Protective device of numerical control lathe for fan production

Abstract

The protective device of the numerical control lathe for fan production comprises a protective box, driving equipment is fixedly installed at the upper end of the protective box, a connecting frame of an n-shaped structure is fixedly connected to the upper end of the protective box, telescopic equipment is connected to the upper end of the connecting frame, and a center shaft is fixedly connected to the output end of the driving equipment. On the basis that the driving equipment transmits torque to the lower rotating disc and the machining head through the center shaft and the spline cylinder which are in spline fit and the upper meshing ring and the lower meshing ring which are meshed, once the induction assembly induces a danger signal, the driving equipment is driven to rotate; the power assembly, the first elastic guide assembly and the second elastic guide assembly enable the upper meshing ring to be separated from the lower meshing ring and enable the brake face to make contact with the brake ring, the situation that driving equipment cannot be stopped without control is avoided, rapid brake speed reduction can be conducted on the lower rotating disc and the machining head, the situation that the machining head hurts the human body under the inertia effect is avoided, and the use safety is improved.

Description

Technical Field

[0001] This invention relates to the field of safety protection technology for CNC machine tools, and in particular to a protective device for a CNC lathe used in fan production. Background Technology

[0002] In the production and processing of fans, CNC machine tools are used to process their components. During operation, the spindle of the CNC machine tool rotates at high speed. Operators are inevitably at risk of contact with the spindle due to various factors, leading to serious accidents such as injury or even death. Traditional technology only uses an emergency stop button, which requires a certain reaction time to operate, resulting in low safety. Furthermore, after pressing the emergency stop button, the motor shaft and spindle still have a certain inertia, and the speed cannot be reduced quickly enough, failing to truly provide protection.

[0003] To address this, we propose a protective device for CNC lathes used in fan production. This device promptly disengages the drive equipment from the machining head when a person approaches the spindle and applies a brake to the machining head, effectively reducing speed and preventing accidents. Summary of the Invention

[0004] The present invention aims to provide a protective device for CNC lathes used in wind turbine production to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A protective device for a CNC lathe used in wind turbine production includes a protective housing. A drive unit is fixedly mounted on the upper end of the protective housing. A U-shaped connecting frame is fixedly connected to the upper end of the protective housing. A telescopic device is connected to the upper end of the connecting frame. A central shaft is fixedly connected to the output end of the drive unit. The lower end of the central shaft passes through the upper end of the protective housing and is rotatably connected thereto. A splined cylinder that splines with the central shaft is provided inside the protective housing. An upper rotating disk is fixedly connected to the lower end of the splined cylinder. An upper engagement ring is fixedly connected to the lower end of the upper rotating disk. A lower rotating disk is rotatably connected to the lower end of the protective housing. A lower engagement ring is fixedly connected to the upper engagement ring. The lower rotating disk engages and disengages with the upper engagement ring. A machining head is detachably fixedly connected to the lower end of the lower rotating disk. Multiple sensing components are evenly embedded in a ring around the machining head at the lower end of the protective housing. A brake ring is concentrically fixedly connected to the outer wall of the lower rotating disk. The splined cylinder... A lifting plate is rotatably sleeved on the cylinder. Between the lifting plate and the protective box, there is a power component for lowering the lifting plate and a first elastic guide component for raising the lifting plate. Multiple driven rods are uniformly and annularly fixed to the lower end of the lifting plate around the central axis. Each driven rod has an integrally formed active block at its lower end. The active block has an inclined active surface, with the end of the active surface closer to the brake ring being the lower end and the end farther from the brake ring being the upper end. Multiple brake blocks are uniformly distributed in an annular shape at the bottom of the protective box, and the positions of the multiple brake blocks correspond one-to-one with the multiple active blocks. Each brake block consists of an upper block and a sliding block that are integrally formed and distributed vertically. The side of the brake block closer to the brake ring has an arc-shaped brake surface. The other side of the upper block opposite the brake surface has a passive surface, and the passive surface slides in contact with the active surface. The other side of the sliding block opposite the brake surface has a vertical surface. The sliding block is connected to the inner wall of the protective box by a second elastic guide component.

