WO2024055693A1 - 升降立柱的传动总成及升降立柱 - Google Patents

升降立柱的传动总成及升降立柱 Download PDF

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Publication number
WO2024055693A1
WO2024055693A1 PCT/CN2023/103788 CN2023103788W WO2024055693A1 WO 2024055693 A1 WO2024055693 A1 WO 2024055693A1 CN 2023103788 W CN2023103788 W CN 2023103788W WO 2024055693 A1 WO2024055693 A1 WO 2024055693A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw rod
sleeve
transmission assembly
lifting column
connecting piece
Prior art date
Application number
PCT/CN2023/103788
Other languages
English (en)
French (fr)
Inventor
李威强
王政方
李占元
Original Assignee
浙江捷昌线性驱动科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江捷昌线性驱动科技股份有限公司 filed Critical 浙江捷昌线性驱动科技股份有限公司
Publication of WO2024055693A1 publication Critical patent/WO2024055693A1/zh

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Classifications

    • 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
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types

Definitions

  • the present invention relates to the field of linear actuators, and in particular to a transmission assembly of a lifting column and a lifting column.
  • the lifting column can drive components to perform lifting movements.
  • the existing planetary gear set is used to transmit power to drive the sleeve and the screw rod telescopic transmission assembly.
  • the planetary gear set includes a planetary gear carrier and a Planetary gear.
  • the action of the planetary gear drives the rotation of the planetary gear carrier to drive the main shaft to rotate.
  • the main shaft is a screw rod or a sleeve, and the main shaft and the planetary gear carrier are splined.
  • other screw rods or sleeves are arranged outside the main shaft.
  • the rotation of the main shaft can drive the outer sleeves or screw rods to expand and contract relative to the main shaft.
  • the transmission of power is from the inside to the outside, resulting in poor smoothness of the lifting movement of the transmission assembly.
  • the technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and propose a transmission assembly for a lifting column, thereby solving the problem of poor stability during the telescopic movement of the transmission assembly.
  • the present invention adopts the following technical solutions:
  • the transmission assembly of the lifting column includes a driving device, a first casing, and a second casing arranged in the first casing.
  • the second casing is provided with a first screw rod and a second screw rod.
  • the transmission assembly also includes a planetary gear set that is in transmission cooperation with the drive shaft of the driving device.
  • the planetary gear set includes planetary gears and an outer ring gear meshed with the planetary gears.
  • the first sleeve is connected to the outer ring gear.
  • the ring gear transmission cooperates, the first sleeve and the second sleeve can rotate synchronously, the first sleeve and the second sleeve can relatively expand and contract along the axial direction, and the second sleeve Both ends are threadedly connected to the first screw rod and the second screw rod respectively.
  • the first sleeve is sleeved on the outside of the outer ring gear, and the outer ring of the outer ring gear is spline-fitted with the inner wall of the first sleeve.
  • one of the external gear ring and the first sleeve is provided with a clamping block, and the other is provided with a clamping groove.
  • the clamping slot cooperates with the clamping block to secure the external gear ring.
  • the ring is fixed on the first sleeve.
  • the outer ring gear is provided with a plug-in slot, and the first sleeve is inserted into the plug-in slot and splined with the inner wall of the plug-in slot.
  • the planetary gear set further includes a planetary gear carrier and a fixed shaft installed on the planetary gear carrier.
  • the planetary gears are rotatably installed on the fixed shaft.
  • the planetary gear carrier is provided with There is a connecting piece that limits the axial position of the planet wheel.
  • the connecting piece and the planet carrier are connected through fasteners, and the fasteners penetrate the connecting piece and then are locked to the fixed shaft to install the connecting piece on the on the planet wheel carrier; or, the connecting piece and the planet wheel carrier are connected by fasteners, the planet wheel carrier is provided with a connecting column, and the fasteners penetrate the connecting piece and then are locked to on the connecting post to install the connecting piece on the planet carrier.
  • one end of the external ring gear offsets the planet gear carrier, and the other end of the external ring gear offsets the connecting piece.
  • the planetary gear set further includes a planetary gear carrier.
  • the planetary gear carrier is provided with a connecting piece.
  • the planetary gear and the external ring gear are located between the connecting piece and the planetary gear carrier.
  • the first screw rod is connected to the connecting piece, and the second screw rod can expand and contract along the axial direction relative to the first screw rod.
  • the connecting piece is provided with a first limiting portion
  • the first screw rod is provided with a second limiting portion
  • the connecting piece forms an insertion interface
  • the first screw rod is inserted into into the insertion port, so that the first limiting part cooperates with the second limiting part to keep the first screw rod and the connecting piece relatively stationary.
  • the connecting member is a plate body, and one end of the first screw rod connected to the connecting member extends outward in the radial direction to form a flange that matches the edge of the plate body, so One end of the external ring gear offsets the planet gear carrier, and the other end of the external gear gear offsets the flange.
  • the second screw rod can telescope relative to the first screw rod, a first nut is threaded on the first screw rod, and the second sleeve is connected to the first nut. , the first nut is splined with the first sleeve to drive the second sleeve to expand and contract relative to the first sleeve.
  • the second screw rod is located in the first screw rod, the second screw rod extends out of the first screw rod, and the second sleeve pipe and the first sleeve pipe Spline fit, the end of the second sleeve is installed with a second nut that cooperates with the second screw to drive the second screw relative to the first
  • the screw rod is telescopic.
  • the second screw rod is sleeved outside the first screw rod, the second sleeve pipe is splined with the first sleeve pipe, and the end of the second sleeve pipe is installed
  • a second nut cooperates with the second screw rod to drive the second screw rod to expand and contract relative to the first screw rod.
  • the driving device includes a housing and a motor arranged in the housing.
  • the axis line of the output shaft of the motor is parallel to the axis line of the first sleeve.
  • the lifting column includes an inner tube fixed to the driving device, a middle pipe sleeved outside the inner pipe, an outer pipe sleeved outside the middle pipe, and a transmission assembly of the lifting column disclosed in any of the above technical solutions.
  • the outer tube is installed on the first screw rod or the second screw rod
  • the middle tube is installed on the second casing and rotates with the second casing.
  • the transmission assembly disclosed in the present invention is applied to the lifting column and is used to realize the lifting movement of the lifting column.
  • the driving device When the driving device is started, it can provide power to drive the planetary gear to rotate.
  • the planetary gear drives the outer ring gear to rotate.
  • the outer ring gear drives the first casing.
  • the first casing drives the second casing to drive the second casing to rotate.
  • the second casing drives the second casing to rotate.
  • the tube has axial displacement by cooperating with the threads of the first screw rod and the second screw rod, and also drives one of the first screw rod and the second screw rod to move axially.
  • the power of the driving device can be transmitted from the inside to the outside to the outer ring gear to drive the outermost first sleeve to rotate.
  • the first sleeve transmits the power from the outside to the inside to make the transmission assembly lift. More stable.
  • the planetary gear carrier is usually driven to rotate by driving the planetary gear to rotate.
  • a power output structure is provided on the planetary carrier. The screw rod or sleeve cooperates with the output structure to drive the screw rod and sleeve to expand and contract through the planetary gear carrier.
  • the planet gear carrier remains in a fixed state, the driving device drives the planet gear to rotate, and the planet gear drives the outer ring gear to rotate, so as to increase the torque transmitted by the outer ring gear to the first sleeve and improve the transmission.
  • Load performance of the assembly due to the higher torque, the instantaneous current of the driving device will be smaller when the lifting column is started, reducing the probability of failure of the driving device due to excessive instantaneous current.
  • first sleeve is sleeved on the outside of the outer ring gear, and the outer ring of the outer ring gear is spline-fitted with the inner wall of the first sleeve.
  • the first sleeve is installed outside the outer ring gear to shorten the distance between the first sleeve and the outer ring gear, thereby shortening the installation distance and reducing the length of the transmission assembly.
  • first set The contact area between the tube and the external ring gear has been increased, and the matching strength between the two has been improved, making the transmission more stable.
  • connection structure is used to connect with the first sleeve and the external ring gear respectively to transmit power, then The connection structure between the first bushing and the outer ring gear may be damaged under excessive load.
  • the spline fit also allows the first bushing to be fitted outside the outer ring gear, and the outer ring gear can transmit power to the first bushing.
  • one of the outer gear ring and the first sleeve is provided with a clamping block, and the other is provided with a clamping groove, and the clamping groove cooperates with the clamping block to fix the outer gear ring on the first sleeve.
