Vertical machining center

Abstract

The vertical machining center belongs to the technical field of vertical machining centers and comprises a machining body, a driving cavity is formed in the lower side of the interior of the machining body, a machining end is arranged above the rear side of the inner wall of the machining body, and a machining base is arranged at the position, under the machining end, of the lower side of the inner wall of the machining body. A driving assembly used for driving is arranged on the lower side of the inner wall of the driving cavity, the driving assembly comprises a fixed groove drum fixedly installed on the lower side of the inner wall of the driving cavity, a power groove is formed in the top face of the fixed groove drum, and a pushing groove drum is rotatably installed on the top face of the fixed groove drum. According to the utility model, chippings can be prevented from being clamped at the connecting position of the workpiece, the product positioning accuracy is ensured, the problem of deviation of the machining size is avoided, the scrap iron cleaned in time can avoid the problems that the surface of the workpiece is scratched and burrs are generated when the scrap iron is drawn into a cutting area, and the quality of the surface of the machined product is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vertical machining center, in particular to a vertical machining center. BACKGROUND

[0002] Vertical machining center is also called vertical numerical control machine tool, it is one of the core equipment of realizing high efficiency, precision, automation in modern manufacturing industry, since vertical machining center can process workpiece into the required shape, vertical machining center belongs to one of the common devices in the field of metal processing machinery manufacturing.

[0003] In the process of machining products in the vertical machining center, machining chips are generated, and the generated chips have no cleaning effect in the traditional vertical machining center, so that the generated chips may be stuck in the connection position of the workpiece, causing the deviation of the positioning of the machining product, causing the deviation of the machining size, and the iron chips without timely cleaning may be rolled into the cutting area, which may scratch the surface of the workpiece, produce burrs, and reduce the quality of the surface of the machining product.

[0004] In order to solve the above problems, we propose a vertical machining center. SUMMARY

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: a vertical machining center, comprising a machining main body, a driving cavity is formed in the lower side of the machining main body, a machining end head is arranged on the upper side of the rear side of the inner wall of the machining main body, a machining base is arranged on the lower side of the inner wall of the machining main body and located directly below the machining end head, and a driving assembly for driving is arranged on the lower side of the inner wall of the driving cavity. The driving assembly comprises a fixed groove cylinder fixedly installed on the lower side of the inner wall of the driving cavity, a power groove is formed in the top surface of the fixed groove cylinder, and a pushing groove cylinder is rotatably installed on the top surface of the fixed groove cylinder, an electric telescopic rod is fixedly installed inside the fixed groove cylinder and located below the inner wall of the driving cavity, a wire shell is fixedly installed on the output end of the electric telescopic rod, a lifting vertical rod is rotatably installed on the top surface of the wire shell, a cleaning assembly for cleaning chips is arranged on the upper side of the surface of the lifting vertical rod, and a power assembly for driving the lifting vertical rod is arranged inside the power groove.

[0006] Further, the cleaning assembly comprises a connecting disc sleeved on the upper side of the surface of the lifting vertical rod, a connecting cavity is formed in one side of the inner wall of the connecting disc, a telescopic cylinder is embedded in the lower side of the inner wall of the connecting cavity, a limiting ring is fixedly installed on the surface of the telescopic cylinder, a spring is sleeved on the cylinder wall of the telescopic cylinder and located below the limiting ring, three limiting blocks are fixedly installed on the circumferential side of the cylinder wall of the telescopic cylinder and located below the limiting ring, a limiting vertical opening is formed in one side of the inner wall of the connecting cavity and located below the three limiting blocks, a first plug is fixedly installed on the bottom surface of the telescopic cylinder, and a second plug matched with the first plug is arranged on the lower side of the first plug.

[0007] The combination of the first and second plug-in joints forms an unfolding adsorption cleaning effect, and when the trapezoidal curved surface units are combined, the adsorption of the debris is released, thereby ensuring better cleaning of the debris.

[0008] Further, the top surface of the connecting disc is rotatably provided with connecting rods, the top surface of the connecting rod is rotatably provided with trapezoidal curved surface units, the inside of the trapezoidal curved surface unit is fixedly provided with two combination plates on the upper side of the connecting rod, and the opposite surfaces of the combination plate are rotatably provided with positioning blocks.

