TWI679135B - Caster device - Google Patents

Abstract

A caster device includes: a wheel base, a moving unit, a braking unit, and a driving unit; the moving unit is passed through the wheel base and includes two rotatable wheels, each wheel has a plurality of intervals A first cogging arranged in a circle; the braking unit includes a brake seat and a first brake lever, the brake seat can be moved relative to the wheel seat in a braking position and a movable position, and compared with the braking position In the active position, the first brake lever moves upward and is embedded in the corresponding first cogging; the drive unit includes a brake drive plate and a brake release plate, and swinging the brake drive plate downwards enables the brake The seat is moved to the brake position, and the brake release driving plate is swung down to move the brake seat to the active position.

Description

Caster device

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

Generally, for the convenience of moving, several casters are usually installed under the carrier for carrying articles. In order to prevent the carrier 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 necessary, depresses the brake pedal with a foot to restrict the rotation of the caster, and when the carrier needs to be moved again, it is usually designed to turn the brake pedal in the opposite direction. To lift the restriction, using your foot to flip the brake pedal in the opposite direction is not only inconsistent with the user ’s operating habits, but often because you do n’t know whether the brake pedal is used to brake or release the brake, you spend more time trying to use it. Not intuitively, there is still room for improvement.

An object of the present invention is to provide a caster device capable of overcoming at least one disadvantage 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 left and right spaced first shaft holes that pass through each other, and an accommodation space above the first shaft holes; the moving unit includes a wheel shaft passing through the first shaft holes, and two Each wheel is mounted on the left and right ends of the wheel shaft and can rotate. Each wheel includes an inner side facing the other wheel, and at least one inner side is provided with a plurality of first tooth blocks spaced around its own axis. Two adjacent first tooth blocks together define a first cogging; the braking unit is disposed in the accommodating space, and includes a brake seat defining a perforation, and a brake socket inserted between the wheel seat and the perforation. A first brake lever, and a first elastic member disposed between the brake seat and the wheel seat, the brake seat can be moved relative to the wheel seat in a braking position and a movable position, and compared with the braking position Since the horizontal position of the brake seat is higher in the movable position, the first brake lever moves upwards simultaneously 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 movable position. .

The drive unit includes a brake drive plate pivotally mounted on the wheel seat, and a brake release drive plate which is located above the brake drive plate and pivotally mounted on the wheel seat. The brake drive plate has a pivot connection with the wheel seat. A first pivot connected, a top support portion located on one side of the brake drive plate and capable of supporting the brake seat, a first step portion located on the other side of the brake drive plate and exposed from the wheel seat, and A first fixing portion facing the brake release driving plate, the brake release driving plate having a second pivot pivotally connected to the wheel seat, a second fixing portion which can be engaged with the first fixing portion, and One A second stepping portion exposed on the wheel seat, moving the first stepping portion downwards can cause the top support portion to support the brake seat upward to the braking position, and the first fixing portion and the second fixing portion can be fixed The first and second elastic parts will move the brake seat downward to the active position by swinging the second stepping part downward to separate the first fixing part from the second fixing part.

The effect of the present invention is that through the connection relationship between the brake drive plate and the brake seat, the user only needs to step down on the brake drive plate to achieve the purpose of stopping the rotation of the wheels. The user can then Depressing the brake release driving plate to release the stop function is simple and intuitive.

1‧‧‧ wheel seat

11‧‧‧ accommodation space

12‧‧‧ Shaft hole

2‧‧‧ mobile unit

21‧‧‧ Wheel

22‧‧‧ runner

221‧‧‧ inside

222‧‧‧The first tooth block

223‧‧‧first cogging

3‧‧‧brake unit

31‧‧‧brake seat

311‧‧‧perforation

41‧‧‧brake drive plate

411‧‧‧first pivot

412‧‧‧Top support

413‧‧‧First stepping unit

414‧‧‧First fixed part

42‧‧‧Release brake drive plate

421‧‧‧ second pivot

422‧‧‧Second Fixing Section

423‧‧‧Second pedaling unit

5‧‧‧ steering unit

51‧‧‧ shaft

52‧‧‧bearing

32‧‧‧First brake lever

33‧‧‧The first elastic piece

34‧‧‧Second brake lever

35‧‧‧Second elastic member

4‧‧‧Drive unit

53‧‧‧Gear

531‧‧‧Second tooth block

532‧‧‧Second Cogging

54‧‧‧ the third elastic member

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

Referring to FIGS. 1 and 2, an embodiment of a 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 whose opening faces upward and extends downward to the accommodating space 11.

