CN210232529U - Grinding device for computer shell structure - Google Patents

Grinding device for computer shell structure Download PDF

Info

Publication number
CN210232529U
CN210232529U CN202020066579.2U CN202020066579U CN210232529U CN 210232529 U CN210232529 U CN 210232529U CN 202020066579 U CN202020066579 U CN 202020066579U CN 210232529 U CN210232529 U CN 210232529U
Authority
CN
China
Prior art keywords
fixedly connected
shaft
shell
double
internal thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN202020066579.2U
Other languages
Chinese (zh)
Inventor
Rongzhi Jia
贾荣芝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yantai Engineering and Technology College
Original Assignee
Yantai Engineering and Technology College
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yantai Engineering and Technology College filed Critical Yantai Engineering and Technology College
Priority to CN202020066579.2U priority Critical patent/CN210232529U/en
Application granted granted Critical
Publication of CN210232529U publication Critical patent/CN210232529U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model discloses a be used for grinding device for computer shell structure, which comprises a housin, the inner wall fixedly connected with biax motor of casing, the bottom fixedly connected with axle one of output shaft on the biax motor, the bottom of axle one runs through casing and fixedly connected with abrasive disk, the top fixedly connected with axle two of output shaft on the biax motor, the top fixedly connected with carousel of axle two, be close to the last fixed surface at edge on the carousel and be connected with arc rack, the through-hole has all been seted up to the both sides of casing and has been rotated through the through-hole is spacing, the fixed surface of transmission shaft is connected with the gear of two symmetries. The utility model discloses, use through the cooperation between the above-mentioned structure, solved in the in-service use, because the wheel of polishing on the rotary rod can produce a large amount of pieces when polishing chassis exterior, the untimely clearance of piece can make operational environment receive the pollution, the problem of bringing inconvenience for the use.