  • the cooperation between the clamping block and the clamping groove can limit the axial displacement of the first sleeve relative to the outer gear ring, so as to prevent the first sleeve from moving relative to the outer gear ring and disengaging from the cooperation, resulting in interruption of power transmission.
  • the outer ring gear is provided with a plug-in slot, and the first sleeve is inserted into the plug-in slot and splined with the inner wall of the plug-in slot.
  • the first sleeve is inserted into the insertion slot to increase the contact area between the first sleeve and the outer ring gear, thereby improving the matching strength.
  • the size of the first sleeve is smaller than the size of the outer ring gear, thereby reducing the size of the transmission assembly. radial size.
  • the planetary gear set also includes a planetary gear carrier and a fixed shaft installed on the planetary gear carrier.
  • the planetary gears are rotatably installed on the fixed shaft.
  • the planetary gear carrier is provided with a pair of The connecting piece for planet wheel axial limit.
  • the planet wheel is installed on the fixed shaft to rotate relative to the planet wheel carrier under the drive of the driving device.
  • the connector installed on the planet wheel carrier can limit the axial position of the planet wheel to avoid axial displacement of the planet wheel during the transmission process. Affects the meshing transmission between the planetary gear and the external ring gear.
  • one end of the external ring gear offsets the planet gear carrier, and the other end of the external ring gear offsets the connecting member.
  • the connecting piece and the planet carrier can limit the axial position of the outer ring gear to avoid axial displacement of the outer ring gear to ensure the stability during the transmission process.
  • the connecting piece's position limiting of the planet gear, the outer ring gear and During the transmission process the planetary gears remain relatively stationary in the axial direction to avoid wear of the teeth on the outer ring gear and planetary gears and affect the transmission efficiency.
  • the planetary gear set further includes a planetary gear carrier, the planetary gear carrier is provided with a connecting piece, the planetary gear and the external ring gear are located between the connecting piece and the planetary gear carrier, so
  • the first screw rod is connected to the connecting piece, and the second screw rod can expand and contract along the axial direction relative to the first screw rod.
  • the connecting piece is installed on the planet gear carrier and remains fixed to the planet gear frame.
  • the first screw rod is connected to the connecting piece and can be fixed to the connecting piece.
  • the thread cooperation between the first screw rods will not drive the position change of the first screw rod, so that the second sleeve can expand and contract relative to the first screw rod, and at the same time, through the thread cooperation with the second screw rod, drive the second screw rod.
  • the rod moves relative to the first screw rod.
  • the connecting piece is provided with a first limiting portion
  • the first screw is provided with a second limiting portion
  • the connecting piece forms a plug interface
  • the first screw is inserted into the plug.
  • the first limiting part cooperates with the second limiting part to keep the first screw rod and the connecting piece relatively stationary.
  • the first screw rod can remain stationary with the connecting piece through the cooperation of the first limiting part and the second limiting part, and will not cause axial rotation or axial movement with the movement of the second screw rod.
  • the plug-in interface is used for inserting the first screw rod to facilitate the alignment of the first limiting part and the second limiting part, thereby improving assembly efficiency and reducing assembly difficulty.
  • the connecting member is a plate body, and one end of the first screw rod connected to the connecting member extends outward in the radial direction to form a flange that matches the edge of the plate body, and the external ring gear One end of the outer ring gear is against the planet carrier, and the other end of the external ring gear is against the flange.
  • the flange surrounds the connecting piece so that the first screw rod and the connecting piece can remain relatively fixed, so that the first screw rod and the connecting piece remain relatively stationary during expansion and contraction of the transmission assembly.
  • the flange protrudes from the edge of the plate body in the radial direction, and can also offset the external ring gear to axially limit the external ring gear, preventing the external ring gear from axial displacement during the transmission process and affecting the transmission.
  • the second screw rod is telescopic relative to the first screw rod, a first nut is threaded on the first screw rod, and the second sleeve is connected to the first nut.
  • a nut is splined with the first sleeve to drive the second sleeve to expand and contract relative to the first sleeve.
  • the first sleeve drives the first nut to rotate synchronously through spline cooperation with the first nut.
  • the first nut moves in the axial direction along the first screw through thread cooperation with the first screw to push the second sleeve.
  • the tube telescopes relative to the first sleeve.
  • the second screw rod is located in the first screw rod, the second screw rod extends out of the first screw rod, and the second sleeve is splined with the first sleeve,
  • a second nut that cooperates with the second screw rod is installed on the end of the second sleeve to drive the second screw rod to expand and contract relative to the first screw rod.
  • the spline fit between the second casing and the first casing allows the second casing and the first casing to rotate synchronously.
  • the second casing and the first casing have a large contact area and high matching strength. The torque at the position where the second sleeve is connected to the first nut can be reduced. When the second sleeve moves, it can drive the second nut to move synchronously.
  • the second nut cooperates with the thread of the second screw, so that the second nut can drive the second screw to move along the axial direction.
  • the second screw rod will be connected to the external component to drive the component up and down. Under the restriction of the external component, the rotation of the second screw rod is limited. In this way, the second nut will also rotate relative to the second screw rod to drive the second screw rod.
  • the second nut moves in the axial direction, so that the movement speed of the second screw rod is higher than the movement speed of the second sleeve. Neither the first screw rod nor the second screw rod needs to rotate, so there is no need to install bearings inside, which reduces costs.
  • the second screw rod is sleeved outside the first screw rod,
  • the second sleeve is spline-fitted with the first sleeve, and the end of the second sleeve is installed with a second nut that matches the second screw to drive the second screw relative to the second screw.
  • the first screw rod expands and contracts.
  • the driving device includes a housing and a motor disposed in the housing.
  • the axis of the output shaft of the motor is parallel to the axis of the first sleeve.
  • a planetary reduction wheel set that is matched with the output shaft for transmission.
  • the transmission assembly of this application is a transmission assembly in a straight column.
  • Figure 1 is a schematic structural diagram of the transmission assembly in the embodiment of the present invention.
  • Figure 2 is a cross-sectional view of the transmission assembly in the embodiment of the present invention.
  • Figure 3 is an exploded view of the transmission assembly in the embodiment of the present invention.
  • Figure 4 is an enlarged schematic diagram of position A in Figure 2;
  • Figure 5 is a schematic structural diagram of the connecting piece and the planetary gear set in the embodiment of the present invention.
  • Figure 6 is an enlarged schematic diagram of position B in Figure 3;
  • Figure 7 is a schematic structural diagram of another first screw rod and connecting piece in an embodiment of the present invention.
  • Figure 8 is an exploded view of the flipped transmission assembly in the embodiment of the present invention.
  • Figure 9 is a schematic structural diagram of a lifting column in an embodiment of the present invention.
  • Figure 10 is a schematic structural diagram of the lifting column during the lifting movement in the embodiment of the present invention.
  • Driving device 100 housing 101, motor 102, planetary reduction gear set 103, first sleeve 110, second sleeve 120, first screw 130, clamp 131, flange 132, second screw 140, balance piece 141.
  • first nut 150, second nut 160 Planetary gear set 200, planetary gear carrier 210, connecting column 211, fixed shaft 220, planetary gear 230, external ring gear 240, clamping groove 241;
  • Fasteners 400 Inner tube 500, middle tube 510, and outer tube 520.
  • an embodiment of the present invention discloses a transmission assembly of a lifting column, including a driving device 100, a first casing 110, a second casing 120 disposed in the first casing 110, and a second casing 120. 120 is provided with a first screw 130 and a second screw 140.
  • the transmission assembly also includes a planetary gear set 200 that is transmission matched with the drive shaft of the driving device 100.
  • the planetary gear set 200 includes a planetary gear carrier 210, a The fixed shaft 220 on the frame 210, the planet wheel 230 rotatably installed on the fixed shaft 220 and the external ring gear 240 meshing with the planet wheel 230, the first sleeve 110 and the external ring gear 240 are in driving cooperation, and the first sleeve 110 and The second sleeve 120 can rotate synchronously.
  • the second sleeve 120 can move along the axial direction relative to the first sleeve 110. Both ends of the second sleeve 120 are threaded with the first screw 130 and the second screw 140 respectively. connected to drive the second screw rod 140 to move along the axial direction relative to the first screw rod 130 .
  • the transmission assembly disclosed in the present invention is applied to the lifting column and is used to realize the lifting movement of the lifting column.
  • the driving device 100 can provide power to drive the planetary gear 230 to rotate.
  • the planetary gear 230 drives the external ring gear 240 to rotate.
  • the external ring gear 240 drives the first sleeve 110 and the first sleeve 110 drives the second sleeve 120 .
