A disc saw guard assembly and device

Abstract

The application discloses a disc saw protection assembly and device, and relates to the technical field of disc saws. The disc saw protection assembly comprises a vertically arranged fixing pipe, a connecting rod movably arranged in the fixing pipe, a protection cover connected with the lower end of the connecting rod and arranged below the fixing pipe, and a compression spring arranged between the protection cover and the fixing pipe. The upper end of the connecting rod is hingedly connected with a control rod penetrating through the fixing pipe. The fixing pipe is provided with a long strip-shaped slot through which the control rod penetrates and moves up and down. One side of the fixing pipe is connected with a supporting shaft, and one end of the control rod extends above the supporting shaft and is supported on the supporting shaft. The application is used for cutting wood of different thicknesses under the condition of safety protection. When the height of the protection cover is adjusted, the operation is simple, the risk of blockage is reduced, and the movement of the connecting rod in the fixing pipe is smoother.

Description

Technical Field

[0001] This application relates to the field of circular saw technology, specifically to a circular saw protective component and device. Background Technology

[0002] In construction sites such as building and bridge projects, the fabrication of cast-in-place components typically relies on wooden formwork, plywood, and timber. These materials need to be fabricated, assembled, and disassembled on-site to meet the requirements of different formwork specifications. Circular saws, as key tools in wood processing, can efficiently cut wood into the required sizes and shapes. However, circular saws pose certain safety hazards when rotating at high speeds. For example, the sharp edges of the saw blade can easily cut operators, and the flying debris generated during high-speed rotation can injure operators' eyes, face, and other areas. Therefore, to ensure operator safety, circular saws must be equipped with reliable protective devices to effectively prevent accidents.

[0003] Patent application CN209831965U discloses a protective device for a circular saw. The height of the protective cover can be adjusted according to the thickness of the wood, allowing the saw blade to cut wood of different thicknesses under safe protection. During operation, the fastening nut is first tightened so that it does not contact the outer surface of the crossbar, allowing the sliding rod to slide along the length of the slot. The operator observes a scale according to the wood thickness, and the sliding rod, through a connecting rod, drives the collar to rise and fall along the length of the suspension rod, causing the protective cover to rise and fall according to the thickness of the wood being processed. The protective cover slides along the suspension rod above the wood, ensuring it covers the circular saw as much as possible. Then, the fastening nut is tightened again, bringing it into contact with the outer surface of the crossbar, thus fixing the height of the protective cover.

[0004] However, this type of circular saw protective device also has the following drawbacks: During the adjustment of the protective cover's height, the horizontal movement of the sliding rod is transmitted to the collar via the connecting rod, which is then converted into the collar's vertical movement on the boom. Because the angle between the direction of the force exerted by the connecting rod on the collar and the direction of the collar's movement is relatively large, the collar is prone to jamming on the boom, resulting in an unsmooth adjustment process. Furthermore, after the protective cover's height is adjusted, the fastening nut needs to be tightened for fixation, which is cumbersome. If the operator forgets to tighten the fastening nut after adjustment, the protective cover will not be secured, posing a certain safety hazard. Utility Model Content

[0005] The purpose of this application is to provide a protective component and device for circular saws, which solves the problem that existing circular saw protective devices are cumbersome to operate and prone to jamming when adjusting the height of the protective cover.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] In a first aspect, a protective assembly for a circular saw is provided, including a vertically arranged fixed tube, a connecting rod that can move up and down is provided inside the fixed tube, a protective cover connected to the lower end of the connecting rod is provided below the fixed tube, and a compression spring is provided between the protective cover and the fixed tube.

[0008] The upper end of the connecting rod is hinged to a control rod that passes through the fixed tube. The fixed tube has an elongated groove through which the control rod can pass and move up and down. A support shaft is connected to one side of the fixed tube. One end of the control rod extends above the support shaft and is supported on the support shaft.

[0009] Furthermore, two ear plates are provided on one side of the fixed tube, and the two ends of the support shaft are rotatably connected to the two ear plates.

[0010] Furthermore, the bottom of the protective cover is equipped with rollers.

[0011] Furthermore, the compression spring comprises two springs, which are symmetrically arranged on both sides of the connecting rod.