[0009] The setting of the electromagnet can scrape off part of the debris in the product, more importantly, it can collect the debris by magnetic absorption, ensure the concentrated collection of the debris, and at the same time of collecting the debris, ensure the processing quality of the product by the driving structure of the device.

[0010] Further, the surfaces of the three limiting blocks extend to the surface of the lifting vertical rod through the corresponding limiting vertical openings, and the surfaces of the three limiting blocks are fixedly connected with the inner wall of the limiting block. The second plug-in joint is arranged in the inside of the lifting vertical rod, the surfaces of the plurality of trapezoidal curved surface units are sequentially connected to form a circular table structure, and the bottom surface of the positioning block is fixedly connected with the upper end of the lifting vertical rod.

[0011] The rotation combination of the positioning block and the combination plate can ensure that the trapezoidal curved surface unit is smoothly rotated and unfolded. The connection between the connecting rod, the connecting disc and the trapezoidal curved surface unit adopts a rotatable connecting piece combination, which can ensure that the connecting rod is smoothly pulled during the movement of the connecting disc, and can ensure the smooth use of the whole device.

[0012] Further, the power assembly comprises an output motor fixedly installed on the lower side of the inner wall of the power groove, and an inner tooth ring fixedly installed on the bottom surface of the pushing groove cylinder. The output shaft of the output motor is fixedly provided with a power gear, and the output end of the output motor is rotatably provided with a reinforcing frame. The inner wall of the inner tooth ring is meshingly connected with a transmission gear on the side away from the output motor.

[0013] Further, the surface of the power gear is meshingly connected with the inner wall of the inner tooth ring, the bottom surface of the reinforcing frame is fixedly connected with the lower side of the inner wall of the power groove, and the inner wall of the transmission gear is fixedly connected with the rod wall of the lifting vertical rod.

[0014] Further, the top surface of the pushing groove cylinder extends to the inside of the processing main body, and the top surface of the pushing groove cylinder is fixedly connected with the bottom surface of the processing base. The lifting vertical rod axially extends to the inside of the pushing groove cylinder through the fixed groove cylinder and the pushing groove cylinder.

[0015] Further, a plurality of rotating balls are rotatably provided on the top surface of the connecting disc, and the plurality of rotating balls are equidistantly distributed on the periphery of the top surface of the connecting disc.

[0016] Further, the thickness of the inner tooth ring is greater than the thickness of the transmission gear.

[0017] Further, the lower side of the pushing groove cylinder is fixedly provided with a guide inclined round block, a guide outlet is formed in the inner wall of the pushing groove cylinder on one side of the guide inclined round block, a cleaning port is formed in the rear side of the inner wall of the driving cavity, and a protective cover is connected to the rear side of the inner wall of the cleaning port.

[0018] Compared with the prior art, the vertical machining center has the following beneficial effects: 1. The driving structure inside the device has the function of cleaning debris, which can avoid the debris from being stuck in the connection position of the workpiece, ensure the accuracy of product positioning, avoid the deviation problem of machining size, and avoid the problem of scratching the surface of the workpiece and generating burrs when the iron chips are rolled into the cutting area.

[0019] 2. The device uses the setting of the electromagnet, which can not only scrape off part of the debris in the product, but also collect the debris by magnetic absorption, ensuring the centralized collection of debris. Thus, the driving structure of the device not only drives the operation of the structure, but also collects the debris.

[0020] 3. The device uses the rotation combination of the positioning block and the combination plate to ensure that the trapezoidal curved surface unit is smoothly unfolded. The connection between the connecting rod, the connecting disc and the trapezoidal curved surface unit adopts a rotatable connecting piece combination, which can ensure that the connecting rod is smoothly pulled during the movement of the connecting disc.

[0021] 4. The device forms an unfolding and adsorbing cleaning effect through the combination of the first plug and the second plug, and when the trapezoidal curved surface unit is combined, the adsorption of debris is released, thereby ensuring better cleaning of the debris. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a perspective view of the whole device; Figure 2 It is a perspective view of the whole device; Figure 3 It is a vertical section perspective view of the pushing groove cylinder; Figure 4 It is a vertical section perspective view of the inner tooth ring; Figure 5 It is a vertical section perspective view of the lifting vertical rod; Figure 6 It is Figure 5 It is an enlarged structure diagram of the middle A part; Figure 7 It is an unfolded perspective view of the trapezoidal curved surface unit; Figure 8It is a vertical section perspective view of the trapezoidal curved surface unit of the present application. Figure 9 It is a perspective view of the transmission gear of the present application.

