Silencing device of band sawing machine

Abstract

The utility model provides a silencing device of a band sawing machine. The silencing device comprises a first silencing pipe and a second silencing pipe which are arranged on the outer side of a saw blade in a sleeving mode. The first hush pipe is fixedly installed on the band sawing machine, and the second hush pipe is in sliding connection with the first hush pipe. The silencing linings are fixedly mounted on the inner walls of the first silencing pipe and the second silencing pipe; the pushing part is installed in an inner cavity of the first silencing pipe and / or the second silencing pipe and used for pushing the second silencing pipe to abut against the table top of the machining table. The guide inclined face is arranged on the side wall of the bottom of the second silencing pipe, a workpiece to be machined abuts against the guide inclined face to be used for lifting the second silencing pipe upwards, noise generated by vibration of a saw blade is absorbed by the silencing linings in the first silencing pipe and the second silencing pipe, and the loudness of the noise of the band sawing machine is reduced. The pushing piece applies downward pressure to the second silencing pipe, at the moment, the second silencing pipe pushes the workpiece which is cut into two parts by the saw blade to the machining table, the risk that the cut workpiece jumps on the machining table is reduced, and therefore noise is reduced.

Description

Technical Field

[0001] This application relates to the field of band saws, and more particularly to a noise reduction device for band saws. Background Technology

[0002] A vertical band saw is a device that uses a band saw blade as a cutting tool. It is driven by a motor to rotate the saw blade at high speed and move it up and down in a vertical direction to cut the workpiece.

[0003] like Figure 1 As shown, the vertical band saw also includes a processing table 10. The saw blade moves up and down through the processing table 10. During operation, the workpiece is pushed onto the high-speed rotating saw blade 101 on the processing table 10, thereby completing the cutting of the workpiece. When the saw blade 101 and the workpiece come into contact, the saw blade 101 vibrates at a high frequency in the air, generating a lot of noise. After the workpiece is split in two by the saw blade 101, the workpiece vibrates and collides with the processing table, which also generates a lot of noise.

[0004] Therefore, designing a noise reduction device for vertical band saws has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This application provides a noise reduction device for a band saw, which at least solves the above-mentioned technical problems existing in the prior art.

[0006] A noise reduction device for a band saw is provided, which is installed on the band saw and includes a first noise reduction pipe and a second noise reduction pipe both sleeved on the outside of the saw blade;

[0007] The first silencer is fixedly installed on the housing of the band saw, and the second silencer is slidably connected to the first silencer along the axial direction of the first silencer.

[0008] The sound-absorbing liner is fixedly installed on the inner wall of the first and second silencers.

[0009] A pusher is installed in the inner cavity of the first silencer tube and / or the second silencer tube to push the second silencer tube to abut against the table surface of the processing table.

[0010] A guide slope is provided on the bottom side wall of the second muffler. The workpiece to be processed abuts against the guide slope to lift the second muffler upward.

[0011] In one embodiment, the sound-absorbing liner includes a first sound-absorbing liner and a second sound-absorbing liner, wherein the first sound-absorbing liner is fixedly installed on the inner wall of the first sound-absorbing pipe, and the second sound-absorbing liner is fixedly installed on the inner wall of the second sound-absorbing pipe.

[0012] In an embodiment, the first muffler has a first mounting hole arranged axially along the first muffler, the second muffler has a second mounting hole arranged axially along the second muffler, the first muffler is rotatably connected to the second muffler, the first muffler is provided with a first blocking plate for blocking the second mounting hole, the second muffler is provided with a second blocking plate for blocking the first mounting hole, the first blocking plate and the second blocking plate block the second mounting hole and the first mounting hole respectively during workpiece processing, and the first mounting hole and the second mounting hole are opened during saw blade installation.

[0013] In an embodiment, the first muffler has a clamping groove arranged axially along the first muffler on the inner wall of the first muffler, and the first blocking plate is inserted into the clamping groove and is in sliding connection with the inner wall of the clamping groove.

[0014] In an embodiment, the bottom of the first blocking plate is fixedly provided with a lifting plate extending radially out of the second muffler along the second muffler, the lifting plate is provided with a locking groove, the bottom peripheral wall of the second muffler is fixedly provided with a clamping block, and the clamping block is rotated into the locking groove to lock the second muffler and the first blocking plate during workpiece processing, and the clamping block is rotated out of the locking groove during saw blade installation.

