Reversing device of pneumatic engraving machine
By designing the cylinder liner and cylinder wall structure of specific air holes and annular projections in the pneumatic engraving machine, combined with plastic material, the structural complexity and corrosion problems of the pneumatic engraving machine reversing device are solved, and efficient reversing and stable operation are achieved.
Patent Information
- Application Number
- CN202422516558.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-10-17
AI Technical Summary
The reversing device of existing pneumatic engraving machines has complex structures, high production and assembly costs, and most parts lead to easy damage and are prone to corrosion and failure in humid environments.
A pneumatic engraving machine reversing device including a shell, cylinder liner, cylinder, buffer assembly, valve sleeve and piston is designed. By setting specific air holes and annular protrusions on the cylinder liner and cylinder wall, efficient reversing and buffering are achieved, and plastic materials are used to reduce corrosion, and switching frequency and working efficiency are improved.
It improves the switching frequency of the reversing device and the working efficiency of the engraving machine, reduces heating and corrosion problems, and reduces energy loss and equipment damage risks.
Smart Images
Figure CN223072198U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pneumatic engraving machines, and particularly relates to a commutation device for a pneumatic engraving machine. Background Technique
[0002] The commutation device of a pneumatic engraving machine can convert the internal energy of compressed air into kinetic energy, and is the generating mechanism for the reciprocating motion of the engraving machine. It is like the heart of the engraving machine, and its quality directly affects the performance and service life of the engraving machine. The commutation device of a pneumatic engraving machine can be divided into two categories: rotary and reciprocating. The rotary commutation device is usually applied to large pneumatic equipment. For small pneumatic equipment, the reciprocating commutation device is usually used. However, the existing commutation device of a pneumatic engraving machine has a complex structure, high production and assembly costs, and the excessive number of parts makes the pneumatic engraving machine prone to damage. Content of the Utility Model
[0003] The purpose of the utility model is to provide a commutation device for a pneumatic engraving machine to solve the problems existing in the above background technique.
[0004] To achieve the above purpose, the present application is realized through the following technical solutions:
[0005] A commutation device for a pneumatic engraving machine includes a housing, a cylinder sleeve, a cylinder, and a commutation device assembly; the commutation device assembly includes a buffer assembly, a valve sleeve, and a piston; the buffer assembly is arranged inside the housing, the cylinder sleeve is installed at the rear end of the cylinder, one end of the buffer assembly abuts against the cylinder sleeve, and the other end abuts against the housing; the valve sleeve and the piston are arranged in the space formed by the cylinder and the cylinder sleeve;
[0006] A first annular protrusion extending inwards is arranged in the inner cavity of the cylinder sleeve, and a first air hole and a second air hole are arranged on the first annular protrusion;
[0007] A ring-shaped wall extending inwards is arranged near the right end of the inner cavity of the cylinder. A third air hole, a fourth air hole, and a fifth air hole are respectively arranged on the ring-shaped wall. A second annular protrusion extending outwards is arranged on the outer wall of the cylinder; a seventh air hole and an eighth air hole are respectively arranged on the cylinder wall between the second annular protrusion and the end near the cylinder sleeve; a ninth air hole and a tenth air hole are respectively arranged on the cylinder wall between the second annular protrusion and the end far from the cylinder sleeve;
[0008] The first air hole is communicated with the third air hole, and the second air hole is simultaneously communicated with the fourth air hole and the fifth air hole;
[0009] Among them, the third air hole is communicated with the sixth air hole opening into the inner cavity of the cylinder through the first air passage arranged on the side wall of the cylinder, the seventh air hole is communicated with the ninth air hole opening into the inner cavity of the cylinder through the second air passage arranged on the side wall of the cylinder, and the eighth air hole is communicated with the tenth air hole opening into the inner cavity of the cylinder through the third air passage arranged on the side wall of the cylinder.
[0010] Further, the number of the first air holes is one, the number of the second air holes is four, the number of the third air holes is one, the number of the fourth air holes is eight, and the number of the fifth air holes is four.
