Trundle and transportation equipment
By designing casters with sliders and elastic parts, the brake and unlocking of the wheels are achieved, solving the problem that manpower can hardly stop heavy equipment in the prior art, and improving the convenience of the equipment.
Patent Information
- Application Number
- CN202411233093.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-01-03
AI Technical Summary
In the prior art, when the load load weight is large, it is difficult for manpower to effectively stop the equipment equipped with casters, and the existing casters cannot keep the wheels in the brake state.
A caster including a bracket, wheel, pedal, slider and first elastic member is designed. Through the sliding of the slider on the clamping and guiding surface and the pulling force of the elastic member, the brake stop and unlocking of the wheel is achieved to ensure that the wheel is maintained. In brake or unlocked state.
It effectively solves the problem that heavy equipment is difficult to stop when it stops, ensures that the wheels remain stable under the brake state, and improves the convenience of use of transportation equipment.
Smart Images
Figure CN119239176A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mobile devices, and in particular to a caster and a transport device. Background Art
[0002] Casters can be installed at the bottom of various equipment to facilitate the movement of the equipment, or used to manufacture handling devices, such as carts, to facilitate the transportation of materials.
[0003] In the related art, when equipment or transport devices equipped with casters need to stop, human power can be used to provide pulling force to stop the equipment or transport devices. However, when the weight of the equipment or transport devices is large, the inertia is large, and it is difficult to stop the casters manually. Therefore, in the prior art, there is a caster with a pedal. When a person steps on the pedal, the pedal will press against the wheel of the caster to stop the wheel through friction.
[0004] However, the casters in the prior art only have the function of stopping the wheels, but cannot keep the wheels in a braking state. Summary of the invention
[0005] The present application is intended to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes a caster that can keep the wheel in a braked state.
[0006] Also, a transport device comprising the caster is provided.
[0007] A caster according to an embodiment of the first aspect of the present application includes: a bracket, a wheel, a pedal, a slider and a first elastic member.
[0008] The wheels are rotatably arranged on the bracket;
[0009] The pedal is rotatably arranged on the bracket, and a first clamping position and a second clamping position are formed on the side surface of the pedal;
[0010] The slider is slidably arranged on the bracket and is located between the wheel and the pedal; the first end of the slider is slidably abutted against the side of the pedal, and when the pedal rotates, the first end of the slider can slide along the side of the pedal, and the pedal can push or pull the slider to make the second end of the slider approach or move away from the wheel; and the first clamping position and the second clamping position are located on the sliding path of the first end of the slider, when the first end of the slider is clamped into the first clamping position, the second end of the slider abuts against the wheel, and when the first end of the slider is clamped into the second clamping position, the second end of the slider moves away from the wheel;
[0011] Two ends of the first elastic member are respectively connected to the pedal and the slider, and are used to give the pedal and the slider a pulling force to move them closer to each other.
[0012] According to a first aspect of the present application, a caster has at least the following beneficial effects: a pedal and a slider are connected by a first elastic member, so that the pedal can push or pull the slider, and when the pedal is turned, the slider can move closer to or farther from the wheel to stop or release the wheel. In addition, by engaging the slider in the first and second positions, the slider is kept in a position abutting against the wheel or away from the wheel, thereby keeping the wheel in a braked state or an unlocked state.
[0013] According to some embodiments of the present application, the pedal forms a guide surface, the guide surface is a curved surface, the guide surface is located between the first clamping position and the second clamping position, and when the pedal rotates, the first end of the slider can slide on the guide surface.
[0014] According to some embodiments of the present application, the first end of the pedal close to the slider is configured as an eccentric cam structure, and the eccentric cam structure is sequentially formed with the first clamping position, the guide surface and the second clamping position along its circumference.
[0015] According to some embodiments of the present application, the pedal is rotatably connected to the bracket via a rotating member, and the rotating member passes through the pedal and the bracket so that the pedal can rotate around the axis of the rotating member; the slider is formed with a hook groove; hooks are formed at both ends of the first elastic member, and the two hooks are respectively hooked on the rotating member and the hook groove.
[0016] According to some embodiments of the present application, a first guide structure is provided on the inner side surface of the bracket, and a second guide structure is provided on a side of the slider close to the bracket, and the first guide structure is slidably matched with the second guide structure.
