Universal trundle capable of automatically resetting after being emptied

Abstract

The utility model discloses a universal caster capable of automatically resetting after being emptied, which comprises a mounting plate, a universal caster and an automatic resetting device, the trundle frame is rotatably embedded into the mounting groove along the vertical axis; the reset mechanism comprises a sliding seat, a guide seat and an elastic piece, the sliding seat and the guide seat are arranged on the trundle frame and the mounting plate respectively, the elastic piece applies elastic acting force to the sliding seat to slide towards the guide seat, and the end face of the sliding seat abuts against the end face of the guide seat. The problems that when an operator pushes and pulls a cart, upward disturbance is large when the operator pushes and pulls the cart in use of an existing trundle, and when the operator moves on a bumpy terrain, the operator cannot detect the disturbance in time, so that the trundle is strenuous to use, inconvenient to use and even the cart is tipped over due to improper operation of the operator can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a universal caster that can automatically reset after being lifted off the ground. BACKGROUND

[0002] Casters are the main mobile control components of transport equipment such as trolleys, and their flexibility and load-carrying capacity are particularly important. Currently, common casters include directional wheels and universal wheels. The universal wheels can be adjusted in angle with the trolley floor to achieve multi-directional movement of the trolley. However, this also causes large disturbance in the direction of the operator when pushing or pulling the trolley, and the operator cannot detect this in time when moving on bumpy terrain, which leads to the problem of laborious, inconvenient use of the caster, or even tipping over of the trolley due to improper operation. SUMMARY

[0003] The utility model aims to solve the problem of the current caster, which is laborious, inconvenient to use, or even tips over due to improper operation by the operator when pushing or pulling the trolley, and provides a universal caster that can automatically reset after being lifted off the ground.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a universal caster that can automatically reset after being lifted off the ground, comprising:

[0005] A mounting plate having a mounting groove formed thereon;

[0006] A caster frame rotatably embedded in the mounting groove along a vertical axis;

[0007] A reset mechanism comprising a sliding seat and a guide seat disposed on the caster frame and the mounting plate, respectively, and an elastic member, wherein the elastic member applies an elastic force to the sliding seat to slide towards the guide seat, and the end face of the sliding seat abuts against the end face of the guide seat.

[0008] Further description of the above-mentioned technical scheme:

[0009] The mounting plate is provided with a waist-shaped hole at the corner thereof, which is connected to the trolley floor at the top by a fastener.

[0010] Further description of the above-mentioned technical scheme:

[0011] The mounting plate is provided with a guide enclosure on the outside of the caster frame, and a positioning seat on the inside of the caster frame, wherein the mounting groove is formed between the guide enclosure and the positioning seat, and the flange extending outside the guide enclosure abuts against the bottom outside of the top through-hole of the caster frame.

[0012] Further description of the above-mentioned technical scheme:

[0013] The wear-resistant pad is arranged between the guide fence, the positioning seat and the caster frame.

[0014] As a further description of the above technical solution:

[0015] The caster frame comprises a rotating disc and roller supports on both sides of the rotating disc, the rotating disc is embedded in the mounting groove, the holes in the roller supports are connected to the rollers through rotating shafts, and the two roller supports are integrally connected through the support plates on the top and form a U-shaped caster frame.

[0016] As a further description of the above technical solution:

[0017] The guide seat is positioned in the middle of the mounting plate, the horizontal section of the guide seat is in a waist shape, the side surface of the guide seat forms a flat positioning surface and a smooth arc-shaped turning surface which is connected to the positioning surface.

[0018] As a further description of the above technical solution:

[0019] The sliding seat is in a T-shaped structure, comprises an abutting block and a positioning block, the abutting block is abutted against the side surface of the guide seat, the positioning block is sleeved with the elastic member, and the elastic member is a spring which is positioned on the caster frame and the sliding seat.

