Rotary table sealing device driven by motor and machine tool with sealing device

Abstract

The invention discloses a motor-driven rotary table sealing device and a machine tool. The rotary table sealing device comprises a rotary table connecting piece provided with a first protrusion, a second protrusion and an air outlet hole. The rotary table is provided with a fifth protrusion and a sixth protrusion and connected with the motor, a first channel is formed by the side, close to the axis direction, of the fifth protrusion and the side, away from the axis, of the first protrusion, and a second channel is formed by the position between the fifth protrusion and the sixth protrusion and the first protrusion. The side, close to the axis, of the first protrusion and the side, away from the axis, of the sixth protrusion form a third channel, and the width of the first channel and the width of the third channel are smaller than that of the second channel; and the sealing connecting piece is connected with the rotary table connecting piece, is provided with an air cavity and an exhaust channel which are communicated with the air outlet hole, and is arranged between the first bulge and the second bulge. Compared with the prior art, the invention has the advantages of effectively preventing the bearing in the motor from being damaged and preventing the coil of the motor from being burnt to cause heavy economic loss, and reducing the maintenance of the rotary table.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tools, and in particular to a motor-driven turntable sealing device and a machine tool with the sealing device. Background Art

[0002] The five-axis CNC machining center is a CNC machine tool that performs subtractive processing on large pieces of material. During the machining process, the tool cuts the large piece of material into sharp debris and powder particles. These debris and particles can easily cut or wear the sealing lip of the plastic sealing ring, causing the cutting fluid to enter the interior of the five-axis turntable through the gap, which may cause damage to the bearings inside the motor under the turntable and burn the motor coils, resulting in significant economic losses. The five-axis turntable is a component assembled to the five-axis machine tool. If water enters the turntable and the turntable needs to be repaired, it is very inconvenient to replace the seals, bearings, and coils. The entire turntable needs to be lifted and disassembled with a crane at the customer's site before the seals, bearings, and coils can be replaced. After replacement, the turntable needs to be reinstalled and the entire machine needs to be recalibrated for accuracy, which has the disadvantage of a huge workload. Summary of the Invention

[0003] The object of the present invention is to provide a motor-driven turntable sealing device, which is used to solve the above-mentioned technical problems.

[0004] The present invention discloses a motor-driven turntable sealing device, comprising: a turntable connecting member, which is fixed above the motor and is provided with a first protrusion and a second protrusion in a radial direction, an air outlet hole connected to an air supply pipe is provided between the first protrusion and the second protrusion; a turntable, which is provided above the turntable connecting member and is connected to the motor and driven to rotate by the motor, and the turntable is sequentially provided with a fifth protrusion and a sixth protrusion in a radial direction, a side of the fifth protrusion close to the axis direction cooperates with a side of the first protrusion away from the axis direction to form a first channel, and a gap is formed between the fifth protrusion and the sixth protrusion and the first protrusion. Cooperate to form a second channel, the side of the first protrusion close to the axis direction and the side of the sixth protrusion away from the axis direction cooperate to form a third channel, the first channel, the second channel and the third channel are connected to each other in sequence, and the widths of the first channel and the third channel are both smaller than the width of the second channel; a sealing connector, which is connected to the turntable connector and is arranged between the first protrusion and the second protrusion of the turntable connector, the sealing connector is provided with an air cavity with an air uniforming function connected to the air outlet and an exhaust channel, one end of the exhaust channel is connected to the air cavity, and the other end is connected to the third channel.

[0005] In some preferred embodiments, a sealing member is provided between the turntable connecting member and the sealing connecting member.

[0006] In some preferred embodiments, the turntable is provided with a plurality of sawtooth-shaped first grooves in the second channel.

[0007] In some preferred embodiments, the side of the sixth protrusion close to the axis cooperates with the sealing connector to form a fourth channel, the turntable is provided with a plurality of second grooves, and correspondingly the turntable connector is provided with a plurality of third protrusions extending into the second grooves to form a sixth channel, and a fifth channel is provided between the fourth channel and the sixth channel to connect the fourth channel with the sixth channel.

