High-stability vertical drilling machine head capable of conveniently reducing size

Abstract

The high-stability vertical drilling machine head comprises a spindle box and a supporting frame, a mounting groove is formed in the center of the top of the spindle box, an electric spindle is fixed to the position, on one side of the mounting groove, of the spindle box, and a motor base support is arranged at the top of the spindle box; the motor base support stretches across the mounting groove and is located in the middle of the mounting groove, the central axis of the motor base support is located in the center of the mounting groove, a motor base is fixed to the motor base support, a servo motor is fixed to the top of the motor base, and a lead screw is fixed to a driving shaft of the servo motor. The lead screw is vertically arranged in the mounting groove, the central axis of the lead screw and the central axis of the motor base support are located on the same vertical line, a rod body of the lead screw is sleeved with a threaded sleeve block, the supporting frame is movably connected with the spindle box and fixedly connected with the threaded sleeve block, and the device is small in size and high in stability.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical processing equipment, and more specifically, to a vertical drilling head that is easy to reduce in size and has high stability. Background Art

[0002] The vertical drill head is the main working part of the vertical drill machine. The small size of the vertical drill head can make the overall machine structure more compact, save equipment installation space, and improve the flexibility and efficiency of the machine layout. The stability of the vertical drill head affects the processing accuracy and efficiency.

[0003] In the related technology, the vertical drilling head usually includes a spindle box, a spindle rotatably arranged on the spindle box, and a first servo motor located on one side. The servo motor drives the spindle to rotate to realize processing of the workpiece. In order to make the processing stable, a supporting frame structure is usually provided to press and fix the workpiece and support the drill bit. The supporting frame structure includes a supporting frame, a screw and a second servo motor. The supporting frame is movably arranged on the side of the spindle away from the first servo motor. Since the first servo motor, the spindle and the supporting frame are installed at different vertical positions of the spindle box, the overall volume of the spindle box is relatively large. In order to reduce the volume, the screw is vertically rotatably arranged on the supporting frame. The second servo motor is fixedly connected to the top of the supporting frame and connected to the screw to drive the screw to rotate. The spindle box is fixed with a threaded sleeve block, which is sleeved on the screw. The screw is driven to rotate by the second servo motor, so that the screw moves up and down inside the nut sleeve block to realize the up and down movement of the supporting frame to press the workpiece.

[0004] By adopting the above-mentioned related technologies, the second servo motor, the support frame and the screw make the overall weight of the support frame structure heavier. The support frame structure is supported by the threaded sleeve so that the force point of the spindle box is concentrated at one point. During the movement of the support frame structure, the spindle box is unevenly stressed, which makes the vertical drilling head less stable and easily causes the overall shaking of the machine tool, affecting the processing accuracy and efficiency. Utility Model Content

[0005] In order to solve the problem in the related art that the spindle box is subjected to uneven force during the movement of the supporting frame structure, resulting in poor stability of the vertical drilling head and easy shaking of the entire machine tool, affecting the processing accuracy and efficiency, the present application provides a vertical drilling head that is easy to reduce in size and has high stability.

[0006] A vertical drilling rig head which is easy to reduce in size and has high stability, comprises a spindle box and a supporting frame, a mounting groove is arranged at the center position of the top of the spindle box, an electric spindle is fixed to the spindle box on one side of the mounting groove, a motor seat bracket is arranged on the top of the spindle box, the motor seat bracket spans the mounting groove and is located in the middle position of the mounting groove and its axis line is located at the center of the mounting groove, a motor seat is fixed to the motor seat bracket, a servo motor is fixed to the top of the motor seat, a screw rod is fixed to the driving shaft of the servo motor, the screw rod is erected in the mounting groove and its axis line is on the same vertical line as the center axis of the motor seat bracket, a threaded sleeve block is sleeved on the shaft of the screw rod, and the supporting frame is movably connected to the spindle box and fixedly connected to the threaded sleeve block.

[0007] By adopting the above technical scheme, the electric spindle is directly driven by the built-in electric motor. Compared with the mechanical transmission method, it is small in size and has higher rotation accuracy and stability, which is helpful to improve the processing quality and product precision. The electric spindle saves the installation space of the spindle box, which is convenient for the support frame structure to have a larger installation space. The servo motor is fixed to the spindle box and supported by the motor seat bracket. The method of replacing the servo motor installed on the support frame makes the support frame lighter. The screw rod and the support frame are installed by avoiding the installation groove. The screw rod is in the center of the spindle box. The support frame is supported by the screw rod and the weight is transferred to the motor seat bracket through the screw rod. The central axis of the motor seat bracket and the central axis of the screw rod are both in the center of the installation groove, so that the motor seat bracket evenly distributes the weight on the parts of the spindle box on both sides of the installation groove, so that the spindle box is evenly stressed, and the head is relatively stable as a whole, which is convenient for reducing the shaking of the machine tool during the activity of the support frame to affect the processing accuracy and efficiency, and achieve good stability while keeping the vertical drilling head small.