[0017] According to some embodiments of the present application, the first guide structure is a guide rib, and the second guide structure is a guide groove.
[0018] According to some embodiments of the present application, the sliding block is provided with a boss, the inner side of the bracket is provided with a guide surface, and the boss and the guide surface are slidably matched.
[0019] According to some embodiments of the present application, the inner walls of the first clamping position and the second clamping position are both formed into an arc surface, and the end of the sliding block close to the pedal is also formed into an arc surface.
[0020] According to some embodiments of the present application, a rubber sheet is provided at the second end of the slider, and the slider abuts against the wheel via the rubber sheet.
[0021] According to some embodiments of the present application, when the first end of the slider is locked into the first locking position, the tangent of the contact position between the slider and the first locking position is along the first direction, the slider moves along the second direction relative to the bracket, and the angle between the first direction and the second direction is greater than or equal to 90°.
[0022] A transport device according to a second aspect embodiment of the present application comprises the caster of the first aspect embodiment.
[0023] A transport device according to an embodiment of the second aspect of the present application has at least the following beneficial effects: including all the beneficial effects of the caster of the embodiment of the first aspect, which will not be repeated here.
[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:
[0026] Figure 1 A cross-sectional view of a caster according to an embodiment of the present application;
[0027] Figure 2 It is a schematic diagram of the cooperation between the pedal and the slider, wherein the first end is clamped in the second clamping position;
[0028] Figure 3 It is a schematic diagram of the cooperation between the pedal and the slider, wherein the first end is clamped in the first clamping position;
[0029] Figure 4 for Figure 1 Side view of the middle pedal;
[0030] Figure 5 A cross-sectional view of a caster in another direction according to an embodiment of the present application;
[0031] Figure 6 A partial structural schematic diagram of a caster according to an embodiment of the present application;
[0032] Figure 7 A cross-sectional view of a caster in another direction according to an embodiment of the present application;
[0033] Figure 8 for Figure 1 Schematic diagram of the structure of the middle slider.
[0034] Reference numerals:
[0035] Bracket 100; guide rib 110; guide surface 120;
[0036] Wheel 200;
[0037] Pedal 300; first latching position 310; second latching position 320; guide surface 330; eccentric cam structure 340; rotating member 350;
[0038] Slider 400; first end 410; second end 420; hook groove 430; guide groove 440; rubber sheet 450, convex bump 451; boss 460;
[0039] A first elastic member 500; a hook 510;
[0040] Bottom plate 610; wave plate 620; connecting member 630; first steel ball 640; second steel ball 650;
[0041] Screw 710 , nut 720 , top sleeve 730 , bearing 740 , inner ring 741 , outer ring 742 , rolling element 743 . DETAILED DESCRIPTION
[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0043] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and 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 application.
[0044] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0045] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0046] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0047] Reference Figures 1 to 4 As shown, a caster according to an embodiment of the first aspect of the present application includes: a bracket 100, a wheel 200, a pedal 300 and a slider 400.
[0048] The wheel 200 is rotatably disposed on the bracket 100;
[0049] The pedal 300 is rotatably disposed on the bracket 100, and a first locking position 310 and a second locking position 320 are formed on the side of the pedal 300;
[0050] The slider 400 is slidably disposed on the bracket 100 and is located between the wheel 200 and the pedal 300; the first end 410 of the slider 400 is slidably abutted against the side of the pedal 300, and when the pedal 300 rotates, the first end 410 of the slider 400 can slide along the side of the pedal 300, and the pedal 300 can push or pull the slider 400 to make the second end 420 of the slider 400 approach or move away from the wheel 200; and the first clamping position 310 and the second clamping position 320 are located on the sliding path of the first end 410 of the slider 400, when the first end 410 of the slider 400 is clamped into the first clamping position 310, the second end 420 of the slider 400 abuts against the wheel 200, and when the first end 410 of the slider 400 is clamped into the second clamping position 320, the second end 420 of the slider 400 moves away from the wheel 200;
[0051] The first elastic member 500 has two ends connected to the pedal 300 and the slider 400 respectively, and is used to apply a pulling force to the pedal 300 and the slider 400 to move them closer to each other.
