Hard metal saw blade protective sleeve

Abstract

The application discloses a hard alloy saw blade protection sleeve, which comprises a sleeve body with a rectangular groove in cross section and a lock key part arranged at one end of the sleeve body; a lock buckle is arranged close to the other end of the sleeve body and buckled with the lock key part; the lock buckle comprises a cylindrical part integrally injected with the sleeve body, an inverted conical part integrally injected with the cylindrical part and a normal conical part integrally injected with the inverted conical part; the lock key part is provided with a conical hole matched with the lock buckle; the application has the following beneficial effects: the sleeve body with the rectangular groove is buckled on the saw teeth, which can stably and reliably ensure that the saw teeth of the hard alloy saw blade are not damaged and the operator is not pricked or scratched by the saw teeth; the sleeve is wound on the saw teeth of the hard alloy saw blade and is not easy to loosen, so that the operation is facilitated and the working efficiency is high.

Description

Technical Field

[0001] This application relates to the technical field of carbide saw blade protection devices, specifically to a carbide saw blade protective sleeve. Background Technology

[0002] Carbide circular saw blades consist of a central, thin, circular substrate and numerous evenly distributed cutting teeth around the substrate, with the outermost teeth being the tips. The teeth are made of carbide, which is high in hardness but also brittle. During the production, transportation, and storage of the saw blade, the cutting tips are easily bumped and broken, rendering the carbide saw blade unusable. Furthermore, the cutting tips can easily cause cuts and lacerations to the operator, leading to safety accidents.

[0003] To prevent tip breakage, cuts, and scratches to operators, current carbide saw blades utilize a polyethylene pipe with a longitudinal slit. The outer teeth of the circular saw blade are placed inside the polyethylene pipe, which then wraps around the saw blade, encasing the tips of all the teeth. This method requires first cutting the polyethylene pipe longitudinally and then cutting it to a suitable length according to the circumference of the saw blade. During the winding process, the polyethylene material is relatively soft, and the original cross-section of the polyethylene pipe is circular, making the operation very difficult and requiring considerable skill and experience from the operator, resulting in low winding efficiency. Even after wrapping the teeth, the cross-section of the circular polyethylene pipe remains irregularly circular, limiting the depth of wrapping. Furthermore, due to the elasticity of the polyethylene pipe, it often loosens after being wrapped around the saw blade, rendering the wrapping function ineffective. Utility Model Content

[0004] To overcome the above deficiencies, this application provides a protective sleeve to prevent damage to the saw blade tip and to prevent cuts and punctures to those in contact with the saw blade. The protective sleeve is convenient, efficient, and cost-effective, and provides a secure connection with the saw blade.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A protective sleeve for a carbide saw blade includes a sleeve body with a rectangular groove in cross-section and a locking and keying part located at one end of the sleeve body; a latch is provided near the other end of the sleeve body to engage with the locking and keying part.

[0007] Furthermore, the latch includes a cylindrical portion integrally formed with the sleeve body, an inverted conical portion integrally formed with the cylindrical portion, and a conical portion integrally formed with the inverted conical portion.

[0008] Furthermore, the key portion is provided with a tapered hole, which is adapted to the latch.

[0009] Furthermore, the diameter of the cylindrical part is d0, 2mm≤d0≤4mm; the maximum diameter of the inverted conical part is d2, (d0+0.2)mm≤d2≤(d0+0.5)mm; the cone angle of the inverted conical part is α1, 80°≤α1≤100°; the cone angle of the upright conical part is α, 60°≤α≤70°; the minimum diameter of the upright conical part is d1, d1 is less than d3; the small end diameter of the conical hole is d3, d0≤d3≤(d0+0.2)mm; the cone angle of the conical hole is α3, α3=α.

[0010] Furthermore, the internal width of the sleeve cross-section is B1, the thickness of the saw blade teeth is B, 0.5mm≤B1-B≤1mm; and the side thickness of the sleeve is δ, 0.5mm≤δ≤1mm.

[0011] Furthermore, the depth of the cross-section of the sleeve is h1, h1≥4mm and h1 does not exceed the height of the saw blade teeth.

[0012] Furthermore, the inner diameter of the bottom of the sleeve cross-section is D1, and the outer diameter of the saw blade is D, where D+0.5≤D1≤D+2mm.

[0013] Furthermore, the two sides of the cross-section of the sleeve are inclined inward at an angle of λ, where 0°≤λ≤5°.

[0014] This application has the following beneficial effects:

[0015] This application utilizes a rectangular groove that engages with the saw teeth, reliably and stably preventing damage to the carbide saw blade's teeth while protecting the operator from cuts and injuries. The material wraps around the saw teeth of the carbide saw blade in one loop, preventing loosening, facilitating operation, and increasing work efficiency.

