CN219337358U - Dynamic and static pressure grinding head - Google Patents
Dynamic and static pressure grinding head Download PDFInfo
- Publication number
- CN219337358U CN219337358U CN202320636233.5U CN202320636233U CN219337358U CN 219337358 U CN219337358 U CN 219337358U CN 202320636233 U CN202320636233 U CN 202320636233U CN 219337358 U CN219337358 U CN 219337358U
- Authority
- CN
- China
- Prior art keywords
- grinding wheel
- grinding head
- grinding
- main shaft
- box body
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Abstract
The utility model discloses a dynamic and static pressure grinding head which comprises a grinding head box body, a motor, a main shaft and a grinding wheel, wherein one end of the main shaft extends out from the end, far away from the motor, of the grinding head box body and is connected with the grinding wheel through a grinding wheel chuck; the rotating shaft of the motor is connected with the end part of the main shaft through an expanding sleeve type plum coupling, the end, close to the motor, of the main shaft is in rotary connection with the grinding head box body through an angular contact bearing and a rear bearing seat, the two ends of the angular contact bearing are provided with main shaft bearing covers, the end, far away from the motor, of the grinding head box body is connected with the main shaft through a shaft sleeve and a sleeve, and the opposite outer end of the shaft sleeve is provided with a main shaft front cover; the outside of the grinding wheel is provided with a grinding wheel housing, the lower part of the grinding wheel housing is provided with a water retaining cover, the grinding wheel housing is provided with a connecting block, the connecting block is connected with a water spray pipe, the lower end of the water spray pipe is provided with a nozzle, and the opposite outer sides of the grinding wheel housing are provided with cover doors. The utility model has the advantages of good working stability of the main shaft, guaranteed grinding smoothness, good durability, improved grinding quality and efficiency, good sealing performance of the front end and the rear end of the main shaft and difficult damage.
Description
Technical Field
The utility model relates to the field of grinding heads, in particular to a dynamic and static pressure grinding head.
Background
The mechanical industry is the basic industry for the development of national economy in China, and the development of each industry in the national economy depends on the mechanical industry to provide equipment for the mechanical industry. The grinding machining application is relatively wide, and the method is one of the main methods for precisely machining machine parts. The surface grinder is mainly used for precisely grinding the end face of the part. The existing surface grinder has poor stability of the main shaft after the main shaft is assembled, circular runout is easy to occur in the long-term working process, the grinding smoothness cannot be ensured, the connection coaxiality of the main shaft and the main shaft of the motor is poor, the durability is poor, the grinding quality and the efficiency are low, the tightness of the front end and the rear end of the main shaft is poor, and the main shaft is easy to damage.
Disclosure of Invention
The utility model aims to overcome the defects of the technology and provide a dynamic and static pressure grinding head.
In order to solve the technical problems, the technical scheme provided by the utility model is that: the grinding head comprises a grinding head box body, a motor arranged at one end of the grinding head box body, a main shaft arranged in the grinding head box body and a grinding wheel, wherein one end of the main shaft extends out of the end, far away from the motor, of the grinding head box body and is connected with the grinding wheel through a grinding wheel chuck; the rotating shaft of the motor is connected with the end part of the main shaft through an expanding sleeve type plum coupling, the end, close to the motor, of the main shaft is in rotary connection with the grinding head box body through an angular contact bearing and a rear bearing seat, the two ends of the angular contact bearing are provided with main shaft bearing covers, the end, far away from the motor, of the grinding head box body is connected with the main shaft through shaft sleeves and sleeves, the two sleeves are arranged symmetrically, the opposite outer ends of the shaft sleeves are provided with main shaft front covers, and a framework oil seal is arranged between the main shaft front covers and the main shaft; the grinding wheel is characterized in that a grinding wheel housing is arranged outside the grinding wheel, the grinding wheel housing is fixedly connected with a grinding wheel box body, the lower end of the grinding wheel housing is not provided with a bottom cover, the lower portion of the grinding wheel housing is provided with a water retaining cover, the grinding wheel housing is provided with a connecting block, the connecting block is connected with a water spraying pipe, the lower end of the water spraying pipe is provided with a nozzle, the opposite outer side of the grinding wheel housing is provided with a cover door, one end of the cover door is rotatably connected with the grinding wheel housing through a hinge, and a locking device is arranged between the other end of the cover door and the grinding wheel housing.
