A keyboard valve terminal for a sander

Abstract

The utility model discloses a sanding machine is with the keyboard formula valve island, including cylinder, be connected with apron on the cylinder, be connected with a plurality of two -way three -way solenoid valve on the apron, define apron's extension direction as first direction, a plurality of two -way three -way solenoid valve is along first direction and is arranged in keyboard formula, be equipped with a plurality of containing cavities in the cylinder, and the piston rod subassembly is movably arranged in the containing cavity, and the piston rod subassembly with two -way three -way solenoid valve one -to -one corresponding setting, and each group two -way three -way solenoid valve control corresponding piston rod subassembly action, and apron is equipped with concentrated air inlet, concentrated exhaust, a plurality of air inlet cavities and a plurality of exhaust cavities, and all air inlet cavities are interconnected, and all exhaust cavities are interconnected, and concentrated air inlet is communicated with two -way three -way solenoid valve through air inlet cavity, and containing cavity is communicated with concentrated exhaust through exhaust cavity, and keyboard formula design makes pressure distribution more uniform, and each group two -way three -way solenoid valve can be controlled individually, and makes sanding machine can adapt to the wood of different material and thickness.

Description

Technical Field

[0001] This utility model relates to the field of valve island technology, and in particular to a piano key type valve island for a sander. Background Technology

[0002] Sanders use high-speed rotating sanding belts or wheels to grind and polish the surface of wood to remove burrs and smooth the surface. Traditional sanders often have rigid pressure components (such as pressure beams and rollers). Because the surface of wood is uneven, rigid pressure components apply excessive pressure to raised areas and less pressure to recessed areas, resulting in uneven pressure distribution. In addition, some sanders use single-point drive pressure such as cylinders or hydraulic cylinders, which tend to concentrate pressure in the contact center area while the pressure decreases at the edges, also resulting in uneven pressure distribution. Therefore, improvements are necessary. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a piano key type valve island for sanders. Its structure is simple and reasonable, and it is easy to operate. It adopts a high-density, small-pitch distribution design, which makes the pressure distribution during the sanding process more uniform and reduces the defects on the wood surface caused by uneven pressure. Moreover, each set of two-position three-way solenoid valves can be controlled independently without interference. By controlling the piston rod to extend and retract within a small range in a short time through the two-position three-way solenoid valves, the sanding belt can conform to the uneven wood surface.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a piano key type valve island for a sander, comprising a cylinder body, a cover plate fixedly connected to the cylinder body, and a plurality of two-position three-way solenoid valves fixedly connected to the cover plate. The extension direction of the cover plate is defined as the first direction, and the plurality of two-position three-way solenoid valves are evenly arranged in a piano key pattern along the first direction. Each group of two-position three-way solenoid valves can work independently. The cylinder body is provided with several receiving cavities, and a piston rod assembly is movably arranged in each receiving cavity. The piston rod assembly is arranged in a one-to-one correspondence with a two-position three-way solenoid valve. The piston rod assembly includes a piston rod. Each two-position three-way solenoid valve controls the movement of the corresponding piston rod. The cylinder body is provided with a through hole for the piston rod to extend out. The cover plate is provided with a centralized air inlet, a centralized air outlet, several air inlets and several air outlets. The air inlets and air outlets are arranged in a one-to-one correspondence with the two-position three-way solenoid valves. All air inlets are interconnected, and all air outlets are interconnected. Adjacent air inlets are connected through a first guide hole, and adjacent air outlets are connected through a second guide hole. The centralized air inlet is connected to the two-position three-way solenoid valves through the air inlets, and the receiving cavity is connected to the centralized air outlet through the air outlets.

[0005] Furthermore, the cover plate is also provided with several air inlets and several working holes, which are arranged in a one-to-one correspondence with the two-position three-way solenoid valve. The piston rod assembly also includes a piston, which is fixedly connected to the piston rod. A first cavity is provided between the piston and the cover plate. The air inlet cavity is connected to the two-position three-way solenoid valve through the air inlet. The two-position three-way solenoid valve is used to control the opening and closing of the working hole, which is connected to the first cavity.

[0006] Furthermore, the piston rod assembly also includes a return spring, which is sleeved on the outside of the piston rod, and the return spring ensures that the piston rod always has a tendency to retract.