Description

Grinding device for computer shell structure
Technical Field
The utility model relates to a grinding device technical field specifically is a be used for computer shell structure to use grinding device.
Background
The computer is commonly called as computer, is a modern electronic computing machine for high-speed computation, can perform numerical computation and logic computation, and also has the function of storage and memory. The intelligent electronic device is a modern intelligent electronic device which can operate according to a program and automatically process mass data at a high speed; in order to protect hardware equipment of a computer from dust, impact and the like, the hardware equipment of the computer is generally fixedly arranged in a shell of the computer; in the production process of a computer shell, polishing of the shell is one of indispensable steps when the computer shell is used, a user also needs to manually adjust polishing speed in the polishing process of a traditional polishing device, the practicability of the device main body is reduced, secondly, a fixed using method is adopted for a polishing placing platform, and the angle can be adjusted only by a polishing mechanical arm, so that the thinner computer shell is inconvenient to polish, thirdly, the polishing wheel is troublesome to mount and dismount, the practicability of the device main body is reduced, therefore, a polishing device is provided for the purpose, for example, the polishing device for the computer shell disclosed by Chinese patent CN208438141U comprises a device main body, a polishing mechanical arm and a polishing wheel, the polishing mechanical arm is movably connected to the top of a motor protective shell, and the polishing accuracy of polishing of the computer shell is improved, the stretching frame is used for stretching the movable placing plate to enable the device main body to reach the optimal polishing angle, and the movable clamp is used for fixing the computer shell to prevent the computer shell from deviating;
however, in the actual use process, because the grinding wheel on the rotating rod can generate a large amount of fragments when grinding the chassis shell, the untimely cleaning of the fragments can cause the working environment to be polluted, and the use is inconvenient.
Disclosure of Invention
An object of the utility model is to provide a be used for computer shell grinding device for structure improves traditional device, has solved the problem among the background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a be used for computer shell grinding device for structure, includes the casing, the inner wall fixedly connected with double-shaft motor of casing, the bottom fixedly connected with axle one of output shaft on the double-shaft motor, the bottom of axle one runs through casing and fixedly connected with polishing disc.
The top of the output shaft of the double-shaft motor is fixedly connected with a second shaft, the top of the second shaft is fixedly connected with a turntable, the upper surface of the turntable, which is close to the edge, is fixedly connected with an arc rack, both sides of the shell are respectively provided with a through hole, and a transmission shaft is rotated in a limiting way through the through hole, the surface of the transmission shaft is fixedly connected with two symmetrical gears, teeth on the gears are movably connected with teeth on the arc rack, both ends of the transmission shaft are respectively and fixedly connected with a screw rod, the surface of the screw rod is screwed with an internal thread sleeve, the side surface of the shell is fixedly connected with a limiting rod, the limiting rod penetrates through the internal thread sleeve and is in sliding connection with the internal thread sleeve, the bottom of the internal thread sleeve is fixedly connected with a connecting arm, the bottom of the connecting arm is fixedly connected with a negative pressure fan, the surface of the gas pipe penetrates through the semicircular pipe and is fixedly connected with the semicircular pipe, and the inner wall of the semicircular pipe is provided with an air inlet.
Preferably, the surface of the double-shaft motor is fixedly connected with a reinforcing frame, and one end of the reinforcing frame, far away from the double-shaft motor, is fixedly connected with the inner wall of the shell.
Preferably, the surface of the transmission shaft is fixedly connected with two limiting rings, and the opposite sides of the two limiting rings are respectively connected with the left side and the right side of the inner wall of the shell in a rotating manner.
Preferably, the number of the limiting rods is two, and the two limiting rods are symmetrically arranged along the horizontal central line of the screw rod.
Preferably, the side face of the connecting arm is fixedly connected with a damping spring, and one end, far away from the connecting arm, of the damping spring is fixedly connected with the side face of the shell.
Preferably, the air outlet of the negative pressure fan is fixedly connected with an air guide pipe, one end of the air guide pipe, far away from the negative pressure fan, is fixedly connected with a collecting box, and the side face of the collecting box is fixedly connected with the end part of the limiting rod.
Compared with the prior art, the beneficial effects of the utility model are as follows:
firstly, the utility model drives the whole shell to turn and move by polishing the connecting rod on the mechanical arm; when the double-shaft motor is used, after the double-shaft motor is powered on and the switch is turned on, the output shaft on the double-shaft motor drives the shaft I to synchronously rotate, the shaft drives the polishing disc to continuously rotate, and when the lower surface of the polishing disc in a rotating state is in contact with the surface of the case shell, the polishing operation is carried out on the case;
