A pre-cut structure for processing a motor dust cover assembly

Abstract

The application relates to the cutting technical field and particularly relates to a pre-cutting structure for motor dust cover assembly machining, which comprises a horizontal adjusting seat, a vertical adjusting seat which is installed on the horizontal adjusting seat and can be lifted, and a rotatable rotating ring which is arranged on the upper surface of the vertical adjusting seat; the cutting blades slide along the radial direction of the fixing ring, and the inclined surface of the wedge-shaped protruding block extrudes and drives the cutting blades to slide; a transmission wheel is rotationally installed in the inner cavity of the rotating ring; a strip-shaped tooth which is in mesh with the annular tooth groove is arranged on the side wall of the lifting shaft; the beneficial effects are that the rotating ring is rotationally installed on the upper surface of the vertical adjusting seat, the dust cover body is buckled on the outside of the rotating ring from top to bottom, the rotating ring can drive multiple cutting blades to slide outwards at the same time when the rotating ring rotates, the sidewall of the dust cover body is extruded and cut from the inside of the dust cover body, the device can form multiple grooves on the sidewall of the dust cover body at one time, the working efficiency is high, and the sizes of the formed grooves are uniform and consistent.

Description

TECHNICAL FIELD

[0001] The application relates to the cutting technical field and particularly relates to a pre-cutting structure for motor dust cover assembly machining. BACKGROUND

[0002] The motor dust cover is a protective device for protecting the motor from dust invasion, and is usually made of metal, plastic or rubber and covers the ventilation opening or external key part of the motor shell.

[0003] As shown in FIG. Figure 1 The existing dust cover side wall is usually provided with a heat dissipation structure formed by stamping, and before the stamping process, the side wall of the dust cover is pre-cut to form a strip-shaped slot hole to prevent unnecessary deformation of the dust cover side wall during the stamping process.

[0004] However, at present, due to the large number of heat dissipation structures on the side wall of the motor dust cover, the traditional cutting equipment needs to be cut multiple times to meet the use requirement, which is low in cutting efficiency and difficult to keep the size of the cut slot hole consistent, thereby affecting the subsequent stamping process. Therefore, the application provides a pre-cutting structure for motor dust cover assembly machining to solve the above problems. SUMMARY

[0005] The application aims to provide a pre-cutting structure for motor dust cover assembly machining to solve the problems of low cutting efficiency and inconsistent size of the formed slot hole of the traditional cutting equipment for the dust cover.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a pre-cutting structure for motor dust cover assembly machining, comprising:

[0007] A horizontal adjusting seat is provided with a vertically adjustable seat which can be lifted, and the upper surface of the vertically adjustable seat is provided with a rotatable rotating ring, and the outer side of the rotating ring is placed with a dust cover body, and a fixing ring is arranged between the rotating ring and the dust cover body, and the fixing ring is fixedly connected with the upper surface of the vertically adjustable seat.

[0008] A plurality of cutting blades arranged in a ring array are arranged on the side wall of the fixing ring, the cutting blades slide along the radial direction of the fixing ring, the outer side wall of the rotating ring is fixedly provided with wedge-shaped protrusions corresponding to the plurality of cutting blades, and the inclined surface of the wedge-shaped protrusions extrudes and drives the cutting blades to slide.

[0009] The inner side wall of the rotating ring is fixedly provided with a worm gear, the inner cavity of the rotating ring is rotatably provided with a transmission wheel, the surface of the transmission wheel is fixedly provided with a helical tooth meshing with the worm gear, and the middle part of the surface of the transmission wheel is provided with an annular tooth groove.

[0010] The dust cover body is provided with an axis hole at the center, and the inner cavity of the axis hole is movably provided with a lifting shaft, and the side wall of the lifting shaft is provided with a strip-shaped tooth corresponding to the annular tooth groove.