[0007] Furthermore, a wear-resistant ring is fitted around the outer periphery of the piston, and the wear-resistant ring contacts the peripheral sidewall of the receiving cavity.

[0008] Furthermore, a buffer pad is provided between the piston and the cover plate.

[0009] Furthermore, the number of the two-position three-way solenoid valves is set to 88 sets.

[0010] Furthermore, the cover plate has two centralized air inlets and two centralized exhaust outlets, with the two centralized air inlets symmetrically distributed along the center line of the cover plate and the two centralized exhaust outlets symmetrically distributed along the center line of the cover plate.

[0011] Furthermore, both the first guide hole and the second guide hole are arranged along the first direction.

[0012] Furthermore, a first sealing ring is provided between the intake chamber and the two-position three-way solenoid valve, and a second sealing ring is provided between the exhaust chamber and the two-position three-way solenoid valve.

[0013] Furthermore, a first mounting groove is provided on the outer periphery of the air intake chamber, and the first sealing ring is located in the first mounting groove; a second mounting groove is provided on the outer periphery of the exhaust chamber, and the second sealing ring is located in the second mounting groove.

[0014] The beneficial effects of this utility model are as follows: The piano key valve island for a sander described in this utility model adopts a centralized air intake and exhaust method, which can effectively reduce the number of gas pipeline connections, reduce installation complexity and cost. In addition, the piano key valve island adopts a high-density, small-pitch distribution design, which makes the pressure distribution during the sanding process more uniform and reduces wood surface defects caused by uneven pressure. Each set of two-position three-way solenoid valves can be controlled independently without interference. During the sanding process, the extension distance of each piston rod can be adjusted in real time as needed. The output end of the piston rod acts on the sanding belt. When the wood surface is uneven, by controlling the corresponding two-position three-way solenoid valve to turn on and off for a short time, the piston rod can be extended and retracted within a small range in a short time, so that the sanding belt can fit the uneven wood surface. This allows the sander to adapt to wood of different materials and thicknesses, ensuring processing accuracy, while improving the adaptability and stability of the equipment. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the present invention from a first-view perspective; Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at point AA; Figure 3 yes Figure 2 Enlarged structural diagram at point C; Figure 4 yes Figure 1 Enlarged structural diagram at point B; Figure 5 This is a partial structural schematic diagram of the present invention from a second perspective; Figure 6 This is a partial structural schematic diagram of the present invention from a third-person perspective; Figure 7 This is a partial structural diagram of the cover plate from a fourth-person perspective; Figure 8 This is a partial structural diagram of the cover plate from a fifth-person perspective.

[0016] Figures 1-8In the middle section: 1. Cylinder block; 2. Cover plate; 21. Centralized air intake port; 22. Centralized exhaust port; 23. Intake chamber; 231. First mounting groove; 24. Exhaust chamber; 241. Second mounting groove; 25. First guide hole; 26. Second guide hole; 27. Intake port; 28. Working hole; 3. Two-position three-way solenoid valve; 31. Stationary iron core; 311. Exhaust passage; 32. Moving iron core; 33. Sealing gasket; 34. Iron core spring; 35. Pilot chamber; 36. Sleeve; 37. Intake P port; 41. First chamber; 42. Second chamber; 51. Piston rod; 52. Piston; 521. Wear ring; 522. Piston seal ring; 523. Buffer pad; 53. Return spring; 61. First air passage; 62. Second air passage. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 1-8 The illustrated piano key type valve island for a sander includes a cylinder body 1, on which a cover plate 2 is fixedly connected. The extension direction of the cover plate 2 is defined as the first direction. Several two-position three-way solenoid valves 3 are fixedly connected to the cover plate 2. The several two-position three-way solenoid valves 3 are evenly arranged in a piano key pattern along the first direction of the cover plate 2. This optimized piano key arrangement makes the pressure distribution during the sanding process uniform, effectively improving the sanding efficiency, while reducing wood surface defects caused by uneven pressure. Each set of two-position three-way solenoid valves 3 can work independently. The cylinder body 1 has several receiving cavities, and a piston rod assembly is movably arranged in each receiving cavity. The piston rod assembly is arranged in a one-to-one correspondence with the two-position three-way solenoid valve 3. The piston rod assembly includes a piston rod 51, a piston 52, and a return spring 53. The piston 52 is fixedly connected to the piston rod 51 and is located at the end of the piston rod 51 near the cover plate 2. The piston 52 divides the receiving cavity into a first cavity 41 and a second cavity 42. The return spring 53 is sleeved on the outside of the piston rod 51. The return spring 53 makes the piston rod 51 always have a tendency to retract. Each set of two-position three-way solenoid valves 3 individually controls the action of the corresponding piston rod 51. The cylinder body 1 is provided with a through hole for the piston rod 51 to extend. The output end of the piston rod 51 acts on the sanding belt, so that the sanding belt adheres to the wood surface. When the two-position three-way solenoid valve 3 is energized, the control piston rod 51 extends out of the through hole; when the two-position three-way solenoid valve 3 is de-energized, the control piston rod 51 retracts. By controlling the corresponding two-position three-way solenoid valve, each piston rod assembly can be controlled independently, just like piano keys. It can be operated individually according to actual needs, which improves the flexibility and practicality of the piano key valve island for sanders and can better adapt to different working scenarios and process requirements.

