Cutting angle grinder for steel structure installation

Abstract

The utility model discloses a cutting angle grinder for mounting a steel structure, which belongs to the technical field of metal material processing and comprises a grinder body, a grinder head, a safety shield, a grinder body handrail and a power cord, and a stepless speed regulation knob is arranged at the tail of the grinder body and used for regulating the rotating speed of a cutting blade; an upper stop steel ball and a lower stop steel ball are arranged on the machine body handrail and are elastically clamped and locked with a locking groove formed in a handrail insertion hole of the machine head; an annular fixing buckle is arranged on the safety shield, and the safety shield is locked and fixed through a quick release handle, a fastening screw rod and an adjusting bolt. According to the utility model, by adjusting the cutting speed and arranging the quick adjusting mechanism for the mounting direction and angle of the machine body handrail and the safety shield, the adjustment work can be quickly finished by one hand according to different cutting and welded junction polishing angles and directions; and the convenience of the angle grinder in the high-altitude installation work of the steel structure and the safety of equipment and operators are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material processing, and particularly relates to a cutting angle grinder for steel structure installation. Background Art

[0002] An angle grinder is a widely used handheld power tool, mainly composed of a body, a motor, a right-angle reduction mechanism, a mounting shaft, a cutting disc, a grinding wheel disc or a polishing disc, a handle and a protective cover, etc. The machine uses the motor as the power source to drive the cutting disc, grinding wheel disc or polishing disc on the mounting shaft to rotate at high speed. The handle is convenient for the operator to hold and ensures the stability of the operation. The protective cover can prevent the grinding wheel disc from breaking or the debris generated during the cutting process from splashing, protecting the safety of the operator.

[0003] In the installation of steel structures, various metal profiles, pipes and metal plates are often required. The angle grinder can be paired with a cutting disc to cut steel pipes to obtain appropriate dimensions, and can be paired with a grinding disc and a polishing disc to polish the structure surface and welds, which is beneficial to the adhesion of the subsequent anti-corrosion coating. During the installation process of steel structures, when a large number of steel structure prefabricated parts are hoisted at high altitude, it is frequently used in construction such as minor dimensional adjustments caused by the completion of the temporary modification plan, rust removal of welding parts, and cleaning of welds, and it is the preferred convenient power tool.

[0004] At the same time, the safety of the angle grinder in high-altitude installation operations is also an issue that cannot be ignored. Most existing angle grinders use a constant-speed motor. When it comes to some parts that require low-speed cutting or grinding, the speed cannot be adjusted. Especially in high-altitude operation scenarios, the excessive speed of the machine cannot accurately control the quality of the processing parts, and it is also difficult for the operator to hold and control the body. At the same time, due to the problems of adjusting the angle of the protective cover by the spiral cooperation of the handle and the screw hole and the necessity of using special tools, these are all technical problems that should be taken seriously in high-altitude operations. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a cutting angle grinder for steel structure installation, which can effectively solve the problems put forward in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A cutting angle grinder for steel structure installation includes a body, a machine head, a safety guard, a body armrest, and a power cord. An infinitely variable speed knob is provided at the tail of the body for adjusting the rotation speed of the cutting disc; upper and lower detent balls are provided on the body armrest and are inserted and locked with the locking grooves in the armrest insertion holes provided on the machine head; an annular fixed buckle is provided on the safety guard and is locked and fixed by a quick-release handle.

[0008] Preferably, the stepless speed regulation knob provided at the tail of the fuselage is coaxially and tightly sleeved with the potentiometer adjusting rod of the speed regulator housing.

[0009] Preferably, speed indication graduation lines are provided on the plane at the tail of the fuselage corresponding to the stepless speed regulation knob for marking the rotational speed of the cutting disc.

[0010] Preferably, a through hole with a diameter 0.5 mm larger than the diameters of the upper and lower stop steel balls is provided radially at the connecting plug part of the armrest of the fuselage and the armrest jacks provided on both sides of the machine head for installing the steel ball spring and the steel balls at both ends. After installation in place, the edges of the through holes at both ends are punched using a punching machine and a cylindrical punching die so that the steel balls at both ends have elastic locking characteristics.

[0011] Preferably, a round-bottomed annular locking groove with a D-shaped cross-section is provided in the armrest jacks provided on both sides of the machine head and the armrest of the fuselage.

