CN211421128U - Improved rotary braking structure of hanging bracket of pile driver - Google Patents
Improved rotary braking structure of hanging bracket of pile driver Download PDFInfo
- Publication number
- CN211421128U CN211421128U CN201921593643.6U CN201921593643U CN211421128U CN 211421128 U CN211421128 U CN 211421128U CN 201921593643 U CN201921593643 U CN 201921593643U CN 211421128 U CN211421128 U CN 211421128U
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- power device
- frame body
- rotating shaft
- pile driver
- rotate
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Abstract
An improved pile driver boom rotation stop arrangement comprising: a hanger frame, which is provided with a rotating shaft, a frame body and a power device, wherein the rotating shaft is provided with a fluted disc, a penetrating part and a pivoting part, the frame body is provided with a perforation, a pivoting groove and two hanging ends, two sides of the pivoting groove are respectively provided with a dustproof wall, each hanging end is respectively provided with a hanging hole, one end of the fluted disc is provided with a tooth part, the tooth part is provided with a plurality of tooth grooves, the power device is provided with a transmission part, the transmission part is connected with the tooth part for movement, and the pivoting part is provided with a limiting disc; therefore, the hanging bracket rotary braking structure of the pile driver is provided, and particularly, the hanging bracket rotary braking function with dust reduction is achieved by arranging the transmission member in the pivot groove to reduce the influence of dust in the operation process.
Description
Technical Field
The present invention relates to an improved rotary braking structure for a hanging bracket of a pile driver, and more particularly to a rotary braking structure for a hanging bracket of a pile driver, which reduces the influence of dust by disposing a transmission member in a pivoting groove during the operation process, thereby achieving the function of reducing dust.
Background
The common vibration pile driver uses a vibration mode to enable a pile hammer to impact the ground, uses a repeated and rapid impact mode to chisel the ground, and needs to adjust the steering direction of the pile hammer before chiseling so that the pile hammer can be vertical to the ground and can completely apply force to the ground; the pile driver comprises a pile hammer, a pile frame and accessory equipment, wherein the pile hammer is arranged between gantries at the front part of the pile frame and is hoisted by using a hoisting hook, wherein the pile driver can be further divided into a drop hammer pile driver, an air hammer pile driver, a diesel pile driver, a hydraulic pile driver or a spiral pile driver according to a power source; the common crane of pile driver can rotate freely, the direction of the crane must be adjusted by impacting other objects before use, and the crane is pushed by a hydraulic piston brake device to be fixed and can not rotate, and a power motor is arranged at the upper end of the crane and pushes a fluted disc on a rotating shaft through a gear, so that the crane rotates, and the operation is simpler.
According to above-mentioned structure, raise the sandy soil easily at the pile driving in-process, cause the easy sediment silt of gallows upper end, can cause gear and fluted disc card solid when silt silts up in the fluted disc, and then lead to the gallows can not rotate, is a big drawback problem really, and the urgent need is improved.
Disclosure of Invention
The utility model discloses a main objective lies in: an improved rotary braking structure for the hanging frame of pile driver is disclosed, which features that the drive member is pivoted in said pivoted slot to reduce the influence of dust.
In order to achieve the above object, the utility model relates to a modified pile driver gallows spin braking structure, its characterized in that: comprises the following steps:
a hanger frame, which is provided with a rotating shaft, a frame body and a power device, wherein the rotating shaft is provided with a fluted disc, a penetrating part and a pivot part, the frame body is provided with a perforation, a pivot groove and two hanging ends, the perforation is communicated with the pivot groove, two sides of the pivot groove are respectively provided with a dustproof wall, each hanging end is respectively provided with a hanging hole, the penetrating part is penetrated in the perforation, the fluted disc is arranged in the pivot groove, one end of the fluted disc is provided with a tooth part, the tooth part is provided with a plurality of tooth grooves, the power device is arranged in the pivot groove, one end of the power device is provided with a transmission piece, the transmission piece is connected with the tooth part to drive the frame body to rotate when the power device rotates, the pivot part is provided with a limiting disc, the limiting disc is arranged at the upper end of the perforation, the outer diameter of the limiting disc is larger than the inner diameter of the perforation, and the penetrating part is limited at the perforation to be in a rotating state, the power device controls the frame body to rotate by the transmission piece, and when the power device stops rotating, the rotating shaft and the frame body are in a fixed state.