Further, a grinding head bracket is connected to the end, close to the motor, of the grinding head box body.
Further, the upper side of the grinding head box body is fixedly connected with a rack through a screw and is used for being connected with an external transmission mechanism to realize transmission.
Further, the rear bearing seat is fixedly connected with the grinding head box body through a bolt, the main shaft bearing cover is fixedly connected with the rear bearing seat through a bolt, the shaft sleeve is fixedly connected with the grinding head box body through a bolt, and the opposite outer end of the sleeve extends out of the shaft sleeve and is fixedly connected with the shaft sleeve through a bolt.
Further, the jack that link up from top to bottom is equipped with on the connecting block, the spray pipe passes through jack and connecting block sliding connection, be equipped with pentagon handle on the connecting block, the body of rod and the connecting block threaded connection of pentagon handle and body of rod tip and spray pipe contact, the spray pipe upper end is equipped with right-angle joint, be equipped with the ball valve on the spray pipe.
Further, a combined travel switch is arranged at the rear side of the grinding head box body.
Further, the water retaining cover is connected with an adjusting bolt, the grinding wheel cover is provided with a strip-shaped groove matched with the rod body of the adjusting bolt, and the adjusting bolt can slide relative to the strip-shaped groove.
Further, the outside of the cover door is connected with a warning board through rivets.
Further, the grinding wheel chuck comprises a resisting section, an installation section, a clamping section and a front end connecting section, the grinding wheel is installed on the installation section, the clamping section of the grinding wheel chuck is provided with a balance disc, so that the connecting part of the grinding wheel is positioned between the balance disc and the resisting section, soft steel paper boards are arranged between the connecting part of the grinding wheel and the balance disc and between the connecting part of the grinding wheel and the resisting section, the balance disc is fixedly connected with the grinding wheel chuck through bolts, a groove is formed in the balance disc, a balance block is arranged in the groove, the balance block is fixedly connected with the balance disc through bolts, and the front end connecting section of the grinding wheel chuck is fixedly connected with a main shaft through a grinding wheel locking nut.
Compared with the prior art, the utility model has the advantages that: the spindle and the motor shaft after the dynamic and static pressure spindle is assembled are high in coaxiality, and the spindle is connected with the grinding head box body stably and reliably, so that the spindle is good in working stability, the grinding finish is guaranteed, the durability is good, the grinding quality and efficiency are improved, the front end and the rear end of the spindle are good in tightness, difficult to damage, long in service life, reasonable in structural design and convenient to produce and assemble.
Drawings
FIG. 1 is a schematic cross-sectional view of a dynamic and static pressure grinding head according to the utility model.
Fig. 2 is a schematic perspective view 1 of a dynamic and static pressure grinding head according to the utility model.
Fig. 3 is a schematic perspective view 2 of a dynamic and static pressure grinding head according to the utility model.
Fig. 4 is a top view of a dynamic and static pressure grinding head of the present utility model.
Fig. 5 is a front view of a dynamic and static pressure grinding head of the present utility model.
Fig. 6 is a right side view of a dynamic and static pressure grinding head of the present utility model.
Fig. 7 is a left side view of a dynamic and static pressure grinding head of the present utility model.
Fig. 8 is an enlarged schematic view of the structure at a of fig. 1.