[0023] In the figure: 1, processing main body; 2, driving cavity; 3, processing end head; 4, processing base; 5, driving assembly; 6, fixed groove cylinder; 7, power groove; 8, pushing groove cylinder; 9, electric telescopic rod; 10, wire shell; 11, lifting vertical rod; 12, cleaning assembly; 1201, connecting disc; 12011, rotating ball; 1202, connecting cavity; 1203, telescopic cylinder; 1204, limiting ring; 1205, spring; 1206, limiting block; 1207, limiting vertical port; 1208, first plug; 1209, second plug; 1210, connecting rod; 1211, trapezoidal curved surface unit; 1212, electromagnet; 1213, combination plate; 1214, positioning block; 13, power assembly; 1301, output motor; 1302, inner tooth ring; 1303, power gear; 1304, reinforcing frame; 1305, transmission gear; 14, guide inclined circular block; 15, guide outlet; 16, cleaning port; 17, protective cover. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0025] Please refer to Figures 1 to 9 A vertical machining center in the embodiment includes a processing main body 1, a driving cavity 2 is formed in the lower side of the inside of the processing main body 1, a processing end head 3 is arranged on the upper side of the rear side of the inner wall of the processing main body 1, a processing base 4 is arranged on the lower side of the inner wall of the processing main body 1 and located directly below the processing end head 3, and a driving assembly 5 for driving is arranged on the lower side of the inner wall of the driving cavity 2. The driving assembly 5 comprises a fixed groove cylinder 6 fixedly installed on the lower side of the inner wall of the driving cavity 2, the top surface of the fixed groove cylinder 6 is provided with a power groove 7, and the top surface of the fixed groove cylinder 6 is rotatably installed with a pushing groove cylinder 8. An electric telescopic rod 9 is fixedly installed inside the fixed groove cylinder 6 below the inner wall of the driving cavity 2, and the electric telescopic rod 9 is arranged at the center of the fixed groove cylinder 6, so that the connecting structure can be in a concentric state during rotation, avoiding affecting the normal rotation of the lifting vertical rod 11. The output end of the electric telescopic rod 9 is fixedly installed with a wire shell 10, the top surface of the wire shell 10 is rotatably installed with a lifting vertical rod 11, and the surface of the lifting vertical rod 11 is provided with a cleaning assembly 12 for cleaning debris. The cleaning assembly 12 comprises a connecting disc 1201 sleeved on the upper side of the surface of the lifting vertical rod 11, and a connecting cavity 1202 is formed in one side of the connecting disc 1201 inside the lifting vertical rod 11. A telescopic cylinder 1203 is embedded in the lower side of the inner wall of the connecting cavity 1202, a limiting ring 1204 is fixedly installed on the surface of the telescopic cylinder 1203, and a spring 1205 is sleeved on the lower side of the cylinder wall of the telescopic cylinder 1203; The cylinder wall of the telescopic cylinder 1203 is fixedly installed with three limiting blocks 1206 on the circumferential side of the limiting ring 1204, a limiting vertical opening 1207 is formed in one side of the inner wall of the connecting cavity 1202, a first plug 1208 is fixedly installed on the bottom surface of the telescopic cylinder 1203, a second plug 1209 is arranged on the lower side of the first plug 1208, a plurality of connecting rods 1210 