[0011] Preferably, the fixing ring comprises a bottom ring and a top ring, and the two are fixedly connected by bolts, the side wall of the fixing ring is provided with a guide hole penetrating along the radial direction thereof, the outer side of the cutting blade is fixedly connected with a blade holder by bolts, and the blade holder is located in the inner cavity of the guide hole and is in sliding connection with the same, so that the cutting blade can be mounted.

[0012] Preferably, one end of the blade holder is rotatably provided with a pressure roller, and the pressure roller is in close contact with the inclined surface of the wedge-shaped protrusion, the inner side wall of the fixing ring is provided with a clearance groove corresponding to the wedge-shaped protrusion, the inner side wall of the guide hole is provided with a stepped groove, and the other end of the blade holder and the cutting blade are both located in the inner cavity of the stepped groove and are in sliding connection, so that the rotation of the wedge-shaped protrusion can be limited.

[0013] Preferably, a limiting sliding groove is provided in the middle of the blade holder, the inner cavity of the limiting sliding groove is provided with a limiting crosspiece, and the limiting crosspiece is fixed in the inner cavity of the guide hole, a magnet block one is fixedly embedded in the middle of the limiting crosspiece, and a magnet block two corresponding to the magnet block one is fixedly embedded in the inner wall of one end of the limiting sliding groove, so that the cutting blade can be reset.

[0014] Preferably, the inner side wall of the rotating ring is fixedly provided with an arc-shaped plate out of position with the worm gear teeth, the outer side of the arc-shaped plate is provided with a support frame, the surface of the support frame is in close contact with the inner side wall of the rotating ring, the surface of the support frame is provided with an arc-shaped groove, the arc-shaped plate is located in the inner cavity of the arc-shaped groove and is in sliding connection with the same, so that the rotating ring can be positioned.

[0015] Preferably, the arc-shaped plate is provided with two arc-shaped plates, and the two arc-shaped plates are centrally symmetrically distributed around the center of the rotating ring, the two ends of the arc-shaped plate are both fixedly provided with a boss, and the lower end of the support frame is fixedly provided on the vertical adjusting seat, so that the rotation of the rotating ring can be limited.

[0016] Preferably, the side surface of the lifting shaft is provided with a notched groove at the lower end, the strip-shaped tooth is provided in the middle of the notched groove, the notched groove corresponds to the spiral tooth, the two ends of the rotating shaft on the transmission wheel are both provided with an axle seat, and the axle seat is fixed on the vertical adjusting seat, so that the lifting shaft and the spiral tooth are prevented from interfering with each other.

[0017] Preferably, the vertical adjusting seat is provided with a lifting seat above, the lower surface of the lifting seat is fixedly provided with an annular cover, the annular cover is buckled on the outer side of the dust cover body from top to bottom, the inner side wall of the annular cover is in close contact with the outer side wall of the dust cover body, and the side wall of the annular cover is provided with an insertion slot corresponding to the cutting blade, so that the side wall of the dust cover body is prevented from being extruded outward by the cutting blade.

[0018] Preferably, the lifting seat is installed on the external frame and is driven to move by the oil cylinder on the frame, the lifting shaft is movably penetrated through the middle part of the lifting seat, and the lifting shaft is driven to move by the air cylinder installed on the upper side of the lifting seat, and the up-down movement of the annular cover and the lifting shaft can be controlled.

[0019] Preferably, the transmission wheel is arranged in the shape of a wine barrel with the middle diameter being greater than the diameters of the two ends, the generatrix of the transmission wheel is arc-shaped and concentric with the rotating ring, and the spiral teeth are distributed in the two end regions of the transmission wheel and are staggered with the annular tooth groove, so that the disengagement between the spiral teeth and the worm gear teeth is avoided.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] The present application is characterized in that the rotating ring is rotatably installed on the upper surface of the vertical adjusting seat, the dust cover body is buckled on the outer side of the rotating ring from top to bottom, the fixed ring is arranged between the dust cover body and the rotating ring, the plurality of cutting blades arranged in an annular array are slidably installed on the side wall of the fixed ring and slide along the radial direction of the fixed ring, the wedge-shaped protrusions corresponding to the cutting blades are fixed on the side wall of the rotating ring, and when the rotating ring rotates, the plurality of cutting blades can be driven to slide outward at the same time and extrude and cut the side wall of the dust cover body from the inner side of the dust cover body. During the cutting process, the annular cover is blocked on the outer side wall of the dust cover body, so that the deformation of the side wall of the dust cover body can be avoided. The device can form a plurality of grooves on the side wall of the dust cover body at one time during operation, has high working efficiency, and the sizes of the formed grooves are uniform and consistent. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic view of the dust cover body structure in the prior art;

