A vibration-damping caster

Abstract

The present invention relates to the technical field of casters, and specifically to a vibration-damping caster, comprising a caster bracket and a wheel mounted on the lower part of the caster bracket, the caster bracket comprising a suspension, a mounting frame and at least one spring, the suspension comprising two inner side plates and a first baffle connecting the two inner side plates; the spring is located between the first baffle and the second baffle, and the rear end of the spring abuts against the first baffle, and the front end of the spring abuts against the second baffle, the mounting frame comprises two outer side plates and a second baffle connecting the two outer side plates; the present application provides a vibration-damping caster, which utilizes a vibration-damping mechanism based on the lever principle formed by the mounting frame, the suspension and the spring, has a good vibration-damping effect, has smaller requirements and losses on the spring, and has a more stable and durable overall structure, which is beneficial to increasing the service life of the caster.

Description

Technical Field

[0001] The invention relates to the technical field of casters, in particular to a vibration-damping caster. Background Art

[0002] Casters are a common mechanical hardware accessory, which is widely used in the bottom of load-bearing equipment (such as furniture, carts, mechanical processing equipment, medical equipment) to facilitate the movement of load-bearing equipment. When the casters pass through some uneven ground, they will produce large vibrations, which will not only affect the load-bearing equipment and the user experience, but also affect the life of the casters. At present, some existing casters also have vibration reduction functions, but generally they are directly loaded and vibration-reduced through springs. This vibration reduction method has a poor vibration reduction effect, and because the spring directly bears the load, the requirements for the spring are high, and the loss of the spring is also large, and the vibration reduction function is easy to fail. Summary of the invention

[0003] In order to overcome the defects existing in the prior art, the task of the present invention is to provide a vibration-damping caster, which utilizes a vibration-damping mechanism based on the lever principle formed by the cooperation of a mounting frame, a suspension and a spring. The vibration-damping effect is good, and the requirements and losses on the spring are smaller. The overall structure is more stable and durable, which is beneficial to increasing the service life of the caster.

[0004] The task of the present invention is achieved through the following technical solutions:

[0005] A vibration-damping caster comprises a caster bracket and a wheel mounted on the lower part of the caster bracket, the caster bracket comprises a suspension, a mounting frame and at least one horizontally arranged spring, the suspension comprises two vertically and parallel inner side plates and a first baffle connecting the upper parts of the two inner side plates, the lower parts of the two inner side plates are respectively hinged to the wheel axles on both sides of the wheel; the mounting frame comprises two vertically and parallel outer side plates and a second baffle connecting the upper parts of the two outer side plates, the lower part of each outer side plate is hinged to the outer side of its corresponding inner side plate; the spring is located between the first baffle and the second baffle, and the rear end of the spring abuts against the first baffle, and the front end of the spring abuts against the second baffle.

[0006] Preferably, a limit block is provided on the outer side of the inner plate, the hinge between the inner plate and the wheel is a first hinge point, the hinge between the outer plate and the inner plate is a second hinge point, and the limit block is located between the first hinge point and the outer plate.

[0007] Preferably, the two outer panels are each provided with a through hole, and a reinforcing rod is inserted into the two through holes to connect the two outer panels together.

[0008] Preferably, the reinforcing rod is located at the rear side of the first baffle, so as to limit the movement of the first baffle.

[0009] Preferably, a turntable assembly capable of horizontal rotation is movably mounted on the upper part of the mounting frame, the turntable assembly comprising an upper wave plate, a lower wave plate, a plurality of first balls, a plurality of second balls and a fastener, an annular connecting portion is provided on the caster bracket, the annular connecting portion is located between the upper wave plate and the lower wave plate, the lower surface of the upper wave plate and the upper surface of the annular connecting portion are respectively provided with a first annular groove and a second annular groove relative to each other, the lower surface of the annular connecting portion and the upper surface of the lower wave plate are respectively provided with a third annular groove and a fourth annular groove relative to each other, the cross-sections of the first annular groove, the second annular groove, the third annular groove and the fourth annular groove are all concave arc structures, the first ball is arranged between the first annular groove and the second annular groove, the second ball is arranged between the third annular groove and the fourth annular groove, the caster bracket and the turntable assembly are rotatably connected via the first ball and the second ball, and the fastener vertically passes through the through holes in the centers of the upper wave plate and the lower wave plate in sequence and fastens the upper wave plate and the lower wave plate together.

