A retractable bracket wheel

Abstract

The present invention provides a retractable support wheel, comprising a support column, a movable frame fixedly arranged at the bottom of the support column, a support frame rotatably mounted on the movable frame via a first rotating shaft, and a roller rotatably mounted on the support frame, a first clamping column and a second clamping column are fixedly arranged on the support frame, a first clamping groove for supporting the second clamping column from the rear side is arranged at the bottom of the rear side of the support frame, a foot pedal is arranged inside the movable frame, the foot pedal is rotatably mounted in the movable frame via a second rotating shaft, a second clamping groove for supporting the first clamping column from the front side is arranged at the upper part of the front end of the foot pedal, a torsion spring is arranged on the second rotating shaft, and the foot pedal is in a forward rotation limit position under the action of the torsion spring. The present invention has a use state and a storage state, the structures in both states are stable and reliable, and the conversion of the two states is convenient to operate, can meet the positioning requirements of two working conditions, and can reduce the occupied space by storage.

Description

Technical Field

[0001] The invention discloses a stowable support wheel, belonging to the technical field of support wheel structures. Background Art

[0002] As more and more equipment needs to be moved, caster wheels are increasingly used around the world, and casters are almost indispensable in all walks of life. In modern times, with the continuous development of science and technology, equipment has become more and more functional and highly utilized, and caster wheels have become an indispensable component. Caster wheels are widely used in trolleys, mobile scaffolding, workshop trucks, etc. The existing caster wheels used for carrying cargo transportation are generally single wheels. And they generally do not have a storage function, occupy space during transportation, and are easily damaged. Summary of the invention

[0003] In view of the shortcomings of the prior art, an object of the present invention is to provide a stowable support wheel, so as to at least solve the technical problem that the support wheel cannot be stowed as mentioned in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical scheme: a retractable bracket wheel, comprising a support column, a movable frame fixedly arranged at the bottom of the support column, a support frame rotatably mounted on the movable frame by a first rotating shaft, and a roller rotatably mounted on the support frame, wherein a first clamping column located at the front side and a second clamping column located at the rear side are fixedly arranged on the support frame, a first clamping groove for supporting the second clamping column from the rear side to prevent the second clamping column from moving backwards is arranged at the bottom of the rear side of the support frame, a foot pedal is arranged inside the movable frame, the foot pedal is rotatably mounted in the movable frame by the second rotating shaft, a foot pedal portion for stepping is arranged at the rear end of the foot pedal, a second clamping groove for supporting the first clamping column from the front side to prevent the first clamping column from moving forwards is arranged at the upper part of the front end of the foot pedal, a clearance hole for the first rotating shaft to pass through is arranged on the part of the foot pedal located at the rear side of the second clamping groove, and the first rotating shaft is located in the clearance hole,

[0005] The rear side of the foot pedal is connected to the movable frame through a connecting rod assembly, wherein the connecting rod assembly includes a first connecting rod and a second connecting rod, one end of the second connecting rod is hinged to the movable frame, the other end of the second connecting rod is hinged to one end of the first connecting rod through a hinge shaft, and the other end of the first connecting rod is hinged to the foot pedal.

[0006] The second rotating shaft is provided with a torsion spring, one end of which presses against the pedal, and the other end of which presses against the first rotating shaft. Under the action of the torsion spring, the pedal is in the extreme position of forward rotation.

[0007] Under normal use, the support frame rotates backward around the first rotation axis until the second clamping post is clamped in the first clamping slot; when the support frame needs to be stored, the support frame is pulled to rotate forward around the first rotation axis until the first clamping post is clamped in the second clamping slot. During this process, the support frame can be guided to rotate forward around the first rotation axis by stepping on the foot pedal until the first clamping post is in place, and then the foot pedal is released to allow the first clamping post to be clamped in the second clamping slot; when it is needed again, the foot pedal is stepped on, and during the process of the foot pedal rotating around the second rotation axis, the first clamping post is squeezed out of the second clamping slot, and under the action of gravity, the support frame rotates backward around the first rotation axis until the second clamping post is clamped in the first clamping slot.

[0008] Preferably, a gripping portion is provided on the front side of the support frame for easy gripping by the user.

[0009] Preferably, the support column comprises an outer tube, an inner tube and a driving screw, the inner tube can be slidably arranged in the outer tube along the axial direction, the bottom end of the inner tube extends out of the outer tube and is fixedly connected to the movable frame, a nut is arranged inside the inner tube, the upper part of the driving screw is rotatably connected to the top end of the outer tube, the lower part of the driving screw extends into the inner tube and is threadedly connected to the nut, and the top end of the driving screw is fixedly connected to a hand handle. By operating the hand handle to drive the driving screw to rotate forward or reversely, the height of the support column can be adjusted.

