Concrete cutting saw blade with replaceable sawteeth

Abstract

The utility model discloses a concrete cutting saw blade with replaceable sawteeth, and relates to the field of saw blade structures. A concrete cutting saw blade with replaceable sawteeth comprises a saw blade base body and sawtooth blocks. The sawtooth block is detachably installed on the saw blade base body, connecting parts are evenly distributed on the outer edge of the saw blade base body in the circumferential direction, each connecting part is provided with a connecting protruding block and a positioning notch, and each positioning notch is adjacent to one end of the corresponding connecting protruding block and located in the rotating advancing direction of the saw blade. The bottom of the sawtooth block is provided with a positioning groove and a positioning check block, one end of the positioning groove is plugged on the side face of the positioning check block, the connecting protruding block is inserted into the positioning groove, and meanwhile the positioning check block is installed at the position of the positioning notch. The machining precision of the positioning check block and the positioning groove of the sawtooth block is good, the manufacturing precision of the connecting protruding block is good, and after the positioning check block and the positioning groove are connected in a matched mode, it is guaranteed that the end face precision and the radial precision of sawteeth all meet the sawing requirement; after the sawtooth blocks are firmly inserted, the concrete cutting saw blade can be directly used, and installation and replacement are convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of saw blade structure, and in particular to a concrete cutting saw blade with replaceable saw teeth. Background Technology

[0002] Diamond circular saw blades are high-efficiency sawing tools for processing hard and brittle materials. They are typically made by welding pressed and sintered diamond teeth to a circular base made of low-alloy tool steel. The diamond teeth can cut concrete, stone, carbon, ceramics, and refractory materials. The steel base serves as a support. After each use, the teeth of this type of saw blade need to be re-welded. The heat effect of repeated welding can make the teeth of the base brittle and prone to breakage, rendering them unusable. Furthermore, the welding process introduces errors, resulting in significant end-face and radial runout of the teeth. For high-precision sawing, the sides and top surfaces of the teeth need to be ground to ensure proper operation. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a concrete cutting saw blade with replaceable teeth. After the saw teeth are inserted, the saw blade can be used directly. When replacement is needed, it can be simply pulled out, making replacement convenient.

[0004] To achieve this technical objective, the present invention adopts the following solution:

[0005] A concrete cutting saw blade with replaceable teeth includes a saw blade body and saw teeth blocks. The saw teeth blocks are detachably mounted on the saw blade body. Connecting parts are evenly distributed around the outer edge of the saw blade body. Connecting parts are provided with connecting protrusions and positioning notches. The positioning notches are adjacent to one end of the connecting protrusions and are located in the direction of rotation of the saw blade. The bottom of the saw teeth blocks is provided with positioning grooves and positioning blocks. One end of the positioning groove is sealed on the side of the positioning block. The connecting protrusions are inserted into the positioning grooves, and the positioning blocks are installed at the positioning notches.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: the positioning stop and positioning groove of the saw tooth block are well processed, and the manufacturing precision of the connecting protrusion is also good. After the two are connected together, the end face and radial precision of the saw tooth are fully met to meet the sawing requirements. After the saw tooth block is firmly inserted, the concrete cutting saw blade can be used directly, and the installation and replacement are convenient and quick.

[0007] The preferred embodiment of this utility model is as follows:

[0008] The saw tooth block comprises saw teeth made of diamond sintered body and a positioning part made of metal powder sintered body. The bottom surface of the positioning part is provided with a positioning groove and a positioning stop. The metal powder sintered body is preferably made of steel, which has good processing and fitting precision with the steel substrate, ensuring that the saw teeth's precision meets all sawing requirements. When the diamond sintered body in the saw teeth wears out and can no longer saw, simply tap the saw tooth block in the opposite direction of the saw blade's rotation to remove the remaining part, and then insert a new saw tooth block from the front end for quick use.

[0009] The saw teeth and the saw blade base are connected by an interference fit. The interference fit here is slight, ensuring that the saw teeth will not fall off the saw blade base when not in use; during sawing, the presence of the positioning block ensures that the position of the saw teeth remains unchanged.

[0010] The bottom surface of the positioning notch is lower than the bottom surface of the connecting protrusion, and the bottom surface of the positioning stop is lower than the bottom surface of the connecting part of the positioning groove.

