Folding trundle and underframe with same

Abstract

The utility model discloses a folding caster and a chassis with the folding caster, and the folding caster comprises a support which is provided with a rotating shaft and can rotate around the rotating shaft to form an unfolded state and a folded state; the wheel body is rotationally mounted on the bracket; wherein the support further comprises a locking structure, the locking structure enables the support to maintain an unfolded state or a folded state, the locking structure comprises a telescopic piece capable of stretching out and drawing back relative to the support, and the support can rotate around the rotating shaft when the telescopic piece retracts into the support and stops rotating when the telescopic piece stretches out of the support. According to the folding trundle, the problem that a traditional trundle is insufficient in folding stability is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of foldable casters, in particular to a foldable caster and a base frame having the same. Background Art

[0002] In modern industry and daily life, casters are a common mobility aid and are widely used in many fields such as medical equipment, furniture, logistics and transportation. Casters not only need to provide stable load-bearing and mobility in working state, but also need to be able to be easily folded up during storage or transportation to reduce space occupation. Traditional casters usually use simple folding mechanisms, which are often not stable enough. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model adopts the following technical solutions:

[0004] The utility model provides a folding caster to solve the problem of insufficient folding stability of traditional casters.

[0005] The utility model also provides a base frame with the foldable casters.

[0006] A foldable caster according to a first aspect of the present invention includes:

[0007] A bracket, wherein a rotation axis is provided on the bracket, and the bracket can rotate around the rotation axis to form an unfolded state and a folded state;

[0008] A wheel body, rotatably mounted on the bracket;

[0009] Among them, the bracket also includes a locking structure, which enables the bracket to maintain an unfolded state or a folded state. The locking structure includes a telescopic part that can be extended and retracted relative to the bracket. The bracket can rotate around the rotation axis when the telescopic part is retracted into the bracket and stops rotating when the telescopic part extends out of the bracket.

[0010] A foldable caster according to an embodiment of the utility model has at least the following beneficial effects: by arranging a locking structure on the caster bracket, the caster can maintain an unfolded state and a folded state, the telescopic part of the locking structure can be telescoped relative to the bracket, the bracket can rotate around the rotation axis when the telescopic part is retracted into the bracket and stops rotating when the telescopic part is extended out of the bracket, thereby solving the problem of insufficient folding stability of traditional casters.

[0011] According to some embodiments of the present invention, the bracket also includes a locking device for locking the locking structure, and the locking device includes an elastic component, one end of which abuts against the telescopic member so that the telescopic member remains in a state of extending out of the bracket or retracting into the bracket.

[0012] According to some embodiments of the utility model, the telescopic part is provided with a slope, and the locking device also includes a driving block slidably matched with the slope, and the driving block is slidably connected to the bracket; when the locking device slides relative to the bracket, the driving block pushes the slope so that the telescopic part overcomes the force applied by the elastic component and changes its state.

[0013] According to some embodiments of the present invention, the bracket further includes a first sliding groove, the elastic component and the telescopic component are both arranged in the first sliding groove, and the telescopic component can slide in the first sliding groove.

[0014] According to some embodiments of the present invention, the bracket further includes a driving slide groove for limiting the movement of the driving block and connected to the first slide groove, and the driving block is slidably connected in the driving slide groove.

[0015] According to some embodiments of the utility model, a limiting slide groove is provided on the driving block, and a limiting rod passing through the limiting slide groove is provided on the driving slide groove, so that the driving block slides in the driving slide groove.

[0016] According to some embodiments of the utility model, a top cover is provided on the driving block.

[0017] According to some embodiments of the present utility model, a second slide groove is provided at the bottom of the first slide groove, and a guide member passing through the second slide groove is connected to the bottom of the telescopic member.

[0018] According to some embodiments of the utility model, a groove is provided on the telescopic member, the ramp is arranged in the groove, and the driving block is inserted in the groove to cooperate with the ramp.

[0019] A base frame according to the second aspect embodiment of the utility model includes a folding caster according to the first aspect embodiment of the utility model and a base frame body, and the base frame body is provided with a first clamping hole and a second clamping hole. When the telescopic part is clamped into the first clamping hole, the bracket is in an unfolded state, and when the telescopic part is clamped into the second clamping hole, the bracket is in a folded state.