are rotatably installed on the top surface of the connecting disc 1201, trapezoidal curved surface units 1211 are rotatably installed on the top surface of the connecting rods 1210, electromagnets 1212 are arranged in the trapezoidal curved surface units 1211, two combination plates 1213 are fixedly installed on the upper side of the connecting rods 1210 inside the trapezoidal curved surface units 1211, and positioning blocks 1214 are rotatably installed on the opposite surfaces of the combination plates 1213. The surfaces of the three limiting blocks 1206 respectively extend to the surface of the lifting vertical rod 11 through the corresponding limiting vertical openings 1207, and the surfaces of the three limiting blocks 1206 are fixedly connected with the inner wall of the limiting block 1206. The second plug 1209 is arranged inside the lifting vertical rod 11, the surfaces of the plurality of trapezoidal curved surface units 1211 are sequentially connected to form a circular table structure, and the bottom surface of the positioning block 1214 is fixedly connected with the upper end of the lifting vertical rod 11; The electric telescopic rod 9 is in a retracted state, the lifting vertical rod 11 is at the lowest point, the spring 1205 is in an unfolded state, and the connecting disc 1201 is pushed to the direction close to the positioning block 1214. At this time, the connecting rod 1210 is relatively inclined, the trapezoidal curved surface unit 1211 is folded around the lifting vertical rod 11, and avoids the machining area. When cleaning is needed, the electric telescopic rod 9 pushes the wire shell 10 and the lifting vertical rod 11 upwards, the lifting vertical rod 11 drives the positioning block 1214 at the top thereof to rise, and since the connecting disc 1201 is limited by the machining base 4 and cannot rise along with the lifting vertical rod 11, relative movement occurs between the connecting disc 1201 and the positioning block 1214, which is converted into a downward pulling force through the connecting rod 1210, so that the trapezoidal curved surface unit 1211 is forced to open outward around the hinge point thereof and the positioning block 1214, forming an unfolded cleaning surface to ensure cleaning of the debris. The power groove 7 is internally provided with a power assembly 13 for driving the lifting vertical rod 11. The power assembly 13 comprises an output motor 1301 fixedly installed on the lower side of the inner wall of the power groove 7. The bottom surface of the push groove cylinder 8 is fixedly provided with an internal gear ring 1302. The output shaft of the output motor 1301 is fixedly provided with a power gear 1303. The output end of the output motor 1301 is rotatably provided with a reinforcing frame 1304. The inner wall of the internal gear ring 1302 is meshingly connected with a transmission gear 1305 away from the output motor 1301. The surface of the power gear 1303 is meshingly connected with the inner wall of the internal gear ring 1302. The bottom surface of the reinforcing frame 1304 is fixedly connected with the lower side of the inner wall of the power groove 7. The inner wall of the transmission gear 1305 is fixedly connected with the rod wall of the lifting vertical rod 11. The transmission gear 1305 of the present application has a large gear pitch distance, which can ensure the centering of the lifting vertical rod 11 and also has a deceleration effect, thereby ensuring the quality of cleaning debris.