[0015] In an embodiment, the pushing piece is a spring, one end of the spring is fixedly connected to the inner wall of the first muffler, and the other end of the spring is fixedly connected to the first blocking plate.

[0016] In an embodiment, the inner wall of the first muffler is provided with a positioning plate extending radially along the first muffler, the top of the first blocking plate is fixedly provided with an extension plate extending radially along the first muffler, one end of the spring is fixed to the positioning plate, and the other end of the spring is fixed to the extension plate.

[0017] In an embodiment, the extension plate is provided with a through hole, the positioning plate is fixedly provided with a guide rod arranged axially along the first muffler, the guide rod extends downward through the through hole, the bottom of the guide rod is threadedly connected with a positioning bolt, and the bolt head of the positioning bolt has a diameter larger than that of the through hole.

[0018] In an embodiment, the outer wall of the first muffler is provided with a guide groove arranged axially along the first muffler, and the second muffler is fixedly provided with a buckling piece, the buckling piece is buckled in the guide groove to limit the relative circumferential rotation between the second muffler and the first muffler during workpiece processing.

[0019] In an embodiment, the buckling piece comprises a mounting groove, a buckling block, and a compression spring, the mounting groove is arranged on the inner wall of the second muffler, the outer wall of the buckling block is in sliding connection with the inner wall of the mounting groove, the compression spring is arranged in the mounting groove, one end of the compression spring is in abutment with the inner wall of the mounting groove, the other end of the compression spring is in abutment with the buckling block, and the buckling block and the guide groove each have an isosceles trapezoidal cross section.

[0020] Compared with the prior art, the sound attenuation device of the band saw machine has the following beneficial effects:

[0021] Since the sound attenuation inner lining is arranged in the inner wall of the first sound attenuation pipe and the second sound attenuation pipe, and the first sound attenuation pipe and the second sound attenuation pipe are sleeved outside the saw blade, when the saw blade is in contact with the workpiece to saw the workpiece, the noise generated by the vibration of the saw blade is absorbed by the sound attenuation inner lining in the first sound attenuation pipe and the second sound attenuation pipe, thereby reducing the loudness of the noise of the band saw machine; when the workpiece pushes the second sound attenuation pipe upward, at this time, the pushing piece applies a downward pressure to the second sound attenuation pipe, and at this time, the second sound attenuation pipe pushes the workpiece cut in half by the saw blade on the machining table, thereby reducing the risk of the workpiece jumping on the machining table after cutting, and weakening the noise.

[0022] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the application, nor is it used to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which:

[0024] In the drawings, identical or corresponding reference numerals indicate identical or corresponding parts.

[0025] Figure 1 A structural schematic diagram of the prior art is shown;

[0026] Figure 2 A structural schematic diagram of the workpiece in the unprocessed state of the application is shown;

[0027] Figure 3 A structural schematic diagram of the workpiece in the processed state of the application is shown;

[0028] Figure 4 A structural schematic diagram of the saw blade in the installed state of the application is shown;

[0029] Figure 5 A partial structural schematic diagram of the application is shown;

[0030] Figure 6 An unfolded schematic diagram of the first sound attenuation pipe of the application is shown;

[0031] Figure 7 A structural schematic diagram of the first blocking plate of the application is shown;

[0032] Figure 8The structural schematic diagram of the second muffling pipe of the present application is shown.

[0033] Figure 9 The first angle sectional view of the present application is shown.

[0034] Figure 10 The second angle sectional view of the present application is shown.

[0035] Figure 11 The partial structural sectional view of the present application is shown.

[0036] Figure 12 The structural schematic diagram of the clamping block and the locking groove of the present application is shown.

