CN208428046U - A kind of transmission shaft processing unit (plant) - Google Patents
A kind of transmission shaft processing unit (plant) Download PDFInfo
- Publication number
- CN208428046U CN208428046U CN201821127847.6U CN201821127847U CN208428046U CN 208428046 U CN208428046 U CN 208428046U CN 201821127847 U CN201821127847 U CN 201821127847U CN 208428046 U CN208428046 U CN 208428046U
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- CN
- China
- Prior art keywords
- workbench
- transmission shaft
- screw rod
- fixedly connected
- rack
- 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
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Abstract
The utility model relates to Machining of Shaft-type Parts fields, disclose a kind of transmission shaft processing unit (plant), including rack, the first workpiece polishing mechanism and the second workpiece polishing mechanism, workbench is fixedly connected in rack, workbench is equipped with limit plate, and polishing channel is formed between limit plate and workbench, limit plate is equipped with feed pipe, the lower end of feed pipe is fixedly connected with connecting plate, forms feed inlet between connecting plate and limit plate, is equipped with the feedboard for turning on or off feed inlet at feed inlet；The first screw rod and the second screw rod are threaded on workbench, the first screw rod and limit plate are rotatablely connected, and the second screw rod and connecting plate are rotatablely connected；Workbench is equipped with position-limit mechanism, and workbench is equipped with discharge port, and discharge outlet is equipped with discharging mechanism.The utility model can two axial ends to more transmission shafts carry out polishing work simultaneously, also accommodate different-diameter, different length transmission shaft polishing work, and the positioning of transmission shaft is convenient, is not necessarily to artificial clamping.
Description
Technical field
The utility model relates to Machining of Shaft-type Parts fields, and in particular to a kind of transmission shaft processing unit (plant).
Background technique
Transmission shaft is the axis that power can be transmitted in universal driving device.The rotary body that it is a high revolving speed, supports less,
It is the axis for the rotation of speed changer being passed to main reducing gear for the vehicle of preposition engine rear wheel drive, it can be several sections,
It can be connected by universal joint between section and section.
It needs to carry out the end face at both ends polishing deburring after every section transmission shaft processing, polishing is beaten including mechanical grinding, chemistry
Mill, electrolysis polishing, ultrasonic wave polishing, fluid polishing and magnetic grinding polishing, transmission shaft are polished using the method for mechanical grinding
When, existing shaft end grinding apparatus is once only capable of carrying out polishing work to a shaft end of an axis, and grinding efficiency is low, and
And polishing is forward and backward needs mutual disassembly's positioning mechanism, it is inconvenient.
Utility model content
The utility model is intended to provide a kind of transmission shaft processing unit (plant), can carry out both ends to more transmission shafts simultaneously
End face polishing work, improves grinding efficiency.
In order to achieve the above objectives, the utility model adopts the following technical solution: a kind of transmission shaft processing unit (plant), including machine
Frame, the first workpiece polishing mechanism and the second workpiece polishing mechanism are fixedly connected with workbench in rack, and the first workpiece polishing mechanism is fixedly connected on machine
On frame and be located at workbench rear side, the second workpiece polishing mechanism be slidably connected on the rack and be located at workbench front side, second dozen
The glide direction of grinding machine structure and the axis of transmission shaft are parallel；Workbench is equipped with limit plate parallel with it, limit plate and work
Polishing channel is formed between platform, the upper right side of limit plate is fixedly connected with feed pipe, and the lower end of feed pipe is equipped with feed inlet, charging
The bottom righthand side of pipe is fixedly connected with connecting plate, is equipped with the feedboard for turning on or off feed inlet at feed inlet；A left side for workbench
Portion is threaded with the first screw rod, and the first screw rod and limit plate are rotatablely connected, and the right part of workbench is threaded with the second screw rod,
Second screw rod and connecting plate are rotatablely connected；Workbench is equipped with the position restrainer for preventing transmission shaft transverse movement in polishing channel
Structure, workbench are equipped with discharge port, and discharge outlet is equipped with discharging mechanism.