[0019] The cover plate 2 is provided with a centralized air inlet 21, a centralized exhaust outlet 22, several air inlet chambers 23, and several exhaust chambers 24. The air inlet chambers 23 and exhaust chambers 24 are arranged in a one-to-one correspondence with the two-position three-way solenoid valve 3. All air inlet chambers 23 are interconnected, and all exhaust chambers 24 are interconnected. Adjacent two air inlet chambers 23 are connected through a first guide hole 25, and adjacent two exhaust chambers 24 are connected through a second guide hole 26. The centralized air inlet 21 is connected to the two-position three-way solenoid valve 3 through the air inlet chamber 23, and the receiving cavity is connected to the exhaust chamber 24. In this embodiment, the first guide hole 25 and the second guide hole 26 are both arranged along the first direction of the cover plate 2, that is, along the length direction of the cover plate 2. The first guide hole 25 and the second guide hole 26 can guide the gas direction. When gas is introduced into the centralized air inlet 21, the gas can be quickly distributed to each corresponding two-position three-way solenoid valve 3 through the interconnected air inlet chamber 23, thereby controlling the action of the piston rod assembly. Excess gas can be discharged from the centralized exhaust port 22 through the exhaust chamber 24.

[0020] Preferably, in this embodiment, the cover plate 2 is further provided with a plurality of air inlets 27 and a plurality of working holes 28, the air inlets 27 and the working holes 28 being arranged in a one-to-one correspondence with the two-position three-way solenoid valve 3. The air inlets 27 are connected to the air inlet chamber 23 through a first air passage 61, and the receiving chamber is connected to the exhaust chamber 2424 through a second air passage 62. The two-position three-way solenoid valve 3 is provided with a pilot chamber 35. The two-position three-way solenoid valve 3 includes a coil assembly, a sleeve 36, a stationary iron core 31, a moving iron core 32, and an iron core spring 34. The coil assembly is fixedly disposed outside the sleeve 36, and the stationary iron core 31 is fixedly disposed inside the sleeve 36. The stationary iron core 31 has an exhaust channel 311, and the exhaust channel 311 is connected to the atmosphere. The moving iron core 32 is movably disposed within the sleeve 36 and corresponds to and cooperates with the stationary iron core 31. Part of the moving iron core 32 extends into the pilot cavity 35 and is provided with a sealing gasket 33. The two-position three-way solenoid valve 3 has an air inlet P port 37 and a working A port. The air inlet P port 37 is connected to the air inlet hole 27, and the working A port is connected to the working hole 28. One end of the iron core spring 34 abuts against the moving iron core 32, and the other end of the iron core spring 34 abuts against the moving iron core 32. Under the elastic force of the iron core spring 34, the sealing gasket 33 always has the tendency to seal the air inlet P port 37. The piston 52 and the cover plate 2 are provided with the first cavity 41. The compressed gas in the air inlet cavity 23 enters the pilot cavity 35 through the air inlet hole 27.