[0010] Preferably, the top end of the driving screw is fixedly connected to a receiving groove, and the hand handle is hinged to one end of the receiving groove via a hinge shaft, so that the hand handle can be stored in the receiving groove when not in use.

[0011] Preferably, the support frame includes a left support plate and a right support plate, and the left support plate and the right support plate are respectively arranged on the left and right sides of the movable frame, and the first clamping column and the second clamping column are both arranged between the left support plate and the right support plate and are both fixedly connected to the left support plate and the right support plate.

[0012] Preferably, the movable frame is composed of a left side plate, a top plate and a right side plate connected in sequence, and the movable frame has a receiving cavity with openings on the front side, the rear side and the bottom side, and the foot pedal is arranged in the receiving cavity.

[0013] Beneficial effects of the present invention:

[0014] The present invention has a use state and a storage state. The structures in the two states are stable and reliable, and the conversion between the two states is easy to operate, which can meet the positioning requirements of two working conditions, and the occupied space can be reduced by storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0016] Figure 1A schematic diagram of a stowable support wheel of the present invention;

[0017] Figure 2 It is a schematic diagram of the connection structure of a movable frame capable of accommodating support wheels according to the present invention;

[0018] Figure 3 This is a schematic diagram of the connection structure of a foot pedal capable of accommodating a bracket wheel according to the present invention;

[0019] Figure 4 It is a structural schematic diagram of a support column capable of accommodating a support wheel of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of two states of a stowable support wheel according to the present invention. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0022] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used herein indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention, and such expressions are only for illustrative purposes and do not represent the only implementation method.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] See also Figure 1-Figure 3The present invention provides a technical solution: a retractable support wheel, comprising a support column 6, a movable frame 1 fixedly arranged at the bottom of the support column 6, a support frame 3 rotatably mounted on the movable frame 1 through a first rotating shaft 21, and a roller 5 rotatably mounted on the support frame 3, a first clamping column 31 located at the front side and a second clamping column 32 located at the rear side are fixedly arranged on the support frame 3, a first clamping groove 11 for supporting the second clamping column 32 from the rear side to prevent the second clamping column 32 from moving backward is arranged at the bottom of the rear side of the support frame 3, a foot pedal 4 is arranged inside the movable frame 1, the foot pedal 4 is rotatably mounted in the movable frame 1 through the second rotating shaft 22, a foot pedal portion 41 for stepping is arranged at the rear end of the foot pedal 4, a second clamping groove 42 for supporting the first clamping column 31 from the front side to prevent the first clamping column 31 from moving forward is arranged at the upper part of the front end of the foot pedal 4, a clearance hole for the first rotating shaft 21 to pass through is arranged on the part of the foot pedal 4 located at the rear side of the second clamping groove, and the first rotating shaft 21 is located in the clearance hole,

[0025] The rear side of the footrest 4 is connected to the movable frame 1 through a connecting rod assembly, and the connecting rod assembly includes a first connecting rod 43 and a second connecting rod 44. One end of the second connecting rod 44 is hinged to the movable frame 1, and the other end of the second connecting rod 44 is hinged to one end of the first connecting rod 43 through a hinge shaft. The other end of the first connecting rod 43 is hinged to the footrest 4.

[0026] A torsion spring 45 is disposed on the second rotating shaft 22 , one end of the torsion spring 45 presses against the pedal 4 , and the other end of the torsion spring 45 presses against the first rotating shaft 21 . Under the action of the torsion spring 45 , the pedal 4 is in the extreme position of forward rotation.

[0027] like Figure 5 As shown, in normal use state, the support frame 3 rotates backward around the first rotating shaft 21 until the second clamping column 32 is clamped in the first clamping groove 11; when the support frame 3 needs to be stored, the support frame 3 is pulled to rotate forward around the first rotating shaft 21 until the first clamping column 31 is clamped in the second clamping groove. During this process, the foot pedal 41 can be stepped on to guide the support frame 3 to rotate forward around the first rotating shaft 21 until the first clamping column 31 is in place, and then the foot pedal 41 is released to make the first clamping column 31 clamped in the second clamping groove; when it is needed to be used again, the foot pedal 41 is stepped on, and the first clamping column 31 is squeezed out of the second clamping groove during the rotation of the foot pedal 4 around the second rotating shaft 22, and under the action of gravity, the support frame 3 rotates backward around the first rotating shaft 21 until the second clamping column 32 is clamped in the first clamping groove 11.

[0028] Preferably, a gripping portion 33 is provided on the front side of the support frame 3 for easy gripping by the user.