[0020] As a further description of the above technical solution:

[0021] The vertical section of the abutting block is in a spindle shape, and the mounting plate is provided with an arc-shaped guide groove which is slidably connected to the side surface of the abutting block.

[0022] As a further description of the above technical solution:

[0023] The sliding seat is in a hollow structure, the inner side of the caster frame is provided with a guide rod, and the guide rod is slidably arranged in the sliding seat.

[0024] As a further description of the above technical solution:

[0025] The middle part of the guide rod is abutted against the lower end surface of the guide seat.

[0026] As described above, due to the adoption of the above technical solution, the present application has the following beneficial effects compared with the prior art:

[0027] The universal caster of the utility model realizes the structure pre-tightening after pushing the universal caster to the required direction, reduces the disturbance in the upward direction, and makes the caster operation more labor-saving and convenient; at the same time, when the universal caster is empty, the caster frame and the rollers thereon can be automatically rotated and reset to the initial direction, such as parallel to the length direction of the cart, thereby resetting the direction of the certain or certain casters on the cart, so that the operator pushes and the cart moves to produce a jam when the caster touches the ground again, to remind the operator of the terrain bumping situation and to make appropriate cart pushing and pulling operation adjustment, or the structure sound during the automatic direction resetting of the caster can be used to realize the reminding and warning functions. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 It is a general state diagram of the universal caster which is automatically reset after being empty.

[0030] Figure 2 It is a use state diagram of the universal caster which is automatically reset after being empty.

[0031] LEGEND:

[0032] 1, mounting plate; 11, waist-shaped hole; 12, guide enclosure; 13, positioning seat; 14, wear-resistant pad; 2, caster frame; 21, rotating disc; 22, roller support; 23, support plate; 3, sliding seat; 4, guide seat; 5, elastic piece; 6, guide rod. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the following will combine the drawings in the embodiments of the utility model, and clearly and completely describe the technical scheme in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0035] It should be noted that: similar reference numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of the embodiments of the application, it should be noted that the terms "upper", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0037] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0038] Embodiment one:

[0039] Please refer to Figures 1-2 The utility model provides a kind of technical scheme: a universal caster is automatically reset after emptying, comprising:

[0040] Mounting plate 1, installation slot is provided on it;

[0041] Caster frame 2, it is rotatably embedded in the installation slot along vertical axis;

[0042] Reset mechanism, including respectively being arranged on the caster frame 2, mounting plate 1 on slide 3 and guide base 4 and elastic piece 5, the elastic piece 5 is towards the guide base 4 sliding and is applied to the slide 3 elastic force, the end surface of the slide 3 is abutted on the end surface of the guide base 4.

[0043] The utility model discloses a universal trundle through setting reset mechanism between mounting plate and trundle frame to realize the structure pre -tightening of universal trundle after being pushed to the required direction, reduce the disturbance towards, make trundle operation more labor -saving, convenient, at the same time, when universal trundle is empty, through reset mechanism can make trundle frame and the automatic rotation reset of upper roller to initial direction, such as parallel to the length direction of trolley, thereby through the orientation reset of some or certain trundle on trolley, make trundle again when the operation personnel push, trolley moves and produce the jam, to remind the operator topography bumpy situation, and carry out proper trolley push -and -pull operation adjustment, also can through the structural response of trundle automatic orientation reset, to realize the reminding early warning function.

[0044] The waist-shaped hole 11 of the mounting plate 1 is arranged at the corner and is connected with the trolley bottom plate through fasteners. Thus, the influence of the manufacturing size deviation of the workpiece is reduced, and the assembly convenience is improved.

[0045] The mounting plate 1 is provided with a guide fence 12 outside the trundle frame 2 and a positioning seat 13 inside the trundle frame 2, and the mounting groove is formed between the guide fence 12 and the positioning seat 13. The flange extending outside the guide fence 12 is abutted outside the bottom of the through hole at the top of the trundle frame 2. Through the embedded rotary assembly structure of the trundle frame 2 and the mounting plate 1, the universal orientation adjustment performance of the universal trundle is improved.