The principle and advantage of this programme are: the first workpiece polishing mechanism and the second workpiece polishing mechanism are used to carry out the end face of transmission shaft
Polishing, two workpiece polishing mechanisms polish simultaneously to the both ends of transmission shaft, improve grinding efficiency.Second workpiece polishing mechanism is slidably connected at machine
On frame, from there through sliding the second workpiece polishing mechanism, the polishing work of the transmission shaft of achievable different length.Workbench is as transmission
The place of axis polishing, limit plate for preventing in bruting process, the upper and lower play of transmission shaft and influence grinding effect.It feeds effective
In placing transmission shaft to be polished, set feedboard at feed inlet, pull feedboard, open feed inlet can realize transmission shaft automatically from
It is expelled in feed pipe in the polishing channel between workbench and limit plate.Feedboard is pushed, feed inlet is closed, in bruting process
Transmission shaft in feed pipe does not enter back into polishing channel, and transmission shaft in bruting process will not be in play to feed pipe.The
One screw rod and the second screw rod are respectively used to adjust limit plate and the distance between connecting plate and workbench, to complete different-diameter biography
The shaft end polishing work of moving axis.Position-limit mechanism carries out located lateral to the transmission shaft in polishing channel, prevents transmission shaft from polishing
Transverse movement in channel, and influence grinding effect.The transmission shaft that discharging mechanism is used to make to complete to polish is discharged from discharge port.
When using the above scheme, the beneficial effects of the utility model are as follows:
(1) several transmission shafts can be achieved in polishing channel while carrying out end face polishing, grinding efficiency is high.
(2) first workpiece polishing mechanisms and the second workpiece polishing mechanism polish simultaneously to the end face of both ends of the drive shaft, further increase and beat
Efficiency is ground, transmission shaft rotation in bruting process makes polishing more evenly.
(3) transmission shaft is positioned by limit plate, reclaiming plate and position-limit mechanism, is not necessarily to clamping transmission shaft, operation side
Just.
(4) second workpiece polishing mechanisms are slidably connected on the rack, and shaft end polishing work can be carried out to the transmission shaft of different length.
(5) adjusting the first screw rod and the second screw rod, limit plate and connecting plate can move above and below, thus can be to different-diameter
Transmission shaft carry out shaft end polish work.
(6) polishing work carried out to the transmission shaft of same diameter, it is subsequent not have to adjust after first time regulation position limiting mechanism,
It is easy to operate.
Further, position-limit mechanism includes that the first support block and second being respectively fixedly connected in workbench left part and right part is supported
Block is threaded with third screw rod in the second support block.Transmission shaft outer wall is contacted with the first support block as a result, then adjusts third screw rod,
Make third screw rod close to transmission shaft, to realize located lateral of the transmission shaft in polishing channel, transmission shaft can be in polishing channel
Interior rotation is without transverse movement.
Further, table inclination is arranged, and discharging mechanism is located at the lower end of workbench, and feed pipe is located at the height of workbench
At end.Thus it is smoothly fed and discharge convenient for transmission shaft by gravity.
Further, discharging mechanism includes the reclaiming plate of rotation connection on the table, and the lower section of reclaiming plate free end is equipped with
The free end interval of the switch block of rotation connection on the table, switch block and reclaiming plate offsets, and switch block is rotatablely connected on the table,
Discharge port is fixedly connected with fixed block close to the junction of reclaiming plate and workbench, and tension spring, tension spring are fixedly connected on fixed block
One end far from fixed block is fixedly connected with reclaiming plate.
Manual rotation's switch block as a result, contacts switch block with reclaiming plate, the tension spring that is stretched restore deformation make reclaiming plate around
The tie point of itself and workbench rotates and opens discharge port；After transmission shaft is completely exhausted out, manual rotation's reclaiming plate closes discharge port
It closes, then rotates switch block, switch block and reclaiming plate is made to offset and restore initial position.
Further, the slip connection mode of the second workpiece polishing mechanism and rack is that support plate is slidably connected in rack, second
Workpiece polishing mechanism is fixedly connected on the supporting plate, and rack is equipped with the driving mechanism for sliding support plate on the rack.
As a result, without the second workpiece polishing mechanism of artificial sliding, make the second workpiece polishing mechanism to side close or far from workbench
To movement, the labor intensity of people is reduced.