[0023] Figure 2 It is a three-dimensional schematic view of the overall structure of the present application;

[0024] Figure 3 It is a cutting schematic view of the dust cover body structure of the present application;

[0025] Figure 4 It is a three-dimensional schematic view of the rotating ring and the fixed ring structure of the present application;

[0026] Figure 5 It is an exploded schematic view of the bottom ring and the top ring structure of the present application;

[0027] Figure 6 It is a partial three-dimensional schematic view of the bottom ring structure of the present application;

[0028] Figure 7 It is a three-dimensional schematic view of the bottom ring structure of the present application; Figure 6 It is a sectional view of the bottom ring structure of the present application along A-A;

[0029] Figure 8 is a perspective view of the cutting blade and the blade holder structure of the present application;

[0030] Figure 9 is a separated view of the rotating ring and the support frame structure of the present application;

[0031] Figure 10 is a perspective view of the transmission wheel structure of the present application;

[0032] Figure 11 is a perspective view of the lifting shaft structure of the present application.

[0033] In the figure: 1, horizontal adjusting seat; 2, vertical adjusting seat; 3, dust cover body; 4, rotating ring; 41, wedge-shaped protrusion; 42, arc-shaped plate; 43, support frame; 431, arc-shaped groove; 44, worm gear tooth; 5, fixed ring; 51, bottom ring; 52, top ring; 53, guide hole; 531, stepped groove; 532, limiting crosspiece; 533, magnet block one; 54, avoiding groove; 6, cutting blade; 61, blade holder; 611, pressure roller; 612, limiting sliding groove; 613, magnet block two; 7, transmission wheel; 71, annular tooth groove; 72, helical tooth; 73, shaft seat; 8, lifting seat; 81, annular cover; 82, lifting shaft; 821, notched groove; 822, strip-shaped tooth. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme of the present application clear and complete, and the advantages more clear and obvious, the embodiments of the present application are further described in detail below in combination with the drawings. It should be understood that the specific embodiments described here are part of the embodiments of the present application, not all the embodiments, and are only used to explain the embodiments of the present application, and do not limit the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] Please refer to Figures 1 to 11 , the present application provides a technical scheme:

[0036] Embodiment one, a pre-cutting structure for machining of motor dust cover assembly, comprising: horizontal adjusting seat 1.

[0037] Specifically, a height-adjustable vertical adjustment seat 2 is installed on the horizontal adjustment seat 1. Studs are movably installed through the four corners of the vertical adjustment seat 2. The lower end of the studs is fixed to the horizontal adjustment seat 1. Nuts are installed on the studs. The height of the vertical adjustment seat 2 can be adjusted by rotating the nuts. A rotatable rotating ring 4 is installed on the upper surface of the vertical adjustment seat 2. The rotating ring 4 can only rotate but will not shift its position. A dust cover body 3 is placed outside the rotating ring 4. The dust cover body 3 is a cylindrical structure with an opening at the lower end, so that it can be fastened to the outside of the rotating ring 4 from top to bottom. A fixing ring 5 is provided between the rotating ring 4 and the dust cover body 3, and the fixing ring 5 is fixedly connected to the upper surface of the vertical adjustment seat 2.