[0008] In some preferred embodiments, the sealing connection member is provided with a third groove.

[0009] In some preferred embodiments, a slope is provided on a side of the first protrusion away from the second protrusion.

[0010] In some preferred embodiments, the first channel, the third channel and the fourth channel are all arranged longitudinally.

[0011] In some preferred embodiments, the second channel and the fifth channel are both arranged horizontally.

[0012] The present invention also provides a machine tool having the above-mentioned motor-driven turntable sealing device.

[0013] In some preferred embodiments, the machine tool also includes a cradle and two swing arms, the two swing arms are respectively fixed on both sides of the cradle, the motor is installed in the cradle, the turntable connecting piece is provided with a first screw hole and a third screw, the first screw is inserted into the first screw hole and then threadedly connected to the cradle, the two swing arms are provided with a second screw hole and a fourth screw, the second screw is inserted into the second screw hole and then threadedly connected to the cradle, a plug is provided at the upper end of the second screw hole to seal the second screw hole, and a sealing ring is provided between the turntable connecting piece and the two swing arms.

[0014] Compared with the prior art, the present invention is a motor-driven turntable sealing device in which the gas released from the air outlet enters the air cavity with a uniform air flow effect and then overflows through the third channel, the second channel and the first channel. Since the width of the first channel and the width of the third channel are both smaller than the width of the second channel, the gas flow rate will accelerate when passing through the third channel and the first channel, and an air curtain will be formed at the edge of the turntable to effectively prevent sharp debris and powder particles from entering the interior of the turntable. It has the advantage of eliminating the need for plastic seals and can also effectively prevent cutting fluid from entering the motor, preventing damage to the bearings inside the motor and burning of the motor coils to cause significant economic losses, and reducing turntable maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A partial cross-sectional view of a motor-driven turntable sealing device of the present invention; Figure 2 for Figure 1 A partial enlarged view of point A in the middle; Figure 3 is a three-dimensional diagram of the turntable connector; Figure 4 is a three-dimensional diagram of the turntable connector; Figure 5 It is a three-dimensional view of the turntable connecting piece from another direction; Figure 6 A perspective view of a machine tool according to the present invention; Figure 7 for Figure 6 A partial sectional front view of Figure 8 for Figure 7 A partial enlarged view of point B in the middle; Figure 9 for Figure 6 Exploded diagram of .

[0016] The implementation and advantages of the functions of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] To further illustrate the technical means and effects employed by this application to achieve its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of this application is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0018] like Figures 1 to 5 , combined with Figure 9As shown, a motor-driven turntable sealing device of the present invention includes: a turntable connector 1, which is fixed above the motor 2 and is provided with a first protrusion 11 and a second protrusion 12 in the radial direction, and an air outlet 13 connected to the air supply pipe is provided between the first protrusion 11 and the second protrusion 12; a turntable 3, which is provided above the turntable connector 1 and is connected to the rotating shaft of the motor 2 and is driven to rotate by the motor 2, and the turntable 3 is connected to the rotating shaft of the motor 2 by a first screw. The turntable 3 is provided with a fifth protrusion 31 and a sixth protrusion 32 in the radial direction in sequence, and the side of the fifth protrusion 31 close to the axis direction (the axis refers to the center of the rotating shaft of the motor 2) cooperates with the side of the first protrusion 11 away from the axis center to form a first channel 101, and the fifth protrusion 31 and the sixth protrusion 32 cooperate with the first protrusion 11 to form a second channel 102, and the side of the first protrusion 11 close to the axis direction and the side of the sixth protrusion 32 away from the axis center cooperate to form a third channel 103. The first channel 101, the second channel 102 and the third channel 103 are connected to each other in sequence, and the width W1 of the first channel 101 and the width W3 of the third channel 103 are both smaller than the width W2 of the second channel; the sealing connector 4 is connected to the turntable connector 1 by a second screw, and is arranged between the first protrusion 11 and the second protrusion 12 of the turntable connector 1, and the sealing connector 4 is provided with a uniform air flow connected to the air outlet 13 The air cavity 41 with uniform air flow is provided with an exhaust channel 42, one end of the exhaust channel 42 is connected to the air cavity 41, and the other end is connected to the third channel 103; compared with the prior art, the gas released from the air outlet 13 of the present invention enters the air cavity 41 with uniform air flow, and then a part of the gas passes through the exhaust channel 42 and enters the third channel 103, the second channel 102 and the first channel 101 and then overflows. Since the width W1 of the first channel 101 and the width W3 of the third channel 103 are both smaller than the width of the second channel W2, the gas flow rate will be accelerated when passing through the third channel 103 and the first channel 101, and an air curtain will be formed at the edge of the turntable 3 to effectively prevent sharp debris and powder particles from entering the interior of the turntable. It has the advantage of eliminating the need for plastic seals and can also effectively prevent cutting fluid from entering the motor, preventing damage to the bearings inside the motor and burning of the motor coils to cause significant economic losses, and reducing turntable maintenance.