[0006] Preferably, the upper end of the splined cylinder is provided with a spline groove that mates with the spline of the central shaft.

[0007] Preferably, the power assembly includes a permanent magnet ring and an electromagnetic ring, which are respectively fixedly installed on the upper end of the lifting plate and the upper end of the protective box, and the permanent magnet ring and the electromagnetic ring are arranged to repel each other.

[0008] Preferably, there are two first elastic guide components, and the two elastic guide components are symmetrically distributed about the spline cylinder. Each elastic guide component includes a guide rod fixedly connected to the top of the protective box. The lower end of the guide rod is fixedly connected to a limit plate. A vertical spring is sleeved on the guide rod, and the two ends of the vertical spring are fixedly connected to the lifting plate and the limit plate, respectively.

[0009] Preferably, the lower end of the upper occlusal ring has a plurality of upper occlusal teeth evenly distributed in a ring, and the upper occlusal ring forms an upper tooth groove between every two adjacent upper occlusal teeth; the upper end of the lower occlusal ring has a plurality of lower occlusal teeth evenly distributed in a ring, and the lower occlusal ring forms a lower tooth groove between every two adjacent lower occlusal teeth.

[0010] Preferably, each of the upper tooth grooves is provided with an upper magnetic block, and each of the lower biting teeth is provided with a lower magnetic block, and the lower magnetic block and the upper magnetic block are magnetically attracted to each other.

[0011] Preferably, the second elastic guide component includes a limiting rod fixedly connected to the inner wall of the protective box, a sliding groove slidably connected to the limiting rod in the vertical surface, the limiting rod having a rectangular cross-section, a transverse spring being sleeved on the limiting rod, and the two ends of the transverse spring being fixedly connected to the vertical surface and the inner wall of the protective box, respectively.

[0012] Preferably, the sensing component is one or more of a human body sensor, a vision processing system, and a material detection sensor.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention, based on the principle that the drive device transmits torque to the lower rotating disk and processing head through the splined central shaft and splined cylinder, and the meshing upper and lower engagement rings, enables the power component, the first elastic guide component, and the second elastic guide component to separate the upper and lower engagement rings and bring the brake surface into contact with the brake ring once the sensing component detects a danger signal. This prevents the drive device from becoming uncontrollable and unable to stop, and also enables rapid braking and deceleration of the lower rotating disk and processing head, preventing the processing head from causing injury to the human body due to inertia, thus improving safety during use. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a protective device for a CNC lathe used in wind turbine production, as proposed in this invention. Figure 2 This is a front view of the structural cross-section of a protective device for a CNC lathe used in wind turbine production, as proposed in this invention. Figure 3 This is a three-dimensional structural diagram of the engagement ring on the protective device of a CNC lathe for wind turbine production proposed in this invention, viewed from below. Figure 4 This is a bottom view of the protective device for a CNC lathe used in wind turbine production, as proposed in this invention. Figure 5 This is a three-dimensional structural diagram of the brake block of the protective device for a CNC lathe used in wind turbine production, as proposed in this invention, from a single perspective. Figure 6 This is a three-dimensional structural diagram of the brake block of the protective device for a CNC lathe used in wind turbine production, as proposed in this invention, from another perspective.

