CN109110671B - Electric screw self-locking connection lifting joint rod - Google Patents
Electric screw self-locking connection lifting joint rod Download PDFInfo
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- CN109110671B CN109110671B CN201810633892.7A CN201810633892A CN109110671B CN 109110671 B CN109110671 B CN 109110671B CN 201810633892 A CN201810633892 A CN 201810633892A CN 109110671 B CN109110671 B CN 109110671B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/44—Devices, e.g. jacks, adapted for uninterrupted lifting of loads with self-contained electric driving motors
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Abstract
The electric screw self-locking connection lifting joint rod is a lifting joint rod which is driven by a motor to rotate and can sequentially drive each convex circular lifting joint rod to move up and down and can be in self-locking connection between each convex circular lifting joint rod, when the motor drives the screw rod to rotate, the screw rod is sequentially and directly meshed with the running nuts connected with the lower parts of the convex round lifting sectional rods, the lifting rod sections can ascend or descend section by section through the vertical running force obtained by the rotation of the running nuts and the screw rod, after the lifting joint rods are sequentially lifted and unfolded to the proper position section by section, each adjacent convex round lifting joint rod is formed by engaging and connecting the reverse threads on the outer side surface of the self-locking bolt on the outer diameter surface of each running nut with the reverse threads on the upper part of the inner side of each relevant convex round lifting joint rod, the connecting structure is simple, the strength is high, the reliability is stable, and the lifting device not only can be used for lifting up and down, but also can be suitable for transverse push-pull operation and downward hanging operation.
Description
Technical Field
The invention relates to an electric screw rod self-locking connection lifting joint rod, in particular to a lifting joint rod which is driven by a motor to rotate and can sequentially drive each convex circular lifting joint rod to move up and down and be in self-locking connection between each convex circular lifting joint rod.
Background
At present, various lifting joint rods have certain technical difficulty for lifting of large loads and ultrahigh degrees, and the internal structure is complex, and the volume and the weight of the lifting joint rods are difficult to reduce, so that the following defects are caused.
1. The lifting rod of the steel wire rope structure is used for a long time, the steel wire rope is easy to break when being stretched, thinned or knotted, and can slide down gradually after being lifted in place, so that the state of long-term positioning and keeping is poor.
2. The multi-section inner screw rod structure is too complex in mechanical structure and has certain limitation on lifting height and lifting load.
3. The complex structure and the limit of the steel wire rope to load interruption can lead to the large appearance and the difficulty in reducing the self weight, increase the ineffective load of the lifting rod and be insufficient for the lifting operation with large load and super height.
4. The huge appearance can cause the processing difficulty, and the fault rate is high, and manufacturing cost increases, is more unfavorable for intelligent control.
Disclosure of Invention
The invention aims to overcome the defects, and provides a motor-driven screw rod which is driven to rotate, wherein the screw rod is sequentially and directly meshed with running nuts connected to the lower parts of all convex round lifting joint rods, and the lifting joint rods can ascend or descend section by section through the up-and-down running force obtained by the rotation of the running nuts and the screw rod, and when each lifting joint rod ascends to the right position, the lifting joint rod adjacent to the lower end of the lifting joint rod can be connected in a self-locking manner and continuously run.
The invention is realized by implementing the following method.
The electric screw rod is connected with the lifting joint rod in a self-locking way, the metal screw rod of the electric screw rod is vertically fixed at the central hole position in the aluminum alloy bearing sleeve, the bottommost part of the screw rod is sleeved with a metal gear, and the gear can be meshed with a reduction gear driven by a motor, so that the screw rod can be driven to rotate. The upper end of the aluminum alloy base sleeve is connected with the convex round lifting joint rod of the outermost aluminum alloy, the convex round lifting joint rod and the convex round lifting joint rod of the outermost aluminum alloy are on the same vertical axis, and the n convex round lifting joint rods of the aluminum alloy are sequentially sleeved from large to small and surround the screw rod at the center of the axis. The upper end of the stainless steel diamond supporting pipe at the innermost layer is fixed in the hard plastic supporting pipe sleeve, and the supporting pipe sleeve is fixed at the top platform end above the first convex round lifting joint rod.