[0011] Further, the sixth air hole is located on the cylinder wall within the moving range of the valve sleeve, and the movement of the valve sleeve within the cylinder realizes the opening or closing of the sixth air hole.
[0012] Further, the tenth air hole is located on the cylinder wall within the moving range of the piston, and the movement of the piston within the cylinder realizes the opening or closing of the tenth air hole.
[0013] Further, the seventh air hole is an oblong hole.
[0014] Further, the ninth air hole is near the second annular convex part, and the ninth air hole is an oblong hole.
[0015] Further, both the major axis and the minor axis of the seventh air hole are smaller than those of the ninth air hole.
[0016] The beneficial effects of the present utility model are:
[0017] Through the design of the air holes on the cylinder sleeve and the cylinder wall in this technical solution, the air flow passes through the air hole on the rightmost side of the cylinder, blowing the buffer pad to move to the left. When it moves past the middle position of the cylinder, the air flow changes direction and enters from the left through the middle air hole, pushing the buffer pad to move to the right to achieve commutation. The theoretical switching speed reaches 13,000 times per minute. In this process, the air flow pushing the piston also changes accordingly and moves in the reverse direction along with the reciprocating movement of the buffer pad. The movement of the piston drives the engraving machine to vibrate regularly, forming a reciprocating impact force. The switching frequency of the commutation device increases, and the impact frequency and working efficiency of the engraving machine are also significantly improved. Description of the Drawings
[0018] Figure 1 It is an exploded view of the commutation device of the dynamic engraving machine of the present utility model.
[0019] Figure 2 It is a schematic diagram of the commutation mechanism of the present utility model.
[0020] Figure 3 It is a schematic diagram of the air chamber of the commutation mechanism of the present utility model.
[0021] Figure 4 It is a schematic diagram of the air flow direction of the commutation mechanism of the present utility model.
[0022] Figure 5 It is a side view of the cylinder liner.
[0023] Figure 6 It is a side view of the cylinder.
[0024] Figure 7 It is a perspective view of the cylinder of the present utility model.
[0025] Figure 8 It is a schematic diagram of the movement direction of the commutation mechanism of the present utility model.
[0026] Explanation of reference numerals in the drawings:
[0027] 1. Housing; 2. Compression spring; 3. O-ring; 4. O-ring; 5. Opening and closing pin bushing; 6. Rubber gasket; 7. Opening and closing pin; 8. Trigger block; 9. Trigger; 10. Outer housing of the housing; 11. Intake joint; 12. Buffer block; 13. Buffer pad; 14. Cylinder liner; 15. Valve sleeve; 16. Piston; 17. Cylinder; 18. Piston movement interval; 19. Valve sleeve movement interval; A1. First air hole; A2. Third air hole; A3. Sixth air hole; B1. Second air hole; C1. Fourth air hole; C2. Seventh air hole; C3. Ninth air hole; D1. Fifth air hole; D2. Eighth air hole; D3. Tenth air hole; O-R. Air chamber. Specific embodiments
[0028] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only exemplary and can only be used to explain and illustrate the technical solutions of the present utility model, and cannot be construed as a limitation of the technical solutions of the present utility model.
[0029] As Figure 1 described, the present application provides a pneumatic engraving machine commutation device, including a housing 1, a cylinder liner 14, a cylinder 17, and a commutation device assembly; the commutation device assembly includes a buffer assembly, a valve sleeve 15, and a piston 16; the buffer assembly is arranged inside the housing 1, the cylinder liner 14 is installed at the rear end of the cylinder 17, one end of the buffer assembly abuts against the cylinder liner, and the other end abuts against the housing; the valve sleeve 15 and the piston 16 are arranged in the space formed by the cylinder 17 and the cylinder liner 14.
