TWM612111U - Electric caster and cart including the electric caster - Google Patents

Abstract

This creation is about an electric caster and a cart including the electric caster. The electric caster includes: a caster seat; at least one pivot piece, each of the pivot pieces includes an abutting surface, and is pivotally connected to the caster seat through a pivot; an electric wheel arranged on the at least one pivot piece; and an elastic The mechanism, connected to the caster seat, includes at least one resilient portion resilient to the thrust surface; wherein the relative resilient position of the resilient portion and each of the thrust surfaces changes with the rotation of the at least one pivot piece change. The cart further includes: a cart body with a plurality of rollers and the at least one electric caster on the bottom side; a control system arranged on the cart body and connected with the electric caster, the control system can control the action of the electric caster.

Description

Electric casters and carts including the electric casters

This creation is about an electric caster and a cart including the electric caster.

Because the movable load-bearing device has the advantages of convenient and fast moving, time-saving and labor-saving, it is widely used in various fields.

In daily life, there are many requirements for moving many objects with movable carrying devices. When moving or carrying objects, they are often placed on a carrying device equipped with rollers, such as those used in hospitals to place medical supplies and Medical carts for equipment, tool carts for placing tools in maintenance places, carts for transporting goods on and off shelves in merchandise sales places, etc.

However, the conventional movable load-bearing device does not provide a power device, it still needs to be moved manually, and there is still a relatively laborious problem. In addition, the rollers of the conventional movable load-bearing device are not retractable and run in a height difference. On the surface, it will cause unstable and difficult to push defects.

Therefore, it is necessary to provide a novel and progressive electric caster and a cart including the electric caster to solve the above-mentioned problems.

The main purpose of this creation is to provide an electric caster and a cart including the electric caster, whereby the electric caster can expand and contract according to different forces or contact states.

In order to achieve the above objective, this creation provides an electric caster, including: a caster seat; at least one pivot piece, each pivot piece includes an abutting surface, pivotally connected to the caster seat through a pivot; an electric wheel, arranged in The at least one pivot piece; and an elastic mechanism, connected to the caster seat, including at least one resilient portion resilient to the thrust surface; wherein the relative resilient position of the resilient portion and each of the thrust surfaces follows It changes with the rotation of the at least one pivot piece.

In order to achieve the above-mentioned object, this invention provides another cart including at least one electric caster as described above. The stroller further includes: a car body with a plurality of rollers and the at least one electric caster on the bottom side; a control system, which is arranged on the car body and connected to the at least one electric caster, and the control system can control the at least one electric caster The action of casters.

The following examples are only used to illustrate the possible implementation of this creation, but they are not intended to limit the scope of protection of this creation.

Please refer to FIGS. 1 to 4, which show a preferred embodiment of the present invention. The electric caster 1 of the present invention includes a caster seat 10, at least one pivot piece 20, an electric wheel 30 and an elastic mechanism 40. Wherein, the electric wheel 30 may include a motor and a transmission mechanism (not shown) to make the electric wheel 30 rotate.

Each pivot piece 20 includes an abutting surface 21, and the at least one pivot piece 20 is pivotally connected to the caster base 10 through a pivot 201. The electric wheel 30 is arranged on the at least one pivot piece 20. The elastic mechanism 40 is connected to the caster base 10 and includes at least one elastic portion 41 that elastically abuts against the pushing surface 21. Wherein, the relative elastic position of the elastic portion 41 and each of the pushing surfaces 21 changes with the rotation of the at least one pivot piece 20, so that the force application point of the elastic mechanism 40 can be changed to approach The elastic force is constant, and the electric caster 1 can expand and contract according to different forces or contact states (as shown in Figures 5 to 7).

The caster base 10 includes at least one first track 11, the first track 11 may be a channel or a convex track, and the at least one pivot piece 20 can swing along the at least one first track 11. The at least one pivot piece 20 is provided with at least one guide pin 22 that can move along the at least one first track 11, each of the guide pins 22 may be, for example, a screw that is locked to the pivot piece 20 and has an enlarged head 221 Each of the enlarged heads 221 is preferably cylindrical and slidably disposed in a first track 11. Preferably, the at least one pivot piece includes two pivot pieces 20 spaced apart from each other, and a sleeve 202 is sleeved on the pivot 201 and located between the two pivot pieces 20 to enhance structural strength and stability. The electric wheel 30 is arranged between the two pivot pieces 20. Each pivot piece 20 includes a slot 23, and the electric wheel 30 includes a spindle 31 that is non-rotatably clamped in the slot 23 and a wheel body 32 that rotates around the spindle 31. The electric caster 1 further includes at least one anti-rotation member 50 sleeved on the spindle 31 without relative rotation and axially abutting the at least one pivot piece 20, and each of the anti-rotation members 50 includes an extension card inserted into the The lug 51 in the slot 23 prevents the spindle 31 from rotating and can reduce the force of each pivot piece 20.

