WO2014032380A1

WO2014032380A1 - Wheel set

Info

Publication number: WO2014032380A1
Application number: PCT/CN2012/087138
Authority: WO
Inventors: 林正浴
Original assignee: 上海欧芮柯医疗设备有限公司
Priority date: 2012-08-27
Filing date: 2012-12-21
Publication date: 2014-03-06
Also published as: CN202863031U

Abstract

A wheel set comprises a main shaft cap (7), a wheel bracket (15) and a wheel (16). A cam (3) is provided on the upside of the main shaft cap (7). An adjusting nut (4) is provided in the main shaft cap (7). The upper end of adjusting nut (4) is in contact with the cam (3) through a pressure spring (5). A main shaft (19) is fixedly connected to the lower end of the adjusting nut (4). The main shaft (19) passes through the junction of the main shaft cap (7) and the wheel bracket (15). A brake member (20) is provided on the lower end of the main shaft (19). The brake member (20) is adjacent to the edge of the wheel (16). A stop disc (11) is provided on the lower portion of the main shaft (19). A plurality of circumferentially equispaced protrusions are provided on the lower end of the stop disc (11). The wheel bracket (15) is provided with a stop plate (12). The stop plate (12) is provided with a plurality of holes which are meshed with the plurality of protrusions on the stop disc (11). The main shaft (19) is driven when the cam is rotating, so that the wheel set achieves three functions of freely turning, freely rotating and locking. The stop disc (11) is driven to move up and down by rotating the cam (3), so that the disc engages with or separates from the stop plate (12) and the wheel bracket (15) to achieve forgoing three functions, thereby making the wheel set operating conveniently and controlling accurately.

Description

Wheel set

Technical field

The invention belongs to the technical field of transmission mechanisms, in particular to a wheel set. BACKGROUND OF THE INVENTION A conventional wheel set structure generally consists of a main shaft body and a rotating wheel rotatably mounted thereon. There is a brake mechanism between the main shaft body and the rotating wheel. The braking mechanism is manual or foot-operated, and the rotating wheel can not only scroll. It is also possible to perform a 360-degree rotation about the axis of the main shaft body to make the wheel set multi-directional rotation. The brake mechanism of the conventional wheel structure can only brake the rolling direction of the runner, and can not brake the directional rotation of the runner, so that the wheel set cannot be really fixed in one place, which may cause a safety accident.

In order to overcome the above problems, the conventional wheel set has been improved in the prior art, and the directional rotating member for limiting the wheel has been added, such as the Chinese patent "improved wheel set structure" (patent number: 200520011355. 7) through a compression The piece achieves a fixed orientation of the wheel. However, the pressing member is disposed above the runner, and is controlled by the foot, which is inconvenient to operate and has a single function. Users often forget to use this part and only use it when there is a wheel set slip. Another example is the Chinese patent "The caster structure that restricts rotation and steering at the same time" (Patent No.: 200720189861. 4) is controlled by a rod, and is also operated by pedaling. In addition, in the above two solutions, the brake lock of the runner can only achieve the simultaneous locking of the rotation and the steering, and the need to lock only the steering in reality cannot be realized.

Summary of the invention

In order to solve the above technical problems, the present invention provides a wheel set, through a cam and a rotating disk, in order to realize three working states of free running, turning steering locking and steering locking of the wheel set. The technical solution adopted by the present invention is: a wheel set comprising a spindle cover, a spindle tube, a runner bracket disposed at a lower end of the spindle tube, and a runner disposed on the runner bracket, wherein: the spindle cover a cam is disposed on the upper portion, and an adjusting nut is disposed in the main shaft cover, wherein the adjusting nut has an upper end contacting the cam through a pressure spring, and a main shaft is fixedly connected to a lower end of the adjusting nut, The spindle passes through the spindle tube and the runner branch a joint of the frame, a brake member is disposed at a lower end of the main shaft, the brake member is adjacent to an edge of the rotating wheel; a stop plate is disposed at a lower portion of the main shaft, and a plurality of circumferential ends are disposed at a lower end of the retaining plate a uniform protrusion, a stopper piece is disposed on the wheel bracket, and the stopper piece is provided with a plurality of holes, and the plurality of holes correspond to a plurality of protrusion positions on the stopper plate, The stop piece can be linearly moved up and down in the bracket by a pressure spring; the cam is provided with two grooves, and the upper ends of the adjusting nut are respectively located at the outermost position of the cam when the cam rotates Driving the spindle in a circle and two grooves causes the wheel set to be in three states: (1) the brake member is released, the stop disk is released, and the wheel set is free to travel; (2) The brake member is loosened, the stop disc is fixed at a certain position of the runner bracket, the wheel set is traveling in a fixed direction; (3) the brake member stops the runner, and the stop The movable disk is fixed, and the wheel set is stopped.

Further, the stop disk is integral with the main shaft.

Further, the stopper piece has a circular shape or a waist shape.

