Fixing device for transmission shaft and circular saw blade of sawing machine

Abstract

The utility model discloses a fixing device for a transmission shaft and a circular saw blade of a sawing machine, one end of a left clamping piece and one end of a right clamping piece, which are attached to the saw blade, are respectively provided with an annular saw blade buffer groove, and a saw blade buffer pad is arranged in the saw blade buffer groove; the outer wall of the saw blade positioning shaft sleeve is provided with a rough layer which is attached to the inner wall of a shaft hole of the saw blade; shaft sleeve buffering grooves are formed in the peripheries of shaft holes, attached to the saw blade positioning shaft sleeve, of the left clamping piece and the right clamping piece, and shaft sleeve buffering pads are arranged in the shaft sleeve buffering grooves. The left clamping piece is welded and fixed on the transmission shaft, the saw blade buffer groove and the corresponding saw blade buffer pad are arranged on the left clamping piece, the saw blade positioning shaft sleeve and the shaft sleeve buffer groove and the corresponding shaft sleeve buffer pad are arranged on the right clamping piece, elastic binding faces of the saw blade and the left clamping piece and the right clamping piece are increased, and mechanical binding faces of the saw blade and the left clamping piece and the right clamping piece are reduced. The attaching degree of the circular saw blade and the left and right clamping pieces is improved, swing of the saw blade is reduced, and the problems of offset sawing, non-uniform cutting depth and the like are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sawing processing production of aluminum alloy guide rods, and particularly relates to a fixing device for a sawing machine transmission shaft and a circular saw blade. Background Art

[0002] In the sawing production of aluminum alloy square bars, the reliable fixation of the high-speed circular saw blade and the shaft determines the sawing quality, efficiency and benefits. The sawing machine of our company uses a 900*5mm circular saw blade, and the power is transmitted from the motor to the transmission shaft through a belt, driving the transmission shaft and the saw blade to rotate at high speed to cut the aluminum alloy square bar. The original saw blade fixing device is fixed by two annular clamping pieces with an inner diameter of 60 and an outer diameter of 200 and four fixing bolts. Since the fixing clamping pieces are processed parts, problems such as the shaft hole diameter, surface roughness and unevenness often occur, resulting in non-compliance of the coaxiality, perpendicularity, clamping force, etc. after the circular saw blade is fixed. In production, situations such as saw blade slippage, swing, and large instantaneous cutting amounts often occur. This causes the surface of the sawn product to be uneven and inclined, and the saw blade to frequently break teeth. On the one hand, the product quality is unstable and is complained by users; on the other hand, the consumption of saw blades increases greatly, consuming labor and materials, reducing the benefits of the product, and occupying a large amount of costs in the operation area. Content of the Utility Model

[0003] The purpose of the utility model is to provide a fixing device for a sawing machine transmission shaft and a circular saw blade to solve the above problems.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] A fixing device for a sawing machine transmission shaft and a circular saw blade includes a saw blade, a transmission shaft, a left clamping piece and a right clamping piece. The left clamping piece and the right clamping piece are annular. The left clamping piece and the right clamping piece are clamped on both sides of the saw blade. The left clamping piece is arranged on the side close to the bearing box. The transmission shaft passes through the shaft holes of the left clamping piece, the saw blade and the right clamping piece. Annular saw blade buffer grooves are respectively arranged at one ends of the left clamping piece and the right clamping piece that are in contact with the saw blade. Saw blade buffer pads are arranged in the saw blade buffer grooves; a saw blade positioning shaft sleeve is sleeved on the outer periphery of the transmission shaft, and a rough layer is arranged on the outer wall of the saw blade positioning shaft sleeve to be closely attached to the inner wall of the shaft hole of the saw blade; shaft sleeve buffer grooves are respectively arranged on the outer periphery of the shaft holes of the left clamping piece and the right clamping piece that are in contact with the saw blade positioning shaft sleeve, and shaft sleeve buffer pads are arranged in the shaft sleeve buffer grooves.

[0006] In order to further implement the utility model, the saw blade buffer grooves, the saw blade positioning shaft sleeve and the shaft sleeve buffer grooves are all annular, and their centers are all overlapped with the center of the saw blade or the axis of the transmission shaft.

[0007] In order to further implement the utility model, a number of screw holes are arranged on the circumference of the saw blade, the left clamping piece and the right clamping piece. Through holes matching the screw holes are arranged on the saw blade buffer pads, and hexagon nuts are arranged in the screw holes and the through holes.