Because the utility model discloses modified pile driver gallows spin brake structure, its efficiency lies in: by means of the hanger, which is provided with the rotating shaft, the frame body and the power device, the rotating shaft is provided with the fluted disc, the penetrating part and the pivot part, the frame body is provided with the through hole, the pivot groove and each hanging end, the through hole of the frame body is communicated with the pivot groove of the frame body, two sides of the pivot groove of the frame body are provided with each dustproof wall, each hanging end of the frame body is provided with each hanging hole, the penetrating part of the rotating shaft is penetrated in the through hole of the frame body, the fluted disc of the rotating shaft is arranged in the pivot groove of the frame body, one end of the fluted disc of the rotating shaft is provided with the tooth part, the tooth part of the fluted disc of the rotating shaft is provided with each tooth groove, the power device is arranged in the pivot groove of the frame body, one end of the power device is provided with the transmission part, the transmission part of the power device is linked with the tooth part of the fluted disc of the rotating shaft, so that the power device can drive the frame body to rotate when rotating, the pivot part of the rotating shaft, the limiting disc of the pivoting part of the rotating shaft is arranged at the upper end of the perforation of the frame body, the outer diameter of the limiting disc of the pivoting part of the rotating shaft is larger than the inner diameter of the perforation of the frame body, so that the penetrating part of the rotating shaft is limited at the perforation of the frame body to be in a rotatable state, the power device controls the frame body to rotate by the transmission piece, and when the power device stops rotating, the rotating shaft and the frame body are in a fixed state; therefore, the hanging bracket rotary braking structure of the pile driver is provided, and particularly, the hanging bracket rotary braking function with dust reduction is achieved by arranging the transmission member in the pivot groove to reduce the influence of dust in the operation process.
Drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a perspective exploded view of the present invention.
Fig. 3 is a schematic cross-sectional view of the present invention.
Fig. 4 is a schematic bottom view of the present invention.
Fig. 5 is a schematic diagram of a connection structure block of the power device, the pumping device and the control device of the present invention.
Fig. 6 is a schematic perspective exploded view of the device of the present invention.
Fig. 7 is a schematic diagram of the preferred embodiment of the present invention.
Detailed Description
Firstly, please refer to fig. 1 to 7, which show an improved crane hanger rotation braking structure of the present invention; comprises the following steps: a hanger A, the hanger A is provided with: a rotating shaft 1, a frame body 2 and a power device 3; wherein:
the hanger A is provided with the rotating shaft 1, the frame body 2 and the power device 3, the rotating shaft 1 is provided with a fluted disc 11, a penetrating part 12 and a pivoting part 13, the frame body 2 is provided with a through hole 21, a pivoting groove 22 and two hanging ends 23, the through hole 21 of the frame body 2 is communicated with the pivoting groove 22 of the frame body 2, two sides of the pivoting groove 22 of the frame body 2 are respectively provided with a dustproof wall 221, each hanging end 23 of the frame body 2 is respectively provided with a hanging hole 231, the penetrating part 12 of the rotating shaft 1 is penetrated in the through hole 21 of the frame body 2, the fluted disc 11 of the rotating shaft 1 is arranged in the pivoting groove 22 of the frame body 2, one end of the fluted disc 11 of the rotating shaft 1 is provided with a tooth part 111, the tooth part 111 of the fluted disc 11 of the rotating shaft 1 is provided with a plurality of tooth grooves 1111, the power device 3 is arranged in the pivoting groove 22 of the frame body 2, one end of the power device 3 is provided with a transmission piece 31, the tooth part 31 of the power device 3 is movably connected with the transmission piece 111 of the fluted disc 11 of the rotating shaft 1, the power device 3 is driven to rotate when rotating, the frame body 2 is driven to rotate, the pivot part 13 of the rotating shaft 1 is provided with a limiting disc 131, the limiting disc 131 of the pivot part 13 of the rotating shaft 1 is arranged at the upper end of the through hole 21 of the frame body 2, the outer diameter of the limiting disc 131 of the pivot part 13 of the rotating shaft 1 is larger than the inner diameter of the through hole 21 of the frame body 2, the penetrating part 12 of the rotating shaft 1 is limited at the through hole 2 of the frame body 2 to be in a rotatable state, the power device 3 controls the frame body 2 to rotate by the transmission piece 31, and when the power device 3 stops rotating, the rotating shaft 1 and the frame body 2 are in a fixed state;
