Trundle with adjustable height

Abstract

The utility model relates to the technical field of trundles, in particular to a height-adjustable trundle which comprises a mounting base, horizontal guide grooves are formed in the left side and the right side of the mounting base, a pair of sliding arms is rotatably mounted at the bottom end of the mounting base, and a wheel is mounted between the two sliding arms. The lifting platform overcomes the defects in the prior art, the lifting platform and the bottom of assembly equipment can be installed in a butt joint mode through the assembly hole in the top of the lifting platform, when the wheel passes through a severe environment or a road surface with poor trafficability, the wheel can be kept to move in a mode of being attached to the ground through the damping assembly, and the double-thread screw can be rotated according to actual requirements. The transmission nut can be driven by rotation of the double-thread screw to move in the axis direction of the double-thread screw, and in the moving process of the transmission nut, the lifting table can be pushed through the supporting arm to be used for height adjustment in the vertical direction.

Description

Technical Field

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

[0002] Casters, also known as wheels, pulleys, rollers or wheels, are a general term, mainly including movable casters, fixed casters and movable casters with brakes. Movable casters, which are what we usually call universal wheels, have the structural feature of being able to rotate 360 ​​degrees, so that equipment or objects can be moved in any direction at will. Fixed casters, also known as fixed casters, have no rotating structure, so they cannot rotate and can only move in a straight line.

[0003] Casters are widely used in various equipment and tools, such as trolleys, medical equipment, industrial machinery, etc. In the design of trolleys, two fixed wheels are usually used in the front, and two movable universal wheels are used in the back near the push handle to provide stable propulsion and flexible steering functions;

[0004] Although existing casters are widely used in various equipment and tools, they still have some shortcomings in actual use. During use, especially in harsh environments or with poor trafficability, the bottom of the equipment is prone to collision and scratching with the ground, which may shorten the service life of the caster. Therefore, a height-adjustable caster is proposed. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a caster with adjustable height, which overcomes the deficiencies of the prior art and solves the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a height-adjustable caster, comprising a mounting base, horizontal guide grooves are provided on both sides of the mounting base, a pair of sliding arms are rotatably mounted on the bottom end of the mounting base, a wheel is arranged between the two sliding arms, a shock-absorbing assembly is provided on the inner wall of the mounting base, and a lifting mechanism is provided on the top end of the mounting base;

[0007] The lifting mechanism includes a connecting pad, a pair of limit frames fixedly installed on the upper surface of the connecting pad, a lifting platform sleeved and installed between the two limit frames, and a regulating component configured and connected between the two limit frames. The upper surface of the lifting platform is provided with an assembly hole.

[0008] The mounting base and the connecting pad can be fastened together with the aid of docking bolts. The assembly holes on the top of the lifting platform can be docked with the bottom of the assembly equipment for installation. When the wheels pass through harsh environments or roads with poor passability, the shock-absorbing components can be used to keep the wheels moving in close contact with the ground, and the stud screw can be rotated according to actual needs. The rotation of the stud screw can drive the transmission nut to move along the axial direction of the stud screw, and during the movement of the transmission nut, the lifting platform can be pushed with the aid of the support arm for height adjustment in the up and down directions.

[0009] As a preferred technical solution of the utility model, a docking hole is formed on the top of the mounting base, a docking bolt is provided on the bottom of the connecting pad, and the connecting pad is connected to the docking hole through the docking bolt.

[0010] As a preferred technical solution of the utility model, the shock absorbing assembly includes a spring shock absorber with one end fixed to the inner wall of the mounting base, a transmission rod fixedly connected to the end of the spring shock absorber away from the mounting base, and a linkage arm rotatably connected to the left and right ends of the transmission rod, the left and right ends of the transmission rod are respectively slidably connected to the horizontal guide groove, and the linkage arm is rotatably connected to the sliding arm at one end away from the transmission rod.

[0011] The spring shock absorber can be connected to the sliding arm through the transmission rod and the linkage arm, and can exert a force on the wheel so that the wheel can effectively move in accordance with the road surface when passing over rough terrain, thereby reducing the vibration of the equipment.

[0012] As a preferred technical solution of the utility model, vertical guide grooves are provided on both sides of the limit frame, and guide sliders are fixedly installed on both sides of the lifting platform, and the structural dimensions of the guide sliders are adapted to the vertical guide grooves.