[0008] To further implement the present utility model, the outer diameter of the left clamping piece and the right clamping piece is 247 mm.

[0009] To further implement the present utility model, the inner diameter of the saw blade buffer groove is 120 mm, the outer diameter is 200 mm, and the depth is 5 mm; the saw blade buffer pad is made of wear-resistant rubber material, the inner diameter of the saw blade buffer pad is 120 mm, the outer diameter is 200 mm, and the depth is 6 mm.

[0010] To further implement the present utility model, the inner diameter of the saw blade positioning bushing is 60 mm, the outer diameter is 80 mm, and the depth is 5 mm.

[0011] To further implement the present utility model, the perpendicularity tolerance between the end faces of the left clamping piece and the right clamping piece and the transmission shaft is less than 0.04 mm.

[0012] To further implement the present utility model, the inner diameter of the bushing buffer groove is 60 mm, the outer diameter is 70 mm, and the depth is 5 mm; the bushing buffer pad is made of wear-resistant rubber material, the inner diameter of the bushing buffer pad is 60 mm, the outer diameter is 70 mm, and the depth is 6 mm.

[0013] To further implement the present utility model, the saw blade, the transmission shaft, the left clamping piece, the right clamping piece and the saw blade positioning bushing are all made of quenched and tempered 45# steel.

[0014] To further implement the present utility model, the shaft hole of the left clamping piece is fixedly connected to the transmission shaft.

[0015] The beneficial effects of the present utility model compared with the prior art are as follows:

[0016] The device of the present utility model completely solves the problems of excessive swing amplitude during high-speed operation of the saw blade and relative sliding between the clamping piece and the saw blade. The left clamping piece is welded and fixed to the transmission shaft, and saw blade buffer grooves and corresponding saw blade buffer pads, saw blade positioning bushings, and bushing buffer grooves and corresponding bushing buffer pads are provided on the left and right clamping pieces, increasing the elastic fitting surface between the saw blade and the left and right clamping pieces, reducing the mechanical fitting surface between the saw blade and the left and right clamping pieces, improving the tightness between the circular saw blade and the left and right clamping pieces, greatly reducing the swing of the saw blade, and solving problems such as saw blade deviation and uneven cutting depth. By implementing the above improvement measures, faults such as saw blade deviation, saw cut surface steps, and tooth breakage are eliminated, and the designed service life of the saw blade is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a structural schematic diagram of the left clamping piece in the present utility model;

[0019] Figure 3 is a structural schematic diagram of the right clamping piece in the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the saw blade positioning bushing in the present utility model;

[0021] The meanings of the reference numerals are as follows: 1, left clamping piece; 2, right clamping piece; 3, saw blade; 4, saw blade buffer groove; 5, saw blade buffer pad; 6, transmission shaft; 7, saw blade positioning bushing; 8, rough layer; 9, hexagon nut; 10, bushing buffer groove; 11, bushing buffer pad; 12, screw hole. Specific embodiments

[0022] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] As Figures 1-4 shown, a fixing device for a sawing machine transmission shaft and a circular saw blade includes a saw blade, a transmission shaft, a left clamping piece and a right clamping piece. The left clamping piece and the right clamping piece are annular. The outer diameters of the left clamping piece 1 and the right clamping piece 2 are 247 mm. The left clamping piece and the right clamping piece are clamped on both sides of the saw blade. The left clamping piece is arranged on the side close to the bearing box. The transmission shaft passes through the shaft holes of the left clamping piece, the saw blade and the right clamping piece. The shaft hole of the left clamping piece 1 is fixedly connected to the transmission shaft 6. The perpendicularity tolerance between the end faces of the left clamping piece 1 and the right clamping piece 2 and the transmission shaft 6 is less than 0.04 mm. Annular saw blade buffer grooves 4 are respectively arranged at one ends of the left clamping piece 1 and the right clamping piece 2 that are in contact with the saw blade 3. Saw blade buffer pads 5 are arranged in the saw blade buffer grooves 4. The inner diameter of the saw blade buffer groove 4 is 120 mm, the outer diameter is 200 mm, and the depth is 5 mm; The saw blade buffer pad 5 is made of wear-resistant rubber material. The inner diameter of the saw blade buffer pad 5 is 120 mm, the outer diameter is 200 mm, and the depth is 6 mm; A saw blade positioning bushing 7 is sleeved on the outer periphery of the transmission shaft 6. The inner diameter of the saw blade positioning bushing 7 is 60 mm, the outer diameter is 80 mm, and the depth is 5 mm. A rough layer 8 is arranged on the outer wall of the saw blade positioning bushing 7 and is in close contact with the inner wall of the shaft hole of the saw blade 3; Bushing buffer grooves 10 are respectively arranged on the outer periphery of the shaft holes of the left clamping piece 1 and the right clamping piece 2 that are in contact with the saw blade positioning bushing 7. Bushing buffer pads 11 are arranged in the bushing buffer grooves 10. The inner diameter of the bushing buffer groove 10 is 60 mm, the outer diameter is 70 mm, and the depth is 5 mm; The bushing buffer pad 11 is made of wear-resistant rubber material. The inner diameter of the bushing buffer pad 11 is 60 mm, the outer diameter is 70 mm, and the depth is 6 mm.