[0052] The following is one of the operation processes of a caster of the present application:
[0053] The pedal 300 is rotated forward, and the side surface of the pedal 300 slides relative to the first end 410 of the slider 400. The pedal 300 pushes the slider 400, so that the second end 420 of the slider 400 approaches and abuts against the wheel 200, thereby stopping the slider 400. In addition, referring to Figure 3When the pedal 300 rotates until the second end 420 of the slider 400 abuts against the wheel 200, the first end 410 of the slider 400 will be clamped into the first clamping position 310. Through the limiting effect of the first clamping position 310 and the pulling force of the first elastic member 500, the first end 410 of the slider 400 is tightly clamped in the first clamping position 310 and is not easy to escape from the first clamping position 310, so that the slider 400 remains in the position abutting against the wheel 200, thereby keeping the wheel 200 in a braking state.
[0054] Similarly, the pedal 300 is rotated in the opposite direction, the first end 410 of the slider 400 is disengaged from the first clamping position 310, and the side surface of the pedal 300 slides relative to the first end 410 of the slider 400, and the pedal 300 pulls the slider 400 away from the wheel 200 through the first elastic member 500, thereby releasing the wheel 200; Figure 2 When the pedal 300 rotates to a certain angle and the first end 410 of the slider 400 is inserted into the second position 320, the first end 410 of the slider 400 is tightly stuck in the second position 320 through the limiting effect of the second position 320 and the pulling force of the first elastic member 500, and is not easy to escape from the second position 320, so that the slider 400 is kept away from the wheel 200, thereby keeping the wheel 200 in an unlocked state.
[0055] It should be noted that the above-mentioned forward rotation and reverse rotation are only examples and are not limited here.
[0056] It can be understood that a caster of the present application can keep the slider 400 in a position abutting against or away from the wheel 200 through the first clamping position 310 and the second clamping position 320, thereby keeping the wheel 200 in a braking state or an unlocked state, and has a simple structure and low production cost.
[0057] Regarding the specific structure of the pedal 300:
[0058] In this embodiment, refer to Figure 2 and Figure 3 The pedal 300 forms a guide surface 330 , which is an arc surface. The guide surface 330 is located between the first clamping position 310 and the second clamping position 320 . When the pedal 300 rotates, the first end 410 of the slider 400 can slide on the guide surface 330 .
[0059] It can be understood that the guide surface 330 is located between the first locking position 310 and the second locking position 320, and the first end 410 of the slider 400 can slide on the guide surface 330. When it moves to the end of the guide surface 330, it can be locked into the first locking position 310 or the second locking position 320; the guide surface 330 is set as an arc surface to make the sliding cooperation between the pedal 300 and the slider 400 smoother, so that the pedal 300 can better push the slider 400.
[0060] Specifically, refer to Figure 4 The first end 410 of the pedal 300 close to the slider 400 is provided with an eccentric cam structure 340, and the eccentric cam structure 340 is sequentially formed with a first clamping position 310, a guide surface 330 and a second clamping position 320 along its circumference.
[0061] In other embodiments, the guide surface 330 may also be a multi-section straight surface or a wavy surface. It is only necessary to set the first clamping position 310 and the second clamping position 320 as a groove structure so that the first clamping position 310 and the second clamping position 320 are concave relative to the side of the pedal 300, so that the slider 400 is not easy to withdraw from the first clamping position 310 and the second clamping position 320.
[0062] It should be noted that when the first end 410 of the slider 400 rotates into the first position 310, the first end 410 abuts against the inner wall of the first position 310, so that the first end 410 is not easy to withdraw from the first position 310. In order to improve the stability of the first end 410 when it is in the first position 310, in this embodiment, Figure 3 When the first end 410 of the slider 400 is inserted into the first locking position 310, the tangent of the contact position between the slider 400 and the first locking position 310 is along the first direction, and the slider 400 moves along the second direction relative to the bracket 100, and the angle between the first direction and the second direction is greater than or equal to 90°.
[0063] It can be understood that after the first end 410 is located in the first locking position 310, the slider 400 applies an extrusion force to the bracket 100 in the first direction, so that the angle between the first direction and the second direction is set to be greater than or equal to 90°, so that the extrusion force applied by the slider 400 to the bracket 100 has a larger component force along the second direction, so as to increase the friction between the slider 400 and the bracket 100, so that the first end 410 can be stably stuck in the first locking position 310.