[0012] Preferably, at the joint of the annular fixed buckle provided on the safety guard and the inner edge of the machine head, two symmetrically stamped and formed safety guard limit anti-disengagement convex keys are provided. The quick-release handle is a hand-operated structure with an eccentric through hole, and a fastening screw and an adjusting bolt are provided thereon.

[0013] The utility model has the following beneficial effects:

[0014] 1. The body motor is provided with a stepless speed regulation circuit. By combining the stepless speed regulation knob with the speed indication graduation lines, a control means for the rotational speed of the cutting disc is provided for the operator. The operator can, according to the characteristics of different steel structure materials (such as hardness, thickness, etc.) and specific cutting process requirements (such as cutting accuracy, surface roughness, etc.), by referring to the speed indication graduation lines, rotate the stepless speed regulation knob to a suitable position, so as to obtain the required optimal rotational speed of the cutting disc. This speed control method can not only effectively improve the cutting quality, make the cutting surface more flat and smooth, but also reduce material waste to a certain extent, reduce construction costs, improve economic benefits, and at the same time, because the rotational speed is appropriate, the vibration of the fuselage will be reduced and the safety of the operator will be improved.

[0015] 2. With the quick plug-in installation mechanism of the fuselage armrest, the operator can simply install the single-hand armrest on both sides of the machine head. Whether performing forward and reverse cutting operations in the horizontal direction or adapting to cutting and grinding operations at other angles, the fuselage and the machine head can be quickly adjusted to the most suitable holding position, effectively reducing the coordination difficulty of both hands during the operation process and greatly improving the work efficiency.

[0016] 3. The safety shield is equipped with a locking mechanism for quickly adjusting the angle, and its angle can be adjusted rapidly through a quick-release handle according to actual cutting requirements. While ensuring the safety protection effect, it will not block the operator's line of sight and will not interfere with the operator's operation flexibility. Whether it is for straight cutting on a plane or facing complex bevel cutting and weld grinding operations, the angle of the safety shield can be quickly adjusted to provide safety protection for the cutting process, ensuring the smooth progress of cutting and grinding operations and the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0020] Figure 4 is Figure 3 a partially enlarged view of the armrest socket A in

[0021] Figure 5 is a schematic diagram of the speed governor part of the present utility model;

[0022] Figure 6 is a schematic diagram of the armrest part of the present utility model;

[0023] Figure 7 is a schematic exploded view of the parts of the armrest part of the present utility model;

[0024] Figure 8 is a schematic three-dimensional structure diagram of the safety shield part of the present utility model;

[0025] Figure 9 is a front plan view of the safety shield part of the present utility model.

[0026] In the figure: 1. Machine body, 2. Machine head, 3. Safety guard, 4. Machine body armrest, 401. Upper stop steel ball, 402. Steel ball spring, 403. Lower stop steel ball, 404. Inner tube of machine body armrest, 405. Outer sleeve of machine body armrest, 5. Power cord, 6. Cutting disc, 7. Cutting disc disc fastening screw, 8. Disassembly and assembly card hole, 9. Strip-shaped heat dissipation hole, 10. Stepless speed regulation knob, 1001. Speed regulator wiring terminal, 1002. Speed regulator housing, 1003. Potentiometer adjusting rod, 1004. Interdigitated radiator, 11. Combined hanging hole, 12. Power plug, 13. Power switch, 14. Shaft lock button, 15. Safety cover limit anti-disengagement groove, 16. Cutting disc mounting shaft, 17. Armrest jack, 1701. Locking groove, 18. Ring-shaped fixing buckle, 19. Quick-release handle, 20. Safety cover limit anti-disengagement convex key, 21. Tightening screw rod, 22. Adjusting bolt. Detailed implementation mode

[0027] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with the specific implementation modes.

[0028] Please refer to Figures 1 to 3 As shown, this embodiment describes a cutting angle grinder for steel structure installation, including a machine body 1, a machine head 2, a safety guard 3, a machine body armrest 4, and a power cord 5.

[0029] Furthermore, an alternating current series-excited motor is provided inside the machine body 1 to provide rotational power for the cutting disc. The machine body is made of engineering plastic, lightweight alloy or aluminum alloy material. The outer surface of the machine body is provided with raised vertical grooves or patterns that are beneficial for the operator to hold, preventing accidental dropping due to mechanical vibration during high-altitude use. The machine body and the machine head are tightly connected by a lengthened screw rod. A strip-shaped heat dissipation hole 9 is provided at the tail of the machine body 1 for the motor to dissipate heat, ensuring the continuous and stable operation of the machine.

