the gravel hose 11. A second insertion groove 231 is formed on the inner shell 23 to engage with the first insertion groove 241. A limiting channel 232 is also provided on the top of the inner shell 23 to restrict the extrusion block 3.

[0028] Reference Figure 2 As shown, a ring track 25 is provided above the connecting plate 2, and locking pits 251 are provided at both ends of the ring track 25. A spring pin 42 is provided at the bottom of the control knob 4. The spring pin 42 can lock the state of the control knob 4 by rotating the control knob 4 into the locking pit 251. The spring pin 42 and the locking pit 251 can fix the control knob 4 in a preset position so that the eccentric block 41 can be activated. The ring track 25 can prevent the spring pin 42 from dislodging.

[0029] The various embodiments of this application have been described in detail above. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description. Finally, it should be noted that the above descriptions are merely preferred embodiments of this application, and the foregoing embodiments are only used to illustrate the technical solutions of this application, not to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A limit switch structure for an electric sandblasting machine, characterized in that, include: Gravel container, equipped with a gravel hose; A connecting disc is provided, and one end of the gravel hose can enter the connecting disc. The extrusion block is horizontally positioned and passes through the connecting disc, contacts the gravel hose, and is squeezed to close the gravel hose. A control knob is located above the connecting plate. An eccentric block is provided at the bottom of the control knob. The control knob can be rotated to put the extrusion block into a locked state and an unlocked state. In the locked state, the eccentric block can restrict the extrusion block from being extruded towards the gravel hose.

2. The position-limiting switch structure of an electric sand blasting machine according to claim 1, wherein, The extrusion block has a first limiting groove that cooperates with the eccentric block.

3. The position-limiting switch structure of an electric sand blasting machine according to claim 1, wherein, A movable chamber is formed on the connecting plate, and the extrusion block can cooperate with the gravel hose inside the movable chamber.

4. The limit switch structure of the electric sand blasting machine according to claim 3, wherein The bottom of the active compartment is provided with a limit pin, and the extrusion block is provided with a second limit groove that cooperates with the limit pin.

5. The position-limiting switch structure of an electric sandblasting machine according to claim 1, characterized in that, The connecting plate includes a top shell, an inner shell, and a hose outer shell. The top shell is located above the inner shell, and the hose outer shell is located at the center of the top shell and the outer shell. One end of the gravel hose is inserted into the hose outer shell. A first insertion groove is provided on the outer periphery of the hose outer shell, and the compression block can be inserted into the insertion groove to cooperate with the gravel hose.

6. The limit switch structure of an electric sand blasting machine according to claim 5, wherein The inner shell has a second insertion groove that mates with the first insertion groove, and the top of the inner shell is also provided with a limiting channel for limiting the extrusion block.

7. The position-limiting switch structure of an electric sand blasting machine according to claim 1, wherein, A ring track is provided above the connecting plate, and locking pits are provided at both ends of the ring track. A spring pin is provided at the bottom of the control knob. The spring pin can lock the control knob by rotating it into the locking pit.

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