[0012] Furthermore, the fixed tube is provided with an upper plate, the protective cover is provided with a lower plate, the upper end of the compression spring is connected to the upper plate, and the lower end of the compression spring is connected to the lower plate.

[0013] Furthermore, the compression spring is provided with a guide rod, which passes through the upper plate and can move up and down relative to the upper plate, and the lower end of the guide rod is connected to the lower plate.

[0014] Secondly, a circular saw protection device is provided, including a support frame and a protection component, wherein the protection component is the circular saw protection component, and the upper end of the fixing tube is connected to the support frame.

[0015] Furthermore, the support frame includes a base, an upright, and a first crossbar. The base is connected to the lower end of the upright, the upper end of the upright is connected to one end of the first crossbar, and the other end of the first crossbar is connected to the upper end of the fixing tube.

[0016] Furthermore, a second crossbar is provided below the first crossbar, one end of the second crossbar is connected to the upright, and the other end of the second crossbar is used to connect to the operating table.

[0017] Furthermore, a first diagonal brace is provided between the first horizontal bar and the vertical bar, and a second diagonal brace is provided between the second horizontal bar and the vertical bar.

[0018] The beneficial effects of this application are:

[0019] The circular saw protective assembly and device provided in this application embodiment are used to enable the circular saw blade to cut wood of different thicknesses under safe protection conditions. By hinged the control rod to the connecting rod and supporting one end of the control rod on the support shaft, the operator only needs to hold the other end of the control rod and apply upward force to drive the connecting rod to move the protective cover upward, providing sufficient space for the wood to be placed. During this process, the compression spring is compressed and stores elastic potential energy. After the wood is placed, the operator removes the force on the control rod, the compression spring releases energy, and pushes the protective cover downward to cover the circular saw blade, ensuring that the saw blade is in an effective protective state throughout the entire wood cutting process.

[0020] Compared to existing circular saw protective devices, this application ensures that the connecting rod experiences force in the same direction as its movement when adjusting the height of the protective cover, reducing the risk of jamming and ensuring smoother movement of the connecting rod within the fixed tube. Simultaneously, the restoring force of the compression spring not only ensures the protective cover remains in an effective protective state, reducing safety hazards caused by operational errors or improper cover positioning, but also provides additional buffering for the protective device, absorbing some of the vibration and impact generated during wood cutting, further reducing the safety risks for operators. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the circular saw protective assembly provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the structure through which the control rod passes through the long slot of the fixed tube;

[0024] Figure 3 This is an initial state diagram showing the saw blade covered by a protective cover;

[0025] Figure 4 This is a diagram showing the state after the protective shield has been moved upwards;

[0026] Figure 5 A diagram showing the state of the wood after it has been placed on the workbench and the protective cover has been reset.

[0027] Figure 6 This is a schematic diagram of the structure of the circular saw protection device provided in the embodiments of this application.

[0028] Figure label:

[0029] 10 - Protective components;

[0030] 101-Fixed tube; 1011-Elongated groove; 102-Connecting rod; 103-Protective cover; 104-Compression spring; 105-Control rod; 106-Support shaft; 107-Ear plate; 108-Roller; 109-Upper plate; 110-Lower plate; 111-Guide rod; 112-Rotating shaft; 113-Gear slot;

[0031] 20-Support frame;

[0032] 201 - Base; 202 - Upright post; 203 - First horizontal bar; 204 - Second horizontal bar; 205 - First diagonal bar; 206 - Second diagonal bar;

[0033] 30 - Control table; 301 - Saw blade;

[0034] 40 - Timber. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0036] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0038] See Figure 1 , Figure 2 This application provides a protective assembly for a circular saw, including a vertically arranged fixed tube 101, a connecting rod 102 that can move up and down inside the fixed tube 101, a protective cover 103 connected to the lower end of the connecting rod 102 at the bottom of the fixed tube 101, and a compression spring 104 between the protective cover 103 and the fixed tube 101; a control rod 105 that passes through the fixed tube 101 is hinged to the upper end of the connecting rod 102; the fixed tube 101 has an elongated groove 1011 through which the control rod 105 can pass and move up and down; a support shaft 106 is connected to one side of the fixed tube 101; one end of the control rod 105 extends above the support shaft 106 and is supported on the support shaft 106.