Further, driving mechanism includes the hydraulic cylinder being fixedly connected on the rack, and hydraulic cylinder is equipped with telescopic shaft, telescopic shaft
One end far from hydraulic cylinder is fixedly connected with support plate.
Hydraulic cylinder makes flexible elongate axis or shortening as a result, telescopic shaft make the second conveyer belt to close by support plate or
Person moves far from the direction of workbench.
Further, the first workpiece polishing mechanism includes the first conveyer belt of connection on the rack, and the first conveyer belt is close to workbench
Side be fixedly connected with several first sanding blocks；Second workpiece polishing mechanism includes connection the second conveyer belt on the rack, and first
Conveyer belt is fixedly connected with several second sanding blocks close to the side of workbench.As a result, by be arranged several first sanding blocks and
Several second sanding blocks improve grinding efficiency.
Further, rivet is fixedly connected on the first screw rod, the first screw rod is riveted by rivet and limit plate activity；Second
The upper end of screw rod is also fixedly connected with rivet, and the second screw rod is riveted also by rivet and connecting plate activity.The first screw rod is logical as a result,
The rotation connection of rivet limit plate is crossed, the second screw rod is connect also by rivet with connecting plate.
Further, the first screw rod, the second screw rod and third screw rod are fixedly connected to handle.It is convenient for manually passing through as a result,
Rotational handle adjusts the first screw rod, the second screw rod or third screw rod.
Further, worktable upper surface is smooth surface.Reduce the frictional force between transmission shaft and workbench as a result, is convenient for discharge
When transmission shaft be smoothly discharged.
It is described above left and right, preceding or after only indicate relative positional relationship, not absolute positional relation.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of the utility model embodiment.
Fig. 2 is the A-A cross-sectional view (not drawing transmission shaft in figure) in Fig. 1.
Specific embodiment
The utility model is described in further detail below by specific embodiment:
Appended drawing reference in Figure of description includes: the first screw rod 1, the first support block 2, transmission shaft 3, workbench 4, limit plate
5, feedboard 6, feed pipe 7, feed inlet 71, connecting plate 8, third screw rod 9, handle 10, the second screw rod 11, the second support block 12,
One conveyer belt 13, the first sanding block 14, telescopic shaft 15, support plate 16, hydraulic cylinder 17, the second conveyer belt 18, the second sanding block 19,
Rivet 20, fixed block 21, tension spring 22, reclaiming plate 23, switch block 24.
Embodiment is substantially as depicted in figs. 1 and 2: a kind of transmission shaft processing unit (plant), including rack, the first workpiece polishing mechanism and
Second workpiece polishing mechanism is welded with the workbench 4 being obliquely installed in rack, and 4 upper surface of workbench is smooth surface, to reduce transmission shaft 3
It with the frictional force between workbench 4, is smoothly discharged convenient for transmission shaft 3 when discharge, the left part of workbench 4 is end portion, workbench 4
Right part be high end, workbench 4 is equipped with limit plate 5, and limit plate 5 is arranged in parallel with workbench 4, limit plate 5 and workbench 4
Between formed polishing channel.The high-end place of workbench 4 is equipped with feed pipe 7, and the lower end of feed pipe 7 is equipped with feed inlet 71, limit plate 5
It is welded with the lower-left end of feed pipe 7, the bottom righthand side of feed pipe 7 is welded with lateral connecting plate 8, is equipped at feed inlet 71 laterally sliding
The dynamic feedboard 6 being connected on feed pipe 7, feedboard 6 is equipped with knob, convenient for pushing away, drawing in flitch 6.The left part spiral shell of workbench 4
Line is connected with the first vertical screw rod 1, and the upper end of the first screw rod 1 and limit plate 5 are rotatablely connected, the lower end welding of the first screw rod 1
There are handle 10, the specific rotation connection mode of the first screw rod 1 and limit plate 5 are as follows: the upper end of the first screw rod 1 is welded with rivet 20,
First screw rod 1 is riveted by rivet 20 and 5 activity of limit plate.The right part of workbench 4 is threaded with the second vertical screw rod 11,
The upper end of second screw rod 11 and connecting plate 8 are rotatablely connected, and the lower end of the second screw rod 11 is also welded with handle 10, the second screw rod 11 with