[0030] Furthermore, the outer shell of the machine head 2 is die-cast from lightweight alloy or aluminum alloy. An angular power output part composed of a gearbox, a bevel gear set, and bearings is provided inside. At the same time, a cutting disc mounting shaft 16 and a cutting disc fastening screw 7 with a disassembly and assembly card hole 8 are provided for pressing and installing the cutting disc 6.

[0031] Furthermore, as Figure 1 , Figure 5As shown in the figure, a stepless speed regulation knob 10 is provided at the tail of the fuselage 1, which is coaxially and tightly sleeved with a potentiometer adjusting rod 1003 provided on the speed regulator housing 1002. Multiple speed indication scale lines are provided at the tail of the fuselage 1. Combined with the chamfered end of the stepless speed regulation knob 10, it is used to display the set speed of the machine. The speed regulator is an AC stepless speed regulator with a bidirectional thyristor as a power device. A speed regulator wiring terminal 1001 is provided on the speed regulator housing 1002 for connecting the power switch 13 and the motor. A finger-type radiator 1004 is provided at the rear of the speed regulator housing 1002 for dissipating heat from the internal power devices of the speed regulator to protect the long-term stable operation of the speed regulator; when applied to light steel members or weld grinding, the speed of the cutting disc 6 is adjusted according to the usage scenario, so that the processing part meets the design requirements, while reducing excessive vibration of the machine, which is conducive to the safe and stable operation of the staff.

[0032] Further, as Figure 1 , Figure 2 , Figure 8 , Figure 9 shown, the safety guard 3 is made of steel metal sheet by stamping. An extended part that locally wraps the outer edge of the cutting disc 6 inward is provided at the front edge of the safety guard 3, and it maintains an equal distance of 5-8 mm from the cutting disc 6 to ensure that there is no mutual friction with the cutting disc 6. An annular fixing buckle 18 that is slightly larger than the output bearing seat part of the machine head 2 is provided at the center of the safety guard 3. The annular fixing buckle 18 and the safety guard 3 are an integral stamping structure. A safety guard limit anti-disengagement convex key 20 is provided on the inner ring surface of the annular fixing buckle 18 for cooperating with a safety guard limit anti-disengagement groove 15 provided on the output bearing seat of the machine head 2 to prevent the accidental disengagement of the safety guard 3; a fastening screw hole is provided at the opening of the annular fixing buckle 18, and a quick opening / locking mechanism with a quick release handle 19 is provided thereon, which is used to quickly and freely adjust the setting angle of the safety guard 3 with one hand according to the angle and direction changes of the workpiece during high-altitude installation operations.

[0033] Further, Figure 3 , Figure 4 , Figure 6 , Figure 7 shown, the fuselage armrest 4 includes an inner tube 404 and an outer sleeve 405 of the fuselage armrest. The installation of this device changes the existing screw and screw hole installation structure, and adopts a quick plug-in plus elastic double steel ball locking design. Combined with two armrest jacks 17 and locking grooves 1701 provided on the side of the machine head 2, the locking and removal of the fuselage armrest 4 are realized, which is convenient to freely adjust the left and right installation directions of the fuselage armrest 4 with one hand according to the angle and direction changes of the workpiece, so as to firmly hold the fuselage and ensure the safety of the tool and the operator.

[0034] Further, the body armrest 4 is connected to the plug part of the armrest jack 17 provided on both sides of the machine head 2. Radially, there is a through hole with a diameter 0.5 mm larger than the diameters of the upper stop ball 401 and the lower stop ball 403 for installing the ball spring 402 and the balls at both ends. After installation, a stamping machine and a cylindrical stamping die are used to stamp the edges of the through holes at both ends to limit the degree of ball ejection, prevent the balls from popping out under the action of the ball spring 402, and at the same time endow the balls at both ends with elastic locking characteristics, ensuring reliable mutual locking between the body armrest 4 and the armrest jack 17.

[0035] Further, the power cord 5 is designed as a common two-wire single-phase power cord, and is provided with a power plug 12 thereon, facilitating quick plugging and power taking with a conventional power socket; at the joint of the power cord 5 and the body 1, there is a combined hanging hole 11 for temporarily hanging the machine and some small maintenance tools such as a cutting disc installation wrench, preventing loss during high-altitude operations.