[0039] See Figure 1 The fixing tube 101 is a vertically oriented tubular structure with openings at both ends. It is used to fix a support frame to the ground or workbench. The fixing tube 101 can be a square, rectangular, or round tube. The connecting rod 102 is vertically oriented, and its external dimensions are smaller than the internal dimensions of the fixing tube 101, allowing it to be placed inside and move up and down within the fixing tube 101. The upper end of the connecting rod 102 is located inside the fixing tube 101, and its lower end extends downwards to below the fixing tube 101 and is fixedly connected to a protective cover 103, which covers the circular saw blade. A compression spring 104 is provided between the protective cover 103 and the fixing tube 101, providing a downward restoring force to the protective cover 103. For example, the compression spring 104 can be directly sleeved on the connecting rod 102, with its two ends contacting the fixing tube 101 and the protective cover 103 respectively.

[0040] See Figure 1 , Figure 2 The upper end of the connecting rod 102 is rotatably connected to the control rod 105 via a horizontally arranged rotating shaft 112, allowing the control rod 105 to rotate around the rotating shaft 112 in a vertical plane. The control rod 105 passes through the fixed tube 101, with both ends extending to the sides of the fixed tube 101. A long, vertically extending slot 1011 is provided on the wall of the fixed tube 101 opposite the control rod 105. The control rod 105 passes through the long, vertically extending slot 1011 and can move up and down within it. A support shaft 106 is connected to one side of the fixed tube 101. One end of the control rod 105 extends above the support shaft 106 and is supported on it, and the control rod 105 can move axially along the support shaft 106. The control rod 105 is supported by the support shaft 106 to form a fulcrum. When the other end of the control rod 105 is subjected to an upward force, the control rod 105 can drive the connecting rod 102 to move upward.

[0041] The circular saw protective assembly provided in this application embodiment is used to enable the circular saw blade 301 to cut wood of different thicknesses under safe protection conditions. The protective principle of this circular saw protective assembly is as follows:

[0042] First, see Figure 3 The fixing pipe 101 is fixedly connected to the support frame fixed on the ground or operating table 30, and the protective cover 103 is made to completely cover the circular saw blade 301; for the sake of simplicity, the structure of the support frame is not shown in the figure. Then, see Figure 4 The operator grips the right end of the control lever 105 and applies upward force. The control lever 105 rotates upward around the support shaft 106, thereby driving the connecting rod 102 to move upward. The connecting rod 102 then moves the protective cover 103 upward, increasing the distance between the bottom of the protective cover 103 and the operating table 30. During this process, the compression spring 104 is compressed and stores elastic potential energy. When the distance between the bottom of the protective cover 103 and the operating table 30 is greater than the thickness of the wood 40, the wood 40 is placed on the operating table 30. Then, see... Figure 5 The operator releases the control lever 105, compresses the spring to release energy, and pushes the protective cover 103 downward to cover the saw blade 301 of the circular saw. When the bottom of the protective cover 103 contacts the top of the wood 40, the circular saw can be started to cut the wood 40 using the saw blade 301.

[0043] The circular saw protective assembly provided in this application hinges the control rod 105 to the connecting rod 102 and supports one end of the control rod 105 on the support shaft 106. The operator only needs to hold the other end of the control rod 105 and apply upward force to drive the connecting rod 102 to move the protective cover 103 upward, providing sufficient space for the placement of the wood 40. During this process, the compression spring 104 is compressed and stores elastic potential energy. After the wood 40 is placed, the operator removes the force on the control rod 105, the compression spring 104 releases energy, and pushes the protective cover 103 downward to cover the saw blade 301 of the circular saw, ensuring that the saw blade 301 is always in an effective protective state throughout the entire process of cutting the wood 40.

[0044] Compared to existing circular saw protective devices, this application ensures that when adjusting the height of the protective cover 103, the force direction of the connecting rod 102 is the same as its movement direction, reducing the risk of jamming and ensuring smoother movement of the connecting rod 102 within the fixed tube 101. Simultaneously, the restoring force of the compression spring 104 not only ensures that the protective cover 103 is always in an effective protective state, reducing safety hazards caused by operational errors or improper positioning of the protective cover 103, but also provides additional buffering for the protective device, absorbing some of the vibration and impact generated during the cutting process, further reducing the safety risks for operators.