[0064] Specifically, refer to Figure 3 The included angle between the first direction and the second direction is α, and α is greater than or equal to 95°, so as to avoid the first direction and the second direction being perpendicular, which makes it difficult for the first end 410 to detach from the first clamping position 310 .
[0065] Regarding the connection method between the first elastic member 500, the pedal 300 and the bracket 100:
[0066] In this embodiment, refer to Figure 1 The caster pedal 300 of the present application is rotatably connected to the bracket 100 via a rotating member 350, and the rotating member 350 penetrates the pedal 300 and the bracket 100 so that the pedal 300 can rotate around the axis of the rotating member 350; Figure 8 The slider 400 is formed with a hook groove 430 ; hooks 510 are formed at both ends of the first elastic member 500 , and the two hooks 510 are respectively hooked on the rotating member 350 and the hook groove 430 .
[0067] It is understandable that the pedal 300 is rotatably connected to the bracket 100 through the rotating member 350, and the pedal 300 can rotate around the axis of the rotating member 350. In addition, the first elastic member 500 is hooked in the rotating member 350 and the hook groove 430 through the hooks 510 at both ends thereof, thereby connecting the pedal 300 and the bracket 100. Specifically, in order to improve the hooking effect of the first elastic member 500, the hook 510 is set to be longer.
[0068] Specifically, the rotating member 350 is a rivet, and the first elastic member 500 is a tension spring.
[0069] In other embodiments, both ends of the first elastic member 500 may also be connected to the pedal 300 and the bracket 100 by winding, welding or other connection methods.
[0070] Regarding the connection method between the bracket 100 and the slider 400:
[0071] Reference Figure 5 A first guide structure is disposed on the inner side of the bracket 100 , and a second guide structure is disposed on a side of the slider 400 close to the bracket 100 , and the first guide structure and the second guide structure are slidably matched.
[0072] It is understandable that, when the slider 400 approaches or moves away from the wheel 200 , the first guide structure and the second guide structure slide in cooperation with each other to improve the sliding stability and directional accuracy of the slider 400 .
[0073] Specifically, in this embodiment, the first guide structure is the guide rib 110, and the second guide structure is the guide groove 440. It is understandable that when the slider 400 approaches or moves away from the wheel 200, the slider 400 slides relative to the guide rib 110 through the guide groove 440.
[0074] In other embodiments, the first guide structure may also be a guide groove 440 , and the second guide structure may also be a guide rib 110 .
[0075] However, it should be noted that in the caster of the present application, the wall thickness of the bracket 100 is relatively thin, and it is not easy to set the guide groove 440, while the slider 400 has a certain thickness. Therefore, preferably, the outer side surface of the bracket 100 is punched to make it concave, so that the inner side surface of the bracket 100 is convex to form the guide rib 110, so that the guide rib 110 and the bracket 100 are integrally formed.
[0076] It should be noted that, in the initial state, the first end 410 of the slider 400 is locked in the second locking position 320, and the pedal 300 is stepped on to push the slider 400 so that the slider 400 slides relative to the bracket 100, and the guide rib 110 slides in the guide groove 440. At the same time, the pedal 300 will give the first end 410 of the slider 400 an upward force, resulting in an increase in the friction between the guide rib 110 and the guide groove 440, so that the slider 400 may have difficulty in sliding. In order to avoid the problem that the slider 400 is difficult to slide when the pedal 300 is stepped on, in this embodiment, the reference Figure 6 and Figure 8 The slider 400 is provided with a boss 460 , and the inner side of the bracket 100 is provided with a guide surface 120 , and the boss 460 and the guide surface 120 are slidably matched.
[0077] It can be understood that the guide surface 120 is inclined and one side of the boss 460 is in contact with the guide surface 120. When the pedal 300 is stepped on, the boss 460 slides along the guide surface 120 while the guide rib 110 slides in the guide groove 440. It should be understood that when the pedal 300 applies an upward force to the first end 410 of the slider 400, the slider 400 transmits the force to the bracket 100 through the boss 460, thereby avoiding the first end 410 from tilting up and causing the friction between the guide rib 110 and the guide groove 440 to increase, so as to allow the guide rib 110 and the guide groove 440 to slide smoothly, thereby ensuring that the slider 400 slides smoothly relative to the bracket 100.
