Trundle

Abstract

The utility model relates to a trundle which comprises a fixing plate, a supporting frame, a connecting piece, an idler wheel, a pin shaft, a force applying piece and a pressing plate, the supporting frame is connected with the fixing plate through the connecting piece, the idler wheel is rotatably arranged on the supporting frame, the supporting frame is provided with a connecting part, the pin shaft is arranged on the connecting part, and the force applying piece is rotatably arranged on the pin shaft. The connecting part is provided with a long hole for the force application piece to rotate, and the pressing plate is arranged between the force application piece and the roller; when the force applying piece applies force to the pressing plate, the pressing plate applies friction force to the rolling wheel so that the rolling wheel can be decelerated. The force application piece makes contact with the pressing plate, so that the pressing plate applies friction force to the rolling wheel, and the rolling wheel can be decelerated. Therefore, speed control can be realized, and user injury is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of wheels, in particular to a caster. Background Art

[0002] Casters are a common mechanical accessory installed at the bottom of an appliance to make the appliance move easily and flexibly. They are widely used in scaffolding, shelves, instruments, mechanical equipment, furniture and other fields.

[0003] At present, casters are usually composed of a fixing plate, a support frame, a connector and a roller, etc., for use in various tool carts. However, when the casters are in use, if they encounter an uneven road surface, they may lose speed due to inertia, thereby causing injuries to the user. Utility Model Content

[0004] Based on the above description, the utility model provides a caster, aiming to solve the problem that the speed of existing casters is inconvenient to control.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A caster, comprising a fixed plate, a support frame, a connecting piece and a roller, wherein the support frame is connected to the fixed plate via the connecting piece, and the roller is rotatably disposed on the support frame. The caster further comprises a pin shaft, a force-applying member and a pressure plate, wherein the support frame has a connecting portion, the pin shaft is disposed on the connecting portion, the force-applying member is rotatably disposed on the pin shaft, a long hole is provided on the connecting portion for the force-applying member to rotate, and the pressure plate is disposed between the force-applying member and the roller; when the force-applying member applies force to the pressure plate, the pressure plate applies friction force to the roller, thereby decelerating the roller.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the force-applying member includes a force plate, a limiting plate, a first side plate and a second side plate. The force plate is U-shaped, the limiting plate is arranged at one end of the force plate close to the fixed plate, the first side plate and the second side plate are both arranged on the force plate, and the first side plate is arranged opposite to the second side plate.

[0009] Furthermore, the connection portion is provided with a mounting hole corresponding to the force-applying member, the force-applying member is provided with a limiting hole corresponding to each of the mounting holes, and the caster further includes a limiting member, and the limiting member is provided in each of the mounting holes.

[0010] Furthermore, the limiting member includes a connecting rod, a braking end and an elastic member, the braking end is arranged at one end of the connecting rod close to the force applying member, and the elastic member is arranged between the braking end and the connecting part.

[0011] Furthermore, the elastic member is a spring.

[0012] Furthermore, the pressing plate is made of elastic material.

[0013] Furthermore, the connecting member is a bolt, and the caster further includes a first rubber pad and a second rubber pad, the first rubber pad is arranged between the limiting part of the bolt and the support frame, and the second rubber pad is arranged between the support frame and the gasket of the bolt.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] (1) In the present application, the force-applying member and the pressure plate are in contact, so that the pressure plate applies friction to the roller, which can decelerate the roller. This can achieve speed control and prevent injuries to the user.

[0016] (2) The present application uses a limiting member, which can, firstly, limit the force-applying member when it is in the initial state and the braking state; in particular, when the force-applying member is in the braking state, the roller can be braked to avoid the roller slipping due to failure to brake, damage to the workpiece, and even possible injury accidents. Secondly, it can be linked with the locking member to simplify the operation process, thereby bringing convenience to the user.

[0017] (3) When the roller of the present application encounters an uneven road surface, the first rubber pad and the second rubber pad act as a buffer to prevent the workpiece from being bumped or scratched. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a general assembly diagram of a caster provided in an embodiment of the utility model;

[0019] Figure 2 It is a vertical cross-sectional view of a caster provided in an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the support frame in the embodiment of the utility model;