[0024] Among them, the saw blade buffer groove 4, the saw blade positioning bushing 7 and the bushing buffer groove 10 are all annular, and their centers are all overlapped with the center of the saw blade 3 or the axis of the transmission shaft 6.

[0025] A number of screw holes 12 are arranged on the circumference of the saw blade 3, the left clamping piece 1 and the right clamping piece 2. Through holes matching the screw holes 12 are arranged on the saw blade buffer pad 5. Hexagon nuts 9 are arranged in the screw holes 12 and the through holes.

[0026] The saw blade 3, the transmission shaft 6, the left clamping piece 1, the right clamping piece 2 and the saw blade positioning bushing 7 are all made of quenched and tempered No. 45 steel.

[0027] In the present utility model, the outer diameter of the left and right clamping pieces is increased to 247 mm. Compared with the circular saw blade with an outer diameter of 900 mm, the fixed contact surface diameter reaches 27% of the diameter of the circular saw blade, increasing the fixed stiffness of the saw blade; a saw blade positioning bushing with an inner diameter of 60 mm, an outer diameter of 80 mm and a thickness of 5 mm is designed on the contact surface between the saw blade and the transmission shaft, which can eliminate the friction of the contact surface between the inner diameter of the saw blade and the shaft during high-speed rotation, reduce the wear of the contact surface between the shaft and the saw blade, and extend the service life of the shaft; the annular buffer groove designed on the clamping piece is 5 mm deep, and its function is to place an elastic high-temperature resistant rubber pad with a matching size and slightly thicker in the groove, so that the saw blade has shock resistance and damping, enhances the friction between the clamping piece and the saw blade, enhances the tightness between the clamping piece and the saw blade, eliminates the sliding and swinging of the saw blade in the high-speed rotation state, etc., and can greatly improve the fixing force between the circular saw blade and the saw bed shaft.

[0028] The outer ring surface of the circular saw blade positioning bushing maintains a certain roughness to achieve a tight fit with the inner wall of the shaft hole of the circular saw blade. The thickness is designed to be 5 mm. When installing, the two end faces of the saw blade positioning bushing are polished so that its thickness is slightly lower than the thickness of the circular saw blade, and the tightness between the clamping piece and the saw blade is not affected after assembly. Its main function is to strengthen the positioning of the saw blade, prevent the saw blade from moving left and right, and at the same time reduce the wear of the contact surface between the saw blade and the transmission shaft, and extend the service life of the transmission shaft.

[0029] The whole set of circular saw blade fixing device adopts 2 fixing clamping pieces with annular buffer grooves arranged on the end faces, a saw blade positioning bushing, a hexagonal nut of M65, and is equipped with a high-temperature resistant rubber pad, wear-resistant and shock-absorbing. It adopts a movable connection, which is easy to replace and maintain in the later stage; the supporting components are processed, welded, heat-treated and other processes. It is required that the surface of the clamping piece is flat and smooth, the welded clamping piece is perpendicular to the saw bed shaft, the hole diameter of the clamping piece is consistent with the diameter of the transmission shaft, and each component is assembled into a tight fit to ensure the effective fixation of the circular saw blade and the saw bed shaft.