[0008] Preferably, the spindle box includes a split box A and a split box B, a side surface of the split box A is provided with a first side groove running through the top thereof, and a side surface of the split box B is provided with a second side groove running through the top thereof, the split box A and the split box B are fixed by bolt connection and the first side groove and the second side groove are combined to form a mounting groove, the motor seat bracket is arranged at the top of the split box A, and the split box B is provided with a mounting sleeve on the side away from the split box A, and the electric spindle is fixed in the mounting sleeve.

[0009] By adopting the above technical solution, the spindle box adopts a split type, which is easy to process and shape and convenient to install the support frame, making the entire installation process faster.

[0010] The lockhole that is formed on the two sides of the support frame is formed on the upper and lower sides of the support frame, and the lockhole that is formed on the two sides of the support frame is formed on the upper and lower sides of the support frame.

[0011] By adopting the above technical solution, the B split box is located between the two sliding force arms so that the thickness of the two are in the same vertical space, further reducing the overall volume of the vertical drill head. The drill sleeve is pressed against the workpiece by lifting the support frame, and the drill cutter is extended out of the drill sleeve through hole to be supported.

[0012] Preferably, both sliding force arms are provided with vertical sliding rails, and the A split box is provided with sliders on opposite sides of the first side groove, the sliding rail on one sliding force arm is slidingly connected to the slider on one side of the first side groove, and the sliding rail on the other sliding force arm is slidingly connected to the slider on the other side of the first side groove.

[0013] By adopting the above technical solution, the slide rail and the slider are used to slide and guide the support frame, so that the support frame is more stable and not easily misaligned.

[0014] Preferably, the drill sleeve has a plurality of balls evenly distributed on the inner wall of the through hole thereof.

[0015] By adopting the above technical solution, the drill bit is supported by the ball bearings abutting against the outer wall of the drill bit, and the drill bit is not easily polarized during the rotation process. At the same time, the friction is reduced by the ball bearings to assist the rotation, so that the drill bit rotates more smoothly.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The electric spindle is directly driven by a built-in electric motor. Compared with the mechanical transmission method, it is small in size and has higher rotation accuracy and stability, which is helpful to improve the processing quality and product precision. The electric spindle saves the installation space of the spindle box, which is convenient for the support frame structure to have a larger installation space. The servo motor is fixed to the spindle box and supported by the motor seat bracket. The method of replacing the servo motor and installing it on the support frame makes the support frame lighter. The screw rod and the support frame are installed by avoiding the installation groove. The screw rod is in the center of the spindle box. The support frame is supported by the screw rod and the weight is transferred to the motor seat bracket through the screw rod. The central axis of the motor seat bracket and the central axis of the screw rod are both in the center of the installation groove, so that the motor seat bracket evenly distributes the weight on the parts of the spindle box on both sides of the installation groove, so that the spindle box is evenly stressed, and the head is relatively stable as a whole, which is convenient for reducing the shaking of the machine tool during the activity of the support frame to affect the processing accuracy and efficiency, and achieve good stability while keeping the vertical drilling head small.

[0018] 2. The spindle box adopts split type, which is convenient for processing and forming and convenient for installing the support frame, making the whole installation process faster.

[0019] 3. By using a support frame with space avoidance to semi-hide the B split box inside the support frame, the overall volume of the vertical drilling rig head is further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a vertical drilling rig head that is easy to reduce in size and has high stability according to this embodiment.

[0021] Figure 2 It is a schematic diagram of the connection structure of the motor base, servo motor, screw rod and A split box in this embodiment.

[0022] Figure 3 It is a schematic diagram of the structure of the electric spindle and the B split box of this embodiment.

[0023] Figure 4 Schematic diagram of the structure of the support frame of this embodiment.

