Pneumatic tool bit

Abstract

The pneumatic tool bit comprises a tool cylinder, an air pipe seat is installed at the upper end of the tool cylinder, an air hole groove is formed in the air pipe seat, an air return hole is formed in the air hole groove, sound insulation cotton is arranged in the air hole groove, an air vent is formed in the air pipe seat, the air vent is communicated with an air pipe connector, and an upper cover is detachably connected to the air pipe seat. The upper cover is used for protecting the interior of the air pipe seat; by means of the mode, noise generated during operation can be reduced through the sound insulation cotton, and the sound insulation cotton is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating cutting knives, in particular to a pneumatic cutter head. Background Art

[0002] The cutter head is an indispensable device for the cutting machine to realize the action of cutting products. Most of the existing cutter heads are driven by compressed gas. Pneumatic cutter heads are low-cost and relatively safe.

[0003] A conventional pneumatic knife includes an air intake assembly, which includes an exhaust cap and an air pipe joint, an air intake shaft and an air intake guide shaft connected in sequence from top to bottom. The exhaust cap is threadedly connected to the upper end of the outer knife barrel, the air intake shaft passes through the center position of the exhaust cap, the lower end of the air intake guide shaft passes through the clamping cover and is connected to the first air intake hole of the air intake block, a plurality of second exhaust holes are arranged on the periphery of the exhaust cap, and a plurality of silencer cotton rings are arranged on the outer side of the air intake shaft, which can silence and reduce the noise of the exhaust gas.

[0004] In practice, the exhaust cap and the outer barrel are fixed with thread glue during assembly to prevent the air intake assembly from being separated from the outer barrel due to vibration during use. However, the compressed air used by the pneumatic cutter head inevitably contains dust. Therefore, after a long period of use, the silencer cotton ring will contain a lot of dust and other impurities. At this time, a new silencer cotton ring needs to be replaced. At this time, the user cannot open the exhaust cap and can only return the machine to the factory for maintenance and replacement of the silencer cotton ring. This increases the cost of use and affects production efficiency. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a pneumatic cutter head, which can reduce noise during operation through sound insulation cotton and is easy to replace the sound insulation cotton.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a pneumatic cutter head, including: a cutter cylinder, a trachea seat is installed on the upper end of the cutter cylinder, an air hole groove is opened on the trachea seat, an air return hole is opened in the air hole groove, sound insulation cotton is arranged in the air hole groove, a vent is opened on the trachea seat, the vent is connected to a trachea joint, and an upper cover is detachably connected to the trachea seat, and the upper cover is used to provide protection for the inside of the trachea seat.

[0007] Preferably, the vent is connected to an air intake block, and a first sealing groove and a second sealing groove cooperating with the air intake block are formed on the inner wall of the vent, and a first sealing ring and a second sealing ring cooperating with the air intake block are both provided in the first sealing groove and the second sealing groove.

[0008] Preferably, the air intake block comprises a first air intake portion and a first connecting portion, the first air intake portion and the first connecting portion are integrally formed, and the first air intake portion penetrates into the air vent and is connected to the air vent.

[0009] Preferably, an upper pad is provided on the lower side of the connecting part of the air intake block, a middle plate is provided on the lower side of the upper pad, a valve core is provided in the middle plate, a cylinder head is provided on the lower side of the middle plate, a cylinder is provided on the lower side of the cylinder head, a lower fixed seat is provided on the lower side of the cylinder, a piston is slidably fitted in the cylinder, the piston is connected to a plug rod, the plug rod is connected to a tool clamp, and the tool clamp is used to install a blade.

[0010] Preferably, an inner shell is provided in the knife barrel, the first connecting part of the air intake block, the upper pad, the middle plate, the valve core, the cylinder cover, the cylinder and the piston are all provided in the inner shell, and the upper end of the inner shell is connected with a locking nut.

[0011] Preferably, the lower fixed seat includes a second connecting portion and a second guiding portion, the second connecting portion is connected to the lower side of the cylinder, the plug rod is slidingly engaged with the second guiding portion, the second guiding portion provides guidance for the reciprocating motion of the plug rod, the second connecting portion is in the inner shell, and the second guiding portion extends out of the inner shell.

[0012] Preferably, a first damping spring is sleeved on the lower fixed seat, and two ends of the first damping spring respectively abut against the lower side of the lower fixed seat and the inside of the knife cylinder.