[0010] Preferably, the perforated edge of the upper wave plate and the perforated edge of the lower wave plate are tightly attached together under the action of the fastener, and the perforated inner side wall of the upper wave plate and the perforated inner side wall of the lower wave plate are tightly attached to the outer side wall of the fastener.

[0011] Preferably, the second annular groove and the third annular groove are staggered in the radial direction of the annular connecting portion, and the second annular groove is located on the outer side of the third annular groove in the radial direction.

[0012] Preferably, the upper wave disc is provided with a connection hole for connecting with a carrying device, or the fastener is provided with an insertion rod or a screw rod integrally formed therewith, and the insertion rod and the thread are used for connecting with the carrying device.

[0013] Preferably, a retaining spring is further provided on the upper portion of the insertion rod.

[0014] Preferably, a mounting plate is fixedly connected to the upper portion of the mounting frame, the mounting plate is horizontally fixed to the upper portion of the mounting frame and is integrally formed with the mounting frame, and the mounting plate is used to be connected to a carrying device.

[0015] Compared with the prior art, the vibration-damping caster of the present invention has the following advantages: the wheel will bounce upward when traveling on uneven ground, thereby driving the suspension to deflect counterclockwise around the second hinge point B, and then compressing the spring through the first baffle on the suspension, so that the spring absorbs and filters the bounce of the wheel to achieve vibration reduction of the caster. Compared with the traditional spring direct load-bearing vibration reduction structure, the vibration-damping caster of the present invention uses a lever principle vibration reduction mechanism formed by the cooperation of the mounting frame, the suspension and the spring, which has a better vibration reduction effect. Moreover, the use of the lever principle can effectively reduce the load on the spring, has lower requirements on the spring, and can reduce the loss of the spring, thereby making the vibration reduction mechanism in the present application more stable and durable, and having a longer service life. Moreover, the horizontal arrangement of the spring in this embodiment can reduce the height of the overall caster and save space, making the cooperation between the suspension and the mounting frame more compact, and the structural design is ingenious.

[0016] The concept, specific structure and effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the vibration-damping caster in Example 1;

[0018] Figure 2 is a schematic diagram of the structure of the vibration-damping caster in Example 1 with the turntable assembly hidden;

[0019] Figure 3 yes Figure 1 The structural breakdown diagram of

[0020] Figure 4 is a cross-sectional view of the vibration-damping caster in Example 1;

[0021] Figure 5 It is a schematic diagram of the structure of the vibration-damping caster in Example 2.

[0022] Among them: caster bracket 1, annular connecting part 11, wheel 2, axle 21, suspension 3, inner plate 31, first baffle 32, limit block 33, mounting frame 4, outer plate 41, second baffle 42, reinforcing rod 43, spring 5, mounting assembly 6, turntable assembly 61, upper wave plate 62, lower wave plate 63, first ball 64, second ball 65, fastener 66, first annular groove 671, second annular groove 672, third annular groove 673, fourth annular groove 674. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0024] It should be noted that when an element is referred to as being "connected" to another element, it may be directly connected to the other element or indirectly connected through an intermediate element. In addition, the terms "upper", "lower", "left", "right", "front", "rear", "lateral", "vertical" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0025] Embodiment 1:

[0026] like Figure 1-4 As shown, the vibration-damping caster comprises a caster bracket 1 and a wheel 2 mounted at the bottom of the caster bracket 1. The caster bracket 1 comprises a suspension 3, a mounting bracket 4 and at least one spring 5 arranged horizontally. The suspension 3 comprises two inner side plates 31 and a first baffle 32 connecting the upper parts of the two inner side plates 31. The two inner side plates 31 are arranged vertically and parallel to each other. The lower parts of the two inner side plates 31 are respectively hinged to the wheel axles 21 on both sides of the wheel 2, which is the first hinge point A. The mounting bracket 4 comprises two outer side plates 41 and a second baffle 42 connecting the upper parts of the two outer side plates 41. The two outer side plates 41 are arranged vertically and parallel to each other. The lower parts of the two outer side plates 41 are respectively hinged to the outer sides of the inner side plates 31 on the corresponding sides, which is the second hinge point B. The two springs 5 ​​are arranged in parallel and are both located between the first baffle 32 and the second baffle 42, and the rear end of the spring 5 abuts against the first baffle 32, and the front end of the spring 5 abuts against the second baffle 42.

