Vertical milling machine with protection function

Abstract

The invention belongs to the technical field of intelligent machine tool machining, and particularly relates to a vertical milling machine with a protection function. Comprising a machine shell, the machine shell is fixedly connected with a mounting shell, a positioning sleeve is arranged in the mounting shell, the positioning sleeve is rotationally connected with a connecting ring, the connecting ring is fixedly connected with a supporting shell, the supporting shell is in spline connection with a spline rod, the spline rod is fixedly connected with a lantern ring, the lantern ring is rotationally connected with a fixing shell, and the fixing shell is provided with a milling cutter. A mounting mechanism for fixing the milling cutter is arranged in the fixed shell, and a driving mechanism for driving the milling cutter to rotate is arranged in the mounting shell. Through relative movement of the spline rod and the supporting shell, a moving space is provided for the milling cutter, when the milling cutter collides with the cutter, the milling cutter can move along with a workpiece, the instant impact force borne by the milling cutter is reduced, the milling cutter and the first transmission rod are protected, and the probability that the milling cutter and the first transmission rod are damaged is reduced.

Description

Technical Field

[0001] This invention relates to the field of intelligent machine tool processing technology, and in particular to a vertical milling machine with protective functions. Background Technology

[0002] Vertical milling machines, as indispensable key equipment in the field of machining, use a spindle to drive the cutting tool at high speed, coordinating with the workpiece's multi-directional feed motion to perform various machining operations such as milling, drilling, and boring. During the actual operation of a vertical milling machine, due to various reasons such as CNC program errors, operational mistakes, and insecure workpiece clamping, a violent collision, known as "tool impact," can easily occur between the cutting tool and the workpiece machining area. This impact generates enormous impact force and stress waves. This huge impact force first concentrates on the relatively fragile cutting edge and tool holder, easily causing the tool to chip or break. It can also damage the tapered surface of the tool holder, the pull stud, and even the tool holder body, and then seriously threaten the spindle's accuracy and lifespan.

[0003] Research has revealed that most vertical milling machine spindle drive systems currently possess conventional overload protection functions, capable of triggering alarms, reducing speed, or stopping the machine when the load exceeds a set threshold. This reduces the probability of motor overheating or damage to transmission components due to overload. However, the instantaneous extreme impact force generated by tool collision often far exceeds the response and load-bearing range of conventional overload protection systems in terms of its rate of rise and peak value. Therefore, existing systems struggle to effectively mitigate the instantaneous destructive impact of tool collision, leaving the tool, tool holder, and even the spindle itself facing a high risk of damage. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a vertical milling machine with protective function.

[0005] The technical solution of the present invention: A vertical milling machine with protective function includes a housing, a mounting shell fixedly connected to the housing, a positioning sleeve disposed inside the mounting shell, a connecting ring rotatably connected to the positioning sleeve, a support shell fixedly connected to the connecting ring, a splined rod splinedly connected to the support shell, a collar fixedly connected to the splined rod, a fixed shell rotatably connected to the collar, a milling cutter disposed in the fixed shell, a mounting mechanism for fixing the milling cutter disposed inside the fixed shell, and a driving mechanism for rotating the milling cutter disposed inside the mounting shell.

[0006] In one preferred embodiment, the mounting mechanism includes a first transmission rod slidably connected to the fixed housing, with a first elastic element disposed between them. The first transmission rod is drively connected to the milling cutter. The first transmission rod contains circumferentially distributed limiting balls, all of which are used to jointly fix the milling cutter. An oil supply pump is installed inside the mounting housing, and a first pipeline connects the oil supply pump to the fixed housing. All the limiting balls are in contact with the fixed housing.

[0007] In one preferred embodiment, the driving mechanism includes a driving module mounted on the mounting housing. A positioning tube is rotatably connected inside the mounting housing. The driving module is used to drive the positioning tube to rotate. A second transmission rod is splined inside the positioning tube, and a second elastic element is provided between the two. The second transmission rod is drivingly connected to the first transmission rod.