[0015] In the diagram: 1 Protective box, 2 Drive device, 3 Central shaft, 4 Splined cylinder, 41 Splined groove, 5 Upper rotating disk, 6 Upper engagement ring, 61 Upper engagement tooth, 62 Upper tooth groove, 63 Upper magnetic block, 7 Lower rotating disk, 8 Lower engagement ring, 9 Processing head, 10 Sensing component, 11 Lifting plate, 12 Guide rod, 13 Limiting plate, 14 Vertical spring, 15 Permanent magnet ring, 16 Electromagnetic ring, 17 Driven rod, 18 Driving block, 181 Driving surface, 19 Brake block, 191 Upper block, 1911 Brake surface, 1912 Passive surface, 192 Sliding block, 1921 Vertical surface, 20 Limiting rod, 21 Horizontal spring, 22 Brake ring, 23 Connecting frame, 24 Telescopic device. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Reference Figure 1-6 A protective device for a CNC lathe used in wind turbine production includes a protective box 1, a drive device 2 fixedly installed on the upper end of the protective box 1, a U-shaped connecting frame 23 fixedly connected to the upper end of the protective box 1, and a telescopic device 24 connected to the upper end of the connecting frame 23. The telescopic device 24 is responsible for the forward and backward movement of the processing head 9, and the drive device 2 is responsible for the power output of the processing head 9.

[0018] The output end of the drive device 2 is fixedly connected to a central shaft 3. The lower end of the central shaft 3 passes through the upper end of the protective box 1 and is rotatably connected to it. The protective box 1 is provided with a splined cylinder 4 that splines with the central shaft 3. Correspondingly, the upper end of the splined cylinder 4 is provided with a splined groove 41 that splines with the central shaft 3. The lower end of the splined cylinder 4 is fixedly connected to an upper rotating disk 5. The lower end of the upper rotating disk 5 is fixedly connected to an upper engagement ring 6. The drive device 2 drives the upper rotating disk 5 and the upper engagement ring 6 to rotate through the splined central shaft 3 and splined groove 41.

[0019] The lower end of the protective box 1 is rotatably connected to a lower rotating disk 7, and the upper end of the lower rotating disk 7 is fixedly connected to a lower engagement ring 8. The lower engagement ring 8 and the upper engagement ring 6 are used for disengagement and engagement. The disengagement and engagement here includes separation and engagement. When in the disengaged state, power cannot be transmitted. When in the engaged state, power can be transmitted.

[0020] The upper occlusal ring 6 has a plurality of upper occlusal teeth 61 evenly distributed in a ring at its lower end. The upper occlusal ring 6 forms an upper tooth groove 62 between every two adjacent upper occlusal teeth 61. The lower occlusal ring 8 has a plurality of lower occlusal teeth evenly distributed in a ring at its upper end. The lower occlusal ring 8 forms a lower tooth groove between every two adjacent lower occlusal teeth. When the upper occlusal ring 6 and the lower occlusal ring 8 are engaged, the upper occlusal teeth 61 are located in the lower tooth groove and the lower occlusal teeth are located in the upper tooth groove 62.

[0021] Each upper tooth groove 62 is fitted with an upper magnetic block 63, and each lower meshing tooth is fitted with a lower magnetic block. The lower magnetic block and the upper magnetic block 63 are magnetically attracted to each other. The magnetic properties of the lower magnetic block and the upper magnetic block 63 are relatively small. The purpose of setting them is to quickly align the upper meshing ring 6 and the lower meshing ring 8 when they are about to mesh, so as to avoid affecting the meshing of the two due to misalignment.

[0022] A machining head 9 is detachably and fixedly connected to the lower end of the lower rotating disk 7. The machining head 9 can be a drill bit, grinding head, etc. Different types of machining heads 9 need to be replaced according to the processing needs of the fan parts. Multiple sensing components 10 are evenly embedded in a ring around the machining head 9 at the lower end of the protective box 1. The sensing components 10 are one or more of the following: human body sensor, vision processing system, and material detection sensor. It should be noted that when the sensing component 10 is a human body sensor and the human body sensor adopts the infrared sensing principle, the overall temperature of the CNC machine tool should be kept away from 36-37℃, which may affect the human body sensing. When the sensing component 10 is a vision processing system, it can detect human skin, clothing, hair, etc. that are close to the machining head 9 and send signals in time. The sensing component 10 can also be a material detection sensor, which can detect materials including human skin material, clothing material, hair material, etc. Any two or all three can be used simultaneously. The sensing components 10 adopt the intelligent elements or systems in the prior art, which will not be described in detail here.