with the above structure, the following is further described:
the tooth portion 111 of the gear plate 11 of the rotating shaft 1 is disposed on the outer edge of the gear plate 11 of the rotating shaft 1 from 90 degrees to 120 degrees, so that the frame body 2 can be limited to rotate within a predetermined angle, and the frame body 2 is limited to rotate within the predetermined angle, so that a pipeline connected to the power device can be prevented from being twisted off in the rotating process;
the transmission member 31 of the power device 3 is in a worm form, and the tooth portion 111 of the fluted disc 11 of the rotating shaft 1 is in a worm wheel form, so that the transmission member 31 of the power device 3 and the fluted disc 11 of the rotating shaft 1 are driven to generate a large torque, and the power of the power device 3 is converted into the rotational kinetic energy of the fluted disc 11 of the rotating shaft 1 by the transmission member 31 of the power device 3 in a worm transmission manner;
the number of teeth of the worm of the transmission member 31 of the power device 3 is 1, so that when the transmission member 31 of the power device 3 makes one rotation, the tooth portion 111 of the fluted disc 11 of the rotating shaft 1 advances by 1 tooth number, thereby controlling the gear ratio of the transmission member 31 of the power device 3 and the tooth portion 111 of the fluted disc 11 of the rotating shaft 1, increasing the link force of the frame body 2 during rotation by using the gear ratio, and further increasing the braking efficiency of the power device by using the lifting link force;
a bearing 4 is arranged between the through hole 21 of the frame body 2 and the penetrating part 12 of the rotating shaft 1, so that the frame body 2 can rotate more smoothly, the bearing 4 is an oil seal bearing, and the bearing 4 is provided with an oil seal to isolate dust in the environment, thereby reducing the influence caused by dust deposition in the operation process;
or, at least one groove 121 may be further disposed on the outer edge of the penetrating portion 12 of the rotating shaft 1, and a paraffin 122 is disposed in each groove 121 of the penetrating portion 12 of the rotating shaft 1, so that the penetrating portion 12 of the rotating shaft 1 has a self-lubricating function, and the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 is attached to the inner edge of the through hole 21 of the rack body 2, so that when the rack body 2 rotates, the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 rubs against the inner edge of the through hole 21 of the rack body 2, so that the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 is smeared between the penetrating portion 12 of the rotating shaft 1 and the through hole 21 of the rack body 2, and the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 has a lubricating function to keep the rack body 2 to run smoothly;
moreover, at least one groove 211 can be further disposed on the inner edge of the through hole 21 of the frame body 2, and a paraffin 212 is disposed in each groove 211 of the through hole 21 of the frame body 2, so that the through hole 21 of the frame body 2 has a self-lubricating function, and further, each groove 121, 211 and each paraffin 122, 212 can be simultaneously disposed on the outer edge of the through portion 12 of the rotating shaft 1 and the inner edge of the through hole 21 of the frame body 2, so as to greatly reduce the friction force when the frame body 2 rotates;
the power device 3 is further provided with a shaft bracket 33, the shaft bracket 33 of the power device 3 is pivotally fixed in the pivoting groove 22 of the frame body 2, two sides of the shaft bracket 33 of the power device 3 are respectively pivotally provided with a bearing 34, a transmission member 31 of the power device 3 is clamped between the bearings 34 of the power device 3, the transmission member 31 of the power device 3 and the shaft bracket 34 of the power device 3 are in a pivoting connection state, and the bearings 34 of the power device 3 are tapered roller bearings, so that the bearings 34 of the power device 3 have a multidirectional limiting stress on the transmission member 31 of the power device 3, and the transmission member 31 of the power device 3 is prevented from being loosened by a torsion force generated when the transmission member 31 of the power device 3 rotates;