[0037] Explanation of the figure labels:

[0038] 10, processing table; 101, saw blade;

[0039] 1, first muffling pipe; 11, first mounting port; 12, clamping groove; 13, positioning plate; 14, guide rod; 141, positioning bolt; 15, guide groove;

[0040] 2, second muffling pipe; 21, second mounting port; 22, guide inclined surface; 23, second blocking plate; 24, clamping block;

[0041] 3, muffling lining; 31, first muffling lining; 32, second muffling lining;

[0042] 4, pushing piece;

[0043] 5, first blocking plate; 51, extension plate; 511, perforation; 52, lifting plate; 53, locking groove; 54, guide surface;

[0044] 6, buckling piece; 61, mounting groove; 62, buckling block; 63, compression spring. DETAILED DESCRIPTION

[0045] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] As Figure 2As shown, the band saw machine comprises a machining table 10 and a high-speed rotating saw blade 101, wherein the outer side of the saw blade 101 above the machining table 10 for workpiece sawing is sleeved with a first muffling pipe 1 and a second muffling pipe 2, wherein the first muffling pipe 1 is fixedly installed on the shell of the band saw machine, the second muffling pipe 2 is sleeved on the outer side of the first muffling pipe 1, and the second muffling pipe 2 is axially slidably connected with the first muffling pipe 1.

[0047] Specifically, as shown in Figure 6 , Figure 8 and Figure 10 , the inner walls of the first muffling pipe 1 and the second muffling pipe 2 are both installed with a muffling lining 3.

[0048] When the saw blade 101 saws the workpiece, the saw blade 101 will produce high-frequency vibration, at this time, the saw blade 101 drives the air vibration, thereby producing noise; since the saw blade 101 is sleeved in the first muffling pipe 1 and the second muffling pipe 2, the muffling lining 3 can absorb the noise generated by the saw blade 101, thereby achieving the purpose of muffling.

[0049] Specifically, as shown in Figure 3 , Figure 6 and Figure 9 , it further comprises a pushing piece 4, wherein the pushing piece 4 is installed in the inner cavity of the first muffling pipe 1 and / or the second muffling pipe 2, wherein one end of the pushing piece 4 is fixedly connected with the first muffling pipe 1, and the other end of the pushing piece 4 is connected with the inner cavity of the second muffling pipe 2, the second muffling pipe 2 is pushed downward by the pushing piece 4, so that the bottom of the second muffling pipe 2 abuts against the table top of the machining table 10.

[0050] As shown in Figure 3 and Figure 8 , a guide inclined surface 22 is arranged on the side wall of the bottom of the second muffling pipe 2, wherein the guide inclined surface 22 forms an included angle with the table top of the machining table 10.

[0051] When the workpiece is pushed along the machining table 10 to the saw blade 101, the workpiece first contacts the guide inclined surface 22, and when the workpiece continues to move forward, as shown in Figure 3 , the second muffling pipe 2 is lifted upward and slides axially along the first muffling pipe 1, at this time, the sawing position of the saw blade 101 and the workpiece is located at the opening position of the bottom of the second muffling pipe 2, and the rest of the saw blade 101 is located inside the first muffling pipe 1 and the second muffling pipe 2; when the workpiece is sawed, the second muffling pipe 2 slides upward, thereby exposing the saw blade 101 at the bottom, and the existence of the second muffling pipe 2 does not affect the sawing of the workpiece.

[0052] In the use process of the vertical band sawing machine, the saw blade 101 needs to be replaced. The conventional first muffling pipe 1 and the second muffling pipe 2 are hollow pipe structures. Since the saw blade 101 is a closed ring, the saw blade 101 cannot pass through the first muffling pipe 1 and the second muffling pipe 2, which is inconvenient for the installation of the saw blade 101.

[0053] In the embodiment, the structure of the first muffling pipe 1 and the second muffling pipe 2 is adjusted to solve the problem of the installation of the saw blade 101, as shown in Figure 6 and Figure 8 The side wall of the first muffling pipe 1 is provided with a first installation opening 11 arranged along the axial direction of the first muffling pipe 1, and the side wall of the second muffling pipe 2 is provided with a second installation opening 21 arranged along the axial direction of the second muffling pipe 2, as shown in Figure 4 When the saw blade 101 is installed, the second muffling pipe 2 is rotated, so that the first installation opening 11 and the second installation opening 21 are on the same straight line. At this time, the saw blade 101 can be installed in the inner cavities of the first muffling pipe 1 and the second muffling pipe 2.