[0030] The circular saw blade, the saw blade positioning bushing, the saw blade clamping piece and the transmission shaft are processed from quenched and tempered No. 45 steel to ensure its wear resistance and rapid heat dissipation. No. 45 steel is a high-quality carbon structural steel, corresponding to Japanese standard S45C, American standard: 1045, German standard C45. Its characteristics are that compared with ordinary A3 steel, it has higher strength, anti-deformation ability, good hot and cold processing performance, good mechanical properties, low price and wide source, so it is widely used and is beneficial to the preparation of later samples.

Claims

1. A fixing device for a sawing machine transmission shaft and a circular saw blade, comprising a saw blade, a transmission shaft, a left clamp and a right clamp, wherein the left clamp and the right clamp are annular, the left clamp and the right clamp are clamped on both sides of the saw blade, the left clamp is arranged on the side close to the bearing box, the transmission shaft is passed through the shaft holes of the left clamp, the saw blade and the right clamp, and is characterized in that: An annular saw blade buffer groove (4) is respectively arranged at one end of the left clamp (1) and the right clamp (2) which are in contact with the saw blade (3), and a saw blade buffer pad (5) is arranged in the saw blade buffer groove (4); a saw blade positioning shaft sleeve (7) is sleeved on the outer periphery of the transmission shaft (6), and a rough layer (8) is arranged on the outer wall of the saw blade positioning shaft sleeve (7) to closely contact with the inner wall of the shaft hole of the saw blade (3); and a shaft sleeve buffer groove (10) is respectively arranged at the outer periphery of the shaft hole where the left clamp (1) and the right clamp (2) are in contact with the saw blade positioning shaft sleeve (7), and a shaft sleeve buffer pad (11) is arranged in the shaft sleeve buffer groove (10).

2. The fixing device for a sawing machine transmission shaft and a circular saw blade according to claim 1, characterized in that: The saw blade buffer groove (4), the saw blade positioning shaft sleeve (7) and the shaft sleeve buffer groove (10) are all annular, and the centers of the circles thereof overlap with the center of the circle of the saw blade (3) or the axis of the transmission shaft (6).

3. The fixing device for a sawing machine transmission shaft and a circular saw blade according to claim 1 or 2, characterized in that: A plurality of screw holes (12) are arranged circumferentially on the saw blade (3), the left clamping piece (1) and the right clamping piece (2); a through hole matching the screw hole (12) is penetrated through the saw blade buffer pad (5); and a hexagonal nut (9) is penetrated through the screw hole (12) and the through hole.

4. The fixing device for a sawing machine transmission shaft and a circular saw blade as claimed in claim 3, characterized in that: The outer diameters of the left clamp (1) and the right clamp (2) are 247 mm.

5. The fixing device for a sawing machine transmission shaft and a circular saw blade as claimed in claim 4, characterized in that: The saw blade buffer groove (4) has an inner diameter of 120 mm, an outer diameter of 200 mm, and a depth of 5 mm; the saw blade buffer pad (5) is made of wear-resistant rubber material, and the saw blade buffer pad (5) has an inner diameter of 120 mm, an outer diameter of 200 mm, and a depth of 6 mm.

6. The fixing device for a sawing machine transmission shaft and a circular saw blade as claimed in claim 5, characterized in that: The saw blade positioning sleeve (7) has an inner diameter of 60 mm, an outer diameter of 80 mm and a depth of 5 mm.

7. The fixing device for a sawing machine transmission shaft and a circular saw blade as claimed in claim 6, characterized in that: The verticality tolerance between the end faces of the left clamping piece (1) and the right clamping piece (2) and the transmission shaft (6) is less than 0.04 mm.

8. The fixing device for a sawing machine transmission shaft and a circular saw blade as claimed in claim 7, characterized in that: The shaft sleeve buffer groove (10) has an inner diameter of 60 mm, an outer diameter of 70 mm, and a depth of 5 mm; the shaft sleeve buffer pad (11) is made of wear-resistant rubber material, and has an inner diameter of 60 mm, an outer diameter of 70 mm, and a depth of 6 mm.

9. The fixing device for a sawing machine transmission shaft and a circular saw blade as claimed in claim 8, characterized in that: The saw blade (3), the transmission shaft (6), the left clamping piece (1), the right clamping piece (2) and the saw blade positioning sleeve (7) are all made of quenched and tempered No. 45 steel.

10. The fixing device for a sawing machine transmission shaft and a circular saw blade according to claim 9, characterized in that: The shaft hole of the left clamp (1) is fixedly connected to the transmission shaft (6).

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