CN109954901B

CN109954901B - Novel permanent magnet brushless bench drill

Info

Publication number: CN109954901B
Application number: CN201910284459.1A
Authority: CN
Inventors: 林建辉; 曾信钿
Original assignee: Fujian Weilong Electronic Technology Co Ltd
Current assignee: Fujian Weilong Electronic Technology Co Ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-03-27
Anticipated expiration: 2039-04-10
Also published as: CN109954901A

Abstract

The invention discloses a novel permanent magnet brushless bench drill in the technical field of bench drills, which comprises a bench drill bottom plate, wherein a machine body base is fixedly arranged on the rear side of the top of the bench drill bottom plate, a machine body shell is arranged on the top of the machine body base, a control panel for starting and stopping speed regulation is embedded below the side face of the machine body shell, a lifting sliding table is arranged on the front side wall of the machine body shell, a main shaft lifting handle is arranged above the side face of the machine body shell, a permanent magnet brushless motor is fixedly arranged at the upper end of the front side wall of the lifting sliding table, the bottom power output end of the permanent magnet brushless motor is connected with a bench drill main shaft, a main shaft mounting seat is fixedly arranged at the lower end of the front side wall of the lifting sliding table, a universal clamping table for clamping a machined workpiece is arranged on the front side of the top of the bench drill bottom plate, the universal clamping table is positioned right below the, Convenient and practical's novel brushless bench drill of permanent magnetism.

Description

Novel permanent magnet brushless bench drill

Technical Field

The invention relates to the technical field of bench drills, in particular to a novel permanent magnet brushless bench drill.

Background

A bench drill is a small-sized drilling machine tool which is convenient to operate and usually installed on a special worktable. The traditional bench drill generally adopts an alternating current asynchronous motor as a power motor, and the traditional bench drill is enabled to have the following defects through transmission of a tower type belt pulley:

1. the asynchronous motor works in such a way that a rotor winding absorbs partial electric energy from a power grid for excitation, the electric energy of the power grid is consumed, the partial electric energy is finally consumed in the rotor winding by heating with current, the loss accounts for about 20-30% of the total loss of the motor, the efficiency of the motor is reduced, the rotor excitation current is converted into inductive current after a stator winding, the current in the stator winding lags behind the voltage of the power grid by an angle, and the power factor of the motor is reduced.

2. When starting an asynchronous motor, the motor is required to have a sufficiently large starting torque, but it is desirable that the starting current is not too large so as to prevent the power grid from generating an excessive voltage drop which affects the normal operation of other motors and electrical equipment connected to the power grid. In addition, when the starting current is too large, the motor itself is impacted by the too large power, and if the motor is started frequently, the winding is in danger of overheating. Therefore, the starting design of asynchronous machines often faces dilemma.

3. When the asynchronous motor works, current flows in the rotor winding, and the current is completely consumed in the form of heat energy, so that a large amount of heat is generated in the rotor winding, the depression degree of the motor is increased, and the service life of the motor is influenced.

4. Because the power factor of the asynchronous motor is low, the motor absorbs a large amount of reactive current from the power grid, so that a large amount of reactive current exists in the power grid, John power transformation equipment and power generation equipment, the quality factor of the power grid is further reduced, and the loads of the power grid, gun power transformation equipment and the power generation equipment are increased. At the same time, the reactive current consumes part of the electrical energy in the network, in the power transformation plants and in the power generation plants, which causes the electrical network to become less efficient and thus results in an effective use of the electrical energy. Similarly, because the asynchronous motor has low efficiency, the electric energy must be absorbed from the power grid more to meet the demand of the output power, so that the loss of the two energies of electricity is further increased, and the load of the power grid is increased.

5. The speed change of the drill floor is realized through a tower type belt pulley, only the speed regulation of limited stages can be realized, and the application of the bench drill with single function and great limitation is realized.

6. Traditional bench drill generally only is provided with fixed work piece clamping platform, and traditional work piece clamping platform only can realize simple lift adjustment, and the operation degree of difficulty is big when actually processing the work piece if need drill on a plurality of lateral inclined planes of work piece.