[0054] Although the first installation opening 11 and the second installation opening 21 are respectively arranged on the first muffling pipe 1 and the second muffling pipe 2, the arrangement of the installation openings facilitates the installation of the saw blade 101, but the existence of the installation openings affects the muffling effect of the first muffling pipe 1 and the second muffling pipe 2. Therefore, as shown in Figure 6 The first muffling pipe 1 is provided with a first blocking plate 5 for blocking the second installation opening 21, as shown in Figure 8 The second muffling pipe 2 is provided with a second blocking plate 23 for blocking the first installation opening 11; when the installation of the saw blade 101 is completed, the second muffling pipe 2 is rotated, so that the second blocking plate 23 on the second muffling pipe 2 is aligned with the first installation opening 11, and the first blocking plate 5 on the first muffling pipe 1 is aligned with the second installation opening 21. The first installation opening 11 and the second installation opening 21 are blocked, thereby improving the muffling effect of the first muffling pipe 1 and the second muffling pipe 2.

[0055] Specifically, in the embodiment, as shown in Figure 6 , Figure 8 and Figure 10 The muffling inner liner 3 includes a first muffling inner liner 31 and a second muffling inner liner 32, wherein the first muffling inner liner 31 is fixedly installed on the inner wall of the first muffling pipe 1, and the second muffling inner liner 32 is fixedly installed on the inner wall of the second muffling pipe 2.

[0056] As shown in Figure 6 and Figure 9 The pushing piece 4 is a spring, wherein one end of the spring is fixed on the inner wall of the first muffling pipe 1, and the other end of the spring is fixedly installed on the first blocking plate 5.

[0057] Specifically, as shown in Figure 6 andFigure 10 As shown in the drawings, the inner wall of the first muffling pipe 1 is provided with a clamping groove 12 arranged along the axial direction of the first muffling pipe 1, wherein the first blocking plate 5 is inserted into the clamping groove 12, and the side wall of the first blocking plate 5 is in sliding connection with the inner wall of the clamping groove 12.

[0058] As shown in the drawings, the bottom of the first blocking plate 5 is fixedly provided with a lifting plate 52 extending radially out of the second muffling pipe 2, wherein the lifting plate 52 is provided with a locking groove 53, and the outer wall of the bottom of the second muffling pipe 2 is fixedly provided with a clamping block 24, and during workpiece machining, the clamping block 24 on the second muffling pipe 2 is rotated into the locking groove 53, thereby fixing the second muffling pipe 2 with the first blocking plate 5, so that the second muffling pipe 2 and the first blocking plate 5 can be lifted or lowered synchronously. Figure 7 Figure 12 As shown in the drawings, the bottom of the first blocking plate 5 is fixedly provided with a lifting plate 52 extending radially out of the second muffling pipe 2, wherein the lifting plate 52 is provided with a locking groove 53, and the outer wall of the bottom of the second muffling pipe 2 is fixedly provided with a clamping block 24, and during workpiece machining, the clamping block 24 on the second muffling pipe 2 is rotated into the locking groove 53, thereby fixing the second muffling pipe 2 with the first blocking plate 5, so that the second muffling pipe 2 and the first blocking plate 5 can be lifted or lowered synchronously.

[0059] When the saw blade 101 is installed, the clamping block 24 is rotated out of the locking groove 53, thereby releasing the fixation of the first blocking plate 5 with the second muffling pipe 2.

[0060] In order to enable the first blocking plate 5 to stably slide along the axial direction of the first muffling pipe 1, in the present embodiment, as shown in the drawings, the inner wall of the first muffling pipe 1 is fixedly provided with a positioning plate 13 extending radially along the first muffling pipe 1, and the top of the first blocking plate 5 is fixedly provided with an extension plate 51 extending radially along the first muffling pipe 1, wherein the extension plate 51 is provided with a through hole 511, and the positioning plate 13 is fixedly provided with a guide rod 14 arranged along the axial direction of the first muffling pipe 1, wherein the guide rod 14 extends vertically downward through the through hole 511, and further comprising a positioning bolt 141, wherein the positioning bolt 141 is in threaded connection with the bottom of the guide rod 14, and the diameter of the bolt head of the positioning bolt 141 is greater than the diameter of the through hole 511, thereby preventing the first blocking plate 5 from moving out of the clamping groove 12. Figure 6 Figure 9 In order to enable the first blocking plate 5 to stably slide along the axial direction of the first muffling pipe 1, in the present embodiment, as shown in the drawings, the inner wall of the first muffling pipe 1 is fixedly provided with a positioning plate 13 extending radially along the first muffling pipe 1, and the top of the first blocking plate 5 is fixedly provided with an extension plate 51 extending radially along the first muffling pipe 1, wherein the extension plate 51 is provided with a through hole 511, and the positioning plate 13 is fixedly provided with a guide rod 14 arranged along the axial direction of the first muffling pipe 1, wherein the guide rod 14 extends vertically downward through the through hole 511, and further comprising a positioning bolt 141, wherein the positioning bolt 141 is in threaded connection with the bottom of the guide rod 14, and the diameter of the bolt head of the positioning bolt 141 is greater than the diameter of the through hole 511, thereby preventing the first blocking plate 5 from moving out of the clamping groove 12.