[0024] Figure numerals: 1. spindle box; 11. mounting groove; 12. motor seat bracket; 121. groove; 13. A split box; 131. first side groove; 132. bearing seat; 1321. second bearing; 133. slider; 14. B split box; 141. second side groove; 142. mounting sleeve; 2. support frame; 21. connecting seat; 211. convex part; 212. avoidance groove; 22. drill sleeve seat; 221. drill sleeve; 222. ball; 23. sliding force arm; 231. slide rail; 3. electric spindle; 4. motor seat; 41. first bearing; 5. servo motor; 6. screw rod; 7. threaded sleeve block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] Reference Figure 1 and Figure 2 , a vertical drilling head that is easy to reduce volume and has high stability, includes a spindle box 1 and a supporting frame 2, a mounting groove 11 is arranged at the center position of the top of the spindle box 1, an electric spindle 3 is fixed to the spindle box 1 on one side of the mounting groove 11, the electric spindle 3 is arranged upright, a motor seat bracket 12 is arranged on the top of the spindle box 1, the motor seat bracket 12 spans the mounting groove 11 and is located in the middle position of the mounting groove 11, the motor seat bracket 12 is arranged in an isosceles trapezoid, the upper end is small and the lower end is large, and the axis thereof is located at the center of the mounting groove 11, a motor seat 4 is fixed to the top of one side of the motor seat bracket 12, a servo motor 5 is fixed to the top of the motor seat 4, a screw rod 6 is fixed to the driving shaft of the servo motor 5, and the screw rod 6 is upright in the mounting groove 11, and the motor seat bracket 12 is concavely provided with grooves 121 running through both ends on the fixed side of the motor seat 4, the motor seat 4 and the screw rod 6 are avoided through the groove 121 so that the central axis of the screw rod 6 and the central axis of the motor seat bracket 12 are on the same vertical line, and the rod body of the screw rod 6 The screw rod 6 is driven by the servo motor 5 to rotate and drive the threaded sleeve 7 to reciprocate along the length direction of the screw rod 6 to drive the support frame 2 to lift and lower the workpiece to press and support the drill. The electric spindle 3 is small in size and saves the installation space of the spindle box 1, making the overall volume of the vertical drilling head small. The support frame 2 is supported by the screw rod 6, and the weight of the support frame 2 is transmitted to the motor seat bracket 12 through the screw rod 6. The central axis of the motor seat bracket 12 and the central axis of the screw rod 6 are both located at the center of the installation groove 11, so that the motor seat bracket 12 evenly distributes the weight on the parts of the spindle box 1 on both sides of the installation groove 11, so that the spindle box 1 is evenly stressed, and the head is relatively stable as a whole. The motor is raised by the motor seat bracket 12, which is convenient for using a longer screw rod 6 to make the travel distance of the support frame 2 longer.

[0027] Reference Figure 1 , Figure 2 and Figure 3Further, the spindle box 1 includes an A split box 13 and a B split box 14, one side of the A split box 13 is provided with a first side groove 131 penetrating the top thereof, and one side of the B split box 14 is provided with a second side groove 141 penetrating the top thereof, the A split box 13 and the B split box 14 are fixed by bolt connection, and the first side groove 131 and the second side groove 141 are combined to form an installation groove 11, the motor seat bracket 12 is provided at the top of the A split box 13, and the B split box 14 is provided at a side away from the A split box 13. A mounting sleeve 142 is provided, and the electric spindle 3 is fixed in the inner hole of the mounting sleeve 142. The spindle box 1 is of a split type. During installation, the motor seat 4 and the servo motor 5 are first installed on the motor seat bracket 12, and then the screw rod 6 is installed, and then the support frame 2 is installed. The installation operation is avoided by the first side groove 131, so that the installation equipment or human hands have more operating space, and the installation is more convenient and quick. The A split box 13 and the B split box 14 are formed separately, the processing difficulty is reduced, and the forming is more convenient.

[0028] Reference Figure 2 Furthermore, a first bearing 41 is provided inside the motor seat 4, a bearing seat 132 is fixed at the bottom of the first side groove 131 of the A split box 13, and a second bearing 1321 is provided on the bearing seat 132. The top end of the screw rod 6 penetrates into the first bearing 41 and is then connected and fixed to the driving shaft of the servo motor 5, and the bottom end of the screw rod 6 penetrates into the second bearing 1321. The bearing is used to assist the rotation of the screw rod 6 to improve the rotation stability of the screw rod 6.