[0008] In one preferred embodiment, a buffer shell is fixedly connected to the side of the connecting ring near the support shell. The buffer shell is filled with liquid and is connected to a second pipeline and a third pipeline. The third pipeline is connected to the oil supply pump. A piston rod is slidably connected inside the buffer shell and is fixedly connected to the collar. An oil storage tank is installed inside the mounting shell. The second pipeline is connected to the oil storage tank and is equipped with a one-way pressure relief valve.

[0009] In one preferred embodiment, the central axis of the piston rod is aligned with the central axis of the spline rod.

[0010] In one preferred embodiment, a drive motor and a transmission gear set are installed inside the mounting housing, and the output shaft of the drive motor is connected to the connecting ring via the transmission gear set.

[0011] In one preferred embodiment, a limiting rod is slidably connected inside the mounting housing, and a third elastic element is provided between the two, the limiting rod being used to limit the second transmission rod.

[0012] In one preferred embodiment, a drive telescopic component is further included. The drive telescopic component is installed inside the mounting housing, and a connecting member is fixedly connected to the telescopic end of the drive telescopic component. The connecting member is used to drive the second transmission rod to move.

[0013] In one preferred embodiment, the connector is fixedly connected to an unlocking rod, which is used to press the limiting rod.

[0014] In one preferred embodiment, a fourth pipeline is also included, which is connected to the oil supply pump. The mounting housing is slidably connected to the positioning sleeve, and an oil storage chamber filled with liquid is provided between the two. The oil storage chamber is connected to the fourth pipeline.

[0015] In combination with the above technical solutions, the beneficial effects achieved by the present invention are as follows: The present invention provides moving space for the milling cutter by the relative movement of the spline rod and the support shell, so that when the milling cutter collides with the workpiece, it can move together with the workpiece, reducing the instantaneous impact force on the milling cutter, protecting the milling cutter and the first transmission rod, and reducing the probability of damage to the milling cutter and the first transmission rod.

[0016] This invention uses liquid inside the buffer shell to buffer the piston rod, reducing the speed of the piston rod's movement. This allows the milling cutter to move slowly and stably after being subjected to an instantaneous impact force, reducing the probability of the milling cutter being damaged secondary.

[0017] This invention drives the telescopic end of the telescopic component to move the connecting component upward, thereby disconnecting the first transmission rod from the second transmission rod. This ensures that the rotational speed of the milling cutter is reduced after it is subjected to an instantaneous impact force, while also ensuring that the milling cutter moves smoothly along with the workpiece.

[0018] This invention moves the positioning sleeve upwards, causing the transmission milling cutter to move upwards synchronously. This causes the milling cutter to lose contact with the workpiece after being subjected to an instantaneous impact force, further reducing the damage to the milling cutter caused by the workpiece. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the mounting shell of the present invention;

[0021] Figure 3 This is a three-dimensional structural cross-sectional view of the mounting shell of the present invention;

[0022] Figure 4 This is a three-dimensional structural diagram of the positioning sleeve and connecting ring of the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the support shell and spline rod of the present invention;

[0024] Figure 6 This is a three-dimensional structural diagram of the collar and fixing shell of the present invention;

[0025] Figure 7 This is a three-dimensional structural diagram of the milling cutter and the first transmission rod of the present invention;

[0026] Figure 8 This is a three-dimensional structural diagram of the first transmission rod and the limiting ball of the present invention;

[0027] Figure 9 This is a three-dimensional structural diagram of the drive telescopic component and connecting component of the present invention;

[0028] Figure 10This is a three-dimensional structural cross-sectional view of the limiting rod and unlocking rod of the present invention.

[0029] In the attached drawings, the following labels are used: 1-machine housing, 2-mounting housing, 3-positioning sleeve, 4-connecting ring, 5-support housing, 6-spline rod, 7-collar ring, 8-fixed housing, 9-milling cutter, 10-first transmission rod, 11-limiting ball, 12-oil supply pump, 121-first pipeline, 13-drive module, 14-positioning tube, 15-second transmission rod, 201-buffer housing, 2011-second pipeline, 2012-third pipeline, 202-piston rod, 203-oil reservoir, 301-drive motor, 302-transmission gear set, 401-limiting rod, 501-drive telescopic component, 502-connecting component, 601-unlocking rod, 701-fourth pipeline, 702-oil reservoir. Detailed Implementation

[0030] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0031] Most vertical milling machines are equipped with spindle drive systems that have overload protection functions. However, these functions mainly target the smooth transmission of cutting loads and conventional overload protection, such as reducing feed rate, stopping feed, or cutting off spindle power when the load exceeds a set threshold to prevent system damage. However, these protection mechanisms are usually unable to effectively mitigate the instantaneous high-intensity impact caused by tool collision. Therefore, tool collision can still lead to serious consequences such as tool damage, decreased spindle accuracy, bearing damage, or even spindle structural failure.