[0030] Compressed air is connected through the air inlet joint 11. When the trigger 9 is pressed, the opening and closing pin 7 pushes related components such as the compression spring 2, the O-ring 3, and the O-ring 4 to move backward. The compressed air enters the housing 1 after passing through the opening and closing pin bushing 5, and enters the pneumatic engraving machine commutation device through the cylinder liner 14 and the cylinder 17. The commutation device is composed of a buffer block 12, a buffer pad 13, a valve sleeve 15, and a piston 16. The air flow passes through the hole on the rightmost side of the cylinder, blowing the buffer pad 13 to move to the left. When it moves past the middle position of the cylinder, the air flow changes direction and enters from the left through the middle hole, pushing the buffer pad to move to the right to achieve commutation. The theoretical switching speed reaches 13,000 times per minute. In this process, the air flow pushing the piston also changes accordingly and moves in the reverse direction along with the reciprocating movement of the buffer pad 13. The movement of the piston 16 drives the engraving machine to vibrate regularly, forming a reciprocating impact force. The higher the switching frequency of the commutation device, the greater the impact frequency of the engraving machine and the higher the working efficiency.
[0031] The buffer block of the commutation device is made of engineering plastic, and the buffer pad 13 is made of bakelite. Compared with metal materials, the weight is greatly reduced. Plastic has natural anti-friction properties, and the friction between the plastic valve body and the inner surface of the aluminum body is smaller than that between the past metal valve body and the aluminum body. The heat generation problem of the commutation device is improved, reducing unnecessary energy loss. Because the bakelite buffer pad is lighter than metal, it is easier to be blown by the air flow, and the air flow direction switching will be smoother, so the vibration of the engraving machine runs more smoothly. The volume between the cylinder head and the valve body has increased by 15%, and the air chambers on both sides of the valve plate have each increased by about 8% synchronously. Due to the increased air intake of the device, the impact force of the engraving machine is greater. Because the engraving machine often works in a humid environment, the commutation device is directly in contact with humid air, and the engraving machine often fails due to metal corrosion. After changing the main components of the commutation device to plastic parts, the corrosion failure problem can be effectively solved.
[0032] As Figures 2 to 8 shown, a first annular protrusion extending inward is provided in the inner cavity of the cylinder liner 14, and a first air hole A1 and a second air hole B1 are provided on the first annular protrusion. The high-pressure air flow passes through the trigger mechanism, first enters the air chamber O, and then passes through the first air hole A1 and the second air hole B1 on the cylinder liner 14. In this embodiment, the number of the first air holes A1 is one, and the number of the second air holes B1 is four.
[0033] A circular wall extending inward is provided near the right end of the inner cavity of the cylinder, and a third air hole A2, a fourth air hole C1, and a fifth air hole D1 are respectively provided on the circular wall. A second annular protrusion extending outward is provided on the outer wall of the cylinder; a seventh air hole C2 and an eighth air hole D2 are respectively provided on the cylinder wall between the second annular protrusion and the end close to the cylinder liner; a ninth air hole C3 and a tenth air hole D3 are respectively provided on the cylinder wall between the second annular protrusion and the end far from the cylinder liner.
[0034] The first air hole A1 communicates with the third air hole A2, and the second air hole B1 communicates with the fourth air hole C1 and the fifth air hole D1 simultaneously. In this application, the number of the third air holes is 1, the number of the fourth air holes C1 is 8, and the number of the fifth air holes D1 is 4.
[0035] Among them, the third air hole A2 communicates with the sixth air hole A3 opening in the inner cavity of the cylinder through the first air passage arranged on the side wall of the cylinder, the seventh air hole C2 communicates with the ninth air hole C3 opening in the inner cavity of the cylinder through the second air passage arranged on the side wall of the cylinder, and the eighth air hole D2 communicates with the tenth air hole D3 opening in the inner cavity of the cylinder through the third air passage arranged on the side wall of the cylinder.
[0036] In this application, the sixth air hole A3 is located on the cylinder wall within the movement range of the valve sleeve, and the movement of the valve sleeve in the cylinder realizes the opening or closing of the sixth air hole A3.
[0037] In this application, the tenth air hole D3 is located on the cylinder wall within the movement range of the piston, and the movement of the piston in the cylinder realizes the opening or closing of the tenth air hole D3.
