High-speed motor for trimming plate

Abstract

The utility model discloses a high -speed motor is used to board edge trimming belongs to processing machinery field, including casing and front bearing, and the front bearing fixed mounting is in one end of casing, and the inside fixed connection of front bearing has the main shaft, and the fixed sleeve of main shaft has rotor, and the inside fixed mounting of casing has stator, and the stator sleeve sets in the outside of rotor, and the inside of casing is provided with cooling liquid flow channel, and the one end fixed mounting of casing outside near front bearing has the heat dissipation module, and the heat dissipation module includes cooling channel and annular air chamber, and the inside wall of annular air chamber is provided with a plurality of gas outlet micropore. The application realizes the targeted cooling of the main shaft through the cooling channel, reduces the working temperature of the front end of the main shaft from the root, ensures the extremely high size precision and surface machining quality, the gas output by the annular air chamber as refrigerant realizes the sealing effect while realizing the cooling effect, ensures that the bearing runs more smoothly, the cutting load capacity is stronger, the machining surface is smoother, and prolongs the service life of the cutter.

Description

Technical Field

[0001] This utility model belongs to the field of processing machinery, and specifically relates to a high-speed motor for trimming sheet metal. Background Technology

[0002] High-speed motors for sheet metal trimming are the core power source for trimming machines, edge-sealing and trimming integrated machines, and other similar equipment. They drive milling cutters, blades, and other actuators to rotate at high speeds, achieving precision processing such as burr removal, chamfering, and shaping of the sheet metal edges. The performance of this type of motor directly determines the trimming accuracy, processing efficiency, and equipment lifespan. The motor spindle needs to operate at high speeds of tens of thousands of revolutions per minute for extended periods, placing extremely high demands on the heat dissipation performance, rotational accuracy, and operational reliability of its core components.

[0003] Currently, the common high-speed motor spindle structure mainly includes a housing, a stator housed within the housing, a rotor that mates with the stator, a main shaft coaxially mounted with the rotor, and a bearing assembly supporting the main shaft. In order to control the heat generation of the stator and rotor at high speeds, traditional high-speed motors usually have a circulating coolant jacket installed in the housing to effectively cool the stator. However, for the front bearing assembly, the frictional heat generated by its own high-speed operation is difficult to dissipate effectively. In the existing technology, the heat dissipation of the bearing mainly relies on the following two methods: (1) transferring heat to the housing through heat conduction, which is indirectly carried away by the main coolant jacket; (2) carrying away some heat through the lubricating medium (grease or oil mist). Method (1) has a long heat transfer path and high thermal resistance, resulting in limited cooling effect; method (2) is less efficient, and if the lubricating medium is grease, its heat capacity is limited; if it is oil mist, it may cause environmental pollution and waste.

[0004] Therefore, there is an urgent need for an innovative structural design that can effectively solve the heat dissipation problem of the front bearing of the high-speed motor used for trimming sheet metal. Utility Model Content

[0005] The purpose of this invention is to provide a high-speed motor for trimming sheet metal in order to solve the above problems. To achieve the above objectives, the technical solution of this utility model is as follows: it includes a housing and a front bearing. The front bearing is fixedly installed at one end of the housing. A main shaft is fixedly connected inside the front bearing. A rotor is fixedly sleeved on the main shaft. A stator is fixedly installed inside the housing. The stator is sleeved on the outside of the rotor. A coolant flow channel is opened inside the housing. A heat dissipation module is fixedly installed at one end of the outer side of the housing near the front bearing. The heat dissipation module includes a cooling channel and an annular air chamber. A plurality of air outlet microholes are opened on the inner wall of the annular air chamber.

[0006] Through the above technical solution: the rotor uses high-performance permanent magnet materials, the cooling channel is connected to a circulating coolant, the heat dissipation module cools the front bearing and the spindle near the tool, and works with the coolant flow channel in the housing to comprehensively and effectively cool the motor. The flow resistance of the exhaust micro-hole is greater than the flow resistance inside the annular air chamber. The annular air chamber forms a protective layer of airflow blowing towards the tool at the opening of the front bearing. This not only removes the heat generated by the shaft rotation, but also acts as a seal to prevent wear caused by the intrusion of contaminants such as wood chips and lubricating oil during the trimming of the sheet metal. This effectively achieves a sealing effect, assists in heat dissipation, extends the service life of the high-speed motor, and improves the precision, stability and reliability of the high-speed motor.

[0007] As a further embodiment of this utility model: the exhaust micro-holes are evenly distributed along the circumference of the heat dissipation module, and the angle between the radial direction of the exhaust micro-holes and the radial direction of the main shaft is 30-60°.

[0008] Through the above technical solution: the circumferentially evenly distributed micropores can form a continuous, uniform, and dead-angle-free annular air curtain, ensuring consistent sealing and cooling of the entire circumference of the bearing, avoiding the problem of weak local protection or uneven heat dissipation caused by uneven airflow; the design of this tilt angle optimizes the airflow direction, forming a cylindrical air curtain pointing away from the front bearing, enhancing the sealing ability of the gap between the spindle and the end cover, and maximizing the sealing and cooling effect.