[0032] Example 1

[0033] A vertical milling machine with protective functions, reference Figures 1 to 8 The device includes a housing 1, with a control module on the front side of the housing 1. This control module is used to control the opening and closing of all the electrical components described below. A mounting shell 2 is fixedly connected to the upper part of the housing 1. A positioning sleeve 3 is provided inside the mounting shell 2. In this embodiment, the mounting shell 2 and the positioning sleeve 3 are fixedly connected. A connecting ring 4 is rotatably connected to the lower side of the positioning sleeve 3. A support shell 5 is fixedly connected to the lower side of the connecting ring 4. A spline rod 6 is splinedly connected to the support shell 5. A collar 7 is fixedly connected to the right side of the spline rod 6. A fixed shell 8 is rotatably connected to the collar 7. An annular inclined surface is provided inside the fixed shell 8 to facilitate the insertion of the milling cutter 9. The fixed shell 8 is equipped with the milling cutter 9. The central axis of the spline rod 6 corresponds to the cutting direction (workpiece movement direction) of the milling cutter 9. A mounting mechanism for fixing the milling cutter 9 is provided inside the fixed shell 8. A drive mechanism for rotating the milling cutter 9 is provided inside the mounting shell 2.

[0034] refer to Figures 3 to 8The mounting mechanism includes a first transmission rod 10, the upper side of which has circumferentially distributed teeth. The first transmission rod 10 is slidably connected to the fixed housing 8, and a first elastic element, which is a spring, is provided between them. The first transmission rod 10 is connected to the milling cutter 9. Circumferentially distributed limiting balls 11 are provided inside the first transmission rod 10. A frustum cavity is provided in the middle of the fixed housing 8, the diameter of which is larger than the outer diameter of the first transmission rod 10. When all the limiting balls 11 are aligned with the frustum cavity, the milling cutter 9 can move along... The fixed housing 8 slides into the interior of the first transmission rod 10, which can drive the milling cutter 9 to rotate synchronously (the driving structure here is common knowledge and will not be described in detail in the figure and text). All the limit balls 11 are used to fix the milling cutter 9 together. All the limit balls 11 are in contact with the fixed housing 8. An oil supply pump 12 is installed in the mounting housing 2. The oil supply pump 12 is existing equipment. A first pipeline 121 connects the oil supply pump 12 and the fixed housing 8. The oil supply pump 12 injects oil into the fixed housing 8 through the first pipeline 121.

[0035] refer to Figures 3 to 9 The drive mechanism includes a drive module 13, which is mounted on the mounting housing 2. The drive module 13 consists of a servo motor, two pulleys, a belt, and a gear set. The servo motor is fixedly connected to the mounting housing 2. One pulley is fixedly connected to the output shaft of the servo motor. The other pulley is rotatably connected to one of the gears in the mounting housing 2. The other gear is fixedly connected to the positioning tube 14. The positioning tube 14 is rotatably connected in the mounting housing 2. A rotating bearing is provided between the positioning tube 14 and the mounting housing 2. The drive module 13 is used to drive the positioning tube 14 to rotate. A second transmission rod 15 is splined in the positioning tube 14, and a second elastic element is provided between the two. The second elastic element is a spring and is always in a compressed state, thereby providing a downward pressing force for the second transmission rod 15. The lower side of the second transmission rod 15 has circumferentially distributed teeth, and the teeth of the second transmission rod 15 are connected to the teeth of the gear set.