[0019] In order to improve the sealing effect of the air cavity 41 , a sealing member 5 is provided between the turntable connector 1 and the sealing connector 4 so that the gas in the air cavity 41 is discharged only through the exhaust channel 42 .

[0020] Specifically, the turntable 3 is provided with a plurality of serrated first grooves 100 in the second channel 102. The turntable 3 is driven to rotate by the rotating shaft of the motor 2. The turntable connector 1 and the sealing connector 4 are fixed. The function of the plurality of serrated first grooves 100 is that after the liquid or dust passes through the first channel 101 into the second channel 102, due to the rotation of the turntable 3, the liquid or dust that cannot be prevented by the air curtain will be thrown out of the first channel 101 due to the centrifugal effect, and the gas will form a vortex airflow in the second flow channel 102, further effectively isolating the liquid or dust from entering the interior of the turntable 3.

[0021] Furthermore, the side of the sixth protrusion 32 closest to the axis cooperates with the sealing connector 4 to form a fourth channel 104. The turntable 3 is provided with three second grooves 33, and the turntable connector 1 is correspondingly provided with three third protrusions 14 that extend into the second grooves 33 to form a sixth channel 106. The third protrusions 14 of the turntable connector 1 cooperate with the second grooves 33 of the turntable to form the circuitous sixth channel 106, effectively slowing the flow of gas and creating resistance to the continued inflow of liquid or dust, thereby effectively isolating the liquid or dust.

[0022] Specifically, a fifth channel 105 is provided between the fourth channel 104 and the sixth channel 106, connecting the fourth channel 104 and the sixth channel 106. Gas released from the gas outlet 13 enters the gas chamber 41, which functions as a uniform gas flow, and then partially flows through the exhaust channel 42 into the fourth channel 104, the fifth channel 105, and the sixth channel 106. The gas escaping from the sixth channel 106 dissipates heat from the bearings of the motor 2, effectively extending the bearing life of the motor 2.

[0023] The sealing connector 4 is provided with a third groove 43 . The third groove 43 is used to store liquid or dust entering the fifth channel 105 , and can also prevent the liquid or dust from entering the interior of the turntable 3 .

[0024] Optionally, a slope 15 is provided on a side of the first protrusion 11 away from the second protrusion 12 . The slope 15 has the function of blocking liquid or dust and reducing the flow rate of the liquid or dust, thereby preventing the liquid or dust from entering the turntable 3 .

[0025] In addition, the first channel 101, the third channel 103, and the fourth channel 104 are all arranged longitudinally, and the second channel 102 and the fifth channel 105 are all arranged transversely. The longitudinal arrangement of the first channel 101, the third channel 103, and the fourth channel 104 makes it difficult for liquid or dust to flow into the interior of the motor 2.