[0009] As a further aspect of this invention: the annular air chamber is connected to a stable clean air source, the pressure of which is 0.1-0.25 Bar higher than the ambient air pressure.

[0010] By using the above technical solution, the pressure can be precisely controlled within this range, which can form an effective positive pressure barrier for reliable sealing, while avoiding excessive pressure that could cause the lubricating medium to be blown away or generate unnecessary airflow noise, thus achieving the best balance between sealing effect and operating economy.

[0011] As a further embodiment of this utility model: the annular air chamber is fixedly connected to the cooling channel, the cooling channel is a spiral channel, and the annular air chamber is located near the front bearing.

[0012] Through the above technical solution, the spiral channel maximizes the path length and heat exchange area of ​​the coolant within the limited module space, making the heat exchange between the coolant and the bearing more thorough and efficient, thereby improving the effect of targeted cooling.

[0013] As a further embodiment of this invention: the cooling channel and the coolant flow channel are connected in parallel via a pipe.

[0014] The above technical solutions ensure that the parallel connection method guarantees a sufficient and independently controllable flow of coolant to the front-end integrated module, avoiding the problems of insufficient flow and pressure drop that may occur when connected in series with the coolant flow channel, thus ensuring the strength and stability of front-end cooling. The cooling channel uses a high thermal conductivity metal material, which can greatly promote the heat transfer efficiency from the main axis to the cooling channel, so that the cooling effect of the coolant can act on the heat source faster and more directly, further improving the heat dissipation performance of the entire system.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The spiral cooling channel made of high thermal conductivity material achieves targeted cooling of the front bearing, which reduces the working temperature of the front end of the spindle (critical tool mounting part) from the source. It directly intercepts and dissipates heat from the heat conduction path, which greatly reduces the tool lifting phenomenon caused by spindle thermal deformation. For plate trimming and engraving operations that require long-term deep precision, it ensures extremely high dimensional accuracy and surface finish.

[0016] 2. The gas output from the annular gas chamber located at the front bearing acts as a coolant, achieving a cooling effect on the bearing. Simultaneously, it continuously and stably outputs a positive pressure airflow slightly higher than the ambient air pressure, forming a conical air curtain pointing towards the spindle output end. This effectively covers critical components such as the outer ring and cage of the front bearing, reducing noise and blowing away contaminants that might approach through tiny gaps, achieving a sealing effect. This keeps the interior of the front bearing cavity clean, ensuring smooth bearing operation, vibration-free operation without impurities, stronger cutting load capacity, smoother machined surfaces, and extended tool life. It also prevents leakage of internal lubricating media. The seal life is synchronized with the air supply, essentially achieving maintenance-free operation and solving the hassle of periodically replacing traditional seals. Attached Figure Description

[0017] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the left view of the present invention; Figure 3 for Figure 2 Cross-sectional view at point AA; Figure 4 This is a rear view of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Housing; 2. Front bearing; 3. Main shaft; 4. Rotor; 5. Stator; 6. Coolant flow channel; 8. Cooling channel; 9. Annular air chamber; 91. Exhaust micropores. Detailed Implementation

[0019] The following will be combined with the appendix Figures 1-4 The technical solution of this utility model has been clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] See appendix Figures 1-4 A high-speed motor for trimming sheet metal includes a housing 1 and a front bearing 2. The front bearing 2 is fixedly installed at one end of the housing 1. A main shaft 3 is fixedly connected inside the front bearing 2. A rotor 4 is fixedly sleeved on the main shaft 3. A stator 5 is fixedly installed inside the housing 1 and sleeved on the outside of the rotor 4.

[0021] In this embodiment: the stator 5 is electrically connected to an external frequency converter, which delivers three-phase AC power to the stator 5 inside the housing 1. The energized stator 5 generates a rotating magnetic field with periodically changing polarity and intensity. The rotational speed (synchronous speed) of this magnetic field is precisely controlled by the frequency of the input current. The rotor 4, which is fixedly connected to the main shaft 3, is made of high-performance permanent magnet material, forming a strong inherent magnetic field. According to the principle of magnetic attraction, the magnetic poles of the rotor 4 will continuously "chase" the rotating magnetic field generated by the stator 5, thereby being strongly dragged by it and achieving synchronous rotation at the same speed.

[0022] See appendix Figures 1-4 The housing 1 has a coolant flow channel 6 inside. A heat dissipation module is fixedly installed on the outer side of the housing 1 near the front bearing 2. The heat dissipation module includes a cooling channel 8 and an annular air chamber 9. The annular air chamber 9 is fixedly connected to the cooling channel 8. The cooling channel 8 is a spiral channel. The annular air chamber 9 is located near the front bearing 2. The cooling channel 8 and the coolant flow channel 6 are connected in parallel through a pipe. The cooling channel 8 is made of a high thermal conductivity metal material.