[0036] refer to Figures 3 to 6 A buffer shell 201 is fixedly connected to the lower side of the connecting ring 4. The buffer shell 201 and the splined rod 6 are located on the left and right sides of the collar 7, respectively. During operation, the position of the splined rod 6 corresponds to the direction of workpiece movement. Figure 1For example, when the workpiece moves to the left, the spline rod 6 is located to the left of the collar 7. Initially, the buffer shell 201 is filled with liquid. The buffer shell 201 is connected to the second pipe 2011 and the third pipe 2012. The third pipe 2012 is connected to the oil supply pump 12. The oil supply pump 12 injects liquid into the buffer shell 201 through the third pipe 2012. The piston rod 202 is slidably connected inside the buffer shell 201. The liquid inside the buffer shell 201 surrounds the piston rod 202. The piston rod 202 is fixedly connected to the collar 7. A vent hole is provided on the right side of the buffer shell 201 to facilitate the smooth sliding of the piston rod 202. The installation shell 2 is installed inside the buffer shell 2. There is an oil reservoir 203, and a second pipeline 2011 is connected to the oil reservoir 203. A one-way pressure relief valve is connected to the second pipeline 2011. When the pressure of the liquid in the buffer shell 201 is less than the threshold of the one-way pressure relief valve, the liquid in the buffer shell 201 ensures the stability of the piston rod 202, so that the fixed shell 8 and its parts are stable, thereby allowing the milling cutter 9 to perform normal cutting on the workpiece. At the same time, the one-way pressure relief valve can only allow the buffer shell 201 to discharge the liquid in it into the oil reservoir 203 through the second pipeline 2011. The oil reservoir 203 is connected to the oil supply pump 12. The central axis of the piston rod 202 is aligned with the central axis of the spline rod 6.

[0037] refer to Figures 3 to 5 The mounting housing 2 houses a drive motor 301 and a transmission gear set 302. The drive motor 301 is an existing servo motor. The transmission gear set 302 consists of meshing spur gears and spur ring gears, with the thickness of the spur gears being greater than the thickness of the spur ring gears to ensure that the two are always in a meshing state. The gears are fixedly connected to the output shaft of the drive motor 301, and the spur ring gears are fixedly connected to the connecting ring 4. The output shaft of the drive motor 301 is connected to the connecting ring 4 through the transmission gear set 302.

[0038] refer to Figure 4 , Figure 5 , Figure 9 and Figure 10 The mounting housing 2 has three circumferentially distributed limiting rods 401 slidably connected inside, and a third elastic element, which is a spring, is provided between them to make the limiting rods 401 contact the second transmission rod 15. The upper side of the limiting rod 401 has an inclined surface, and its lower side is a flat surface. The upper part of the second transmission rod 15 is provided with an annular groove. Initially, the limiting rod 401 is inserted into the annular groove of the second transmission rod 15 to limit the second transmission rod 15, so that the second transmission rod 15 cannot move upward, thereby ensuring that the first transmission rod 10 and the second transmission rod 15 are connected during the normal processing of the workpiece.

[0039] refer to Figure 3 , Figure 4 , Figure 9 and Figure 10It also includes a drive telescopic component 501, which is an existing electric push rod. The drive telescopic component 501 is installed in the mounting housing 2. The telescopic end of the drive telescopic component 501 is fixedly connected to a connector 502. The connector 502 consists of a circular plate, a circular ring, and four circular rods, with the circular rods located between the circular plate and the circular ring. The upper part of the second transmission rod 15 has a circular plate, and the circular plate of the second transmission rod 15 is located between the circular plate and the circular ring on the connector 502. There is a gap between the circular plate and the circular ring on the connector 502 and the circular plate of the second transmission rod 15. The circular ring and the circular plate of the connector 502 are used to drive the circular plate on the second transmission rod 15 to move. In this paper, the connection between the second transmission rod 15 and the first transmission rod 10 relies on the elastic force of the second elastic element and the limiting rod 401 to limit the second transmission rod 15. This achieves the purpose of not directly connecting the telescopic end of the drive telescopic component 501 to the second transmission rod 15, thereby reducing the damage to the drive telescopic component 501 during the operation of the second transmission rod 15.

[0040] refer to Figure 9 and Figure 10 Three unlocking rods 601 are fixedly connected to the lower side of the connector 502 in a circumferentially distributed manner. The unlocking rods 601 correspond one-to-one with the limiting rods 401. The middle part of the unlocking rod 601 is provided with a groove with two inclined surfaces, and the unlocking rod 601 is used to press the limiting rod 401, so that the limiting rod 401 loses contact with the second transmission rod 15.