[0029] Preferably, Figure 4As shown, the support column 6 comprises an outer tube 61, an inner tube 62 and a driving screw 63, the inner tube 62 can be slidably arranged in the outer tube 61 along the axial direction, the bottom end of the inner tube 62 extends out of the outer tube 61 and is fixedly connected to the movable frame 1, a nut 64 is arranged inside the inner tube 62, the upper part of the driving screw 63 is rotatably connected to the top end of the outer tube 61, the lower part of the driving screw 63 extends into the inner tube 62 and is threadedly connected to the nut 64, and the top end of the driving screw 63 is fixedly connected with a hand handle 65. By operating the hand handle 65 to drive the driving screw 63 to rotate forward or reversely, the height of the support column 6 can be adjusted.

[0030] Preferably, the top end of the driving screw rod 63 is fixedly connected with a receiving groove 66, and the hand handle 65 is hinged to one end of the receiving groove 66 through a hinge shaft. Thus, the hand handle 65 can be stored in the receiving groove 66 when not in use.

[0031] Preferably, the support frame 3 includes a left support plate and a right support plate, and the left support plate and the right support plate are respectively arranged on the left and right sides of the movable frame 1, and the first clamping column 31 and the second clamping column 32 are both arranged between the left support plate and the right support plate and are both fixedly connected to the left support plate and the right support plate.

[0032] Preferably, the movable frame 1 is composed of a left side plate, a top plate and a right side plate connected in sequence, and the movable frame 1 has a receiving cavity with openings on the front side, the rear side and the bottom side, and the foot pedal 4 is arranged in the receiving cavity.

[0033] The present invention has a use state and a storage state. The structures in the two states are stable and reliable, and the conversion between the two states is easy to operate, which can meet the positioning requirements of two working conditions, and the occupied space can be reduced by storage.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A retractable support wheel, characterized in that: The invention comprises a support column, a movable frame fixedly arranged at the bottom of the support column, a support frame rotatably mounted on the movable frame through a first rotating shaft, and a roller rotatably mounted on the support frame, a first clamping column located at the front side and a second clamping column located at the rear side are fixedly arranged on the support frame, a first clamping groove is arranged at the bottom of the rear side of the support frame for supporting the second clamping column from the rear side to prevent the second clamping column from moving backward, a foot pedal is arranged inside the movable frame, the foot pedal is rotatably mounted in the movable frame through the second rotating shaft, a foot pedal portion for stepping is arranged at the rear end of the foot pedal, and the upper end of the front end of the foot pedal is arranged The first and second ends of the sprocket wheel are connected to the second end of the sprocket wheel, and the second end of the sprocket wheel is connected to the first end of the sprocket wheel by the spring, and the spring is pressed against the second end of the sprocket wheel. On the foot pedal, the other end of the torsion spring is pressed against the first rotating shaft, and the foot pedal is in the extreme position of forward rotation under the action of the torsion spring; the support column includes an outer tube, an inner tube and a driving screw rod, the inner tube can be slidably arranged in the outer tube along the axial direction, the bottom end of the inner tube extends out of the outer tube and is fixedly connected to the movable frame, a nut is arranged inside the inner tube, the upper part of the driving screw rod is rotatably connected to the top end of the outer tube, the lower part of the driving screw rod extends into the inner tube and is threadedly connected to the nut, and the top end of the driving screw rod is fixedly connected to a hand handle; in normal use, the support frame rotates backward around the first rotating shaft Until the second clamping post is clamped in the first clamping slot; when the support frame needs to be stored, the support frame is pulled to rotate forward around the first rotation axis until the first clamping post is clamped in the second clamping slot. During this process, the support frame can be guided to rotate forward around the first rotation axis by stepping on the foot pedal until the first clamping post is in place, and then the foot pedal is released to make the first clamping post clamped in the second clamping slot; when it is needed again, the foot pedal is stepped on, and during the process of the foot pedal rotating around the second rotation axis, the first clamping post is squeezed out of the second clamping slot, and under the action of gravity, the support frame rotates backward around the first rotation axis until the second clamping post is clamped in the first clamping slot.

2. The retractable bracket wheel according to claim 1, characterized in that: The front side of the support frame is provided with a gripping portion for users to hold conveniently.

3. The retractable bracket wheel according to claim 1, characterized in that: The top end of the driving screw rod is fixedly connected with a receiving groove, and the hand handle is hinged to one end of the receiving groove through a hinge shaft.

4. The retractable bracket wheel according to claim 1, characterized in that: The support frame includes a left support plate and a right support plate, the left support plate and the right support plate are respectively arranged on the left and right sides of the movable frame, and the first clamping column and the second clamping column are both arranged between the left support plate and the right support plate and are fixedly connected to the left support plate and the right support plate.

5. The retractable bracket wheel according to claim 1, characterized in that: The movable frame is composed of a left side plate, a top plate and a right side plate which are connected in sequence. The movable frame has a receiving cavity with openings on the front side, the rear side and the lower side. The foot pedal is arranged in the receiving cavity.

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