[0045] In some embodiments, see Figure 1 , Figure 2 Two ear plates 107 are provided on one side of the fixed tube 101, and both ends of the support shaft 106 are rotatably connected to the two ear plates 107. Correspondingly, by providing the two ear plates 107, not only is a stable connection between the support shaft 106 and the fixed tube 101 achieved, but a reliable lateral limiting function is also provided for the control rod 105, effectively preventing the control rod 105 from accidentally falling off the support shaft 106 due to external force during operation, thereby ensuring the stability of the entire protective assembly during use. By rotatably connecting the support shaft 106 and the ear plates 107, the support shaft 106 can rotate during the operation of the control rod 105, thereby reducing the frictional resistance between the control rod 105 and the support shaft 106, making the operation of the control rod 105 more effortless.

[0046] In some embodiments, see Figure 2 The inner cavity of the fixed tube 101 is larger than the connecting rod 102, allowing the connecting rod 102 to move left and right within the fixed tube 101. The width of the elongated groove 1011 is larger than the cross-sectional dimension of the control rod 105, allowing the control rod 105 to move left and right within the elongated groove 1011. Several stop grooves 113 are spaced from top to bottom on the side of the fixed tube 101 away from the support shaft 106. By moving the control rod 105 left and right, it can be supported on different stop grooves 113. Correspondingly, by supporting the control rod 105 on different stop grooves 113, the operator can quickly and accurately adjust the height of the protective cover 103 according to the thickness of the wood or other processing requirements. This multi-position design makes the height adjustment of the protective cover 103 more flexible and adaptable to the cutting needs of different specifications of wood.

[0047] In some embodiments, see Figure 1 The bottom of the protective cover 103 is equipped with rollers 108. Accordingly, by setting rollers 108, when the wood 40 is placed between the operating table 30 and the protective cover 103, the bottom of the protective cover 103 contacts the top of the wood 40 through the rollers 108. During the cutting process of the wood 40, the rollers 108 roll on the top of the wood 40, thereby reducing the frictional resistance between the wood 40 and the protective cover 103 and avoiding jamming caused by excessive frictional resistance.

[0048] In some embodiments, see Figure 1Two compression springs 104 are symmetrically arranged on both sides of the connecting rod 102. Accordingly, by symmetrically arranging the two compression springs 104 on both sides of the connecting rod 102, during the lifting and lowering of the protective cover 103, the two compression springs 104 can be compressed and released simultaneously, ensuring that the connecting rod 102 remains balanced when moving up and down within the fixed tube 101, avoiding tilting or jamming caused by unilateral force. Simultaneously, the symmetrically arranged two compression springs 104 can also provide a greater restoring force. When the protective cover 103 is subjected to external force and its position shifts, the two compression springs 104 can quickly release energy, pushing the protective cover 103 to quickly return to its original position, ensuring that the protective cover 103 is always in an effective protective state.

[0049] In some embodiments, see Figure 1 The fixed tube 101 is equipped with an upper plate 109, and the protective cover 103 is equipped with a lower plate 110. The upper end of the compression spring 104 is connected to the upper plate 109, and the lower end of the compression spring 104 is connected to the lower plate 110. A guide rod 111 is provided inside the compression spring 104. The guide rod 111 passes through the upper plate 109 and can move up and down relative to the upper plate 109. The lower end of the guide rod 111 is connected to the lower plate 110. Accordingly, by setting the guide rod 111, the extension and retraction movement of the compression spring 104 can be effectively guided, ensuring its smooth axial movement, avoiding lateral displacement or twisting of the compression spring 104 during compression and release, improving the stability and reliability of the compression spring 104's movement, and reducing the risk of jamming or damage caused by deformation of the compression spring 104.

[0050] See Figure 6 This application embodiment also provides a circular saw protection device, including a support frame 20 and a protection component 10. The protection component 10 is the circular saw protection component provided in this application embodiment, and the upper end of the fixing tube 101 is connected to the support frame 20.

[0051] Correspondingly, the support frame 20 is used to fix it on the ground foundation or the workbench 30. By connecting the upper end of the fixing tube 101 to the support frame 20, the entire protective assembly can be suspended above the saw blade 301, and then the protective cover 103 can cover the saw blade 301, so that the saw blade 301 can cut wood of different thicknesses under safe protection conditions.