[0036] Usage process:

[0037] 1. Connect the machine to the power supply through the power cord 5 and the power plug 12, and then the cutting, grinding, and polishing work can be carried out conventionally.

[0038] 2. When cutting or grinding the weld of thin and light profiles or structural parts, the speed regulation function of the machine can be enabled according to the usage scenario. At this time, according to the need, adjust the stepless speed regulation knob 10 provided at the tail of the body 1, start the machine through experiments, determine the appropriate speed, and achieve the ideal usage effect.

[0039] 3. On the premise that it is inconvenient to construct at high altitude, when the cutting and grinding angles are not conducive to holding the machine, the body armrest 4 can be pulled out slightly outward with a little force, replaced and installed on the armrest jack 17 provided on the other side of the body 1. Hold the body armrest 4 tightly with one hand, align it with the armrest jack 17 on the other side, and press down slightly. When hearing or feeling the "click" locking action or sound of the ball, the replacement of the position of the body armrest 4 can be completed, solving the problem of improper operation angle.

[0040] 4. In some specific usage environments, when the angle of the safety guard 3 needs to be adjusted, the quick-release handle 19 provided on the annular fixed buckle 18 is pulled outward with one hand to release the fastening screw 21. Due to the mutual limitation between the safety guard limit anti-disengagement convex key 20 and the locking groove 1701 provided on the outer edge of the power output bearing seat of the machine head 2, the installation angle of the safety guard 3 can be quickly adjusted without removing the safety guard 3, and then the quick-release handle 19 is pressed to complete the mutual locking between the safety guard 3 and the machine head 2.

[0041] 5. When it is necessary to replace the cutting disc or grinding and polishing disc, lock the mounting shaft by pressing the shaft lock button 14 and perform the replacement operation with a special wrench.

[0042] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A cutting angle grinder for steel structure installation, comprising a machine body (1), a machine head (2), a safety shield (3), a machine body handrail (4), and a power cord (5), characterized in that: The rear of the machine body (1) is provided with a stepless speed regulating knob (10), which is used to adjust the rotation speed of the cutting blade (6); the machine body armrest (4) is provided with an upper stop steel ball (401) and a lower stop steel ball (403), and the machine body armrest (4) is elastically locked with a locking groove (1701) in an armrest insertion hole (17) provided in the machine head (2); the safety shield (3) is provided with an annular fixing buckle (18), and the safety shield (3) and the machine head (2) are locked and fixed by a quick release handle (19).

2. A cutting angle grinder for steel structure installation according to claim 1, characterized in that: The rear part of the body (1) is provided with a stepless speed regulating knob (10), which is coaxially sleeve-tightly connected to a potentiometer regulating rod (1003) of a speed regulator housing (1002).

3. A cutting angle grinder for steel structure installation according to claim 2, characterized in that: A speed indicating scale line is provided on the tail plane of the machine body corresponding to the stepless speed regulating knob (10) provided at the tail of the machine body (1) for indicating the rotation speed of the cutting blade.

4. The cutting angle grinder for steel structure installation according to claim 1, characterized in that: The plug part connecting the body armrest (4) and the armrest jacks (17) on both sides of the head (2) is radially provided with a through hole with a diameter 0.5 mm larger than the diameter of the upper stop steel ball (401) and the lower stop steel ball (403), which is used to install the steel ball spring (402) and the steel balls at both ends. After installation, a punching machine and a cylindrical punching die are used to punch the edges of the through holes at both ends so that the steel balls at both ends have elastic locking characteristics.

5. A cutting angle grinder for steel structure installation according to claim 4, characterized in that: The armrest insertion holes (17) provided on both sides of the machine body armrest (4) and the machine head (2) are provided with round-bottomed annular locking grooves (1701) with a D-shaped cross section.

6. The cutting angle grinder for steel structure installation according to claim 1, characterized in that: Two stamped, symmetrical safety cover limit anti-dropping convex keys (20) are provided at the junction of the annular fixing buckle (18) provided on the safety cover (3) and the inner edge of the machine head (2). The quick-release handle (19) is a hand-operated structure with an eccentric through hole, and is provided with a fastening screw (21) and an adjusting bolt (22).

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