TW202021829A - Caster device for braking wheels by stepping down brake driving plate and releasing braking by stepping down brake release driving plate to achieve easy and instinctive operation - Google Patents

Abstract

A caster device comprises a wheel base, a moving unit, a braking unit and a driving unit. The moving unit is penetrated through the wheel base and includes two rotatable wheels, and each of the wheels is provided with a plurality of first tooth grooves arranged in a surrounding manner at intervals. The braking unit includes a brake base and a first brake rod. The brake base may be moved between a brake position and a movable position with respect to the wheel base. With respect to the movable position, the first brake rod may be moved upward and engaged with a corresponding first tooth groove for the brake position. The driving unit includes a brake driving plate and a brake release driving plate, wherein the brake base may be moved to the brake position by swinging downward the brake driving plate, and the brake base may be moved to the movable position by swinging downward the brake release driving plate.

Description

Caster device

The present invention relates to a caster, in particular to a caster device with a braking function.

Generally, in order to facilitate the movement, several casters are usually installed under the carrier. In order to prevent the platform from moving by itself on uneven ground, casters with brake pedals can be seen on the market. This type of caster allows the user to control the movement of the carrier, and when needed, step on the brake pedal to restrict the rotation of the caster. When the carrier needs to be moved again, it is usually designed to flip the brake pedal in the opposite direction To lift the restriction, flip the brake pedal in the opposite direction with your foot not only does not conform to the user's operating habits, but also often takes more time to try because you don’t know whether the brake pedal is braking or releasing the brake when you step on it. Not intuitive, there is still room for improvement.

The purpose of the present invention is to provide a caster device that can overcome at least one of the disadvantages of the prior art.

Therefore, the caster device of the present invention includes: a wheel base, a moving unit, a braking unit, and a driving unit. The wheel base defines two first shaft holes spaced from left to right and intersecting each other, and an accommodation space above the first shaft hole; the moving unit includes a wheel shaft penetrating through the first shaft holes, and two Two rotating wheels installed at the left and right ends of the axle, each rotating wheel includes an inner side facing the other running wheel, at least one inner side is provided with a plurality of first tooth blocks arranged at intervals around its own axis, Two adjacent first tooth blocks jointly define a first tooth slot; the brake unit is arranged in the accommodating space, and includes a brake seat defining a perforation, and a brake seat inserted between the wheel seat and the perforation The first brake lever, and a first elastic member arranged between the brake seat and the wheel seat, the brake seat can move relative to the wheel seat in a braking position and an active position, when compared to the braking position In the active position, the horizontal position of the brake seat is relatively high, the first brake lever moves upward at the same time and at least one end is embedded in the corresponding first tooth groove, and the first elastic member constantly moves the brake seat to the active position .

The drive unit includes a brake drive plate pivoted on the wheel base, and a brake release drive plate located above the brake drive plate and pivoted on the wheel base. The brake drive plate has a pivot to the wheel base. Connected to the first pivot, a top bracing part located on one side of the brake drive plate and capable of supporting the brake seat, and a first stepping part located on the other side of the brake drive plate and exposed on the wheel seat, and A first fixing portion facing the brake releasing drive plate, the brake releasing drive plate having a second pivot pivotally connected to the wheel base, a second fixing portion that can be buckled with the first fixing portion, and A second stepping portion exposed on the wheel seat. Moving the first stepping portion downward enables the top support portion to prop up the brake seat to move to the braking position, and to make the first fixing portion and the second fixing The parts are buckled with each other, and swinging the second stepping part downward can separate the first fixing part from the second fixing part, and the first elastic member will move the brake seat downward to the movable position.

The effect of the present invention is that by the connection between the brake drive plate and the brake seat, the user can stop the rotation of the wheels by stepping on the brake drive plate, and the user can then Depress the brake release drive plate to release the stop function, the operation is simple and more intuitive.

Referring to FIGS. 1 and 2, an embodiment of the caster device of the present invention includes a wheel base 1, a moving unit 2, a steering unit 5, a braking unit 3, and a driving unit 4.

The wheel base 1 defines an accommodating space 11 and a shaft hole 12 with an opening upward and extending downward to the accommodating space 11.

The moving unit 2 includes a wheel shaft 21 passing through the wheel base 1, and two rotating wheels 22 mounted on the left and right ends of the wheel shaft 21 and capable of rotating. Each wheel 22 includes a wheel 22 facing the other wheel 22 On the inner side surface 221, at least one inner side surface 221 is provided with a plurality of first tooth blocks 222 arranged at intervals around its own axis, and two adjacent first tooth blocks 222 jointly define a first tooth groove 223.

The steering unit 5 penetrates the shaft hole 12, and includes a shaft 51 inserted in the shaft hole 12 and rotatable around its own axis, a bearing 52 sleeved on the shaft 51, and a bearing 52 sleeved on the shaft 51. The shaft 51 is located below the bearing 52 and rotates with the shaft 51 a gear 53, and a third elastic member 54 sleeved on the shaft 51 and located between the gear 53 and the bearing 52, the gear The section of the socket joint between 53 and the shaft 51 is non-circular, so that the gear 53 can move up and down along the shaft 51, and can rotate with the shaft 51. The gear 53 has a plurality of rounds arranged at intervals. Two tooth blocks 531, two adjacent second tooth blocks 531 jointly define a second tooth groove 532, one end of the third elastic member 54 abuts against the gear 53, and the other end abuts against the bearing 52.