[0052] In some embodiments, see Figure 6The support frame 20 includes a base 201, an upright 202, and a first crossbar 203. The base 201 is connected to the lower end of the upright 202, the upper end of the upright 202 is connected to one end of the first crossbar 203, and the other end of the first crossbar 203 is connected to the upper end of the fixing tube 101. Accordingly, the base 201 is used to fix it to the ground foundation, and the upright 202 is used to support and fix the first crossbar 203 and provide a certain height, so that the first crossbar 203 is suspended above the operating table 30.

[0053] For example, see Figure 6 A second horizontal bar 204 is provided below the first horizontal bar 203. One end of the second horizontal bar 204 is connected to the vertical bar 202, and the other end of the second horizontal bar 204 is used to connect to the operating table 30. A first diagonal bar 205 is provided between the first horizontal bar 203 and the vertical bar 202, and a second diagonal bar 206 is provided between the second horizontal bar 204 and the vertical bar 202.

[0054] Correspondingly, by connecting the second crossbar 204 to the operating table 30, the firmness and stability of the support frame 20 after it is fixed are improved. By setting the first diagonal bar 205, the firmness of the connection between the first crossbar 203 and the upright 202 is improved; by setting the second diagonal bar 206, the firmness of the connection between the second crossbar 204 and the upright 202 is improved.

[0055] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A disc saw guard assembly comprising: It includes a vertically arranged fixed tube (101), a connecting rod (102) that can move up and down is provided inside the fixed tube (101), a protective cover (103) connected to the lower end of the connecting rod (102) is provided below the fixed tube (101), and a compression spring (104) is provided between the protective cover (103) and the fixed tube (101); The upper end of the connecting rod (102) is hinged to a control rod (105) that passes through the fixed tube (101). The fixed tube (101) is provided with an elongated groove (1011) through which the control rod (105) passes and can move up and down. A support shaft (106) is connected to one side of the fixed tube (101). One end of the control rod (105) extends above the support shaft (106) and is supported on the support shaft (106).

2. The circular saw guard assembly of claim 1, wherein, Two ear plates (107) are provided on one side of the fixed tube (101), and the two ends of the support shaft (106) are rotatably connected to the two ear plates (107).

3. The circular saw guard assembly of claim 1, wherein, The bottom of the protective cover (103) is provided with rollers (108).

4. The circular saw guard assembly of claim 1, wherein, The compression spring (104) comprises two springs, which are symmetrically arranged on both sides of the connecting rod (102).

5. The circular saw guard assembly of claims 1, 2, 3, or 4, wherein, The fixed tube (101) is provided with an upper plate (109), the protective cover (103) is provided with a lower plate (110), the upper end of the compression spring (104) is connected to the upper plate (109), and the lower end of the compression spring (104) is connected to the lower plate (110).

6. The circular saw guard assembly of claim 5, wherein, The compression spring (104) is provided with a guide rod (111), which passes through the upper plate (109) and can move up and down relative to the upper plate (109). The lower end of the guide rod (111) is connected to the lower plate (110).

7. A guard for a circular saw, characterized in that It includes a support frame (20) and a protective component (10), wherein the protective component (10) is the circular saw protective component according to any one of claims 1 to 6, and the upper end of the fixing tube (101) is connected to the support frame (20).

8. The disc saw guard of claim 7, wherein, The support frame (20) includes a base (201), an upright (202) and a first crossbar (203). The base (201) is connected to the lower end of the upright (202), the upper end of the upright (202) is connected to one end of the first crossbar (203), and the other end of the first crossbar (203) is connected to the upper end of the fixing tube (101).

9. The disc saw guard of claim 8, wherein, A second crossbar (204) is provided below the first crossbar (203). One end of the second crossbar (204) is connected to the upright (202), and the other end of the second crossbar (204) is used to connect to the operating table (30).

10. The disc saw guard of claim 9, wherein, A first diagonal brace (205) is provided between the first horizontal bar (203) and the vertical bar (202), and a second diagonal brace (206) is provided between the second horizontal bar (204) and the vertical bar (202).

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