meanwhile, an output shaft on the double-shaft motor synchronizes the rotation of the second synchronous shaft, the second synchronous shaft drives the rotary table to synchronously rotate, after the rotary table rotates, the arc-shaped rack on the upper surface of the rotary table can alternately contact with teeth on the two gears, and after the teeth on the arc-shaped rack contact with the teeth on the gears, the arc-shaped rack is driven to rotate; when teeth on the arc-shaped rack are contacted with teeth on the two gears in sequence, the transmission shaft can rotate in opposite directions;
when the transmission shaft rotates, the transmission shaft can synchronously drive the screw rod on the transmission shaft to rotate, and the internal thread sleeve matched with the screw rod threads tends to synchronously rotate along with the screw rod; because of the limitation of the limiting rod, the internal thread sleeve can only move left and right on the limiting rod, so that relative rotation is generated between the screw rod and the internal thread sleeve, when the screw rod rotates continuously along with the transmission shaft, the internal thread sleeve can move horizontally on the screw rod, because the transmission shaft rotates in an intermittent reciprocating manner, the internal thread sleeve can move left and right on the surface of the screw rod in a reciprocating manner, the negative pressure fan can drive the semicircular pipe on the negative pressure fan to move left and right in a reciprocating manner through the gas pipe under the transmission of the connecting arm, negative pressure suction is generated after the negative pressure fan passes, so that the semicircular pipe can suck and collect scraps generated in the rotating and polishing process of the polishing disc through the gas inlet hole, and because the semicircular pipe still moves left and right in the process of recovering the scraps through the gas inlet hole, dynamic adsorption is realized, and the range of, the cleaning efficiency is improved.
Two, the utility model discloses a cooperation between the above-mentioned structure is used, has solved in the in-service use, because the wheel of polishing on the rotary rod when polishing chassis exterior shell, can produce a large amount of pieces, and the untimely clearance of piece can make operational environment receive the pollution, the problem of bringing inconvenience for the use.
Drawings
Fig. 1 is a front view of the structure of the present invention;
fig. 2 is a front sectional view of the housing of the present invention;
fig. 3 is a top view of the turntable of the present invention;
fig. 4 is a top view of the semicircular tube of the present invention.
In the figure: the device comprises a shell 1, a double-shaft motor 2, a first shaft 3, a polishing disc 4, a second shaft 5, a rotating disc 6, an arc-shaped rack 7, a transmission shaft 8, a gear 9, a screw rod 10, an internal thread sleeve 11, a limiting rod 12, a connecting arm 13, a negative pressure fan 14, a gas pipe 15, a semicircular pipe 16, a gas inlet 17, a reinforcing frame 18, a limiting ring 19, a damping spring 20, a gas guide pipe 21 and a collecting box 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: a polishing device for a computer shell structure comprises a shell 1, wherein a double-shaft motor 2 is fixedly connected to the inner wall of the shell 1, a reinforcing frame 18 is fixedly connected to the surface of the double-shaft motor 2, one end, far away from the double-shaft motor 2, of the reinforcing frame 18 is fixedly connected with the inner wall of the shell 1, the addition of the reinforcing frame 18 on the double-shaft motor 2 is improved, the firmness of the double-shaft motor 2 after installation work can be further improved, and shaking is reduced; the bottom of an output shaft on the double-shaft motor 2 is fixedly connected with a first shaft 3, the bottom of the first shaft 3 penetrates through the shell 1 and is fixedly connected with a polishing disc 4, and a connecting rod on a polishing mechanical arm drives the shell 1 to integrally turn and move; when the double-shaft motor is used, after the double-shaft motor 2 is powered on and the switch is turned on, the output shaft on the double-shaft motor drives the first shaft 3 to synchronously rotate, the first shaft 3 drives the polishing disc 4 to continuously rotate, and when the lower surface of the polishing disc 4 in a rotating state is in contact with the surface of the case shell, polishing operation is carried out on the case shell.
The top of an output shaft on the double-shaft motor 2 is fixedly connected with a second shaft 5, the top of the second shaft 5 is fixedly connected with a turntable 6, an arc-shaped rack 7 is fixedly connected to the upper surface, close to the edge, of the turntable 6, meanwhile, the output shaft on the double-shaft motor 2 synchronously drives the second shaft 5 to rotate, the second shaft 5 drives the turntable 6 to synchronously rotate, after the turntable 6 rotates, the arc-shaped rack 7 on the upper surface can alternately contact teeth on two gears 9, and after the teeth on the arc-shaped rack 7 contact the teeth on the gears 9, the arc-shaped rack 7 is driven to rotate by the arc-shaped rack 7; when teeth on the arc-shaped rack 7 are contacted with teeth on the two gears 9 in sequence, the transmission shaft 8 can rotate in the opposite direction; through holes are formed in the two sides of the shell 1, the transmission shaft 8 is in limiting rotation through the through holes, the surface of the transmission shaft 8 is fixedly connected with two limiting rings 19, the opposite sides of the two limiting rings 19 are