[0020] A base frame according to an embodiment of the utility model has at least the following beneficial effects: by arranging a first clamping hole and a second clamping hole on the base frame body, the telescopic member cooperates with the first clamping hole to form an unfolded state or the telescopic member cooperates with the second clamping hole to form a folded state, thereby solving the problem of insufficient folding stability of traditional casters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of an expanded state of an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of a folded state of an embodiment of the utility model;

[0024] Figure 4 It is a front view of an embodiment of the utility model;

[0025] Figure 5 A cross-sectional view of an embodiment of the utility model;

[0026] Figure 6 A cross-sectional view of another embodiment of the utility model;

[0027] Figure 7 A schematic diagram of a driving block according to an embodiment of the utility model;

[0028] Figure 8 A schematic diagram of a driving chute according to an embodiment of the utility model;

[0029] Fig. 9 A schematic diagram of a telescopic member according to an embodiment of the utility model;

[0030] Fig.10 A cross-sectional view of a telescopic member according to an embodiment of the utility model;

[0031] Fig.11 This is a schematic diagram of a first slide slot according to an embodiment of the utility model. DETAILED DESCRIPTION

[0032] The utility model provides the following description with reference to the accompanying drawings to help fully understand the various embodiments of the utility model as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the utility model.

[0033] In the description of the present invention, descriptions of orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] It will be understood that when one element (eg, a first element) is “connected” to another element (eg, a second element), the element may be directly connected to the other element or an intervening element (eg, a third element) may be present between the element and the other element.

[0035] An embodiment of the utility model provides a foldable caster, comprising:

[0036] A support 1, wherein a rotation axis 2 is provided on the support 1, and the support 1 can rotate around the rotation axis 2 to form an unfolded state and a folded state;

[0037] The wheel body 3 is rotatably mounted on the bracket 1;

[0038] Among them, the bracket 1 also includes a locking structure 11, which enables the bracket 1 to maintain an unfolded state or a folded state. The locking structure 11 includes a telescopic member 101 that can be extended and retracted relative to the bracket 1. The bracket 1 can rotate around the rotating axis 2 when the telescopic member 101 is retracted into the bracket 1 and stops rotating when the telescopic member 101 is extended out of the bracket 1.

[0039] The bracket 1 is the main part of the caster, which is made of materials such as metal or plastic and has sufficient strength and durability; the rotating shaft 2 is the center point where the bracket 1 can rotate, and a folding caster of the present application is unfolded or folded around this shaft; the wheel body 3 is the part that actually contacts the ground, usually made of rubber, plastic or other wear-resistant materials to reduce friction and provide good mobility; the position of the caster can be fixed as needed through the locking structure 11; the locking structure 11 can be mechanical, such as a spring-loaded clip or bolt, or electronic, such as an electromagnetic lock.

[0040] The unfolded state formed by the rotation of the bracket 1 means that when the caster needs to be used, the bracket 1 rotates around the rotation axis 2 so that the wheel body 3 contacts the ground for easy movement; the folded state formed by the rotation of the bracket 1 means that when the caster does not need to be moved, the bracket 1 can be folded up to reduce the occupied space and facilitate storage or fixation.

[0041] What needs to be understood here is that a folding caster of the utility model is fixed by a rotating shaft 2, and the bracket 1 can rotate around the rotating shaft 2 to make the folding caster of the present application form an unfolded state and a folded state; the locking structure 11 on the bracket 1 is used to maintain the unfolded state and the folded state of the folding caster of the present application.

[0042] The telescopic member 101 is a telescopic part of the locking structure 11, which can realize the locking and unlocking of the bracket 1 by telescoping, and this telescopic action can be realized by a spring, hydraulic or pneumatic system; the telescopic member 101 can be spherical, or rectangular or other shapes. When the telescopic member 101 extends out of the bracket 1, it interacts with a certain component outside the bracket 1, thereby preventing the bracket 1 from rotating around the rotation axis 2, and realizing the locked state; when the telescopic member 101 is retracted into the bracket 1, it is out of contact with the external component, allowing the bracket 1 to rotate freely, and realizing the unlocked state; the telescopic member 101 can be telescoped by the action of external force, or telescoped by a certain structure; the telescopic action can be controlled by manual operation (such as pressing a button or pulling a lever) or automatic operation (such as sensing weight changes or using remote control signals).

[0043] In some embodiments, the bracket 1 further includes a locking device 102 for locking the locking structure 11 . The locking device 102 includes an elastic component 103 . One end of the elastic component 103 abuts against the telescopic member 101 so that the telescopic member 101 remains extended from the bracket 1 or retracted into the bracket 1 .

[0044] The elastic component 103, such as a spring or an elastic pad, is used to provide the necessary force to limit the movement of the telescopic member 101 and ensure the stability of the locking structure 11. The locking device 102 is a component that interacts with the telescopic member 101, and it fixes or releases the telescopic member 101 through the action of the elastic component 103.