[0046] The trundle frame 2 comprises an integral rotating disc 21 and roller supports 22 on both sides of the rotating disc 21. The rotating disc 21 is integrally embedded in the mounting groove. The holes in the roller supports 22 are connected with the rollers through rotating shafts. The two roller supports 22 are integrally connected through the support plate 23 at the top and form the U-shaped trundle frame 2, thereby improving the load capacity and structural strength of the trundle structure body.

[0047] The guide seat 4 is positioned in the middle of the mounting plate 1, and the horizontal section is in the shape of a waist. The side surface forms a flat positioning surface and a smooth arc-shaped turning surface abutting the positioning surface. When the trolley is stationary or moving, the sliding seat 3 is abutted on the positioning surface or the arc-shaped turning surface. In the latter state, the orientation of the trundle is mainly resisted by the rotational friction resistance of the ground to the trundle frame 2 and the roller, so as to offset the pushing force between the sliding seat 3 and the guide seat 4 and the rotational driving force between the mounting plate 1 and the trundle frame 2 applied by the elastic member 5.

[0048] The sliding seat 3 is in a T-shaped structure, which comprises an abutting block and a positioning block. The abutting block is abutted on the side surface of the guide seat 4. The positioning block is sleeved with the elastic member 5. The elastic member 5 is a spring with the ends positioned on the trundle frame 2 and the sliding seat 3, respectively. Thus, the transmission efficiency and stability in the reset mechanism are improved.

[0049] The slide block 3 has a hollow structure, and a guide rod 6 is provided on the inner side of the caster frame 2. The guide rod 6 slides through the slide block 3 to reduce the sliding resistance of the internal structure of the reset mechanism.

[0050] The working principle of the omnidirectional caster that automatically resets after being lifted off the ground in this embodiment includes: when the trolley is stationary or moving, the slide 3 abuts against the positioning surface or the arc-shaped steering surface on the side of the guide seat 4. In the latter state, i.e. Figure 2 In the shown usage state, the caster's orientation is mainly achieved by using the rotational frictional resistance exerted by the ground on the caster frame 2 and the rollers to counteract the thrust between the slide block 3 and the guide seat 4 applied by the elastic element 5, and the rotational driving force between the mounting plate 1 and the caster frame 2. When the operator pushes the trolley, the mounting plate 1 and the caster frame 2 rotate relative to each other to adjust the caster's orientation. The elastic thrust of the elastic element 5 on the slide block 3 ensures that it fully abuts against the surface of the guide seat 4, thereby achieving structural pre-tightening of the mounting plate 1 and the caster frame 2, and pre-tightening of the swivel caster's orientation. This reduces directional disturbances, making caster operation more effortless and convenient.

[0051] When the upper casters of the trolley are off the ground, the elastic element 5 causes the slide block 3 to slide along the guide rod 6 and rotate around the surface of the guide seat 4 until it abuts against the positioning surface of the guide seat 4. At this time, the caster frame 2 is also subjected to an elastic thrust in another direction, causing it to rotate relative to the mounting plate 1. The caster frame 2 and the rollers rotate to their initial state and orientation, as shown in the following details. Figure 1 As shown, by resetting the orientation of one or more casters on the trolley, the operator will experience a pause when pushing or moving the trolley again when the casters touch the ground, thus alerting the operator to the uneven terrain and allowing for appropriate pushing and pulling adjustments. The structural noise when the casters automatically reset their orientation can also serve as a warning.

[0052] Example 2:

[0053] Based on the above embodiment one, preferably, a wear-resistant pad layer 14 is provided between the guide enclosure 12, the positioning seat 13 and the caster frame 2. This design can reduce rotational wear between the swivel caster structures.