Further, a threaded opening is provided on one or four sides of the spindle tube, and a screw is disposed in the threaded opening.

Further, an upper portion of the cam is provided with a limit pin.

Further, a bracket housing is disposed outside the bracket, and a tire casing is disposed on the runner.

Further, a rivet nut and a limit spring are disposed on the stopper piece.

The beneficial effects of the invention are:

(1) The locking control of the wheel set is realized by the transmission of the cam and the main shaft. All operations can be completed by one hand, and the operation is quick and simple;

(2) the structure of the stop disc causes the wheel set to be locked at a plurality of steering angles;

(3) The limit pin on the cam makes the positioning more precise;

(4) The hand screw allows the multiple wheels to work in the same state. (5) The rivet nut and the limit spring on the stop piece make the engagement of the stop plate and the stop piece more reliable.

Figure 1 is a schematic view of an exploded structure of the present invention;

Figure 2 is a front elevational view of the present invention;

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

Figure 4 is a B-direction view of Figure 2;

Figure 5 is a cross-sectional view taken along line C-C of Figure 4;

Figure 6 is a partial enlarged view of D in Figure 5.

The numbers in the drawings are:

I. fixed ring; 2. limit pin;

3. Cam; 4. Adjust the nut;

5. Pressure spring; 6. Spindle tube;

7. Spindle cover; 8. Cap;

10. Bearings;

I I. Stop plate; 12. Stopper;

13. Rivets; 14. Bracket housing;

15. bracket; 16. runner;

17. Tires; 18. bearings;

19. Spindle; 20. Brake;

21. Pressure spring; 22. Hand screw.

detailed description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of a wheel set of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to Figures 1, 2, 4, the caster is formed by the main shaft 19 in the upper spindle cover 7 and the upper bracket 15 Further, a runner 16 is disposed under the bracket 15, and a brake member 20 is disposed under the spindle 19 to realize rotational locking of the runner 16. The lower portion of the spindle 19 is further provided with a stop plate 11, and the bracket 15 is provided with a stopper 12 The stop disc structure realizes the steering lock of the runner. The details are described below.

Referring to Figures 1, 3, 5, 6, the upper end of the spindle 19 is fixedly connected to the adjusting nut 4 by a screw. The upper end of the adjusting nut 4 forms a conical head, and the adjusting nut 4 is sheathed with a pressure spring 5, the upper end of the compression spring 5 The adjustment nut 4 is stopped, the lower end ends at a spindle tube 6, the cam 3 is disposed above the adjusting nut 4, and the lower portion of the cam 3 has two recesses, and the tapered head of the adjusting nut 4 cooperates with the recess, the cam 3 The upper part is provided with a groove, and a limit pin 2 is arranged in the groove. On the outer side of the cam 3, the adjusting nut 4, the pressure spring 5, and the main shaft tube 6, there are two spindle covers 7, which are arranged in the corresponding slots of the spindle tube 6, and the cams 3 are arranged in the corresponding circular shape of the spindle cover 7. In the groove, the limit pin 2 is fixed to the spindle cover 7, the cam 3 is rotated within a range defined by the limit pin 2, and a fixed ring 1 is provided above the cam 3 to fix the two spindle covers 7 as a whole. The lower end of the main shaft tube 6 is riveted to the bracket 15 through the bearing 10, the main shaft 19 passes through the joint, the retaining disc 11 is disposed at the lower portion of the main shaft 19, and the stopper piece 12 is mounted on the bracket 15, and the retaining disc 11 is disc-shaped. The main shaft 19 is tightly coupled with the main shaft 19 or integrated with the main shaft 19. The stopper piece 12 is fixed on the bracket 15, and the bracket 15 can be linearly displaced up and down, and the linear displacement distance is within a limited range. A limit spring 21 is mounted on the lower surface, and a plurality of protrusions are arranged on the lower surface of the stopper disk 11. The protrusions are uniformly distributed on the same circumference, and the protrusions are fixed on the stopper disk 11 by welding or the like, and the disk 11 can also be stopped. In one piece, a plurality of holes are formed in the stopper piece 12, and the position of the hole is engaged with the position of the protrusion, and the hole may be a through hole or a blind hole. The stopper piece 12 can also be formed into a waist shape formed by rounding or both sides. The lower end of the main shaft 19 passes through the intermediate hole of the stopper piece 12. At the lower end of the main shaft 19, a brake member 20 is fixedly fixed by a fastener, and the brake member 20 is made of a wear resistant material. The bracket 15 has a fork shape, and the lowermost end thereof is mounted with a rotating wheel 16 via a rotating member such as a bearing 18. A rubber casing 17 is disposed on the outer circumference of the runner 16, and a bracket shell 14 is disposed on the outer side of the bracket 15 by a fixing member such as a rivet 13 and the bracket shell 14 covers the half runner. Used to prevent foreign matter from entering the wheel.