[0078] Specifically, the boss 460 is in surface contact with the guide surface 120 to increase the force-bearing area between the boss 460 and the bracket 100 .
[0079] Regarding the specific structure of the first clamping position 310 and the second clamping position 320:
[0080] Reference Figure 4 In this embodiment, the inner walls of the first latching position 310 and the second latching position 320 are both formed into an arc surface, and the end of the slider 400 close to the pedal 300 is also formed into an arc surface.
[0081] It is understandable that the inner wall of the first clamping position 310, the inner wall of the second clamping position 320 and the first end 410 of the slider 400 are all set to be arc surfaces, so that the slider 400 can slide into or out of the first clamping position 310 and the second clamping position 320 more easily, making the pedal 300 more comfortable to step on. In addition, the shapes of the first clamping position 310 and the second clamping position 320 are more compatible with the shape of the slider 400. When the slider 400 is clamped into the first clamping position 310 or the second clamping position 320, the slider 400 can better abut against the inner wall of the first clamping position 310 or the second clamping position 320.
[0082] Specifically, one end of the slider 400 close to the pedal 300 is configured as a convex structure, and the convex structure forms an arc surface.
[0083] To improve braking effect:
[0084] Reference Figure 8 A rubber sheet 450 is provided at the second end 420 of the slider 400 , and the slider 400 abuts against the wheel 200 through the rubber sheet 450 .
[0085] It is understandable that the slider 400 abuts against the wheel 200 via the rubber sheet 450, thereby increasing the friction between the slider 400 and the wheel 200 and improving the braking effect.
[0086] Specifically, refer to Figure 8 A plurality of convex bumps 451 are provided on one side of the rubber sheet 450 facing the wheel 200 , and the convex bumps 451 abut against the wheel 200 to improve the locking effect of the rubber sheet 450 on the wheel 200 compared with the friction between 450 and the wheel 200 .
[0087] In order to make the wheel 200 have a rotating effect:
[0088] Reference Figure 1 The caster of the present application also includes a base plate 610, a wave plate 620, a connecting piece 630, a plurality of first steel balls 640 and a plurality of second steel balls 650. The bracket 100 is located between the base plate 610 and the wave plate 620. The first steel ball 640 is arranged between the base plate 610 and the bracket 100. The second steel ball 650 is arranged between the wave plate 620 and the bracket 100. The connecting piece 630 passes through the base plate 610, the bracket 100 and the wave plate 620 in sequence so that the bracket 100 can rotate around the axis of the connecting piece 630.
[0089] It can be understood that the bracket 100 can rotate relative to the base plate 610 through the first steel ball 640, and can rotate relative to the wave plate 620 through the second steel ball 650, and the base plate 610, the bracket 100 and the wave plate 620 are penetrated by the connecting member 630, so that the bracket 100 can rotate around the axis of the connecting member 630, thereby enabling the wheel 200 to rotate.
[0090] Specifically, the plurality of first steel balls 640 and the plurality of second steel balls 650 are distributed around the axis of the connecting member 630 .
[0091] In order to improve the smoothness of the sliding process of the wheel 200, refer to Figure 7 The caster of the present application further comprises a screw 710, a nut 720, a top sleeve 730 and at least two bearings 740. The screw 710 passes through the bracket 100 and the top sleeve 730. The two ends of the top sleeve 730 abut against the two opposite sides of the inside of the bracket 100. A limiting groove is formed on the top sleeve 730. The limiting groove corresponds to the bearing 740 one by one. The inner ring 741 of the bearing 740 is fixed in the limiting groove. The groove width of the limiting groove is consistent with the width of the inner ring 741 of the bearing 740. The outer ring 742 of the bearing 740 rotates relative to the inner ring 741 of the bearing 740 through the rolling body 743 of the bearing 740. The wheel is sleeved on the outer ring 742 of the bearing 740 and is fixedly connected to the outer ring 742, so that the wheel rotates relative to the screw 710. The nut 720 is threadedly connected to one end of the screw 710 to cooperate with the screw 710 to lock the wheel 200. It should be understood that since the inner ring 741 of the bearing 740 is fixed in the limiting groove of the top sleeve 730, and the two ends of the top sleeve 730 are abutted against the two opposite sides inside the bracket, when the nut 720 is screwed, the top sleeve 730 is not easy to deform, so that the inner ring 741 of the bearing 740 in the limiting groove is not easy to shift, thereby ensuring the clearance between the inner ring 741 and the outer ring 742 of the bearing 740, ensuring the smooth rolling of the wheel 200.