[0023] A brake ring 22 is concentrically fixed to the outer wall of the lower rotating disk 7. A lifting plate 11 is rotatably sleeved on the splined cylinder 4. A power component for lowering the lifting plate 11 and a first elastic guide component for raising the lifting plate 11 are provided between the lifting plate 11 and the protective box 1. The power component and the first elastic guide component complement each other, and their functions are to lower and raise respectively.

[0024] Specifically, the power assembly includes a permanent magnet ring 15 and an electromagnetic ring 16, which are respectively fixedly installed on the upper end of the lifting plate 11 and the top of the protective box 1. The permanent magnet ring 15 and the electromagnetic ring 16 are arranged to repel each other, and the lifting plate 11 is driven to move by magnetic repulsion. Other sensitive devices can also be used.

[0025] The first elastic guide assembly consists of two components, which are symmetrically distributed about the splined cylinder 4. Specifically, the elastic guide assembly includes a guide rod 12 fixedly connected to the top of the protective box 1. The lower end of the guide rod 12 is fixedly connected to a limiting plate 13. A vertical spring 14 is sleeved on the guide rod 12, and the two ends of the vertical spring 14 are fixedly connected to the lifting plate 11 and the limiting plate 13, respectively. The guide rod 12 guides the lifting of the lifting plate 11, and the limiting plate 13 supports the vertical spring 14. The elastic force of the vertical spring 14 can reset each structural component.

[0026] Multiple driven rods 17 are uniformly and annularly fixed to the lower end of the lifting plate 11 around the central axis 3. Each driven rod 17 has an integrally formed driving block 18 at its lower end. The driving block 18 has an inclined driving surface 181, with the end of the driving surface 181 closest to the brake ring 22 being the lower end and the end furthest from the brake ring 22 being the upper end. (Refer to...) Figure 2 .

[0027] Multiple brake blocks 19 are evenly distributed in a ring at the bottom of the protective box 1, and the positions of the multiple brake blocks 19 correspond one-to-one with the positions of multiple active blocks 18. Each brake block 19 is composed of an upper block 191 and a sliding block 192 that are distributed vertically and integrally formed. The side of the brake block 19 near the brake ring 22 is provided with an arc-shaped brake surface 1911, which is more in line with the structural features of the brake ring 22. The other side of the upper block 191 opposite to the brake surface 1911 is provided with a passive surface 1912, and the passive surface 1912 slides and fits against the active surface 181. Power is transmitted through the passive surface 1912 and the active surface 181. The other side of the sliding block 192 opposite to the brake surface 1911 is provided with a vertical surface 1921. The sliding block 192 is connected to the inner wall of the protective box 1 by a second elastic guide component.

[0028] Specifically, the second elastic guide component includes a limiting rod 20 fixedly connected to the inner wall of the protective box 1. A sliding groove is provided in the vertical surface 1921 to slide in connection with the limiting rod 20. The cross-section of the limiting rod 20 is rectangular. Compared with a circular structure, the sliding block 192 slides more stably. A transverse spring 21 is provided on the outer sleeve of the limiting rod 20. The two ends of the transverse spring 21 are fixedly connected to the vertical surface 1921 and the inner wall of the protective box 1, respectively. The elastic force of the transverse spring 21 can reset the brake block 19.

