Universal trundle capable of automatically resetting after being emptied

Abstract

The invention discloses a universal trundle capable of automatically resetting after being emptied, which comprises a mounting plate, a plurality of supporting plates and a plurality of supporting plates, 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 existing trundle is used, when an operator pushes and pulls a cart, upward disturbance is large, 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 and 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 invention relates to the technical field of casters, in particular to a universal caster which can automatically reset itself after being lifted off. Background Art

[0002] Casters are the main mobile control components of transport equipment such as carts, so their flexibility, load-bearing capacity and other parameters are particularly important. At present, common casters include fixed wheels and universal wheels. Among them, universal wheels can achieve multi-directional movement of the cart by adjusting the angle between them and the bottom plate of the cart. At the same time, there are also problems such as large upward disturbance when the operator pushes and pulls the cart, and when moving on bumpy terrain, the operator cannot detect it in time, resulting in improper operation, which makes the casters difficult to use, inconvenient, and even overturning of the cart. Summary of the invention

[0003] The purpose of the present invention is to provide a universal caster which automatically resets after being vacated in order to solve the problems that when using existing casters, the operator causes large upward disturbance when pushing or pulling the cart, and the operator cannot detect it in time when moving on bumpy terrain, resulting in improper operation of the caster, which makes the use of the caster difficult and inconvenient, and even the cart overturns.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a universal caster that automatically resets after being vacated, comprising:

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

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

[0007] The reset mechanism comprises a slide seat and a guide seat respectively arranged on the caster frame and the mounting plate, and an elastic member, wherein the elastic member applies an elastic force to the slide seat to slide toward the guide seat, and the end face of the slide seat abuts against the end face of the guide seat.

[0008] As a further description of the above technical solution:

[0009] The corners of the mounting plate are provided with waist-shaped holes which are connected with the top cart bottom plate through fasteners.

[0010] As a further description of the above technical solution:

[0011] The mounting plate is provided with a guide enclosure on the outer side of the caster frame, and a positioning seat is provided on the inner side of the caster frame, 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 outer side of the through hole at the top of the caster frame.

[0012] As a further description of the above technical solution:

[0013] A wear-resistant cushion layer is arranged between the guide enclosure, the positioning seat and the caster frame.

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

[0015] The caster frame includes an integrally arranged rotating disk and roller brackets on both sides of the rotating disk, the rotating disk is entirely embedded in the mounting groove, the holes on the roller brackets are connected to the rollers via a rotating shaft, and the two roller brackets are integrally connected via a top support plate to form a U-shaped caster frame.

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

[0017] The guide seat is positioned at the middle of the mounting plate, and its horizontal cross section is waist-shaped, and its side surface forms a straight positioning surface and an arc-shaped turning surface smoothly docking with the positioning surface.

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

[0019] The slide seat is in a T-shaped structure and includes an abutment block and a positioning block. The abutment block abuts against the side of the guide seat. The positioning block is sleeved with the elastic member, which is a spring whose ends are respectively positioned on the caster frame and the slide seat.

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

[0021] The vertical cross section of the abutment block is spindle-shaped, and the mounting plate is provided with an arc-shaped guide groove that is slidably docked with the side surface of the abutment block.

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

[0023] The slide seat is a hollow structure, a guide rod is arranged on the inner side of the caster frame, and the guide rod is slidably penetrated on the slide seat.

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

[0025] The middle portion of the guide rod abuts against the lower end surface of the guide seat.

[0026] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0027] The universal caster of the present invention is provided with a reset mechanism between the mounting plate and the caster frame to achieve structural pre-tightening after the universal caster is pushed to the desired direction, thereby reducing the disturbance in the direction, making the caster operation more labor-saving and convenient; at the same time, when the universal caster is vacated, the caster frame and the roller thereon can be automatically rotated and reset to the initial direction, such as parallel to the length direction of the cart, through the reset mechanism, thereby resetting the direction of one or some casters on the cart, so that when the caster touches the ground again, the operator pushes and the movement of the cart is jammed, so as to remind the operator of the bumpy terrain and make appropriate adjustments to the push-pull operation of the cart. The reminder and warning function can also be achieved through the structural sound when the caster automatically resets in the direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a general state diagram of a universal caster that automatically resets after being vacated.

[0030] Figure 2 The present invention is a diagram showing the use status of a universal caster which automatically resets itself after being vacated.