[0026] The top surface of the push groove cylinder 8 extends through to the inside of the machining main body 1, and the top surface of the push groove cylinder 8 is fixedly connected with the bottom surface of the machining base 4. The lifting vertical rod 11 extends axially through the fixed groove cylinder 6 and the push groove cylinder 8 to the inside of the push groove cylinder 8. A plurality of rotating balls 12011 are rotatably installed on the top surface of the connecting disc 1201, and the plurality of rotating balls 12011 are equidistantly distributed on the circumferential side of the top surface of the connecting disc 1201. The thickness of the internal gear ring 1302 is greater than the thickness of the transmission gear 1305. A guide inclined circular block 14 is fixedly installed on the lower side in the push groove cylinder 8. A guide outlet 15 is formed in the inner wall of the push groove cylinder 8 on one side of the guide inclined circular block 14. A cleaning port 16 is formed in the rear side of the inner wall of the driving cavity 2. A protective cover 17 is clamped on the rear side of the inner wall of the cleaning port 16.

[0027] The working principle of the above embodiment is as follows: In the processing state, the electric telescopic rod 9 is in the retracted state, the lifting vertical rod 11 and the cleaning assembly 12 are located at the lower position inside the pushing groove cylinder 8, and the cleaning assembly 12 is in the retracted state, at this time, the trapezoidal curved surface unit 1211 is gathered, and does not interfere with the normal processing of the workpiece by the processing end 3, when the processing is completed or in the processing process, the debris needs to be cleaned; The electric telescopic rod 9 is elongated, the pushing wire shell 10, the lifting vertical rod 11 and the cleaning assembly 12 are moved upwards, the cleaning assembly 12 protrudes from the surface of the processing base 4 and approaches the workpiece, in this process, the connecting disc 1201 is pressed, the spring 1205 is compressed, and the cleaning assembly 12 maintains a certain contact pressure, at the same time that the cleaning assembly 12 moves upwards, under the transmission of the output motor 1301, the power gear 1303, the inner tooth ring 1302 and the transmission gear 1305, the cleaning assembly 12 is in a state of continuous rotation, because the transmission gear 1305 is engaged with the inner tooth ring 1302, and the transmission gear 1305 is fixed on the lifting vertical rod 11, therefore, when the pushing groove cylinder 8 rotates, the lifting vertical rod 11 and the cleaning assembly 12 will counter-rotate; The lifting vertical rod 11 drives the cleaning assembly 12 to rotate in the rotating process, and under the pushing of the electric telescopic rod 9, the cleaning assembly 12 can move up and down, and the lifting vertical rod 11 moves up and down, because the thickness of the transmission gear 1305 is less than the thickness of the inner tooth ring 1302, so even if it moves up and down, it will not affect the normal rotation transmission, and in the process of moving upwards, the connecting disc 1201 will be limited with the surface of the processing base 4, so that the connecting disc 1201 will keep the position of the connecting disc 1201 with the processing base 4 unchanged during the up and down movement of the lifting vertical rod 11; When the connecting disc 1201 is fixed, the trapezoidal curved surface unit 1211 will be expanded by the connecting rod 1210, so as to better approach the debris generated in the processing, but the expanded trapezoidal curved surface unit 1211 will not affect the normal processing of the processing end 3 and will not contact the processing end 3, when the connecting disc 1201 moves downwards relative to the lifting vertical rod 11, the first plug 1208 and the second plug 1209 will be inserted with each other, so as to ensure the electrification of the electromagnet 1212, so that the debris can be adsorbed by the magnetic attraction, the product processed by the application is a metal that can be adsorbed, and the magnetic attraction generated only collects the debris and does not affect the processing stability of the product, because the magnetic force is small; When adsorbing for a period of time, this can be adjusted by setting the telescopic time of the electric telescopic rod 9, which is a mature technology. The lifting vertical rod 11 moves downward, so the connecting disc 1201 moves downward, thereby collecting the debris into the pushing groove cylinder 8, and under the action of centrifugal force and the guide outlet 15, the debris is guided into the driving cavity 2, thereby facilitating the later cleaning. During the downward movement, the spring 1205 pushes the connecting disc 1201 to move upward, so the first plug 1208 and the second plug 1209 are separated, thereby the magnetic attraction disappears, the debris falls down, and a small amount of debris in the trapezoidal curved surface unit 1211 does not affect the later cleaning problem. The connecting line of the electromagnet 1212 passes through the telescopic cylinder 1203 and is led out through the wire shell 10, which does not cause the winding problem of the wire body.

[0028] The installation, connection or setting method disclosed in the embodiment is a common mechanical connection method, as long as the beneficial effects can be achieved, and can be implemented. In addition, the electrical elements appearing in the embodiment are electrically connected with the master controller and the power supply. The master controller can be a conventional known device such as a computer that plays a control role. A person skilled in the art can control the electrical elements through simple programming, and the existing disclosed power connection technology also belongs to the common knowledge in the art. Therefore, the specific structure, composition and working principle of the embodiment will not be described in detail.

Claims

1. A vertical machining center, comprising a machining body (1), characterized in that: The processing body (1) has a drive cavity (2) on the lower side inside, and a processing end (3) is provided on the upper side of the rear side of the inner wall of the processing body (1). A processing base (4) is provided on the lower side of the inner wall of the processing body (1) directly below the processing end (3). A drive assembly (5) for driving is provided on the lower side of the inner wall of the drive cavity (2). The drive assembly (5) includes a fixed groove cylinder (6) fixedly installed on the lower side of the inner wall of the drive cavity (2). The top surface of the fixed groove cylinder (6) is provided with a power groove (7), and the top surface of the fixed groove cylinder (6) is rotatably installed with a push groove cylinder (8). The lower part of the inner wall of the drive cavity (2) is fixedly installed inside the fixed groove cylinder (6), and the output end of the electric telescopic rod (9) is fixedly installed with a wire shell (10). The top surface of the wire shell (10) is rotatably installed with a lifting vertical rod (11), and the upper side of the surface of the lifting vertical rod (11) is provided with a cleaning assembly (12) for cleaning debris. The inside of the power groove (7) is provided with a power assembly (13) for driving the lifting vertical rod (11).