[0092] A transport device according to a second aspect embodiment of the present application comprises the caster of the first aspect embodiment.
[0093] A transport device according to an embodiment of the present application has at least the following beneficial effects: including all the beneficial effects of the caster of the first aspect embodiment, which will not be repeated here.
[0094] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
Claims
1. A caster, characterized in that: include: Bracket (100); A wheel (200) rotatably disposed on the bracket (100); A pedal (300) is rotatably disposed on the bracket (100), and a first locking position (310) and a second locking position (320) are formed on a side surface of the pedal (300); A slider (400) is slidably disposed on the bracket (100) and is located between the wheel (200) and the pedal (300); a first end (410) of the slider (400) is slidably abutted against a side surface of the pedal (300); when the pedal (300) rotates, the first end (410) of the slider (400) can slide along the side surface of the pedal (300), and the pedal (300) can push or pull the slider (400) so that the second end (420) of the slider (400) is close to or The first locking position (310) and the second locking position (320) are located on the sliding path of the first end (410) of the slider (400); when the first end (410) of the slider (400) is locked in the first locking position (310), the second end (420) of the slider (400) abuts against the wheel (200); and when the first end (410) of the slider (400) is locked in the second locking position (320), the second end (420) of the slider (400) is away from the wheel (200); A first elastic member (500), wherein two ends of the first elastic member (500) are respectively connected to the pedal (300) and the slider (400), and are used to apply a pulling force to bring the pedal (300) and the slider (400) closer to each other.
2. A caster according to claim 1, characterized in that: The pedal (300) forms a guide surface (330), and the guide surface (330) is an arc surface. The guide surface (330) is located between the first clamping position (310) and the second clamping position (320). When the pedal (300) rotates, the first end (410) of the slider (400) can slide on the guide surface (330).
3. A caster according to claim 2, characterized in that: The first end (410) of the pedal (300) close to the slider (400) is provided with an eccentric cam structure (340), and the eccentric cam structure (340) is sequentially formed with the first clamping position (310), the guide surface (330) and the second clamping position (320) along its circumference.
4. A caster according to claim 3, characterized in that: The pedal (300) is rotatably connected to the bracket (100) via a rotating member (350), and the rotating member (350) passes through the pedal (300) and the bracket (100) so that the pedal (300) can rotate around the axis of the rotating member (350); the slider (400) is formed with a hook groove (430); hooks (510) are formed at both ends of the first elastic member (500), and the two hooks (510) are respectively hooked on the rotating member (350) and the hook groove (430).
5. The caster according to claim 1, characterized in that: The inner side surface of the bracket (100) is provided with a first guide structure, and the side of the sliding block (400) close to the bracket (100) is provided with a second guide structure, and the first guide structure and the second guide structure are slidably matched.
6. The caster according to claim 1, characterized in that: The slider (400) is provided with a boss (460), and the inner side of the bracket (100) is provided with a guide surface (120), and the boss (460) and the guide surface (120) are slidably matched.
7. The caster according to claim 1, characterized in that: When the first end (410) of the slider (400) is locked into the first locking position (310), the tangent of the contact position between the slider (400) and the first locking position (310) is along a first direction, and the slider (400) moves along a second direction relative to the bracket (100), and the angle between the first direction and the second direction is greater than or equal to 90°.
8. The caster according to claim 1, characterized in that: The inner walls of the first clamping position (310) and the second clamping position (320) are both formed into arc surfaces, and one end of the sliding block (400) close to the pedal (300) is also formed into an arc surface.
9. The caster according to claim 1, characterized in that: The second end (420) of the slider (400) is provided with a rubber sheet (450), and the slider (400) is in contact with the wheel (200) via the rubber sheet (450).
10. A transport device, characterized in that: Comprising the castor according to any one of claims 1 to 9.