  • the second sleeve 120 has axial displacement by cooperating with the threads of the first screw 130 and the second screw 140, and also drives the first screw 130 and the second screw 140.
  • One of the screws 140 moves axially.
  • the power of the driving device 100 can be transmitted from the inside to the outside to the outer ring gear 240, so as to drive the outermost first sleeve 110 to rotate through the outer ring gear 240.
  • the first sleeve 110 transfers the power from the outside to the outside.
  • the planetary gear 230 is usually driven to rotate to drive the planetary gear carrier 210 to rotate.
  • a power output structure is provided on the planetary gear carrier 210.
  • the screw rod or sleeve cooperates with the output structure to drive the screw rod through the planetary gear carrier 210. , the casing expands and contracts.
  • the planet wheel carrier 210 remains in a fixed state.
  • the output shaft of the driving device 100 penetrates the planet wheel carrier 210 and engages with the planet wheel 230 to drive the planet wheel 230 to rotate.
  • the planet wheel 230 then drives the planet wheel 230 .
  • the external ring gear 240 rotates to increase the torque transmitted by the external ring gear 240 to the first sleeve 110 and improve the load performance of the transmission assembly.
  • the instantaneous current of the driving device 100 will be smaller, which reduces the probability of the driving device 100 malfunctioning due to excessive instantaneous current.
  • the transmission cooperation between the first sleeve 110 and the outer ring gear 240 can be driven by direct contact between the two, or the power can be transmitted to the first sleeve 110 through an additional transmission structure.
  • the first sleeve 110 is set outside the outer ring gear 240 , and the outer ring of the outer ring gear 240 is spline-fitted with the inner wall of the first sleeve 110 .
  • the first sleeve 110 is installed outside the outer ring gear 240 to shorten the distance between the first sleeve 110 and the outer ring gear 240, thereby shortening the installation distance and reducing the length of the transmission assembly.
  • the contact area between the first sleeve 110 and the outer ring gear 240 is also increased, and the matching strength between the two is improved, making the transmission more stable. If a connecting structure is used to connect the first sleeve and the outer ring gear respectively to transmit power, the connecting structure between the first sleeve and the outer ring gear may be damaged when the load is too large.
  • the spline fitting method also allows the first sleeve 110 to be installed outside the outer ring gear 240, and the outer ring gear 240 can transmit power to the first sleeve 110.
  • a plug-in slot can also be provided on the outer ring gear 240, and the first sleeve 110 is inserted into the slot and splined with the inner wall of the slot.
  • the contact area of the ring gear 240 improves the mating strength.
  • the size of the first sleeve 110 is smaller than the size of the outer ring gear 240, so that the radial size of the transmission assembly can be reduced.
  • the planet gear carrier 210 is also provided with a connecting piece 300.
  • the connecting piece 300 can limit the axial position of the planet gear 230 to avoid axial displacement of the planet gear 230 during the transmission process and affect the planet gear 230 and the external ring gear 240. The meshing transmission between them.
  • the connecting member 300 and the planet gear carrier 210 can limit the axial position of the external ring gear 240 to prevent the external ring gear 240 from appearing.
  • the axial displacement is to ensure the stability during the transmission process, and at the same time, it cooperates with the limitation of the planet wheel 230 by the connecting piece 300, so that the external ring gear 240 and the planet wheel 230 remain relatively stationary in the axial direction during the transmission process. To prevent the teeth on the external ring gear 240 and the planet gear 230 from wearing and affecting the transmission efficiency.
  • the axial positions of the first sleeve 110 and the first screw rod 130 remain unchanged. While the first sleeve 110 is splined with the external ring gear 240, the external ring gear 240 can also limit the first sleeve 110 in the axial direction.
  • One of the external ring gear 240 and the first sleeve 110 is provided with a clamping block. 131. The other one is provided with a clamping slot 241.
  • the clamping slot 241 cooperates with the clamping block 131 to fix the external ring gear 240 on the first sleeve 110. The cooperation between the clamping block 131 and the clamping slot 241 can restrict the first sleeve 110 from facing each other.
  • the axial displacement of the external ring gear 240 is to prevent the first sleeve 110 from moving relative to the external ring gear 240 and disengaging, resulting in interruption of power transmission.
  • the first screw rod 130 is connected to the connecting member 300 and remains relatively stationary with the connecting member 300 .
  • the mating structure of the first screw 130 and the connector 300 is disclosed.
  • the connecting piece 300 is provided with a first limiting portion, and the first screw rod 130 is provided with a second limiting portion that cooperates with the first limiting portion to keep the first screw rod 130 and the connecting piece 300 relatively stationary.
  • the connector 300 includes a plate body 310 and a surrounding edge 320 extending from the periphery of the plate body 310 along the axial direction of the first screw rod 130.
  • the surrounding edge 320 surrounds an insertion port 330 for the first screw rod 130 to be inserted, and a first limiter. is disposed on the rim 320.
  • the first limiting part includes a notch 340 and a limiting block 350
  • the second limiting part includes a protruding block 360 and a limiting groove 370
  • the protruding block 360 cooperates with the notch 340
  • the limiting block 350 cooperates with the limiting groove 370 to limit Circumferential rotation and axial displacement of the first screw rod 130 relative to the connecting member 300 .
  • the notch 340 extends from the insertion interface 330 toward the plate body 310 and is open at one end, so that the circumferential edge 320 does not need to be deformed and the limiting block 350 can be directly inserted into the notch 340 during the insertion process of the first screw rod 130 .
  • the notch 340 is provided along the axial direction of the first screw rod 130.
  • the side walls of the notch 340 in the circumferential direction of the first screw rod 130 can resist the protrusion 360 to limit the circumferential movement of the protrusion 360 relative to the notch 340, thereby The rotation of the first screw rod 130 relative to the connecting member 300 is restricted.
  • the remaining positions of the insertion port 330 can offset the bump 360 to limit the insertion of the first screw rod 130 , thereby reducing the difficulty of assembling the bump 360 and the notch 340 .
  • the limiting block 350 protrudes from the inner wall of the surrounding edge 320, but the inner diameter of the surrounding edge 320 minus twice the thickness of the limiting block 350 is also greater than the outer diameter of the first screw rod 130. In this way, the limiting block 350 does not It will block the first screw rod 130 from being inserted into the insertion port 330 .
  • the bump 360 and the notch 340 Under the cooperative action of the bump 360 and the notch 340, it has a positioning effect on the first screw rod 130, so that after the first screw rod 130 is inserted into the insertion port 330, the limiting block 350 can be opposite to the limiting groove 370, and the bending circumference
  • the inner wall of the edge 320 allows the limit block 350 to move toward the limit groove 370 and gradually snap into the limit groove 370 to achieve a riveting effect, thereby limiting the axial direction of the first screw 130 relative to the connecting piece 300 Displacement.
  • the connecting piece 300 is a metal component. After the surrounding edge 320 is bent, it can maintain the bent state and keep the limiting block 350 in the limiting groove 370 to maintain the stability between the first screw rod 130 and the connecting piece 300 .
  • the limiting groove 370 is provided along the circumferential direction of the first screw rod 130 , so that the limiting groove 370 has a larger size in the circumferential direction of the first screw rod 130 .
  • the limit block 350 moves toward the axis of the first screw 130.
  • the limit block 350 will deviate from the axis of the first screw 130, but the larger size limit groove 370 can The occurrence of assembly errors is allowed, the cooperation between the limit block 350 and the limit groove 370 is facilitated, and the manufacturing accuracy requirements for the limit block 350 and the limit groove 370 are reduced.
  • a plurality of limiting blocks 350 are provided on the surrounding edge 320, and at least two groups of bumps 360 and notches 340 are provided.
  • a limiting groove 370 is provided between the two connecting bumps 360.
  • the limiting grooves 370 are One end is connected to the bump 360, and the other end of the limiting groove 370 is connected to another notch 340. In this way, there is no need to separately provide a limiting groove 370 corresponding to the position of each limiting block 350 on the first screw rod 130. , which can not only improve the assembly efficiency, but also facilitate the manufacturing of the first screw 130 .
  • the setting positions of the bumps and notches, the limit blocks and the limit grooves can also be interchanged, that is, the bumps and the limit grooves are set on the surrounding edge, and the bumps and the limit blocks are set on the first screw rod. .
  • a through hole 380 is provided on the edge 320, between the through hole 380 and the insertion interface 330
  • the area is the bending section 390
  • the limiting block 350 is provided on the bending section 390.