[0013] The lifting platform can be slidably connected with the vertical guide groove by means of a guide slider, so that the height can be adjusted up and down along the direction of the vertical guide groove.

[0014] As a preferred technical solution of the utility model, the regulating component includes a double-headed screw rotatably connected between two limit frames, a transmission nut symmetrically installed on the double-headed screw and a support arm rotatably connected to the top of the transmission nut, and the support arm is rotatably connected to the bottom of the lifting platform at one end away from the transmission nut.

[0015] By rotating the double-headed screw, the two transmission nuts can be synchronously driven to move in opposite directions. When the transmission nuts move, the support arm can be driven to push the bottom of the lifting platform, thereby realizing the up and down regulation of the lifting platform.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The assembly hole on the top of the lifting platform can be used for docking and installation with the bottom of the assembly equipment. When the wheels pass through harsh environments or roads with poor passability, the shock-absorbing components can keep the wheels moving in close contact with the ground, and the double-headed screw can be rotated according to actual needs. The rotation of the double-headed screw can drive the transmission nut to move along the axial direction of the double-headed screw, and during the movement of the transmission nut, the lifting platform can be pushed with the help of the support arm to adjust the height in the up and down directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0019] Figure 2 It is a partial three-dimensional cross-sectional schematic diagram of the utility model;

[0020] Figure 3 It is a cross-sectional schematic diagram of the limiting frame of the utility model.

[0021] In the figure: 1, mounting base; 101, horizontal guide groove; 2, sliding arm; 3, wheel; 4, linkage arm; 401, transmission rod; 5, spring shock absorber; 6, connecting pad; 601, docking bolt; 602, limit frame; 603, vertical guide groove; 604, lifting platform; 605, assembly hole; 606, double-headed screw; 607, transmission nut; 608, support arm; 609, guide slider. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 A height-adjustable caster includes a mounting base 1, horizontal guide grooves 101 are provided on both sides of the mounting base 1, a pair of sliding arms 2 are rotatably mounted on the bottom end of the mounting base 1, a wheel 3 is arranged between the two sliding arms 2, a shock-absorbing component is provided on the inner wall of the mounting base 1, and a lifting mechanism is provided on the top of the mounting base 1;

[0024] The lifting mechanism includes a connecting pad 6, a pair of limit frames 602 fixedly installed on the upper surface of the connecting pad 6, a lifting platform 604 sleeved between the two limit frames 602, and a regulating component configured and connected between the two limit frames 602. An assembly hole 605 is opened on the upper surface of the lifting platform 604. The mounting base 1 and the connecting pad 6 can be fastened with the help of docking bolts 601. The assembly hole 605 on the top of the lifting platform 604 can be docked and installed with the bottom of the assembly equipment. When the wheel 3 passes through a harsh environment or a road with poor passability, the shock absorbing component can be used to keep the wheel 3 moving in contact with the ground, and the stud screw 606 can be rotated according to actual needs. The rotation of the stud screw 606 can drive the transmission nut 607 to move along the axial direction of the stud screw 606, and the support arm 608 can be used to push the lifting platform 604 to adjust the height in the up and down directions during the movement of the transmission nut 607.

[0025] Specifically, a docking hole is formed on the top of the mounting base 1 , and a docking bolt 601 is provided on the bottom of the connecting pad 6 , and the connecting pad 6 is connected to the docking hole through the docking bolt 601 .

[0026] Specifically, the shock absorbing assembly includes a spring shock absorber 5 with one end fixed to the inner wall of the mounting base 1, a transmission rod 401 fixedly connected to the end of the spring shock absorber 5 away from the mounting base 1, and a linkage arm 4 rotatably connected to the left and right ends of the transmission rod 401. The left and right ends of the transmission rod 401 are respectively slidably connected to the horizontal guide groove 101, and the linkage arm 4 is rotatably connected to the sliding arm 2 at one end away from the transmission rod 401. The spring shock absorber 5 can be connected to the sliding arm 2 through the transmission rod 401 and the linkage arm 4, and can apply a force to the wheel 3, so that the wheel 3 can effectively move in accordance with the road surface when passing over rough ground, thereby reducing the vibration of the equipment.