[0038] Furthermore, multiple cutting blades 6 arranged in a circular array are provided on the side wall of the fixing ring 5. The cutting blades 6 slide along the radial direction of the fixing ring 5. The dust cover body 3 is placed on the upper surface of the vertical adjustment seat 2 under the action of gravity. When the cutting blades 6 slide along the radial direction of the fixing ring 5, the tips of the cutting blades 6 can squeeze and cut the inner wall of the dust cover body 3 from the inside to form a groove, and as... Figure 8 As shown, the cutting blade 6 has a "<" shaped tip. As the moving distance of the cutting blade 6 increases, the cutting blade 6 can cut a longer slot on the side wall of the dust cover body 3. On the outer side wall of the rotating ring 4, there are wedge-shaped protrusions 41 that correspond one-to-one with the multiple cutting blades 6. The inclined surface of the wedge-shaped protrusions 41 presses and drives the cutting blades 6 to slide. When the rotating ring 4 rotates, the multiple wedge-shaped protrusions 41 rotate and move accordingly. The inclined surface of the wedge-shaped protrusions 41 can apply a pushing force to the cutting blades 6, so that the multiple cutting blades 6 can move away from the center of the fixed ring 5 along the radial direction of the fixed ring 5. Thus, multiple slots are formed on the side wall of the dust cover body 3 at one time. Since the moving distance of each cutting blade 6 is the same, the size of the multiple slots formed on the side wall of the dust cover body 3 can remain uniform.

[0039] Secondly, a worm gear tooth 44 is fixed on the inner wall of the rotating ring 4, such as... Figure 9 As shown, the worm gear teeth 44 do not cover the entire inner wall of the rotating ring 4. The central angle covered by the worm gear teeth 44 on the rotating ring 4 is 10-20 degrees. A transmission wheel 7 is rotatably installed in the inner cavity of the rotating ring 4. The transmission wheel 7 is close to the worm gear teeth 44. The surface of the transmission wheel 7 is fixed with helical teeth 72 that mesh with the worm gear teeth 44. When the transmission wheel 7 rotates, the helical teeth 72 mesh with the worm gear teeth 44, thereby driving the rotating ring 4 to rotate slowly. Since the diameter of the transmission wheel 7 is small and the transmission wheel 7 is located far from the center of the rotating ring 4, the transmission wheel 7 drives the rotating ring 4 to rotate more effortlessly. An annular tooth groove 71 is provided in the middle of the surface of the transmission wheel 7.

[0040] And, the dust cover body 3 is installed at the end of the motor, and the shaft hole at the center of the dust cover body 3 is in correspondence with the rotating shaft on the motor, and the lifting shaft 82 is movably arranged in the inner cavity of the shaft hole, the lifting shaft 82 can move up and down in the vertical direction, and the strip-shaped teeth 822 on the side wall of the lifting shaft 82 are in correspondence with the ring-shaped tooth groove 71, when the lifting shaft 82 moves up and down, the strip-shaped teeth 822 can drive the transmission wheel 7 to rotate through the mutual engagement between the strip-shaped teeth 822 and the ring-shaped tooth groove 71.

[0041] When the device is used, the staff manually or the mechanical arm automatically places the dust cover body 3 on the vertical adjusting seat 2, and the dust cover body 3 is buckled from top to bottom on the outside of the rotating ring 4 and the fixed ring 5, then the lifting shaft 82 moves down and passes through the shaft hole at the center of the dust cover body 3, as the lifting shaft 82 moves down, the strip-shaped teeth 822 contact the ring-shaped tooth groove 71 and drive the transmission wheel 7 to rotate, when the transmission wheel 7 rotates, the helical teeth 72 drive the rotating ring 4 to rotate through the mutual engagement between the helical teeth 72 and the worm gear teeth 44, and then drive the wedge-shaped protrusion 41 to rotate and move.

