CN111942079A

CN111942079A - NFC inductive control brake caster

Info

Publication number: CN111942079A
Application number: CN202010977234.7A
Authority: CN
Inventors: 黄锡全; 卢中华
Original assignee: Zhongshan Dajin Caster Co ltd
Current assignee: Zhongshan Dajin Caster Co ltd
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2020-11-17

Abstract

The invention relates to a caster, in particular to an NFC inductive control brake caster. This truckle includes the wheel carrier along transversely being equipped with the center pin, the locking motor, the brake pads, the brake lever, spring and the automatically controlled module of NFC, the wheel carrier left and right sides is equipped with the limit wheel that passes the center pin respectively, the inboard of limit wheel is equipped with the internal tooth, the outside at the brake lever is cup jointed to the spring, the brake lever is equipped with along its convex horizontal pole of side, the table side of brake pads is equipped with a plurality of external teeth, the dorsal part of brake pads and the non-extrusion of spring hold the butt from top to bottom, but the automatically controlled module of NFC is connected brake lever and locking motor transmission with the locking motor electricity is connected, so that the spring can rotate and release along with the horizontal pole. According to the invention, the trundles are controlled by NFC induction, reliable braking and locking directions can be rapidly realized for the trundles, and the realization process is simple, flexible and good in safety.

Description

NFC inductive control brake caster

Technical Field

The invention relates to a caster, in particular to an NFC inductive control brake caster.

Background

In the prior art, four feet of a sickbed are respectively provided with a caster wheel to facilitate the movement of the sickbed, and the brake mechanisms are arranged at the caster wheels to realize the braking function through external force when in need, so that the sickbed is fixedly parked at the needed position. The existing caster braking mechanisms are of two types, one type is that four casters of a sickbed are respectively provided with an independent braking key, and when braking is needed, the four casters can go to four corners of the sickbed to brake; the other is a central control caster, namely the front two casters are connected by a connecting rod, the rear two casters are also connected by a connecting rod, the middle of the two connecting rods are connected by a connecting rod, and a brake key is added in the middle to realize the function of central control brake; the two brake structures have the defects that the former is troublesome, the latter has high precision requirement and is easy to wear, and after the brake structure is used for a period of time, the problems of inflexible braking, even locking, failure and the like often occur, so that a plurality of troubles are brought to the use of a sickbed.

Disclosure of Invention

The invention provides an NFC inductive control brake caster, which can realize the brake of the caster of a sickbed without manpower through the NFC inductive control brake, thereby overcoming the defects of complicated brake process and manual brake requirement of the caster of the existing sickbed.

In order to achieve the purpose, the invention discloses an NFC inductive control brake caster which comprises a wheel carrier, a locking motor, a brake block, a brake rod, a spring and an NFC electric control module, wherein a central shaft is transversely arranged on the wheel carrier;

the spring is sleeved outside the brake rod, and the brake rod is provided with a cross rod protruding along the side of the brake rod so as to enable the cross rod and one end of the spring to be mutually extruded;

the surface side of the brake block is provided with a plurality of groups of external teeth matched with the internal teeth, and the back side of the brake block is vertically abutted against the non-extrusion end of the spring;

the brake lever is drivingly connected to the locking motor such that the spring is released as the cross bar rotates to engage the brake shoe and push the brake shoe against the inner teeth of the side wheel.

Optionally, a bracket is arranged on the back side of the brake block, a transverse plate is arranged in an inner cavity of the bracket, the brake rod penetrates into the bracket and penetrates through the transverse plate, and the non-extrusion end of the spring is in vertical abutting joint with the bottom side of the transverse plate.

Optionally, the wheel carrier is provided with a support frame for assembling the bracket, and the tail end of the support frame is provided with a mounting opening for assembling a brake block, and the brake block extends along the two sides of the mounting opening and is arranged at the inner sides of the two wheels.

Optionally, the locking motor is provided with a first gear, the end of the brake lever away from the brake block is provided with a second gear, and the first gear and the second gear are meshed with each other.

Optionally, the wheel carrier is provided with an insertion rod cavity along the vertical direction, and a pin rod capable of rotating relative to the wheel carrier is arranged in the insertion rod cavity.

Optionally, the NFC sensing-control brake caster further comprises a transmission rod and a rotation stopping rod, one end of the transmission rod is in transmission fit with the brake block, and the other end of the transmission rod is in transmission fit with the rotation stopping rod, so that the transmission rod drives the rotation stopping rod to approach and lock the pin rod along with the push-up of the brake block.