[0027] Specifically, vertical guide grooves 603 are provided on both sides of the limit frame 602, and guide sliders 609 are fixedly installed on both sides of the lifting platform 604. The guide sliders 609 are adapted to the structural dimensions of the vertical guide grooves 603. The lifting platform 604 can be slidably connected to the vertical guide grooves 603 with the help of the guide sliders 609, so that the height can be adjusted up and down along the direction of the vertical guide grooves 603.

[0028] Specifically, the regulating component includes a double-headed screw 606 rotatably connected between the two limit frames 602, a transmission nut 607 symmetrically installed on the double-headed screw 606, and a support arm 608 rotatably connected to the top of the transmission nut 607. The support arm 608 is rotatably connected to the bottom of the lifting platform 604 at one end away from the transmission nut 607. By rotating the double-headed screw 606, the two transmission nuts 607 can be synchronously driven to move in opposite directions. When the transmission nut 607 moves, it can drive the support arm 608 to push the bottom of the lifting platform 604, thereby realizing the up and down regulation of the lifting platform 604.

[0029] Working principle: First, the mounting base 1 and the connecting pad 6 can be fastened together with the aid of the docking bolts 601, and the assembly hole 605 on the top of the lifting platform 604 can be docked and installed with the bottom of the assembly equipment. When the wheel 3 passes through a harsh environment or a road with poor passability, the shock absorbing assembly can be used to keep the wheel 3 moving in close contact with the ground, and the double-headed screw 606 can be rotated according to actual needs. The rotation of the double-headed screw 606 can drive the transmission nut 607 to move along the axial direction of the double-headed screw 606, and during the movement of the transmission nut 607, the lifting platform 604 can be pushed with the aid of the support arm 608 for height adjustment in the up and down directions.

[0030] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A height-adjustable caster, comprising a mounting base (1), characterized in that: The installation base (1) is provided with horizontal guide grooves (101) on both left and right sides; a pair of sliding arms (2) are rotatably mounted on the bottom end of the installation base (1); a wheel (3) is arranged and mounted between the two sliding arms (2); a shock absorbing assembly is provided on the inner wall of the installation base (1); and a lifting mechanism is provided on the top end of the installation base (1); The lifting mechanism comprises a connecting pad (6), a pair of limiting frames (602) fixedly mounted on the upper surface of the connecting pad (6), a lifting platform (604) sleeved and mounted between the two limiting frames (602), and a regulating component arranged and connected between the two limiting frames (602).

2. The height-adjustable caster according to claim 1, characterized in that: A docking hole is formed on the top of the mounting base (1), a docking bolt (601) is provided on the bottom of the connecting pad (6), and the connecting pad (6) is connected to the docking hole via the docking bolt (601).

3. The height-adjustable caster according to claim 1, characterized in that: The shock absorbing assembly comprises a spring shock absorber (5) with one end fixed to the inner wall of the mounting base (1), a transmission rod (401) fixedly connected to the end of the spring shock absorber (5) away from the mounting base (1), and a linkage arm (4) rotatably connected to the left and right ends of the transmission rod (401).

4. The height-adjustable caster according to claim 3, characterized in that: The left and right ends of the transmission rod (401) are respectively slidably connected to the horizontal guide groove (101), and the end of the linkage arm (4) away from the transmission rod (401) is rotationally connected to the sliding arm (2).

5. The height-adjustable caster according to claim 1, characterized in that: The left and right sides of the limit frame (602) are both provided with vertical guide grooves (603), and the left and right sides of the lifting platform (604) are both fixedly installed with guide sliders (609), and the structural dimensions of the guide sliders (609) are compatible with the vertical guide grooves (603).

6. The height-adjustable caster according to claim 1, characterized in that: The regulating assembly comprises a double-headed screw (606) rotatably connected between two limit frames (602), a transmission nut (607) symmetrically mounted on the double-headed screw (606), and a support arm (608) rotatably connected to the top of the transmission nut (607).

7. The height-adjustable caster according to claim 6, characterized in that: One end of the support arm (608) away from the transmission nut (607) is rotatably connected to the bottom of the lifting platform (604).

8. The height-adjustable caster according to claim 1, characterized in that: The upper surface of the lifting platform (604) is provided with an assembly hole (605).

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