[0029] Reference Figure 1 and Figure 4Further, the supporting frame 2 includes a connecting seat 21, a drill sleeve seat 22 and two sliding force arms 23, the two sliding force arms 23 are arranged symmetrically on the left and right, the connecting seat 21 is located between the two sliding force arms 23 and at one end of the two sliding force arms 23, and one side wall of the connecting seat 21 is connected to one sliding force arm 23, and the other side wall of the connecting seat 21 is connected to the other sliding force arm 23, the drill sleeve seat 22 is located between the two sliding force arms 23 and at one end of the two sliding force arms 23 away from the connecting seat 21 and is connected to one side wall of the drill sleeve seat 22 and a sliding force arm 23, and the other side wall of the drill sleeve seat 22 is connected to the other sliding force arm 23, a drill sleeve 221 with a through hole is penetrated in the middle of the drill sleeve seat 22, a convex portion 211 is provided on the outer side of the connecting seat 21, and an avoidance groove 212 is provided on the inner side of the connecting seat 21, and a screw The grooved sleeve block 7 is connected to the convex portion 211 of the connecting seat 21, the B split box 14 is located between the two sliding force arms 23, the avoidance groove 212 avoids the installation sleeve 142, the through hole of the drill sleeve 221 is arranged in upper and lower alignment with the tool handle interface of the electric spindle 3, and the drill sleeve 221 is evenly distributed with a plurality of balls 222 on the inner wall of its through hole, the B split box 14 is located between the two sliding force arms 23 so that the thickness of the two is in the same vertical space, further reducing the overall volume of the vertical drilling rig head, the drill cutter is inserted into the through hole of the drill sleeve 221, and the outer wall of the drill cutter is abutted by the ball 222 to support the drill cutter, the drill cutter is not easy to be polarized during the rotation process, the ball 222 assists the drill cutter to rotate, reduces the friction between the drill cutter and the drill sleeve 221, and makes the drill cutter rotate more smoothly, and the drill sleeve 221 is pressed against the workpiece by the lifting of the support frame 2 to press the workpiece tightly and position it, thereby improving the drilling accuracy.

[0030] Reference Figure 2 and Figure 4 Furthermore, vertical slide rails 231 are provided on both sliding force arms 23, and sliders 133 are provided on opposite sides of the first side groove 131 of the A split box 13. The slide rail 231 on one sliding force arm 23 is slidably connected to the slider 133 on one side of the first side groove 131, and the slide rail 231 on the other sliding force arm 23 is slidably connected to the slider 133 on the other side of the first side groove 131. The cooperation of the slide rail 231 and the slider 133 is used to slide and guide the support frame 2, so that the support frame 2 is more stable and not easy to be displaced.

[0031] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vertical drilling head that is easy to reduce in size and has high stability, characterized in that: It includes a spindle box and a supporting frame, a mounting groove is provided at the center position of the top of the spindle box, an electric spindle is fixed to the spindle box on one side of the mounting groove, a motor seat bracket is provided on the top of the spindle box, the motor seat bracket spans the mounting groove and is located in the middle position of the mounting groove and its axis is located at the center of the mounting groove, a motor seat is fixed to the motor seat bracket, a servo motor is fixed on the top of the motor seat, a screw rod is fixed to the driving shaft of the servo motor, the screw rod is erected in the mounting groove and its axis is on the same vertical line with the center axis of the motor seat bracket, a threaded sleeve is sleeved on the shaft of the screw rod, and the supporting frame is movably connected to the spindle box and fixedly connected to the threaded sleeve block.

2. A vertical drilling head that is easy to reduce in size and has high stability according to claim 1, characterized in that: The spindle box includes a split box A and a split box B. One side of the split box A is provided with a first side groove running through the top thereof, and one side of the split box B is provided with a second side groove running through the top thereof. The split box A and the split box B are fixed by bolt connection and the first side groove and the second side groove are combined to form an installation groove. The motor seat bracket is arranged at the top of the split box A, and the split box B is provided with a mounting sleeve on the side away from the split box A, and the electric spindle is fixed in the mounting sleeve.

3. The vertical drilling head with reduced volume and high stability according to claim 2, characterized in that: The support frame includes a connecting seat, a drill sleeve seat and two sliding force arms, and the two sliding force arms are symmetrically arranged on the left and right sides. The connecting seat is located between the two sliding force arms and is at one end of the two sliding force arms, and one side wall of the connecting seat is connected to the one sliding force arm. The other side wall of the connecting seat is connected to the other sliding force arm. The drill sleeve seat is located between the two sliding force arms and is at one end of the two sliding force arms away from the connecting seat and is connected to one side wall of the drill sleeve seat and the sliding force arm. The other side wall of the drill sleeve seat is connected to the other sliding force arm. A drill sleeve with a through hole is penetrated through the middle of the drill sleeve seat, a convex portion is provided on the outer side of the connecting seat, an avoidance groove is provided on the inner side of the connecting seat, the threaded sleeve block is connected to the convex portion of the connecting seat, the B split box is located between the two sliding force arms, the avoidance groove avoids the mounting sleeve, and the through hole of the drill sleeve is arranged in an upper and lower alignment with the tool handle interface of the electric spindle.

4. A vertical drilling head that is easy to reduce in size and has high stability according to claim 3, characterized in that: Both sliding force arms are provided with vertical sliding rails, and the A split box is provided with sliders on opposite sides of the first side groove. The sliding rail on one sliding force arm is slidably connected to the slider on one side of the first side groove, and the sliding rail on the other sliding force arm is slidably connected to the slider on the other side of the first side groove.

5. The vertical drilling head with reduced volume and high stability according to claim 3, characterized in that: The drill sleeve is evenly provided with a plurality of balls on the inner wall of the through hole.

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