In detail, the caster base 10 further includes two spaced-apart sidewalls 12, and the two sidewalls 12 are provided with an inner convex surface 121 opposite to each other and respectively include an escape recess 122. Each of the side walls 12 is provided with a first track 11, so that the two pivot pieces 20 can swing more stably; each of the pivot pieces 20 abuts against an inner convex surface 121 and partially forms a gap 60 with a side wall 12 , Reduce friction so that the two pivot pieces 20 can swing smoothly; the pushing surface 21 of each pivot piece 20 extends to overlap with a first rail 11 and also includes a missing corner 24 for accommodating the resilient portion 41 to ensure The resilient portion 41 is indeed effectively resilient to within the preferred range of the pushing surface 21, and prevents the resilient portion 41 from being separated from the two pivot pieces 20; each pivot piece 20 is provided with a first track 11 Move one of the guide pins 22 to make the swing of the two pivot pieces 20 more stable; the spindle 31 includes at least one (preferably two) axially extending tangent planes 311, and each of the anti-rotation members 50 has a The sleeve hole 52 matched with the shape of the mandrel 31 is easy to assemble and has a good anti-rotation effect; the two ends of the mandrel 31 are respectively provided with a fastener 70 such as a nut, and each pivot piece 20 is arranged on an anti-rotation Between the member 50 and a fastener 70; each of the fasteners 70 can move in and out of the evasion recess 122 with a pivot piece 20 (FIGS. 5 to 7), and the evasion recess 122 provides the pivot piece 20 And the electric wheel 30 has a larger swing range.

Preferably, the caster base 10 further includes at least one second rail 13, the resilient portion 41 can move along the at least one second rail 13, and the first rail 11 can be a channel or a convex rail. The elastic mechanism 40 further includes an elastic member 42 abutting on the caster base 10 and the elastic portion 41. The elastic member 42 is, for example, but not limited to, a torsion spring, and can also be a leaf spring or other types. In this embodiment, the two side walls 12 of the caster base 10 are each provided with a second rail 13, and the resilient portion 41 is a pin that penetrates each of the second rails 13, preferably the pin is Round rod shape, with small friction resistance. The elastic member 42 is pivoted on a pivot 80 passing through the two side walls 12 of the caster base 10, and the elastic member 42 abuts against a top plate of the caster base 10 and the pin, and the pin abuts Top the two pivot pieces 20. In other embodiments, a part of the elastic member can also be used as the elastic portion to directly elastically abut against the two pivot pieces. The position where the elastic portion 41 springs against each of the pressing surfaces 21 changes along each of the pressing surfaces 21 with the rotation of the two pivot pieces 20, thereby changing the pressing surface 21 relative to the elastic member 42 The applied force point can achieve the effect of near constant elasticity.

Please refer to FIGS. 8 to 11 together. The present invention provides another cart 100. The cart 100 includes at least one electric caster 1 as described above. The cart 100 further includes a body 130 and a control system 140. The bottom side of the vehicle body 130 is provided with a plurality of rollers 150 and the at least one electric caster 1. In this embodiment, the at least one electric caster 1 is a directional wheel, and the plurality of rollers 150 are universal wheels to facilitate changing the direction of travel. The control system 140 is installed in the vehicle body 130 and connected (electrically connected, wirelessly connected) to the at least one electric caster 1, and the control system 140 can control the action of the at least one electric caster 1.

Specifically, the control system 140 includes a throttle 141 (which can be a handle type, a toggle type, or other types) that can control the rotation speed of the at least one electric caster 1, and can change the traveling speed of the cart 100. The control system 140 can further include a battery module 142 electrically connected to the at least one electric caster 1 (which can be wired or wirelessly charged, and can be installed inside or outside the electric caster 1) to provide the at least one electric caster 1 Electricity required for operation. The control system 140 further includes at least one of a motion mode switching module 143, a forward and reverse switching module 144, an electric energy status display module 145, and a brake control module 146 (preferably including all of the above, and preferably Attached to a grip mechanism 147 of the cart 100), the motion mode switching module 143 can control the power of the at least one electric caster 1, and the forward and reverse switching module 144 can control the rotation of the at least one electric caster 1 Direction, the power state display module 145 can display the power state of the battery module 142, and the brake control module 146 can brake the at least one electric caster 1. In this way, the operation of the cart 100 is extremely easy, fast, simple and safe.

In an operating environment as shown in Figure 8, Figure 9 and Figure 10, for example, the cart 100 travels on a surface 200 with a height difference, when the electric caster 1 is at a higher position relative to the surface 200 (with reference to the figure 5 and 9), the load on the electric caster 1 becomes greater, and the wheel body 32 swings away from the surface 200 to drive the two pivot pieces 20 to push against the pin to compress the elastic member 42, when At a lower position of the electric caster 1 relative to the surface 200 (with reference to FIGS. 7 and 10), the load on the electric caster 1 becomes smaller, and at this time the elastic member 42 springs against the pin to drive The two pivot pieces 20 drive the wheel body 32 to swing toward the surface 200. In this way, the effective contact between the wheel body 32 and the surface 200 can be maintained with a constant elastic force, which can ensure that the wheel body 32 does not spin freely and can make the cart 100 move stably.