The specific rotation connection mode of connecting plate 8 are as follows: the upper end of the second screw rod 11 is also welded with rivet 20, and the second screw rod 11 is also by riveting
Nail 20 is riveted with 8 activity of connecting plate.Workbench 4 is equipped with the position-limit mechanism for preventing the play in polishing channel of transmission shaft 3, limit
Mechanism includes being respectively welded at the first support block 2 and the second support block 12 of 4 left part of workbench and right part, and screw thread connects in the second support block 12
It is connected to lateral third screw rod 9, the right end of third screw rod 9 is also welded with handle 10.The end portion of workbench 4 is equipped with discharge port,
Collection frame (not shown) is equipped with below discharge port, discharge outlet is equipped with discharging mechanism, and discharging mechanism includes turning by hinge
The dynamic reclaiming plate 23 being connected on workbench 4, the left end of reclaiming plate 23 are free end, and the lower-left end of reclaiming plate 23, which is equipped with, passes through pin
Axis is rotatably connected on the switch block 24 on workbench 4, and switch block 24 and the free end interval of reclaiming plate 23 offset, the right side weldering of discharge port
It is connected to fixed block 21, tension spring 22 is welded on fixed block 21, the one end of tension spring 22 far from fixed block 21 and reclaiming plate 23 weld.
In conjunction with as shown in Figure 2, the first workpiece polishing mechanism is located at the rear side of workbench 4, and the first workpiece polishing mechanism includes passing through bolt
Connection the first conveyer belt 13 on the rack, the first conveyer belt 13 have been bolted several the close to the side of workbench 4
One sanding block 14.Support plate 16, the specific slip connection mode of support plate 16 and rack are as follows: in rack are slidably connected in rack
Equipped with sliding slot, support plate 16 is equipped with the protrusion cooperated with sliding slot, and support plate 16 is connect by protrusion with the sliding slot in rack；The
Two workpiece polishing mechanisms are located at the front side of workbench 4, and the second workpiece polishing mechanism includes that second be bolted in support plate 16 passes
Band 18 is sent, several second sanding blocks 19 have been bolted close to the side of workbench 4 in the second conveyer belt 18, and rack is equipped with
The driving mechanism for sliding support plate 16 on the rack, driving mechanism include the hydraulic cylinder 17 being bolted on the rack,
Hydraulic cylinder 17 is equipped with telescopic shaft 15, and the one end of telescopic shaft 15 far from hydraulic cylinder 17 is connect by bolt with support plate 16.
Specific implementation process is as follows: as shown in Figure 1, feed inlet 71 and discharge port are turned off when initial.By biography to be polished
Moving axis 3 is placed in feed pipe 7, manually pulls feedboard 6 to the left, and feed inlet 71 is opened, and transmission shaft 3 enters from feed inlet 71
It is artificial to push feedboard 6 after transmission shaft 3 is covered with polishing channel into polishing channel, close feed inlet 71.Then manual adjustment
Third screw rod 9 makes third screw rod 9 have gap between the outer wall of transmission shaft 3, third screw rod 9 and transmission shaft 3, thus polishes
When the end face of transmission shaft 3, transmission shaft 3 can polishing channel in rotation, but not polishing channel in play.It manually starts hydraulic
Cylinder 17, in conjunction with Fig. 2 it is found that hydraulic cylinder 17 extends telescopic shaft 15, telescopic shaft 15 moves support plate 16, and support plate 16 makes second
Conveyer belt 18 move to close to the direction of workbench 4, and the second sanding block 19 is moved with the second conveyer belt 18, the second sanding block 19 and
Transmission shaft 3 contacts, and telescopic shaft 15 continues to extend, and the second sanding block 19 contacts transmission shaft 3 with the first sanding block 14, realizes transmission
Then the axially position of axis 3 manually closes hydraulic cylinder 17.Manually start the first conveyer belt 13 and the second conveyer belt 18, first dozen
Abrading block 14 and the second sanding block 19 are moved with the first conveyer belt 13 and the second conveyer belt 18, are thus carried out to the both ends of transmission shaft 3
It polishes, generates frictional force, the first sanding block between 3 end face of the first sanding block 14 and the second sanding block 19 and transmission shaft in bruting process