[0021] Figure 4 This is a schematic structural diagram of a force-applying member in an embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the limiting member in the embodiment of the utility model.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Fixed plate; 2. Support frame; 21. Connecting part; 211. Long hole; 212. Mounting hole; 3. Connecting piece; 4. Roller; 5. Pin; 6. Force-applying piece; 61. Force-applying plate; 62. Limiting plate; 63. First side plate; 631. Limiting hole; 64. Second side plate; 7. Pressing plate; 8. Limiting piece; 81. Connecting rod; 82. Braking end; 83. Elastic piece; 9. First rubber pad; 10. Second rubber pad. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0028] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0029] Refer to the attached Figures 1 to 3As shown, the utility model provides a technical solution: a caster, the caster includes a fixed plate 1, a support frame 2, a connecting member 3, a roller 4, a pin 5, a force-applying member 6 and a pressure plate 7, the support frame 2 is connected to the fixed plate 1 through the connecting member 3, the roller 4 is rotatably arranged on the support frame 2, the support frame 2 has a connecting portion 21, the pin 5 is arranged on the connecting portion 21, the force-applying member 6 is rotatably arranged on the pin 5, the connecting portion 21 is provided with a long hole 211 for the force-applying member 6 to rotate, and the pressure plate 7 is arranged between the force-applying member 6 and the roller 4; when the force-applying member 6 applies force to the pressure plate 7, the pressure plate 7 applies friction force to the roller 4, so that the roller 4 slows down.

[0030] For example, in this embodiment, the connecting member 3 can be a rotating shaft, etc.; one end of the rotating shaft can be rotatably connected to the fixed plate 1, and the other end of the rotating shaft can be fixedly connected to the support frame 2; or one end of the rotating shaft can be fixedly connected to the fixed plate 1, and the other end of the rotating shaft can be rotatably connected to the support frame 2, so as to form a universal caster. The pressing plate 7 is made of elastic material; for example, the elastic material can be spring steel, aluminum or other elastic metals, etc., or can be an elastic plastic such as polyethylene or polyvinyl chloride.

[0031] According to this embodiment, when deceleration is required, the force-applying member 6 rotates around the pin 5, so that the force-applying member 6 pushes the pressure plate 7 to contact the roller 4, and the pressure plate 7 applies friction to the roller 4, so that the roller 4 can be decelerated. When the force-applying member 6 is not subjected to force, the pressure plate 7 drives the force-applying member 6 to reset through its own toughness.

[0032] In some embodiments, the force applying member 6 is a cam-type plate-shaped structure, so that the structure of the force applying member 6 can be relatively simple.

[0033] Refer to the attached Figures 1-2 As shown in Figure 4, in other embodiments, the force-applying member 6 includes a force-applying plate 61, a limiting plate 62, a first side plate 63 and a second side plate 64. The force-applying plate 61 is U-shaped, the limiting plate 62 is arranged at one end of the force-applying plate 61 close to the fixed plate 1, the first side plate 63 and the second side plate 64 are both arranged on the force-applying plate 61, and the first side plate 63 and the second side plate 64 are arranged opposite to each other.

[0034] Exemplarily, the first side plate 63 and the second side plate 64 are both rotatably connected to the pin shaft 5 .

[0035] According to this embodiment, the first side plate 63 and the second side plate 64 rotate around the pin 5, so that the force plate 61 rotates. After the force plate 61 is reset, the limit plate 62 contacts the support frame 2 to limit the position of the force plate 61, so as to prevent the pressure plate 7 from driving the force plate 61 to rotate excessively.

[0036] Refer to the attached Figures 1 to 3As shown, in order to brake the roller 4, the connecting part 21 is provided with a mounting hole 212 corresponding to the force-applying member 6, and the force-applying member 6 is provided with a limiting hole 631 corresponding to each mounting hole 212. The caster further includes a limiting member 8, and a limiting member 8 is provided in each mounting hole 212.

[0037] Exemplarily, when the force applying member 6 is a cam-type plate-like structure, the left side, the right side, or both the left and right sides of the cam-type plate-like structure may be provided with mounting holes 212; when the force applying member 6 is a force applying plate 61, a limiting plate 62, a first side plate 63, and a second side plate 64, at least one mounting hole 212 is provided on the first side plate 63 and / or the second side plate 64. The total number of limiting holes 631 is the same as the total number of mounting holes 212; that is, the limiting holes 631 correspond to the mounting holes 212 one by one.

[0038] In some embodiments, the limiting member 8 may be a latch or a locking bolt, etc.

[0039] For example, when the stopper 8 is a latch, the mounting hole 212 may be a through hole, the stopper 8 and the mounting hole 212 are clearance-matched, and the stopper hole 631 may be a through hole or a blind hole, etc. When the stopper 8 is a locking bolt, the mounting hole 212 may be a threaded hole, the stopper 8 and the mounting hole 212 are thread-matched, and the stopper hole 631 may be a through hole or a blind hole, etc.