Optionally, a third gear is disposed on the bottom side of the foot bar, and one end of the rotation stopping bar close to the foot bar is in a pincer shape.

Optionally, the transmission rod includes a clamping portion and a guide portion connected at an obtuse angle, the brake block has a slot, the rotation stopping rod has a guide hole, the clamping portion is obliquely inserted into the slot, and the guide portion is inserted into the guide hole, so that the clamping portion extends out along with the brake block, and the guide portion swings along the direction of the pin rod.

Optionally, a stop lever is disposed at a bottom side of the rotation stop lever, and the guide portion passes through the rotation stop lever along the guide hole and abuts against a surface side of the stop lever.

Optionally, the NFC electronic control module includes an NFC power supply unit and a control unit, the NFC power supply unit is electrically connected to the control unit and the locking motors of the NFC sensing control brake casters, and the control unit is in communication connection with the locking motors of the NFC sensing control brake casters.

The invention has the beneficial effects that: through NFC induction control truckle, can realize reliable braking and locking direction to the truckle fast, and need not the manpower braking, the realization process is simple nimble and the security is good.

Drawings

Fig. 1 is a schematic structural diagram of an NFC inductively controlled brake caster according to an exemplary embodiment of the present invention.

Fig. 2 is a schematic diagram illustrating an NFC control principle of the NFC inductively controlled brake caster provided in the embodiment of fig. 1.

Fig. 3 is a schematic internal view of the NFC inductively controlled brake caster provided in the embodiment of fig. 1.

Fig. 4 is a schematic diagram illustrating a braking and direction locking principle of the NFC inductively controlled brake caster provided in the embodiment of fig. 1.

Fig. 5 is a schematic structural diagram of the wheel carrier provided in the embodiment of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention will be further described with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 to 5, an NFC sensing-controlled brake caster according to an exemplary embodiment of the present invention mainly includes a wheel frame 10, two side wheels 20, a brake block 30, a locking motor 40, a brake lever 50, a spring 11, and an NFC electronic control module 90, wherein the wheel frame 10 is provided with a central shaft 12 along a transverse direction thereof, the two side wheels 20 are respectively rotatably mounted on left and right sides of the wheel frame 10 through the central shaft 12, and inner teeth 21 are disposed on inner sides of the side wheels 20. NFC inductive control brake truckle mainly is applied to the sick bed of hospital, can realize NFC inductive control braking locking, need not manpower locking.

To achieve brake locking, the brake blocks 30 are driven to extend and retract by the locking motor 40. Specifically, the spring 11 is sleeved outside the brake lever 50, the brake lever 50 is provided with a cross rod 51 protruding along the side of the brake lever, the spring 11 is divided into two sections, one section is a non-extrusion end and is abutted with the back side of the brake block 30 up and down, and the other section is an extrusion end which is far away from the brake block 30 and is extruded and contracted by the cross rod 51 at the non-braking moment; the surface side of the brake block 30 is provided with a plurality of groups of external teeth 31 matched with the internal teeth 21; the brake lever 50 is drivingly connected to the locking motor 40 such that the spring 11 is released or compressed to contract as the cross bar 51 rotates.

The braking principle of the NFC inductive control brake caster is as follows: when the caster wheel is in a non-braking locking state, the cross rod 51 extrudes the extruded end of the spring 11 so as to enable the length of the caster wheel to be contracted, the whole spring 11 can not form thrust on the brake block 30, when the caster wheel enters a braking locking state from the non-braking locking state, the locking motor 40 drives the brake rod 50 to rotate, at the moment, the cross rod 51 rotates along the direction of releasing the extruded end, the length of the extruded end of the spring 11 is shortened, the length of the non-extruded end is lengthened, so that the spring 11 can be in abutting fit with the brake block 30, the brake block 30 is pushed to the inner teeth 21 of the side wheel 20, and the function of braking and locking the; on the contrary, when the caster wheel enters the non-braking locking state from the braking locking state, the locking motor 40 drives the cross rod 51 to rotate along the direction of extruding the extruded end, so that the length of the extruded end of the spring 11 is prolonged but extruded, the length of the non-extruded end is shortened, and the whole spring 11 returns to the state of being incapable of forming thrust on the brake block 30.