wherein a hydraulic motor 35 is further disposed at one end of the shaft bracket 33 of the power device 3, the hydraulic motor 35 of the power device 3 is linked with the transmission member 31 of the power device 3 by a shaft 36, so that the hydraulic motor 35 of the power device 3 controls the transmission member 31 of the power device 3 to rotate, and the hydraulic motor 35 of the power device 3 is utilized to input liquid to rotate the power device 3, when the input of liquid is stopped, the power device 3 is not rotatable, thereby having a braking function;
wherein the power device 3 is provided with two flow guide pipes 32, each flow guide pipe 32 of the power device 3 is communicated with a pumping device 5, so that the pumping device 5 pushes liquid to control the power device 3 to rotate, the pumping device 5 is a bidirectional pump, so that the pumping device 5 can push the power device 3 to rotate forwards or backwards, and further the frame body 2 can rotate bidirectionally;
the pumping device 5 is electrically connected with a control device 6, and the control device 6 controls the direction of the liquid pushed by the pumping device 5 or stops pushing the liquid, so that a user can control the rotating direction of the frame body 2 by operating the control device 6;
particularly, the power device 3 further penetrates the rotating shaft into the pivot groove 22 from the upper end of the frame body, and the transmission gear is arranged in the pivot groove 22 and is linked with the fluted disc 11, so that the power device 3 can also reduce the influence of dust by arranging the transmission gear in the pivot groove 22, and the gear has smaller torque force and does not have a braking function, and further a piston type braking structure needs to be additionally arranged, and the rotation is stopped by pushing and fixing a piston, as shown in fig. 7;
with the above in mind, the description of the operating status of the improved pile driver hanger rotation braking structure according to the preferred embodiment of the present invention includes: a hanger A, the hanger A is provided with: a rotating shaft 1, a frame body 2 and a power device 3; wherein: the structures of the hanger a, the rotating shaft 1, the frame body 2 and the power device 3 are described above, and therefore, the following descriptions are omitted:
firstly, the tooth portion 111 of the fluted disc 11 of the rotating shaft 1 is arranged on the outer edge of the fluted disc 11 of the rotating shaft 1 from 90 degrees to 120 degrees, so that the frame body 2 can be limited to rotate within a preset angle, and the pipeline connected with the power device 3 can be prevented from being twisted and broken in the rotating process by utilizing the frame body 2 to be limited to rotate within the preset angle; the transmission member 31 of the power device 3 is in a worm form, and the tooth portion 111 of the fluted disc 11 of the rotating shaft 1 is in a worm wheel form, so that the transmission member 31 of the power device 3 and the fluted disc 11 of the rotating shaft 1 are driven to generate a large torque, and the power of the power device 3 is converted into the rotational kinetic energy of the fluted disc 11 of the rotating shaft 1 by the transmission member 31 of the power device 3 in a worm transmission manner; the number of teeth of the worm of the transmission member 31 of the power device 3 is 1, so that when the transmission member 31 of the power device 3 makes one rotation, the tooth portion 111 of the fluted disc 11 of the rotating shaft 1 advances by 1 tooth number, thereby controlling the gear ratio between the transmission member 31 of the power device 3 and the tooth portion 111 of the fluted disc 11 of the rotating shaft 1, increasing the torsion of the frame body 2 during rotation by using the gear ratio, and further increasing the braking efficiency of the power device 3 by using the lifting torsion;
moreover, a bearing 4 is arranged between the through hole 21 of the frame body 2 and the penetrating part 12 of the rotating shaft 1, so that the frame body 2 can rotate more smoothly, the bearing 4 is an oil seal bearing, and the bearing 4 is provided with an oil seal to isolate dust in the environment, thereby reducing the influence caused by dust deposition in the operation process; or, at least one groove 121 may be further disposed on the outer edge of the penetrating portion 12 of the rotating shaft 1, and a paraffin 122 is disposed in each groove 121 of the penetrating portion 12 of the rotating shaft 1, so that the penetrating portion 12 of the rotating shaft 1 has a self-lubricating function, and the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 is attached to the inner edge of the through hole 21 of the rack body 2, so that when the rack body 2 rotates, the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 rubs against the inner edge of the through hole 21 of the rack body 2, so that the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 is smeared between the penetrating portion 12 of the rotating shaft 1 and the through hole 21 of the rack body 2, and the paraffin 122 of the penetrating portion 12 of the rotating shaft 1 has a lubricating function to keep the rack body 2 to run smoothly; moreover, at least one groove 211 can be further disposed on the inner edge of the through hole 21 of the frame body 2, and a paraffin 212 is disposed in each groove 211 of the through hole 21 of the frame body 2, so that the through hole 21 of the frame body 2 has a self-lubricating function, and further, each groove 121, 211 and each paraffin 122, 212 can be simultaneously disposed on the outer edge of the through portion 12 of the rotating shaft 1 and the inner edge of the through hole 21 of the frame body 2, so as to greatly reduce the friction force when the frame body 2 rotates;