[0016] The material used in this application is PVC, which is cheaper than the previous method of breaking open polyvinyl chloride plastic pipes, thus reducing packaging costs.

[0017] By using several tapered holes, saw blades of similar specifications can share a single protective sleeve, expanding its versatility. For example, saw blades with a diameter of 300mm and those with a diameter of 305mm can share the same protective sleeve.

[0018] The positive cone portion facilitates the insertion of the lock into the conical hole, serving as a guide. The inverted cone portion makes it relatively easy to remove the lock from the conical hole, allowing the protective cover to be reused. Without the inverted cone portion, it would be difficult to remove the lock from the conical hole, easily damaging the protective cover.

[0019] The two sides are tilted inward, utilizing the elasticity of the material to allow the saw blade and the protective sleeve to fit better, further improving the protective effect of the protective sleeve on the saw blade. Attached Figure Description

[0020] Figure 1 This is a schematic front view of the structure of this application;

[0021] Figure 2 for Figure 1 Sectional view at EE;

[0022] Figure 3 for Figure 1 A schematic diagram of the K-axis structure;

[0023] Figure 4 This is a partial sectional front view of this application;

[0024] Figure 5 for Figure 4 Enlarged view of point I;

[0025] Figure 6 for Figure 4 Enlarged view of section II;

[0026] Figure 7 This is a partial three-dimensional structural schematic diagram of this application;

[0027] Figure 8 This is a partial structural schematic diagram of Embodiment 3 of this application;

[0028] Figure 9 This is a schematic diagram of the installation of the saw blade and the protective sleeve.

[0029] Legend:

[0030] 1-Sleeve body, 11-Opening, 12-Lock, 13-Right cone, 14-Inverted cone, 15-Cylindrical part;

[0031] 2-Key section, 21-Conical hole. Detailed Implementation

[0032] 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. The working process and driving method of cylinders and other components used in this application are common knowledge and will not be described further.

[0033] Example 1

[0034] like Figure 1-7 As shown,

[0035] A carbide saw blade protective sleeve includes a sleeve body 1 with a rectangular groove in cross section and a key portion 2 located at one end of the sleeve body 1; a latch 12 is provided near the other end of the sleeve body 1 and engages with the key portion 2.

[0036] like Figure 2 , 3 As shown, a special carbide saw blade protective sleeve is processed according to the specifications of the saw blade. The protective sleeve is a circular ring with a radial break at one point, forming a head and a tail. A latch 12 is set on the outer surface of the head, and a corresponding latch hole is set on the tail. The cross-section of the protective sleeve is "U" shaped, and the opening 11 is used to accommodate the saw blade teeth. The protective sleeve is made of plastic materials such as PVC, PET, and PS, with PVC being the preferred material.

[0037] like Figure 2 As shown, the latch 12 includes a cylindrical portion 15 integrally formed with the sleeve body 1, an inverted conical portion 14 integrally formed with the cylindrical portion 15, and a regular conical portion 13 integrally formed with the inverted conical portion 14. That is, the latch 12 is located on the outer surface of the protective sleeve head, connected to the protective sleeve body 1 by a cylinder. An inverted cone, smaller at the bottom and larger at the top, is connected to the upper part of the cylinder, and a regular conical, smaller at the top and larger at the bottom, is connected to this inverted cone.

[0038] like Figure 3 , Figure 6 As shown, the key and lock part 2 is provided with a conical hole 21, which is adapted to the latch 12. The center distance of the conical hole closest to the latch 12 is D1*π; the number of conical holes is 2-5, and the distance between any two adjacent latch holes is L, d3+2h≤L≤d3+4h; h is the thickness of the top surface of the sleeve 1; this can accommodate saw blades with similar diameters, such as saw blades with a diameter of 105 and those with a diameter of 110, which can share the same protective sleeve.

[0039] like Figure 2 , 5As shown, the diameter of the cylindrical part 15 is d0, 2mm≤d0≤4mm; the maximum diameter of the inverted conical part 14 is d2, (d0+0.2)mm≤d2≤(d0+0.5)mm; the cone angle of the inverted conical part 14 is α1, 80°≤α1≤100°; the cone angle of the upright conical part 13 is α, 60°≤α≤70°; the minimum diameter of the upright conical part 13 is d1, d1 is less than d3; the small end diameter of the conical hole 21 is d3, d0≤d3≤(d0+0.2)mm; the cone angle of the conical hole is α3, α3=α. This design facilitates the insertion of the conical portion 15 into the conical hole 21 while preventing the conical hole 21 from dislodging from the inverted conical portion 14. By making α1 greater than α, the inverted conical portion 14 is relatively steep, preventing it from dislodging from the conical hole 21. The conical hole has d0≤d3≤(d0+0.2)mm and a cone angle of α3, where α3=α. This design allows the conical portion 15 to be easily inserted into the conical hole 21 and is held in place by the junction of the conical portion 15 and the inverted conical portion 14.