Referring to fig. 2, in order to realize the NFC inductive control braking, the locking motor 40 is electrically connected to the NFC electronic control module 90, the NFC electronic control module 90 includes an NFC power-taking unit 91 and a control unit 92, the NFC power-taking unit 91 is electrically connected to the control unit 92 and the locking motors 40 of the NFC inductive control braking casters, and the control unit 92 is communicatively connected to the locking motors 40 of the NFC inductive control braking casters.

During the in-service use, each NFC sensing control brake truckle is installed respectively in four sides of sick bed, and the user accessible is handed NFC terminal and is close to NFC and gets electric unit 91 and the control unit 92, and NFC gets electric unit 91 and gets the back from the NFC terminal and carry out signal amplification to supply power to the control unit 92 and locking motor 40, and control unit 92 obtains braking instruction or removes the braking instruction from the NFC terminal, thereby sends control signal to locking motor 40, so that locking motor 40 rotates or removes the braking direction rotation to the braking direction.

The NFC electronic control module 90 may further include an NFC antenna 93 electrically connected to the control unit 92 for further enhancing the signal receiving capability of the control unit 92.

In this embodiment, the bracket 32 is provided on the back side of the brake pad 30, the transverse plate 33 is provided in the cavity of the bracket 32, the transverse plate 33 partitions the bracket 32 into two cavities, the brake lever 50 is inserted from the bottom of the bracket 32 and penetrates the transverse plate 33, the non-pressing end of the spring 11 is in contact with the bottom side of the transverse plate 33 in the up-and-down direction, the pressing end of the spring 11 is in contact with the bottom of the bracket 32, and the brake pad 30 is pushed toward the side wheel 20 by pressing the transverse plate 33.

Further, in order to prevent the position of the brake block 30 from being deviated, the wheel frame 10 is provided with a support frame 13 for mounting a bracket 32, the end of the support frame 13 is formed with a mounting opening 14 for mounting the brake block 30, the bracket 32 can slide back and forth along the support frame 13, the brake block 30 moves along the bracket 32 in the mounting opening 14, and the brake block 30 extends along both sides of the mounting opening 14 to the inside of the wheels 20, so that the brake block 30 can brake and lock the wheels 20 at the same time.

In this embodiment, the locking motor 40 is provided with a first gear 41, the end of the brake lever 50 away from the brake block 30 is provided with a second gear 52, the first gear 41 and the second gear 52 are engaged with each other, and the locking motor 40 and the brake lever 50 are in driving fit through the first gear 41 and the second gear 52, so that the brake lever 50 can rotate in two opposite directions.

Furthermore, the wheel frame 10 is provided with a pin cavity 15 along the vertical direction, a pin rod 16 is arranged in the pin cavity 15, the pin rod 16 is used for connecting a bed foot through a pin plate, and the pin rod 16 can rotate relative to the wheel frame 10, so that the NFC inductive control brake caster has a universal wheel function.

To achieve the electrical locking orientation, the NFC inductively controlled brake caster further comprises a transmission rod 60 and a rotation stop rod 70, wherein one end of the transmission rod 60 is in driving engagement with the brake shoe 30, and the other end of the transmission rod 60 is in driving engagement with the rotation stop rod 70, such that the transmission rod 60 pushes up with the brake shoe 30 to drive the rotation stop rod 70 to approach and lock the pin 16. Specifically, the transmission rod 60 includes a blocking portion 61 and a guide portion 62 connected at an obtuse angle, the brake block 30 is provided with a slot 34, the rotation-stopping rod 70 is provided with a guide hole 71, the blocking portion 61 is obliquely inserted into the slot 34, and the guide portion 62 is inserted into the guide hole 71, so that the blocking portion 61 extends out along with the push of the brake block 30, thereby the guide portion 62 swings along the direction of the pin rod 16; the rotation preventing rod 70 has a stopper rod 80 on the bottom side thereof, and the guide portion 62 passes through the rotation preventing rod 70 along the guide hole 71 and abuts against the front side of the stopper rod 80.