Based on the above, the invention designs a novel permanent magnet brushless bench drill to solve the above problems.

Disclosure of Invention

The invention aims to provide a novel permanent magnet brushless bench drill to solve the technical problem.

In order to achieve the purpose, the invention provides the following technical scheme: a novel permanent magnet brushless bench drill comprises a bench drill bottom plate, wherein a machine body base is fixedly arranged on the rear side of the top of the bench drill bottom plate, a machine body shell is arranged on the top of the machine body base, a control panel for starting, stopping and speed regulating is embedded below the side face of the machine body shell, a lifting sliding table is arranged on the front side wall of the machine body shell, a main shaft lifting handle for controlling the lifting sliding table to lift and move is arranged above the side face of the machine body shell, a permanent magnet brushless motor is fixedly arranged at the upper end of the front side wall of the lifting sliding table, the bottom power output end of the permanent magnet brushless motor is connected with a bench drill main shaft, and a main shaft mounting seat for assisting in fixing the bench drill main shaft is fixedly arranged at;

the top front side of bench drill bottom plate is provided with the universal centre gripping platform that is used for the clamping to process the work piece, universal centre gripping platform is located under the bench drill main shaft, universal centre gripping platform include the bench vice and set up in the universal adjustment mechanism of bench vice bottom.

Preferably, universal adjustment mechanism includes the upper fixed plate and the bottom plate of circular structure, the vertical regulation support column that is connected with in centre of a circle position between upper fixed plate and the bottom plate, it divide into two sections from top to bottom to adjust the support column, and close the connection through universal ball hinge, the top of bottom plate and with the bottom plate is provided with annular slide rail with one heart, the top swing joint of annular slide rail has adjusting block, the bottom of upper fixed plate and adjusting block's top is equallyd divide and is do not articulated through articulated seat have adjusting screw, upper and lower both sides the spiro union is provided with connecting sleeve, upper and lower both sides between the adjusting screw is located the equal rigid coupling of connecting sleeve inner chamber one end has spacing separation blade.

Preferably, the connecting sleeve comprises an upper half sleeve and a lower half sleeve which are consistent in structure, the opposite ends of the upper half sleeve and the lower half sleeve are provided with connecting flanges, and the end faces of the opposite ends of the upper half sleeve and the lower half sleeve are provided with threaded holes matched with the adjusting screws.

Preferably, the diameter of the threaded hole is smaller than the diameter of the half sleeve and the diameter of the limiting blocking piece.

Preferably, the outer wall of the adjusting screw positioned above is screwed with a locknut.

Preferably, the side surface of the adjusting slide block is connected with a locking handle in a penetrating and threaded mode.

Preferably, the rear side of the machine body shell is provided with a machine body handle, and the machine body handle is made of a silicone rubber material.

Preferably, T-shaped grooves are formed in the top of the upper fixing plate in parallel at equal intervals, and the bench vice is detachably mounted and connected with the T-shaped grooves through bolts.

Compared with the prior art, the invention has the beneficial effects that:

1. after the permanent magnet is embedded on the rotor of the permanent magnet synchronous motor, the permanent magnet establishes a rotor magnetic field, the rotor and a stator magnetic field run synchronously in normal work, no induced current exists in the rotor, no rotor resistance loss exists, and only one can improve the motor efficiency by 4-50%. Because no induced current is excited in the rotor of the water-magnetic motor, the stator winding can be in pure resistance load, so that the power factor of the motor is almost 1, the motor has wide application range and high operation efficiency (more than 80%).

2. The permanent magnet synchronous motor generally adopts an asynchronous starting mode, and because the rotor winding does not work when the permanent magnet synchronous motor works normally, the rotor winding can completely meet the requirement of high starting torque when the permanent magnet motor is designed, for example, the starting torque multiple is increased from 1.8 times to 2.5 times of the asynchronous motor, and even is larger, so that the phenomenon of 'big horse-drawn trolley' in power equipment is better solved.

3. Because the permanent magnet motor has high efficiency, no resistance loss exists in the rotor winding, and less or almost no reactive current exists in the stator winding, the temperature rise of the motor is low, and the service life of the motor is prolonged.