[0031] Legend:

[0032] 1. Mounting plate; 11. Waist-shaped hole; 12. Guide enclosure; 13. Positioning seat; 14. Wear-resistant pad; 2. Caster frame; 21. Turntable; 22. Roller bracket; 23. Support plate; 3. Sliding seat; 4. Guide seat; 5. Elastic part; 6. Guide rod. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention 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 present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Embodiment 1:

[0039] See also Figure 1-2 The present invention provides a technical solution: a universal caster that automatically resets after being vacated, comprising:

[0040] A mounting plate 1, on which a mounting groove is provided;

[0041] A caster frame 2, which is rotatably embedded in the mounting groove along a vertical axis;

[0042] The reset mechanism includes a slide seat 3 and a guide seat 4 and an elastic member 5 respectively arranged on the caster frame 2 and the mounting plate 1. The elastic member 5 applies an elastic force to the slide seat 3 to slide toward the guide seat 4, and the end face of the slide seat 3 abuts against the end face of the guide seat 4.

[0043] The universal caster of the present invention is provided with a reset mechanism between the mounting plate and the caster frame to achieve structural pre-tightening after the universal caster is pushed to the desired direction, thereby reducing the disturbance in the direction, making the caster operation more labor-saving and convenient; at the same time, when the universal caster is vacated, the caster frame and the roller thereon can be automatically rotated and reset to the initial direction, such as parallel to the length direction of the cart, through the reset mechanism, thereby resetting the direction of one or some casters on the cart, so that when the caster touches the ground again, the operator pushes and the movement of the cart is jammed, so as to remind the operator of the bumpy terrain and make appropriate adjustments to the push-pull operation of the cart. The reminder and warning function can also be achieved through the structural sound when the caster automatically resets in the direction.

[0044] The corners of the mounting plate 1 are provided with waist-shaped holes 11 that are connected to the top trolley bottom plate through fasteners, thereby reducing the impact of workpiece manufacturing dimensional deviation and improving assembly convenience.

[0045] The mounting plate 1 is provided with a guide enclosure 12 on the outside of the caster frame 2, and a positioning seat 13 is provided on the inside of the caster frame 2. The mounting groove is formed between the guide enclosure 12 and the positioning seat 13, and the flange extending from the outside of the guide enclosure 12 abuts against the bottom outside of the through hole at the top of the caster frame 2. The embedded rotating assembly structure of the caster frame 2 and the mounting plate 1 improves the universal orientation adjustment performance of the universal caster.

[0046] The caster frame 2 includes an integrally arranged rotating disk 21 and roller brackets 22 on both sides of the rotating disk 21. The rotating disk 21 is embedded in the mounting groove as a whole. The holes on the roller brackets 22 are connected to the rollers through a rotating shaft. The two roller brackets 22 are integrally connected through a top support plate 23 to form a U-shaped caster frame 2, thereby improving the load-bearing capacity and structural strength of the caster structure body.

[0047] The guide seat 4 is positioned in the middle of the mounting plate 1, and its horizontal cross section is waist-shaped, and its side surface forms a straight positioning surface and an arc-shaped steering surface smoothly butting against the positioning surface. When the cart is stationary or moving, the slide seat 3 abuts against the positioning surface or the arc-shaped steering surface. In the latter state, the orientation of the caster is mainly offset by the rotational friction resistance applied by the ground to the caster frame 2 and the roller to offset the thrust between the slide seat 3 and the guide seat 4 and the rotational driving force between the mounting plate 1 and the caster frame 2 applied by the elastic member 5.

[0048] The slide seat 3 is a T-shaped structure, which includes an abutment block and a positioning block. The abutment block abuts against the side of the guide seat 4. The positioning block is sleeved with the elastic member 5, which is a spring whose ends are respectively positioned on the caster frame 2 and the slide seat 3. This improves the transmission efficiency and transmission stability in the reset mechanism.

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

[0050] The working principle of the universal caster that automatically resets after being vacated in this embodiment includes: when the cart is stationary or moving, the slide seat 3 abuts against the positioning surface or arc-shaped turning surface of the side of the guide seat 4. In the latter state, that is, Figure 2 In the use state shown, the orientation of the caster is mainly offset by the rotational friction resistance applied by the ground to the caster frame 2 and the roller to offset the thrust between the slide seat 3 and the guide seat 4 and the rotational driving force between the mounting plate 1 and the caster frame 2 applied by the elastic member 5. When the operator pushes the cart, the mounting plate 1 and the caster frame 2 rotate relative to each other to adjust the direction of the caster, and the elastic thrust of the elastic member 5 on the slide seat 3 is fully abutted against the surface of the guide seat 4 to achieve structural pre-tightening of the mounting plate 1 and the caster frame 2, pre-tightening of the universal caster, reducing disturbance in the direction, and making the caster operation more labor-saving and convenient.

[0051] When part of the casters on the cart are vacant, the elastic action of the elastic member 5 causes the slide seat 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, and the caster frame 2 and the roller rotate to the initial state and direction, as shown in the specific Figure 1 As shown, by resetting the direction of one or some of the casters on the cart, the operator pushes and the cart moves at a lag when the casters touch the ground again, so as to remind the operator of the bumpy terrain and make appropriate adjustments to the push and pull operations of the cart. The warning function can also be achieved through the sound of the structure when the casters are automatically reset.