[0045] The elastic component 103 has two use states. The first use state is: when the telescopic member 101 is extended and interacts with the locking device 102, the elastic component 103 is compressed, providing a locking force to fix the bracket 1; when the telescopic member 101 is retracted, the elastic component 103 releases its force, allowing the bracket 1 to rotate around the rotation axis 2 to achieve unlocking. The second use state is: when the telescopic member 101 is extended and interacts with the locking device 102, the elastic component 103 releases its force, providing a locking force to fix the bracket 1; when the telescopic member 101 is retracted, the elastic component 103 is compressed, allowing the bracket 1 to rotate around the rotation axis 2 to achieve unlocking.

[0046] The extension and retraction of the retractable member 101 can be achieved by manual control (such as a button, a lever) or automatic control (such as a sensor, an electronic signal).

[0047] In order to further improve the stability and reliability of the caster, a pair of symmetrically placed telescopic members 101 may be designed to maintain the unfolded state or folded state of the bracket 1 , and the telescopic state of the telescopic members 101 may be synchronously controlled by the locking device 102 .

[0048] Furthermore, a slope 106 is provided on the telescopic member 101, and the locking device 102 also includes a driving block 107 that slidably cooperates with the slope 106, and the driving block 107 is slidably connected to the bracket 1; when the locking device 102 slides relative to the bracket 1, the driving block 107 pushes the slope 106, so that the telescopic member 101 overcomes the force applied by the elastic component 103 and changes its state.

[0049] The driving block 107 in the locking device 102 cooperates with the slope 106, and can be a component set on the bracket 1, or a component integrated with the telescopic member 101. The shape of the driving block 107 and the shape of the slope 106 cooperate with each other to achieve precise control of the telescopic member 101. Optionally, the slope 106 is set to be inclined downward toward the inside of the bracket 1 or to be inclined downward toward the outside of the bracket 1; Figure 6 As shown, when the slope 106 is tilted downward toward the inside of the bracket 1, the elastic component 103 is in the first use state mentioned above, and the driving block 107 acts on the slope 106 of the telescopic member 101 to extend the telescopic member 101. When the driving block 107 is removed, the telescopic member 101 retracts under the action of the elastic component 103. When the driving block 107 is in the initial state, it acts on the slope 106 of the telescopic member 101 to extend the telescopic member 101. The driving block 107 may be kept in contact with the telescopic member 101 under the action of friction or elastic force, etc.; Figure 5 As shown, when the slope 106 is tilted downward toward the outside of the bracket 1, the elastic component 103 is in the second usage state mentioned above. At this time, the driving block 107 acts on the slope 106 of the telescopic member 101 to retract the telescopic member 101. When the driving block 107 is removed, the telescopic member 101 extends under the action of the elastic component 103.

[0050] Furthermore, the bracket 1 further comprises a first sliding groove 105 , in which the elastic component 103 and the telescopic member 101 are both arranged, and the telescopic member 101 can slide in the first sliding groove 105 .

[0051] The first slide groove 105 is a part of the bracket 1, providing a guide and sliding path for the telescopic member 101 and the elastic member 103. The design of the first slide groove 105 allows the telescopic member 101 to slide smoothly therein. The telescopic member 101 slides in the first slide groove 105, and one end of the telescopic member 101 is used to interact with a certain part outside the bracket 1 to maintain the unfolded or folded state of the bracket 1. The other end of the telescopic member 101 is connected to the elastic member 103, such as a spring, to provide the necessary force to push the telescopic member 101 to move in the slide groove to achieve locking or unlocking.

[0052] Furthermore, the bracket 1 further includes a driving slide groove 112 for limiting the movement of the driving block 107 and communicating with the first slide groove 105 , and the driving block 107 is slidably connected in the driving slide groove 112 .

[0053] Furthermore, a limiting slide groove 113 is provided on the driving block 107 , and a limiting rod 114 passing through the limiting slide groove 113 is provided on the driving slide groove 112 , so that the driving block 107 slides in the driving slide groove 112 .

[0054] The driving chute 112 is used to limit the moving range of the driving block 107 to prevent it from exceeding the designed motion trajectory. The driving block 107 is provided with a limiting chute 113, which is a channel through which the limiting rod 114 passes, to ensure that the driving block 107 slides on the correct path. The limiting rod 114 passes through the limiting chute 113 and interacts with the driving chute 112 to control the movement of the driving block 107 and prevent the driving block 107 from being separated from the driving chute 112.

[0055] Furthermore, a top cover 111 is provided on the driving block 107 .

[0056] The top cover 111 is provided to facilitate pressing in the driving block 107 or lifting the driving block 107 .

[0057] In some embodiments, a second slide groove 108 is provided at the bottom of the first slide groove 105 , and a guide member 109 passing through the second slide groove 108 is connected to the bottom of the telescopic member 101 .

[0058] The guide member 109 limits the telescopic member 101 to slide in the second sliding groove 108, thereby improving the stability and reliability of the sliding.