[0013] Preferably, the second guide portion of the lower fixing seat is provided with a third sealing groove, and a third sealing ring cooperating with the plug rod is arranged in the third sealing groove.

[0014] Preferably, a second damping spring is provided between the air pipe seat and the air intake block.

[0015] Preferably, a shaft sleeve is provided at the lower end of the knife cylinder, and the plug rod is slidably matched with the shaft sleeve, and the shaft sleeve is used to guide the reciprocating motion of the plug rod.

[0016] The beneficial effects of the utility model are:

[0017] 1. By opening a return air hole on the trachea seat for the airflow to pass through when it rises, and placing sound insulation cotton at the return air hole, the sound insulation cotton can effectively reduce the noise caused by the direct impact of the airflow. And the detachable connection between the trachea seat and the knife barrel makes it easy to replace the sound insulation cotton and maintain the pneumatic knife head;

[0018] 2. The vibration of the pneumatic cutter head during operation is further reduced by arranging the second damping spring and the first damping spring at the upper and lower ends of the cutter barrel respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 yes Figure 1 A magnified schematic diagram of the middle part;

[0021] Figure 3 It is a top view of the tracheal seat of the utility model;

[0022] Figure 4 It is a top view of the sound insulation cotton of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the tracheal seat of the utility model;

[0024] Figure 6 It is a top view of the upper cover of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the air intake block of the utility model;

[0026] Figure 8 It is a structural schematic diagram of the lower fixing seat of the utility model.

[0027] The markings of the components in the accompanying drawings are as follows:

[0028] 1. Knife barrel; 2. Trachea seat; 3. Air hole groove; 4. Return air hole; 5. Sound insulation cotton; 6. Air vent; 7. Trachea joint; 8. First connecting threaded hole; 9. Upper cover; 10. First mounting through hole; 11. Inlet block; 12. First sealing groove; 13. Second sealing groove; 14. First air inlet part; 15. First connecting part; 16. Upper pad; 17. Middle plate; 18. Valve core; 19. Cylinder head; 20. Cylinder; 21. Lower fixed seat; 22. Piston; 23. Plug rod; 24. Knife clamp; 25. Blade; 26. Inner shell; 27. Locking nut; 28. Second connecting part; 29. ​​Second guide part; 30. First damping spring; 31. Third sealing groove; 33. Second damping spring; 34. Bushing; 35. Knife sleeve. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0035] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0036] Example:

[0037] refer to Figure 1-Figure 6 A pneumatic cutter head includes: a cutter barrel 1, the upper end of the cutter barrel 1 is threadedly connected to a trachea seat 2, the trachea seat 2 is provided with an air hole groove 3, the air return hole 4 is provided in the air hole groove 3, sound insulation cotton 5 is arranged in the air hole groove 3, the sound insulation cotton 5 is laid on the air return hole 4, the trachea seat 2 is provided with an air vent 6, the air vent 6 is connected to a trachea joint 7, the trachea joint 7 is connected to the air source, so that compressed gas enters through the trachea seat 2, and the trachea seat 2 is detachably connected to an upper cover 9, and the upper cover 9 is used to provide protection for the inside of the trachea seat 2. When the sound insulation cotton 5 needs to be replaced, the upper cover 9 only needs to be removed to separate the upper cover 9 from the trachea seat 2, so that the sound insulation cotton 5 in the trachea seat 2 can be easily and conveniently replaced.

[0038] refer to Figure 1-Figure 6 One of the embodiments of the detachable connection between the upper cover 9 and the tracheal seat 2 is that a first connecting threaded hole 8 is provided on the tracheal seat 2, and an upper cover 9 is provided on the tracheal seat 2. A first mounting through hole 10 corresponding to the first connecting threaded hole 8 is provided on the upper cover 9, so that the first connecting threaded hole 8 on the tracheal seat 2 is connected to the upper cover 9 by passing through the first mounting through hole 10 with a screw, thereby covering the tracheal seat 2 to provide protection for the inside of the tracheal seat 2. When the sound insulation cotton 5 needs to be replaced, the upper cover 9 can be separated from the tracheal seat 2 by simply loosening the screws on the upper cover 9, thereby easily and conveniently replacing the sound insulation cotton 5 in the tracheal seat 2.

[0039] Another embodiment of the detachable connection between the upper cover 9 and the trachea seat 2 is that the upper cover 9 is threadedly connected to the trachea connector 7 .