As shown in the figure:
1. the grinding head box body, 2, a motor, 3, a main shaft, 4, a grinding wheel, 5, a grinding wheel chuck, 6, an expanding sleeve type plum coupling, 7, an angular contact bearing, 8, a rear bearing seat, 9, a main shaft bearing cover, 10, a shaft sleeve, 11, a sleeve, 12, a main shaft front cover, 13, a framework oil seal, 14, a grinding wheel housing, 15, a water retaining cover, 16, a connecting block, 17, a water spraying pipe, 18, a nozzle, 19, a cover door, 20, a hinge, 21, a locking device, 22, a grinding head support, 23, a rack, 24, a pentagonal handle, 25, a right-angle joint, 26, a ball valve, 27, a combined travel switch, 28, an adjusting bolt, 29, a bar-shaped groove, 30, a warning sign, 31, a balance disc, 32, a balance block, 33 and a grinding wheel locking nut.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Embodiment 1, with reference to fig. 1-8, a dynamic and static pressure grinding head comprises a grinding head box body 1, a motor 2 arranged at one end of the grinding head box body 1, a main shaft 3 arranged in the grinding head box body 1, and a grinding wheel 4, wherein one end of the main shaft 3 extends out from the end, far away from the motor 2, of the grinding head box body 1 and is connected with the grinding wheel 4 through a grinding wheel chuck 5; the spindle of the motor 2 is connected with the end part of the spindle 3 through an expanding sleeve type plum coupling 6, the spindle 3 is driven to rotate through the rotation of the motor 2, the spindle 3 drives the grinding wheel 4 to rotate, grinding work is achieved, the end, close to the motor 2, of the spindle 3 is connected with the grinding head box 1 in a rotating mode through an angular contact bearing 7 and a rear bearing seat 8, spindle bearing covers 9 are arranged at two ends of the angular contact bearing 7, the end, far away from the motor 2, of the grinding head box 1 is connected with the spindle 3 through a shaft sleeve 10 and a sleeve 11, the two sleeves 11 are symmetrically arranged, 2 sleeves 11 are symmetrically arranged, a spindle front cover 12 is arranged at the opposite outer end of the shaft sleeve 10, and a framework oil seal 13 is arranged between the spindle front cover 12 and the spindle 3, so that the spindle 3 is stable and reliable when connected with the grinding head box 1, the coaxiality of the spindle 3 and the spindle of the motor 2 is guaranteed, meanwhile, the spindle 3 is small in rotation resistance and high in efficiency; the grinding wheel 4 is externally provided with a grinding wheel housing 14, the grinding wheel housing 14 is fixedly connected with the grinding wheel housing 1, the lower end of the grinding wheel housing 14 is not provided with a bottom cover, the lower part of the grinding wheel housing 14 is provided with a water retaining cover 15, the grinding wheel housing 14 is provided with a connecting block 16, the connecting block 16 is connected with a water spraying pipe 17, the lower end of the water spraying pipe 17 is provided with a nozzle 18, cooling liquid is sprayed out through the nozzle 18, the grinding quality and efficiency are guaranteed, the service life of the grinding wheel 4 is prolonged, the opposite outer sides of the grinding wheel housing 14 are provided with cover doors 19, one ends of the cover doors 19 are rotatably connected with the grinding wheel housing 14 through hinges 20, and locking devices 21 are arranged between the other ends of the cover doors 19 and the grinding wheel housing 14, so that the cover doors 19 can be conveniently and rapidly opened, and the grinding wheel 4 is convenient to install and replace.
In this embodiment, a grinding head bracket 22 is connected to the end of the grinding head box 1 near the motor 2, and is used for connecting the grinding head box 1 with a machine tool running mechanism.
In this embodiment, the upper side of the grinding head box 1 is fixedly connected with a rack 23 through a screw, and is used for being connected with an external transmission mechanism to realize movement, so as to drive the grinding wheel 4 to move.
In this embodiment, the rear bearing seat 8 is fixedly connected with the grinding head box 1 through a bolt, the main shaft bearing cover 9 is fixedly connected with the rear bearing seat 8 through a bolt, the shaft sleeve 10 is fixedly connected with the grinding head box 1 through a bolt, and the opposite outer end of the sleeve 11 extends out of the shaft sleeve 10 and is fixedly connected with the shaft sleeve 10 through a bolt.
In this embodiment, the jack that link up from top to bottom is equipped with on the connecting block 16, spray pipe 17 passes through jack and connecting block 16 sliding connection, be equipped with pentagon handle 24 on the connecting block 16, the body of rod and the connecting block 16 threaded connection of pentagon handle 24 and body of rod tip and spray pipe 17 contact, can adjust the elasticity that spray pipe 17 and connecting block 16 are connected through pentagon handle 24 to can adjust the height of nozzle 18, satisfy the operation requirement, spray pipe 17 upper end is equipped with right-angle joint 25 for connect the coolant liquid feed liquor pipe, be equipped with ball valve 26 on the spray pipe 17 for the opening and closing of coolant liquid and the regulation of flow.
In this embodiment, the rear side of the grinding head box 1 is provided with the combined travel switch 27, and when the grinding head box 1 walks to the limited position, the combined travel switch 27 is turned on, so that the grinding head box 1 stops to walk continuously, and the safe and reliable work is ensured.