4. The permanent magnet motor rotor is free of induced current excitation, the power factor of the motor is high, the quality factor of a power grid is improved, and a compensator is not required to be installed in the power grid. Meanwhile, due to the high efficiency of the permanent magnet motor, electric energy is saved.

5. The motor is adopted for direct drive, and a tower type belt pulley can be directly omitted in the structure, so that the efficiency of the whole machine is improved. Meanwhile, the brushless motor is adopted to realize wide-range speed regulation. The traditional bench drill can be used for drilling holes and can also be used for application scenes of products greatly expanded such as tapping and coring.

6. The universal clamping table for clamping the machined workpiece is arranged on the front side of the top of the bench drill bottom plate and comprises a bench vice and a universal adjusting mechanism arranged at the bottom of the bench vice, and the universal adjusting mechanism can be used for correspondingly adjusting according to the special position relation between the required machined surface and the workpiece mounting surface, so that the workpiece clamping and machining difficulty can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the structure of the universal adjusting mechanism of the present invention;

FIG. 3 is a schematic view of the connecting sleeve mounting structure of the present invention;

FIG. 4 is a schematic view of the construction of the coupling sleeve of the present invention;

fig. 5 is a schematic structural view of an upper fixing plate according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-bench drill bottom plate, 2-machine body base, 3-machine body shell, 4-control panel, 5-lifting sliding table, 6-main shaft lifting handle, 7-permanent magnet brushless motor, 8-bench drill main shaft, 9-main shaft mounting seat, 10-universal clamping table, 11-bench vice, 12-universal adjusting mechanism, 13-locking handle, 14-machine body handle and 15-T-shaped groove;

121-an upper fixing plate, 122-a lower fixing plate, 123-an adjusting supporting column, 124-an annular sliding rail, 125-an adjusting sliding block, 126-a hinge seat, 127-an adjusting screw rod, 128-a connecting sleeve, 1281-a half sleeve, 1282-a connecting flange, 1283-a threaded hole, 129-a limiting baffle and 1210-a locknut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a novel permanent magnet brushless bench drill comprises a bench drill bottom plate 1, a machine body base 2 is fixedly arranged on the rear side of the top of the bench drill bottom plate 1, a machine body shell 3 is arranged on the top of the machine body base 2, a control panel 4 for starting and stopping speed regulation is embedded below the side surface of the machine body shell 3, a lifting sliding table 5 is arranged on the front side wall of the machine body shell 3, a main shaft lifting handle 6 for controlling the lifting sliding table 5 to lift and move is arranged above the side surface of the machine body shell 3, a permanent magnet brushless motor 7 is fixedly arranged at the upper end of the front side wall of the lifting sliding table 5, a bench drill main shaft 8 is connected with the bottom power output end of the permanent magnet brushless motor 7, a main shaft mounting seat 9 for assisting the fixing of the bench drill main shaft 8 is fixedly arranged at the lower end of the front side wall of the lifting sliding table 5, a universal clamping table 10 for clamping and processing workpieces is, the universal clamping table 10 comprises a bench vice 11 and a universal adjusting mechanism 12 arranged at the bottom of the bench vice 11;

furthermore, the universal adjusting mechanism 12 includes an upper fixing plate 121 and a lower fixing plate 122 which are circular in structure, a circle center position between the upper fixing plate 121 and the lower fixing plate 122 is vertically connected with an adjusting support column 123, the adjusting support column 123 is divided into an upper section and a lower section and is hinged through a universal ball hinge, an annular slide rail 124 is concentrically arranged on the top of the lower fixing plate 122 and the lower fixing plate 122, the top of the annular slide rail 124 is movably connected with an adjusting slider 125, the bottom of the upper fixing plate 121 and the top of the adjusting slider 125 are respectively hinged through a hinge seat 126 with an adjusting screw 127, a connecting sleeve 128 is screwed between the adjusting screw 127 on the upper side and the lower side, one end of the adjusting screw 127 on the upper side and the lower side, which is located in an inner cavity of the connecting sleeve 128, is fixedly connected with a;