[0059] In some embodiments, a groove 110 is provided on the telescopic member 101 , the ramp 106 is disposed in the groove 110 , and the driving block 107 is inserted in the groove 110 and matched with the ramp 106 .

[0060] An embodiment of the utility model also provides a base frame, including a folding caster of the above embodiment of the utility model and a base frame body, the base frame body is provided with a first clamping hole 61 and a second clamping hole 62, when the telescopic member 101 is clamped into the first clamping hole 61, the bracket 1 is in an unfolded state, when the telescopic member 101 is clamped into the second clamping hole 62, the bracket 1 is in a folded state.

[0061] The chassis body is provided with a first clamping hole 61, which is designed to cooperate with the telescopic member 101 of the caster. When the telescopic member 101 is clamped into the first clamping hole 61, the bracket 1 of the caster is locked in the unfolded state, allowing the caster to be used normally; the chassis body is also provided with a second clamping hole 62, which is also matched with the telescopic member 101 of the caster. When the telescopic member 101 is clamped into the second clamping hole 62, the bracket 1 of the caster is locked in the folded state, which is convenient for storage or transportation; the positions of the first clamping hole 61 and the second clamping hole 62 on the chassis body are precisely designed to ensure that when the telescopic member 101 is clamped into any clamping hole, the caster can be stably maintained in the corresponding state.

[0062] The terms and words used in the above description and claims are not limited to the literal meanings, but are only used by the applicant to enable a clear and consistent understanding of the utility model. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the utility model is provided only for illustration, and not for limiting the utility model as defined by the attached claims and their equivalents.

Claims

1. A folding caster, characterized in that: include: A bracket (1), wherein a rotation axis (2) is provided on the bracket (1), and the bracket (1) can be rotated around the rotation axis (2) to form an unfolded state and a folded state; A wheel body (3) rotatably mounted on the bracket (1); The support (1) further comprises a locking structure (11), wherein the locking structure (11) enables the support (1) to maintain an unfolded state or a folded state, wherein the locking structure (11) comprises a telescopic member (101) which can be extended and retracted relative to the support (1), and the support (1) can rotate around the rotation axis (2) when the telescopic member (101) is retracted into the support (1) and stops rotating when the telescopic member (101) is extended out of the support (1).

2. A foldable caster according to claim 1, characterized in that: The bracket (1) further comprises a locking device (102) for locking the locking structure (11), the locking device (102) comprising an elastic component (103), one end of the elastic component (103) abutting against the telescopic component (101) so that the telescopic component (101) remains in a state of extending out of the bracket (1) or in a state of being retracted into the bracket (1).

3. A foldable caster according to claim 2, characterized in that: The telescopic member (101) is provided with a slope (106), and the locking device (102) further comprises a driving block (107) slidably matched with the slope (106), and the driving block (107) is slidably connected to the bracket (1); when the locking device (102) slides relative to the bracket (1), the driving block (107) pushes the slope (106) so that the telescopic member (101) overcomes the force applied by the elastic component (103) and changes its state.

4. The foldable caster according to claim 3, characterized in that: The bracket (1) further comprises a first sliding groove (105), the elastic component (103) and the telescopic component (101) are both arranged in the first sliding groove (105), and the telescopic component (101) can slide in the first sliding groove (105).

5. The foldable caster according to claim 4, characterized in that: The bracket (1) further comprises a driving slide groove (112) for limiting the movement of the driving block (107) and communicating with the first slide groove (105), and the driving block (107) is slidably connected in the driving slide groove (112).

6. The foldable caster according to claim 5, characterized in that: The driving block (107) is provided with a limiting slide groove (113), and the driving slide groove (112) is provided with a limiting rod (114) passing through the limiting slide groove (113), so that the driving block (107) slides in the driving slide groove (112).

7. The foldable caster according to claim 6, characterized in that: The driving block (107) is provided with a top cover (111).

8. A foldable caster according to any one of claims 4 to 7, characterized in that: A second slide groove (108) is provided at the bottom of the first slide groove (105), and a guide member (109) passing through the second slide groove (108) is connected to the bottom of the telescopic member (101).

9. A foldable caster according to any one of claims 3 to 7, characterized in that: The telescopic member (101) is provided with a groove (110), the slope (106) is arranged in the groove (110), and the driving block (107) is inserted in the groove (110) and matched with the slope (106).

10. A chassis, characterized in that: It comprises a foldable caster as claimed in any one of claims 1 to 9 and a base frame body, wherein a first clamping hole (61) and a second clamping hole (62) are provided on the base frame body, and when the telescopic member (101) is clamped into the first clamping hole (61), the bracket (1) is in an unfolded state, and when the telescopic member (101) is clamped into the second clamping hole (62), the bracket (1) is in a folded state.

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