[0054] Example 3:

[0055] Based on the above embodiment one, preferably, the vertical cross-section of the abutment block is spindle-shaped, and the mounting plate 1 is provided with an arc-shaped guide groove that slides and engages with the side of the abutment block. When the caster frame 2 rotates relative to the mounting plate 1, the slide block 3 also rotates or slides relative to the guide seat 4 and the guide rod 6. The arc-shaped guide groove can guide the movement of the slide block 3, thereby improving structural stability.

[0056] Example 4:

[0057] On the basis of the above embodiment one, preferably, the middle part of the guide rod 6 abuts against the lower end surface of the guide base 4. Thus, the design can reinforce the rotary connection structure of the mounting plate 1 and the caster frame 2, so that the guide rod 6 can support them during rotation and use, and the steering activity of the casters is more stable.

[0058] In summary, due to the adoption of the above technical scheme, the universal caster capable of automatically resetting after being lifted in the embodiment has the following beneficial effects compared with the prior art:

[0059] The universal caster of the utility model realizes the structure pre-tightening of the universal caster after being pushed to the required direction, reduces the disturbance in the upward direction, and makes the caster operation more labor-saving and convenient. At the same time, when the universal caster is lifted, the caster frame and the rollers thereon can be automatically rotated and reset to the initial direction, such as parallel to the length direction of the cart, so that the orientation of one or more casters on the cart is reset, the operation personnel is reminded of the terrain bumping situation, and the appropriate cart pushing and pulling operation adjustment is performed, or the reminding and warning function is realized through the structure response during the automatic orientation reset of the caster.

[0060] The above is only the preferred specific implementation mode of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A self-resetting caster after being lifted, characterized in that, The utility model relates to a kind of casters, including: Mounting plate is provided with mounting slot on it; Caster frame is rotatably embedded in the mounting slot provided along vertical axis; Reset mechanism includes slide and guide seat and elastic element respectively arranged on the caster frame and mounting plate, the elastic element exerts elastic force on the slide towards the guide seat, and the end surface of the slide is abutted on the end surface of the guide seat.

2. The self-resetting caster according to claim 1, wherein, The waist-shaped hole of the mounting plate is arranged at the corner of the mounting plate and is connected with the top of the stroller bottom plate by fastener.

3. The self-resetting caster according to claim 1, wherein, The mounting plate is provided with guide fence outside the caster frame, and is provided with positioning seat inside the caster frame, the mounting slot is formed between the guide fence and the positioning seat, and the flange extended outside the guide fence is abutted on the bottom outside of the top through hole of the caster frame.

4. The self-resetting caster according to claim 3, wherein, Wear-resistant pad is arranged between the guide fence, the positioning seat and the caster frame.

5. The self-resetting caster according to claim 1, wherein, The caster frame includes an integral rotating disc and roller supports on both sides of the rotating disc, the rotating disc is embedded in the mounting slot, and the holes on the roller supports are connected with rollers through rotating shafts, the two roller supports are integrally connected through the support plate on the top and form the U-shaped caster frame.

6. The self-resetting caster according to claim 1, wherein, The guide seat is positioned in the middle of the mounting plate, and the horizontal section is in the shape of a waist, and the side surface forms a flat positioning surface and a smooth arc-shaped turning surface.

7. The self-resetting caster according to claim 1, wherein, The slide is in T-shaped structure, including abutment block and positioning block, the abutment block is abutted on the side surface of the guide seat, the positioning block is sleeved with the elastic element, and the elastic element is spring with end positioned on the caster frame and the slide.

8. The self-resetting caster according to claim 7, wherein, The vertical section of the abutment block is in spindle shape, and the mounting plate is provided with arc-shaped guide groove slidably connected with the side surface of the abutment block.

9. The self-resetting caster according to claim 1, wherein, The slide is in hollow structure, the inside of the caster frame is provided with guide rod, and the guide rod is slidably arranged on the slide.

10. The self-resetting caster according to claim 9, wherein, The middle of the guide rod is abutted on the lower end surface of the guide seat.

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