The convex-concave positions of the inner part and the outer part of each convex round lifting joint rod are matched with each other to better play a role in vertical directional operation, and except for the innermost and outermost convex round lifting joint rods, the upper parts of the inner walls of other convex round lifting joint rods are provided with a section of reverse thread with the same thread pitch as the screw rod. And the inner walls of the lower parts of all the convex round lifting joint rods are all processed with threads, except that the lower end of the outermost convex round lifting joint rod is connected with the bearing sleeve, the lower parts of other convex round lifting joint rods are respectively connected with a metal running nut by threads. In the initial state, the running nuts connected below the innermost convex lifting section rod stop at the threaded part of the screw rod, and the running nuts connected below the other convex lifting section rods all stop at the unthreaded part of the screw rod.
The upper end of each running nut is provided with a thread connected with each lifting joint rod, the lower part of each running nut is provided with a transverse open slot which occupies about 60 degrees of the outer diameter of the running nut, the outer diameter of the running nut is sleeved with a metal self-locking bolt, and the outer side of the lowest end of each running nut is also provided with a section of thread. The inner diameter of each running nut is provided with a thread matched with the screw rod, and except the running nut assembled at the lowest part, a thread groove is machined on the thread groove bottoms of the inner diameters of the other n running nuts so as to enable the lock-pulling nail protruding from the upper end part of the screw rod to smoothly pass through. The outer circle surface of the self-locking bolt is provided with a reverse thread with the same thread pitch as the screw rod, a locking column is embedded at the position above a transverse open slot of the operating nut, and a small gap is kept between the front end of the locking column and the axial surface of the screw rod. A hard plastic rubber tightening ring is screwed on the thread at the lower end of the operating nut, so that the self-locking bolt cannot move up and down on the outer diameter of the operating nut at will, and after the tightening ring is arranged in the convex round type lifting joint rod, the side surface of the outer ring of the tightening ring and three convex surfaces corresponding to the inner part of the lifting joint rod are assembled in a zero matching mode.
The upper part of the innermost convex round lifting joint rod is connected with a metal top platform through a thread, a hard plastic supporting pipe sleeve is screwed on the top platform through a thread, the upper parts of the other n convex round lifting joint rods are connected with hard plastic fastening sleeves through threads, and the inner diameter of each fastening sleeve and three convex surfaces on the outer diameter of the convex round lifting joint passing through the fastening sleeve are zero fit clearance. A seal ring clamping groove is processed in an inner cavity of each fastening sleeve, a seal ring can be embedded into the groove, a clamp spring groove is further processed on the outer diameter surface of the upper portion of the fastening sleeve, a clamp spring can be buckled into the groove, a magnetic column hole is drilled in the clamp spring groove in the direction of the axis surface, a high-strength magnetic column is placed in the hole, the S pole of the high-strength magnetic column faces the axis surface, and the elastic clamp spring is directly clamped into the groove and presses the magnetic column in the axis direction.
Except for the two sections of the convex round lifting joint rods at the innermost layer and the outermost layer, the outer circle sides of the upper ends of the other n sections of the convex round lifting joint rods are all drilled with a locking hole in which a magnet column can be inserted. Except two convex round lifting joint rods at the outermost layer, magnetic sheet pits are respectively drilled on the outer circular surfaces of the lower end parts of the other n convex round lifting joint rods, a high-strength magnetic sheet can be embedded in each pit, the S pole surface of the magnetic sheet is installed outwards, and the magnetic sheet, the magnetic column hole in the fastening sleeve and the locking hole at the top outer circular end of the lifting joint rod are all on the same vertical surface.
When n convex lifting joint rods are in an initial state, the running nuts connected below the innermost convex lifting joint rod stop at the threaded part of the screw rod, and the running nuts connected below the other convex lifting joint rods stop at the non-threaded part of the screw rod. The motor is electrified to drive the reduction gear to rotate after running, and the gear is meshed with the gear on the screw rod to rotate reversely, the gear simultaneously drives the screw rod to run reversely, the screw rod and the running nut run mutually to generate a lifting force to drive the first convex circular lifting joint rod to ascend slowly, at the moment, the supporting pipe sleeve above the top platform of the first convex circular lifting joint rod is connected with the first stainless steel diamond supporting pipe to ascend synchronously, and the synchronously ascending diamond supporting pipe can prevent the longer screw rod from generating unnecessary vibration during running. The section-by-section lifting is the primary condition of normal operation, at this time, except for the two sections of the convex round lifting section rods at the innermost layer and the outermost layer, magnet columns are pressed in locking holes at the upper ends of the other n sections of the convex round lifting section rods by elastic snap springs, so that the two adjacent sections of the convex round lifting section rods are mutually locked by the magnet columns and cannot be lifted randomly.
When the magnet piece at the lower end of the first convex round lifting joint rod rises to the parallel position of the locking hole of the convex round lifting joint rod at the outer side, the S pole of the magnet column faces the S pole of the magnet piece, the same poles repel each other at the moment, the repelling force can push the elastic force of the elastic clamp spring to push the magnet column out of the locking hole, and therefore the interlocking state of the second convex round lifting joint rod and the third convex round lifting joint rod at the inner side is released. The self-locking bolt is synchronously brought to the reverse thread position inside the second convex circular lifting joint by the running nut, at the moment, the poking lock nail on the screw rod just touches the locking column on the self-locking bolt above the transverse open slot of the running nut, the locking column is driven to rotate reversely by about 60 degrees by the locking column under the driving of the reverse rotating force of the screw rod, simultaneously, the locking column on the self-locking bolt is separated from the poking lock nail on the screw rod along with the continuous rising of the running nut, the reverse thread on the outer diameter of the self-locking bolt is just screwed into the reverse thread inside the second convex circular lifting joint, and therefore the effect of firm connection between the first convex circular lifting joint rod and the second convex circular lifting joint rod is achieved.
Along with the continuation of first section convex circular lifting festival pole rises, at this moment alright synchronous drive second section convex circular lifting festival pole rises jointly, then just pull the operation nut of second section convex circular lifting festival pole below to the screw portion that has of lead screw, for this reason the second section convex circular lifting festival pole continues up-going operation under the drive of below operation nut, second section stainless steel rhombus stay tube is also driven simultaneously and is rising, after the operation nut of first section convex circular lifting festival pole below was unscrewed the lead screw completely, the power that rises just changes and is undertaken by the operation nut of second section convex circular lifting festival pole below. And then, each convex round lifting joint rod repeats the steps to achieve the purpose of ascending section by section, and when the n convex round lifting joint rods all ascend and the running nut below the penultimate convex round lifting joint rod reaches the position of the lock-pulling nail at the upper end of the screw rod, the ascending is stopped.
When the electric screw rod is connected with the lifting section rods in a self-locking mode and needs to descend after ascending in place section by section, the polarity of a power supply is switched to enable the motor to drive the screw rod to rotate in the forward direction, and then the screw rod and the running nut run mutually to generate descending force.
The transverse opening groove of the running nut below the penultimate convex round type lifting section rod also just runs to the poking and locking nail at the upper end of the screw rod, at the moment, the poking and locking nail on the screw rod just touches the engaging and locking column on the self-locking bolt above the transverse opening groove of the running nut, the engaging and locking column is driven by the forward rotating force of the screw rod poking and locking bolt to poke about 60 degrees in forward rotation, simultaneously, the engaging and locking column on the self-locking bolt is separated from the poking and locking nail on the screw rod along with the continuous descending of the running nut, the reverse thread on the outer diameter of the self-locking bolt just completely exits the reverse thread groove inside the penultimate convex round type lifting section rod, and therefore the penultimate convex round type lifting section rod and the penultimate convex round type lifting section rod continue to descend automatically after being effectively separated. At the moment, the lock hole at the upper end of the penultimate convex round lifting joint rod just moves to the hole position of the magnetic column at the upper end of the penultimate convex round lifting joint rod, the magnetic column in the magnetic column hole is immediately jacked into the lock hole at the upper end of the penultimate convex round lifting joint rod, and the interlocking of the penultimate convex round lifting joint rod and the penultimate convex round lifting joint rod is recovered. And then, each convex lifting joint rod repeats the steps to achieve the purpose of descending section by section, and when the n convex lifting joint rods are all reset and the running nut below the first convex lifting joint rod finally reaches the lower end of the threaded part of the screw rod, the descending is stopped.
After the n convex round type lifting joint rods are sequentially and completely lifted and unfolded in place section by section, each adjacent convex round type lifting joint rod is formed by meshing and connecting the reverse thread on the outer side of the self-locking bolt and the reverse thread on the upper part of the inner side of each relevant convex round type lifting joint rod, the connecting structure is simple, the strength is high, the reliability is stable, and the lifting joint rod is also suitable for transverse push-pull operation and downward hanging operation. Meanwhile, the convex round lifting joint rod structure is selected, so that the purpose of vertical directional operation can be achieved, and the inner dead space is greatly removed, so that the convex round lifting joint rod with a smaller circular cross section can bear larger load. In reality, if the load capacity needs to be further increased, only the circular cross section of each convex lifting joint rod needs to be enlarged, or the pipe wall thickness of each convex lifting joint rod needs to be increased, and the depth of the convex recess of each convex lifting joint rod needs to be deepened. If a certain lifting height is required, only the closing height needs to be reasonably selected and the number of the convex round lifting joint rods is increased.
The present invention will now be described in further detail with reference to the attached drawings.
Drawings
FIG. 1 is the present invention: the upper part main sectional view of the scheme that the electric screw rod is in self-locking connection with the lifting section bar is in a non-lifting state;
FIG. 2 is the present invention: the scheme of the electric screw rod self-locking connection lifting section rod is in a main sectional view at the lower part when the electric screw rod is not lifted out;
FIG. 3 is the present invention: a main sectional view of the scheme that the electric screw rod is in self-locking connection with the lifting section rod in a non-lifting state;
FIG. 4 is the present invention: each part of the scheme that the electric screw rod is in self-locking connection with the lifting section rod is schematically decomposed;
FIG. 5 is the present invention: the cross section of each part of the scheme that the electric screw rod is in self-locking connection with the lifting section rod is schematic;
Detailed Description
In fig. 1 to 5, a gear 0 is sleeved below a screw 32 of an electric screw self-locking connection lifting joint rod, a section of the lower end of the screw 32 is a non-threaded section 22, a convex shifting locking nail 19 is embedded on a thread back at the upper end of the threaded section 20, and the inner cavity of the screw 32 is vertically sleeved with each section of diamond-shaped supporting tube 1.2.3.4.5 and two bushings 6 respectively. The outer side of the screw rod 32 is sleeved with convex round lifting joint rods 10.11.12.13.14 which are vertical to each other and are sleeved in sequence from small to large, except for the innermost and outermost convex round lifting joint rods 10.14, the inner cavities at the upper ends of other convex round lifting joint rods 11.12.13 are all provided with a section of reverse thread 27, the outer side surface at the uppermost end is respectively provided with a lock buckle hole 25, the outer diameter surface of each convex round lifting joint rod 10.11.12.13.14 is provided with three convex positions 30, the inner diameter surface is provided with three concave positions 31, except for the outermost two convex round lifting joint rods 13.14, the outer diameter surface at the lower end of each convex round lifting joint rod 10.11.12 is provided with a magnetic sheet 23, and a magnetic sheet 36 can be pressed in the concave positions.
The lower part of the convex round type lifting joint rod 14 is connected with a bearing sleeve 7, two bearings 8 are pressed in the bearing sleeve 7, the lower parts of the other convex round type lifting joint rods 10.11.12.13 are respectively connected with a running nut 16, the inner diameter of the running nut 16 is processed with a normal thread 37, a thread groove 38 is processed at the bottom of the thread groove of the normal thread 37, the running nuts 16 except the lower end of the penultimate convex round type lifting joint rod are respectively sleeved with a self-locking bolt 17 at the outer diameter position of each running nut 16, the outer diameter surface of each self-locking bolt 17 is processed with a reverse thread 29, an engaging locking column 18 is embedded above a transverse 60-degree open slot 39 on the running nut 16, and then a top clamping ring 21 is screwed below the running nut 16. A top platform 9 is screwed on the top end of the innermost convex lifting joint rod 10, a supporting pipe sleeve 28 is screwed on the top platform 9, the upper ends of the other convex lifting joint rods 11.12.13.14 are respectively screwed with a fastening sleeve 15, a sealing ring groove 33 is processed on the inner diameter of each fastening sleeve 15, a sealing ring 34 can be placed in the sealing ring groove 33, a clamp spring groove 35 is processed on the outer diameter side of each fastening sleeve 15, a clamp spring 26 can be buckled in the clamp spring groove 35, and a magnetic column hole 3.6 is further drilled in the clamp spring groove 35 and can be used for placing a magnetic column 24.
As can be seen from the cross section 40 of the electric screw rod self-locking connection lifting joint rod, the structure is simple, the space utilization rate is high, and the final purpose that a larger load can be borne by a smaller cross section is achieved.
The working process when the electric screw rod is connected with the lifting section rod in a self-locking way is as follows:
fig. 1 to 3 are views showing an initial state of an electric screw rod self-locking connection lifting joint rod, when a gear 0 is driven by a motor to rotate reversely, the screw rod 32 is also driven to rotate reversely, at this time, a running nut 16 below a convex lifting joint rod 10 stops on a threaded part 20 of the screw rod 32, and other convex lifting joint rods 11.12.13 are driven synchronously, the running nuts 16 below the convex lifting joint rod 10 stop on a non-threaded part 22 of the screw rod 32, at this time, the running nut 16 below the convex lifting joint rod 10 only can drive the convex lifting joint rod 10, a top platform 9 and a support pipe sleeve 28 to ascend, and simultaneously, the synchronous ascending of the support pipe 1 is pulled, because the convex lifting joint rod 11.12.13 is pressed into a lock hole 25 at the upper end by a magnet column 24 to be locked, and at this time, the convex lifting joint rod 11.12.13 cannot ascend along with the ascending of the convex lifting joint rod 10.
When the magnet piece 36 in the magnet pit 23 at the lower end face of the convex round type lifting joint rod 10 moves to the parallel position of the locking hole 25 at the upper end of the convex round type lifting joint rod 11, the magnet column 24 in the locking hole 25 of the convex round type lifting joint rod 11 is pushed out by the magnetic repulsive force of the magnet piece 36, then the self-locking bolt 17 sleeved on the running nut 16 below the convex round type lifting joint rod 10 is driven to move to the position of the locking nail 19 at the upper end of the screw rod 32 at the position of the transverse 60-degree opening slot 39, at this time, the locking nail 19 on the screw rod 32 just touches the locking column 18 on the self-locking bolt 17, the locking nail 19 buckles the locking column 18 to drive the self-locking bolt 17 to rotate reversely by about 60 degrees and synchronously ascend along with the ascending of the running nut 16, the locking nail 19 on the self-locking bolt 17 is separated from the locking column 18 on the screw rod 32, at this time, the inverse thread 29 on the outer diameter face of the self-locking bolt 17 is just screwed in the upper thread 27 in the round type lifting joint rod 11, the convex round type lifting joint rod 10 is connected with the convex round type lifting joint rod 11.
The running nut 16 below the cam rod 10 then continues to run upwards, and first the running nut 16 below the cam rod 11 is pulled onto the threaded portion 20 of the threaded spindle 32, then runs on the threaded portion 20 of the threaded spindle 32 in synchronism with the running nut 16 below the cam rod 11 until finally the threaded spindle 32 is moved out of position, after which the lifting task is followed by the running nut 16 below the cam rod 11. Then, each convex lifting joint lever 11.12.13 only needs to repeat the above steps until the running nut 16 below the last convex lifting joint lever 13 is stopped when it is lifted to the position of the lock-pulling nail 19 of the screw rod 32, and at this time, the final purpose of lifting all the convex lifting joint levers 10.11.12.13 one by one is fully completed.
The working process of the electric screw rod when the self-locking connection lifting section rod descends is as follows:
when the motor is linked with the screw rod 32 to do forward rotation operation, the operation nut 16 below the penultimate convex round type lifting joint rod 13 drives the convex round type lifting joint rod 10.11.12 to move downwards along the screw rod 32, and simultaneously drives each supporting tube 1.2.3.4 in the inner cavity of the screw rod 32 to synchronously descend, when the operation nut 16 below the penultimate convex round type lifting joint rod 13 moves to the bottom end of the screw rod 32 with the threaded part 20, the operation nut 16 below the penultimate convex round type lifting joint rod 12 also synchronously moves to the position of the screw rod 32, at the moment, the operation nut 16 below the penultimate convex round type lifting joint rod 13 and the operation nut 16 below the penultimate convex round type lifting joint rod 12 simultaneously operate on the screw rod 32, then the magnet piece 36 on the lower end surface of the penultimate convex round type lifting joint rod 12 follows the parallel position of the locking hole 25 of the penultimate convex round type lifting joint rod 13, then, the running nut 16 below the last but one convex lifting joint rod 13 is sent to the bottom end of the non-threaded part 22 on the screw rod 32, when the lock catch hole 25 on the upper end surface of the last but one convex lifting joint rod 13 runs to the corresponding magnetic column hole 36, the magnetic column 24 in the magnetic column hole 36 is pressed into the lock catch hole 25 on the upper end of the last but one convex lifting joint rod 13 by the clamp spring 26, so that the two convex lifting joint rods 13.14 are interlocked.
The position of a transverse 60-degree open slot 39 on a self-locking bolt 17 sleeved on a running nut 16 below a penultimate convex circular lifting joint rod 12 is just moved to the position of a shifting lock nail 19 at the upper end part of a screw rod 32, at the moment, the shifting lock nail 19 on the screw rod 32 just touches a locking column 18 on the self-locking bolt 17, along with the forward rotating force of the screw rod 32, the shifting lock nail 19 buckles the locking column 18 to drive the self-locking bolt 17 to rotate forward for about 60 degrees and descend synchronously, the shifting lock nail 19 on the self-locking bolt 17 separates from the locking column 18 on the screw rod 32 along with the descending of the running nut 16, at the moment, a reverse thread 29 on the outer diameter surface of the self-locking bolt 17 is just screwed out of a reverse thread 27 part in an inner cavity at the upper end of the convex circular lifting joint rod 13, the separation of the convex circular lifting joint rod 12 and the convex circular lifting joint rod 13 is realized, and then, the steps of the convex circular lifting joint rods 10.11.12 are repeated, until the traveling nut 16 below the last convex lifting rod 10 is lowered to the bottom end position of the threaded portion 20 of the screw shaft 32.
Because of there is certain clearance each other at whole operation in-process each protruding round type lift festival pole, can produce some little rocks after rising out for this reason, utilize the inseparable cooperation of three protrusion positions 30 of each hard plastic adapter sleeve 15 medial surface and each aluminium protruding round type lift festival pole outer terminal surface to and the inseparable cooperation of three protrusion positions on hard plastic top lock ring 21 and each aluminium protruding round type lift festival pole inner chamber wall, just can eliminate above confusion completely, thereby ensured that each aluminium protruding round type lift festival pole can not produce little rocks after rising out.
When the electric screw rod is in self-locking connection with the lifting joint rods and is in a power-free condition, the manual crank device can be arranged to drive the screw rod to rotate through the gear, and if the lifting joint rods need to be lifted to a higher height, the n convex round lifting joint rods can be made of aluminum-titanium alloy, carbon fiber and other materials. When the motor is provided with an automatic remote control speed regulating circuit, the electric screw rod is connected with the lifting joint rod in a self-locking way, so that the lifting can be controlled remotely, and the lifting speed can be regulated. After the rotation signal of each circle of the screw rod is picked up from the screw rod, the lifting height can be accurately calculated and controlled through the counting circuit, and the current height is displayed through the display; meanwhile, a required height can be set at will to allow the automatic operation of the device.
Claims (2)
1. An electric screw rod self-locking connection lifting joint rod is characterized in that the upper end of a base sleeve is connected with an outermost convex round lifting joint rod which is positioned on a vertical axis together with the outermost convex round lifting joint rod, n convex round lifting joint rods which are sequentially sleeved from large to small enable a screw rod to be arranged at the central position of the axis, a convex lock-pulling nail is arranged on a screw back at the upper end of the screw rod, n diamond supporting tubes which are positioned on the same vertical axis with the screw rod and are sequentially sleeved according to the size are arranged in a hollow body of the screw rod, a bushing is tightly sleeved at the upper part and the lower part of each diamond supporting tube close to the inner wall of the screw rod, the outer diameter of the bushing keeps a gap with the inner diameter of the screw rod, and the upper end of the innermost diamond supporting tube is fixed in a supporting tube sleeve on a top platform, so that the rhombic stay tube can not rotate along with the screw rod at the same time,
except that the lower end of the outmost convex round lifting joint rod is connected with a bearing sleeve, the lower parts of the other convex round lifting joint rods are respectively connected with a running nut, the lower part of each running nut is provided with a transverse open slot which accounts for about 60 degrees of the outer diameter of the running nut, the outer diameter of the running nut is sleeved with a self-locking bolt, the inner diameter of each running nut is provided with a thread which is matched with a lead screw, the bottom slot of the thread is also provided with a thread groove so that a lock-pulling nail on the lead screw can smoothly pass through, the outer circular surface of the self-locking bolt is provided with a reverse thread which has the same thread pitch with the lead screw, a lock-combining column is embedded above the transverse open slot of 60 degrees with the running nut, the lower end of the running nut is screwed with a tightening ring to prevent the self-locking bolt from moving up and down on the,
the upper part of the innermost layer convex circular lifting joint rod is connected with a top platform, a supporting pipe sleeve is screwed on the top platform, the upper parts of the other n sections of convex circular lifting joint rods are connected with fastening sleeves, the inner diameter surface of each fastening sleeve is provided with a sealing ring clamping groove, the outer diameter surface of each fastening sleeve is provided with a clamp spring groove, a magnetic column hole is arranged in each clamp spring groove towards the axis, a magnetic column is placed in each magnetic column hole, and after the elastic clamp spring is clamped into each clamp spring groove, the magnetic column can be pressed towards the axis direction.
2. The electric screw self-locking connection lifting joint rod as claimed in claim 1, characterized in that: the convex-concave positions of the inner part and the outer part of each convex round lifting joint rod are matched with each other to play a role of a vertical orientation groove, the upper part of the inner wall of each corresponding convex round lifting joint rod is provided with a section of reverse thread with the same pitch as that of the screw rod, the outer circle side of the upper end of the corresponding convex round lifting joint rod is provided with a lock hole capable of being inserted with a magnet column, the outer circle surface of the lower end part of the corresponding convex round lifting joint rod is provided with a magnetic sheet pit, a magnet sheet is embedded in the pit, and the magnet sheet, a magnetic column hole in the fastening sleeve and the lock hole at the outer circle end of the top part of the lifting; the running nuts connected below the innermost layer of the convex round lifting pitch rods stop at the threaded part of the screw rod initially, and the running nuts connected below the other sections of the convex round lifting pitch rods stop at the unthreaded part of the screw rod.
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| CN201810633892.7A CN109110671B (en) | 2018-06-06 | 2018-06-06 | Electric screw self-locking connection lifting joint rod |
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| CN201810633892.7A CN109110671B (en) | 2018-06-06 | 2018-06-06 | Electric screw self-locking connection lifting joint rod |
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| CN109650277B (en) * | 2019-01-07 | 2023-12-19 | 铁岭长天机电有限责任公司 | Single lead screw carbon fiber mechanical lifting rod |
| CN110435553B (en) * | 2019-08-08 | 2024-09-20 | 秦致富 | Vehicle-mounted hidden type image pickup device, rearview device and automobile |
| CN111828901B (en) * | 2020-08-05 | 2022-09-02 | 深圳市朗胜光科技有限公司 | Multifunctional street lamp |
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| CN103644277B (en) * | 2013-12-01 | 2016-06-08 | 崔鲁彬 | Portable electric telescopic joint rod |
| KR101753564B1 (en) * | 2016-07-18 | 2017-07-05 | 박영희 | Workbench automatic mobile machine |
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| CN109110671A (en) | 2019-01-01 |
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