[0042] When the wedge-shaped protrusion 41 rotates and moves, the inclined surface of the wedge-shaped protrusion 41 pushes the cutting blade 6 to move along the radial direction of the fixed ring 5 and away from the center of the fixed ring 5, since multiple cutting blades 6 move synchronously, multiple cutting blades 6 can simultaneously contact the inner side wall of the dust cover body 3, then multiple cutting blades 6 simultaneously extrude and cut the inner side wall of the dust cover body 3 to form grooves, and as the moving distance of the cutting blade 6 increases, the size of the grooves formed on the side wall of the dust cover body 3 can increase accordingly.

[0043] In order to install the cutting blade 6, the fixed ring 5 of the present application includes a bottom ring 51 and a top ring 52, and the two are fixedly connected by bolts, the bottom ring 51 is welded and fixed with the vertical adjusting seat 2, the top ring 52 can be detached from the bottom ring 51, a guide hole 53 is arranged through the side wall of the fixed ring 5 along the radial direction thereof, a blade holder 61 is fixedly connected outside the cutting blade 6 by bolts, and the blade holder 61 is located in the inner cavity of the guide hole 53 and is in sliding connection with the guide hole 53, as shown in Figure 6 It can be seen that the guide hole 53 is mainly used for guiding the movement of the blade holder 61, so as to guide the movement of the cutting blade 6, and when the cutting blade 6 needs to be replaced due to damage, the connecting bolts between the cutting blade 6 and the blade holder 61 can be separately detached.

[0044] In order to limit the rotation and movement of the wedge-shaped protrusion 41, a pressure roller 611 is rotatably installed at one end of the blade holder 61, and the pressure roller 611 is in mutual adhesion with the inclined surface of the wedge-shaped protrusion 41, in combination with Figure 7 and Figure 6As shown, the pressure roller 611 is mainly used to reduce the friction between the inclined surface of the wedge-shaped protrusion 41 and the end of the blade holder 61, so that the wedge-shaped protrusion 41 can drive the blade holder 61 to slide more easily. The inner side wall of the fixed ring 5 is provided with a corresponding avoiding slot 54 for the wedge-shaped protrusion 41, which is used to avoid the normal movement of the wedge-shaped protrusion 41 being hindered, and can also limit the movement of the wedge-shaped protrusion 41 to prevent the wedge-shaped protrusion 41 from moving beyond the blade holder 61 and causing dislocation and separation. The inner side wall of the guide hole 53 is provided with a stepped slot 531, and the other end of the blade holder 61 and the cutting blade 6 are located in the inner cavity of the stepped slot 531 and slide, as shown in Figure 8 and Figure 7 As shown, the blade holder 61 is in the shape of a horizontal "T" letter, and the height of the cutting blade 6 is greater than that of the blade holder 61. Therefore, the stepped slot 531 can avoid the movement interference between the blade holder 61 and the cutting blade 6 and the fixed ring 5.

[0045] In order to reset the cutting blade 6, a limiting sliding groove 612 is provided in the middle of the blade holder 61. The inner cavity of the limiting sliding groove 612 is provided with a limiting ledge 532, and the limiting ledge 532 is fixed in the inner cavity of the guide hole 53. The limiting ledge 532 and the limiting sliding groove 612 cooperate to limit the sliding of the blade holder 61 and the cutting blade 6. A magnet block one 533 is fixedly embedded in the middle of the limiting ledge 532, and a magnet block two 613 corresponding to the magnet block one 533 is fixedly embedded in the inner wall of one end of the limiting sliding groove 612. When the wedge-shaped protrusion 41 moves and presses the blade holder 61 to move, the magnet block two 613 and the magnet block one 533 approach each other, and at this time, repulsion is generated between them. When the wedge-shaped protrusion 41 moves reversely to reset, the repulsion between the magnet block one 533 and the magnet block two 613 can drive the blade holder 61 to move reversely, thereby achieving the reset of the movement of the cutting blade 6 and the blade holder 61.