[0021] When the coil assembly is energized, the moving iron core 32 is attracted towards the stationary iron core 31, opening the air inlet P port 37. At this time, the air inlet P port 37 is connected to the working A port, and the moving iron core 32 seals the exhaust channel 311. The compressed gas in the air inlet chamber 23 enters the pilot chamber 35 through the air inlet hole 27 and the air inlet P port 37. The compressed air in the pilot chamber 35 enters the first chamber 41 through the working A port and the working hole 28. The compressed gas acts on the piston 52, causing the piston 52 to push the piston rod 51 against the current. The spring force of the return spring 53 causes the piston rod 51 to extend out of the through hole. When the coil assembly is de-energized, the moving iron core 32 is reset under the spring force of the iron core spring 34, the sealing gasket 33 seals the air inlet P port 37, the exhaust channel 311 is opened, and the excess compressed gas in the first chamber 41 is discharged from the exhaust channel 311. The piston rod 51 retracts under the spring force of the return spring 53. When the piston rod 51 moves, the excess gas in the receiving chamber is discharged from the centralized exhaust port 22 through the exhaust chamber 24.

[0022] Preferably, in this embodiment, the number of two-position three-way solenoid valves 3 is set to 88 sets, and correspondingly, the piston rod assembly is also set to 88 sets, which effectively improves sanding efficiency. The 88 sets of two-position three-way solenoid valves 3 are arranged in a piano key pattern and are designed with high density and small spacing, so that the pressure distribution during the sanding process is more uniform, reducing wood surface defects caused by uneven pressure. Moreover, the 88 sets of two-position three-way solenoid valves 3 can be controlled individually without interfering with each other. During the sanding process, the extension distance of each piston rod 51 can be adjusted in real time as needed to make the sanding belt fit the uneven wood surface, so that the sander can adapt to wood of different materials and thicknesses, ensuring processing accuracy, while improving the adaptability and stability of the equipment.

[0023] Specifically, when the surface of the wood is uneven, by controlling the corresponding two-position three-way solenoid valve to turn on and off the power for a short period of time, the piston rod 51 can be extended and retracted within a small range for a short period of time.

[0024] Preferably, in this embodiment, the cover plate 2 has two centralized air inlets 21 and two centralized exhaust outlets 22. The two centralized air inlets 21 are symmetrically distributed along the center line of the cover plate 2. Setting two centralized air inlets 21 can allow for more efficient air intake. The two centralized exhaust outlets 22 are symmetrically distributed along the center line of the cover plate 2. Setting two centralized exhaust outlets 22 can allow for more efficient exhaust of excess gas.

[0025] Preferably, in this embodiment, a first sealing ring is provided between the air intake chamber 23 and the two-position three-way solenoid valve 3, which can effectively play a sealing role and prevent air leakage; a second sealing ring is provided between the exhaust chamber 24 and the two-position three-way solenoid valve 3, which can effectively play a sealing role and prevent air leakage.

[0026] Preferably, in this embodiment, the outer periphery of the air intake chamber 23 is provided with a first mounting groove 231, and the first sealing ring is located in the first mounting groove 231, which can effectively prevent the first sealing ring from falling off. The outer periphery of the exhaust chamber 24 is provided with a second mounting groove 241, and the second sealing ring is located in the second mounting groove 241, which can effectively prevent the second sealing ring from falling off. The cross-sections of the air intake chamber 23 and the exhaust chamber 24 are both waist-shaped.

[0027] Preferably, in this embodiment, the piston 52 is fitted with a piston sealing ring 522 and a wear-resistant ring 521 on its outer periphery. The piston sealing ring 522 is sealed to the peripheral wall of the receiving cavity to prevent air leakage. The wear-resistant ring 521 contacts the peripheral wall of the receiving cavity. The wear-resistant ring 521 can reduce the friction and wear between the piston 52 and the peripheral wall of the receiving cavity, and extend the service life of the piston 52 and the receiving cavity.

[0028] Preferably, in this embodiment, a buffer pad 523 is provided between the piston 52 and the cover plate 2. The cover plate 2 is provided with a third mounting groove for installing the buffer pad 523. The buffer pad 523 is located in the third mounting groove to ensure a stable and reliable connection. The buffer pad 523 is made of rubber material and has good elasticity and cushioning performance. The buffer pad 523 can effectively reduce the direct collision and impact between the piston 52 and the cover plate 2 during the movement, and extend the service life of the piston 52 and the cover plate 2.