[0026] like Figures 6 to 9As shown, a machine tool of the present invention includes a cradle 6, two swing arms 7 and the aforementioned motor-driven turntable sealing device, the two swing arms 7 are respectively fixed on both sides of the cradle 6, the motor 2 is installed in the cradle 6, the turntable connector 1 is provided with a first screw hole 16 and a third screw 17, the third screw 16 is inserted into the first screw hole 17 and then threadedly connected to the cradle 6, the two swing arms 7 are provided with a second screw hole 71 and a fourth screw 72, the fourth screw 72 is inserted into the second screw hole 71 and then threadedly connected to the cradle 6, the upper end of the fourth screw hole 72 is provided with a plug 8 for sealing the second screw hole 72, and a sealing ring 9 is provided between the turntable connector 1 and the two swing arms 7. The plug 8 and the sealing ring 9 are used to prevent the motor 2 from failing due to the infiltration of liquid or dust in the installation gap. The present invention has the beneficial effects of the aforementioned motor-driven turntable sealing device.

[0027] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A motor-driven turntable sealing device, characterized in that: include: A turntable connecting member is fixed above the motor and is provided with a first protrusion and a second protrusion in the radial direction, and an air outlet connected to the air supply pipe is provided between the first protrusion and the second protrusion; A turntable is provided above the turntable connecting member, connected to the motor and driven to rotate by the motor, wherein the turntable is sequentially provided with a fifth protrusion and a sixth protrusion in a radial direction, wherein a side of the fifth protrusion close to the axis direction cooperates with a side of the first protrusion away from the axis center to form a first channel, a portion between the fifth protrusion and the sixth protrusion cooperates with the first protrusion to form a second channel, a side of the first protrusion close to the axis direction cooperates with a side of the sixth protrusion away from the axis center to form a third channel, the first channel, the second channel and the third channel are sequentially interconnected, and the widths of the first channel and the third channel are both smaller than the width of the second channel; A sealing connector is connected to the turntable connector and is arranged between the first protrusion and the second protrusion of the turntable connector. The sealing connector is provided with an air cavity with an air uniforming function connected to the air outlet and an exhaust channel. One end of the exhaust channel is connected to the air cavity, and the other end is connected to the third channel.

2. The motor-driven turntable sealing device according to claim 1, characterized in that: A sealing member is provided between the turntable connecting member and the sealing connecting member.

3. The motor-driven turntable sealing device according to claim 1, characterized in that: The turntable is provided with a plurality of sawtooth-shaped first grooves in the second channel.

4. The motor-driven turntable sealing device according to claim 1, characterized in that: The side of the sixth protrusion close to the axis cooperates with the sealing connector to form a fourth channel. The turntable is provided with a plurality of second grooves. Correspondingly, the turntable connector is provided with a plurality of third protrusions extending into the second grooves to form a sixth channel. A fifth channel is provided between the fourth channel and the sixth channel to connect the fourth channel with the sixth channel.

5. The motor-driven turntable sealing device according to claim 1, characterized in that: The sealing connection piece is provided with a third groove.

6. The motor-driven turntable sealing device according to claim 1, characterized in that: A slope is provided on a side of the first protrusion away from the second protrusion.

7. The motor-driven turntable sealing device according to claim 4, characterized in that: The first channel, the third channel and the fourth channel are all arranged longitudinally.

8. The motor-driven turntable sealing device according to claim 4, characterized in that: The second channel and the fifth channel are both arranged horizontally.

9. A machine tool, characterized in that: A motor-driven turntable sealing device according to any one of claims 1 to 8.

10. A machine tool according to claim 9, characterized in that: The machine tool also includes a cradle and two swing arms, the two swing arms are respectively fixed on both sides of the cradle, the motor is installed in the cradle, the turntable connecting piece is provided with a first screw hole and a third screw, the first screw is inserted into the first screw hole and then threadedly connected to the cradle, the two swing arms are provided with a second screw hole and a fourth screw, the second screw is inserted into the second screw hole and then threadedly connected to the cradle, the upper end of the second screw hole is provided with a plug for sealing the second screw hole, and a sealing ring is provided between the turntable connecting piece and the two swing arms.

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