[0061] As shown in the drawings, a spring sleeve is arranged on the outside of the guide rod 14 to improve the stability of the spring. Figure 9

[0062] Since the second muffling pipe 2 and the first muffling pipe 1 can rotate relative to each other to change the position of the second blocking plate 23 and block the first mounting port 11, in order to prevent the second muffling pipe 2 and the first muffling pipe 1 from continuing to rotate during workpiece machining, in the present embodiment, as shown in the drawings, the outer wall of the first muffling pipe 1 is provided with a guide groove 15 arranged along the axial direction of the first muffling pipe 1, and the second muffling pipe 2 is fixedly provided with a buckling member 6, and during workpiece machining, the buckling member 6 is buckled into the guide groove 15, thereby limiting the relative rotation of the second muffling pipe 2 and the first muffling pipe 1. Figure 5 Figure 10 Figure 11 Since the second muffling pipe 2 and the first muffling pipe 1 can rotate relative to each other to change the position of the second blocking plate 23 and block the first mounting port 11, in order to prevent the second muffling pipe 2 and the first muffling pipe 1 from continuing to rotate during workpiece machining, in the present embodiment, as shown in the drawings, the outer wall of the first muffling pipe 1 is provided with a guide groove 15 arranged along the axial direction of the first muffling pipe 1, and the second muffling pipe 2 is fixedly provided with a buckling member 6, and during workpiece machining, the buckling member 6 is buckled into the guide groove 15, thereby limiting the relative rotation of the second muffling pipe 2 and the first muffling pipe 1.​​​​​

[0063] Specifically, as shown in Figure 10 and Figure 11 The buckling piece 6 includes a mounting groove 61, a buckling block 62, and a compression spring 63, wherein the mounting groove 61 is arranged on the inner wall of the second muffling pipe 2, the side wall of the buckling block 62 is in sliding connection with the inner wall of the mounting groove 61 along the radial direction of the second muffling pipe 2, the compression spring 63 is arranged in the mounting groove 61, one end of the compression spring 63 is in abutment with the buckling block 62, and the other end of the compression spring 63 is in abutment with the inner wall of the mounting groove 61.

[0064] Specifically, the cross section of the guide groove 15 and the buckling block 62 is isosceles trapezoidal.

[0065] During workpiece processing, the buckling block 62 is inserted into the guide groove 15, and when the first sealing plate 5 and the second muffling pipe 2 slide along the axial direction of the first muffling pipe 1, the buckling block 62 slides in the guide groove 15.

[0066] The mounting process of the first muffling pipe 1 and the second muffling pipe 2 is as follows:

[0067] The first muffling pipe 1 is fixedly installed on the housing of the band sawing machine;

[0068] The spring is sleeved on the guide rod 14, and then the first sealing plate 5 is inserted into the clamping groove 12, at this time the guide rod 14 extends vertically downward through the perforation 511 on the extension plate 51, and the positioning bolt 141 is installed at the bottom of the guide rod 14, so as to limit the first sealing plate 5 from being pulled out of the clamping groove 12;

[0069] The second muffling pipe 2 is sleeved on the outside of the first sealing plate 5, and then the buckling block 62 is pressed into the mounting groove 61, and at the same time the second muffling pipe 2 is sleeved on the bottom of the first muffling pipe 1, at this time the buckling block 62 is in abutment with the peripheral wall of the first muffling pipe 1 to limit the buckling block 62 from being popped out; then the second muffling pipe 2 is rotated, when the buckling block 62 is aligned with the guide groove 15, the compression spring 63 pushes the buckling block 62 outward, and the buckling block 62 is inserted into the guide groove 15, at this time the first mounting port 11 and the second mounting port 21 are located on the same vertical line;