[0041] The working principle of this embodiment:

[0042] When using this device for cutting operations, first insert the milling cutter 9 into the fixed housing 8, and start the oil supply pump 12 from the control terminal. The oil supply pump 12 injects liquid into the fixed housing 8 through the first pipeline 121. As the amount of liquid in the fixed housing 8 increases, the liquid pushes the first transmission rod 10 to move downward. The first transmission rod 10 compresses the first elastic element, and the first transmission rod 10 drives all the limit balls 11 to move downward until the limit balls 11 are aligned with the frustum cavity in the middle of the fixed housing 8. Then, the oil supply pump 12 is turned off, and the first transmission rod 10 is disconnected from the second transmission rod 15.

[0043] After the limiting ball 11 moves into the frustum cavity of the fixed shell 8, the operator pushes the milling cutter 9 upward. The milling cutter 9 enters the first transmission rod 10. When the milling cutter 9 contacts the limiting ball 11, the milling cutter 9 squeezes the limiting ball 11, causing all the limiting balls 11 to move away from each other and enter the frustum cavity of the fixed shell 8. After the milling cutter 9 passes the limiting ball 11, the oil supply pump 12 is started again. The oil supply pump 12 extracts the liquid in the fixed shell 8 through the first pipeline 121. The first transmission rod 10 begins to move upward under the action of the first elastic element. The first transmission rod 10 drives all the limiting balls 11 to move. Under the guidance of the fixed shell 8, the limiting balls 11 gradually approach and limit the milling cutter 9 until the limiting ball 11 moves out of the frustum cavity of the fixed shell 8. At this time, the first transmission rod 10 and the milling cutter 9 are connected, and the first transmission rod 10 and the second transmission rod 15 are connected again.

[0044] After the milling cutter 9 is fixed, the control terminal activates the drive module 13. The drive module 13 drives the positioning tube 14 to rotate, the positioning tube 14 drives the second transmission rod 15 to rotate synchronously, the second transmission rod 15 drives the first transmission rod 10 to rotate, and the first transmission rod 10 drives the milling cutter 9 to rotate. Then, the workpiece is cut. During this process, under the action of the one-way pressure relief valve on the second pipeline 2011, the piston rod 201 is kept stable by the liquid in the buffer shell 201, so that the milling cutter 9 can smoothly process the workpiece.

[0045] During the workpiece processing, taking the workpiece moving to the left as an example, the control terminal controls the drive motor 301. The output shaft of the drive motor 301 drives the connecting ring 4 to rotate through the transmission gear set 302. The connecting ring 4 drives the spline rod 6 to rotate through the support shell 5, and at the same time drives the piston rod 202 to rotate through the buffer shell 201. The spline rod 6 and the piston rod 202 together drive the collar 7 to rotate, so that the spline rod 6 is located on the left side of the collar 7, that is, the position of the piston rod 202 relative to the collar 7 is always on the other side of the workpiece movement direction.

[0046] If a collision occurs during workpiece machining, the milling cutter 9 will become stuck. The workpiece will continue to move to the left and compress the milling cutter 9. The milling cutter 9 will be subjected to a compressive force higher than that during normal operation. The milling cutter 9 transmits the pressure to the piston rod 202 through the first transmission rod 10, the fixed shell 8, and the collar 7, causing the milling cutter 9 to tend to move to the left. The compressive force of the piston rod 202 on the liquid in the buffer shell 201 increases. As the compressive force of the workpiece on the milling cutter 9 gradually increases, the pressure of the liquid in the buffer shell 201 increases synchronously. When the pressure of the liquid in the buffer shell 201 is greater than the threshold of the one-way pressure relief valve on the first pipeline 121, the one-way pressure relief valve opens. At this time, the control terminal opens the drive telescopic component 501, driving the telescopic end of the telescopic component 501 to move upward.