[0011] The positioning groove is a dovetail groove, and the cross-section of the connecting protrusion is a dovetail-shaped protrusion.

[0012] Several slots are evenly distributed around the outer circumference of the saw blade base. Each slot houses a connecting block, and the top face of each block has a connecting protrusion and a positioning notch for connecting the saw teeth. Since the saw blade base connection may wear down over time, the connection is designed as a replaceable block, further reducing the size of replacement parts and saving maintenance costs.

[0013] A semi-circular connecting hole is provided on one side wall of the insert block, and a semi-circular connecting hole is also provided on the side wall of the slot adjacent to the side wall of the insert block. The two semi-circular connecting holes form a rivet hole, and the rivet is inserted into the rivet hole to fix the insert block to the slot and the saw blade base. Attached Figure Description

[0014] Figure 1 This is a partial front view of the concrete cutting saw blade with replaceable teeth provided in the first embodiment of the present invention.

[0015] Figure 2 A partial side view of a concrete cutting saw blade with replaceable saw teeth provided in the first embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the saw blade substrate provided in the first embodiment of the present invention;

[0017] Figure 4 This is a side view of the saw blade substrate provided in the first embodiment of the present invention;

[0018] Figure 5 This is a schematic diagram of the sawtooth block provided in the first embodiment of the present invention;

[0019] Figure 6 A side view of the sawtooth block provided in the first embodiment of this utility model;

[0020] Figure 7 A partial front view of a concrete cutting saw blade with replaceable teeth provided in the second embodiment of this utility model;

[0021] Figure 8 This is a schematic diagram of the saw blade substrate provided in the second embodiment of the present invention;

[0022] Figure 9 This is a schematic diagram of the structure of the insert block provided in the second embodiment of the present invention;

[0023] Figure 10 A side view of the insert block provided in the second embodiment of this utility model;

[0024] The markings in the diagram are as follows: 1. Saw blade base; 11. Connecting part; 12. Connecting protrusion; 13. Positioning notch; 14. Slot; 2. Saw tooth block; 21. Saw tooth; 22. Positioning groove; 23. Positioning stop; 3. Insert block; 31. Semi-circular connecting hole; 4. Rivet. Detailed Implementation

[0025] To fully understand the purpose, features, and effects of this utility model, the following specific embodiments will be used to describe the utility model in detail, but the utility model is not limited thereto. The term "several" in the following text refers to two or more quantities.

[0026] like Figures 1 to 6 As shown, this utility model provides a concrete cutting saw blade with replaceable teeth, including a saw blade base 1 and saw tooth blocks 2, which are detachably mounted on the saw blade base 1. Several connecting portions 11 are evenly distributed along the circumference of the outer edge of the saw blade base 1, each connecting portion 11 connecting one saw tooth block 2. Each connecting portion 11 has a connecting protrusion 12 and a positioning notch 13 on its outer end face. The positioning notch 13 is adjacent to the end of the connecting protrusion 12, and both occupy the outer end face of the connecting portion 11. The positioning notch 13 is located in the direction of rotation (or downward direction) of the saw blade. The bottom of the saw tooth block 2 has a positioning groove 22 and a positioning stop 23. The positioning stop 23 is adjacent to the end of the positioning groove 22, and the positioning groove 22 is blocked by the positioning stop 23. The cross-sectional shape of the positioning groove 22 is complementary to the cross-sectional shape of the connecting protrusion 12, and the positioning stop 23 is complementary to the positioning notch 13. The connecting protrusion 12 is inserted into the positioning groove 22, and the positioning stop 23 is stuck in the positioning notch 13.

[0027] Furthermore, such as Figure 5 and Figure 6As shown, the sawtooth block 2 includes saw teeth 21 supported by a diamond sintered body and a positioning part supported by a metal powder sintered body. The bottom surface of the positioning part is provided with a positioning groove 22 and a positioning stop 23. The positioning groove 22 and the connecting protrusion 12 have a slight interference fit to ensure that they will not fall off during non-working hours. The bottom surface of the positioning notch 13 is lower than the lower end surface of the connecting protrusion 12, and the lower end surface of the positioning stop 23 is lower than the lower end surface of the connecting part of the positioning groove 22. During sawing, the presence of the positioning stop 23 ensures that the position of the saw teeth remains unchanged. Preferably, the metal powder sintered body is made of steel.