2. A vertical machining center according to claim 1, characterized in that: The cleaning assembly (12) includes a connecting plate (1201) sleeved on the upper side of the surface of the lifting rod (11), and a connecting cavity (1202) is provided inside the lifting rod (11) on one side of the connecting plate (1201). A telescopic cylinder (1203) is embedded in the lower side of the inner wall of the connecting cavity (1202). A limiting ring (1204) is fixedly installed on the surface of the telescopic cylinder (1203), and the cylinder wall of the telescopic cylinder (1203) is sleeved on the lower side of the limiting ring (1204). A spring (1205) is connected to the telescopic cylinder (1203). Three limiting blocks (1206) are fixedly installed on the cylinder wall of the telescopic cylinder (1203) around the limiting ring (1204). A limiting vertical opening (1207) is opened on one side of the three limiting blocks (1206) on the inner wall of the connecting cavity (1202). A first plug (1208) is fixedly installed on the bottom surface of the telescopic cylinder (1203), and a matching second plug (1209) is provided on the lower side of the first plug (1208).

3. A vertical machining center according to claim 2, characterized in that: The top surface of the connecting plate (1201) is rotatably mounted with several connecting rods (1210), and the top surface of the connecting rods (1210) is rotatably mounted with a trapezoidal curved surface unit (1211). The trapezoidal curved surface unit (1211) is equipped with an electromagnet (1212). Inside the trapezoidal curved surface unit (1211), two combined plates (1213) are fixedly mounted on the upper side of the connecting rods (1210), and positioning blocks (1214) are rotatably mounted on the opposite sides of the combined plates (1213).

4. A vertical machining center according to claim 3, characterized in that: The surfaces of the three limiting blocks (1206) extend to the surface of the lifting rod (11) through the corresponding limiting vertical openings (1207), and the surfaces of the three limiting blocks (1206) are fixedly connected to the inner wall of the limiting block (1206). The second plug (1209) is located inside the lifting rod (11). The surfaces of several trapezoidal curved surface units (1211) are connected in sequence to form a frustum structure. The bottom surface of the positioning block (1214) is fixedly connected to the upper end of the lifting rod (11).

5. A vertical machining center according to claim 1, characterized in that: The power assembly (13) includes an output motor (1301) fixedly installed on the lower side of the inner wall of the power groove (7), and an internal gear ring (1302) fixedly installed on the bottom surface of the push groove (8). The output shaft of the output motor (1301) is fixedly installed with a power gear (1303), and a reinforcing frame (1304) is rotatably installed on the output end of the output motor (1301). A transmission gear (1305) is meshed on the side of the inner wall of the internal gear ring (1302) away from the output motor (1301).

6. A vertical machining center according to claim 5, characterized in that: The surface of the power gear (1303) meshes with the inner wall of the internal gear ring (1302), the bottom surface of the reinforcing frame (1304) is fixedly connected to the lower side of the inner wall of the power groove (7), and the inner wall of the transmission gear (1305) is fixedly connected to the rod wall of the lifting rod (11).

7. A vertical machining center according to claim 1, characterized in that: The top surface of the push groove (8) extends through to the interior of the processing body (1), and the top surface of the push groove (8) is fixedly connected to the bottom surface of the processing base (4). The lifting rod (11) axially penetrates the fixed groove (6), and the push groove (8) extends upward to the interior of the push groove (8).

8. A vertical machining center according to claim 2, characterized in that: A number of rotating balls (12011) are rotatably mounted on the periphery of the top surface of the connecting disk (1201), and the number of rotating balls (12011) are equidistantly distributed on the periphery of the top surface of the connecting disk (1201).

9. A vertical machining center according to claim 5, characterized in that: The thickness of the internal gear ring (1302) is greater than the thickness of the transmission gear (1305).

10. A vertical machining center according to claim 1, characterized in that: A guide oblique round block (14) is fixedly installed on the lower side inside the push groove (8), and an outlet (15) is opened on the inner wall of the push groove (8) on one side of the guide oblique round block (14). A cleaning port (16) is opened on the rear side of the inner wall of the drive cavity (2), and a protective cover (17) is snapped onto the rear side of the inner wall of the cleaning port (16).

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