The principle of the locking direction of the NFC inductive control brake caster is as follows: when the brake block 30 is pushed up to the side wheel 20 to generate a braking effect, the blocking part 61 slides out along the inclined insertion direction part of the brake block 30 along with the pushing up of the brake block, the guide block connected with the blocking part 61 at an obtuse angle slides out along the blocking part 61 to swing downwards, the downward swinging tendency of the guide block is limited under the abutting limiting action of the limiting rod 80, and then the guide block swings in the horizontal direction, so that the rotation stopping rod 70 is shifted to move towards the pin rod 16, the third gear 17 is arranged at the bottom side of the pin rod 16, one end of the rotation stopping rod 70 close to the pin rod 16 is in a clamp shape, and the rotation stopping rod 70 is meshed and locked with the third gear 17 along with the approach of the rotation stopping rod 70, and the pin rod 16 is locked in the rotating direction.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The NFC sensing and controlling brake caster comprises a wheel carrier (10) which is transversely provided with a central shaft (12), wherein side wheels (20) penetrating through the central shaft (12) are respectively arranged on the left side and the right side of the wheel carrier (10), inner teeth (21) are arranged on the inner sides of the side wheels (20), the NFC sensing and controlling brake caster is characterized by further comprising a brake block (30), a locking motor (40), a brake rod (50), a spring (11) and an NFC electric control module (90) which are assembled on the wheel carrier (10), and the NFC electric control module (90) is electrically connected with the locking motor (40);

the spring (11) is sleeved outside the brake rod (50), and the brake rod (50) is provided with a cross rod (51) protruding along the side of the brake rod, so that the cross rod (51) and one end of the spring (11) are mutually extruded;

the front side of the brake block (30) is provided with a plurality of groups of external teeth (31) matched with the internal teeth (21), and the back side of the brake block (30) is vertically abutted with the non-extrusion end of the spring (11);

the brake lever (50) is in transmission connection with the locking motor (40) so that the spring (11) can be released along with the rotation of the cross rod (51) to be in press fit with the brake block (30) and push the brake block (30) to the inner teeth (21) of the side wheel (20).

2. The NFC inductive-control brake caster according to claim 1, wherein a bracket (32) is arranged on the back side of the brake block (30), a transverse plate (33) is arranged in an inner cavity of the bracket (32), the brake lever (50) penetrates into the bracket (32) and penetrates through the transverse plate (33), and the non-extrusion end of the spring (11) is in up-and-down abutting contact with the bottom side of the transverse plate (33).

3. The NFC inductive brake caster according to claim 2, characterized in that the wheel carrier (10) is provided with a support frame (13) for mounting a bracket (32), the end of the support frame (13) is formed with a mounting opening (14) for mounting a brake block (30), and the brake block (30) extends along the two sides of the mounting opening (14) and inside the two side wheels (20).

4. The NFC inductive-control brake caster according to claim 1, wherein the locking motor (40) is provided with a first gear (41), the end of the brake lever (50) remote from the brake block (30) is provided with a second gear (52), and the first gear (41) and the second gear (52) are meshed with each other.

5. The NFC inductive-control brake caster wheel according to claim 1, wherein the wheel carrier (10) is provided with a peg cavity (15) in a vertical direction, and a pin rod (16) capable of rotating relative to the wheel carrier (10) is arranged in the peg cavity (15).

6. The NFC inductive-control brake caster according to claim 5, further comprising a transmission rod (60) and a rotation stop rod (70), wherein one end of the transmission rod (60) is in transmission fit with the brake block (30), and the other end of the transmission rod (60) is in transmission fit with the rotation stop rod (70), so that the transmission rod (60) drives the rotation stop rod (70) to approach and lock the pin rod (16) along with the push-up of the brake block (30).

7. The NFC inductive brake caster according to claim 6, wherein the foot bar (16) is provided at its bottom side with a third gear (17), and the end of the rotation stop lever (70) near the foot bar (16) is in the shape of a pincer.

8. The NFC inductive brake caster according to claim 6, wherein the transmission rod (60) comprises a detent portion (61) and a guide portion (62) which are connected at an obtuse angle, the brake block (30) is provided with a slot (34), the rotation stop rod (70) is provided with a guide hole (71), the detent portion (61) is obliquely inserted into the slot (34), and the guide portion (62) is inserted into the guide hole (71) so that the detent portion (61) extends out along with the push of the brake block (30) to make the guide portion (62) swing along the direction of the pin rod (16).

9. The NFC inductive-control brake caster according to claim 8, wherein a limit rod (80) is provided on the bottom side of the rotation stop rod (70), and the guide portion (62) passes through the rotation stop rod (70) along the guide hole (71) and abuts against the surface side of the limit rod (80).

10. The NFC inductive-control brake caster according to claim 8, wherein the NFC electronic control module (90) comprises an NFC power-taking unit (91) and a control unit (92), the NFC power-taking unit (91) is electrically connected with the control unit (92) and the locking motors (40) of the NFC inductive-control brake casters respectively, and the control unit (92) is in communication connection with the locking motors (40) of the NFC inductive-control brake casters.