The moving unit 2 includes an axle 21 passing through the wheel base 1 and two runners 22 installed on the left and right ends of the axle 21 and capable of rotating. Each of the runners 22 includes one facing the other runner 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 together define a first tooth groove 223.

The steering unit 5 passes through the shaft hole 12 and includes a shaft 51 inserted into the shaft hole 12 and rotatable about its own axis, a bearing 52 sleeved on the shaft 51, and a sleeve 52 The shaft 51 is located below the bearing 52 and rotates with the shaft 51, and a third elastic member 54 is sleeved on the shaft 51 and located between the gear 53 and the bearing 52. The gear The cross section of the socket 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 Two tooth block 531, two adjacent second teeth The blocks 531 collectively 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 braking unit 3 is disposed in the accommodating space 11, and includes a brake seat 31 defining a perforation 311, a first brake lever 32 inserted in the wheel seat 1 and the perforation 311, and a fixed to the brake seat. A second brake lever 34 on the shaft hole 12 and a first elastic member 33 disposed between the brake seat 31 and the wheel seat 1, and a second elastic member 35 disposed in the through 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 lever 32. The brake seat 31 can be moved relative to the wheel seat 1 in a braking position and a movable position. In the braking position, the brake seat 31 is higher in the horizontal position than in the movable position. The first brake lever 32 is simultaneously Move upward and at least one end is embedded in the corresponding first tooth groove 223, and the second brake lever 34 is 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 movable position.

The driving unit 4 includes a brake driving plate 41 pivotally mounted on the wheel base 1, and a brake-releasing driving plate 42 positioned above the brake drive plate 41 and pivotally mounted on the wheel base 1. The brake driving plate 41 There is a first pivot 411 pivotally connected to the wheel base 1, a top support portion 412 located on one side of the first pivot 411 and capable of supporting the brake seat 31, and a second pivot 411 located on the first pivot 411. A first stepping portion 413 exposed on one side and exposed outside the wheel base 1, and a first stepping portion 413 located between the top support portion 412 and the first stepping portion 413 and facing To the first fixing portion 414 of the brake release driving plate 42, the brake release driving plate 42 has a second pivot shaft 421 pivotally connected to the wheel base 1, and a first fixing portion 414 which can be engaged with the first fixing portion 414. Two fixing portions 422 and a second stepping portion 423 exposed outside the wheel base 1.

Referring to FIGS. 3 and 5, when the brake seat 31 is in the movable position (as shown in FIG. 3), the first stepping portion 413 can be stepped on and moved downward relative to the wheel seat 1, and the top supporting portion 412 is driven upward. Swing and push the brake seat 31 to move to the braking position, and drive the first fixing portion 414 to drive the second fixing portion 422 in a clockwise direction to swivel together to lock and position each other, and the second fixing portion 422 drives the second stepping portion 423 to swing upward.

When the brake seat 31 is in the braking position (as shown in FIG. 5), the second stepping portion 423 can be stepped down to move downward relative to the wheel seat 1 and drive the second fixing portion 422 to drive the first fixing portion. 414 swings in the opposite direction and disengages from each other. The first elastic member 33 moves the braking seat 31 downward to the active position.

Referring to FIG. 3 to FIG. 6, in use, the caster device is usually installed below a carrier to be carried, the mobile unit 2 is used to push the carrier labor-savingly, and the steering unit 5 is used to control the direction of travel Change. When the platform needs to be parked, moving the first stepping portion 413 downward can cause the top support portion 412 to support the brake seat 31 upward to the braking position, and the first fixing portion 414 and the second fixing portion can be moved. 422 is locked with each other. At this time, the first brake lever 32 will be inserted into the first tooth groove 223 so that the When the runner 22 cannot rotate, the second brake lever 34 will be embedded in the second tooth groove 532 to prevent the gear 53 from rotating, and then the shaft 51 cannot be rotated to achieve the function of stopping the brake (as shown in Figs. 5 and 6).示). When the stage 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 active position allows 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 compress the second elastic member. 35. At this time, the user can push the carrier slightly and rotate the wheels 22 until the first tooth groove 223 is turned to a position that can be embedded by the first brake lever 32. 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 against the corresponding second tooth block 531, the gear 53 is pushed upward and squeezes the third The elastic member 54. At this time, the user can rotate the carrier slightly, 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 inserted. The third elastic member 54 will The gear 53 is pushed to engage the second brake lever 34 into the corresponding second slot 532.