1: Electric casters 10: Caster seat 11: The first track 12: side wall 13: second track 121: Inner convex surface 122: Dodge Notch 20: pivot 201: Pivot 202: Bushing 21: Push to face 22: guide pin 221: swollen head 23: Slotting 24: missing corner 30: electric wheel 31: Mandrel 311: Cut Plane 32: Wheel center 40: flexible mechanism 41: Rejection Department 42: Elastic part 50: Anti-rotation parts 51: lug 52: set hole 60: Clearance 70: Fastener 80: pivot 100: cart 130: car body 140: control system 141: Throttle 142: Battery Module 143: Sports mode switching module 144: Forward and reverse switching module 145: Power status display module 146: Brake control module 147: Grip mechanism 150: Roller 200: surface

Figure 1 is a perspective view of a preferred embodiment of the creation. Figure 2 is an exploded view of a preferred embodiment of the creation. Figure 3 is a side view of a preferred embodiment of the creation. Fig. 4 is a partial enlarged view of Fig. 3. Figures 5 to 7 are schematic diagrams of the actions of creating a preferred embodiment. Figures 8 to 10 are schematic diagrams of different states of creating a preferred embodiment of the cart on a surface. Figure 11 is a schematic diagram of the control system of the cart for creating a preferred embodiment.

1: Electric casters

12: side wall

20: pivot

221: swollen head

30: electric wheel

Claims (10)

An electric caster including: A caster seat At least one pivot piece, each of the pivot pieces includes an abutting surface, and is pivotally connected to the caster seat through a pivot; An electric wheel arranged on the at least one pivot piece; and An elastic mechanism, connected to the caster base, including at least one elastic portion that elastically abuts on the pushing surface; Wherein, the relative elastic position of the elastic portion and each of the pushing surfaces changes with the rotation of the at least one pivot piece. The electric caster according to claim 1, wherein the at least one pivot piece includes two pivot pieces spaced apart, and the electric wheel is arranged between the two pivot pieces. The electric caster according to claim 1, wherein each pivot piece includes a slot, and the electric wheel includes a spindle that is non-rotatably clamped in the slot and a wheel body that rotates around the spindle. The electric caster according to claim 3, further comprising at least one anti-rotation member sleeved on the mandrel without relative rotation and axially abutting the at least one pivot piece, each of the anti-rotation members includes an extension snap-in One lug in the slot. The electric caster according to claim 1, wherein the caster seat includes at least one first track, and the at least one pivot piece is provided with at least one guide pin movable along the at least one first track. The electric caster according to claim 4, wherein the caster seat further includes two spaced-apart side walls, the two side walls are provided with an inner convex surface opposite to each other and respectively include an escape recess, and each side wall is provided with a first track, Each of the pivot pieces can swing along the first track; the at least one pivot piece includes two spaced apart pivot pieces, each of the pivot pieces abuts against an inner convex surface and partially forms a gap with a side wall; a shaft The sleeve is sleeved on the pivot and located between the two pivot pieces; the pushing surface of each pivot piece extends to overlap with a first track and further includes a missing corner for accommodating the resilient portion; each pivot piece A guide pin that can move along the first track is provided; the mandrel includes at least one tangent plane extending in the axial direction, each of the anti-rotation parts has a sleeve hole that matches the shape of the mandrel; the two ends of the mandrel A fastener is respectively provided, and each pivot piece is arranged between an anti-rotation member and a fastener; and each of the fasteners can move in and out of the evasion recess along with the movement of the pivot piece. The electric caster according to any one of claims 1 to 6, wherein the caster seat further includes at least one second track, the resilient portion can move along the at least one second track, and the elastic mechanism further includes a The caster seat and the elastic member of the elastic member, the position of the elastic member against each of the pressing surfaces changes along each of the pressing surfaces with the rotation of the at least one pivot piece. A cart, comprising at least one electric caster as described in claim 1, and further comprising: A vehicle body with a plurality of rollers and the at least one electric caster on the bottom side; and A control system is arranged on the vehicle body and connected to the at least one electric caster, and the control system can control the action of the at least one electric caster. The cart according to claim 8, wherein the control system includes a throttle capable of controlling the rotation speed of the at least one electric caster. The cart according to claim 9, wherein the control system further includes a battery module electrically connected to the at least one electric caster, and the control system further includes a motion mode switching module, a forward and reverse switching module, and a At least one of an electric energy status display module and a brake control module, the motion mode switching module can control the power of the at least one electric caster, the forward and reverse switching module can control the rotation direction of the at least one electric caster, the The power status display module can display the power status of the battery module, and the brake control module can brake the at least one electric caster.

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