[0047] During the upward movement of the telescopic end of the drive telescopic component 501, the telescopic end of the drive telescopic component 501 drives the connecting component 502 to move upward. The connecting component 502 drives the unlocking rod 601 on it to move upward. The unlocking rod 601 presses against the adjacent limiting rod 401. All the limiting rods 401 move away from each other and compress the adjacent third elastic element, so that the limiting rod 401 loses contact with the second transmission rod 15, thereby releasing the limitation on the second transmission rod 15. After that, the connecting component 502 continues to move upward until the ring of the connecting component 502 contacts the circular plate of the second transmission rod 15. The connecting component 502 drives the second transmission rod 15 to move upward. The second transmission rod 15 further compresses the second elastic element. At this time, the second transmission rod 15 is disconnected from the first transmission rod 10, and the control terminal closes the drive telescopic component 501.

[0048] After the one-way pressure relief valve on the first pipeline 121 is opened, the workpiece continues to squeeze the milling cutter 9 and drives the milling cutter 9 to move to the left. The piston rod 202 of the milling cutter 9 moves and squeezes the liquid in the buffer shell 201. Under the resistance of the liquid, the piston rod 202 moves slowly. At the same time, the spline rod 6 of the milling cutter 9 moves slowly to the left. The spline rod 6 slides relative to the support shell 5. By moving synchronously with the workpiece after the milling cutter 9 impacts the milling cutter 9, the impact force of the workpiece on the milling cutter 9 is reduced, and the probability of the milling cutter 9 breaking and the probability of the workpiece being damaged are reduced.

[0049] During the movement of the workpiece driving the milling cutter 9, after the operator discovers the collision, the movement of the workpiece is stopped, the one-way pressure relief valve on the second pipeline 2011 is closed, that is, the workpiece no longer continues to mill the cutter 9, the operator simultaneously shuts off the drive module 13, and then the control terminal controls the oil supply pump 12, the oil supply pump 12 injects liquid into the buffer shell 201 through the third pipeline 2012, the liquid in the buffer shell 201 increases and squeezes the piston rod 202 to move in the opposite direction, the piston rod 202 drives the fixed shell and the milling cutter 9 to reset; then, the control terminal controls the drive telescopic component 501 to move the connecting component 502 downward to reset, during this process, the second transmission rod 15 moves downward under the action of the second elastic component and connects with the first transmission rod 10, at the same time the connecting component 502 drives the unlocking rod 601 to reset, so that all the limiting rods 401 approach each other under the action of the third elastic component and extend into the annular groove of the second transmission rod 15, thereby limiting the second transmission rod 15 again.

[0050] If the milling cutter 9 needs to be replaced or removed, repeat the above operation of the oil supply pump 12 injecting liquid into the fixed housing 8 to make all the limit balls 11 lose their limit on the milling cutter 9, so that the milling cutter 9 can be pulled out of the fixed housing 8.

[0051] Example 2

[0052] Based on Example 1, and referring to Figure 3 and Figure 4It also includes a fourth pipeline 701, which is connected to the oil supply pump 12. The mounting housing 2 and the positioning sleeve 3 are connected in a sealed sliding connection, and a liquid-filled oil storage chamber 702 is provided between them. The oil storage chamber 702 is connected to the fourth pipeline 701. The oil supply pump 12 can extract the liquid in the oil storage chamber 702 through the fourth pipeline 701. When the workpiece moves together with the milling cutter 9, the control terminal starts the oil supply pump 12. The oil supply pump 12 extracts the liquid in the oil storage chamber 702 through the fourth pipeline 701. The liquid in the oil storage chamber 702 decreases and the pressure drops. Under the action of negative pressure, the positioning sleeve 3 moves upward. The positioning sleeve 3 drives the connecting ring 4 to move. The connecting ring 4 is connected to the support housing 5. The spline rod 6, buffer housing 201, and piston rod 202 drive the collar 7 to move upward. The collar 7 drives the fixed housing 8 to move upward. The fixed housing 8 drives the milling cutter 9 to move upward through the first transmission rod 10 and all the limit balls 11, thus causing the milling cutter 9 to lose contact with the workpiece. During this process, the first transmission rod 10 is always located below the second transmission rod 15. After the workpiece stops moving, the control terminal controls the oil supply pump 12. The oil supply pump 12 injects liquid into the oil storage chamber 702 through the fourth pipeline 701, causing the positioning sleeve 3 to move downward and reset. In this way, after the milling cutter 9 collidees with the workpiece, the control terminal controls the milling cutter 9 to move upward, so that it loses contact with the workpiece, further reducing the damage of the workpiece to the milling cutter 9.