[0028] Since the saw blade base 1 is directly connected to the saw tooth block 2, wear and tear will occur after long-term use. To save on replacement and maintenance costs, a further optimized implementation plan is proposed, in which the connecting part 11 is made into a detachable and replaceable component, while the structure of the saw tooth block 2 remains unchanged. Figures 7 to 10 As shown: A plurality of slots 14 are evenly distributed along the circumference of the outer edge of the saw blade base 1. The number of slots 14 is the same as the number of connecting parts 11, that is, each connecting part 11 of the saw blade base 1 is provided with one slot 14. A plug 3 is inserted into each slot 14. The top end face (outer end face) of each plug 3 is provided with a connecting protrusion and a positioning notch for connecting the saw tooth block 2. The structure of the connecting protrusion and positioning notch is the same as in the aforementioned embodiment. A semi-circular connecting hole 31 is opened on one side wall of the plug 3, such as... Figure 9 As shown, the side wall of the slot 14 adjacent to the side of the insert block is also provided with a semi-circular connecting hole. The two semi-circular connecting holes form a complete rivet hole. The insert block is fixed to the saw blade base 1 by inserting the rivet 4.

[0029] Preferably, the cross-sectional shape of the positioning groove 22 and the connecting protrusion 12 is dovetail-shaped, but other cross-sectional shapes that achieve sliding engagement are also possible.

[0030] This invention uses a mechanical inlay method to connect saw teeth to the saw blade base (steel base). The joint between the saw teeth and the base is designed with a specialized connection structure, which allows for precise and secure connection, meeting sawing requirements. It eliminates the need for grinding the sides and top of the saw teeth, ensures the saw blade base is not affected by abnormal heat, maintains high rigidity and precision, and extends cycle life. Furthermore, the saw teeth can be easily and quickly replaced on-site, reducing the workload of transportation, re-welding, and leveling each time.

[0031] Finally, it should be noted that the above-listed embodiments are merely preferred embodiments of the present invention. Of course, those skilled in the art can make modifications and variations to the present invention. If such modifications and variations fall within the scope of the claims of the present invention and their equivalents, they should be considered as being within the protection scope of the present invention.

Claims

1. A concrete cutting saw blade with replaceable teeth, comprising a saw blade base and saw tooth blocks; characterized in that, The saw teeth are detachably mounted on the saw blade base. Connecting parts are evenly distributed in the circumferential direction on the outer edge of the saw blade base. Connecting parts are provided with connecting protrusions and positioning notches. The positioning notches are adjacent to one end of the connecting protrusions and are located in the direction of rotation of the saw blade. The bottom of the serrated block is provided with a positioning groove and a positioning stop. One end of the positioning groove is sealed on the side of the positioning stop, and the connecting protrusion is inserted into the positioning groove. At the same time, the positioning stop is installed at the positioning notch.

2. The concrete cutting saw blade with replaceable teeth according to claim 1, characterized in that, The sawtooth block includes saw teeth made of diamond sintered body and positioning parts made of metal powder sintered body. The bottom surface of the positioning parts is provided with positioning grooves and positioning blocks.

3. The concrete cutting saw blade with replaceable teeth according to claim 1, characterized in that, The saw teeth and the saw blade base are connected by an interference fit.

4. The concrete cutting saw blade with replaceable teeth according to claim 1, characterized in that, The bottom surface of the positioning notch is lower than the bottom surface of the connecting protrusion, and the bottom surface of the positioning stop is lower than the bottom surface of the connecting part of the positioning groove.

5. The concrete cutting saw blade with replaceable teeth according to claim 1, characterized in that, The positioning groove is a dovetail groove, and the cross-section of the connecting protrusion is a dovetail-shaped protrusion.

6. The concrete cutting saw blade with replaceable teeth according to claim 1, characterized in that, Several slots are evenly distributed around the outer edge of the saw blade base. Each slot contains a connecting block. The top face of each connecting block has a connecting protrusion and a positioning notch for connecting the saw teeth block.

7. The concrete cutting saw blade with replaceable teeth according to claim 6, characterized in that, A semi-circular connecting hole is provided on one side wall of the insert block, and a semi-circular connecting hole is also provided on the side wall of the slot adjacent to the side wall of the insert block. The two semi-circular connecting holes form a rivet hole, and the rivet is inserted into the rivet hole to fix the insert block to the slot and the saw blade base.

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