[0023] In this embodiment: the spiral channel maximizes the path length and heat exchange area of ​​the coolant within the limited module space, making the heat exchange between the coolant and the bearing more thorough and efficient, thereby improving the targeted cooling effect; the parallel connection between the cooling channel 8 and the inlet of the coolant channel 6 ensures that there is a sufficient amount of independently controllable coolant diverted to the front integrated module, avoiding the problems of insufficient flow and pressure drop that may be caused by connecting it in series with the coolant channel 6, and ensuring the strength and stability of the front cooling; the high thermal conductivity material can greatly promote the efficiency of heat transfer from the spindle 3 to the cooling channel 8, so that the cooling effect of the coolant can act on the heat source faster and more directly, further improving the heat dissipation performance of the entire system.

[0024] See appendix Figures 1-3The annular air chamber 9 is located near the front bearing 2. Several air outlet micro-holes 91 are opened on the inner wall of the annular air chamber 9. The air outlet micro-holes 91 are evenly distributed along the circumference of the heat dissipation module. The radial angle between the air outlet micro-holes 91 and the radial angle between the radial angle of the main shaft 3 is 30-60°.

[0025] In this embodiment, the inclined and circumferentially evenly distributed micropores can form a continuous, uniform, and dead-angle-free annular air curtain. This air curtain points away from the front bearing 2, ensuring consistent sealing and cooling of the entire circumference of the bearing. This avoids problems such as weak local protection or uneven heat dissipation caused by uneven airflow. At the same time, it enhances the sealing ability of the gap between the spindle 3 and the end cover, maximizing the sealing and cooling effect. By precisely controlling the pressure within this range, an effective positive pressure barrier can be formed for reliable sealing, while avoiding excessive pressure that could cause the lubricating medium to be blown away or generate unnecessary airflow noise. This achieves the best balance between sealing effect and operating economy.

[0026] See appendix Figures 1-3 The annular air chamber 9 is connected to a stable clean air source, and the pressure of the clean air source is 0.1-0.25 Bar higher than the ambient air pressure.

[0027] In this embodiment, controlling the air pressure within this range not only forms an effective positive pressure barrier for reliable sealing, but also avoids excessive pressure that could cause the lubricating medium to be blown away or generate unnecessary airflow noise, thus achieving the best balance between sealing effect and operational economy.

[0028] During operation, the external frequency converter delivers three-phase AC power to the stator 5 inside the housing 1. The energized stator 5 generates a periodically changing rotating magnetic field, causing the rotor 4 to rotate under the influence of the magnetic field. The spindle 3, which is fixedly connected to the rotor 4, also rotates accordingly. The coolant flow channel 6 and the cooling channel 8 are both spiral-shaped and connected in parallel through pipes. The coolant in the coolant flow channel 6 dissipates heat from the stator 5, and the coolant in the cooling channel 8 dissipates heat from the spindle 3. Clean air is introduced into the annular air chamber 9. Since the flow resistance of the exhaust micro-hole 91 is greater than the flow resistance inside the annular air chamber 9, and there is an angle between the exhaust micro-hole 91 and the radial direction of the spindle 3, the gas flowing out of the exhaust micro-hole 91 forms a pressurized conical air curtain pointing towards the tool, causing the air around the spindle 3 to flow. This achieves both heat dissipation and sealing of the front bearing 2.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A high-speed motor for trimming sheet metal, comprising a housing (1) and a front bearing (2), characterized in that: The front bearing (2) is fixedly installed at one end of the housing (1). A main shaft (3) is fixedly connected inside the front bearing (2). A rotor (4) is fixedly sleeved on the main shaft (3). A stator (5) is fixedly installed inside the housing (1). The stator (5) is sleeved on the outside of the rotor (4). A coolant flow channel (6) is opened inside the housing (1). A heat dissipation module is fixedly installed at one end of the outer side of the housing (1) near the front bearing (2). The heat dissipation module includes a cooling channel (8) and an annular air chamber (9). A plurality of air outlet microholes (91) are opened on the inner wall of the annular air chamber (9).

2. A high speed motor for trimming a plate material according to claim 1, characterized in that: The exhaust micro-holes (91) are evenly distributed along the circumference of the heat dissipation module, and the radial angle between the exhaust micro-holes (91) and the radial angle between the main shaft (3) is 30-60°.

3. The high-speed motor for trimming a plate material according to claim 1, characterized in that: The annular air chamber (9) is connected to a stable clean air source, the pressure of which is 0.1-0.25 Bar higher than the ambient air pressure.

4. A high-speed motor for trimming sheet metal according to claim 1, characterized in that: The annular air chamber (9) is fixedly connected to the cooling channel (8), which is a spiral channel. The annular air chamber (9) is located near the front bearing (2).

5. A high-speed motor for trimming sheet metal according to claim 1, characterized in that: The cooling channel (8) and the coolant flow channel (6) are connected in parallel via pipes.

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