The brake unit 3 is disposed in the accommodating space 11, and includes a brake seat 31 defining a perforation 311, a first brake rod 32 inserted in the wheel seat 1 and the perforation 311, and a first brake rod 32 fixed to the brake seat A second brake lever 34 on the shaft hole 12, a first elastic member 33 arranged between the brake seat 31 and the wheel seat 1, and a second elastic member 35 arranged in the hole 311 . One end of the second elastic member 35 abuts against the brake seat 31, and the other end abuts against the first brake rod 32. The brake seat 31 can move in a braking position and an active position relative to the wheel seat 1. In the braking position, the brake seat 31 has a higher horizontal position than in the active position, and the first brake lever 32 is at the same time Moving upward and at least one end is embedded in the corresponding first tooth groove 223, the second brake lever 34 will be embedded in the corresponding second tooth groove 532. The first elastic member 33 accumulates an elastic force when the brake seat 31 is in the braking position, and constantly moves the brake seat 31 to the active position.

The drive unit 4 includes a brake drive plate 41 pivoted on the wheel base 1, and a brake release drive plate 42 located above the brake drive plate 41 and pivoted on the wheel base 1. The brake drive plate 41 It has a first pivot 411 pivotally connected to the wheel base 1, a top support portion 412 on one side of the brake drive plate 41 and can support the brake seat 31, and one on the other side of the brake drive plate 41 It is exposed on the first stepping portion 413 of the wheel base 1, and a first fixing portion 414 facing the brake release drive plate 42. The brake release drive plate 42 has a second pivot pivotally connected to the wheel base 1 421. A second fixing portion 422 that can be interlocked with the first fixing portion 414, and a second stepping portion 423 exposed on the wheel base 1.

Referring to Figures 3 to 6, in use, the caster device is usually installed under a carrier that needs to be transported, the moving unit 2 is used to push the carrier effortlessly, and the steering unit 5 is used to control the direction of travel Change. When the carrier needs to be parked, moving the first stepping portion 413 downwards allows the top support portion 412 to prop up the brake seat 31 to move to the braking position, and make the first fixing portion 414 and the second fixing portion 422 are locked with each other. At this time, the first brake lever 32 will be inserted into the first tooth groove 223 so that the runners 22 cannot rotate, and the second brake lever 34 will be inserted into the second tooth groove 532 so that the gear 53 cannot rotate. Rotation makes the shaft 51 unable to rotate and achieves the braking function (as shown in Figs. 5 and 6). When the carrier needs to be moved again, swinging the second stepping portion 423 downward can separate the first fixing portion 414 from the second fixing portion 422, and the first elastic member 33 will push the brake seat 31 down to The movable position enables the mobile unit 2 and the steering unit 5 to continue to move without restriction.

With reference to FIG. 7, when the brake seat 31 is in the braking position, if the first brake lever 32 abuts against the first tooth block 222, the first brake lever 32 cannot move upward and compresses the second elastic member 35. At this time, the user can slightly push the carrier and rotate the wheels 22 until the first tooth groove 223 is rotated to a position where the first brake lever 32 can be embedded, and the second elastic member 35 will The first brake lever 32 is pushed into the corresponding first tooth groove 223; if the second brake lever 34 is pressed against the corresponding second tooth block 531, the gear 53 will be pushed upward and squeeze the third tooth block. At this time, the user can slightly rotate the carrier, and then rotate the shaft 51 until the second tooth groove 532 is turned to a position where the second brake lever 34 can be embedded, and the third elastic member 54 will The gear 53 is pushed so that the second brake lever 34 is inserted into the corresponding second tooth groove 532.

To sum up, the effect of the caster device of the present invention is to move the brake seat 31 to the braking position by stepping on the brake drive plate 41, and engage and fix the brake seat 31 with the brake release drive plate 42 to achieve the purpose of braking. ; Then by stepping on the brake release drive plate 42 to separate the two that are stuck against each other, the brake seat 31 will return to the active position due to the elastic force of the first elastic member 33 to achieve the purpose of releasing the brake. The two actions of braking and releasing the brake are respectively completed by two driving plates, which will not cause confusion, and they are all driven in a pedaling manner, which conforms to the user's operating habit. Therefore, the objective of the present invention is indeed achieved.

However, the above are only examples of the present invention, and should not be used to limit the scope of implementation of the present invention, any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification still belong to This invention covers the patent.