[0046] In order to position the rotating ring 4, an arc-shaped plate 42 is fixed on the inner side wall of the rotating ring 4 and is offset from the worm gear teeth 44. The outer side of the arc-shaped plate 42 is provided with a support frame 43, the surface of the support frame 43 abuts against the inner side wall of the rotating ring 4, and the surface of the support frame 43 is provided with an arc-shaped slot 431. The arc-shaped plate 42 is located in the inner cavity of the arc-shaped slot 431 and is connected in sliding manner, as shown in Figure 9 As shown, the support frame 43 and the arc-shaped plate 42 cooperate to position the rotating ring 4, so that the rotating ring 4 can only rotate around its center and cannot be offset. The rotating angle of the rotating ring 4 is small, and the worm gear teeth 44 will not interfere with the support frame 43 during rotation.

[0047] In order to limit the rotation of the rotating ring 4, the arc-shaped plate 42 of the application is provided with two arc-shaped plates 42 which are centrally symmetrically distributed around the center of the rotating ring 4, and the two arc-shaped plates 42 and the two supporting frames 43 cooperate with each other to avoid the tilting of the rotating ring 4, thereby further ensuring the stability of the position of the rotating ring 4. The two ends of the arc-shaped plate 42 are fixed with bosses, which are used to prevent the arc-shaped plate 42 from being separated from the supporting frame 43 during the rotation of the rotating ring 4, thereby limiting the rotation angle of the rotating ring 4. The lower end of the supporting frame 43 is fixed to the vertical adjusting seat 2 by bolts, and the overall height of the supporting frame 43 is greater than that of the rotating ring 4. After the supporting frame 43 is fixed to the vertical adjusting seat 2, the rotating ring 4 can be suspended, thereby reducing the frictional force acting on the rotating ring 4 during rotation. In addition, according to actual needs, rolling bodies or lubricating grease can be provided at the contact position between the arc-shaped plate 42 and the supporting frame 43 to further reduce the frictional resistance acting on the rotating ring 4 during rotation.

[0048] In order to avoid the movement interference between the lifting shaft 82 and the helical teeth 72, the application further has a notch groove 821 formed at the lower end of the side surface of the lifting shaft 82, and a strip-shaped tooth 822 is arranged at the middle part of the notch groove 821. The notch groove 821 corresponds to the helical teeth 72, and the notch groove 821 is mainly used to avoid the movement interference between the lifting shaft 82 and the helical teeth 72 on the outer side of the transmission wheel 7 during movement. The two ends of the rotating shaft on the transmission wheel 7 are provided with shaft seats 73, and the shaft seats 73 are fixed to the vertical adjusting seat 2. The shaft seats 73 are mainly used to position the transmission wheel 7, and ensure that the transmission wheel 7 is always engaged with the worm gear teeth 44. In addition, since the rotation angle of the rotating ring 4 is limited, the worm gear teeth 44 will not be completely separated from the helical teeth 72.

[0049] In order to avoid the outward bulging of the side wall of the dust cover body 3 when it is pressed by the cutting blade 6, the application further has a lifting seat 8 arranged above the vertical adjusting seat 2. The lower surface of the lifting seat 8 is fixed with an annular cover 81 which is buckled from top to bottom on the outer side of the dust cover body 3, and the inner side wall of the annular cover 81 is in contact with the outer side wall of the dust cover body 3. The lifting seat 8 can be lifted to move the annular cover 81 up and down, thereby positioning the side wall of the dust cover body 3 to avoid deformation and bulging of the side wall of the dust cover body 3 when the cutting blade 6 presses and cuts the side wall of the dust cover body 3. A slot corresponding to the cutting blade 6 is formed in the side wall of the annular cover 81. After the cutting blade 6 passes through the side wall of the dust cover body 3, the cutting blade 6 can be inserted into the slot of the annular cover 81, thereby avoiding the movement interference between the cutting blade 6 and the annular cover 81.