[0070] The saw blade 101 is installed in the inner cavity of the first muffling pipe 1 and the second muffling pipe 2 through the first mounting port 11 and the second mounting port 21;

[0071] Then rotate the second muffler 2, because the cross section of the buckle block 62 and the guide groove 15 is isosceles trapezoidal, when the second muffler 2 applies a larger torsional moment, at this time, the buckle block 62 will compress the compression spring 63, the buckle block 62 rebounds into the mounting groove 61, and the second muffler 2 is twisted 180°, at this time, the first blocking plate 5 blocks the second mounting port 21 of the second muffler 2, and the second blocking plate 23 blocks the first mounting port 11 of the first muffler 1, at the same time, the clamping block 24 rotates into the locking groove 53, thereby locking the second muffler 2 and the first blocking plate 5.

[0072] Due to the action of the spring, the first blocking plate 5 is pushed downward, so that the bottom of the second muffler 2 abuts against the table surface of the processing table 10.

[0073] When the workpiece is processed, the workpiece abuts against the guide inclined surface 22 on the second muffler 2, thereby pushing the second muffler 2 upward, at this time, the second muffler 2 does not interfere with the saw blade 101 sawing the workpiece, at this time, it is worth mentioning that, as shown in Figure 2 Because the second muffler 2 moves upward, the second blocking plate 23 arranged on the second muffler 2 and blocking the first mounting port 11 also moves upward synchronously, in order to avoid the second blocking plate 23 abutting against the shell of the band sawing machine and limiting the second muffler 2 from rising, in the embodiment, the shell of the band sawing machine is provided with a avoiding hole, for the second blocking plate 23 to pass upward, thereby solving the problem that the second blocking plate 23 abutting against the shell of the band sawing machine affects the rising of the second muffler 2;

[0074] Because the lifting plate 52 extends from the bottom of the second muffler 2, at this time, the workpiece is easy to abut against the lifting plate 52, thereby limiting the workpiece from moving on the processing table 10, specifically, in the embodiment, as shown in Figure 7 The lifting plate 52 is provided with a guide surface 54 on the side facing the workpiece, wherein the guide surface 54 is in contact with the workpiece, thereby facilitating the lifting plate 52 to be pushed upward.

[0075] When the workpiece is sawed by the saw blade 101, the workpiece is divided into two parts, at this time, the spring applies a downward pushing force through the first blocking plate 5 and the second muffler 2, thereby making the sawed workpiece abut against the table surface of the processing table 10, reducing the risk of workpiece vibration after processing, and reducing the generation of noise from the source.

[0076] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, the steps described in the present disclosure can be executed in parallel, in sequence or in different order, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, which is not limited herein.

[0077] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0078] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sound muffling device of a band saw machine, which is installed on a band saw machine, characterized in that, The first sound attenuation pipe (1) and the second sound attenuation pipe (2) are sleeved outside the saw blade (101); The first sound attenuation pipe (1) is fixedly installed on the shell of the band sawing machine, and the second sound attenuation pipe (2) is slidably connected with the first sound attenuation pipe (1) along the axial direction of the first sound attenuation pipe (1); The sound attenuation lining (3) is fixedly installed on the inner wall of the first sound attenuation pipe (1) and the second sound attenuation pipe (2); The pushing piece (4) is installed in the inner cavity of the first sound attenuation pipe (1) and / or the second sound attenuation pipe (2) and is used for abutting against the workpiece on the machining table (10). The guide inclined surface (22) is arranged on the bottom side wall of the second sound attenuation pipe (2) and is used for abutting against the workpiece to be machined to lift the second sound attenuation pipe (2) upward.

2. The sound damping device of a band saw machine according to claim 1, characterized in that, The sound attenuation lining (3) comprises a first sound attenuation lining (31) and a second sound attenuation lining (32), the first sound attenuation lining (31) is fixedly installed on the inner wall of the first sound attenuation pipe (1), and the second sound attenuation lining (32) is fixedly installed on the inner wall of the second sound attenuation pipe (2).

