A modular lifting chair and working method thereof

Abstract

The present invention relates to a modular lifting chair and a working method thereof, comprising a chair body module, handle modules are respectively arranged on both sides of the front of the chair body module, a base module connected to the chair body via a lifting rod module is arranged on the lower side of the chair body module, a connecting rod transmission mechanism for driving the lifting rod module is installed on the base module, the lifting rod module comprises a vertically arranged screw rod, a transmission structure is installed on the bare rod at the lower part of the screw rod, the transmission structure is inserted into a base jack arranged on the base module and connected with the connecting rod transmission mechanism, a fixed pipe assembly for connecting with the base jack is sleeved on the screw rod, a lifting nut screwed with the screw rod is arranged at the upper end of the fixed pipe assembly, a movable pipe assembly fixedly connected with the lifting nut is arranged on the outer sleeve of the fixed pipe assembly, the chair body module and the handle module are installed on the movable pipe assembly, and the upper end of the screw rod is fixedly connected with a sliding assembly rotatably connected with the inner wall of the movable pipe assembly. The lifting chair is easy to carry, replace, maintain and accommodate.

Description

Technical Field

[0001] The invention relates to a modular lifting chair and a working method thereof. Background Art

[0002] With the development of an aging society in China, elderly care equipment has developed rapidly, and facilities and equipment such as elderly care chairs, wheelchairs, infusion chairs, and transfer chairs have emerged.

[0003] At present, most of the above-mentioned equipment on the market are assembled and transported in one piece, which cannot be disassembled and assembled in a modular manner, and are not easy to carry, replace and store. For the above-mentioned equipment that requires lightness, easy to carry, and convenient parts replacement, especially equipment such as multi-functional nursing chairs, which are elderly care equipment that needs to be frequently switched between different spaces outdoors or indoors, an integrated structure that is difficult to carry and store is obviously not suitable. Summary of the invention

[0004] The object of the present invention is to provide a modular lifting chair and a working method thereof, wherein the lifting chair is easy to carry, replace, maintain and store.

[0005] The technical solution of the present invention is: a modular lifting chair, including a chair body module, handle modules are respectively arranged on both sides of the front of the chair body module, a base module connected to the chair body via a lifting rod module is arranged on the lower side of the chair body module, and a connecting rod transmission mechanism for driving the lifting rod module is installed on the base module.

[0006] Furthermore, the chair body module is a centrally symmetrical structure and consists of two chair body frame units, a butterfly lock is fixed to the rear of the chair body frame unit on one side, a slider and a limit column matching the butterfly lock are fixed to the rear of the other chair body frame unit, and the fronts of the two chair body frame units are connected to the base module via lifting rod modules respectively.

[0007] Furthermore, the lifting rod module includes a vertically arranged screw rod, and a transmission structure is installed on the bare rod at the lower part of the screw rod, and the transmission structure is inserted into the base socket arranged on the base module and connected to the connecting rod transmission mechanism, and a fixed tube assembly for connecting to the base socket is sleeved on the screw rod, and a lifting nut threadedly connected to the screw rod is arranged at the upper end of the fixed tube assembly, and a movable tube assembly fixedly connected to the lifting nut is arranged outside the fixed tube assembly, and the chair body module and the handle module are installed on the movable tube assembly, and the upper end of the screw rod is fixedly connected to a sliding assembly rotatably connected to the inner wall of the movable tube assembly.

[0008] Furthermore, the transmission structure includes a shaft retaining spring arranged at the lower part of the polished rod, and a bearing, a bushing, a bevel gear and a flat washer are sequentially sleeved on the upper side of the shaft retaining spring on the polished rod, and the lower end of the fixed tube assembly is supported on the flat washer.

[0009] Furthermore, the fixed tube assembly includes a fixed tube, a lower outer wall of the fixed tube is provided with a supporting platform, a fastening nut for threaded connection with the external thread of the socket on the base socket is sleeved on the supporting platform, a pair of limiting columns for matching with the limiting grooves provided on the base socket are provided on the fixed tube and located on the lower side of the supporting platform; a tooth groove is provided on the upper end of the fixed tube and a limiting tooth ring matching with the tooth groove is installed, a copper sleeve which is sleeved on the screw rod and fixedly connected to the fixed tube is provided inside the limiting tooth ring, and the lifting nut is located on the upper side of the copper sleeve.

[0010] Furthermore, the movable tube assembly includes a movable tube, the lower end of which is sleeved with an outer sleeve, and a ball copper sleeve is arranged inside the outer sleeve, which is sleeved on the fixed tube assembly and the upper end of which abuts against the lower end of the movable tube; the sliding assembly includes a ball copper sleeve bracket which is sleeved on the upper end of the screw and fixedly connected to the screw, and the ball copper sleeve bracket is sleeved with a ball copper sleeve located in the movable tube assembly.

[0011] Furthermore, through pipes for being sleeved on the movable tube assembly are vertically fixed on both sides of the front of the chair body module, the outer wall of the movable tube assembly is provided with a supporting platform abutting against the lower end of the through pipe, the upper end of the movable tube assembly passes through the through pipe and is provided with an external thread, and a nut threadedly connected to the external thread is fixed to the rear of the handle module, and a fastening structure cooperating with the movable tube assembly is provided on the nut.

[0012] Furthermore, the connecting rod transmission mechanism includes an input mechanism, which is arranged in the middle of the beam of the base module, and output transmission shafts are respectively arranged on both sides of the input mechanism, and the other ends of the output transmission shafts are respectively connected to the input ends of the lifting rod modules.

[0013] Furthermore, the input mechanism includes a positioning box arranged in the middle of the beam, the positioning box is provided with a torque input shaft, one end of the output transmission shaft extends into the positioning box and is respectively connected to the torque input shaft through a gear pair; side positioning brackets are respectively provided on both side ends of the beam, caster brackets are installed on the side positioning brackets, and a clearance hole is provided between the side positioning bracket and the beam, the other end of the output transmission shaft extends into the corresponding side positioning brackets and is respectively connected to the input end of the lifting rod module through a gear pair passing through the clearance hole.

[0014] A method for operating a modular lifting chair comprises the following steps:

[0015] (1) Put the wrench tool on the torque input shaft;

[0016] (2) Rotate the torque input shaft so that the torque input shaft drives the output transmission shaft to drive the screw to rotate, and the screw drives the lifting nut to drive the movable tube assembly to complete the up and down lifting, thereby enabling the chair body to complete the up and down lifting movement through the movable tube assembly.

[0017] Compared with the prior art, the present invention has the following advantages: the lifting chair has a compact structure and is easy to carry, replace, maintain and store; at the same time, it is easy to operate and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the module assembly of the modular lifting chair of the present invention;

[0019] Figure 2 It is a schematic diagram of the chair body module structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the handle module of the present invention;

[0021] Figure 4 It is a schematic diagram of the lifting rod module mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the movable tube structure in the lifting rod module of the present invention;

[0023] Figure 6 It is a schematic diagram of the fixed tube structure in the lifting rod module of the present invention;

[0024] Figure 7 It is a schematic diagram of the screw structure in the lifting rod module of the present invention;

[0025] Figure 8 It is a schematic diagram of the lifting nut structure in the lifting rod module of the present invention;

[0026] Fig. 9 It is a schematic diagram of the copper sleeve structure in the lifting rod module of the present invention;

[0027] Fig.10 It is a schematic diagram of the structure of the limiting tooth ring in the lifting rod module of the present invention;

[0028] Fig.11 It is a schematic diagram of the structure of the ball copper sleeve bracket in the lifting rod module of the present invention;

[0029] Fig.12 It is a schematic diagram of the fastening nut structure in the base module of the present invention;

[0030] Fig.13 It is a schematic diagram of the base module structure of the modular lifting chair of the present invention;

[0031] Fig.14 It is a schematic diagram of a partial cross-sectional structure of a base module of the present invention;

[0032] Fig.15 It is a schematic diagram of the crossbeam structure in the base module of the present invention;

[0033] Fig.16 It is a schematic diagram of the structure of the center positioning bracket in the base module of the present invention;

[0034] Fig.17 It is a schematic diagram of the side positioning bracket structure in the base module of the present invention;

[0035] Fig.18 It is a schematic diagram of the caster bracket structure in the base module of the present invention;

[0036] Fig.19 It is a schematic diagram of the output transmission shaft in the base module of the present invention;

[0037] Fig. 20 It is a schematic diagram of the box structure in the base module of the present invention;

[0038] In the figure: 1-chair body module; 110-chair body through pipe; 111-through pipe opening; 120-sheath; 130-butterfly buckle; 140-slider; 150-positioning column;

[0039] 2-handle module; 210-nut; 211-nut internal thread; 212-allowance hole; 220-stud; 221-stud internal thread; 230-handle steel frame;

[0040] 3-lifting rod module; 310-movable tube; 311-stop groove; 312-movable tube end external thread; 313-positioning hole; 314-key slot hole; 315-support platform; 316-function extension position; 317-ball copper sleeve; 318-outer sleeve; 320-fixed tube; 321-key slot hole; 322-tooth groove; 323-support platform; 324-limiting column; 330-screw; 331-light rod; 332-screw flat position; 333-circlip groove; 334-screw screw hole; 340-lifting nut; 341-lifting nut Internal thread; 342-keyway hole of lifting nut; 350-copper sleeve; 351-keyway hole of copper sleeve; 352-step of copper sleeve; 360-limiting tooth ring; 361-tooth ring boss; 362-tooth ring anti-rotation surface; 370-ball copper sleeve bracket; 371-cylindrical surface for radial limiting of bracket cap; 372-support surface of copper sleeve bracket; 373-copper sleeve bracket cover; 374-radial limiting hole of bracket cap; 380-key; 390-fastening nut; 391-internal thread of nut; 392-pressing surface of nut; 393-flat surface of nut; 410-flat washer;

[0041] 4-base module; 420-base crossbeam; 421-center bracket clearance hole; 422-side bracket clearance hole; 423-base plug hole; 424-plug hole external thread; 425-bearing fixing hole; 426-bracket fixing hole; 427-limiting groove; 430-center positioning bracket; 431-bearing positioning surface; 432-bracket fixing hole; 440-side positioning bracket; 441-bearing positioning surface; 442-bracket limiting surface; 443-screw guide hole; 444 -bearing limit plate; 450-castor bracket; 451-nut; 452-bearing positioning surface; 453-bracket limiting surface; 454-bracket threaded hole; 455-triangular reinforcement plate; 461-output transmission shaft; 462-connecting rod flat position; 463-circlip groove; 464-bearing; 466-helical gear; 467-bevel gear; 468-shaft retaining ring; 470-housing; 471-bearing positioning surface; 472-support table; 473-input shaft; 474-housing cover. DETAILED DESCRIPTION

[0042] In order to make the above features and advantages of the present invention more understandable, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0043] refer to Figures 1 to 20

[0044] A modular lifting chair comprises a chair body module 1, wherein handle modules 2 are respectively arranged on both sides of the front of the chair body module, a base module 4 connected to the chair body via a lifting rod module is arranged on the lower side of the chair body module, and a connecting rod transmission mechanism for driving the lifting rod module is installed on the base module.

[0045] In this embodiment, the lifting rod module includes a vertically arranged screw rod 330, and a transmission structure is installed on the bare rod at the lower part of the screw rod. The transmission structure is inserted into the base socket 423 arranged on the base module 4 and connected with the connecting rod transmission mechanism, so that the lifting rod module is driven by the connecting rod transmission mechanism to achieve lifting. The screw rod is sleeved with a fixed pipe assembly for connecting with the base socket at the lower part, and a lifting nut 340 is arranged at the upper end of the fixed pipe assembly and is screwed with the screw rod through an internal thread 341. The fixed pipe assembly is outer-mounted with a movable pipe assembly fixedly connected with the lifting nut, and the chair body module and the handlebar module are installed on the movable pipe assembly. The upper end of the screw rod is fixedly connected with a sliding assembly that is rotatably connected with the inner wall of the movable pipe assembly, so as to achieve sliding cooperation with the movable pipe through the sliding assembly.

[0046] In this embodiment, the transmission structure includes a shaft retaining spring 468 disposed at the lower part of the polished rod, and a bearing 464, a bushing 465, a helical gear 466 and a flat washer 410 are sequentially sleeved on the upper side of the shaft retaining spring on the polished rod, and the lower end of the fixed pipe of the fixed pipe assembly is supported on the flat washer to support the fixed pipe. The mounting hole of the helical gear 466 is screwed to the vertical screw flat surface 332 and then screwed in with a set screw to fix it, thereby realizing that the helical gear is fixed on the screw polished rod.

[0047] In this embodiment, in order to achieve connection with the base module and install the movable tube assembly and the screw rod, the fixed tube assembly includes a fixed tube 320, the lower outer wall of the fixed tube is provided with a support platform 323, and the support platform is sleeved with a fastening nut 390 for threading with the socket external thread 424 on the base socket 423. A pair of limiting columns 324 are provided on the fixed tube and located at the lower side of the support platform, and a limiting groove 427 for cooperating with the limiting columns is provided on the base socket, thereby completing the positioning of the fixed tube.

[0048] In this embodiment, the inner surface of the fastening nut 390 is provided with an internal thread 391, and the outer surface is provided with at least a pair of parallel flat surfaces 393 for placing tool wrenches, and the inner ring of the upper end of the fastening nut is also provided with a pressing surface 392 to press and fix the pipe support platform 323. At the same time, the fastening nut is connected to the base socket to realize the installation of the lifting rod module on the base module.

[0049] In this embodiment, the upper end of the fixed tube is provided with a tooth groove 322 and a limiting tooth ring 360 matched with the tooth groove is installed. The limiting tooth ring 360 is provided with bosses 361 and limiting surfaces 362 evenly distributed around the center of the circle, so that the four bosses 361 of the limiting tooth ring 360 are respectively aligned with the four tooth grooves 322 of the fixed tube 320 and inserted. A copper sleeve 350 is provided inside the limiting tooth ring and is sleeved on the screw and fixedly connected to the fixed tube. The copper sleeve 350 is provided with a keyway hole 351 and a step surface 352. The copper sleeve 350 is inserted into the fixed tube 320 until the copper sleeve step surface 352 fits with the limiting tooth ring 360. The keyway hole 351 of the copper sleeve is aligned with the keyway hole 321 of the fixed tube 320 , and the key 380 is placed in the keyway hole 321 of the fixed tube and the keyway hole 351 of the copper sleeve at the same time, so that the copper sleeve 350 and the limiting toothed ring 360 are fixed to the fixed tube 320 .

[0050] In this embodiment, the movable tube assembly includes a movable tube 310, the lower end of which is sleeved with an outer sleeve 318, and the outer sleeve is provided with a ball copper sleeve 317 which is used to be sleeved on the fixed tube and the upper end of which abuts against the lower end of the movable tube, thereby reducing the friction between the movable tube and the fixed tube and improving the rotation effect.

[0051] In this embodiment, the sliding assembly includes a ball copper sleeve bracket 370 that is sleeved on the upper end of the screw and fixedly connected to the screw via a fastening screw 375. The ball copper sleeve 317 located in the movable tube assembly is sleeved on the ball copper sleeve bracket so that the screw and the movable tube can slide and cooperate to reduce friction. During installation, after the ball copper sleeve bracket 370 is sleeved into the end of the screw 330 with the screw hole 334, the ball copper sleeve 317 is placed on the copper sleeve bracket support surface 372, and then the copper sleeve bracket cap 373 is placed thereon. At this time, the bracket cap radial limiting cylindrical surface 371 is in the bracket cap radial limiting hole 374, and the fastening screw 375 is screwed into the screw hole 334 of the screw to fix it.

[0052] In this embodiment, the lifting nut is supported on the upper side of the copper sleeve, and a key slot hole 342 is provided on the lifting nut. The lifting nut key slot hole 342 and the key slot hole 314 on the movable tube are fixedly connected to the movable tube via a key.

[0053] In this embodiment, a function expansion position 316 is further provided on the movable tube and located at the lower side of the supporting platform 315 .

[0054] In this embodiment, the chair body module is a centrally symmetrical structure and is composed of two chair body frame units. The front parts of the two chair body frame units are connected to the base module through the lifting rod module. The front parts of the chair body frame units are vertically fixed with a through pipe 110 for being placed on the upper part of the movable tube assembly. The two ends of the through pipe are respectively built with a sheath 120 so as to be rotatably matched with the movable tube assembly. The outer wall of the movable tube of the movable tube assembly is provided with a support platform 315 abutting against the lower end of the through pipe, so as to realize the rotational connection between the chair body frame unit and the movable tube assembly. The rear part of the chair body frame unit on one side is fixed with a butterfly lock 130, and the rear part of the other chair body frame unit is fixed with a slider 140 and a limit column 150 matched with the butterfly lock, so as to realize the locking of the two chair body frame units through the cooperation of the butterfly lock with the slider 140 and the limit column 150, and facilitate the storage of the chair body module after disassembly, thereby reducing the occupied space.

[0055] In this embodiment, the upper end of the movable tube assembly passes through a through pipe and is provided with an external thread 312. The handle module includes a handle steel frame 230. The rear part of the handle steel frame is fixed with a nut 210 threadedly connected to the external thread. The nut is provided with a fastening structure that cooperates with the movable tube assembly.

[0056] In this embodiment, the fastening mechanism includes an internal thread 221 arranged on the nut and screwed with a stud 220, and the external thread section on the upper part of the movable tube is provided with a positioning hole 313 cooperating with the stud, thereby realizing the connection between the handle module and the lifting rod module, and the handle rises and falls together with the chair body.

[0057] In this embodiment, the base module includes a pair of support seat rods arranged longitudinally, and a tube portion bent upward is arranged at the front part of the pair of support seat rods, and a base socket 423 for inserting a transmission structure arranged on the screw rod is arranged inside the tube portion, and a bearing fixing hole 425 is arranged inside the tube portion. A cross beam 420 connected between the two tube portions is arranged on the tube portion, and side positioning brackets 440 are respectively arranged at both side ends of the cross beam, and caster brackets 450 are installed on the side positioning brackets, and a side bracket yielding hole 422 connected to the tube portion is arranged between the side positioning bracket and the cross beam, and a center bracket yielding hole 421 is arranged in the middle of the cross beam.

[0058] In this embodiment, the connecting rod transmission mechanism includes an input mechanism, which is arranged in the middle of the beam 420 of the base module. Output transmission shafts 461 are respectively arranged on both sides of the input mechanism, and the other ends of the output transmission shafts are respectively connected to the input ends of the lifting rod modules.

[0059] In this embodiment, the input mechanism includes a positioning box arranged in the middle of the crossbeam, the positioning box is composed of a central positioning bracket 430 installed on the central bracket clearance hole 421 and a box body 470 connected to the central bracket, and the central positioning bracket is fixedly connected to the crossbeam through a bracket fixing hole 426 arranged on the crossbeam and located at the rear side of the central bracket clearance hole. A torque input shaft 473 with the upper end passing through the box body is arranged in the box body, one end of the output transmission shaft extends into the positioning box and is respectively connected to the torque input shaft through a gear pair, and the gear pair is composed of a bevel gear 467 arranged on the torque input shaft and a bevel gear 467 arranged on the output transmission shaft.

[0060] In this embodiment, the upper and lower parts of the torque input shaft are rotatably connected to the box body, and the two sides of the box body are respectively provided with bearing positioning surfaces 471, and the central positioning bracket is provided with a bearing positioning surface 431, and the bearing positioning surface 431 cooperates with the bearing positioning surface 471 to realize the bearing positioning on the output transmission shaft. The box body is also provided with an oil injection hole 476 for injecting oil into the gear pair in the box body.

[0061] In this embodiment, one end of the output transmission shaft is rotatably connected to the box body via a bearing 464, and the other end of the output transmission shaft penetrates into the side positioning bracket and is rotatably connected thereto via a bearing 464. The other end of the output transmission shaft is provided with a gear pair passing through the clearance hole 422 and is transmission-connected to the input end of the lifting rod module. The gear pair is composed of a helical gear provided on the output transmission shaft and a helical gear provided at the lower part of the screw.

[0062] In this embodiment, the side positioning bracket and the caster bracket are respectively provided with bearing positioning surfaces 441 and 452 for matching with the bearing of the output transmission shaft; at the same time, the side positioning bracket is provided with a bracket limiting surface 442 for limiting the bracket on the caster after the caster bracket is inserted, and the side positioning bracket and the caster bracket are also provided with screw guide holes 443 and bracket threaded holes 454 for connection. A bearing limiting piece 444 is also provided on the outer surface of the side positioning bracket; and a nut for connecting with the caster assembly is also provided on the caster bracket.

[0063] The assembly steps of each module are as follows:

[0064] 1. Insert the threaded end of the fastening nut 390 downward from the end of the fixed tube 320 with the tooth groove 322, slide until the nut pressing surface 392 conflicts with the supporting platform 323 of the fixed tube 320, align the four bosses 361 of the limiting tooth ring 360 with the four tooth grooves 322 of the fixed tube 320 respectively, and insert the copper sleeve 350 into the fixed tube 320 above the limiting tooth ring 360 until the copper sleeve step surface 352 fits with the limiting tooth ring 360; at this time, the copper sleeve keyway hole 351 is required to be aligned with the keyway hole 321 of the fixed tube 320, and the key 380 is inserted, and the key 380 is simultaneously in the keyway hole 321 of the fixed tube and the keyway hole 351 of the copper sleeve, so that the copper sleeve 350 and the limiting tooth ring 360 are fixed to the fixed tube 320, and the installation of the fixed tube assembly is completed;

[0065] 2. Insert the end of the screw 330 with the polished rod 331 from the copper sleeve end of the fixed tube assembly completed in step 1 until the polished rod surface passes through the fixed tube assembly, insert the flat washer 410, the bevel gear 466, the bushing 465, and the bearing 464 into the polished rod surface 331 of the screw 330 in sequence, and after the screw retaining ring groove 333 is inserted into the retaining ring 468, rotate the mounting hole of the bevel gear 466 to be perpendicular to the flat surface 332 of the screw, and screw in the set screw to fix it; screw the lifting nut 340 from the end of the screw 330 with the screw hole 334 until the lifting nut 340 conflicts with the copper sleeve 350, and the screw installation is completed;

[0066] 3. Pass the end of the movable tube 310 with the outer sleeve 318 through the screw, lifting nut, and fixed tube assembly completed in step 2 in sequence until the key slot hole 314 of the movable tube 310 is aligned with the key slot hole 342 of the lifting nut 340; at this time, the four bosses 361 of the limit gear ring 360 are all in the anti-rotation groove 311 of the movable tube 310, and the key 380 is inserted to the bottom. At this time, the key 380 is simultaneously in the key slot hole 314 of the movable tube 310. and the keyway hole 342 of the lifting nut 340, then insert the ball copper sleeve bracket 370 into the end of the screw rod 330 with the screw hole 334, put the ball copper sleeve 317 on the copper sleeve bracket support surface 372, and then put the copper sleeve bracket cap 373 on it, at this time, the bracket cap radial limit cylindrical surface 371 is in the bracket cap radial limit hole 374, and the fastening screw 375 is screwed into the screw hole 334 of the screw to fix it, and the lifting rod module installation is completed;

[0067] 4. Place the sheath 120 Figure 2 As shown, the two ends 111 of the through pipe 110 are respectively inserted into the chair body module 1 to complete the installation of the chair body module;

[0068] 5. Press the lifting rod module that has completed step 3 Figure 1 The sleeve 120 is inserted into the through pipe 110 of the chair body 1 completed in step 4 in the direction shown, until the sleeve 120 conflicts with the support platform 315 of the movable pipe 310, and the external thread 312 of the movable pipe 310 is completely exposed from the through pipe 110;

[0069] 6. Screw the nut 210 of the handlebar 2 into the external thread 312 of the lifting movable tube 310 until it is tightened. At the same time, align the screw hole of the stud 221 with the positioning hole 313 of the movable tube 310, and screw the set screw into the stud 221 until the set screw just passes through the positioning hole 313;

[0070] 7. Fig.18 The output transmission shaft 461 is respectively placed on the base module 4 fixed with the crossbeam 420, the center positioning bracket 430 and the side positioning bracket 440, and the box body 470 is installed on the center positioning bracket. At this time, the three bevel gears 467 are meshed with each other, and the bearing 464 of the output transmission shaft 461 is clamped by the bearing positioning surface 431 where the center positioning bracket 430 is located and the bearing positioning surface 471 where the box cover 474 is located. The box body 470 is locked and fixed to the base 4 by screws, and then the caster bracket 450 is installed. The screws are fixed to the base 4 through the screw holes to complete the installation of the base module 4.

[0071] 8. Insert the ends of the fixed pipes completed in step 6 into the base sockets 423 completed in step 7 until the support platform 323 contacts the end faces of the sockets 423 and the platform limit posts 324 engage with the socket limit grooves 427. Screw down the fastening nut 390 until the pressing surface 392 is pressed against the surface of the fixed pipe 320 support platform 323 to complete the assembly of the lifting chair.

[0072] A method for operating a modular lifting chair comprises the following steps:

[0073] (1) Put the wrench tool on the torque input shaft;

[0074] (2) Rotate the torque input shaft so that the torque input shaft drives the output transmission shaft to drive the screw to rotate, and the screw drives the lifting nut to drive the movable tube assembly to complete the up and down lifting. At this time, the lifting nut, the movable tube and the chair body can be regarded as a whole, so that the chair body can complete the up and down lifting movement through the movable tube assembly.

[0075] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0076] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, it does not require creative labor to design a modular lifting chair in different forms and its working method. Without departing from the principle and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A modular lifting chair, comprising a chair body module, characterized in that: The front sides of the chair body module are respectively provided with handle modules, and the lower side of the chair body module is provided with a base module connected to the chair body via the lifting rod module, and a connecting rod transmission mechanism for driving the lifting rod module is installed on the base module; the lifting rod module includes a vertically arranged screw rod, and a transmission structure is installed on the bare rod at the lower part of the screw rod, and the transmission structure is inserted into the base socket arranged on the base module and connected with the connecting rod transmission mechanism, and a fixed pipe assembly for connecting with the base socket at the lower part is sleeved on the screw rod, and a lifting nut screwed with the screw rod is arranged at the upper end of the fixed pipe assembly, and a movable pipe assembly fixedly connected with the lifting nut is arranged on the outer sleeve of the fixed pipe assembly, and the chair body module and the handle module are installed on the movable pipe assembly, and a sliding assembly rotatably connected with the inner wall of the movable pipe assembly is fixedly connected with the upper end of the screw rod; the fixed pipe assembly includes a fixed pipe, and a support platform is provided on the lower outer wall of the fixed pipe, and a fastening nut for screwing with the external thread of the socket on the base socket is sleeved on the support platform, and a pair of fastening nuts for screwing with the external thread of the socket on the base socket are arranged on the fixed pipe and located at the lower side of the support platform. A limiting column matched with the limiting groove of the base socket is arranged; the upper end of the fixed tube is provided with a tooth groove and a limiting tooth ring matched with the tooth groove is installed, and a copper sleeve which is sleeved on the screw and fixedly connected to the fixed tube is arranged inside the limiting tooth ring, and the lifting nut is located on the upper side of the copper sleeve; the movable tube assembly includes a movable tube, the lower end of the movable tube is sleeved with an outer sleeve, and a ball copper sleeve which is sleeved on the fixed tube assembly and the upper end of which abuts against the lower end of the movable tube is arranged inside the outer sleeve; the sliding assembly includes a sleeve which is sleeved on the upper end of the screw and fixedly connected to the screw A ball copper sleeve bracket, on which a ball copper sleeve located in a movable tube assembly is sleeved; the connecting rod transmission mechanism includes an input mechanism, which is arranged in the middle of the crossbeam of the base module, and output transmission shafts are respectively arranged on both sides of the input mechanism, and the other ends of the output transmission shafts are respectively connected to the input ends of the lifting rod modules; the input mechanism includes a positioning box arranged in the middle of the crossbeam, and the positioning box is provided with a torque input shaft, and one end of the output transmission shaft extends into the positioning box and is respectively connected to the torque input shaft through a gear pair.

2. A modular chair lift according to claim 1, characterized in that: The chair body module is a centrally symmetrical structure and consists of two chair body frame units. A butterfly lock is fixed to the rear of the chair body frame unit on one side, and a slider and a limit column that match the butterfly lock are fixed to the rear of the other chair body frame unit. The front parts of the two chair body frame units are connected to the base module via lifting rod modules respectively.

3. A modular lifting chair according to claim 1, characterized in that: The transmission structure comprises a shaft retaining spring arranged at the lower part of the polished rod, and a bearing, a bushing, a helical gear and a flat washer are sequentially sleeved on the polished rod and located on the upper side of the shaft retaining spring.

4. A modular chair lift according to claim 1, characterized in that: Through pipes for being sleeved on the movable tube assembly are vertically fixed on both sides of the front of the chair body module. The outer wall of the movable tube assembly is provided with a supporting platform abutting against the lower end of the through pipe. The upper end of the movable tube assembly passes through the through pipe and is provided with an external thread. A nut threadedly connected to the external thread is fixed to the rear of the handle module, and a fastening structure matching the movable tube assembly is provided on the nut.

5. A modular chair lift according to claim 1, characterized in that: Side positioning brackets are respectively provided at both side ends of the crossbeam, caster brackets are installed on the side positioning brackets, and clearance holes are provided between the side positioning brackets and the crossbeam. The other ends of the output transmission shafts extend into the corresponding side positioning brackets and are connected to the input end of the lifting rod module through the gear pair passing through the clearance holes.

6. A method for operating a modular chair lift as claimed in claim 5, characterized in that: The following steps are involved: (1) Put the wrench tool on the torque input shaft; (2) Rotate the torque input shaft so that the torque input shaft drives the output transmission shaft to drive the screw to rotate, and the screw drives the lifting nut to drive the movable tube assembly to complete the up and down lifting, thereby enabling the chair body to complete the up and down lifting movement through the movable tube assembly.

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