further, the connecting sleeve 128 comprises an upper half sleeve 1281 and a lower half sleeve 1281 which are consistent in structure, a connecting flange 1282 is arranged at one opposite end of the upper half sleeve 1281 and the lower half sleeve 1282, and a threaded hole 1283 matched with the adjusting screw 127 is formed in the end face of the opposite end of the upper half sleeve 1281 and the lower half sleeve 1281, so that the structural assembly is facilitated;

further, the diameter of the threaded hole 1283 is smaller than the diameter of the half sleeve 1281 and the diameter of the limit stop piece 129, so that the function of preventing the adjusting screw 127 from being separated from the connecting sleeve 128 is achieved;

further, the outer wall of the adjusting screw 127 positioned above is screwed with a locknut 1210, and the locknut 1210 is abutted with the connecting sleeve 128 to play a role in locking and positioning;

further, a locking handle 13 is screwed through the side surface of the adjusting slider 125 and is used for fixing the position of the adjusting slider 125 on the annular slide rail 124;

furthermore, a machine body handle 14 is arranged at the rear side of the machine body shell 3, and the machine body handle 14 is made of a silicone rubber material, so that an effective insulating and anti-skidding effect can be achieved;

further, T type groove 15 has been seted up side by side to the top equidistance of upper fixed plate 121, and bench vice 11 passes through the bolt to be connected with T type groove 15 demountable installation for the dismouting of being convenient for of bench vice 11 can be lifted off bench vice 11 when the bench drill is used for the great work piece of machining dimension.

One specific application of this embodiment is:

example 1:

the invention relates to a novel permanent magnet brushless bench drill, which can be used by the following steps: the invention relates to a novel permanent magnet brushless bench drill, which adopts a permanent magnet brushless motor as a driving motor and avoids a traditional tower type belt pulley speed change mechanism; the permanent magnet brushless motor has the following advantages:

1. after the permanent magnet is embedded on the rotor of the permanent magnet synchronous motor, the permanent magnet establishes a rotor magnetic field, the rotor and a stator magnetic field run synchronously in normal work, no induced current exists in the rotor, no rotor resistance loss exists, and only one can improve the motor efficiency by 4-50%. Because no induced current excitation exists in the rotor of the water-magnetic motor, the stator winding can be in pure resistive load, so that the power factor of the motor is almost 1, the motor has wide application range and the operation efficiency is higher than 80%.

In addition, the motor is directly used for driving, and a tower type belt pulley can be directly omitted in the structure, so that the efficiency of the whole machine is improved. Meanwhile, the brushless motor is adopted to realize wide-range speed regulation. The traditional bench drill can be used for drilling holes and can also be used for application scenes of products greatly expanded such as tapping and coring.

Example 2:

the universal clamping table 10 for clamping a machined workpiece is arranged on the front side of the top of the bottom plate 1 of the bench drill, the universal clamping table 10 comprises a bench vice 11 and a universal adjusting mechanism 12 arranged at the bottom of the bench vice 11, corresponding adjustment can be carried out according to the special position relation between a required machined surface and a workpiece mounting surface through the universal adjusting mechanism 12, and the workpiece clamping and machining difficulty can be effectively reduced.