  • the bending section 390 is bent to make the limiting block 350 cooperate with the limiting groove 370.
  • the rigidity of the area where the through hole 380 is provided on the rim 320 is weakened, making it easier for the bending section 390 to bend relative to the plate body 310.
  • the area where the bending section 390 is bent on the rim 320 can also be limited to ensure that the bending section After 390 is bent, the limiting block 350 can cooperate with the limiting groove 370 .
  • the surrounding edge 320 is also provided with a protruding structure below the bending section 390, which can offset the circumferential side wall of the first screw rod 130 and maintain the first screw rod 130.
  • the stability on the connecting piece 300 prevents relative shaking between the two.
  • the bending portions on both sides of the notch 340 are also easier to bend because of the notch 340 .
  • grooves can also be provided on the surrounding edge 320 to weaken the rigidity of the surrounding edge 320 .
  • the first limiting part and the second limiting part are fixedly matched to keep the first screw rod and the connecting piece relatively stationary, and the fixed fit is screw connection, plug connection, One of riveting and snap connections.
  • the first limiting part is a locking piece provided on the surrounding edge, and the second limiting part is a screw hole. The locking piece is locked into the screw hole to simultaneously limit the circumferential rotation and axial rotation of the first screw rod relative to the connecting piece 300. Displacement.
  • the connector 300 includes a plate body 310, the first limiting part is a flange 301 protruding outward from the periphery, and the second limiting part is The flange 132 extends from the first screw rod 130 and surrounds the flange 301 to limit the circumferential rotation and axial displacement of the first screw rod 130 relative to the connecting member 300 .
  • the connecting member 300 is first produced, and then the first screw rod 130 is formed on the connecting member 300 by injection molding.
  • the flange 132 protrudes from the edge of the plate body 310 in the radial direction, and can also offset the external ring gear 240 to axially limit the external ring gear 240 to avoid axial displacement of the external ring gear 240 during the transmission process. Affect transmission.
  • this method can realize the relative stationarity of the first screw rod 130 and the connecting member 300, the production process is complicated and is not conducive to implementation. However, it is also an embodiment of the present application.
  • the first screw is a plastic screw, which can be formed by injection molding.
  • the first screw needs to be connected to the connecting piece, and the first screw needs to be connected to the connecting piece by injection molding. It is easier to form a complex matching structure to facilitate mass production of the first screw, and the second limiting portion of the obtained first screw has high manufacturing precision to facilitate cooperation with the first limiting portion.
  • the mating structure of the connecting piece 300 and the planet carrier 210 is disclosed.
  • the connecting piece 300 is connected to the planet carrier 210 through a fastener 400.
  • the planet carrier 210 is provided with a connecting column 211.
  • the fastener 400 penetrates the connecting piece 300 and is then locked to the connecting column 211 to install the connecting piece 300 on the planet.
  • the position of the connecting column 211 can be set according to the part that needs to be fixed on the connecting piece 300, so that the design can be based on the actual structure of the lifting column.
  • There are multiple connecting posts 211 and the fasteners 400 connect different parts of the connecting piece 300 to the connecting posts 211 , thereby improving the matching strength between the connecting piece 300 and the planetary gear carrier 210 , so that the connecting piece 300 and the planetary gear carrier 210 are connected.
  • the wheel carrier 210 remains relatively stationary.
  • this embodiment also discloses another solution, in which the fastener penetrates the connecting piece and is then locked to the fixed shaft to install the connecting piece on the planet carrier.
  • the matching structure of the second sleeve 120 and the first screw 130 and the second screw 140 is disclosed.
  • the first nut 150 is threadedly mounted on the first screw rod 130 .
  • the second sleeve 120 is connected to the first nut 150 .
  • the first nut 150 is spline-fitted with the first sleeve 110 to drive the second sleeve 120 relative to the first nut 150 .
  • the sleeve 110 is telescopic.
  • the first sleeve 110 drives the first nut 150 to rotate synchronously through spline cooperation with the first nut 150.
  • the first nut 150 moves in the axial direction along the first screw 130 through thread cooperation with the first screw rod 130. , to push the second sleeve 120 to expand and contract relative to the first sleeve 110 .
  • the second screw rod 140 is located in the first screw rod 130.
  • the second screw rod 140 extends out of the first screw rod 130.
  • the second sleeve 120 is spline-fitted with the first sleeve 110.
  • the end of the second sleeve 120 is installed.
  • the second nut 160 cooperates with the second screw rod 140 to drive the second screw rod 140 to expand and contract relative to the first screw rod 130 .
  • the spline fit between the second sleeve 120 and the first sleeve 110 allows the second sleeve 120 and the first sleeve 110 to rotate synchronously.
  • the contact area of the second sleeve 120 and the first sleeve 110 is It is large and has high matching strength, which can reduce the torque at the connection position between the second sleeve 120 and the first nut 150 .
  • the second sleeve 120 moves, it can drive the second nut 160 to move synchronously.
  • the second nut 160 cooperates with the thread of the second screw rod 140 so that the second nut 160 can drive the second screw rod 140 to move along the axial direction.
  • the second screw rod 140 will be connected with the external component to drive the component to lift. Under the restriction of the external component, the rotation of the second screw rod 140 is restricted, so that the second nut 160 will also rotate relative to the second screw.
  • the rod 140 rotates to drive the second screw rod 140 to move along the axial direction relative to the second nut 160, so that the movement speed of the second screw rod 140 is higher than the movement speed of the second sleeve 120. Neither the first screw rod 130 nor the second screw rod 140 needs to rotate, so there is no need to install bearings inside, which reduces costs.
  • a balance member 141 may also be provided at one end of the second screw rod 140 facing the connecting hole. The balance member 141 slides and cooperates with the inner wall of the first screw rod 130 to stabilize the end of the second screw rod 140 and reduce the relative friction between the second screw rod 140 and the second screw rod 140 . The shaking occurs during the movement of the first screw 130.
  • the transmission assembly of this application can be installed either directly or upside down.
  • the second screw rod 140 is sleeved outside the first screw rod 130
  • the second sleeve 120 is spline-fitted with the first sleeve 110
  • the end of the second sleeve 120 is installed with the second screw rod 130.
  • the second nut 160 is matched with the screw rod 140 to drive the second screw rod 140 to expand and contract relative to the first screw rod 130 .
  • the drive device 100 includes a housing 101 and a motor 102 disposed in the housing 101.
  • the output shaft of the drive device 100 directly drives the motor 102.
  • the planetary gear set 200 does not have a deceleration function.
  • a planetary reduction gear set 103 is provided in the housing 101 to reduce the output speed of the motor 102 and prevent the transmission assembly from lifting too fast.
  • the number of planetary reduction gear sets 103 can be arranged according to actual conditions.
  • the axis centerline of the output shaft of the motor 102 is parallel to the axis centerline of the first sleeve 110, and the transmission assembly of the present application is a transmission assembly in a straight column.
  • the axis centerline of the output shaft of the motor 102 and the axis centerline of the first sleeve 110 are preferably in a coincidence state, but due to the existence of processing errors, it is difficult to achieve a coincidence state.
  • the present invention also discloses a lifting column, which includes an inner tube 400 that is fixed to the driving device 100, a middle tube 410 that is placed outside the inner tube 400, an outer tube 420 that is placed outside the middle tube 410, and the above-mentioned
  • the outer tube 420 is installed on the second screw rod 140
  • the middle tube 410 is installed on the second sleeve 120 and rotates with the second sleeve 120 .
  • the second sleeve 120 can drive the middle tube 410 to perform lifting movements, and the first screw rod 130 can drive the outer tube 420 to perform lifting movements.
  • the transmission assembly of the present application is adopted, so that the lifting movement of the lifting column is smooth and can withstand Larger complex.

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Abstract

升降立柱的传动总成，属于线性致动器领域，包括驱动装置（100）、第一套管（110）、设置于第一套管（110）内的第二套管（120），第二套管（120）内设有第一丝杆（130）和第二丝杆（140），还包括与驱动装置（100）的驱动轴传动配合的行星轮组（200），行星轮组（200）包括行星轮（230）和与行星轮（230）啮合的外齿圈（240），第一套管（110）与外齿圈（240）传动配合，第一套管（110）与第二套管（120）可同步旋转，第一套管（110）与第二套管（120）可沿着轴向相对伸缩，第二套管（120）的两端分别与第一丝杆（130）和第二丝杆（140）螺纹传动连接，解决了传动总成伸缩运动过程中平稳性较差的问题。还涉及一种升降立柱。

Description

升降立柱的传动总成及升降立柱 【技术领域】
本发明涉及线性致动器领域，尤其涉及升降立柱的传动总成及升降立柱。
【背景技术】
升降立柱能够驱动部件做升降运动，升降立柱内部具有传动总成，现有的采用了行星轮组来传递动力驱动套管、丝杆伸缩的传动总成，通常其行星轮组包括行星轮架和行星轮，传动时行星轮动作驱动行星轮架转动以驱动主轴转动，主轴为丝杆或套管，主轴与行星轮架之间为花键配合。在三节立柱中，主轴外侧还会设置其他的丝杆或套管，传动时，主轴转动能够驱动外侧的套管或丝杆相对主轴伸缩。动力的传递是由内向外的，导致传动总成升降运动的平稳度较差。
【发明内容】
本发明所要解决的技术问题在于克服现有技术的不足而提出升降立柱的传动总成，解决了传动总成伸缩运动过程中平稳性较差的问题。
为解决上述技术问题，本发明采用如下技术方案：
升降立柱的传动总成，包括驱动装置、第一套管、设置于所述第一套管内的第二套管，所述第二套管内设有第一丝杆和第二丝杆，所述传动总成还包括与所述驱动装置的驱动轴传动配合的行星轮组，所述行星轮组包括行星轮和与所述行星轮啮合的外齿圈，所述第一套管与所述外齿圈传动配合，所述第一套管与所述第二套管可同步旋转，所述第一套管与所述第二套管可沿着轴向相对伸缩，所述第二套管的两端分别与第一丝杆和第二丝杆螺纹传动连接。
在上述方案的基础上，所述第一套管套装于所述外齿圈的外侧，所述外齿圈的外圈与所述第一套管的内壁花键配合。
在上述方案的基础上，所述外齿圈与所述第一套管的其中一个设有卡块，另一个设有卡槽，所述卡槽与所述卡块配合以将所述外齿圈固定在所述第一套管上。
在上述方案的基础上，所述外齿圈上设有插接槽，所述第一套管插装至所述插接槽内并与所述插接槽内壁花键配合。
在上述方案的基础上，所述行星轮组还包括行星轮架和安装在所述行星轮架上的固定轴，所述行星轮转动安装在所述固定轴上，所述行星轮架上设有对所述行星轮轴向限位的连接件。
在上述方案的基础上，所述连接件与所述行星轮架通过紧固件连接，所述紧固件贯穿所述连接件后锁紧至所述固定轴上以将所述连接件安装在所述行星轮架上；或者，所述连接件与所述行星轮架通过紧固件连接，所述行星轮架上设有连接柱，所述紧固件贯穿所述连接件后锁紧至所述连接柱上以将所述连接件安装在所述行星轮架上。
在上述方案的基础上，所述外齿圈的一端与所述行星轮架相抵，所述外齿圈的另一端与所述连接件相抵。
在上述方案的基础上，所述行星轮组还包括行星轮架，所述行星轮架上设有连接件，所述行星轮和所述外齿圈位于所述连接件和所述行星轮架之间，所述第一丝杆连接所述连接件，所述第二丝杆可相对所述第一丝杆沿着轴向伸缩。
在上述方案的基础上，所述连接件上设有第一限位部，所述第一丝杆上设有第二限位部，所述连接件形成插接口，所述第一丝杆插入至所述插接口内，以使所述第一限位部与所述第二限位部配合保持第一丝杆和连接件的相对静止。
在上述方案的基础上，所述连接件为板体，所述第一丝杆与所述连接件连接的一端在径向方向上向外延伸形成与所述板体边缘配合的翻边，所述外齿圈的一端与所述行星轮架相抵，所述外齿圈的另一端与所述翻边相抵。
在上述方案的基础上，所述第二丝杆可相对所述第一丝杆伸缩，所述第一丝杆上螺纹配合安装第一螺母，所述第二套管与所述第一螺母相连，所述第一螺母与所述第一套管花键配合，以驱动所述第二套管相对所述第一套管伸缩。
在上述方案的基础上，所述第二丝杆位于所述第一丝杆内，所述第二丝杆伸出所述第一丝杆，所述第二套管与所述第一套管花键配合，所述第二套管的端部安装与所述第二丝杆配合的第二螺母，以驱动所述第二丝杆相对所述第一 丝杆伸缩。
在上述方案的基础上，所述第二丝杆套装在所述第一丝杆外，所述第二套管与所述第一套管花键配合，所述第二套管的端部安装与所述第二丝杆配合的第二螺母，以驱动所述第二丝杆相对所述第一丝杆伸缩。
在上述方案的基础上，所述驱动装置包括外壳和设置于所述外壳内的电机，所述电机的输出轴的轴心线和所述第一套管的轴心线平行，所述外壳内设有至少一组与所述输出轴传动配合的行星减速轮组。
升降立柱，包括与所述驱动装置保持固定的内管、套装在所述内管外的中管、套装在所述中管外的外管和上述任一技术方案公开的升降立柱的传动总成，所述外管安装在所述第一丝杆或所述第二丝杆上，所述中管安装在所述第二套管上且与所述第二套管转动配合。
本发明的有益效果：
本发明公开的传动总成应用于升降立柱上，用于实现升降立柱的升降运动。驱动装置启动时能够提供动力以驱动行星轮转动，行星轮带动外齿圈转动，外齿圈带动第一套管，第一套管带动第二套管以驱动第二套管转动，第二套管转动过程中通过与第一丝杆、第二丝杆的螺纹配合而具有轴向位移，同时还带动第一丝杆、第二丝杆中的一个进行轴向移动。
通过行星轮组，可以将驱动装置的动力自内向外传递至外齿圈上，以带动最外侧的第一套管转动，第一套管将动力自外向内传递，以使传动总成升降过程更加平稳。现有技术中，通常通过驱动行星轮转动以带动行星轮架转动，行星轮架上会设置动力输出结构，丝杆或套管与输出结构配合，以通过行星轮架驱动丝杆、套管伸缩，与现有技术不同，本申请中行星轮架保持固定状态，驱动装置驱动行星轮转动，行星轮再驱动外齿圈转动，以提高外齿圈向第一套管传递的扭矩，提高了传动总成的负载性能。此外，由于更加的扭矩，升降立柱启动时，驱动装置的瞬时电流也会更小，降低了驱动装置因瞬时电流过大而出现故障的概率。
进一步的，所述第一套管套装于所述外齿圈的外侧，所述外齿圈的外圈与所述第一套管的内壁花键配合。第一套管套装在外齿圈外以缩短第一套管与外齿圈之间的间距，从而能够缩短安装距离而缩小传动总成的长度。此外第一套 管与外齿圈之间的接触面积得到了增加，二者之间的配合强度得到了提升，使传动更加平稳，若是采用连接结构分别与第一套管和外齿圈连接来传递动力，则可能会在负载过大的情况下出现第一套管与外齿圈之间的连接结构损坏的情况。而花键配合的方式，也使第一套管只需要套装在外齿圈外后，外齿圈便能够将动力传递至第一套管上。
进一步的，所述外齿圈与所述第一套管的其中一个设有卡块，另一个设有卡槽，所述卡槽与所述卡块配合以将所述外齿圈固定在所述第一套管上。卡块与卡槽的配合能够限制第一套管相对外齿圈的轴向位移，以避免第一套管相对外齿圈移动而脱离配合，导致动力传递中断。
进一步的，所述外齿圈上设有插接槽，所述第一套管插装至所述插接槽内并与所述插接槽内壁花键配合。第一套管插入至插接槽内而提高了第一套管与外齿圈的接触面积，从而提高了配合强度，第一套管的尺寸小于外齿圈的尺寸，从而能够缩小传动总成的径向尺寸。
进一步的，所述行星轮组还包括行星轮架和安装在所述行星轮架上的固定轴，所述行星轮转动安装在所述固定轴上，所述行星轮架上设有对所述行星轮轴向限位的连接件。行星轮安装在固定轴以在驱动装置的驱动下相对行星轮架转动，安装在行星轮架上的连接件能够对行星轮进行轴向限位而避免行星轮在传动过程中出现轴向位移，影响行星轮与外齿圈之间的啮合传动。
进一步的，所述外齿圈的一端与所述行星轮架相抵，所述外齿圈的另一端与所述连接件相抵。连接件和行星轮架能够对外齿圈轴向限位而避免外齿圈出现轴向位移，以保证传动过程中的稳定性，同时配合连接件对行星轮的限位，而使外齿圈和行星轮在传动过程中二者在轴向方向上保持相对静止，以避免外齿圈、行星轮上的齿出现磨损而影响传动效率。
进一步的，所述行星轮组还包括行星轮架，所述行星轮架上设有连接件，所述行星轮和所述外齿圈位于所述连接件和所述行星轮架之间，所述第一丝杆连接所述连接件，所述第二丝杆可相对所述第一丝杆沿着轴向伸缩。连接件安装在行星轮架上与行星轮架保持固定，第一丝杆与连接件相连而能够与连接件保持固定，第二套管在被第一套管带动转动时，第二套管与第一丝杆之间的螺纹配合不会驱动第一丝杆出现位置变化，以使第二套管能够相对第一丝杆伸缩，并同时通过与第二丝杆的螺纹配合，驱动第二丝杆相对第一丝杆活动。
进一步的，所述连接件上设有第一限位部，所述第一丝杆上设有第二限位部，所述连接件形成插接口，所述第一丝杆插入至所述插接口内，以使所述第一限位部与所述第二限位部配合保持第一丝杆和连接件的相对静止。第一丝杆能够通过第一限位部与第二限位部的配合而与连接件保持静止，不会随着第二丝杆的动作出现轴向转动或轴向运动。插接口供第一丝杆插入，以方便对准第一限位部与第二限位部，提高装配效率，降低装配难度。
进一步的，所述连接件为板体，所述第一丝杆与所述连接件连接的一端在径向方向上向外延伸形成与所述板体边缘配合的翻边，所述外齿圈的一端与所述行星轮架相抵，所述外齿圈的另一端与所述翻边相抵。翻边包绕连接件，以使第一丝杆能与连接件保持相对固定，从而在传动总成伸缩过程中第一丝杆和连接件保持相对静止。翻边在径向方向上凸出于板体的边缘，还能够与外齿圈相抵而对外齿圈进行轴向限位，避免外齿圈在传动过程中出现轴向位移而影响传动。
进一步的，所述第二丝杆可相对所述第一丝杆伸缩，所述第一丝杆上螺纹配合安装第一螺母，所述第二套管与所述第一螺母相连，所述第一螺母与所述第一套管花键配合，以驱动所述第二套管相对所述第一套管伸缩。第一套管通过与第一螺母的花键配合带动第一螺母同步转动，第一螺母通过与第一丝杆的螺纹配合，沿着第一丝杆在轴向上运动，以推动第二套管相对第一套管伸缩。
进一步的，所述第二丝杆位于所述第一丝杆内，所述第二丝杆伸出所述第一丝杆，所述第二套管与所述第一套管花键配合，所述第二套管的端部安装与所述第二丝杆配合的第二螺母，以驱动所述第二丝杆相对所述第一丝杆伸缩。第二套管与第一套管之间的花键配合，使得第二套管与第一套管之间可以同步转动，第二套管与第一套管的接触面积大、配合强度高，可以减小第二套管与第一螺母相连位置处受到的扭矩。第二套管在运动时可以带动第二螺母同步运动，第二螺母与第二丝杆的螺纹配合，使得第二螺母能够带动第二丝杆一同沿着轴向运动，而在升降立柱上，第二丝杆会与外部部件相连以驱动部件升降，在外部部件的限制下第二丝杆的转动受到限制，这样一来第二螺母还会相对第二丝杆转动，以驱动第二丝杆相对第二螺母沿着轴向运动，从而使第二丝杆的运动速度高于第二套管的运动速度。第一丝杆和第二丝杆均不需要转动，从而不需要在内部设置轴承，降低了成本。
本申请还公开了另一技术方案，即，所述第二丝杆套装在所述第一丝杆外， 所述第二套管与所述第一套管花键配合，所述第二套管的端部安装与所述第二丝杆配合的第二螺母，以驱动所述第二丝杆相对所述第一丝杆伸缩。
进一步的，所述驱动装置包括外壳和设置于所述外壳内的电机，所述电机的输出轴的轴心线和所述第一套管的轴心线平行，所述外壳内设有至少一组与所述输出轴传动配合的行星减速轮组。本申请的传动总成为直筒立柱内的传动总成。通过设置行星减速轮组，可以降低电机输出的转速避免伸缩速度过快，同时可以提高输出的扭矩，提高升降立柱的负载能力。
本发明的这些特点和优点将会在下面的具体实施方式、附图中详细的揭露。
【附图说明】
下面结合附图对本发明做进一步的说明：
图1为本发明实施例中传动总成的结构示意图；
图2为本发明实施例中传动总成的剖视图；
图3为本发明实施例中传动总成的爆炸图；
图4为图2中A处的放大示意图；
图5为本发明实施例中连接件与行星轮组的结构示意图；
图6为图3中B处的放大示意图；
图7为本发明实施例中另一种第一丝杆与连接件的结构示意图；
图8为本发明实施例中倒装的传动总成的爆炸图；
图9为本发明实施例中升降立柱的结构示意图；
图10为本发明实施例中升降立柱升降运动过程中的结构示意图。
附图标记：
驱动装置100、外壳101、电机102、行星减速轮组103、第一套管110、第
二套管120、第一丝杆130、卡块131、翻边132、第二丝杆140、平衡件141、 第一螺母150、第二螺母160；
行星轮组200、行星轮架210、连接柱211、固定轴220、行星轮230、外齿
圈240、卡槽241；
连接件300、凸缘301、板体310、围边320、插接口330、缺口340、限位
块350、凸块360、限位槽370、通孔380、折弯段390；
紧固件400；
内管500、中管510、外管520。
【具体实施方式】
下面结合本发明实施例的附图对本发明实施例的技术方案进行解释和说明，但下述实施例仅为本发明的优选实施例，并非全部。基于实施方式中的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得其他实施例，都属于本发明的保护范围。
下文中出现的诸如“示例性”“一些实施例”等词意为“用作例子、实施例或说明性”，作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。为了更好的说明本发明，在下文的具体实施方式中给出了众多的具体细节，本领域技术人员应当理解，没有某些具体细节，本公开同样可以实施。
参照图1至图6，本发明实施例公开了升降立柱的传动总成，包括驱动装置100、第一套管110、设置于第一套管110内的第二套管120，第二套管120内设有第一丝杆130和第二丝杆140，传动总成还包括与驱动装置100的驱动轴传动配合的行星轮组200，行星轮组200包括行星轮架210、设置在行星轮架210上的固定轴220、转动安装在固定轴220上的行星轮230和与行星轮230啮合的外齿圈240，第一套管110与外齿圈240传动配合，第一套管110与第二套管120可同步旋转，第二套管120可相对第一套管110沿着轴向活动，第二套管120的两端分别与第一丝杆130和第二丝杆140螺纹传动连接，以驱动第二丝杆140相对第一丝杆130沿着轴向活动。
本发明公开的传动总成应用于升降立柱上，用于实现升降立柱的升降运动。驱动装置100启动时能够提供动力以驱动行星轮230转动，行星轮230带动外齿圈240转动，外齿圈240带动第一套管110，第一套管110带动第二套管120 以驱动第二套管120转动，第二套管120转动过程中通过与第一丝杆130、第二丝杆140的螺纹配合而具有轴向位移，同时还带动第一丝杆130、第二丝杆140中的一个进行轴向移动。
通过行星轮组200，可以将驱动装置100的动力自内向外传递至外齿圈240上，以通过外齿圈240带动最外侧的第一套管110转动，第一套管110将动力自外向内传递，以使传动总成升降过程更加平稳。现有技术中，通常通过驱动行星轮230转动以带动行星轮架210转动，行星轮架210上会设置动力输出结构，丝杆或套管与输出结构配合，以通过行星轮架210驱动丝杆、套管伸缩，与现有技术不同，本申请中行星轮架210保持固定状态，驱动装置100的输出轴贯穿行星轮架210与行星轮230啮合而驱动行星轮230转动，行星轮230再驱动外齿圈240转动，以提高外齿圈240向第一套管110传递的扭矩，提高了传动总成的负载性能。此外，由于更加的扭矩，升降立柱启动时，驱动装置100的瞬时电流也会更小，降低了驱动装置100因瞬时电流过大而出现故障的概率。
第一套管110与外齿圈240之间的传动配合，可以是二者之间的直接接触进行传动，也可以通过额外的传动结构将动力传递至第一套管110上，作为优选的，第一套管110套装在外齿圈240外侧，外齿圈240的外圈与第一套管110的内壁花键配合。第一套管110套装在外齿圈240外以缩短第一套管110与外齿圈240之间的间距，从而能够缩短安装距离而缩小传动总成的长度。第一套管110与外齿圈240之间的接触面积也得到了增加，二者之间的配合强度得到了提升，使传动更加平稳。若是采用连接结构分别与第一套管和外齿圈连接来传递动力，则可能会在负载过大的情况下出现第一套管与外齿圈之间的连接结构损坏的情况。而花键配合的方式，也使第一套管110只需要套装在外齿圈240外后，外齿圈240便能够将动力传递至第一套管110上。
此外，也可以在外齿圈240上设置插接槽，第一套管110插装至插接槽内并与插接槽内壁花键配合，通过这样的方式也可以提高第一套管110与外齿圈240的接触面积而提高配合强度，第一套管110的尺寸小于外齿圈240的尺寸，从而能够缩小传动总成的径向尺寸。但若升降立柱本身体积较大，或极小，外齿圈240上设置插接槽会削弱外齿圈240的强度，容易在遇到较大的负载时，因扭矩过大而导致外齿圈240变形。
行星轮架210上还设有连接件300，连接件300能够对行星轮230轴向限位，而避免行星轮230在传动过程中出现轴向位移，影响行星轮230与外齿圈240 之间的啮合传动。
外齿圈240的一端与行星轮架210相抵，外齿圈240的另一端与连接件300相抵，连接件300和行星轮架210能够对外齿圈240轴向限位而避免外齿圈240出现轴向位移，以保证传动过程中的稳定性，同时配合连接件300对行星轮230的限位，而使外齿圈240和行星轮230在传动过程中二者在轴向方向上保持相对静止，以避免外齿圈240、行星轮230上的齿出现磨损而影响传动效率。
传动过程中第一套管110和第一丝杆130的轴向位置不变。第一套管110与外齿圈240花键配合的同时，外齿圈240还能够对第一套管110轴向限位，外齿圈240与第一套管110的其中一个设有卡块131，另一个设有卡槽241，卡槽241与卡块131配合以将外齿圈240固定在第一套管110上，卡块131与卡槽241的配合能够限制第一套管110相对外齿圈240的轴向位移，以避免第一套管110相对外齿圈240移动而脱离配合，导致动力传递中断。第一丝杆130则与连接件300相连，而保持与连接件300的相对静止。
参照图4至图6，在本发明的一个实施例中，公开了第一丝杆130与连接件300的配合结构。
连接件300上设有第一限位部，第一丝杆130上设有与第一限位部配合以使第一丝杆130和连接件300保持相对静止的第二限位部。连接件300包括板体310和自板体310周缘沿第一丝杆130的轴向延伸形成的围边320，围边320围成供第一丝杆130插入的插接口330，第一限位部设置在围边320上，第一丝杆130与连接件300配合时，第一丝杆130的一端插入至插接口330内而与围边320上的第一限位部配合，围边320和由围边320围成的插接口330对第一丝杆130具有定位作用，以方便第一限位部和第二限位部的配合。
第一限位部包括缺口340和限位块350，第二限位部包括凸块360和限位槽370，凸块360与缺口340配合、限位块350与限位槽370配合，以限制第一丝杆130相对连接件300的周向转动和轴向位移。
具体的，缺口340自插接口330向板体310方向延伸形成，其一端敞开，以使围边320不需要形变便能够在第一丝杆130插入过程中使限位块350直接插入至缺口340内，缺口340沿第一丝杆130轴向方向设置，缺口340在第一丝杆130周向方向上的侧壁能够与凸块360相抵而限制凸块360相对缺口340的周向运动，从而限制了第一丝杆130相对连接件300的转动。配合过程中， 插接口330的其余位置能够与凸块360相抵而限制第一丝杆130的插入，降低了凸块360与缺口340的装配难度。
限位块350凸出于围边320的内壁，但围边320的内径尺寸减去两倍于限位块350的厚度也大于第一丝杆130的外径，这样一来限位块350不会阻挡第一丝杆130向插接口330内的插入。在凸块360和缺口340配合作用下，对第一丝杆130具有定位作用，使得第一丝杆130在插入插接口330内后，限位块350能与限位槽370相对，弯折围边320的内壁以使限位块350朝向限位槽370方向活动，并逐渐卡入至限位槽370内，达到了铆接的效果，从而限制了第一丝杆130相对连接件300的轴向位移。连接件300为金属构件，围边320被弯折后便能够保持折弯的状态而将限位块350保持在限位槽370内，维持第一丝杆130与连接件300之间的稳定性。
作为优选的，限位槽370沿第一丝杆130周向方向设置，以使限位槽370在第一丝杆130周向方向上具有较大的尺寸，在弯折围边320的过程中，无法保证限位块350朝向第一丝杆130轴心线方向运动，实际装配过程中，限位块350会偏离第一丝杆130的轴心线，但较大尺寸的限位槽370能够允许装配误差的出现，方便限位块350与限位槽370的配合，降低了对限位块350、限位槽370的制造精度要求。此外，在围边320上设置有多个限位块350，凸块360和缺口340的数量也设置有至少两组，相连两个凸块360之间设有限位槽370，限位槽370的一端与其中凸块360相连，限位槽370的另一端与另一个缺口340相连，这样一来不需要在第一丝杆130上对应每个限位块350的位置单独设置一个限位槽370，既能够提高装配效率，又方便了第一丝杆130的制造。
凸块和缺口的设置位置、限位块和限位槽的设置位置也可以互相对换，即凸块和限位槽设置在围边上，凸块和限位块设置在第一丝杆上。
参照图5和图6，为了提高限位块350与限位槽370的装配效率，在本发明的一个实施例中，围边320上设置有通孔380，通孔380与插接口330之间的区域为折弯段390，限位块350设置在折弯段390上，在装配时弯折折弯段390以使限位块350与限位槽370配合。
围边320上设置了通孔380的区域刚性被削弱，使折弯段390相对板体310易于弯折，此外还可以限定围边320上折弯段390弯折的区域，以保证折弯段390弯折后，限位块350能与限位槽370配合。围边320上位于折弯段390下方也设有凸出的结构，能够与第一丝杆130的周向侧壁相抵，而维持第一丝杆130 在连接件300上的稳定性，避免二者之间出现相对晃动。另外在缺口340两侧的折弯部也因设置了缺口340而更易于折弯。此外，也可以在围边320上设置凹槽来削弱围边320刚性。
在本发明的一个实施例中，与上述实施例不同，第一限位部和第二限位部固定配合以使第一丝杆与连接件保持相对静止，固定配合为螺钉连接、插接、铆接、卡扣连接中的一种。第一限位部为设置在围边上的锁定件，第二限位部为螺钉孔，锁定件锁定到螺钉孔内，以同时限制第一丝杆相对连接件300的周向转动和轴向位移。
参照图7，在本发明的一个实施例中，与上述实施例不同，连接件300包括板体310，第一限位部为自周缘向外凸出的凸缘301，第二限位部为自第一丝杆130上延伸形成的翻边132，翻边132包绕凸缘301，以限制第一丝杆130相对连接件300的周向转动和轴向位移。在制造时，先生产连接件300，再通过注塑的方式在连接件300上成型第一丝杆130。翻边132在径向方向上凸出于板体310的边缘，还能够与外齿圈240相抵而对外齿圈240进行轴向限位，避免外齿圈240在传动过程中出现轴向位移而影响传动。这种方式虽然可以实现第一丝杆130和连接件300的相对静止，但生产过程复杂，不利于实施，但也为本申请的一种实施例。
在本发明的一个实施例中，基于上述实施例，第一丝杆,为塑料丝杆，可以通过注塑的方式成型，第一丝杆需要与连接件相连，通过注塑的方式在第一丝杆上成型复杂的配合结构较为容易，以方便大批量生产第一丝杆，并且得到的第一丝杆上第二限位部的制造精度较高，以方便与第一限位部的配合。
参照图5，在本发明的一个实施例中，公开了连接件300与行星轮架210的配合结构。
连接件300与行星轮架210通过紧固件400连接，行星轮架210上设有连接柱211，紧固件400贯穿连接件300后锁紧至连接柱211上以将连接件300安装在行星轮架210上。连接柱211的位置可以根据连接件300上需要固定的部位进行设置，从而能够根据升降立柱的实际结构进行设计。连接柱211的数量设有多个，紧固件400将连接件300的不同部位与连接柱211连接，提高了连接件300与行星轮架210之间的配合强度，以使连接件300与行星轮架210保持相对静止。
参照图，本实施例还公开了另一种方案，紧固件贯穿连接件后锁紧至固定轴上以将连接件安装在行星轮架上。
参照图3，基于上述实施例，在本发明的一个实施例中，公开了第二套管120与第一丝杆130、第二丝杆140的配合结构。
第一丝杆130上螺纹配合安装第一螺母150，第二套管120与第一螺母150相连，第一螺母150与第一套管110花键配合，以驱动第二套管120相对第一套管110伸缩。第一套管110通过与第一螺母150的花键配合带动第一螺母150同步转动，第一螺母150通过与第一丝杆130的螺纹配合，沿着第一丝杆130在轴向上运动，以推动第二套管120相对第一套管110伸缩。
第二丝杆140位于第一丝杆130内，第二丝杆140伸出第一丝杆130，第二套管120与第一套管110花键配合，第二套管120的端部安装与第二丝杆140配合的第二螺母160，以驱动第二丝杆140相对第一丝杆130伸缩。第二套管120与第一套管110之间的花键配合，使得第二套管120与第一套管110之间可以同步转动，第二套管120与第一套管110的接触面积大、配合强度高，可以减小第二套管120与第一螺母150相连位置处受到的扭矩。第二套管120在运动时可以带动第二螺母160同步运动，第二螺母160与第二丝杆140的螺纹配合，使得第二螺母160能够带动第二丝杆140一同沿着轴向运动，而在升降立柱上，第二丝杆140会与外部部件相连以驱动部件升降，在外部部件的限制下第二丝杆140的转动受到限制，这样一来第二螺母160还会相对第二丝杆140转动，以驱动第二丝杆140相对第二螺母160沿着轴向运动，从而使第二丝杆140的运动速度高于第二套管120的运动速度。第一丝杆130和第二丝杆140均不需要转动，从而不需要在内部设置轴承，降低了成本。第二丝杆140朝向连接孔的一端还可以设置平衡件141，平衡件141与第一丝杆130的内壁滑动配合，以对第二丝杆140端部进行稳定，减少第二丝杆140相对第一丝杆130活动过程中出现的晃动。
本申请的传动总成，既可以正装也可以倒装。当倒装时，参照图8，第二丝杆140套装在第一丝杆130外，第二套管120与第一套管110花键配合，第二套管120的端部安装与第二丝杆140配合的第二螺母160，以驱动第二丝杆140相对第一丝杆130伸缩。
参照图2，在本发明的一个实施例中，驱动装置100包括外壳101和设置于外壳101内的电机102，在行星轮组200中，驱动装置100的输出轴直接驱动行 星轮230，因此行星轮组200不具备减速的功能，为此在外壳101内设置有行星减速轮组103，用于降低电机102的输出转速，避免传动总成升降速度过快。行星减速轮组103的数量可以根据实际情况进行布置。此外，电机102输出轴的轴心线和第一套管110的轴心线平行，本申请的传动总成为直筒立柱内的传动总成。电机102输出轴的轴心线和第一套管110的轴心线优选为重合状态，但由于加工误差的存在，很难做到重合状态。
参照图9和图10，本发明还公开了升降立柱，包括与驱动装置100保持固定的内管400、套装在内管400外的中管410、套装在中管410外的外管420和上述任意技术方案中公开的传动总成，外管420安装在第二丝杆140上，中管410安装在第二套管120上且与第二套管120转动配合。
第二套管120能够带动中管410做升降运动，第一丝杆130能够带动外管420做升降运动，采用了本申请的传动总成，使得升降立柱的升降运动平顺度好，且能够承受较大的复杂。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，熟悉该本领域的技术人员应该明白本发明包括但不限于附图和上面具体实施方式中描述的内容。任何不偏离本发明的功能和结构原理的修改都将包括在权利要求书的范围中。

Claims (15)

  1. 升降立柱的传动总成，包括驱动装置、第一套管、设置于所述第一套管内的第二套管，所述第二套管内设有第一丝杆和第二丝杆，其特征在于，所述传动总成还包括与所述驱动装置的驱动轴传动配合的行星轮组，所述行星轮组包括行星轮和与所述行星轮啮合的外齿圈，所述第一套管与所述外齿圈传动配合，所述第一套管与所述第二套管可同步旋转，所述第一套管与所述第二套管可沿着轴向相对伸缩，所述第二套管的两端分别与第一丝杆和第二丝杆螺纹传动连接。
  2. 根据权利要求1所述的升降立柱的传动总成，其特征在于，所述第一套管套装于所述外齿圈的外侧，所述外齿圈的外圈与所述第一套管的内壁花键配合。
  3. 根据权利要求2所述的升降立柱的传动总成，其特征在于，所述外齿圈与所述第一套管的其中一个设有卡块，另一个设有卡槽，所述卡槽与所述卡块配合以将所述外齿圈固定在所述第一套管上。
  4. 根据权利要求1所述的升降立柱的传动总成，其特征在于，所述外齿圈上设有插接槽，所述第一套管插装至所述插接槽内并与所述插接槽内壁花键配合。
  5. 根据权利要求1所述的升降立柱的传动总成，其特征在于，所述行星轮组还包括行星轮架和安装在所述行星轮架上的固定轴，所述行星轮转动安装在所述固定轴上，所述行星轮架上设有对所述行星轮轴向限位的连接件。
  6. 根据权利要求5所述的升降立柱的传动总成，其特征在于，所述连接件与所述行星轮架通过紧固件连接，所述紧固件贯穿所述连接件后锁紧至所述固定轴上以将所述连接件安装在所述行星轮架上；或者，所述连接件与所述行星轮架通过紧固件连接，所述行星轮架上设有连接柱，所述紧固件贯穿所述连接件后锁紧至所述连接柱上以将所述连接件安装在所述行星轮架上。
  7. 根据权利要求5所述的升降立柱的传动总成，其特征在于，所述外齿圈的一端与所述行星轮架相抵，所述外齿圈的另一端与所述连接件相抵。
  8. 根据权利要求1所述的升降立柱的传动总成，其特征在于，所述行星轮组还包括行星轮架，所述行星轮架上设有连接件，所述行星轮和所述外齿圈位于所述连接件和所述行星轮架之间，所述第一丝杆连接所述连接件，所述第二丝杆可相对所述第一丝杆沿着轴向伸缩。
  9. 根据权利要求8所述的升降立柱的传动总成，其特征在于，所述连接件上设有第一限位部，所述第一丝杆上设有第二限位部，所述连接件形成插接口，所述第一丝杆插入至所述插接口内，以使所述第一限位部与所述第二限位部配合保持第一丝杆和连接件的相对静止。
  10. 根据权利要求8所述的升降立柱的传动总成，其特征在于，所述连接件为板体，所述第一丝杆与所述连接件连接的一端在径向方向上向外延伸形成与所述板体边缘配合的翻边，所述外齿圈的一端与所述行星轮架相抵，所述外齿圈的另一端与所述翻边相抵。
  11. 根据权利要求1至10中任一项所述的升降立柱的传动总成，其特征在于，所述第二丝杆可相对所述第一丝杆伸缩，所述第一丝杆上螺纹配合安装第一螺母，所述第二套管与所述第一螺母相连，所述第一螺母与所述第一套管花键配合，以驱动所述第二套管相对所述第一套管伸缩。
  12. 根据权利要求11所述的升降立柱的传动总成，其特征在于，所述第二丝杆位于所述第一丝杆内，所述第二丝杆伸出所述第一丝杆，所述第二套管与所述第一套管花键配合，所述第二套管的端部安装与所述第二丝杆配合的第二螺母，以驱动所述第二丝杆相对所述第一丝杆伸缩。
  13. 根据权利要求10所述的升降立柱的传动总成，其特征在于，所述第二丝杆套装在所述第一丝杆外，所述第二套管与所述第一套管花键配合，所述第二套管的端部安装与所述第二丝杆配合的第二螺母，以驱动所述第二丝杆相对所述第一丝杆伸缩。
  14. 根据权利要求1至10中任一项所述的升降立柱的传动总成，其特征在于， 所述驱动装置包括外壳和设置于所述外壳内的电机，所述电机的输出轴的轴心线和所述第一套管的轴心线平行，所述外壳内设有至少一组与所述输出轴传动配合的行星减速轮组。
  15. 升降立柱，其特征在于，包括权利要求1至14中任一项所述的升降立柱的传动总成、与所述驱动装置保持固定的内管、套装在所述内管外的中管和套装在所述中管外的外管，所述外管安装在所述第一丝杆或所述第二丝杆上，所述中管安装在所述第二套管上且与所述第二套管转动配合。
PCT/CN2023/103788 2022-09-14 2023-06-29 升降立柱的传动总成及升降立柱 WO2024055693A1 (zh)

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