[0038] In this application, the seventh air hole C2 is an oblong hole. The ninth air hole C3 is near the second annular convex part, and the ninth air hole C3 is an oblong hole. Both the major axis and the minor axis of the seventh air hole C2 are smaller than those of the ninth air hole C3.
[0039] In this application, the high-pressure air flow passes through the trigger mechanism, first enters the air chamber "O", then passes through the second air hole B1 and the first air hole A1 on the cylinder sleeve 14, and is dispersed into the fourth air hole C1, the fifth air hole D1, the third air hole A2, and the seventh air hole C2, the ninth air hole C3, the eighth air hole D2, the tenth air hole D3, and the sixth air hole A3 respectively connected thereto, and finally enters the air chambers "P", "Q", "R" to blow the valve sleeve 15 and the piston 16 to reciprocate within the interval. When the valve sleeve 15 is pushed by the air flow to reach the other extreme position, the relative sizes of the air flows passing through the seventh air hole C2, the ninth air hole C3, and the eighth air hole D2 change, and the sizes of the air flows passing through the second air hole B1, the tenth air hole D3, and the sixth air hole A3 also change. Within the movement interval of the valve sleeve 15, with the pressure changes in the "Q" and "R" air chambers, it moves repeatedly, causing the device to generate high-frequency oscillations.
[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A pneumatic engraving machine commutation device, comprising a housing, a cylinder liner, a cylinder, and a commutation device assembly; characterized in that, The commutation device assembly includes a buffer assembly, a valve sleeve and a piston; the buffer assembly is arranged in the housing, the cylinder sleeve is installed at the rear end of the cylinder, one end of the buffer assembly abuts against the cylinder sleeve, and the other end abuts against the housing; the valve sleeve and the piston are arranged in the space formed by the cylinder and the cylinder sleeve; A first annular convex portion extending inwards is arranged in the inner cavity of the cylinder sleeve, and a first air hole and a second air hole are arranged on the first annular convex portion; A circular wall extending inwards is arranged near the right end of the inner cavity of the cylinder, a third air hole, a fourth air hole and a fifth air hole are respectively arranged on the circular wall, and a second annular convex portion extending outwards is arranged on the outer wall of the cylinder; a seventh air hole and an eighth air hole are respectively arranged on the cylinder wall between the second annular convex portion and the end near the cylinder sleeve; a ninth air hole and a tenth air hole are respectively arranged on the cylinder wall between the second annular convex portion and the end far from the cylinder sleeve; The first air hole is communicated with the third air hole, and the second air hole is simultaneously communicated with the fourth air hole and the fifth air hole; Among them, the third air hole is communicated with a sixth air hole opening into the inner cavity of the cylinder through a first air passage arranged on the side wall of the cylinder, the seventh air hole is communicated with the ninth air hole opening into the inner cavity of the cylinder through a second air passage arranged on the side wall of the cylinder, and the eighth air hole is communicated with the tenth air hole opening into the inner cavity of the cylinder through a third air passage arranged on the side wall of the cylinder.
2. The pneumatic engraving machine commutation device according to claim 1, characterized in that, The number of the first air holes is one, the number of the second air holes is four, the number of the third air holes is one, the number of the fourth air holes is eight, and the number of the fifth air holes is four.
3. The pneumatic engraving machine commutation device according to claim 1, characterized in that, The sixth air hole is located on the cylinder wall within the movement range of the valve sleeve, and the movement of the valve sleeve in the cylinder realizes the opening or closing of the sixth air hole.
4. The pneumatic engraving machine commutation device according to claim 1, characterized in that, The tenth air hole is located on the cylinder wall within the movement range of the piston, and the movement of the piston in the cylinder realizes the opening or closing of the tenth air hole.
5. The pneumatic engraving machine commutation device according to claim 1, characterized in that, The seventh air hole is an oblong hole.
6. The pneumatic engraving machine commutation device according to claim 5, characterized in that, The ninth air hole is near the second annular convex portion, and the ninth air hole is an oblong hole.
7. The pneumatic engraving machine commutation device according to claim 6, characterized in that, The major axis and minor axis of the seventh air hole are both smaller than the major axis and minor axis of the ninth air hole.