respectively in rotating connection with the left side and the right side of the inner wall of the shell 1, and the stability of the limiting rotation of the transmission shaft 8 on the shell 1 can be further ensured through the arrangement of the two limiting rings 19 on the surface of the transmission shaft 8; the surface of the transmission shaft 8 is fixedly connected with two symmetrical gears 9, teeth on the gears 9 are movably connected with teeth on the arc-shaped rack 7, two ends of the transmission shaft 8 are fixedly connected with screw rods 10, the surface of each screw rod 10 is in threaded connection with an internal thread sleeve 11, when the transmission shaft 8 rotates, the screw rods 10 on the transmission shaft 10 can be synchronously driven to rotate, and the internal thread sleeves 11 in threaded fit with the screw rods 10 tend to synchronously rotate along with the internal thread sleeves; due to the limitation of the limiting rod 12, the internal thread sleeve 11 can only move left and right on the limiting rod 12, so that relative rotation is generated between the screw 10 and the internal thread sleeve 11, when the screw 10 continuously rotates along with the transmission shaft 8, the internal thread sleeve 11 can move on the screw 10 in the horizontal direction, and because the transmission shaft 8 intermittently rotates in a reciprocating manner, the internal thread sleeve 11 can move left and right on the surface of the screw 10 in a reciprocating manner; the side surface of the shell 1 is fixedly connected with two limiting rods 12, the number of the limiting rods 12 is two, the two limiting rods 12 are symmetrically arranged on the horizontal central line of the screw 10, and the stress of the internal thread sleeve 11 can be more balanced through the two limiting rods 12 corresponding to the internal thread sleeve 11, so that the internal thread sleeve 11 can move on the limiting rods 12 more stably; the limiting rod 12 penetrates through the internal thread sleeve 11 and is in sliding connection with the internal thread sleeve 11, the bottom of the internal thread sleeve 11 is fixedly connected with a connecting arm 13, the side face of the connecting arm 13 is fixedly connected with a damping spring 20, one end, far away from the connecting arm 13, of the damping spring 20 is fixedly connected with the side face of the shell 1, through the arrangement of the damping spring 20 on the connecting arm 13, fine vibration generated by the connecting arm 13 in the left-right movement process can be filtered and absorbed, and meanwhile, under the elastic force action of the damping spring 20, the threaded matching between the screw rod 10 and the internal thread sleeve 11 can be tighter; the bottom of the connecting arm 13 is fixedly connected with a negative pressure fan 14, the negative pressure fan 14 can drive the semicircular pipe 16 on the connecting arm to reciprocate left and right through the air delivery pipe 15 through transmission of the connecting arm 13, and negative pressure suction is generated after the negative pressure fan 14 passes, so that the semicircular pipe 16 sucks and collects debris generated in the rotary polishing process of the polishing disc 4 through the air inlet hole 17, and the semicircular pipe 16 moves left and right in the process of recovering the debris through the air inlet hole 17, so that dynamic adsorption is realized, the working area range can be further increased, and the cleaning efficiency is improved; an air outlet of the negative pressure fan 14 is fixedly connected with an air guide pipe 21, one end of the air guide pipe 21, which is far away from the negative pressure fan 14, is fixedly connected with a collection box 22, the side face of the collection box 22 is fixedly connected with the end part of the limiting rod 12, debris absorbed and collected by negative pressure of the negative pressure fan 14 enters the air guide pipe 21 and finally turns into the collection box 22, the debris in the collection box 22 is periodically subjected to centralized treatment, an air inlet of the bottom of the negative pressure fan 14 is fixedly connected with an air pipe 15, a semicircular pipe 16 is arranged below the negative pressure fan 14, two ends of the semicircular pipe 16 are sealed, the surface of the air pipe 15 penetrates through the semicircular pipe 16 and is fixedly connected with the semicircular pipe 16.
The working principle is as follows: when the polishing device for the computer shell structure is used, the connecting rod on the polishing mechanical arm drives the shell 1 to integrally turn and move; when the double-shaft motor is used, after the double-shaft motor 2 is powered on and the switch is turned on, the output shaft on the double-shaft motor drives the first shaft 3 to synchronously rotate, the first shaft 3 drives the polishing disc 4 to continuously rotate, and when the lower surface of the polishing disc 4 in a rotating state is in contact with the surface of the case shell, the polishing operation is carried out on the case; meanwhile, the output shaft on the double-shaft motor 2 synchronously drives the second shaft 5 to rotate, the second shaft 5 drives the turntable 6 to synchronously rotate, after the turntable 6 rotates, the arc-shaped rack 7 on the upper surface of the turntable can alternately contact with teeth on the two gears 9, and after the teeth on the arc-shaped rack 7 contact with the teeth on the gears 9, the turntable is driven by the arc-shaped rack 7 to rotate; when teeth on the arc-shaped rack 7 are contacted with teeth on the two gears 9 in sequence, the transmission shaft 8 can rotate in the opposite direction; when the transmission shaft 8 rotates, the screw rod 10 on the transmission shaft can be synchronously driven to rotate, and the internal thread sleeve 11 in threaded