[0040] refer to Figure 1-Figure 7The air vent 6 is connected to the air inlet block 11, and the inner wall of the air vent 6 is provided with a first sealing groove 12 and a second sealing groove 13 which match the air inlet block 11. The first sealing groove 12 and the second sealing groove 13 are both provided with a first sealing ring and a second sealing ring which match the air inlet block 11, thereby further ensuring that the downward airflow which causes the blade 25 to move downward can move downward more concentratedly, reducing the dispersion and leakage of the airflow, and providing a guarantee for the high frequency of the pneumatic cutter head.

[0041] refer to Figure 1-Figure 7 The air intake block 11 includes a first air intake portion 14 and a first connecting portion 15, and the first air intake portion 14 and the first connecting portion 15 are integrally formed. The first air intake portion 14 penetrates into the air vent 6 and is connected with the air vent 6, so that the first air intake portion 14 of the air intake block 11 penetrates into the air vent 6, and the downward airflow further goes downward.

[0042] refer to Figure 1 , Figure 2 , Figure 7 , Figure 8 An upper pad 16 is installed at the lower side of the connection part of the air intake block 11, a middle plate 17 is installed at the lower side of the upper pad 16, a valve core 18 is slidably fitted in the middle plate 17, a cylinder head 19 is installed at the lower side of the middle plate 17, a cylinder 20 is installed at the lower side of the cylinder head 19, a lower fixed seat 21 is installed at the lower side of the cylinder 20, a piston 22 is slidably fitted in the cylinder 20, the piston 22 is connected to a plug rod 23, the plug rod 23 is connected to a tool clamp 24, and the tool clamp 24 is used to install a blade 25; in order to stabilize the blade 25, a tool sleeve 35 can be bolted to the lower end of the knife barrel 1, and the tool clamp 24 and the tool sleeve 35 are slidably fitted;

[0043] Thus, the reciprocating motion of the piston 22, that is, the reciprocating motion of the blade 25, is achieved by the mutual cooperation among the air pipe seat 2, the air intake block 11, the upper pad 16, the middle plate 17, the valve core 18, the cylinder head 19, the cylinder 20, the lower fixed seat 21, and the piston 22 utilizing the pressure difference of the airflow.

[0044] refer to Figure 1-Figure 7 In order to make the structure more compact and more stable, an inner shell 26 is installed in the knife barrel 1, and the first connecting part 15, the upper pad 16, the middle plate 17, the valve core 18, the cylinder head 19, the cylinder 20, and the piston 22 of the air intake block 11 are all installed in the inner shell 26, so that these parts become a whole, increasing the overall stability, and the upper end of the inner shell 26 is connected with a locking nut 27, so that these parts are locked in the inner shell 26 by the locking nut 27, and the middle of the locking nut 27 is hollow, so that the first air intake part 14 of the air intake block 11 extends out of the locking nut 27 and is connected to the trachea seat 2.

[0045] refer to Figure 1 , Figure 2 and Figure 8The lower fixing seat 21 includes an integrally formed second connecting portion 28 and a second guiding portion 29. The second connecting portion 28 is connected to the lower side of the cylinder 20. The plug rod 23 is slidably matched with the second guiding portion 29, so that the second guiding portion 29 provides guidance for the reciprocating motion of the plug rod 23. The second connecting portion 28 is in the inner shell 26, and the second guiding portion 29 extends out of the inner shell 26.

[0046] A first damping spring 30 is sleeved on the outer edge of the second guide portion 29 of the lower fixed seat 21 extending out of the inner shell 26, and two ends of the first damping spring 30 respectively abut against the lower side of the lower fixed seat 21 and the inside of the knife barrel 1, thereby reducing the vibration of the pneumatic cutter head during operation through the first damping spring 30.

[0047] A second damping spring 33 is arranged between the trachea seat 2 and the air intake block 11, so that two ends of the second damping spring 33 respectively abut against the lower side of the trachea seat 2 and the upper side of the locking nut 27, which can further reduce the vibration of the pneumatic cutter head.

[0048] refer to Figure 1 , Figure 2 and Figure 8 In order to further prevent the airflow from flowing into the gap between the plug rod 23 and the lower fixed seat 21, thereby avoiding the problem that the airflow does not fully or more enter the return air channel to flow, and further improve the frequency of the pneumatic cutter head, the second guide portion 29 of the lower fixed seat 21 is provided with a third sealing groove 31, and a third sealing ring matching the plug rod 23 is installed in the third sealing groove 31, and the plug rod 23 is in contact with the third sealing ring.