In this embodiment, the water blocking cover 15 is connected with an adjusting bolt 28, the grinding wheel housing 14 is provided with a bar-shaped groove 29 matched with the rod body of the adjusting bolt 28, the adjusting bolt 28 can slide relative to the bar-shaped groove 29, the adjusting bolt 28 is unscrewed, the position of the grinding wheel housing 14 relative to the grinding wheel housing 14 can be adjusted, the use requirement is met, and the adjusting bolt 28 is screwed down after the adjustment is finished.
In this embodiment, the outside of the cover door 19 is connected with the warning board 30 by rivets, which can effectively play a role in warning safety operation.
In this embodiment, the grinding wheel chuck 5 includes the section of keeping out, installation section, clamp section and front end linkage segment, the grinding wheel 4 is installed at the installation section, balance disc 31 is installed to the clamp section of grinding wheel chuck 5 to make the connecting portion of grinding wheel 4 be located between balance disc 31 and the section of keeping out, all be equipped with the mild steel cardboard between the connecting portion of grinding wheel 4 and balance disc 31 and between the connecting portion of grinding wheel 4 and the section of keeping out, balance disc 31 links firmly through bolt and grinding wheel chuck 5, thereby makes grinding wheel 4 firm in connection, be equipped with the recess on the balance disc 31, be equipped with balancing piece 32 in the recess, balancing piece 32 links firmly through screw and balance disc 31 for adjust the focus of grinding wheel 4, guarantee processingquality and extension grinding wheel 4 life, the front end linkage segment of grinding wheel chuck 5 links firmly with main shaft 3 through grinding wheel lock nut 33.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, "plurality" means at least 2.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.
Claims (9)
1. The utility model provides a sound pressure bistrique which characterized in that: the grinding head comprises a grinding head box body (1), a motor (2) arranged at one end of the grinding head box body (1), a main shaft (3) arranged in the grinding head box body (1) and a grinding wheel (4), wherein one end of the main shaft (3) extends out of the end, far away from the motor (2), of the grinding head box body (1) and is connected with the grinding wheel (4) through a grinding wheel chuck (5);
the rotating shaft of the motor (2) is connected with the end part of the main shaft (3) through an expanding sleeve type plum coupling (6), the end, close to the motor (2), of the main shaft (3) is rotationally connected with the grinding head box body (1) through an angular contact bearing (7) and a rear bearing seat (8), two ends of the angular contact bearing (7) are provided with main shaft bearing covers (9), the end, far away from the motor (2), of the grinding head box body (1) is connected with the main shaft (3) through shaft sleeves (10) and sleeve pipes (11), the total number of the sleeve pipes (11) is two, 2 sleeve pipes (11) are symmetrically arranged, a main shaft front cover (12) is arranged at the opposite outer end of each shaft sleeve (10), and a framework oil seal (13) is arranged between each main shaft front cover (12) and each main shaft (3);
the grinding wheel (4) is externally provided with a grinding wheel cover (14), the grinding wheel cover (14) is fixedly connected with a grinding head box body (1), the lower end of the grinding wheel cover (14) is not provided with a bottom cover, the lower part of the grinding wheel cover (14) is provided with a water retaining cover (15), the grinding wheel cover (14) is provided with a connecting block (16), the connecting block (16) is connected with a water spraying pipe (17), the lower end of the water spraying pipe (17) is provided with a nozzle (18), the opposite outer side of the grinding wheel cover (14) is provided with a cover door (19), one end of the cover door (19) is rotationally connected with the grinding wheel cover (14) through a hinge (20), and a locking device (21) is arranged between the other end of the cover door (19) and the grinding wheel cover (14).
2. A dynamic and static pressure grinding head as claimed in claim 1, wherein: and a grinding head bracket (22) is connected to the end, close to the motor (2), of the grinding head box body (1).
3. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the upper side of the grinding head box body (1) is fixedly connected with a rack (23) through a screw and is used for being connected with an external transmission mechanism to realize transmission.
4. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the rear bearing seat (8) is fixedly connected with the grinding head box body (1) through a bolt, the main shaft bearing cover (9) is fixedly connected with the rear bearing seat (8) through a bolt, the shaft sleeve (10) is fixedly connected with the grinding head box body (1) through a bolt, and the opposite outer end of the sleeve (11) extends out of the shaft sleeve (10) and is fixedly connected with the shaft sleeve (10) through a bolt.
5. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the utility model discloses a spray pipe, including connecting block (16), spray pipe (17), connecting block (16), be equipped with jack that link up from top to bottom on connecting block (16), be equipped with pentagon handle (24) on connecting block (16), the body of rod and connecting block (16) threaded connection of pentagon handle (24) and body of rod tip and spray pipe (17) contact, spray pipe (17) upper end is equipped with right angle joint (25), be equipped with ball valve (26) on spray pipe (17).
6. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the rear side of the grinding head box body (1) is provided with a combined travel switch (27).
7. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the water retaining cover (15) is connected with an adjusting bolt (28), the grinding wheel housing (14) is provided with a strip-shaped groove (29) matched with the rod body of the adjusting bolt (28), and the adjusting bolt (28) can slide relative to the strip-shaped groove (29).
8. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the outside of the cover door (19) is connected with a warning board (30) through rivets.
9. A dynamic and static pressure grinding head as claimed in claim 1, wherein: the grinding wheel chuck (5) comprises a resisting section, an installation section, a clamping section and a front end connecting section, the grinding wheel (4) is installed on the installation section, the balance disc (31) is installed on the clamping section of the grinding wheel chuck (5), so that the connecting part of the grinding wheel (4) is located between the balance disc (31) and the resisting section, soft steel paper boards are arranged between the connecting part of the grinding wheel (4) and the balance disc (31) and between the connecting part of the grinding wheel (4) and the resisting section, the balance disc (31) is fixedly connected with the grinding wheel chuck (5) through bolts, a groove is formed in the balance disc (31), a balance block (32) is fixedly connected with the balance disc (31) through bolts, and the front end connecting section of the grinding wheel chuck (5) is fixedly connected with the spindle (3) through grinding wheel locking nuts (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320636233.5U CN219337358U (en) | 2023-03-28 | 2023-03-28 | Dynamic and static pressure grinding head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320636233.5U CN219337358U (en) | 2023-03-28 | 2023-03-28 | Dynamic and static pressure grinding head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219337358U true CN219337358U (en) | 2023-07-14 |
Family
ID=87098958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320636233.5U Active CN219337358U (en) | 2023-03-28 | 2023-03-28 | Dynamic and static pressure grinding head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219337358U (en) |
-
2023
- 2023-03-28 CN CN202320636233.5U patent/CN219337358U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219337358U (en) | Dynamic and static pressure grinding head | |
| CN117983879B (en) | Horizontal five-axis machining equipment for profile machining | |
| CN116551563A (en) | Dynamic and static pressure grinding head | |
| CN201231419Y (en) | Vertical and horizontal composite tool changing device | |
| CN114770216B (en) | Trace lubrication nozzle device with adjustable pose | |
| CN213135139U (en) | High-speed railway flange drilling machine | |
| CN206416010U (en) | A kind of lapping device of electric power valve site examining and repairing | |
| CN112846789B (en) | Angle-adjustable cutting device | |
| CN209394433U (en) | A kind of spray equipment of CNC machining center | |
| CN210890172U (en) | Novel deep sea gate valve | |
| CN209793364U (en) | Ball compensation location high accuracy full angle grinding device | |
| CN211760548U (en) | Abrasive belt grinding tool for robot | |
| CN208285118U (en) | A kind of motor bearings inside paper machine | |
| CN219818047U (en) | High-speed air bearing power head with high rotation precision | |
| CN221715655U (en) | Disc piece double-finish turning structure based on power turret | |
| CN201249379Y (en) | Irregular glass edging machine | |
| CN215698287U (en) | L-shaped nonstandard milling cutter for machining undercarriage parts | |
| CN210499087U (en) | Machine tool for online quick repair | |
| CN211924758U (en) | Special drive connecting device assembly for sprinkling irrigation equipment | |
| CN220353820U (en) | Road construction drilling equipment | |
| CN221639608U (en) | Grinding power head with lengthened inner hole | |
| CN213701885U (en) | Steel structural part drilling device | |
| CN217530207U (en) | Drilling machine for hardware processing with cooling function | |
| CN216279657U (en) | Stop valve with coupling assembling | |
| CN220217919U (en) | Grinder adjusting frame |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |