CN107638257B - Rotary module of wheelchair - Google Patents

Abstract

The invention discloses a rotating module of a wheelchair, which is used for rotating a seat of the wheelchair relative to a vehicle body of the wheelchair, and comprises a rotating shaft, a rotating body, a gear, a base and a gear driving unit, wherein the upper end of the rotating shaft is fixed at the bottom of the seat, the rotating body and the gear are arranged on the rotating shaft, the base is arranged on the vehicle body, and a supporting sleeve is arranged on the base; the seat is connected with the car body in a rotatable way through the rotating shaft inserted into the supporting sleeve, the rotating body on the rotating shaft is arranged on the supporting sleeve, and the gear on the rotating shaft is meshed with the gear driving unit. The seats on the wheelchair and the wheelchair body can be combined and separated in an inserting mode so as to facilitate transportation and carrying of the wheelchair; the wheelchair is connected with the vehicle body in a one-time manner, so that the mechanical connection and the electrical connection of the wheelchair and the vehicle body are realized, and the mechanical connection is rotatable connection, thereby realizing that the wheelchair changes a driving form through the rotation of a seat so as to adapt to different passing conditions and greatly improve the operability of the wheelchair; meanwhile, the base with the profile structure is adopted, so that the overall size of the wheelchair is greatly reduced, the structure is compact, and the machining amount for producing the wheelchair is greatly reduced.

Description

Rotary module of wheelchair

Technical Field

The invention relates to a wheelchair, in particular to a rotating module of a wheelchair.

Background

The electric wheelchair is usually driven by rear wheels, and the front wheels are universal wheels, so that the electric wheelchair with the design has poor passing performance on complex road surfaces; the existing wheelchair is difficult to turn around on a narrow road surface due to the limitation of turning radius. The wheelchair with the rotation function can overcome the problems, and can be changed into front wheel drive only by rotating the seat by 180 degrees when passing through a complex road surface, so that the trafficability of the complex road surface can be enhanced; when the narrow road surface needs to turn around, the seat is only required to be rotated, and the limitation of turning radius is eliminated.

However, the existing wheelchair with a rotation function, particularly the wheelchair with a rotation driving function, has a seat and a vehicle body combined together through a relatively complex mechanical connection, and the seat and the vehicle body are integrated and are not separable unless mechanically disassembled, so that the wheelchair is inconvenient to carry, for example, the existing electric wheelchair (or the non-folding wheelchair) cannot be assembled into a trunk of a common private car; the transportation and maintenance are inconvenient, for example, when electric wheelchairs are transported in batches, the transportation cost is increased due to the large occupied space of each wheelchair, and the assembly quality and efficiency are difficult to ensure due to the fact that parts are transported to the bottom for installation; the seat is generally detached for maintenance, and the connection between the seat and the vehicle body is complex, so that the assembly workload after the disassembly and repair is large, and the maintenance efficiency is low. In addition to the above-described mechanical connection between the seat and the vehicle body being difficult to separate, there are also problems in the electric wheelchair in that the electrical connection is difficult to separate and the electrical signal wire is easily twisted due to the rotation of the seat. Meanwhile, the rotating driving mechanism has a complex structure and large occupied volume, so that the multifunctional wheelchair is difficult to compact in structure. In addition, the existing electric wheelchair also lacks a corresponding locking and unlocking mechanism for automatically locking and unlocking a rotating position.

Disclosure of Invention

In order to overcome the defects of the prior art and improve the automation, the intellectualization and the humanization of the electric wheelchair, the invention aims to provide the wheelchair rotating module which can be conveniently detached and combined so as to realize the rotation of the wheelchair and realize the modularized structure of the wheelchair, thereby being convenient for carrying, transporting and maintaining the wheelchair.

The above object of the present invention is achieved by the following technical solutions:

the rotating module of the wheelchair is used for enabling a seat of the wheelchair to rotate relative to a vehicle body of the wheelchair and comprises a rotating shaft, a rotating body, a gear, a base and a gear driving unit, wherein the upper end of the rotating shaft is fixed at the bottom of the seat, the rotating body and the gear are arranged on the rotating shaft, the base is arranged on the vehicle body, and a supporting sleeve is arranged on the base; the seat is connected with the car body in a rotatable way through the rotating shaft inserted into the supporting sleeve, the rotating body on the rotating shaft is arranged on the supporting sleeve, and the gear on the rotating shaft is meshed with the gear driving unit. The invention can realize quick rotary connection and quick disassembly between the seat and the vehicle body. The rotating shaft fixed at the bottom of the seat is rotationally connected with the base fixed on the wheelchair body through the rotating body at the lower end of the rotating shaft, so that the seat and the wheelchair body can relatively rotate. In addition, the rotating shaft provided with the rotating body can be conveniently inserted and pulled out from the base, and when the wheelchair is required to be transported, the seat part and the vehicle body part are detached and placed, so that the placing space can be saved, the transportation efficiency is greatly improved, the carrying in life is also convenient, and the wheelchair can be accommodated in a trunk of an automobile through the detachment of the seat and the vehicle body.

The rotary module further comprises a multi-core plug and a multi-core socket, wherein the multi-core plug and the multi-core socket are respectively connected with multiple paths of signal wires, the multi-core plug or the multi-core socket is concentrically connected with the rotating shaft at the lower end of the rotating shaft, the corresponding multi-core socket or the multi-core plug is concentrically connected with the supporting sleeve on the base below the supporting sleeve, and the multiple paths of signal wires of the multi-core plug and the multi-core socket are electrically connected in one-to-one correspondence when the multi-core plug and the multi-core socket are mutually inserted. Thus, even if there is a signal wire between the seat and the vehicle body, the connection and disconnection can be performed quickly, and the signal wire is not twisted by the relative rotation of the seat and the vehicle body.

The gear driving unit comprises a driving motor, a rack, a screw and a nut, wherein the rack is arranged in the base in a sliding mode and meshed with a gear on the rotating shaft, the screw is connected to the rotating shaft of the motor which is horizontally arranged, and the nut is spirally connected with the screw and connected with the rack. The gear driving unit occupies a small height space, so that the wheelchair with the separable seat and the wheelchair body has a compact integral structure.

The base is designed as a section bar and comprises an upper end plate, a containing cavity, a positioning rib plate, a guide rib and a socket sleeve hole, wherein the upper end plate, the containing cavity, the positioning rib plate, the guide rib plate and the positioning rib plate are arranged along the length direction of the section bar; the supporting sleeve is fixed in the supporting hole and axially positioned by the positioning rib plate, the driving motor is arranged in the accommodating cavity, the rack is provided with a guide groove matched with the guide rib, the rack is arranged on the base in a sliding manner through the jogging of the guide groove and the guide rib, and the multi-core socket or the multi-core plug is arranged in the socket sleeve hole; further, the base is swingably provided on the vehicle body. The base still includes swing axle and the hole connecting axle hole that set up along section bar length direction, the swing axle hole is located hold the chamber lower extreme, the connecting axle hole is located at least and is held outside one side of chamber upper end, is equipped with swing axle and connecting axle in swing axle hole and the connecting axle hole respectively, and the both ends of swing axle set up on the base, and the base rotationally sets up on the automobile body through the swing axle, corresponds to connecting axle hole one side and is equipped with the connection notch that link up the connecting axle hole perpendicularly for promote base wobbling actuating lever tip and arrange in the connection notch, the actuating lever articulates in the base through the connecting axle. The base is designed into the section bar, so that the wheelchair can be conveniently manufactured, and the machining amount is greatly reduced; meanwhile, the base section bar has a smart structural design, and even if the gear driving unit is arranged in the base section bar, the height of the base section bar is not more than 10 cm, so that the structure of the wheelchair is compact; the base is rotatably arranged on the vehicle body, so that the base can be matched with the corresponding horizontal sensing element to adjust the seat to keep the horizontal position, and the seat can have a swinging function.

The base also comprises two plane positioning ribs arranged at the lower end of the accommodating cavity and a plane at the lower end of the swing shaft hole along the length direction of the section bar, and the plane is coplanar with the positioning ribs. The base can be rotatably or fixedly connected to the base.

The rotating module further comprises an axial limiting mechanism, the axial limiting mechanism comprises an elastic plug pin and an annular groove arranged in the circumferential direction of the rotating shaft, the elastic plug pin can be elastically moved and is arranged on the base, and one end of the elastic plug pin is inserted into the annular groove in the rotating shaft after the seat is rotatably connected to the vehicle body. The axial limiting mechanism can be used for limiting the accidental separation of the seat and the chassis and ensuring the reliable connection of the seat and the chassis.

The multi-core plug or the multi-core socket is connected in the cavity in the center of the rotating shaft through a corresponding plug sleeve or socket sleeve respectively, and corresponding multi-channel signal wires are led out through the cavity in the center of the rotating shaft. Therefore, the cavity in the center of the rotating shaft is convenient for guiding the signal wire and connecting the rotating shaft with the multi-core plug or the multi-core socket.

The multi-core plug at least comprises a plug body and a plurality of first electric connection terminals which are axially arranged along the plug body and mutually insulated; the multi-core socket at least comprises a socket body and a plurality of second electric connection terminals which are axially arranged along the socket body and mutually insulated, and when the multi-core plug and the multi-core socket are mutually rotatably inserted, the first electric connection terminals and the second electric connection terminals on the same axial position are mutually elastically pressed and electrically connected. Therefore, the invention realizes the electric connection or the separation of the electric connection of the signal wire between the seat and the vehicle body through the pluggable and rotatable one-to-one corresponding connection of the first electric connection terminals and the second electric connection terminals which are arranged along the axial direction.

The rotating module further comprises a circumferential locking mechanism for locking the seat in a rotating position and an unlocking mechanism for unlocking the seat locked in the rotating position; the locking mechanism comprises a turntable and an elastic locating pin, wherein the elastic locating pin is arranged on the base in an elastic up-and-down moving manner, the turntable is fixed at the bottom of the seat, at least two pin holes are formed in the circumferential direction corresponding to the elastic locating pin, when the pin holes on the turntable rotate above the elastic locating pin, the elastic locating pin is elastically inserted into the pin holes, and the upper end part extends out of the upper end face of the turntable, so that the turntable is fixed; the unlocking mechanism comprises an unlocking ring and at least two unlocking units, the unlocking ring is rotatably arranged above the turntable, the lower end face of the unlocking ring is close to or attached to the upper end face of the turntable, and the unlocking units are arranged in the circumferential direction of the unlocking ring, which corresponds to the elastic locating pin; each unlocking unit at least comprises a pushing inclined plane and an elastic pressing pin, wherein the pushing inclined plane and the elastic pressing pin are arranged front and back relative to the rotation direction of the unlocking ring, the pushing inclined plane is obliquely arranged from high to low along the rotation direction, and the low end of the pushing inclined plane is connected with the lower end surface of the unlocking ring; the lower end face is provided with a hole, the elastic pressing pin is arranged in the hole, and the lower end of the elastic pressing pin is exposed out of the lower end face under the action of elasticity; the pushing inclined plane presses the upper end of the elastic locating pin extending out of the upper end face of the turntable until the elastic locating pin moves below the lower end face of the unlocking ring, and the elastic pressing pin presses the elastic locating pin below the lower end face of the unlocking ring until the elastic locating pin is completely pressed out of the turntable. The locking mechanism can keep the state of the seat at the position when the seat rotates to the position of the elastic positioning unit, so that the stability of the seat at the set position is ensured; meanwhile, the driving form is changed by changing the position state of the seat, for example, the seat is locked at two positions with 180 degrees of circumferential angle, the original rear drive can be changed into the front drive, and the wheelchair is in a state of poor passing condition in the travelling process, for example: the wheelchair can be driven by changing the driving mode through the rotation of the seat when meeting small obstacles or without a space for turning around, thereby greatly facilitating the driving operation of the wheelchair; the unlocking is very convenient, and the unlocking ring can be conveniently unlocked only by rotating the unlocking ring. The elastic pressing pins are preferably spring balls, the unlocking units are uniformly distributed on the unlocking ring, and the two pin holes are symmetrically arranged relative to the rotation center of the turntable.

A transmission arm for controlling the unlocking ring to rotate is arranged on one side of the unlocking ring, a limiting hole groove is formed in the corresponding position of the rotary table, and the transmission arm penetrates through the limiting hole groove and extends out of the rotary table; the seat is characterized by further comprising a control lever and a control handle, wherein one end of the control lever is connected with the control handle, the other end of the control lever is connected with a transmission arm extending out of the turntable, and the control handle is positioned on the right side or the left side of the seat.

The upper end face of the unlocking ring is provided with a plurality of limit protrusions distributed along the circumferential direction, the seat bottom is provided with a limit groove in a matched mode, the unlocking ring is arranged in the limit groove through the limit protrusions to be close to or attached to the upper end face of the rotary table to rotate, and the rotation center is concentric with the rotation center of the rotary table. Therefore, the limiting groove at the bottom of the seat is used for limiting the limiting protrusion on the upper end face of the unlocking ring, so that the unlocking ring can complete circular motion, the motion track structure of the unlocking ring for rotation is simpler, and the unlocking ring is convenient to manufacture.

The limiting protrusions are uniformly distributed on the circumferential direction of the upper end face of the unlocking ring.

The limiting groove consists of a limiting annular wall and a plurality of circular arc walls distributed along a circumference, and the circular arc walls are positioned on the inner side of the annular wall; the arc length of the arc wall is longer than the arc length of the interval between two adjacent arc walls. The limiting groove is formed by a plurality of circular arc walls and a circular ring wall positioned on the inner side, and is convenient to manufacture.

The unlocking mechanism further comprises a plurality of torsion springs which enable the unlocking ring to rotate and return, the torsion springs are uniformly distributed in a circumferential direction in the unlocking ring, one end of each torsion spring is fixed on the bottom of the seat, and the other end of each torsion spring penetrates through a neutral position formed by two adjacent circular arc walls at intervals to touch and press a limiting protrusion on the unlocking ring.

The unlocking ring upper end is provided with a plurality of elastic bodies which enable the lower end face of the unlocking ring to be close to or attached to the upper end face of the turntable, and the elastic bodies are arranged at the bottom of the seat.

The outer side of each circular arc wall is provided with an elastic body seat, the center of the elastic body seat is provided with a hole, and the elastic body is arranged in the hole. The elastic body presses and touches the unlocking ring, so that the lower end surface of the unlocking ring is close to or attached to the upper end surface of the turntable. The elastomer is preferably a ball.

The unlocking mechanism further comprises a plurality of torsion springs which enable the unlocking ring to rotate and return, the torsion springs are uniformly distributed in a circumferential direction in the unlocking ring, one end of each torsion spring is fixed on the bottom of the seat, and the other end of each torsion spring penetrates through a neutral position formed by two adjacent circular arc walls at intervals to touch and press a limiting protrusion on the unlocking ring. The torsion springs distributed in the circumferential direction are used for replacing a torsion spring which is usually placed in a central rotation position, so that the size of the torsion spring (including the used steel wire size) can be greatly reduced, the size of the whole rotation module along the direction of a rotating shaft is as small as possible, and the stress of the unlocking ring during return is more balanced, so that return rotation is more stable.

The elastic pressing pin is a spring ball pressed by the compression spring. Simple structure and convenient implementation.

One side of the unlocking ring is provided with a transmission arm for controlling the unlocking ring to rotate, a limiting hole groove is formed in the corresponding position of the rotary disc, and the transmission arm penetrates through the limiting hole groove and extends out of the rotary disc. For steering control of the unlocking ring rotation.

The base is provided with a positioning pin seat for placing the elastic positioning pin; the elastic locating pin consists of a locating pin, a spring retainer ring and a spring, wherein the spring retainer ring is clamped on the locating pin, the spring is arranged in a locating pin seat and sleeved with the locating pin, and the free end of the spring retainer ring is abutted against the spring retainer ring, so that the locating pin returns. Simple structure and convenient implementation.

The power switch of the rotating motor in the gear driving unit is set as a proximity switch, the proximity switch is arranged below the positioning pin, when the positioning pin is completely pressed out of the turntable, the lower end of the positioning pin triggers the proximity switch to drive the motor to work, and the rotating shaft rotates; the locating pin returns to reinsert the pinhole, and the lower extreme and the proximity switch of locating pin separate, driving motor stop work, and the pivot stops rotating. The rotating motor in the gear driving unit is skillfully controlled by the up-and-down movement of the positioning pin, so that a special control unit can be saved.

The rotating body is a tapered roller bearing rotating body and comprises a bearing inner ring connected to the rotating shaft, a retainer connected to the bearing inner ring and tapered rollers capable of being supported on the retainer; the bearing sleeve is a bearing outer ring of the tapered roller bearing; the seat is inserted into the bearing outer ring through the rotating shaft, and the tapered roller bearing rotating body is arranged on the bearing outer ring and is rotationally connected with the vehicle body. Or the rotating body comprises a bearing and a connecting sleeve, the bearing is connected to the rotating shaft through an inner ring of the bearing, and the connecting sleeve is connected to an outer ring of the bearing and has a non-circular profile; an inner cavity matched with the profile of the connecting sleeve is arranged in the supporting sleeve; the seat is inserted into the supporting sleeve through the rotating shaft, and the connecting sleeve is arranged in the inner cavity of the supporting sleeve and is rotationally connected with the vehicle body. The conical rollers are matched with the outer ring of the bearing, so that the rotation resistance is greatly reduced, and a certain axial force can be born, so that the seat can be rotated easily.

The rotary body is a cylindrical rotary body or a truncated cone-shaped or hemispherical rotary body, and inner cavities of the supporting sleeves corresponding to the cylindrical rotary body, the truncated cone-shaped and the hemispherical rotary body are respectively matched with the rotary body and are rotatably arranged in the supporting sleeves matched with the corresponding rotary body in shape.

Therefore, the invention has the following beneficial effects: the seats on the wheelchair and the wheelchair body can be combined and separated in an inserting mode so as to facilitate transportation and carrying of the wheelchair; the wheelchair is connected with the vehicle body in a one-time manner, so that the mechanical connection and the electrical connection of the wheelchair and the vehicle body are realized, and the mechanical connection is rotatable connection, thereby realizing that the wheelchair changes a driving form through the rotation of a seat so as to adapt to different passing conditions and greatly improve the operability of the wheelchair; meanwhile, the base with the profile structure is adopted, so that the overall size of the wheelchair is greatly reduced, the structure is compact, and the machining amount for producing the wheelchair is greatly reduced.

Drawings

Fig. 1 is a schematic view showing a structure of a rotary module connected between a seat and a vehicle body according to embodiment 1.

Fig. 2 is a schematic view of the rotary module of fig. 1 when the seat is separated from the vehicle body.

Fig. 3 is a schematic view showing the structure of a rotary die having a multi-core plug and a multi-core socket, which is connected between a seat and a vehicle body, as shown in embodiment 2.

Fig. 4 is a schematic view of the rotation module shown in fig. 3 when the seat is separated from the vehicle body.

Fig. 5 is a schematic view of the structure of the multi-core plug and the multi-core socket when they are plugged into each other.

Fig. 6 is a schematic view of the multi-pin plug shown in fig. 5.

Fig. 7 is a schematic view of the multi-core socket shown in fig. 5.

Fig. 8 is a top view of the multi-cord receptacle of fig. 7.

Fig. 9 is a schematic view showing a structure of a rotary die having a multi-core plug and a multi-core socket connected to a rotary shaft and connected to a base, which is connected between a seat and a vehicle body, as shown in embodiment 3.

Fig. 10 is a schematic view of the structure of the rotary die shown in fig. 9 when the multi-core plug and the multi-core socket are plugged into each other.

Fig. 11 is a schematic view of the multi-core socket shown in fig. 10.

Fig. 12 is a bottom view of the multi-cord receptacle of fig. 11.

Fig. 13 is a schematic view of the multi-pin plug shown in fig. 10.

Fig. 14 is a cross-sectional view of the rotary module (cross-section along the length of the base) given in example 4.

Fig. 15 is a cross-sectional view of the rotary module shown in fig. 14.

Fig. 16 is a three-dimensional structural schematic diagram of a gear drive unit in embodiment 4.

Fig. 17 is a schematic structural view of the spindle axial locking mechanism.

Fig. 18 is a schematic view of the base structure of the base profile structure.

Fig. 19 is a positional relationship diagram of the rotation lock mechanism and the unlock mechanism with respect to the seat and the base.

Fig. 20 is a schematic view of the structure of the rotation lock mechanism.

FIG. 21 is a schematic view of a spring retainer pin.

Fig. 22 is a positional relationship diagram of the rotation lock mechanism and the unlock mechanism.

Fig. 23 is a three-dimensional schematic of a unlocking ring.

FIG. 24 is a schematic view of a seat bottom restraint groove and restraint annular wall.

Fig. 25 is a cross-sectional view A-A of the unlocking ring shown in fig. 23.

Fig. 26 is a schematic diagram of the working principle of the unlocking ring, wherein:

fig. 27 is a three-dimensional schematic view of the positional relationship of the turntable, unlocking ring, and torsion spring.

Fig. 28 is a schematic view of a detent-triggered proximity switch.

Fig. 29 is a schematic view of the locating pin away from the proximity switch.

Fig. 30 shows another construction of the rotor and bearing sleeve.

Fig. 31 is a schematic view of the structure of a cylindrical rotor and a corresponding bearing sleeve.

Fig. 32 is a schematic view of the structure of a truncated cone-shaped rotor and a corresponding support sleeve.

Fig. 33 is a schematic view of the structure of a spherical rotor and a corresponding bearing sleeve.

In the figure, 1 is a seat, 2 is a vehicle body, 3 is a rotating module, 4 is a rotating shaft, 17 is a gear, 18 is a rack, 19 is a driving motor, 191 is a nut, 192 is a screw, 195 is a transmission gear, 196 is a stepping motor, 31 is a supporting sleeve, 41 is an elastic plug pin, 42 is an annular groove, 45 is a plug sleeve, 46 is a socket sleeve, 5 is a base, 6 is a seat bottom rotating shaft jack, 61 is a screw hole of a seat bottom fixing taper sleeve, 62 is a screw hole of a seat bottom fixing turntable, 63 is a column body of a seat bottom fixing torsion spring, 7 is a supporting sleeve, 8 is a tapered roller bearing, 9 is a tapered roller bearing, 91 is a tapered roller bearing, 92 is a connecting sleeve, 921 is a plane, 922 is an arc surface, 10 is a bearing outer ring, 11 is a taper sleeve, 111 is a fixing hole on the taper sleeve, 12 is a lower pad sleeve, 13 is a lock plate, 14 is a lock groove, 141 is a baffle, 20 is a fixing hole on the turntable, 201 is a fixing hole on the turntable, 21 is a locating pin seat, 22 is a locating pin, 23 is a spring retainer, 24 is a compression spring, 25 is a pin hole, 26 is a limit slot hole on a turntable, which is matched with a transmission arm, 27 is a unlocking ring, 271 is a lower end face of the unlocking ring, 272 is an upper end face of the unlocking ring, 273 is a hole for placing a bump, 28 is an unlocking cavity, 29 is a bump, 32 is a pushing inclined plane, 321 is an upper abutting surface, 33 is a limit protrusion, 34 is a transmission arm, 35 is a limit groove, 351 is a limit circular wall, 352 is a circular arc wall, 353 is an elastic pressing pin placing hole, 36 is a torsion spring, 37 is a bump, 51 is an upper end plate, 510 is a locating plane, 511 is a guide rib, 512 is a side accommodating cavity, 513 is a plane locating rib, 514 is a plane, 54 is a swinging shaft hole, 55 is a connecting shaft hole, 551 is a connecting notch, 56 is a supporting hole, 561 is a locating pin seat hole, 59 is a socket sleeve, 592 is a kidney-shaped hole, 15 is a multi-core plug, 151 is a plug body, 152 is a first clamp spring, 153 is a first electrical connection terminal, 154 is an insulating ring, 155 is a lead hole, 156 is a first electrical connection wire, 157 is an axial positioning step surface, 158 is a second clamp spring, 159 is a step surface, 16 is a multi-core socket, 161 is a socket body, 162 is an adjusting nut, 163 is a second electrical connection terminal, 165 is a spring, 166 is a second electrical connection wire, 167 is a lead hole slot, 168 is a plug hole, 169 is a terminal hole, and 196 is a proximity switch.

Detailed Description

The invention is further described below with reference to examples and figures.

Example l

As shown in fig. 1 and 2, the swivel module 3 of the present invention is provided between a seat 1 and a vehicle body 2 of a wheelchair for rotating the seat 1 on the wheelchair relative to the vehicle body of the wheelchair. The rotary module 3 comprises a rotary shaft 4, a rotary body 9, a gear 17, a base 5, a supporting sleeve 31 and a gear driving unit; the upper end of the rotating shaft 4 is fixed on the bottom of the seat, the rotating body 9 and the gear 17 are arranged on the rotating shaft 4, and the supporting sleeve 31 is arranged on the base 5. The rotor 9 of the present embodiment is a rotor in a tapered roller bearing 8, and is composed of a bearing inner ring (not shown) in the bearing 8, a retainer (not shown) connected to the bearing inner ring, and tapered rollers (not shown) supported on the retainer, the bearing inner ring is connected to the rotating shaft 4, the bearing outer ring is connected to the base 5 as a supporting sleeve 31, and the base 5 is connected to the vehicle body 2. The gear 17 of the present embodiment is a bevel gear, the corresponding gear driving unit includes a transmission gear 195 engaged with the gear 17 and a stepping motor 196, the transmission gear 195 is a bevel gear fitted with the gear 17, the gear is rotatably supported on the base 5 and connected to a rotation shaft of the stepping motor 196, and the stepping motor 196 is fixed to the vehicle body 2.

When the rotating shaft 4 on the seat 1 is inserted into the supporting sleeve (bearing outer ring) 31 and the rotating body on the rotating shaft is arranged on the supporting sleeve 31, the gear 17 on the rotating shaft is meshed with the gear driving unit, that is, the tapered rollers in the tapered roller bearing 8 are arranged in the supporting sleeve 31, and the gear 17 is meshed with the transmission gear 195 in the gear driving unit, the seat 1 and the vehicle body 2 can be connected in a pluggable and rotatable manner, and when the seat and the vehicle body are required to be separated, the seat is separated from the vehicle body through the rotating shaft and is pulled out of the base.

Example 2

This example was made on the basis of example 1. Embodiment 1 can realize the mechanical separation of seat and automobile body, has a plurality of signal lines between seat and the automobile body that this embodiment corresponds, and when seat and automobile body separated, a plurality of signal lines made the two unable thorough physical separation. The invention is therefore also provided with a multi-core plug 15 and a multi-core socket 16 for electrically connecting or disconnecting the seat 1 to the vehicle body 2. As shown in fig. 3, in this embodiment, the multi-core plug 15 and the rotating shaft 4 are concentrically connected to the lower end of the rotating shaft 4, the multi-core socket 16 is concentrically arranged below the supporting sleeve 31 (i.e. the bearing outer ring), and when the seat 1 is inserted into the bearing outer ring through the rotating shaft 4 and the rotator 9 on the rotating shaft 4 is arranged on the bearing outer ring, the multi-core plug 15 at one end of the rotating shaft is mutually inserted into the multi-core socket 16 on the base 5 to perform electric connection of multi-channel electric signal transmission; when the seat 1 is pulled out of the bearing outer ring, the electrical connection is separated from the vehicle body 2, as shown in fig. 4.

In order to facilitate connection with different sized multi-core plugs 15, the shaft 4 is connected with the multi-core plug 15 through plug housings 45. As shown in fig. 5 and fig. 3 and 4, the rotating shaft 4 is a structure with a circular hole-shaped cavity at the center, a hole matched with the plug sleeve 45 is arranged at the lower end of the rotating shaft 4, the multi-core plug is tightly matched in the plug sleeve 45 and is concentrically connected with the lower end of the rotating shaft 4 through the matching of the plug sleeve 45 and the hole of the rotating shaft, and the electric signal transmission lines on the seat are led out through the cavity at the center of the rotating shaft. The multicore plug 15 and the multicore socket 16 of the present embodiment are respectively provided with a plurality of first electrical connection terminals 153 and a plurality of second electrical connection terminals 163 which are arranged along the axial direction and are mutually insulated, and when the multicore plug 15 and the multicore socket 16 are mutually inserted, the second electrical connection terminals are elastically pressed against the first electrical connection terminals at the corresponding axial positions, so as to electrically connect the two corresponding electrical connection terminals, thereby transmitting electrical signals.

As shown in fig. 6, the multi-core plug 15 includes a plug body 151, a first electrical connection terminal 153, an insulating ring 154 and a first electrical connection wire 156, where the plug body 151 is a hollow tube made of an insulating material, and a plurality of axially distributed lead holes 155 are disposed at a circumferential position of a tube wall of the hollow tube, and the lead holes 155 are connected with a hollow cavity in the center of the hollow tube; the first electrical connection terminal 153 and the insulating ring 154 are respectively circular rings matched with the outer wall of the hollow tube, and are respectively made of conductive materials and insulating materials, and the outer diameter of the first electrical connection terminal 153 is larger than that of the insulating ring 154; the plurality of first electrical connection terminals 153 are sleeved on the plug body 151 along the axial direction and are separated by the insulating ring 154, and each first electrical connection terminal 153 is arranged at the axial position corresponding to the lead hole 155, so that one end of an electrical connection wire connected with the first electrical connection terminal 153 is connected with the first electrical connection terminal 153, and the other end of the electrical connection wire is led into the hollow cavity of the plug body 151 through the lead hole 155 and led out from the hollow cavity.

As shown in fig. 7 and 8, the multi-core socket 16 includes a multi-core socket body 161, a second electrical connection terminal 163, a spring 165, an adjustment nut 162, and a second electrical connection wire 166; the second electrical connection terminal 163 has a small diameter end at one end and a large diameter end at the other end, and the second electrical connection wire 166 is connected to the large diameter end; the multi-core socket body is provided with a plug hole 168 matched with the outer diameter of the first electric connection terminal 153 at the center, a plurality of terminal holes 169 distributed along the axial direction are arranged at a circumferential position of the multi-core socket body, the terminal holes are arranged along the radial direction of the plug hole 168 and penetrate through the hole wall of the plug hole 168, the aperture of the terminal holes corresponding to the inner side end of the plug hole 168 is larger than the diameter of the small diameter end but smaller than the diameter of the large diameter end of the second electric connection terminal 163, the hole wall of the outer side end is provided with an internal thread, one end of an adjusting nut 162 is arranged in the terminal hole 169 through screwing, the center of the adjusting nut is provided with a hole, one end of a spring 165 abuts against the second electric connection terminal 163, one end abuts against the adjusting nut 162, under the elastic force of the spring 165, the second electric connection terminal 163 extends towards the plug hole side to be pressed against the corresponding first electric connection terminal 153, the second electric connection terminal 153 is electrically connected with the first electric connection terminal 153, and the mutual abutting degree of the two electric connection terminals is adjusted through adjusting the screwing depth of the adjusting nut 162, so that better electric connection is ensured. A second electrical connection wire 166 having one end connected to the large diameter end of the second electrical connection terminal and the other end led out of the multi-core socket 16 through a hole at the center of the spring 165 and the adjustment nut 162.

The multi-core socket 16 is in a circular tube shape, is axially positioned on the socket sleeve 59 and is tightly matched with the socket sleeve, and the multi-core socket 16 is fixed on the base 5 through the socket sleeve 59. A waist-shaped hole 592 is provided in a circumferential position of the side wall of the socket housing 59, the waist-shaped hole corresponding to a circumferential position of the terminal hole 169 of the multi-core socket 16, the adjusting nut 162 is screwed to the terminal hole 169 from the waist-shaped hole, a lead hole groove 167 is provided in a circumferential position of the lower end of the multi-core socket 16 corresponding to the terminal hole 169, and the second electrical connection wire 166 is led from the central hole of the socket housing 59 to the multi-core socket 16 through the lead hole 167.

The multi-core plug 15 further includes a first clamp spring 152 and a second clamp spring 158, the pipe wall of the plug body 151 is further provided with a terminal axial positioning step surface 157 and two corresponding clamp spring grooves, the uppermost first electric connection terminal is axially positioned by the terminal axial positioning step surface 157, then the insulating ring 154 and the first electric connection terminal 153 are sequentially sleeved on the plug body 151 at intervals, the clamp spring 152 is arranged in the clamp spring groove corresponding to the position of the lowermost insulating ring 154, the axial position of the lowermost insulating ring 154 is limited, and all the first electric connection terminals 153 and the insulating ring 154 are fixed on the plug body 151. The end of the clamp spring 152 opposite to the end of the rotating shaft is provided with a chamfer, and the chamfer is more easily inserted into the front end of the second electrical connection terminal 163 protruding from the insertion hole 168, pressing it into the terminal hole, so that the multi-core plug is easily inserted into the multi-core socket. The second clamping spring 158 is disposed above the terminal axial positioning step surface 157 and is used for clamping the clamping spring 154, and the clamping spring 158 is used for positioning the relative position of the multi-core plug 15 inserted into the multi-core socket 16 so as to ensure the one-to-one corresponding electrical connection positional relationship between the first electrical connection terminal and the second electrical connection terminal.

Therefore, when the seat is connected to the vehicle body through the rotating shaft and the rotating body in a rotating way, the multi-core plug and the multi-core socket are mutually inserted, the multi-channel signal wires of the multi-core plug and the multi-core socket are electrically connected in a one-to-one correspondence way, and when the seat is pulled out of the vehicle body, the electrical connection is separated, so that the seat is conveniently connected with the vehicle body mechanically and electrically. Meanwhile, the multi-core plug and the multi-core socket can rotate relatively, so that the problem that the signal wires are wound due to the relative rotation between the seat and the vehicle body is solved.

Example 3

As shown in fig. 9 and 10, this embodiment is basically the same as embodiment 2 and is also made on the basis of embodiment 1. The difference from embodiment 2 is that the multi-core socket 16 is concentrically connected to the lower end of the rotary shaft 4 through the socket cover 46, and the multi-core plug 15 is disposed on the base 5 below the supporting cover 31 through the plug cover 45 and is concentric with the supporting cover 31. The bearing bush 31 is the outer race of the bearing, as in embodiment 2. When the seat is inserted into the supporting sleeve 31 through the rotating shaft 4 and the rotating body on the rotating shaft is configured on the outer ring of the bearing, the multi-core socket 16 at one end of the rotating shaft is mutually inserted with the multi-core plug 15 on the base 5 to electrically connect multiple paths of electric signal transmission; the separation of the electrical connection is made with the vehicle body when the seat is pulled away from the seat pull-out bearing outer ring 10.

As shown in fig. 11 and 12, the lead hole groove 167 of the multi-core socket 16 of the present embodiment is provided above the terminal hole 169, and the first electrical connection wire 166 is led out of the multi-core socket 16 from the center hole of the socket cover 59 through the lead hole 167; as shown in fig. 13, the multi-core plug 15 is tightly fitted in the plug housing 45, and is positioned and mounted on the base 5 through the plug housing 45, and is concentric with the supporting housing 31, and other structures are the same as those of embodiment 2, and will not be described again.

As shown in fig. 13, the multi-core plug 15 of the present embodiment is basically the same as that of embodiment 2, except that the multi-core plug body of the present embodiment is provided with a step surface 159 instead of the snap spring 152 in embodiment 2, so as to position the relative position of the card multi-core plug 15 inserted into the multi-core socket 16, and ensure the one-to-one electrical connection positional relationship between the first electrical connection terminal and the second electrical connection terminal.

Example 4

As shown in fig. 14 and 15, the rotating module for rotating the seat 1 on the wheelchair relative to the body of the wheelchair in the present embodiment mainly comprises a rotating shaft 4, a rotating body 9, a gear 17, a base 5, a supporting sleeve 31, a gear driving unit, and a multi-core plug 15 and a multi-core socket 16 which are mutually inserted; the upper end of the rotating shaft 4 is fixed to the bottom of a seat (not shown), the rotating body 9 and the gear 17 are provided on the rotating shaft 4, and the supporting sleeve 31 is provided on the base 5. The rotor 9 is a rotor in the tapered roller bearing 8, and is composed of a bearing inner ring (not shown) in the bearing 8, a retainer (not shown) connected to the bearing inner ring, and tapered rollers (not shown) supported on the retainer, the bearing inner ring is connected to the rotating shaft, the bearing outer ring is connected to the base 5 as a supporting sleeve 31, and the base 5 is connected to the vehicle body 2 (not shown). The multi-core plug 15 and the multi-core socket 16 for electrically connecting or disconnecting the seat 1 with the signal line on the vehicle body 2 are fixedly connected to the lower end of the rotating shaft 4 and the base of the lower end of the supporting sleeve 31 through the corresponding plug bush 45 and socket bush 59, respectively, and are concentric with the rotating shaft 4 and the supporting sleeve 31, respectively. Since the number of signal lines corresponding to the present embodiment is small, the plugs and sockets of the earphone are used as the substitutes of the multi-core plug 15 and the multi-core socket 16. The rotary shaft 4 is provided with a circular hole-shaped cavity at the center as in the above embodiment 3, and the multi-core plug 15 is fixed to the rotary shaft 4 through the plug bush 45, and as shown in fig. 16, the gear 17 of the present embodiment is a straight gear, and the corresponding gear driving unit includes a rotary motor 19, a rack 18, a screw 192 and a nut 191.

As shown in fig. 17, the rotating module of the present embodiment is further provided with an axial locking mechanism for restricting the unexpected detachment of the seat from the vehicle body, the axial limiting mechanism comprising an annular groove 42 provided in a circumferential direction of the rotating shaft and an elastic plug pin 41 (commercially available) elastically inserted into the annular groove, the elastic plug pin 41 being elastically movably provided on the base.

As shown in fig. 18, the base 5 is designed as a profile structure, and the base profile comprises an upper end plate 51, a containing cavity, a positioning rib plate and guide ribs 511, wherein the upper end plate 51 is arranged along the length direction of the profile, the containing cavity is arranged below the upper end plate 51, the positioning rib plate is at least provided with a positioning plane 510 parallel to the upper end plate, the containing cavity is divided into an upper containing cavity and a lower containing cavity which are distributed up and down, a group of guide ribs 511 perpendicular to the positioning plane 510 divide the lower containing cavity into a middle containing cavity and side containing cavities 512 at two sides, and a group of guide ribs are formed by two guide ribs 511 which are arranged up and down in parallel and are mutually spaced, and extend from the lower end surface of the positioning rib plate and the corresponding cavity wall surface of the containing cavity respectively.

Further, in order to realize the forward and backward rotation function of the wheelchair, the base 5 is rotatably disposed on the vehicle body 2, and therefore, a connection shaft hole 55 and a swing shaft hole 54 are further disposed on the base section along the length direction of the base section, the connection shaft hole 55 is disposed at least on one side of the outer side of the upper end of the accommodating cavity, and the swing shaft hole 54 is disposed at the lower end of the outer side of the accommodating cavity.

The base 5 intercepts the base profile according to the designed size, and a supporting hole 56 is processed on the upper end plate 51 of the intercepted base profile, and the supporting sleeve 31 is fixed on the supporting hole 56 and takes the positioning rib plate as an axial positioning surface. Holes 561 for passing the gear 4 on the rotating shaft 4 are formed in the positioning plane 510, socket sleeve holes (not shown) are formed in the bottom of the middle accommodating cavity, the through holes are through holes formed by taking the supporting holes as axes, the socket sleeve holes are vertically connected with the swing shaft holes 54 at the lower end of the base, the swing shaft holes 54 are divided into two sections, and the base 5 is rotatably connected to the vehicle body 2 through two swing shafts which are respectively arranged in the two sections of the swing shaft holes 54. The socket sleeve 59 is disposed in the socket sleeve bore, and the multi-pin socket 16 is secured in the socket sleeve 59. A connecting slot 551 penetrating the connecting shaft hole is arranged at the side corresponding to the connecting shaft hole, the end of a driving rod for controlling the rotation of the base 5 is arranged in the connecting slot 551, and the driving rod is hinged with the base 5 through a connecting shaft penetrating the connecting shaft hole 55. The drive lever of the present embodiment is an output shaft of a motor that is axially movable (see chinese patent publication No. CN201520922383, entitled "motor") swingably provided on the vehicle body 2, and the seat is urged to rotate by the axial movement of the output shaft. The front and back horizontal state of the seat can be adjusted, for example, the seat can be kept in the horizontal state even if a level sensor (gyroscope) is combined during climbing, and the seat can be swung back and forth through the reciprocating axial movement of the output shaft, so that the seat has a leisure function.

The gear driving unit for driving the seat to rotate is also arranged in the base 5, a rotating motor 19 is arranged in a side accommodating cavity 512, a guide groove matched with the guide rib 511 is arranged on the rack 18, the rack is arranged on the base 5 in a sliding manner through the jogging of the guide groove and the guide rib, a screw 192 is connected to a rotating shaft of the horizontally arranged motor 19, and a nut 191 is spirally connected with the screw and is connected with the rack; the motor 19 rotates, the nut 191 is axially moved by the screw 192 to drive the rack 18 to move, and the rack engages the transmission gear 17 to rotate the rotating shaft 4. Through mounting holes (see fig. 14) are provided at M of the outer side wall of the accommodation chamber of the base 5 and at N of the guide rib 511 on the corresponding side, through which a commercially available elastic plug pin 41 is provided to be elastically movably provided on the base 5, and the inner side end thereof is inserted into the annular groove 42 on the rotation shaft 4. When the seat 1 is to be separated from the vehicle body 2, the plug pin 41 is pulled outwards, and the inner side end of the plug pin moves out of the annular groove 42 on the rotating shaft 4, so that the seat 1 can be pulled out of the vehicle body; the plug pin 41 is not pulled outwards any more, and then automatically returns under the action of elastic force, and the plug pin 41 acts in the annular groove 42 of the rotating shaft 4, so that the axial position of the rotating shaft is limited.

In addition, the profile corresponding to the base 5 further includes two planar positioning ribs 513 disposed at the lower end of the accommodating cavity along the length direction of the profile, and further includes a planar surface 514 disposed at the lower end of the swing shaft hole 54 along the length direction of the profile, and the planar surface 514 is coplanar with the planar surface of the positioning ribs 513, so that the base 5 of the present embodiment can be used as a base of a wheelchair that does not require back and forth swing, that is, the base 5 can be positioned on the connecting bracket by at least two positioning ribs 513, or the positioning ribs 513 and the planar surface 514 at the lower end of the swing shaft, and is fixedly connected to the connecting bracket instead of being rotatably connected to the connecting bracket, as in embodiment 2. Therefore, the base has better universality and is suitable for the building requirements of various functional wheelchair vehicles.

The base is designed into the section bar, so that the wheelchair can be conveniently manufactured, and the machining amount is greatly reduced; meanwhile, the base section bar has a smart structural design, and the height of the base section bar is not more than 10 cm even though the gear driving unit is arranged in the base section bar, so that the structure of the wheelchair is compact.

Example 5

In this embodiment, in order to ensure that the seat is stable with respect to the vehicle body at a certain rotational position, a lock mechanism for locking the seat at the rotational position and an unlock mechanism 22 for unlocking the seat locked at the one position before the seat is rotated again are provided, as shown in fig. 19.

As shown in fig. 20-21, the locking mechanism comprises a turntable 20 and elastic positioning pins 2A, the turntable 20 is fixed at the bottom of the seat, two pin holes 25 are arranged on the same circumference direction of the turntable 20, the phase difference is 180 degrees, the elastic positioning pins 2A are composed of compression springs 24, spring retainer rings 23 and positioning pins 22, the spring retainer rings 23 are clamped on the upper parts of the positioning pins 22, the compression springs 24 are sleeved with the positioning pins 22, the free ends of the compression springs are connected with the positioning pins 22 through abutting against the spring retainer rings 23, the positioning pins 22 are arranged in positioning pin seats 21 through the compression springs 24, the positioning pin seats 21 are fixed on the base 5 and are positioned below the turntable 20 and at a circumferential position corresponding to the pin holes, and when the pin holes 25 on the turntable 20 rotate above the positioning pins 22, the upward acting force of the compression springs enable the positioning pins 22 to be sprung up into the pin holes 25 and the upper ends of the positioning pins 22 to extend out of the upper end faces of the turntable 20, so that the turntable 20 is fixed.

As shown in fig. 22-25, the unlocking mechanism includes an unlocking ring 27 rotatably disposed above the turntable 20 and rotatable relative to the turntable, and two unlocking units (more unlocking units may be disposed), where the lower end surface of the unlocking ring 27 approaches or is attached to the upper end surface of the turntable 20, and the two unlocking units are uniformly distributed on the unlocking ring 27 in the circumferential direction corresponding to the pin hole 25, and each unlocking unit is at least composed of a pushing inclined surface 32 disposed front and back relative to the rotation direction of the unlocking ring 27 and an elastic pressing pin capable of elastically moving up and down, so as to form a secondary unlocking. The pushing inclined surface 32 is inclined from top to bottom along the rotation direction, the lower end of the pushing inclined surface is connected with a lower end surface of the unlocking ring 27 to form an unlocking cavity 28 above the lower end surface, and an upper abutting surface 321 is further arranged at the upper end edge of the pushing inclined surface 32 in the embodiment, so that the unlocking cavity 28 forms a trapezoid cavity. The spring-loaded pin is a spring-loaded ball 29 which is disposed in a hole 273 in the lower end surface 271 of the release ring 27, with the lower end exposed to the lower end surface under the spring force. In the unlocking process, as shown in fig. 26, the unlocking ring 27 rotates, one unlocking unit of the unlocking ring rotates to a position opposite to the positioning pin 22, the upper end part of the positioning pin 22 extending out of the upper end surface of the turntable 20 is in the unlocking cavity 28, the upper end of the positioning pin firstly abuts against the upper abutting surface 321 as shown in fig. 26A, then the upper end part of the positioning pin 22 contacts with the inclined surface 32 as shown in fig. 26B, and the inclined surface 32 continuously presses the positioning pin 22 downwards along with the rotation of the unlocking ring 27 until the positioning pin 22 moves out of the unlocking cavity and is positioned below the lower end surface of the unlocking ring as shown in fig. 26C, and the primary unlocking is completed at this time; then, when the latch 29 on the unlocking ring 27 is rotated to the position of the pin hole 25, the latch 29 is pressed into the pin hole 25 and the positioning pin 22 is pressed down, as shown in fig. 26D, the positioning pin 22 is completely pressed out of the pin hole 25, and the turntable 20 can be rotated, at this time, the secondary unlocking is completed.

In this embodiment, two pin holes 25 are provided, one pin hole 25 on the turntable of the seat bottom being located above the locating pin 22 during normal forward travel, so that the seat is positioned in the forward position, and the other pin hole 25 being located above the locating pin 22 when the seat is rotated 180 ° against the rearward direction, so that the seat is positioned in the rearward position. Thus, the driving mode of the original wheelchair can be changed through 180-degree rotation of the seat, for example, the original rear driving mode is changed into a front driving mode, or the original front driving mode is changed into a rear driving mode, and the driving operation of the wheelchair can be greatly facilitated. The pin holes 25 are not limited to the above two positions, and if the seat needs to be rotated to other positions and positioned at the rotated positions, the corresponding pin holes 25 may be provided at the corresponding positions of the turntable, so that the corresponding pin holes are above the positioning pins 22 when the seat is rotated to the desired positions, and are inserted and locked by the positioning pins 22.

As shown in fig. 27, the unlocking ring 27 is rotated by manual driving, for which purpose a transmission arm 34 for transmitting driving force is provided on the unlocking ring 27 side, a limit slot 26 opened in the circumferential direction is provided on the turntable 20 side, and the transmission arm 34 extends out of the limit slot 26 from the turntable 20 to be connected with a corresponding operating lever (not shown).

The upper end surface of the unlocking ring 27 is provided with four limit protrusions 33, the seat bottom is provided with limit grooves 35 (shown in fig. 3) which are matched with the limit protrusions 33 and used for limiting the rotation path of the unlocking ring 27, and the unlocking ring 27 is rotatably connected to the seat bottom through the arrangement of the limit protrusions 33 in the limit grooves 35 and is close to or attached to the upper end surface of the turntable to rotate. As shown in fig. 3, the limiting groove 35 in this embodiment is composed of a limiting circular wall 351 and four circular arc walls 352 distributed along a circumference, the circular arc walls 352 are located inside the circular wall 351, and the arc length of the circular arc walls 352 is greater than the arc length of the interval between two adjacent circular arc walls.

In order to ensure that the unlocking ring 27 is stably supported on the turntable 20 and that the lower end surface of the unlocking ring 27 is close to or attached to the upper end surface of the turntable 20, four elastic pressing pins are provided at the upper end of the unlocking ring 27. The resilient compression pin of this embodiment is a spring-loaded ball, four spring pressing pin placing holes 353 are provided in the seat bottom portion corresponding to the four spring pressing balls, the elastic pressing pin placing holes 353 of the present embodiment are provided outside each circular arc wall 352, and as shown in fig. 23, the lower ends of the striker are exposed outside the elastic pressing pin placing holes 353 and are elastically pressed on the upper end side of the unlocking ring 27.

After the unlocking is completed once, the unlocking ring 27 returns to the initial state, in this embodiment, four torsion springs 36 are adopted, the four torsion springs 36 are uniformly distributed in the unlocking ring and sleeved on a column 63 at the bottom of the seat, referring to fig. 23, one end of each torsion spring is fixed on the turntable, and the other end of each torsion spring passes through a neutral space formed by two adjacent circular arc walls to press against a limiting protrusion 33 on the unlocking ring 27. The unlocking ring 27 rotates under the transmission of the transmission arm 34 and makes the torsion spring twist, and after the transmission of the transmission arm 34 is finished, the unlocking ring 27 returns under the torsion force of the torsion spring.

Example 6

The present embodiment is an embodiment in which a switch of a rotary electric machine in a gear drive unit is provided on the basis of embodiment 5 described above. The power switch of the driving motor adopts a proximity switch, and the proximity switch 196 is arranged below the positioning pin 22 in the locking mechanism, as shown in fig. 28, and the proximity switch is triggered or closed by the upward and downward movement of the positioning pin 22. When the rotary table is unlocked, the rotary table is sequentially pushed downwards by the pushing inclined plane 32 and the elastic pressing pin 272, the pin hole 25 of the rotary table is completely pushed out, the positioning pin 22 is positioned at the lowest end position, the position just triggers the proximity switch 196 of the driving motor, the rotary motor starts to work, and the corresponding gear driving unit is driven to move, so that the gear on the rotary shaft is driven, and the rotary shaft which is not limited by the positioning pin at the moment is rotated; after the rotating shaft rotates 180 degrees, the other pin hole on the rotating shaft is just positioned at the position of the positioning pin, the positioning pin is sprung into the pin hole, the lower end of the positioning pin is separated from the proximity switch, as shown in fig. 29, and the rotating motor stops working.

Example 7

As an alternative structure, as shown in fig. 30, the rotor 9 in the above embodiments may be composed of a tapered roller bearing 91 and a connecting sleeve 92, the tapered roller bearing 91 is fixed on the rotating shaft by the inner ring, the connecting sleeve 92 is fixed on the outer ring 10 of the tapered roller bearing, and the profile of the connecting sleeve 92 is a non-circular star shape composed of an arc surface 922 and a plane 921; a star-shaped inner cavity matched with the connecting sleeve profile is arranged in the supporting sleeve 31; when the seat is inserted into the supporting sleeve 31 through the rotating shaft and the connecting sleeve 92 is arranged in the inner cavity of the supporting sleeve 31, the connecting sleeve 92 does not rotate relative to the supporting sleeve 31. When the seat rotates, the rotating shaft and the tapered rollers of the tapered roller bearing 91 connected to the rotating shaft rotate relative to the outer ring 10, the connecting sleeve 92 and the supporting sleeve 31 of the bearing, thereby realizing the rotation connection between the seat and the vehicle body.

Example 8

As an alternative structure, the rotor 29 may be formed as a cylindrical solid block rotor as shown in fig. 31; or can be made into a cone frustum-shaped solid block rotor, as shown in fig. 32; or may be formed as a solid block of spherical shape, as shown in fig. 33. The rotating body of the solid block is rotatably supported in the corresponding supporting sleeve A, and the inner cavity of the corresponding supporting sleeve is matched with the shape of the rotating body supported in the corresponding supporting sleeve A.

The rotating module provided by the invention can realize rotatable connection between the seat and the wheelchair body, is convenient for a user to freely switch between front drive and rear drive through rotating the seat, improves the trafficability of the wheelchair on a complex road surface, can rapidly realize separation and combination of the seat and the wheelchair body as required, and increases the portability of the wheelchair.

Claims (18)

1. The utility model provides a rotary module of wheelchair for the seat of wheelchair rotates its characterized in that relative automobile body of wheelchair: the module comprises a rotating shaft, a rotating body, a gear, a base and a gear driving unit, wherein the upper end of the rotating shaft is fixed at the bottom of the seat, the rotating body and the gear are arranged on the rotating shaft, the base is arranged on a vehicle body, and a supporting sleeve is arranged on the base; the seat is connected with the car body in a rotatable manner through the rotary shaft inserted into the supporting sleeve, the rotating body on the rotary shaft is arranged on the supporting sleeve, and the gear on the rotary shaft is meshed with the gear driving unit; the rotating module further comprises a multi-core plug and a multi-core socket, wherein the multi-core plug and the multi-core socket are respectively connected with multiple paths of signal wires, the multi-core plug or the multi-core socket is concentrically connected with the rotating shaft at the lower end of the rotating shaft, the corresponding multi-core socket or the multi-core plug is concentrically connected with the supporting sleeve on the base below the supporting sleeve, and the corresponding multiple paths of signal wires are electrically connected one by one when the multi-core plug and the multi-core socket are mutually inserted;

The gear driving unit comprises a driving motor, a rack, a screw and a nut, wherein the rack is arranged in the base in a sliding manner and meshed with a gear on the rotating shaft, the screw is connected to the rotating shaft of the motor, and the nut is in spiral connection with the screw and is connected with the rack;

the base is designed as a section bar and comprises an upper end plate, a containing cavity, a positioning rib plate and a guide rib, wherein the upper end plate, the containing cavity, the positioning rib plate and the guide rib are arranged along the length direction of the section bar, the containing cavity is arranged below the upper end plate, the positioning rib plate is arranged in the containing cavity, the guide rib plate is arranged below the positioning rib plate, a supporting hole is formed in the upper end plate, and a socket sleeve hole concentric with the supporting hole is formed in the bottom surface of the containing cavity; the supporting sleeve is fixed in the supporting hole and axially positioned by the positioning rib plate, the driving motor is arranged in the accommodating cavity, the rack is provided with a guide groove matched with the guide rib, the guide groove is arranged on the base in a sliding manner through the jogging of the guide groove and the guide rib, and the multi-core socket or the multi-core plug is arranged in the socket sleeve hole.