3. The sound damper of a band saw machine according to claim 1, characterized in that, The side wall of the first sound attenuation pipe (1) is provided with a first installation opening (11) arranged along the axial direction of the first sound attenuation pipe (1), the side wall of the second sound attenuation pipe (2) is provided with a second installation opening (21) arranged along the axial direction of the second sound attenuation pipe (2), the first sound attenuation pipe (1) is rotationally connected with the second sound attenuation pipe (2), the first sound attenuation pipe (1) is provided with a first blocking plate (5) used for blocking the second installation opening (21), the second sound attenuation pipe (2) is provided with a second blocking plate (23) used for blocking the first installation opening (11), during workpiece machining, the first blocking plate (5) and the second blocking plate (23) block the second installation opening (21) and the first installation opening (11) respectively, and during saw blade (101) installation, the first installation opening (11) and the second installation opening (21) are opened.

4. The sound damper of a band saw machine according to claim 3, characterized in that, The inner wall of the first sound attenuation pipe (1) is provided with a clamping groove (12) arranged along the axial direction of the first sound attenuation pipe (1), the first blocking plate (5) is inserted into the clamping groove (12), and the first blocking plate (5) is slidably connected with the inner wall of the clamping groove (12).

5. The sound dampening device of a band saw machine according to claim 4, wherein, The bottom of the first blocking plate (5) is fixedly provided with a lifting plate (52) extending out of the second sound attenuation pipe (2) along the radial direction of the second sound attenuation pipe (2), the lifting plate (52) is provided with a locking groove (53), the bottom peripheral wall of the second sound attenuation pipe (2) is fixedly provided with a clamping block (24), during workpiece machining, the clamping block (24) is rotated into the locking groove (53) to lock the second sound attenuation pipe (2) and the first blocking plate (5), and during saw blade (101) installation, the clamping block (24) is rotated out of the locking groove (53).

6. The sound dampening device of a band saw machine according to claim 5, wherein, The pushing piece (4) is a spring, the spring is installed in the inner cavity of the first sound attenuation pipe (1), one end of the spring is fixedly connected with the inner wall of the first sound attenuation pipe (1), and the other end of the spring is fixedly connected with the first blocking plate (5).

7. The sound dampening device of a band saw machine according to claim 6, wherein The inner wall of the first muffling pipe (1) is provided with a positioning plate (13) extending along the radial direction of the first muffling pipe (1), and the top of the first blocking plate (5) is fixedly provided with an extension plate (51) extending along the radial direction of the first muffling pipe (1), one end of the spring is fixed on the positioning plate (13), and the other end of the spring is fixed on the extension plate (51).

8. The sound dampening device of a band saw machine according to claim 7, wherein, The extension plate (51) is provided with a perforation (511), the positioning plate (13) is fixedly provided with a guide rod (14) arranged along the axial direction of the first muffling pipe (1), the guide rod (14) extends downward through the perforation (511), and the bottom of the guide rod (14) is threadedly connected with a positioning bolt (141), the diameter of the bolt head of the positioning bolt (141) is greater than the diameter of the perforation (511).

9. The sound damper of a band saw machine according to claim 1, characterized in that, The outer wall of the first muffling pipe (1) is provided with a guide groove (15) arranged along the axial direction of the first muffling pipe (1), and the second muffling pipe (2) is fixedly provided with a buckling piece (6), when the workpiece is machined, the buckling piece (6) is buckled in the guide groove (15) to limit the relative circumferential rotation of the second muffling pipe (2) and the first muffling pipe (1).

10. The sound dampening device of a band saw machine according to claim 9, wherein, The buckling piece (6) comprises a mounting groove (61), a buckling block (62) and a compression spring (63), the mounting groove (61) is arranged on the inner wall of the second muffling pipe (2), the outer wall of the buckling block (62) is slidably connected with the inner wall of the mounting groove (61), the compression spring (63) is mounted in the mounting groove (61), one end of the compression spring (63) abuts against the inner wall of the mounting groove (61), the other end of the compression spring (63) abuts against the buckling block (62), and the cross sections of the buckling block (62) and the guide groove (15) are isosceles trapezoidal.

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