[0049] refer to Figure 1 In order to make the plug rod 23 reciprocate more smoothly on the knife cylinder 1 and to further ensure the accuracy and stability of the position of the blade 25, a sleeve 34 is installed at the lower end of the knife cylinder 1. The sleeve 34 can be glued to the knife cylinder 1 by glue, and the plug rod 23 slides with the sleeve 34. The sleeve 34 is used to guide the reciprocating motion of the plug rod 23.

[0050] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pneumatic cutter head, characterized in that: include: A knife barrel (1), wherein a trachea seat (2) is installed at the upper end of the knife barrel (1), an air hole groove (3) is provided on the trachea seat (2), an air return hole (4) is provided in the air hole groove (3), a sound insulation cotton (5) is arranged in the air hole groove (3), an air vent (6) is provided on the trachea seat (2), the air vent (6) is connected to a trachea joint (7), and an upper cover (9) is detachably connected to the trachea seat (2), and the upper cover (9) is used to provide protection for the inside of the trachea seat (2).

2. A pneumatic cutter head according to claim 1, characterized in that: The vent (6) is connected to an air intake block (11), and the inner wall of the vent (6) is provided with a first sealing groove (12) and a second sealing groove (13) that match the air intake block (11), and the first sealing groove (12) and the second sealing groove (13) are both provided with a first sealing ring and a second sealing ring that match the air intake block (11).

3. A pneumatic cutter head according to claim 2, characterized in that: The air intake block (11) comprises a first air intake portion (14) and a first connecting portion (15); the first air intake portion (14) and the first connecting portion (15) are integrally formed; the first air intake portion (14) penetrates into the air vent (6) and is in communication with the air vent (6).

4. The pneumatic cutter head according to claim 2, characterized in that: An upper pad (16) is provided on the lower side of the connection part of the air intake block (11), a middle plate (17) is provided on the lower side of the upper pad (16), a valve core (18) is provided in the middle plate (17), a cylinder cover (19) is provided on the lower side of the middle plate (17), a cylinder (20) is provided on the lower side of the cylinder cover (19), a lower fixed seat (21) is provided on the lower side of the cylinder (20), a piston (22) is slidably fitted in the cylinder (20), the piston (22) is connected to a plug rod (23), the plug rod (23) is connected to a tool clamp (24), and the tool clamp (24) is used to install a blade (25).

5. A pneumatic cutter head according to claim 4, characterized in that: An inner shell (26) is arranged in the knife barrel (1), and the first connecting portion (15), the upper pad (16), the middle plate (17), the valve core (18), the cylinder cover (19), the cylinder (20), and the piston (22) of the air intake block (11) are all arranged in the inner shell (26), and the upper end of the inner shell (26) is connected to a locking nut (27).

6. The pneumatic cutter head according to claim 5, characterized in that: The lower fixed seat (21) comprises a second connecting portion (28) and a second guiding portion (29), wherein the second connecting portion (28) is connected to the lower side of the cylinder (20), the plug rod (23) is slidably matched with the second guiding portion (29), the second guiding portion (29) provides guidance for the reciprocating motion of the plug rod (23), the second connecting portion (28) is located in the inner shell (26), and the second guiding portion (29) extends out of the inner shell (26).

7. A pneumatic cutter head according to any one of claims 4 or 6, characterized in that: A first damping spring (30) is sleeved on the lower fixed seat (21), and two ends of the first damping spring (30) respectively abut against the lower side of the lower fixed seat (21) and the interior of the knife cylinder (1).

8. The pneumatic cutter head according to claim 6, characterized in that: The second guide portion (29) of the lower fixing seat (21) is provided with a third sealing groove (31), and a third sealing ring matching the plug rod (23) is arranged in the third sealing groove (31).

9. A pneumatic cutter head according to claim 2 or 3, characterized in that: A second damping spring (33) is arranged between the air pipe seat (2) and the air intake block (11).

10. The pneumatic cutter head according to claim 4, characterized in that: A shaft sleeve (34) is provided at the lower end of the knife cylinder (1), the plug rod (23) and the shaft sleeve (34) are slidably matched, and the shaft sleeve (34) is used to guide the reciprocating motion of the plug rod (23).

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