fit with the screw rod 10 tends to synchronously rotate along with the rotation; because of the limitation of the limiting rod 12, the internal thread sleeve 11 can only move left and right on the limiting rod 12, and further the relative rotation between the screw rod 10 and the internal thread sleeve 11 is generated, after the screw rod 10 continuously rotates along with the transmission shaft 8, the internal thread sleeve 11 can move horizontally on the screw rod 10, because the transmission shaft 8 performs intermittent reciprocating rotation, the internal thread sleeve 11 can perform left and right reciprocating movement on the surface of the screw rod 10, and the transmission is performed through the connecting arm 13, the negative pressure fan 14 can drive the semi-circular pipe 16 thereon to perform left and right reciprocating movement through the air pipe 15, and the negative pressure suction is generated after the negative pressure fan 14 passes, so that the semi-circular pipe 16 sucks and collects the scraps generated in the rotating and polishing process of the polishing disc 4 through the air inlet hole 17, and because the semi-circular pipe 16 also performs left and right movement in the process of recycling the scraps through the air inlet hole, dynamic adsorption is realized, so that the range of a working area can be increased, and the cleaning efficiency is improved; through the cooperation use between the above-mentioned structure, solved in the in-service use, because the wheel of polishing on the rotary rod when polishing machine case shell, can produce a large amount of pieces, the untimely clearance of piece can make operational environment receive the pollution, gives the problem that the use is inconvenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A grinding device for computer shell structure which characterized in that: the grinding device comprises a shell (1), wherein a double-shaft motor (2) is fixedly connected to the inner wall of the shell (1), a first shaft (3) is fixedly connected to the bottom of an output shaft on the double-shaft motor (2), and the bottom of the first shaft (3) penetrates through the shell (1) and is fixedly connected with a grinding disc (4);
the top of an output shaft on the double-shaft motor (2) is fixedly connected with a second shaft (5), the top of the second shaft (5) is fixedly connected with a turntable (6), the upper surface of the turntable (6) close to the edge is fixedly connected with an arc-shaped rack (7), both sides of the shell (1) are provided with through holes and are rotatably limited by the through holes to form a transmission shaft (8), the surface of the transmission shaft (8) is fixedly connected with two symmetrical gears (9), teeth on the gears (9) are movably connected with teeth on the arc-shaped rack (7), both ends of the transmission shaft (8) are fixedly connected with screw rods (10), the surface of each screw rod (10) is screwed with an internal thread sleeve (11), the side surface of the shell (1) is fixedly connected with a limiting rod (12), and the limiting rod (12) penetrates through the internal thread sleeve (11) and is slidably connected with the internal thread sleeve (11, the bottom fixedly connected with linking arm (13) of internal thread cover (11), the bottom fixedly connected with negative-pressure air fan (14) of linking arm (13), the air intake fixedly connected with gas-supply pipe (15) of negative-pressure air fan (14) bottom, the below of negative-pressure air fan (14) is equipped with semicircle pipe (16), the surface of gas-supply pipe (15) run through semicircle pipe (16) and with semicircle pipe (16) fixed connection, inlet port (17) have been seted up to the inner wall of semicircle pipe (16).
2. The grinding apparatus for a computer housing structure according to claim 1, wherein: the surface of the double-shaft motor (2) is fixedly connected with a reinforcing frame (18), and one end, far away from the double-shaft motor (2), of the reinforcing frame (18) is fixedly connected with the inner wall of the shell (1).
3. The grinding apparatus for a computer housing structure according to claim 1, wherein: the surface of the transmission shaft (8) is fixedly connected with two limiting rings (19), and the opposite sides of the two limiting rings (19) are respectively connected with the left side and the right side of the inner wall of the shell (1) in a rotating mode.
4. The grinding apparatus for a computer housing structure according to claim 1, wherein: the number of the limiting rods (12) is two, and the two limiting rods (12) are symmetrically arranged by the horizontal central line of the screw (10).
5. The grinding apparatus for a computer housing structure according to claim 1, wherein: the lateral surface of the connecting arm (13) is fixedly connected with a damping spring (20), and one end, far away from the connecting arm (13), of the damping spring (20) is fixedly connected with the lateral surface of the shell (1).
6. The grinding apparatus for a computer housing structure according to claim 1, wherein: the air outlet of the negative pressure fan (14) is fixedly connected with an air guide pipe (21), one end of the air guide pipe (21), which is far away from the negative pressure fan (14), is fixedly connected with a collection box (22), and the side surface of the collection box (22) is fixedly connected with the end part of the limiting rod (12).
CN202020066579.2U 2020-01-14 2020-01-14 Grinding device for computer shell structure Expired - Fee Related CN210232529U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020066579.2U CN210232529U (en) 2020-01-14 2020-01-14 Grinding device for computer shell structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020066579.2U CN210232529U (en) 2020-01-14 2020-01-14 Grinding device for computer shell structure