2. The rotary module of claim 1, wherein: the rotating module further comprises an axial limiting mechanism, the axial limiting mechanism comprises an elastic plug pin and an annular groove arranged in the circumferential direction of the rotating shaft, the elastic plug pin is arranged on the base in an elastic moving mode, one end portion of the elastic plug pin is elastically inserted into the annular groove of the rotating shaft, and the axial movement of the rotating shaft is limited.

3. The rotary module of claim 1, wherein: the base is swingably provided on a vehicle body.

4. A rotary module according to claim 2 or 3, characterized in that: the base also comprises a swinging shaft hole and a connecting shaft hole which are arranged along the length direction of the profile, wherein the swinging shaft hole is arranged at the lower end of the accommodating cavity, the connecting shaft hole is at least arranged at one side of the outer side of the upper end of the accommodating cavity, a swinging shaft and a connecting shaft are respectively arranged in the swinging shaft hole and the connecting shaft hole, two ends of the swinging shaft are arranged on the base, the base is rotatably arranged on the vehicle body through the swinging shaft, one side corresponding to the connecting shaft hole is provided with a connecting notch which vertically penetrates through the connecting shaft hole, and the end part of a driving rod for pushing the base to swing is arranged in the connecting notch and hinged with the base through the connecting shaft arranged in the connecting shaft hole; the outer side wall of the accommodating cavity of the base and the guide ribs on the corresponding sides are provided with through mounting holes, and the elastic plug pins are arranged on the base through the mounting holes.

5. The rotary module of claim 4, wherein: the base also comprises two plane positioning ribs arranged at the lower end of the accommodating cavity and a plane at the lower end of the swing shaft hole along the length direction of the section bar, and the plane is coplanar with the positioning ribs.

6. The rotary module of claim 1, wherein: the multi-core plug or the multi-core socket is connected in the cavity in the center of the rotating shaft through a corresponding plug sleeve or socket sleeve respectively, and corresponding multi-channel signal wires are led out through the cavity in the center of the rotating shaft.

7. The rotary module of claim 6, wherein: the multi-core plug at least comprises a plug body and a plurality of first electric connection terminals which are axially arranged along the plug body and mutually insulated; the multi-core socket at least comprises a socket body and a plurality of second electric connection terminals which are axially arranged along the socket body and mutually insulated, and when the multi-core plug and the multi-core socket are mutually rotatably inserted, the first electric connection terminals and the second electric connection terminals on the same axial position are mutually elastically pressed and electrically connected.

8. The rotary module of claim 1, wherein: the rotating module also comprises a circumferential locking mechanism for locking the seat in a rotating position and an unlocking mechanism for unlocking the seat locked in the rotating position;

the circumferential locking mechanism comprises a turntable which is arranged at the bottom of the seat and is provided with at least two pin holes and an elastic locating pin which can elastically move up and down, the elastic locating pin is arranged on the base and is positioned on the rotating path of the pin holes, the pin holes on the turntable rotate to the positions of the elastic locating pins, the elastic locating pin is inserted into the pin holes, and the upper end part of the elastic locating pin extends out of the upper end face of the turntable, so that the turntable is fixed;

The unlocking mechanism comprises an unlocking ring and at least two unlocking units, the unlocking ring is rotatably arranged above the turntable, the lower end face of the unlocking ring is close to or attached to the upper end face of the turntable, and the unlocking units are arranged on the unlocking ring and correspond to the circumferential direction of the elastic locating pin; each unlocking unit at least comprises a pushing inclined plane and an elastic pressing pin, wherein the pushing inclined plane and the elastic pressing pin are arranged front and back relative to the rotation direction of the unlocking ring, the pushing inclined plane is obliquely arranged from high to low along the rotation direction, the low end of the pushing inclined plane is connected with the lower end surface of the unlocking ring, a hole is formed in the lower end surface, and the elastic pressing pin is arranged in the hole, and the lower end of the elastic pressing pin can be elastically moved to expose the lower end surface.

9. The rotary module of claim 8, wherein: the upper end face of the unlocking ring is provided with a plurality of limit protrusions distributed along the circumferential direction, the seat bottom is provided with a limit groove in a matched mode, the unlocking ring is arranged in the limit groove through the limit protrusions to be close to or attached to the upper end face of the rotary table to rotate, and the rotation center is concentric with the rotation center of the rotary table.

10. The rotary module of claim 9, wherein: the limiting groove consists of a limiting annular wall and a plurality of circular arc walls distributed along a circumference, and the circular arc walls are positioned on the inner side of the annular wall; the arc length of the arc walls is greater than the arc length of the interval between two adjacent arc walls, an elastic pressing pin placing hole is arranged on the outer side of each arc wall, an elastic pressing pin is arranged in the placing hole, and the elastic pressing pin presses the unlocking ring, so that the lower end face of the unlocking ring is close to or attached to the upper end face of the turntable.

11. The rotary module of claim 10, wherein: the unlocking mechanism further comprises a plurality of torsion springs which enable the unlocking ring to rotate and return, the torsion springs are uniformly distributed in a circumferential direction in the unlocking ring, one end of each torsion spring is fixed on the bottom of the seat, and the other end of each torsion spring penetrates through a neutral position formed by two adjacent circular arc walls at intervals to touch and press a limiting protrusion on the unlocking ring.

12. The rotary module of claim 10, wherein: the elastic pressing pin is a spring ball provided with a compression spring.

13. The rotary module of claim 8, wherein: one side of the unlocking ring is provided with a transmission arm for controlling the unlocking ring to rotate, a limiting hole groove is formed in the corresponding position of the rotary disc, and the transmission arm penetrates through the limiting hole groove and extends out of the rotary disc.

14. The rotary module of claim 8, wherein: the base is provided with a positioning pin seat for placing the elastic positioning pin; the elastic locating pin consists of a locating pin, a spring retainer ring and a spring, wherein the spring retainer ring is clamped on the locating pin, the spring is arranged in a locating pin seat and sleeved with the locating pin, and the free end of the spring retainer ring is abutted against the spring retainer ring, so that the locating pin returns.

15. The rotary module of claim 14, wherein: the power switch of the driving motor in the gear driving unit is set as a proximity switch, the proximity switch is arranged below the positioning pin, when the positioning pin is completely pressed out of the turntable, the lower end of the positioning pin triggers the proximity switch, the driving motor works, and the rotating shaft rotates; the locating pin returns to reinsert the pinhole, and the lower extreme and the proximity switch of locating pin separate, driving motor stop work, and the pivot stops rotating.

16. The rotary module of claim 1, wherein: the rotating body is a tapered roller bearing rotating body and comprises a bearing inner ring connected to the rotating shaft, a retainer connected to the bearing inner ring and tapered rollers capable of being supported on the retainer; the bearing sleeve is a bearing outer ring of the tapered roller bearing; the seat is inserted into the bearing outer ring through the rotating shaft, and the tapered roller bearing rotating body is arranged on the bearing outer ring and is rotationally connected with the vehicle body.

17. The rotary module of claim 1, wherein: the rotor comprises a bearing and a connecting sleeve, the bearing is connected to the rotating shaft through an inner ring of the bearing, and the connecting sleeve is connected to an outer ring of the bearing and is non-circular in profile; an inner cavity matched with the profile of the connecting sleeve is arranged in the supporting sleeve; the seat is inserted into the supporting sleeve through the rotating shaft, and the connecting sleeve is arranged in the inner cavity of the supporting sleeve and is rotationally connected with the chassis.

18. The rotary module of claim 1, wherein: the rotary body is a cylindrical rotary body or a truncated cone-shaped or hemispherical rotary body, and inner cavities of the supporting sleeves corresponding to the cylindrical rotary body, the truncated cone-shaped and the hemispherical rotary body are respectively matched with the rotary body and are rotatably arranged in the supporting sleeves matched with the corresponding rotary body in shape.