[0050] In order to control the up and down movement of the annular cover 81 and the lifting shaft 82, the lifting seat 8 of the application is installed on the external rack and is driven to move by the oil cylinder on the rack, as shown in Figure 2As shown, the horizontal adjusting seat 1 and the vertical adjusting seat 2 are placed on the workbench, the horizontal position of the horizontal adjusting seat 1 can be adjusted, and after adjustment, it is positioned by the fastener known in the prior art, the lifting seat 8 can move up and down through the control of the external oil cylinder, so that the annular cover 81 can move down to be attached to the upper surface of the vertical adjusting seat 2, and the lifting shaft 82 moves through the middle part of the lifting seat 8, and the lifting shaft 82 is driven to move by the cylinder installed on the upper side of the lifting seat 8, after the annular cover 81 is attached to the upper surface of the vertical adjusting seat 2, the lifting shaft 82 can be moved down alone by the cylinder control, and then the cutting blade 6 realizes the cutting of the side wall of the dust cover body 3, and then the lifting shaft 82 is first moved up, the cutting blade 6 is automatically reset, and then the lifting seat 8 drives the annular cover 81 to move up, so that the annular cover 81 can avoid the movement interference with the cutting blade 6 when moving up.

[0051] In order to avoid the disengagement between the helical teeth 72 and the worm gear teeth 44, the transmission wheel 7 is provided in a wine barrel shape with the middle diameter being larger than the two end diameters, the generatrix of the transmission wheel 7 is arc-shaped and is concentric with the rotating ring 4, as shown in Figure 4 and Figure 10 As shown, the axis of the rotating ring 4 and the axis of the transmission wheel 7 are perpendicular to each other, the transmission wheel 7 is provided in a wine barrel shape, so that the transmission wheel 7 can be as close as possible to the inner wall of the rotating ring 4, thereby avoiding the disengagement between the helical teeth 72 and the worm gear teeth 44 to the maximum extent, and the helical teeth 72 are distributed in the two end regions of the transmission wheel 7 and are staggered with the annular tooth groove 71, so that the strip-shaped teeth 822 on the lifting shaft 82 can avoid the collision with the helical teeth 72 when moving down.

[0052] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pre-cut structure for processing of a motor dust cover assembly, characterized by: The utility model relates to a horizontal adjusting seat (1) is installed with liftable vertical adjusting seat (2) on, the upper surface of vertical adjusting seat (2) is provided with rotatable rotating ring (4), the outside of rotating ring (4) places dust cover body (3), is provided with fixed ring (5) between rotating ring (4) and dust cover body (3), and fixed ring (5) is fixedly connected with the upper surface of vertical adjusting seat (2). The side wall of fixed ring (5) is provided with a plurality of cutting blades (6) arranged in an annular array, the cutting blades (6) slide along the radial direction of the fixed ring (5), the outer side wall of the rotating ring (4) is fixed with a wedge-shaped protrusion (41) corresponding to the plurality of cutting blades (6), and the inclined surface of the wedge-shaped protrusion (41) extrudes and drives the cutting blades (6) to slide. The inner side wall of the rotating ring (4) is fixed with a worm gear tooth (44), the inner cavity of the rotating ring (4) is rotatably installed with a transmission wheel (7), the surface of the transmission wheel (7) is fixed with a spiral tooth (72) meshing with the worm gear tooth (44), and the middle part of the surface of the transmission wheel (7) is provided with an annular tooth groove (71). The center of the dust cover body (3) is provided with an axle hole, the inner cavity of the axle hole is movably penetrated by a lifting shaft (82), and the side wall of the lifting shaft (82) is provided with a strip-shaped tooth (822) corresponding to the annular tooth groove (71). The fixed ring (5) includes a bottom ring (51) and a top ring (52), and the two are fixedly connected by bolts, the side wall of the fixed ring (5) is penetrated by a guide hole (53) along the radial direction thereof, the outer side of the cutting blade (6) is fixedly connected with a blade holder (61) by a bolt, and the blade holder (61) is located in the inner cavity of the guide hole (53) and is slidably connected therewith.