[0029] It should be noted in advance that: 1. The elastic coefficient of the vertical spring 14 is much greater than that of the horizontal spring 21. Therefore, the lifting plate 11 and the driven rod 17 and the driving block 18 connected to it are more affected by the elastic force of the vertical spring 14 than by the elastic force of the horizontal spring 21; 2. The electromagnetic ring 16, the driving device 2, and the telescopic device 24 in this invention are all electrically connected to and controlled by the controller. The sensing component 10 is connected to the controller signal to send danger signals in a timely manner; Since this invention uses the magnetic field of the electromagnetic ring 16 and the permanent magnet ring 15 to cooperate, in order to avoid being affected by or interfering with the external magnetic field, the protective box 1 and the lifting plate 11 are made of magnetic shielding material.

[0030] The working principle of this invention is as follows: When the CNC machine tool is idle, the electromagnetic ring 16 in the power assembly is de-energized. Under the elastic support of the vertical spring 14, the splined cylinder 4 is in the upper position inside the protective box 1. The upper engagement ring 6 and the lower engagement ring 8 are separated. The brake block 19 is in the upper position of the active block 18. At this time, the transverse spring 20 is in the stretched state, the brake surface 1911 is in contact with the brake ring 22, and the machining head 9 is in the locked state.

[0031] When the CNC machine tool needs to process the fan parts, the electromagnetic ring 16 in the power component is energized. The electromagnetic ring 16 generates a magnetic repulsion force on the permanent magnet ring 15, which drives the lifting plate 11 and spline cylinder 4 to descend, compressing the vertical spring 14, so that the upper engagement ring 6 and the lower engagement ring 8 mesh. The driving block 18 descends relative to the brake block 19. The brake block 19 moves away from the lower rotating disk 7 under the reset of the transverse spring 21. The brake surface 1911 separates from the brake ring 22, and the processing head 9 is in a free state. The drive device 2 transmits torque to the processing head 9 in sequence through the spline-fitted central shaft 3 and spline cylinder 4, and the meshing upper engagement ring 6 and lower engagement ring 8 to perform the processing operation.

[0032] When the CNC machine tool is in operation, if the operator's body part gets close to the machining head 9, it will be sensed by the sensing component 10. The sensing component 10 will feed the signal back to the controller, which will simultaneously control the drive device 2 to stop and de-energize the electromagnetic ring 16. Under the elastic force of the vertical spring 14 and the horizontal spring 21, the other structural components will be reset to the state described in the first point. Even if the drive device 2 malfunctions and cannot stop, the drive device 2 will not be able to drive the machining head 9. After the upper engagement ring 6 and the lower engagement ring 8 separate, the brake surface 1911 contacts the brake ring 22, thereby increasing the frictional resistance of the lower rotating disk 7 which is still rotating under inertia, efficiently reducing the speed, and avoiding damage to the human body under inertia.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A protective device for a CNC lathe used in wind turbine manufacturing, characterized in that: The device includes a protective box (1), a drive device (2) is fixedly installed on the upper end of the protective box (1), a U-shaped connecting frame (23) is fixedly connected to the upper end of the protective box (1), a telescopic device (24) is connected to the upper end of the connecting frame (23), a central shaft (3) is fixedly connected to the output end of the drive device (2), the lower end of the central shaft (3) passes through the upper end of the protective box (1) and is rotatably connected to it, a splined cylinder (4) that splines with the central shaft (3) is provided inside the protective box (1), an upper rotating disk (5) is fixedly connected to the lower end of the splined cylinder (4), and an upper rotating disk (5) is fixedly connected to the lower end of the upper rotating disk (5). The lower end of the protective box (1) is rotatably connected to a lower rotating disk (7), and the upper end of the lower rotating disk (7) is fixedly connected to a lower engagement ring (8). The lower engagement ring (8) is used in conjunction with the upper engagement ring (6). The lower end of the lower rotating disk (7) is detachably fixedly connected to a processing head (9). The lower end of the protective box (1) is uniformly embedded with multiple sensing components (10) in a ring around the processing head (9). The outer wall of the lower rotating disk (7) is concentrically fixedly connected to a brake ring (22). A lifting plate (11) is rotatably sleeved on the splined cylinder (4). A means of communication is provided between the lifting plate (11) and the protective box (1). The lifting plate (11) has a power assembly for lowering and a first elastic guide assembly for raising. Multiple driven rods (17) are uniformly and annularly fixed to the lower end of the lifting plate (11) around a central axis (3). Each driven rod (17) has an integrally formed drive block (18) at its lower end. The drive block (18) has an inclined drive surface (181), with the end of the drive surface (181) near the brake ring (22) being the lower end and the end away from the brake ring (22) being the upper end. Multiple brake blocks (19) are uniformly distributed annularly at the bottom of the protective box (1), and the multiple brake blocks (19) and the multiple drive blocks (181) are connected in a ring. 8) The positions correspond one-to-one. The brake block (19) is composed of an upper block (191) and a sliding block (192) that are distributed vertically and integrally formed. The brake block (19) has an arc-shaped brake surface (1911) on the side near the brake ring (22). The upper block (191) has a passive surface (1912) on the other side opposite to the brake surface (1911), and the passive surface (1912) slides and fits against the active surface (181). The sliding block (192) has a vertical surface (1921) on the other side opposite to the brake surface (1911). The sliding block (192) is connected to the inner wall of the protective box (1) with a second elastic guide component.