Specifically, when the inclination angles of the bench vice 11 and the upper fixing plate 121 are adjusted, the locknut 1210 is firstly unscrewed, and then the connecting sleeve 128 is rotated, so that the distance between the upper and lower adjusting screws 127 is changed, that is, the total length of the upper and lower adjusting screws 127 is changed, so that the upper fixing plate 121 can rotate for a certain angle around the universal ball hinge on the adjusting support column 123, and the inclination angle adjustment effect is realized, after the inclination angle adjustment is finished, the locknut 1210 is screwed again to be locked, and if the precision requirement of a processing workpiece is higher, the auxiliary adjustment can be performed by means of an external angle measuring instrument; when the positions of the bench vice 11 and the upper fixing plate 121 are adjusted, the locking handle 13 is firstly unscrewed, so that the adjusting slider 125 can freely slide on the annular slide rail 124, in order to ensure the manufacturing feasibility of the annular slide rail 124, the annular slide rail 124 can be formed by splicing two semicircular arc slide rails, the inclined surface of the upper fixing plate 121 can be adjusted to any required position by freely sliding on the annular slide rail 124 through the adjusting slider 125, after the position adjustment is finished, the locking handle 13 is locked again, if the precision requirement of a processed workpiece is higher, the customized annular slide rail 124 can be selected, and the scale marks on the annular slide rail 124 can be used as the reference of the position angle.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel brushless bench drill of permanent magnetism, includes bench drill bottom plate (1), its characterized in that: the bench drill comprises a bench drill base plate (1), a machine body base (2) is fixedly arranged on the rear side of the top of the bench drill base plate (1), a machine body shell (3) is arranged on the top of the machine body base (2), a control panel (4) for starting and stopping speed regulation is embedded below the side face of the machine body shell (3), a lifting sliding table (5) is arranged on the front side wall of the machine body shell (3), a main shaft lifting handle (6) for controlling the lifting sliding table (5) to lift and move is arranged above the side face of the machine body shell (3), a permanent magnet brushless motor (7) is fixedly arranged at the upper end of the front side wall of the lifting sliding table (5), the bottom power output end of the permanent magnet brushless motor (7) is connected with a bench drill main shaft (8), and a main shaft mounting seat (9) for assisting in fixing the bench drill main shaft;

a universal clamping table (10) used for clamping a machined workpiece is arranged on the front side of the top of the bench drill bottom plate (1), the universal clamping table (10) is located right below the bench drill spindle (8), and the universal clamping table (10) comprises a bench vice (11) and a universal adjusting mechanism (12) arranged at the bottom of the bench vice (11);

the universal adjusting mechanism (12) comprises an upper fixing plate (121) and a lower fixing plate (122) which are of circular structures, an adjusting supporting column (123) is vertically connected at the position of the circle center between the upper fixing plate (121) and the lower fixing plate (122), the adjusting supporting column (123) is divided into an upper section and a lower section, and is hinged and connected through a universal ball hinge, the top of the lower fixed plate (122) and the lower fixed plate (122) are concentrically provided with an annular slide rail (124), the top of the annular slide rail (124) is movably connected with an adjusting slide block (125), the bottom of upper fixed plate (121) and the top of adjusting slider (125) are equallyd divide and are articulated respectively through articulated seat (126) have adjusting screw (127), both sides from top to bottom the spiro union is provided with connecting sleeve (128) between adjusting screw (127), both sides from top to bottom adjusting screw (127) are located connecting sleeve (128) equal rigid coupling in inner chamber one end has spacing separation blade (129).

2. The novel permanent magnet brushless bench drill of claim 1, characterized in that: the connecting sleeve (128) comprises an upper half sleeve and a lower half sleeve (1281) which are consistent in structure, a connecting flange (1282) is arranged at one opposite end of each of the upper half sleeve and the lower half sleeve (1281), and a threaded hole (1283) matched with the adjusting screw rod (127) is formed in the end face of the opposite end of each of the upper half sleeve and the lower half sleeve (1281).

3. The novel permanent magnet brushless bench drill of claim 2, characterized in that: the diameter of the threaded hole (1283) is smaller than the diameter of the half sleeve (1281) and the diameter of the limiting baffle plate (129).

4. The novel permanent magnet brushless bench drill of claim 1, characterized in that: the outer wall of the adjusting screw rod (127) positioned above is in threaded connection with a locknut (1210).

5. The novel permanent magnet brushless bench drill of claim 1, characterized in that: the side surface of the adjusting sliding block (125) is connected with a locking handle (13) in a penetrating and screwed mode.

6. The novel permanent magnet brushless bench drill of claim 1, characterized in that: the rear side of the machine body shell (3) is provided with a machine body handle (14), and the machine body handle (14) is made of a silicone rubber material.

7. The novel permanent magnet brushless bench drill of claim 1, characterized in that: t type groove (15) have been seted up side by side to the top equidistance of upper fixed plate (121), bench vice (11) through the bolt with T type groove (15) demountable installation is connected.