[0029] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A key-type valve island for a sander, characterized in that: Includes a cylinder body (1), on which a cover plate (2) is fixedly connected, and on which a number of two-position three-way solenoid valves (3) are fixedly connected. The extension direction of the cover plate (2) is defined as the first direction. The number of two-position three-way solenoid valves (3) are evenly arranged in a piano key pattern along the first direction. Each group of two-position three-way solenoid valves (3) can work independently. The cylinder (1) is provided with several accommodating cavities. A piston rod assembly is movably arranged in the accommodating cavity. The piston rod assembly is arranged in a one-to-one correspondence with the two-position three-way solenoid valve (3). The piston rod assembly includes a piston rod (51). Each two-position three-way solenoid valve (3) controls the corresponding piston rod (51) to move. The cylinder (1) is provided with a through hole for the piston rod (51) to extend out. The cover plate (2) is provided with a centralized air inlet (21), a centralized exhaust outlet (22), several air inlets (23) and several exhaust outlets (24). The air inlets (23) and exhaust outlets (24) are arranged in a one-to-one correspondence with the two-position three-way solenoid valve (3). All air inlets (23) are interconnected, and all exhaust outlets (24) are interconnected. Adjacent air inlets (23) are connected through a first guide hole (25), and adjacent exhaust outlets (24) are connected through a second guide hole (26). The centralized air inlet (21) is connected to the two-position three-way solenoid valve (3) through the air inlet (23), and the receiving cavity is connected to the centralized exhaust outlet (22) through the exhaust outlets (24).

2. The key-type valve island for a sander according to claim 1, characterized in that: The cover plate (2) is also provided with a number of air inlets (27) and a number of working holes (28). The air inlets (27) and working holes (28) are arranged in a one-to-one correspondence with the two-position three-way solenoid valve (3). The piston rod assembly also includes a piston (52). The piston (52) is fixedly connected to the piston rod (51). A first chamber (41) is provided between the piston (52) and the cover plate (2). The air inlet chamber (23) is connected to the two-position three-way solenoid valve (3) through the air inlet (27). The two-position three-way solenoid valve (3) is used to control the opening and closing of the working hole (28). The working hole (28) is connected to the first chamber (41).

3. The key-type valve island for a sander according to claim 2, characterized in that: The piston rod assembly also includes a return spring (53), which is sleeved on the outside of the piston rod (51) and ensures that the piston rod (51) always has a tendency to retract.

4. The key-type valve island for a sander according to claim 2, characterized in that: The piston (52) is fitted with a wear-resistant ring (521) on its outer periphery, and the wear-resistant ring (521) is in contact with the peripheral wall of the cavity.

5. The key-type valve island for a sander according to claim 2, characterized in that: A buffer pad (523) is provided between the piston (52) and the cover plate (2).

6. The key-type valve island for a sander according to claim 1, characterized in that: The number of the two-position three-way solenoid valves (3) is set to 88 sets.

7. The key-type valve island for a sander according to claim 1, characterized in that: The cover plate (2) has two centralized air inlets (21) and two centralized exhaust outlets (22). The two centralized air inlets (21) are symmetrically distributed along the center line of the cover plate (2), and the two centralized exhaust outlets (22) are symmetrically distributed along the center line of the cover plate (2).

8. The piano-key type valve island for a sander according to claim 1, characterized in that: The first guide hole (25) and the second guide hole (26) are both arranged along the first direction.

9. The key-type valve island for a sander according to claim 1, characterized in that: A first sealing ring is provided between the air intake chamber (23) and the two-position three-way solenoid valve (3), and a second sealing ring is provided between the exhaust chamber (24) and the two-position three-way solenoid valve (3).

10. A key-type valve island for a sander according to claim 9, characterized in that: The air intake chamber (23) is provided with a first mounting groove (231) on its outer periphery, and the first sealing ring is located in the first mounting groove (231). The exhaust chamber (24) is provided with a second mounting groove (241) on its outer periphery, and the second sealing ring is located in the second mounting groove (241).

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