2. The protective device for a CNC lathe used in wind turbine production according to claim 1, characterized in that: The upper end of the splined cylinder (4) is provided with a spline groove (41) that mates with the spline of the central shaft (3).

3. The protective device for a CNC lathe used in wind turbine production according to claim 1, characterized in that: The power assembly includes a permanent magnet ring (15) and an electromagnetic ring (16) respectively fixedly installed on the upper end of the lifting plate (11) and the top of the protective box (1), and the permanent magnet ring (15) and the electromagnetic ring (16) are arranged to repel each other.

4. The protective device for a CNC lathe used in wind turbine production according to claim 1, characterized in that: The first elastic guide component has two components, and the two elastic guide components are symmetrically distributed about the spline cylinder (4). The elastic guide component includes a guide rod (12) fixedly connected to the top of the protective box (1). The lower end of the guide rod (12) is fixedly connected to a limiting plate (13). The guide rod (12) is covered with a vertical spring (14), and the two ends of the vertical spring (14) are fixedly connected to the lifting plate (11) and the limiting plate (13) respectively.

5. A protective device for a CNC lathe used in wind turbine production according to claim 1, characterized in that: The lower end of the upper occlusal ring (6) has a plurality of upper occlusal teeth (61) evenly distributed in a ring. The upper occlusal ring (6) forms an upper tooth groove (62) between every two adjacent upper occlusal teeth (61). The upper end of the lower occlusal ring (8) has a plurality of lower occlusal teeth evenly distributed in a ring. The lower occlusal ring (8) forms a lower tooth groove between every two adjacent lower occlusal teeth.

6. The protective device for a CNC lathe used in wind turbine production according to claim 5, characterized in that: Each of the upper tooth grooves (62) is provided with an upper magnetic block (63), and each of the lower meshing teeth is provided with a lower magnetic block, and the lower magnetic block and the upper magnetic block (63) are magnetically attracted to each other.

7. The protective device for a CNC lathe used in wind turbine production according to claim 1, characterized in that: The second elastic guide assembly includes a limiting rod (20) fixedly connected to the inner wall of the protective box (1). A sliding groove is provided in the vertical surface (1921) to slide with the limiting rod (20). The cross section of the limiting rod (20) is rectangular. A transverse spring (21) is provided on the limiting rod (20), and the two ends of the transverse spring (21) are fixedly connected to the vertical surface (1921) and the inner wall of the protective box (1), respectively.

8. The protective device for a CNC lathe used in wind turbine production according to claim 1, characterized in that: The sensing component (10) is one or more of the following: human body sensor, vision processing system, and material detection sensor.

Images