Publications (1)

Publication Number Publication Date
CN210232529U true CN210232529U (en) 2020-04-03

Family

ID=69966743

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020066579.2U Expired - Fee Related CN210232529U (en) 2020-01-14 2020-01-14 Grinding device for computer shell structure

Country Status (1)

Country Link
CN (1) CN210232529U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111761109A (en) * 2020-07-06 2020-10-13 南京宁源智能仪表有限公司 Water meter case opening inside and outside groove machining device
CN112872942A (en) * 2020-12-30 2021-06-01 台山市大江泰来工艺制品有限公司 Wooden chopstick production equipment capable of recycling waste materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111761109A (en) * 2020-07-06 2020-10-13 南京宁源智能仪表有限公司 Water meter case opening inside and outside groove machining device
CN111761109B (en) * 2020-07-06 2021-06-18 南京宁源智能仪表有限公司 Water meter case opening inside and outside groove machining device
CN112872942A (en) * 2020-12-30 2021-06-01 台山市大江泰来工艺制品有限公司 Wooden chopstick production equipment capable of recycling waste materials

Similar Documents

Publication Publication Date Title
CN210232529U (en) Grinding device for computer shell structure
CN211053409U (en) Plate polishing device
CN212043865U (en) Flat grinder convenient to location
CN210546580U (en) Dust removing device for computer shell
CN213034218U (en) Grinding device for machining of rotor of cutting machine
CN212190190U (en) Assembly line auxiliary device is used in solar energy component production
CN209936690U (en) Polisher collection grey structure
CN211388038U (en) Self-lubricating slide graphite grinds flat machinery
CN114211300A (en) Turning and polishing integrated machine for machining
CN214023882U (en) Gear grinding device with dust removal effect
CN211103255U (en) Horizontal automatic grinding machine
CN218613491U (en) Flat grinder with iron fillings are retrieved function
CN215357967U (en) Industrial mechanical device with dust removal function
CN220699210U (en) Automobile oil cylinder shell
CN220427042U (en) Anti-sputtering gear machining tool
CN219633340U (en) Edging device for screw processing
CN217943007U (en) Bearing fixing device for bearing internal machining grinding machine
CN219005596U (en) Polishing device
CN219212713U (en) Automatic dust-absorbing polishing machine
CN220740576U (en) Hardware product production workbench
CN217143314U (en) Grinding device for machining milling head
CN218133958U (en) Label carving dust removal device
CN219563342U (en) Dust removal and prevention device of engineering plastic plate engraving machine
CN218856384U (en) Grinding machine of flat belt pulley production usefulness
CN213003091U (en) Low-noise gear grinding machine for gear machining

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20200403

Termination date: 20210114

CF01 Termination of patent right due to non-payment of annual fee