1: wheel seat 11: accommodation space 12: shaft hole 2: moving unit 21: wheel shaft 22: runner 221: inner surface 222: first tooth block 223: first tooth groove 3: brake unit 31: brake seat 311: Perforation 32: first brake lever 33: first elastic member 34: second brake lever 35: second elastic member 4: drive unit 41: brake drive plate 411: first pivot 412: top support 413: first stepping Part 414: First fixed part 42: Unbrake drive plate 421: Second pivot 422: Second fixed part 423: Second pedaling part 5: Steering unit 51: Shaft 52: Bearing 53: Gear 531: Second tooth Block 532: second tooth groove 54: third elastic member

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: Figure 1 is a perspective view of an embodiment of the caster device of the present invention; Figure 2 is a perspective exploded view of the embodiment Figure 3 is a cross-sectional side view illustrating a brake seat in an active position; Figure 4 is a sectional front view illustrating the brake seat in the active position; Figure 5 is a view similar to Figure 3, illustrating the The brake seat is in a braking position; Figure 6 is a diagram similar to Figure 4, illustrating the brake seat in the braking position; and Figure 7 is a diagram similar to Figure 3, illustrating that when the brake seat is in the braking position, a The first brake lever and the second brake lever are not embedded in the corresponding first and second tooth slots.

1: Wheel seat

11: accommodating space

12: Shaft hole

2: mobile unit

21: Axle

22: Runner

221: inside

222: first tooth block

223: first cogging

41: Brake drive plate

411: First Pivot

412: top support

413: First Step

414: first fixed part

42: Release the brake drive plate

421: Second Pivot

422: second fixed part

423: The second stepping part

3: Braking unit

31: brake seat

311: Piercing

32: The first brake lever

33: The first elastic part

34: second brake lever

35: second elastic part

4: drive unit

5: Steering unit

51: shaft

52: Bearing

53: Gear

531: second tooth block

532: second cogging

54: The third elastic part

Claims (4)

A caster device includes: a wheel base defining an accommodating space; a moving unit, including a wheel shaft passing through the wheel base, and two rotatable wheels mounted on the left and right ends of the wheel shaft. The wheel includes an inner side surface facing the other runner, at least one inner side surface is provided with a plurality of first tooth blocks arranged at intervals around its own axis, and two adjacent first tooth blocks jointly define a first tooth groove; A brake unit is arranged in the accommodating space and includes a brake seat defining a perforation, a first brake rod inserted in the wheel seat and the perforation, and a brake seat between the brake seat and the wheel seat The brake seat can move in a braking position and an active position relative to the wheel seat. In the braking position, the horizontal position of the brake seat is higher than in the active position. The first The brake lever moves upward at the same time and at least one end is embedded in the corresponding first tooth groove, the first elastic member constantly moves the brake seat to the movable position; and a driving unit including a brake pivoted on the wheel seat A drive plate, and a brake release drive plate located above the brake drive plate and pivoted on the wheel seat, the brake drive plate has a first pivot pivotally connected to the wheel seat, and a brake drive plate located in the brake drive plate One side can support the top bracing part of the brake seat, a first stepping part located on the other side of the brake drive plate and exposed on the wheel seat, and a first fixing part facing the brake release drive plate, the The brake release drive plate has a second pivot pivotally connected to the wheel base, a second fixing part that can be interlocked with the first fixing part, and a second stepping part exposed on the wheel base, downward Swinging the first stepping part allows the top brace part to prop up the brake seat upward to move to the braking position, and to make the first fixing part and the second fixing part buckle each other, swinging the second stepping part downward can Separating the first fixing part from the second fixing part, the first elastic member moves the brake seat downward to the movable position. The caster device according to claim 1, wherein the wheel seat further defines a shaft hole with an opening facing upward and extending downward to the accommodating space; the caster further includes a steering unit penetrating through the shaft hole, The steering unit includes a shaft inserted in the shaft hole and rotatable around its own axis, a bearing sleeved on the shaft, and a shaft sleeved on the shaft and located under the bearing and rotating with the shaft The section of the sleeve joint between the gear and the shaft is non-circular, so that the gear can move up and down along the shaft and can rotate with the shaft. The gear has a number of second Tooth block, two adjacent second tooth blocks jointly define a second tooth slot; the brake unit also has a second brake lever fixed on the brake seat and located in the shaft hole, the brake seat is in the braking position At this time, the second brake lever will be embedded in the corresponding second tooth groove. The caster device according to claim 2, wherein the steering unit further includes a third elastic member sleeved on the shaft and located between the gear and the bearing, and one end of the third elastic member abuts against the The other end of the gear is pressed against the bearing. When the brake seat is in the braking position, if the second brake lever is pressed against the corresponding second tooth block, the gear will be pushed upward and squeeze the third The elastic member rotates the shaft until the second tooth groove is rotated to the position where the second brake lever can be embedded, and the third elastic member pushes the gear so that the second brake lever is inserted into the corresponding second tooth groove . The caster device according to any one of claims 1 to 3, wherein the braking unit further includes a second elastic member disposed in the perforation, one end of the second elastic member abuts against the braking seat, and One end abuts against the first brake lever. When the brake seat is in the braking position, if the first brake lever abuts against the first tooth block, the first brake lever cannot move upward and compresses the second elastic Rotating the wheels until the first tooth slot is turned to a position where the first brake lever can be embedded, and the second elastic member pushes the first brake lever into the corresponding first tooth slot.

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