the power device 3 is also provided with a hydraulic motor 35, which is used for inputting liquid to rotate the power device 3, when the liquid input is stopped, the power device 3 can not rotate, and further has a braking function, and the hydraulic motor 35 is in a non-rotatable state when the liquid stops flowing, so that the power device 3 not only can provide rotating power, but also can provide braking force for fixing the frame body 2; wherein the power device 3 is provided with two flow guide pipes 32, each flow guide pipe 32 of the power device 3 is communicated with a pumping device 5, so that the pumping device 5 pushes liquid to control the power device 3 to rotate, the pumping device 5 is a bidirectional pump, so that the pumping device 5 can push the power device 3 to rotate forwards or backwards, and further the frame body 2 can rotate bidirectionally; the pumping device 5 is electrically connected with a control device 6, and the control device 6 controls the direction of the liquid pushed by the pumping device 5 or stops pushing the liquid, so that a user can control the rotating direction of the frame body 2 by operating the control device 6;
finally, because the utility model discloses modified pile driver gallows spin brake structure, its efficiency lies in: by the hanger A, which is provided with the rotating shaft 1, the frame body 2 and the power device 3, the rotating shaft 1 is provided with the fluted disc 11, the penetrating portion 12 and the pivoting portion 13, the frame body 2 is provided with the through hole 21, the pivoting groove 22 and the hanging ends 23, the through hole 21 of the frame body 2 is communicated with the pivoting groove 22 of the frame body 2, two sides of the pivoting groove 22 of the frame body 2 are provided with the dust-proof walls 221, each hanging end 23 of the frame body 2 is provided with the hanging holes 231, the penetrating portion 12 of the rotating shaft 1 is penetrated in the through hole 21 of the frame body 2, the fluted disc 11 of the rotating shaft 1 is arranged in the pivoting groove 22 of the frame body 2, one end of the fluted disc 11 of the rotating shaft 1 is provided with the tooth portion 111, the tooth portion 111 of the fluted disc 11 of the rotating shaft 1 is provided with the tooth grooves 1111, the power device 3 is arranged in the pivoting groove 22 of the frame body 2, one end of the power device 3 is provided with the transmission member 31, and the transmission member 31 of the power device 3 is connected with the tooth portion 111 of the rotating shaft 1, the power device 3 is driven to rotate when rotating, the frame body 2 is driven to rotate, the pivot part 13 of the rotating shaft 1 is provided with the limiting disc 131, the limiting disc 131 of the pivot part 13 of the rotating shaft 1 is arranged at the upper end of the through hole 21 of the frame body 2, the outer diameter of the limiting disc 131 of the pivot part 13 of the rotating shaft 1 is larger than the inner diameter of the through hole 21 of the frame body 2, the penetrating part 12 of the rotating shaft 1 is limited at the through hole 2 of the frame body 2 to be in a rotatable state, the power device 3 controls the frame body 2 to rotate by the transmission piece 31, and when the power device 3 stops rotating, the rotating shaft 1 and the frame body 2 are in a fixed state; therefore, the hanging bracket rotary braking structure of the pile driver is provided, and particularly, the hanging bracket rotary braking function with dust reduction is achieved by arranging the transmission member in the pivot groove to reduce the influence of dust in the operation process.
In view of the above, an improved rotating brake structure for a hanger of a pile machine has not been shown in books and periodicals or publicly used, and thus conforms to the requirements of the novel patent application, and it is in accordance with the embodiments and technical principles of the present invention that the present invention should be within the scope of the present invention if the changes made in the concept of the present invention are not beyond the spirit covered by the description and drawings.