2. A pre-cut structure for processing of a motor dust cover assembly according to claim 1, characterized in that: One end of the blade holder (61) is rotatably installed with a pressure roller (611), the pressure roller (611) is in close contact with the inclined surface of the wedge-shaped protrusion (41), the inner side wall of the fixed ring (5) is provided with an avoidance groove (54) corresponding to the wedge-shaped protrusion (41), the inner side wall of the guide hole (53) is provided with a stepped groove (531), and the other end of the blade holder (61) and the cutting blade (6) are both located in the inner cavity of the stepped groove (531) and slide therein.

3. A pre-cut structure for processing of a motor dust cover assembly according to claim 2, characterized in that: The middle part of the blade holder (61) is penetrated by a limiting sliding groove (612), the inner cavity of the limiting sliding groove (612) is penetrated by a limiting ledge (532), the limiting ledge (532) is fixed in the inner cavity of the guide hole (53), the middle part of the limiting ledge (532) is fixedly embedded with a magnet block one (533), and the inner wall of one end of the limiting sliding groove (612) is fixedly embedded with a magnet block two (613) corresponding to the magnet block one (533).

4. A pre-cut structure for processing of a motor dust cover assembly according to claim 3, characterized in that: ​ 5. A pre-cut structure for processing of a motor dust cover assembly according to claim 4, characterized in that: The inner side wall of the rotating ring (4) is fixed with an arc-shaped plate (42) staggered with the worm gear teeth (44), the outer side of the arc-shaped plate (42) is provided with a support frame (43), the surface of the support frame (43) is attached to the inner side wall of the rotating ring (4), and the surface of the support frame (43) is provided with an arc-shaped groove (431), and the arc-shaped plate (42) is located in the inner cavity of the arc-shaped groove (431) and is in sliding connection with the arc-shaped groove (431).

6. A pre-cut structure for processing of a motor dust cover assembly according to claim 5, characterized in that: The arc-shaped plate (42) is provided with two arc-shaped plates (42) which are centrally symmetrically distributed around the center of the rotating ring (4), and the two ends of the arc-shaped plate (42) are fixed with bosses, and the lower end of the support frame (43) is fixed on the vertical adjusting seat (2) by bolts.

7. A pre-cut structure for processing of a motor dust cover assembly according to claim 6, characterized in that: The side surface of the lifting shaft (82) is provided with a notch groove (821), the strip-shaped tooth (822) is arranged in the middle of the notch groove (821), the notch groove (821) corresponds to the spiral tooth (72), and the two ends of the rotating shaft of the transmission wheel (7) are provided with shaft seats (73) and the shaft seats (73) are fixed on the vertical adjusting seat (2).

8. A pre-cut structure for processing of a motor dust cover assembly according to claim 7, characterized in that: The upper side of the vertical adjusting seat (2) is provided with a lifting seat (8), the lower surface of the lifting seat (8) is fixed with an annular cover (81), the annular cover (81) is buckled from top to bottom on the outer side of the dust cover body (3), and the inner side wall of the annular cover (81) is attached to the outer side wall of the dust cover body (3), and the side wall of the annular cover (81) is provided with an insertion slot corresponding to the cutting blade (6).

9. A pre-cut structure for processing of a motor dust cover assembly according to claim 8, characterized in that: The lifting seat (8) is installed on the external rack and is driven to move by the oil cylinder on the rack, the lifting shaft (82) is movably penetrated through the middle part of the lifting seat (8), and the lifting shaft (82) is driven to move by the cylinder installed on the upper side of the lifting seat (8).

10. A pre-cut structure for processing of a motor dust cover assembly according to claim 9, characterized in that: The transmission wheel (7) is arranged in a wine barrel shape with a larger diameter in the middle than at both ends, the generatrix of the transmission wheel (7) is arc-shaped and concentric with the rotating ring (4), the spiral teeth (72) are distributed in the two end regions of the transmission wheel (7) and are staggered with the annular tooth groove (71).

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