14 and second sanding block 19 movement make 3 rotation of transmission shaft, thus can 3 two end faces of transmission shaft be polished more evenly.Completion is beaten
It is artificial to stop the first conveyer belt 13 and the second conveyer belt 18 after grinder is made, hydraulic cylinder 17 is then manually started, hydraulic cylinder 17 makes to stretch
Contracting axis 15 shortens, and telescopic shaft 15 moves the second conveyer belt 18 to the direction far from workbench 4 by support plate 16, and restores just
Then beginning state manually closes hydraulic cylinder 17.Manual rotation's switch block 24 contacts switch block 24 with reclaiming plate 23, is stretched
Tension spring 22, which restores deformation, makes reclaiming plate 23 open discharge port around its tie point rotation with workbench 4, since workbench 4 tilts
Setting, after discharge port is opened, transmission shaft 3 enters in collection frame after discharge port discharge automatically.The transmission shaft 3 polished in channel is complete
After full discharge, manual rotation's reclaiming plate 23 closes discharge port, then rotates switch block 24, switch block 24 is made to offset with reclaiming plate 23
And restore initial position.
When 3 diameter of transmission shaft for needing to polish is bigger, manual adjustment the first screw rod 1 and the second screw rod 11 make limit plate 5
Far from workbench 4, increases the distance between workbench 4 and limit plate 5, positioned so as to the transmission shaft 3 bigger to diameter；
For the first time when the polishing bigger transmission shaft 3 of diameter, manual adjustment third screw rod 9 is needed, makes third screw rod 9 close to 3 outer wall of transmission shaft；By
This realizes positioning of the transmission shaft 3 in polishing channel by adjusting the first screw rod 1, the second screw rod 11 and third screw rod 9, to diameter
Bigger transmission shaft 3 carries out polishing work, in subsequent bruting process, without adjusting third screw rod when 3 diameter of transmission shaft is unchanged
9.Similarly, when 3 diameter of transmission shaft for needing to polish is smaller, manual adjustment the first screw rod 1, the second screw rod 11 and third screw rod 9,
To carry out shaft end polishing work to the smaller transmission shaft of diameter 3.The utility model can carry out two to more transmission shafts 3 simultaneously
The polishing work of end face, also accommodate different-diameter, different length transmission shaft 3 shaft end polishing work, and transmission shaft 3
Positioning is convenient, is not necessarily to artificial clamping.
It is described above left and right, preceding or after only indicate relative positional relationship, not absolute positional relation.
Above-described is only preferred embodiments of the present invention, it is noted that for those skilled in the art
For, without departing from the concept of the premise utility, several modifications and improvements can also be made, these also should be considered as this
The protection scope of utility model, these all will not influence the effect and patent practicability of the utility model implementation.This is practical new
Technology, shape, the construction portion of the omitted description of type are well-known technique.
Claims (9)
1. a kind of transmission shaft processing unit (plant), it is characterised in that: including rack, the first workpiece polishing mechanism and the second workpiece polishing mechanism, machine
Workbench is fixedly connected on frame, the first workpiece polishing mechanism is fixedly connected with the rear side on the rack and being located at workbench, the second polishing
On the rack and positioned at the front side of workbench, the glide direction of the second workpiece polishing mechanism and the axis of transmission shaft are flat for mechanism slips connection
Row；Workbench is equipped with limit plate parallel with it, and polishing channel, the upper right side of limit plate are formed between limit plate and workbench
It is fixedly connected with feed pipe, the lower end of feed pipe is equipped with feed inlet, and the bottom righthand side of feed pipe is fixedly connected with connecting plate, feed inlet
Place is equipped with the feedboard for turning on or off feed inlet；The left part of workbench is threaded with the first screw rod, the first screw rod and limit
Position plate rotation connection, the right part of workbench are threaded with the second screw rod, and the second screw rod and connecting plate are rotatablely connected；On workbench
Equipped with the position-limit mechanism for preventing transmission shaft transverse movement in polishing channel, workbench is equipped with discharge port, and discharge outlet is equipped with
Discharging mechanism.