Claims (10)
1. The utility model provides a modified pile driver gallows spin brake structure which characterized in that: comprises the following steps:
a hanger frame, which is provided with a rotating shaft, a frame body and a power device, wherein the rotating shaft is provided with a fluted disc, a penetrating part and a pivot part, the frame body is provided with a perforation, a pivot groove and two hanging ends, the perforation is communicated with the pivot groove, two sides of the pivot groove are respectively provided with a dustproof wall, each hanging end is respectively provided with a hanging hole, the penetrating part is penetrated in the perforation, the fluted disc is arranged in the pivot groove, one end of the fluted disc is provided with a tooth part, the tooth part is provided with a plurality of tooth grooves, the power device is arranged in the pivot groove, one end of the power device is provided with a transmission piece, the transmission piece is connected with the tooth part to drive the frame body to rotate when the power device rotates, the pivot part is provided with a limiting disc, the limiting disc is arranged at the upper end of the perforation, the outer diameter of the limiting disc is larger than the inner diameter of the perforation, and the penetrating part is limited at the perforation to be in a rotating state, the power device controls the frame body to rotate by the transmission piece, and when the power device stops rotating, the rotating shaft and the frame body are in a fixed state.
2. The improved pile driver pylon rotation stop arrangement of claim 1, wherein: the power device is further provided with a shaft bracket which is pivoted and fixed in the pivoting groove, two sides of the shaft bracket are respectively pivoted with a bearing, and the transmission part is clamped between the bearings so that the transmission part and the shaft bracket are in a pivoting connection state.
3. The improved pile driver pylon rotation stop arrangement of claim 2, wherein: wherein a hydraulic motor is further arranged at one end of the shaft bracket, the hydraulic motor is linked with the transmission member by a shaft lever, so that the hydraulic motor controls the transmission member to rotate, the hydraulic motor is utilized to input liquid to enable the power device to rotate, and when the liquid input is stopped, the power device can not rotate, thereby having the braking function.
4. The improved pile driver pylon rotation stop arrangement of claim 1, wherein: wherein the transmission member is in a worm form, and the tooth portion is in a worm gear form, so that the transmission member and the fluted disc generate a larger torque force.
5. The improved pile driver pylon rotation stop arrangement of claim 4, wherein: the number of teeth of the worm of the transmission member is 1, and when the transmission member rotates for one circle, the tooth part advances by 1 tooth number.
6. The improved pile driver pylon rotation stop arrangement of claim 1, wherein: wherein a bearing is arranged between the through hole and the penetrating part to make the frame body rotate more smoothly.
7. The improved pile driver pylon rotation stop arrangement of claim 6, wherein: wherein the bearing is an oil seal bearing, and the bearing is provided with an oil seal to isolate dust in the environment, thereby reducing the influence caused by dust deposition in the operation process.
8. The improved pile driver pylon rotation stop arrangement of claim 1, wherein: the power device further penetrates the rotating shaft into the pivot groove from the upper end of the frame body, and a transmission gear is arranged in the pivot groove and is linked with the fluted disc.
9. The improved pile driver pylon rotation stop arrangement of claim 3, wherein: the power device is provided with two guide pipes, and each guide pipe is communicated with a pumping device to enable the pumping device to push liquid to control the power device to rotate.
10. The improved pile driver pylon rotation stop arrangement of claim 9, wherein: the pumping device is electrically connected with a control device, and the control device controls the pumping device to push the liquid direction or stop pushing the liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921593643.6U CN211421128U (en) | 2019-09-24 | 2019-09-24 | Improved rotary braking structure of hanging bracket of pile driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921593643.6U CN211421128U (en) | 2019-09-24 | 2019-09-24 | Improved rotary braking structure of hanging bracket of pile driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211421128U true CN211421128U (en) | 2020-09-04 |
Family
ID=72251985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921593643.6U Expired - Fee Related CN211421128U (en) | 2019-09-24 | 2019-09-24 | Improved rotary braking structure of hanging bracket of pile driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211421128U (en) |
-
2019
- 2019-09-24 CN CN201921593643.6U patent/CN211421128U/en not_active Expired - Fee Related
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Granted publication date: 20200904 |