[0053] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended technical solutions.

Claims

1. A vertical milling machine with protective function, characterized in that, The device includes a housing (1), a mounting shell (2) fixedly connected to the housing (1), a positioning sleeve (3) provided inside the mounting shell (2), a connecting ring (4) rotatably connected to the positioning sleeve (3), a support shell (5) fixedly connected to the connecting ring (4), a spline rod (6) splinedly connected to the support shell (5), a collar (7) fixedly connected to the spline rod (6), a fixed shell (8) rotatably connected to the collar (7), a milling cutter (9) provided in the fixed shell (8), a mounting mechanism for fixing the milling cutter (9) provided inside the fixed shell (8), and a driving mechanism for driving the milling cutter (9) to rotate provided inside the mounting shell (2).

2. A vertical milling machine with protective function according to claim 1, characterized in that, The mounting mechanism includes a first transmission rod (10), which is slidably connected to the fixed housing (8) and a first elastic element is provided between them. The first transmission rod (10) is connected to the milling cutter (9) in a transmission manner. The first transmission rod (10) is provided with circumferentially distributed limiting balls (11). All the limiting balls (11) are used to fix the milling cutter (9) together. An oil supply pump (12) is installed in the mounting housing (2). A first pipeline (121) is connected between the oil supply pump (12) and the fixed housing (8). All the limiting balls (11) are in contact with the fixed housing (8).

3. A vertical milling machine with protective function according to claim 2, characterized in that, The driving mechanism includes a driving module (13), which is installed in the mounting shell (2). A positioning tube (14) is rotatably connected inside the mounting shell (2). The driving module (13) is used to drive the positioning tube (14) to rotate. A second transmission rod (15) is splined inside the positioning tube (14), and a second elastic element is provided between the two. The second transmission rod (15) is connected to the first transmission rod (10) in a transmission connection.

4. A vertical milling machine with protective function according to claim 2, characterized in that, A buffer shell (201) is fixedly connected to the side of the connecting ring (4) near the support shell (5). The buffer shell (201) is filled with liquid. The buffer shell (201) is connected to a second pipeline (2011) and a third pipeline (2012). The third pipeline (2012) is connected to the oil supply pump (12). A piston rod (202) is slidably connected inside the buffer shell (201). The piston rod (202) is fixedly connected to the collar (7). An oil storage tank (203) is installed inside the mounting shell (2). The second pipeline (2011) is connected to the oil storage tank (203). A one-way pressure relief valve is installed on the second pipeline (2011).

5. A vertical milling machine with protective function according to claim 4, characterized in that, The central axis of the piston rod (202) is aligned with the central axis of the spline rod (6).

6. A vertical milling machine with protective function according to claim 1, characterized in that, The mounting housing (2) houses a drive motor (301) and a transmission gear set (302). The output shaft of the drive motor (301) is connected to the connecting ring (4) via the transmission gear set (302).

7. A vertical milling machine with protective function according to claim 3, characterized in that, The mounting housing (2) is slidably connected to a limiting rod (401), and a third elastic element is provided between the two. The limiting rod (401) is used to limit the second transmission rod (15).

8. A vertical milling machine with protective function according to claim 7, characterized in that, It also includes a drive telescopic component (501), which is installed inside the mounting shell (2). The telescopic end of the drive telescopic component (501) is fixedly connected to a connector (502), which is used to drive the second transmission rod (15) to move.

9. A vertical milling machine with protective function according to claim 8, characterized in that, The connector (502) is fixedly connected to an unlocking rod (601), which is used to press the limiting rod (401).

10. A vertical milling machine with protective function according to claim 2, characterized in that, It also includes a fourth pipeline (701), which is connected to the oil supply pump (12). The mounting shell (2) is slidably connected to the positioning sleeve (3), and an oil storage chamber (702) filled with liquid is provided between the two. The oil storage chamber (702) is connected to the fourth pipeline (701).

Images