[0040] like Figure 2 As shown, the internal width of the cross-section of the sleeve 1 (the width of the opening 11) is B1, the thickness of the saw blade teeth is B, 0.5mm≤B1-B≤1mm; the side thickness of the sleeve 1 is δ, 0.5mm≤δ≤1mm. The fact that the opening B1 of the cross-section is greater than the thickness of the saw teeth makes it easier for the sleeve 1 to be fastened onto the saw teeth.

[0041] like Figure 9 and Figure 2 As shown, the depth of the cross-section of sleeve 1 is h1, where h1 ≥ 4mm and h1 is not less than the height of the saw blade teeth. This is to prevent the saw teeth from being exposed outside the protective sleeve and to prevent damage to the saw teeth.

[0042] like Figure 9 As shown, the inner diameter of the bottom of the cross-section of the sleeve 1 is D1, and the outer diameter of the saw blade is D, where D+0.5≤D1≤D+2mm.

[0043] Press the U-shaped opening of the sleeve 1 onto the saw teeth, rotate it around the saw blade, then align the conical hole 21 of the key part 2 with the latch 12 and press it down. This way, the protective sleeve will be circular and will not loosen or fall off the saw teeth.

[0044] Example 2

[0045] This embodiment is basically the same as Embodiment 1, except that...

[0046] like Figure 8 As shown,

[0047] The two sides of the cross-section of the sleeve 1 are inclined inward at an angle of λ, where 0°≤λ≤5°. This angle cannot be too large, otherwise the cross-section will not be able to properly install the saw teeth; if it is too small, the saw teeth will become loose from the sleeve 1. The most suitable angle is 2 degrees.

[0048] By tilting inwards on both sides, the cross-section of the sleeve 1 can be locked tightly with the saw teeth of the saw blade, making it less prone to loosening.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A protective sleeve for a carbide saw blade, characterized in that: It includes a sleeve (1) with a rectangular groove in cross section and a key part (2) provided at one end of the sleeve (1); a latch (12) is provided near the other end of the sleeve (1) and engages with the key part (2).

2. The carbide saw blade protective sleeve according to claim 1, characterized in that: The latch (12) includes a cylindrical part (15) integrally formed with the sleeve (1), an inverted conical part (14) integrally formed with the cylindrical part (15), and a straight conical part (13) integrally formed with the inverted conical part (14).

3. The carbide saw blade protective sleeve according to claim 2, characterized in that: The key part (2) is provided with a tapered hole (21), which is adapted to the latch (12).

4. The carbide saw blade protective sleeve according to claim 3, characterized in that: The diameter of the cylindrical part (15) is d0, 2mm≤d0≤4mm; the maximum diameter of the inverted conical part (14) is d2, (d0+0.2)mm≤d2≤(d0+0.5)mm; the cone angle of the inverted conical part (14) is α1, 80°≤α1≤100°; the cone angle of the conical part (13) is α, 60°≤α≤70°; the minimum diameter of the conical part (13) is d1, d1 is less than d3; the small end diameter of the conical hole (21) is d3, d0≤d3≤(d0+0.2)mm; the cone angle of the conical hole is α3, α3=α.

5. The carbide saw blade protective sleeve according to claim 4, characterized in that: The cross-sectional internal width of the sleeve (1) is B1, the thickness of the saw blade teeth is B, 0.5mm≤B1-B≤1mm; the side thickness of the sleeve (1) is δ, 0.5mm≤δ≤1mm.

6. The carbide saw blade protective sleeve according to claim 5, characterized in that: The depth of the cross section of the sleeve (1) is h1, h1≥4mm and h1 is not less than the height of the saw blade teeth.

7. The carbide saw blade protective sleeve according to claim 6, characterized in that: The inner diameter of the bottom of the cross-section of the sleeve (1) is D1, and the outer diameter of the saw blade is D, (D+0.5)≤D1≤(D+2)mm.

8. The carbide saw blade protective sleeve according to claim 7, characterized in that: The two sides of the cross-section of the sleeve (1) are inclined inward with an inclination angle of λ, 0°≤λ≤5°.

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