2. a kind of transmission shaft processing unit (plant) according to claim 1, it is characterised in that: the position-limit mechanism includes difference
It is fixedly connected on the first support block and the second support block of the workbench left part and right part, is threaded with third silk in the second support block
Bar.
3. a kind of transmission shaft processing unit (plant) according to claim 1, it is characterised in that: the table inclination setting,
The discharging mechanism is located at the lower end of workbench, and the feed pipe is located at the high-end place of workbench.
4. a kind of transmission shaft processing unit (plant) according to claim 3, it is characterised in that: the discharging mechanism includes rotation
Connection reclaiming plate on the table, the lower section of reclaiming plate free end are equipped with the switch block of rotation connection on the table, switch block with
The free end interval of reclaiming plate offsets, and switch block is rotatablely connected connection of the discharge port close to reclaiming plate and workbench on the table
Place is fixedly connected with fixed block, and tension spring, the one end of tension spring far from fixed block and the fixed company of reclaiming plate are fixedly connected on fixed block
It connects.
5. a kind of transmission shaft processing unit (plant) according to claim 1, it is characterised in that: second workpiece polishing mechanism and institute
The slip connection mode for stating rack is that support plate is slidably connected in rack, and the second workpiece polishing mechanism is fixedly connected on the supporting plate,
Rack is equipped with the driving mechanism for sliding support plate on the rack.
6. transmission shaft processing unit (plant) according to claim 5, it is characterised in that: the driving mechanism includes being fixedly connected
Hydraulic cylinder on the rack, hydraulic cylinder are equipped with telescopic shaft, the one end of telescopic shaft far from hydraulic cylinder and the fixed company of the support plate
It connects.
7. a kind of transmission shaft processing unit (plant) according to claim 1, it is characterised in that: first workpiece polishing mechanism includes
The first conveyer belt of connection on the rack, the first conveyer belt are fixedly connected with several first sanding blocks close to the side of workbench；
Second workpiece polishing mechanism includes the second conveyer belt of connection on the rack, and the first conveyer belt is close to the fixed company in the side of workbench
It is connected to several second sanding blocks.
8. a kind of transmission shaft processing unit (plant) according to claim 2, it is characterised in that: first screw rod, described
Two screw rods and the third screw rod are fixedly connected to handle.
9. a kind of transmission shaft processing unit (plant) described according to claim 1~any one of 8, it is characterised in that: the work
Making platform upper surface is smooth surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821127847.6U CN208428046U (en) | 2018-07-16 | 2018-07-16 | A kind of transmission shaft processing unit (plant) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821127847.6U CN208428046U (en) | 2018-07-16 | 2018-07-16 | A kind of transmission shaft processing unit (plant) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208428046U true CN208428046U (en) | 2019-01-25 |
Family
ID=65099738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821127847.6U Expired - Fee Related CN208428046U (en) | 2018-07-16 | 2018-07-16 | A kind of transmission shaft processing unit (plant) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208428046U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637816A (en) * | 2018-07-16 | 2018-10-12 | 重庆炅达贸易有限公司 | A kind of transmission shaft processing unit (plant) |
| CN110587392A (en) * | 2019-09-27 | 2019-12-20 | 曹星球 | Building pipe surface treatment device |
| CN110977717A (en) * | 2019-12-26 | 2020-04-10 | 周洪峰 | Steel bar lifting type rust removing device for bridge construction |
-
2018
- 2018-07-16 CN CN201821127847.6U patent/CN208428046U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637816A (en) * | 2018-07-16 | 2018-10-12 | 重庆炅达贸易有限公司 | A kind of transmission shaft processing unit (plant) |
| CN110587392A (en) * | 2019-09-27 | 2019-12-20 | 曹星球 | Building pipe surface treatment device |
| CN110977717A (en) * | 2019-12-26 | 2020-04-10 | 周洪峰 | Steel bar lifting type rust removing device for bridge construction |
| CN110977717B (en) * | 2019-12-26 | 2021-05-28 | 周洪峰 | Steel bar lifting type rust removing device for bridge construction |
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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: 20190125 Termination date: 20190716 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |