CN108466994B - Transmission device and lifting upright post - Google Patents
Transmission device and lifting upright post Download PDFInfo
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- CN108466994B CN108466994B CN201810454416.9A CN201810454416A CN108466994B CN 108466994 B CN108466994 B CN 108466994B CN 201810454416 A CN201810454416 A CN 201810454416A CN 108466994 B CN108466994 B CN 108466994B
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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
- B66F13/00—Common constructional features or accessories
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Abstract
The invention discloses a transmission device, which belongs to the field of transmission devices and comprises a hollow mandrel, wherein a transmission screw rod is arranged in the hollow mandrel, the transmission screw rod and the hollow mandrel keep synchronous rotation in the circumferential direction and are in sliding fit in the axial direction, the outer wall of the hollow mandrel is provided with external threads and is in threaded fit with a first transmission nut, the hollow mandrel is connected with a first sleeve through the first transmission nut, the transmission screw rod is in threaded fit with a second transmission nut and is connected with a second sleeve through the second transmission nut, the second transmission nut and the hollow mandrel keep relatively fixed in the axial direction and rotate relatively in the circumferential direction, and the transmission device comprises a first braking torsion spring for braking the transmission screw rod and a second braking torsion spring for braking the hollow mandrel. In addition, the invention also discloses a lifting upright post. The invention has the advantages that the self-locking force of the transmission device can be effectively improved, and the transmission is more stable.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of transmission devices, and particularly relates to a transmission device and a lifting upright post.
[ background of the invention ]
The electric lifting column is widely applied to the fields of home furnishing, medical treatment and the like, the tube body of the existing electric lifting column generally comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the inner tube, a driving device arranged in the bottom shell and a transmission device matched with the driving device in a transmission way, in order to enable the stroke of the electric lifting column to be as large as possible, the transmission device is generally provided with a transmission screw rod and a hollow screw rod which are assembled together in a complete set, and the transmission nut is respectively arranged on the inner tube and the middle tube to be matched with the transmission screw rod and the hollow screw rod, so that the relative extension and retraction of the inner tube, the middle tube and the outer tube are.
For example, the invention of chinese patent CN207016433U discloses "a retractable transmission assembly device and a lifting column", wherein a matching and connecting manner using a transmission screw and a hollow screw is disclosed in detail, but the transmission assembly device and the lifting column also have a problem of insufficient self-locking force at present, which results in that when the device is used on a lifting platform with a large load, the use requirement cannot be met.
[ summary of the invention ]
The invention aims to provide a transmission device and a lifting upright post, which can effectively improve the self-locking force of the transmission device and ensure more stable transmission.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a transmission, includes the cavity mandrel, be equipped with drive screw in the cavity mandrel, keep between drive screw and the cavity mandrel that the synchronous rotation of circumferential direction and axial direction sliding fit, cavity mandrel outer wall is equipped with external screw thread and screw-thread fit has first drive nut, and the cavity mandrel is connected with first sleeve pipe through first drive nut, drive screw-thread fit has second drive nut and is connected with the second sleeve pipe through second drive nut, second drive nut keeps axial relatively fixed and circumferential relatively rotating with the cavity mandrel, transmission includes the first braking torsional spring to the drive screw braking and the second braking torsional spring of centering hollow shaft braking.
The invention has the following beneficial effects:
1. in the traditional transmission device, in order to enable the transmission device to have certain self-locking force, a braking torsion spring is arranged on a transmission screw rod, when the transmission screw rod rotates reversely, the braking torsion spring can tightly hold the transmission screw rod to realize braking action, but the self-locking force provided by one braking torsion spring is limited, so that an additional braking torsion spring is added to the transmission device in the invention, and the braking effect is improved in a double-torsion-spring braking mode;
2. the single braking torsion spring only brakes one local position of the transmission screw when braking is achieved, however, the transmission screw and the hollow spindle are parts of a slender structure, if only one position is braked, a part far away from the position can sway to a certain degree, and the principle that the rear part of the bicycle can swing is the same as that of the bicycle when the front braking force of the bicycle is too large, so that the single braking torsion spring brakes and the stability is poor when braking, and the double torsion springs are used for braking, so that braking can be achieved on different parts to a certain degree, the braking effect is better and stable, and the sway degree of the transmission device is reduced;
3. the power transmission of the transmission device, the transmission screw rod drives the second sleeve to lift through the second transmission nut, the hollow mandrel drives the first sleeve to lift through the first transmission nut, the second transmission nut and the hollow mandrel are axially and relatively fixed and circumferentially and relatively rotate, precision errors exist in the assembling process and the manufacturing process, for example, when threaded connection is matched, although the first sleeve is meshed, a certain gap exists in the axial direction, so that when the transmission device is switched in a lifting mode, short idle load exists in the power transmission process of the transmission screw rod and the hollow shaft, and during the short idle load, the transmission screw rod and the hollow mandrel can shift to a certain degree. But if set up the braking torsional spring to drive screw, the centering hollow shaft also sets up the braking torsional spring, receives brake force simultaneously equivalently to two monomer parts, and when well hollow shaft, drive screw changed to the reversal from the corotation, two parts all can receive brake force, are equivalent to synchronous braking between the two, so the transmission is more synchronous between the two, and the probability that takes place relative motion diminishes, and stability is better, has also prolonged transmission's whole life-span simultaneously.
Preferably, the second braking torsion spring is sleeved on the hollow spindle.
Preferably, the second braking torsion spring comprises a second torsion spring main body and a second torsion spring pin, the second torsion spring main body is sleeved outside the hollow spindle, and the second torsion spring pin and the second sleeve are kept relatively fixed in the circumferential direction.
Preferably, the inner wall of the second sleeve is provided with a positioning groove, and the second torsion spring foot is clamped in the positioning groove.
Preferably, the positioning groove extends to the top of the second sleeve.
Preferably, a second shaft sleeve is arranged between the second braking torsion spring and the hollow spindle, the second shaft sleeve and the hollow spindle are circumferentially fixed, and the second braking torsion spring is sleeved on the second shaft sleeve.
Preferably, the second sleeve is sleeved outside the first sleeve, and the second braking torsion spring is positioned between the first transmission nut and the second transmission nut.
Preferably, the driving screw is mounted on a fixing plate, the first braking torsion spring includes a first torsion spring body and a first torsion spring pin, the first torsion spring body is sleeved outside the driving screw, and the first torsion spring pin is positioned on the fixing plate.
Preferably, the drive screw has a drive end which is of non-cylindrical configuration, the hollow spindle has a non-circular bore, the non-cylindrical configuration being adapted to the non-circular bore to enable the drive screw to transmit drive to the hollow spindle.
Preferably, the upper end of the hollow mandrel is fixedly sleeved with a first bearing, and the first bearing is fixedly installed on the second transmission nut.
Preferably, the first sleeve and the second sleeve are both non-circular tubes, the first transmission nut is clamped at the upper end of the first sleeve, and the second transmission nut is clamped at the upper end of the second sleeve.
In addition, the invention also discloses a lifting upright post which comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the inner tube, a driving device arranged in the bottom shell and a transmission device in transmission fit with the driving device, wherein the inner tube, the middle tube and the outer tube are sequentially sleeved from inside to outside, the bottom shell is fixedly connected with the upper end of the inner tube, the driving device is arranged in the bottom shell, the transmission device is in transmission fit with the driving device, the driving device is in transmission fit with a transmission screw rod, the lower end of the outer tube is provided with a bottom plate, the lower end of the first sleeve.
The specific technical effects of the present invention will be further explained in the detailed description.
[ description of the drawings ]
The invention is further described below in conjunction with the appended drawings and the detailed description:
FIG. 1 is an exploded view of a transmission according to one embodiment of the present invention;
FIG. 2 is a schematic view of a portion of a transmission according to an embodiment of the present invention;
FIG. 3 is a schematic view of a partial internal structure of a transmission according to an embodiment of the present invention;
FIG. 4 is a schematic view of the internal structure of the transmission according to the first embodiment of the present invention;
FIG. 5 is an exploded view of the lifting column of the second embodiment of the present invention;
fig. 6 is a sectional view of the lifting column according to the second embodiment of the present invention.
[ detailed description ] embodiments
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc., which indicate orientations or positional relationships, are used to indicate orientations or positional relationships based on the drawings, and are only used for convenience in describing embodiments and for simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
The first embodiment is as follows:
as shown in fig. 1, a transmission device includes a hollow mandrel 1, a transmission screw 2, a first sleeve 3 and a second sleeve 4, wherein an external thread 11 is provided on an outer wall of the hollow mandrel 1, the transmission screw 2 is located in the hollow mandrel 1, the transmission screw 2 has a driving end, the driving end is of a non-cylindrical structure, the hollow mandrel 1 has a non-circular inner hole, and the non-cylindrical structure is adapted to the non-circular inner hole so that the transmission screw 2 transmits a driving force to the hollow mandrel 1 to drive the hollow mandrel 1 to rotate synchronously.
Wherein, the first transmission nut 31 of first sleeve 3's upper portion fixedly connected with, external screw thread 11 and the 31 screw-thread fit of first transmission nut on the hollow mandrel 1, the second sleeve 4 suit is outside in first sleeve 3, the upper portion fixedly connected with second transmission nut 41 of second sleeve 4, drive screw 2 and the 41 screw-thread fit of second transmission nut, the connection relation between hollow mandrel 1 and the second transmission nut 41 is: the hollow spindle 1 is positioned in an axial direction with the second transmission nut 41 in a rotatable manner, i.e. the hollow spindle 1 can be rotated relative to the second transmission nut 41 but cannot be moved in an axial direction relative to the second transmission nut 41. The structure of the transmission by the transmission screw 2 and the hollow spindle 1 is disclosed in the prior art and not described too much.
In order to increase the self-locking force of the entire transmission in this embodiment, the transmission comprises a first braking torsion spring 26 braking the transmission screw 2 and a second braking torsion spring 14 braking the hollow shaft 1.
The scheme adopting the double-torsion spring brake has the advantages that:
1. in the traditional transmission device, in order to enable the transmission device to have a certain self-locking force, a braking torsion spring is arranged on a transmission screw rod 2, when the transmission screw rod 2 tends to rotate reversely, the braking torsion spring can tightly hold the transmission screw rod 2 to realize a braking effect, but the self-locking force provided by one braking torsion spring is limited, in the embodiment, an additional braking torsion spring is added to the transmission device, and the braking effect is improved in a double-torsion-spring braking mode;
2. the single braking torsion spring only brakes one local position of the transmission screw rod 2 when the braking effect is realized, however, the transmission screw rod 2 and the hollow spindle 1 are parts with a slender structure, if only one position is braked, the part far away from the position can shake to a certain degree, and the principle that the rear part of the bicycle can swing is the same when the front braking force of the bicycle is too large, so that the single braking torsion spring brakes, the stability is not good when braking, and the double torsion springs are adopted for braking, so that the braking can be realized on different positions to a certain degree, the braking effect is better and stable, and the shaking degree of the transmission device is reduced;
3. the power of the transmission device is transmitted, the transmission screw 2 drives the second sleeve 4 to lift through the second transmission nut 41, the hollow mandrel 1 drives the first sleeve 3 to lift through the first transmission nut 31, the second transmission nut 41 and the hollow mandrel 1 are axially fixed relatively and circumferentially rotate relatively, due to the precision errors existing in the assembling process and the manufacturing process, for example, when the threaded connection is matched, although the transmission is meshed, a certain gap exists in the axial direction, so that when the transmission device is switched between lifting and lowering, the power transmission process of the transmission screw rod 2 and the hollow shaft 1 has short idle load, during the short idle period, the transmission screw 2 and the hollow mandrel 1 will move to a certain extent, if only the torsion spring brake is applied to the transmission screw 2, the hollow spindle 1 is not subjected to a braking force for a short time and cannot be prevented from moving relative to each other. But if set up the braking torsional spring to transmission screw 2, centering hollow shaft 1 also sets up the braking torsional spring, receives brake force simultaneously for two monomer parts, and when well hollow shaft 1, transmission screw 2 changed from corotation to reversal, two parts all can receive brake force, are equivalent to synchronous braking between the two, so the transmission is more synchronous between the two, and the probability that takes place relative motion diminishes, and stability is better, has also prolonged transmission's whole life-span simultaneously.
The specific mounting configuration for the first and second braking torsion springs 26 and 14 is as follows:
as shown in fig. 2 to 4, in this embodiment, the second detent torsion spring 14 is preferably sleeved on the hollow spindle 1, the second detent torsion spring 14 includes a second torsion spring main body 141 and a second torsion spring pin 142, the second torsion spring main body 141 is sleeved outside the hollow spindle 1, and the second torsion spring pin 142 and the second sleeve 4 are relatively fixed in the circumferential direction.
The second torsion spring pin 142 is fixed to the second sleeve 4 in the circumferential direction, so the second torsion spring pin 142 is substantially fixed, the second torsion spring body 141 is freely sleeved on the hollow spindle 1, when the hollow spindle 1 rotates, the second torsion spring body 141 is contracted or expanded under the action of friction force, and when the second torsion spring body 141 is contracted, the hollow spindle 1 is tightly held, so that a braking effect is generated.
The connection between the second braking torsion spring 14 and the second sleeve 4 in this embodiment is specifically as follows: the inner wall of the second sleeve 4 is provided with a positioning groove 44, and the second torsion spring pin 142 is clamped in the positioning groove 44. The second torsion spring pin 142 is more convenient to assemble in a clamping manner.
Preferably, the positioning groove 44 extends to the top of the second sleeve 4, which is equivalent to the positioning groove 44 being an open slot, and the opening is located at the top end of the second sleeve 4, because the second sleeve 4 is inserted from the lower side during assembly, when the second sleeve 4 is inserted, the second torsion spring pin 142 directly aligns to and slides into the opening, and the second torsion spring pin 142 can be clamped to the positioning groove 44, so that the assembly is more convenient. Of course, in other embodiments, the structure of the positioning groove 44 is not limited to the structure of the open groove in the present embodiment.
In addition, in order to reduce the wear degree between the second drag torsion spring 14 and the hollow spindle 1, in this embodiment, a second bushing 15 is disposed between the second drag torsion spring 14 and the hollow spindle 1, the second bushing 15 and the hollow spindle 1 are circumferentially fixed, and the second drag torsion spring 14 is sleeved on the second bushing 15. The second shaft sleeve 15 can be manufactured by injection molding, after the second braking torsion spring 14 is sleeved on the second shaft sleeve 15, the friction force is mainly concentrated between the second braking torsion spring 14 and the second shaft sleeve 15, the hollow spindle 1 cannot be abraded, and the service life is longer. In this embodiment, a non-circular mounting section is provided on the hollow mandrel 1, and the cross-sectional shape of the shaft hole 151 of the second sleeve 15 matches with the cross-section of the non-circular mounting section, and the cross-section of the mounting section is preferably hexagonal.
In addition, in the embodiment, the second sleeve 4 is sleeved outside the first sleeve 3, and the first sleeve 3 is located outside the hollow spindle 1, in order to prevent the second drag torsion spring 14 from interfering with the first sleeve 3, the second drag torsion spring 14 is located between the first transmission nut 31 and the second transmission nut 41 in the embodiment, because a certain installation space exists between the first transmission nut 31 and the second transmission nut 41 in the axial direction for installing the second drag torsion spring 14, and the structures of other components are not changed. Of course, the mounting structure of the second detent torsion spring 14 is not limited to the position of the embodiment, and if the mounting structure is disposed at other positions, a through hole may be formed in the first sleeve 3 to allow the second torsion spring pin 142 of the second detent torsion spring 14 to pass through the first sleeve 3 and be connected to the second sleeve 4.
With regard to the mounting structure of the first braking torsion spring 26, the driving screw 2 is mounted on a fixing plate 97, the fixing plate 97 is mounted at a top end position of the driving screw 2, the first braking torsion spring 26 includes a first torsion spring main body and a first torsion spring pin, the first torsion spring main body is sleeved outside the driving screw 2, and the first torsion spring pin is positioned on the fixing plate 97.
Specifically, the fixing plate 97 has a protrusion 971 extending downward, the protrusion 971 is provided with a slot, the first torsion spring pin is clamped in the slot, and the first braking torsion spring 26 is installed between the second driving nut 41 and the fixing plate 97. Similarly, in order to reduce the wear between the first braking torsion spring 26 and the driving screw 2, a first bushing 25 is disposed between the first braking torsion spring 26 and the driving screw 2, and the structure of the first braking torsion spring 26 is expanded in the prior art and will not be described herein.
Other preferred structures in this embodiment are specifically as follows:
in this embodiment, the non-cylindrical structure preferably adopted by the driving end is a convex key 21 arranged at the bottom end of the driving screw 2, the non-circular inner hole is an inner hole formed by a key groove 12 arranged on the inner wall of the hollow mandrel 1, and the convex key 21 is in clamping fit with the key groove 12, so as to realize power transmission between the driving screw 2 and the hollow mandrel 1, but the non-cylindrical structure and the non-circular inner hole are not limited to this structure, and may be, for example, a D-shaped rod and a D-shaped hole, a polygonal rod and a polygonal hole, and the like, as long as the non-cylindrical structure and the non-circular inner hole capable of realizing transmission of the rotation power between the driving screw 2 and the hollow mandrel 1 are all possible, and the specific structure in this embodiment cannot.
The rotatable mode and the axial positioning are mainly realized by bearings, a first bearing 13 is fixedly sleeved at the upper end of the hollow mandrel 1, the first bearing 13 is fixedly installed on the second transmission nut 41, the specific installation structure is preferably that a step shaft is arranged on the upper end shaft surface of the hollow mandrel 1, the first bearing 13 is sleeved on the step shaft, a groove 1a is arranged on the step shaft, a clamp spring 13a is embedded in the groove 1a, the clamp spring 13a prevents the first bearing 13 from being separated from the step shaft of the hollow mandrel 1, an inner groove for installing the first bearing 13 is arranged on the inner wall of the second transmission nut 41, an installation sheet 41a is arranged below the second transmission nut 41, the installation sheet 41a is arranged below the first bearing 13, the installation sheet 41a is provided with a through hole 41b for the hollow mandrel 1 to pass through, after the first bearing 13 is arranged in the inner groove of the second transmission nut 41, the installation sheet 41a is fixedly connected with the lower end of the second transmission nut 41 by a screw 41c, at this time, the mounting piece 41a and the inner groove of the second driving nut 41 form a receiving space for the first bearing 13 to be mounted, and the mounting piece 41a serves as a support plate for the first bearing 13.
The first sleeve 3 and the second sleeve 4 are both non-circular tubes, and for convenience of processing, in this embodiment, the first sleeve 3 and the second sleeve 4 are preferably square tubes, although the first sleeve 3 and the second sleeve 4 may also be non-circular tubes with other shapes. In this embodiment, a specific clamping structure is adopted, a buckle 3a is arranged on an inner wall of an upper portion of the first sleeve 3, a buckle 4a is arranged on an inner wall of an upper portion of the second sleeve 4, a clamping groove 31a is arranged outside the first transmission nut 31, a clamping groove 411 is arranged outside the second transmission nut 41, the first transmission nut 31 is pressed into the first sleeve 3 in a rivet punching manner so that the buckle 3a is clamped and matched with the clamping groove 31a, similarly, the second transmission nut 41 is pressed into the second sleeve 4 in a rivet punching manner so that the buckle 4a is clamped and matched with the clamping groove 411, it is worth to say that the arrangement positions of the buckle 3a and the clamping groove 31a and the buckles 4a and 41a can be interchanged, that is, the upper inner wall of the first sleeve 3 and the upper inner wall of the second sleeve 4 can be provided with clamping grooves, correspondingly, the first transmission nut 31 and the second transmission nut 41 can be provided with a buckle, and the clamping function can be realized. In the present embodiment, the riveting is performed by pressing the first drive nut 31 into the first sleeve 3, the second drive nut 41 into the second sleeve 4, in the assembling process, the buckle 3a and the buckle 4a are firstly deformed, and finally, the buckle 3a is partially or completely deformed and clamped into the clamping groove 31a, the buckle 4a is partially or completely deformed and clamped into the clamping groove 411, thereby realizing the screwless assembly of the first drive nut 31 and the first sleeve 3, and the second drive nut 41 and the second sleeve 4, it is worth mentioning that the first drive nut 31 and the second drive nut 41 adopt non-circular nuts adapted to the first sleeve 3 and the second sleeve 4, since the first sleeve 3 and the second sleeve 4 are both non-circular tubes and preferably adopt square tubes, the first transmission nut 31 and the second transmission nut 41 also preferably adopt a cubic shape adapted to the square tubes.
Example two:
referring to fig. 1, 5 and 6, a lifting column includes an inner tube 5, a middle tube 6, an outer tube 7, a bottom shell 8 fixedly connected to an upper end of the inner tube 5, a driving device 9 disposed in the bottom shell 8, and a transmission device in transmission fit with the driving device 8, which are sequentially sleeved from inside to outside. The bottom shell 8 comprises a box body 81 and a box cover 82, the box cover 82 is buckled at an opening of the box body 81, so that the bottom shell 8 is provided with an accommodating space for accommodating the driving device 9, the driving device 9 is in transmission fit with the upper end of the transmission screw rod 2, the lower end of the outer tube 7 is provided with a bottom plate 71, the lower end of the first sleeve 3 is abutted to the bottom plate 71, and the second sleeve 4 drives the middle tube 6 to lift.
In this embodiment, the scheme adopted by the second sleeve 4 to drive the middle pipe 6 to ascend and descend is that a fixing block 42 is arranged on the outer wall of the lower part of the second sleeve 4, the fixing block 42 is provided with a convex edge 421 extending outwards, the convex edge 421 is located below the pipe wall of the middle pipe 6, in this embodiment, in order to facilitate the installation of the fixing block 42, the fixing block 42 is divided into two parts, the inner surface of the fixing block 42 contacting with the outer wall of the second sleeve 4 is provided with a convex column 422, the outer wall of the second sleeve 4 is provided with a through hole 43, the two fixing blocks 42 are fixedly arranged on the outer walls of the two sleeves 4 by the convex columns 422 extending into the through holes 43, when the second sleeve 4 is lifted, the middle pipe 6 can be lifted through the convex edge 421, when the second sleeve 4 is lowered, the middle pipe 6 automatically descends under the action of gravity, the structure has the advantages that the assembly of the fixing block 42 is simple and convenient, and the middle pipe 6 does not need to be particularly assembled with the fixing block 42. Of course, the lower end of the second sleeve 4 can be fixedly connected with the lower end of the middle pipe 6, and the purpose that the second sleeve 4 drives the middle pipe 6 to lift can be achieved.
The operation process of the lifting upright column is as follows: the driving device 9 drives the transmission screw rod 2 to rotate, and the transmission screw rod 2 drives the hollow mandrel 1 to synchronously rotate through the driving end when rotating. When the transmission screw rod 2 rotates, the second transmission nut 41 and the second sleeve 4 are driven to synchronously and linearly move, and the descending displacement of the second sleeve 4 relative to the transmission screw rod 2 is temporarily L1; meanwhile, when the hollow spindle 1 rotates, the first transmission nut 31 and the first sleeve 3 are driven to synchronously and linearly move, the displacement of the first sleeve 3 relative to the descending of the hollow spindle 1 is tentatively L2, which is equivalent to that when the transmission screw 2 rotates, the second sleeve 4 is driven to descend, and the first sleeve 3 is also driven to descend, and since the hollow spindle 1 and the second transmission nut 41 are axially fixed, the first sleeve 3 is displaced by L1+ L2 relative to the transmission screw 2 as a whole. The design of this kind of structure compares traditional single drive nut, and under the same prerequisite that rotates the round of drive screw, the relative displacement that first sleeve pipe 3 took place is bigger in this embodiment to realize going up and down faster effect in the unit interval.
When first sleeve pipe 3 carries out linear motion, the bottom of first sleeve pipe 3 applys thrust to bottom plate 71, because the stand stabilizer blade is connected to the bottom of the outer tube 7 of lift stand when using, and the stand stabilizer blade supports in subaerial, consequently, drive screw 2 will drive the drain pan and rise or descend, and when second sleeve pipe 4 was linear ascending motion, second sleeve pipe 4 drove well pipe 6 through protruding edge 421 and rises together, and when second sleeve pipe 4 was linear descending motion, well pipe 6 received the automatic decline of gravity influence and withdraws. That is, the outer tube 7 and the first sleeve 3 are axially fixed, the middle tube 6 and the second sleeve 4 are axially fixed, and the inner tube 5 and the drive screw 2 are axially fixed in the whole process. In this way, the function of immobilizing the outer tube 7, while the inner tube 5 and the middle tube 6 are respectively raised and lowered with respect to the outer tube 7, is achieved.
In this embodiment, the driving device 9 includes a motor 91, a worm connected to an output shaft of the motor 91, a housing 93 fixed to a housing of the motor 91, and a worm wheel disposed in the housing 93, the worm extends into the housing 93 to be in transmission fit with the worm wheel, a special-shaped hole is disposed on the worm wheel, the transmission screw 2 has an input end, the input end is configured as a special-shaped rod 22, the special-shaped rod 22 passes through the box 81 and the housing 93 to be in fit with the special-shaped hole, the special-shaped hole and the special-shaped rod 22 are non-cylindrical structures, the special-shaped hole is preferably a hexagonal hole, the special-shaped rod 22 is preferably a hexagonal rod adapted to the hexagonal hole, of course, the special-shaped hole and the special-shaped rod 22 may also be other polygonal special-shaped structures, as long as power.
In addition, the housing 93 includes an upper housing and a lower housing, the upper housing and the lower housing are fixedly assembled by the bolts 933, and the upper housing or the lower housing is fixedly connected with the motor 91 casing, which may be integrally injection-molded, so that the driving device 9 may be independently assembled in advance before the assembly of the lifting column and be installed in the bottom case 8 as an integral component without installing the motor 91 and the worm gear in the bottom case 8, respectively, thereby greatly improving the assembly efficiency of the lifting column.
The lower extreme of first sleeve pipe 3 is equipped with end cover 32, end cover 32 joint in first sleeve pipe 3's lower extreme, specifically adopt joint structure and rivet assembly method as in embodiment one, that is to say, be equipped with the buckle on first sleeve pipe 3's the lower extreme inner wall, be equipped with draw-in groove 321 on end cover 32's the outer wall, end cover 32 receives mechanical pressure to be impressed the lower extreme opening of first sleeve pipe 3, realize the joint of buckle and draw-in groove 321, of course, end cover 32's outer wall also can set up the buckle, and correspondingly, set up the draw-in groove on first sleeve pipe 3's the lower extreme inner wall, can realize end cover 32 and first sleeve pipe 3's joint equally. Finally, the end cap 32 is fixedly connected to the base plate 71 by bolts 72.
The foregoing has been a description of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary, and those skilled in the art can make various changes and modifications according to the present invention within the scope defined by the appended claims without departing from the spirit of the present invention.
Claims (12)
1. The utility model provides a transmission, includes the cavity mandrel, be equipped with drive screw in the cavity mandrel, drive screw is used for cooperating with the drive arrangement transmission, drive arrangement includes the motor, it rotates and axial direction sliding fit to keep the synchronous of circumferential direction between drive screw and the cavity mandrel, cavity mandrel outer wall is equipped with external screw thread and screw-thread fit has first drive nut, and the cavity mandrel is connected with first sleeve pipe through first drive nut, drive screw-thread fit has second drive nut and is connected with the second sleeve pipe through second drive nut, second drive nut keeps axial relatively fixed and circumference relatively rotating with the cavity mandrel, its characterized in that, transmission includes the first braking torsional spring to the drive screw braking and the second braking torsional spring of centering hollow shaft braking.
2. The transmission of claim 1, wherein the second drag torsion spring is disposed about the hollow spindle.
3. The transmission of claim 2, wherein the second detent torsion spring includes a second torsion spring body and a second torsion spring pin, the second torsion spring body is sleeved outside the hollow spindle, and the second torsion spring pin and the second sleeve are relatively fixed in the circumferential direction.
4. The transmission of claim 3, wherein the second sleeve has a detent on an inner wall thereof, and the second torsion spring pin is snap-fitted into the detent.
5. A transmission according to claim 4, wherein the locating slot extends to the top of the second sleeve.
6. The transmission of claim 3, wherein a second collar is disposed between the second drag torsion spring and the hollow spindle, the second collar and the hollow spindle being circumferentially fixed, the second drag torsion spring being sleeved on the second collar.
7. The transmission of claim 1, wherein the second sleeve is sleeved outside the first sleeve, and the second drag torsion spring is positioned between the first drive nut and the second drive nut.
8. The transmission of claim 1, wherein the drive screw is mounted to a mounting plate, and wherein the first detent torsion spring includes a first torsion spring body that fits over the drive screw and a first torsion spring pin that is positioned on the mounting plate.
9. A transmission in accordance with claim 1 wherein the drive screw has a drive end, the drive end being of non-cylindrical configuration, the hollow spindle having a non-circular internal bore, the non-cylindrical configuration being adapted to the non-circular internal bore to enable the drive screw to transmit drive to the hollow spindle.
10. A transmission in accordance with claim 1 wherein the upper end of said hollow spindle is fixedly secured to a first bearing, said first bearing being fixedly secured to a second drive nut.
11. The transmission device as claimed in claim 1, wherein the first sleeve and the second sleeve are both non-circular tubes, the first driving nut is clamped to the upper end of the first sleeve, and the second driving nut is clamped to the upper end of the second sleeve.
12. A lifting upright post comprises an inner tube, a middle tube, an outer tube, a bottom shell fixedly connected with the upper end of the inner tube, a driving device arranged in the bottom shell and a transmission device in transmission fit with the driving device, which are sequentially sleeved from inside to outside, and is characterized in that the transmission device is the transmission device in any one of claims 1 to 11, the driving device is in transmission fit with a transmission screw, a bottom plate is arranged at the lower end of the outer tube, the lower end of a first sleeve is abutted against the bottom plate, and a second sleeve drives the middle tube to lift.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454416.9A CN108466994B (en) | 2018-05-14 | 2018-05-14 | Transmission device and lifting upright post |
| PCT/CN2018/099510 WO2019218499A1 (en) | 2018-05-14 | 2018-08-09 | Transmission apparatus and lifting column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810454416.9A CN108466994B (en) | 2018-05-14 | 2018-05-14 | Transmission device and lifting upright post |
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| CN108466994A CN108466994A (en) | 2018-08-31 |
| CN108466994B true CN108466994B (en) | 2020-10-20 |
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| CN201810454416.9A Active CN108466994B (en) | 2018-05-14 | 2018-05-14 | Transmission device and lifting upright post |
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| CN (1) | CN108466994B (en) |
| WO (1) | WO2019218499A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107620B (en) * | 2019-05-06 | 2024-06-11 | 常州市凯迪电器股份有限公司 | Friction self-locking mechanism of lifting column and lifting column |
| CN110316261B (en) * | 2019-06-25 | 2021-06-25 | 浙江双友物流器械股份有限公司 | Driver of carriage layering device |
| CN110925376A (en) * | 2019-10-25 | 2020-03-27 | 宁波海仕凯驱动科技有限公司 | Transmission device with large self-locking force and electric lifting upright post |
| CN112610668A (en) * | 2020-11-20 | 2021-04-06 | 浙江捷昌线性驱动科技股份有限公司 | Transmission assembly for lifting upright post |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208532163U (en) * | 2018-05-14 | 2019-02-22 | 浙江捷昌线性驱动科技股份有限公司 | A kind of transmission device and lifting column |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2615408Y (en) * | 2003-04-11 | 2004-05-12 | 易登礼 | Double-locking, universal socket extended brace rod |
| DE102011111797B4 (en) * | 2011-08-27 | 2017-11-09 | Thyssenkrupp Marine Systems Gmbh | Submarine with a winch for a device drive |
| CN202400794U (en) * | 2011-10-28 | 2012-08-29 | 张福华 | Folding type movable lifter |
| CN204434232U (en) * | 2015-01-14 | 2015-07-01 | 广州蓝姆汽车设备有限公司 | A kind of lifting linking member catch gear |
| CN106966345A (en) * | 2017-01-10 | 2017-07-21 | 浙江捷昌线性驱动科技股份有限公司 | A kind of telescopic drive assembly device and lifting column |
| CN207016433U (en) * | 2017-01-10 | 2018-02-16 | 浙江捷昌线性驱动科技股份有限公司 | A kind of telescopic drive assembly device and lifting column |
| CN107640721B (en) * | 2017-10-30 | 2023-09-12 | 宁波天弘电力器具有限公司 | Lifting device with full-mechanical speed-changing centrifugal locking assembly |
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- 2018-08-09 WO PCT/CN2018/099510 patent/WO2019218499A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208532163U (en) * | 2018-05-14 | 2019-02-22 | 浙江捷昌线性驱动科技股份有限公司 | A kind of transmission device and lifting column |
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| Publication number | Publication date |
|---|---|
| CN108466994A (en) | 2018-08-31 |
| WO2019218499A1 (en) | 2019-11-21 |
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