[0052] Embodiment 2:

[0053] On the basis of the above-mentioned embodiment 1, preferably, a wear-resistant pad layer 14 is arranged between the guide enclosure 12, the positioning seat 13 and the caster frame 2. This design can reduce the rotation wear between the universal caster structures.

[0054] Embodiment three:

[0055] On the basis of the above-mentioned embodiment 1, 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 is slidably connected to the side of the abutment block. When the caster frame 2 and the mounting plate 1 rotate relative to each other, the slide seat 3 also rotates or slides relative to the guide seat 4 and the guide rod 6, and the movement of the slide seat 3 can be guided by the arc-shaped guide groove, thereby improving the structural stability.

[0056] Embodiment 4:

[0057] On the basis of the above-mentioned embodiment 1, preferably, the middle part of the guide rod 6 abuts against the lower end surface of the guide seat 4. This design can reinforce the rotation connection structure of the mounting plate 1 and the caster frame 2, so that when the two are rotated and used, the guide rod 6 can support them, making the caster steering activity more stable.

[0058] In summary, due to the adoption of the above technical solution, the universal caster that automatically resets after being vacated in this embodiment has the following beneficial effects compared with the prior art:

[0059] The universal caster of the present invention is provided with a reset mechanism between the mounting plate and the caster frame to achieve structural pre-tightening after the universal caster is pushed to the desired direction, thereby reducing the disturbance in the direction, making the caster operation more labor-saving and convenient; at the same time, when the universal caster is vacated, the caster frame and the roller thereon can be automatically rotated and reset to the initial direction, such as parallel to the length direction of the cart, through the reset mechanism, thereby resetting the direction of one or some casters on the cart, so that when the caster touches the ground again, the operator pushes and the movement of the cart is jammed, so as to remind the operator of the bumpy terrain and make appropriate adjustments to the push-pull operation of the cart. The reminder and warning function can also be achieved through the structural sound when the caster automatically resets in the direction.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A universal caster that automatically resets after being vacated, characterized in that: include: A mounting plate having a mounting groove thereon; A caster frame, which is rotatably embedded in the mounting groove along a vertical axis; The reset mechanism comprises a slide seat and a guide seat respectively arranged on the caster frame and the mounting plate, and an elastic member, wherein the elastic member applies an elastic force to the slide seat to slide toward the guide seat, and the end face of the slide seat abuts against the end face of the guide seat.

2. The universal caster that automatically resets after being vacated according to claim 1, characterized in that: The corners of the mounting plate are provided with waist-shaped holes which are connected with the top cart bottom plate through fasteners.

3. The universal caster that automatically resets after being vacated according to claim 1, characterized in that: The mounting plate is provided with a guide enclosure on the outer side of the caster frame, and a positioning seat is provided on the inner side of the caster frame, 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 outer side of the through hole at the top of the caster frame.

4. The universal caster that automatically resets after being vacated according to claim 3, characterized in that: A wear-resistant cushion layer is arranged between the guide enclosure, the positioning seat and the caster frame.

5. The universal caster that automatically resets after being vacated according to claim 1, characterized in that: The caster frame includes an integrally arranged rotating disk and roller brackets on both sides of the rotating disk, the rotating disk is entirely embedded in the mounting groove, the holes on the roller brackets are connected to the rollers via a rotating shaft, and the two roller brackets are integrally connected via a top support plate to form a U-shaped caster frame.

6. The universal caster that automatically resets after being vacated according to claim 1, characterized in that: The guide seat is positioned at the middle of the mounting plate, and its horizontal cross section is waist-shaped, and its side surface forms a straight positioning surface and an arc-shaped turning surface smoothly docking with the positioning surface.

7. The universal caster that automatically resets after being lifted off according to claim 1, characterized in that: The slide seat is in a T-shaped structure and includes an abutment block and a positioning block. The abutment block abuts against the side of the guide seat. The positioning block is sleeved with the elastic member, which is a spring whose ends are respectively positioned on the caster frame and the slide seat.

8. The universal caster that automatically resets after being lifted off according to claim 7, characterized in that: The vertical cross section of the abutment block is spindle-shaped, and the mounting plate is provided with an arc-shaped guide groove that is slidably docked with the side surface of the abutment block.

9. The universal caster that automatically resets after being lifted off according to claim 1, characterized in that: The slide seat is a hollow structure, a guide rod is arranged on the inner side of the caster frame, and the guide rod is slidably penetrated on the slide seat.

10. The universal caster that automatically resets after being lifted off according to claim 9, characterized in that: The middle portion of the guide rod abuts against the lower end surface of the guide seat.

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