In summary, the effect of the caster device of the present invention is that the brake seat 31 is moved to the brake position by stepping on the brake drive plate 41, and is locked against and fixed with the brake release drive plate 42 to achieve the purpose of braking. ; And then by stepping on the brake release driving plate 42 to separate the two which are stuck with each other, the brake seat 31 will be caused by the first elastic member The elastic force of 33 returns to this active position, and the purpose of releasing the brake is achieved. The two actions of braking and releasing the brake are completed by two driving boards, respectively, without causing confusion, and both are driven in a pedaling manner, which conforms to the user's operating habits. Therefore, the object of the present invention is indeed achieved.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

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 turning wheels installed at the left and right ends of the wheel shaft, each turning The wheel includes an inner side facing the other runner, at least one inner side is provided with a plurality of first tooth blocks spaced around its own axis, and two adjacent first tooth blocks collectively define a first tooth groove; A braking unit is disposed in the accommodating space, and includes a brake seat defining a perforation, a first brake lever inserted between the wheel seat and the perforation, and a brake seat disposed between the brake seat and the wheel seat. The first elastic member between the brake seat is movable relative to the wheel seat in a braking position and a movable position. In the braking position, the brake seat is in a higher horizontal position than in the movable position. 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 drive unit including a brake pivoted on the wheel seat Driver board, A brake-releasing drive plate located above the brake drive plate and pivoted on the wheel seat, the brake drive plate has a first pivot shaft pivotally connected to the wheel seat, and one located on one side of the first pivot shaft, and A top support portion capable of supporting the brake seat, a first stepping portion located on the other side of the first pivot shaft and exposed outside the wheel seat, and a first stepping portion located between the top support portion and the first stepping portion and facing The first fixing portion of the brake release driving plate, the brake release driving plate has a second pivot shaft pivotally connected to the wheel seat, a second fixing portion that can be engaged with the first fixing portion, and an exposed portion. At the second stepping portion outside the wheel seat, when the brake seat is in the active position, the first stepping portion can be stepped down to move downward relative to the wheel seat, and the top support portion is driven to swing upward and push the The brake seat is moved to the braking position, and the first fixing part is driven to drive the second fixing part to swing together to be snap-locked to each other, and the second fixing part is driven to move the second stepping part to swing upward, the When the brake seat is in the braking position, the second stepping portion can be While riding a swing down relative to the wheel base, and the second drive section drives the first fixing portion fixing a reverse swing from each other in turn, the first resilient member moves the brake shoes down to the active position. The caster device according to claim 1, wherein the wheel base further defines a shaft hole whose opening faces upward and extends down to the accommodation space; the caster further includes a steering unit passing through the shaft hole, The steering unit includes a shaft inserted into a shaft hole and rotatable around its own axis, a bearing sleeved on the shaft, and a shaft sleeved under the bearing and rotating with the shaft The gear has a non-circular cross-section at the socket with the shaft, 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 together define a second tooth groove; the braking 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 cogging. 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 third elastic member The other end of the gear abuts against the bearing, and when the brake seat is in the braking position, if the second brake lever is abutted against the corresponding second tooth block, the gear will be pushed upward and squeeze the third An elastic member, rotating the shaft until the second cogging slot is rotated to a position that can be embedded by the second braking lever, and the third elastic member will push the gear to cause the second braking lever to fit into the corresponding second cogging slot . 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 brake seat, and the other When one end abuts against the first brake lever, and when the brake seat is in the braking position, if the first brake lever is against the first tooth block, the first brake lever cannot move upward and compresses the second elasticity. The second elastic member will push the first brake lever into the corresponding first tooth groove.