[0040] According to this embodiment, when the stopper 8 is a latch, the stopper 8 can be directly pushed to be inserted into the stopper hole 631 to brake the roller 4. When the stopper 8 is a locking bolt, the stopper 8 can be rotated to move toward the stopper hole 631 and inserted into the stopper hole 631 to brake the roller 4.

[0041] Refer to the attached Figures 1-2 As shown in Figures 5 and 5 , in other embodiments, the limiting member 8 includes a connecting rod 81, a braking end 82 and an elastic member 83, the braking end 82 is arranged at one end of the connecting rod 81 close to the force-applying member 6, and the elastic member 83 is arranged between the braking end 82 and the connecting portion 21.

[0042] Exemplarily, the elastic member 83 is a spring or a rubber elastic pad.

[0043] According to this embodiment, during the rotation of the roller 4, the brake end 82 is abutted against the first side plate 63 and / or the second side plate 64 by the action of the elastic member 83, so that the brake end 82 can limit the force plate 61. When the limiting hole 631 corresponds to the mounting hole 212, the elastic member 83 extends and pushes the brake end 82 to insert into the limiting hole 631, and the force plate 61 can be limited to achieve the braking of the roller 4. When the force plate 61 is applied to the fixed plate 1, the brake end 82 is affected by the movement of the force plate 61 and disengages from the limiting hole 631, and the brake of the roller 4 can be released; during this period, the brake end 82 moves toward the connecting part 21, and the elastic member 83 is squeezed to prepare for the next braking. In this way, the limiting member 8 and the locking member can be linked, thereby simplifying the operation process, thereby bringing convenience to the user.

[0044] Refer to the attached Figure 2 As shown, in some embodiments, the connecting member 3 is a bolt, and the caster further includes a first rubber pad 9 and a second rubber pad 10, the first rubber pad 9 is arranged between the limiting portion of the bolt and the support frame 2, and the second rubber pad 10 is arranged between the support frame 2 and the gasket of the bolt.

[0045] Exemplarily, the fixing plate 1 and the supporting frame 2 are detachably connected by bolts, thereby forming a fixed caster.

[0046] According to this embodiment, when the roller 4 encounters an uneven road surface, the first rubber pad 9 and the second rubber pad 10 play a buffering role to avoid bumping or scratching the workpiece.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A caster, comprising a fixing plate (1), a support frame (2), a connecting member (3) and a roller (4), wherein the support frame (2) is connected to the fixing plate (1) via the connecting member (3), and the roller (4) is rotatably arranged on the support frame (2), characterized in that: The caster further comprises a pin shaft (5), a force-applying member (6) and a pressure plate (7); the support frame (2) has a connecting portion (21); the pin shaft (5) is arranged on the connecting portion (21); the force-applying member (6) is rotatably arranged on the pin shaft (5); the connecting portion (21) is provided with a long hole (211) for the force-applying member (6) to rotate; the pressure plate (7) is arranged between the force-applying member (6) and the roller (4); when the force-applying member (6) applies force to the pressure plate (7), the pressure plate (7) applies friction force to the roller (4), so that the roller (4) slows down.

2. A caster according to claim 1, characterized in that: The force-applying member (6) comprises a force-applying plate (61), a limiting plate (62), a first side plate (63) and a second side plate (64); the force-applying plate (61) is U-shaped; the limiting plate (62) is arranged at one end of the force-applying plate (61) close to the fixed plate (1); the first side plate (63) and the second side plate (64) are both arranged on the force-applying plate (61), and the first side plate (63) and the second side plate (64) are arranged opposite to each other.

3. A caster according to claim 1 or 2, characterized in that: The connecting portion (21) is provided with a mounting hole (212) corresponding to the force-applying member (6); the force-applying member (6) is provided with a limiting hole (631) corresponding to each mounting hole (212); the caster further comprises a limiting member (8); and each mounting hole (212) is provided with the limiting member (8).

4. A caster according to claim 3, characterized in that: The limiting member (8) comprises a connecting rod (81), a braking end (82) and an elastic member (83); the braking end (82) is arranged at one end of the connecting rod (81) close to the force applying member (6); and the elastic member (83) is arranged between the braking end (82) and the connecting portion (21).

5. A caster according to claim 4, characterized in that: The elastic member (83) is a spring.

6. The caster according to claim 1, characterized in that: The pressing plate (7) is made of elastic material.

7. The caster according to claim 1, characterized in that: The connecting member (3) is a bolt, and the caster further comprises a first rubber pad (9) and a second rubber pad (10), wherein the first rubber pad (9) is arranged between the limiting portion of the bolt and the support frame (2), and the second rubber pad (10) is arranged between the support frame (2) and the gasket of the bolt.

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