Continuing to refer to FIG. 5 and 6, the working process of the wheel set is that the upper part of the main shaft cover 7 of the caster is mounted on the cart, and an adjusting rod is arranged in the center hole of the cam 3. The center hole of the cam is a hexagon socket, and the adjusting rod Also for the hexagonal rod, a deep groove and a shallow groove are provided on the outer circumference of the cam 3. When the adjustment lever adjusts the cam 3 so that the shallow groove is directly below the cam 3, the adjusting nut 4 is subjected to the thrust of the pressure spring 5. The tapered head is inserted into the shallow groove. At this time, the main shaft 19 also rises following the adjusting nut 4. After the main shaft 19 rises, the brake member 20 and the rotating wheel 16 are disengaged, and the stopping plate 11 and the stopper piece 12 on the main shaft are disengaged. Disengaged, the user can control the wheel set to travel freely and freely. When the adjusting lever adjusts the cam 3 so that the deep groove is directly below the cam 3, the adjusting nut 4 is subjected to the combined force of the cam 3 and the pressure spring 5, and the tapered head is inserted into the deep groove, at which time the spindle 19 also follows. The adjusting nut 4 rises, and after the main shaft 19 rises, the retaining disk 11 on the main shaft 19 rises in contact with the upper surface of the rotating bracket 15, and the brake member 20 rises off the rotating wheel, and the rib on the retaining disk 11 is under the action of the pressure spring 5. Fully in contact with the upper surface of the rotating bracket, the ribs on the upper surface of the retaining disc 11 fall into the two slots of the runner bracket 15 by the inertia of the wheel. Since the retaining disc 11 and the runner bracket are locked, the runner can only It is straight in the direction of the wheel diameter and cannot be turned. When the adjustment lever adjusting cam 3 causes the maximum outer circumference of the cam 3 to be located directly below the cam 3, the main shaft 19 pushes the stop disk 11 downwardly into engagement with the stopper piece 12, and under the action of the pressure spring 21, the two are fully engaged. The wheel is prevented from turning, and at the same time, the brake member 20 is stopped on the runner 16, and the runner 16 is locked. At this time, the runner 16 can neither rotate nor turn, and the wheelset stops at a fixed place. In order to ensure the three functions of the wheel are secure; to prevent the rotation of the spindle cover, a side hole 9 is opened in the spindle cover 7, and the side hole 9 is tapped with a thread, and the spindle cover 7 and the spindle tube 6 are locked by a hand screw 22 to ensure that the spindle cover 7 and the spindle tube 6 are locked. The position between the spindle cover and the spindle tube is fixed.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings should also be considered. It is the scope of protection of the present invention.

Claims

WO 2014/032380 Claim PCT/CN2012/087138

A wheel set, comprising a spindle cover, a spindle tube, a runner bracket disposed at a lower end of the spindle tube, and a runner disposed on the runner bracket, wherein: the upper portion of the spindle cover is provided with a cam, An adjusting nut is disposed in the spindle cover, the adjusting nut is brought into contact with the cam by a pressure spring, and a main shaft is fixedly connected to the lower end of the adjusting nut, and the spindle passes through the spindle tube and a joint of the runner bracket, a brake member is disposed at a lower end of the spindle, the brake member is adjacent to an edge of the runner; a stop plate is disposed at a lower portion of the spindle, and a plurality of edges are disposed at a lower end of the stop plate a circumferentially uniform protrusion, a stop piece is disposed on the wheel bracket, the stop piece is provided with a plurality of holes, and the plurality of holes are engaged with a plurality of protrusion positions on the stop plate The stopping piece can be linearly moved up and down in the bracket by a pressure spring; the cam is provided with two grooves, and the upper ends of the adjusting nuts are respectively located on the cam when the cam rotates Extraterrestrial Driving the spindle in a circle and two grooves causes the wheel set to be in three states: (1) the brake member is released, the stop disk is released, and the wheel set is free to travel; (2) The brake member is loosened, the stop disc is fixed at a certain position of the runner bracket, and the wheel set is driven in a fixed direction; (3) the brake member stops the runner, and the stop The movable disk is fixed, and the wheel set is stopped.

2. A wheel set according to claim 1, wherein: said stop disk is integral with said main shaft.

3. A wheel set according to claim 1, wherein: said stop piece is circular or waist shaped.

A wheel set according to any one of claims 1 to 3, characterized in that a threaded opening is provided on one or four sides of the main shaft tube, and a screw is provided in the threaded opening.

The wheel set according to any one of claims 1 to 3, characterized in that: the upper portion of the cam is provided with a limit pin.

The wheel set according to any one of claims 1 to 3, characterized in that: WO 2014/032380 Claim PCT/CN2012/087138 A two-piece snap-on bracket housing is provided externally, on which a tire casing is arranged.

A wheel set according to any one of claims 1 to 3, characterized in that a rivet nut and a limit spring are provided on the stopper piece.