[0027] When the wheel 2 travels on an uneven ground, it will bounce upward, thereby driving the suspension 3 to deflect counterclockwise around the second hinge point B, and then compressing the spring 5 through the first baffle 32 on the suspension 3, so that the spring 5 can absorb and filter the bounce of the wheel 2 to achieve vibration reduction of the caster. Compared with the traditional spring direct load-bearing vibration reduction structure, the vibration reduction caster of the present invention uses the mounting frame 4, the suspension 3 and the spring 5 to form a vibration reduction mechanism based on the lever principle, which has better vibration reduction effect. Moreover, the lever principle can effectively reduce the load of the spring 5, the requirement for the spring 5 is relatively small, and the loss of the spring 5 can be reduced, so that the vibration reduction mechanism in the present application is more stable and durable, and has a longer service life. In addition, the spring 5 in the present embodiment is arranged horizontally, which can reduce the overall height of the caster and save space, making the cooperation between the suspension 3 and the mounting frame 4 more compact and the structural design ingenious.

[0028] A limit block 33 is provided on the outer side of the inner plate 31, and the limit block 33 is located between the first hinge point A and the outer plate 41. When the force of the downward pressing mounting frame 4 exceeds the elastic force bearing range of the spring 5, the spring 5 is compressed to the extreme, and the mounting frame 4 continues to move downward and drives the suspension 3 to continue to rotate counterclockwise. The rotation of the suspension 3 drives the limit block 33 located thereon to press against the side of the outer plate 41 of the mounting frame 4, thereby limiting the position of the suspension 3 and the mounting frame 4, preventing the mounting frame 4 from continuing to move downward, and also preventing the suspension 3 from continuing to rotate, which can enhance the structural stability of the entire caster bracket.

[0029] The two outer plates 41 are each provided with a through hole 44, and a reinforcing rod 43 is inserted into the two through holes 44 and connects the two outer plates 41 together. The provision of the reinforcing rod 43 can further enhance the overall strength of the mounting frame 4, so that the mounting frame 4 has a better load-bearing effect. The reinforcing rod 43 is located at the rear side of the first baffle plate 32, so that the movement of the first baffle plate 32 can be limited, further enhancing the structural stability of the entire caster bracket, and facilitating loading and unloading.

[0030] A turntable assembly 61 capable of horizontal rotation is movably installed on the upper part of the mounting frame, and the turntable assembly 61 includes an upper wave plate 62, a lower wave plate 63, a plurality of first balls 64, a plurality of second balls 65 and a fastener 66. An annular connecting portion 11 is provided on the caster bracket, and the annular connecting portion 11 is located between the upper wave plate 62 and the lower wave plate 63. The lower surface of the upper wave plate 62 and the upper surface of the annular connecting portion 11 are respectively provided with a first annular groove 671 and a second annular groove 672, and the lower surface of the annular connecting portion 11 and the upper surface of the lower wave plate 63 are respectively provided with a third annular groove 671 and a third annular groove 672. 73 and the fourth annular groove 674, the cross-sections of the first annular groove 671, the second annular groove 672, the third annular groove 673 and the fourth annular groove 674 are all concave arc structures, the first ball 64 is arranged between the first annular groove 671 and the second annular groove 672, the second ball 65 is arranged between the third annular groove 673 and the fourth annular groove 674, the caster bracket and the turntable assembly are rotatably connected through the first ball 64 and the second ball 65, and the fastener 66 vertically passes through the through holes in the center of the upper wave disc 62 and the lower wave disc 63 in sequence and fastens the upper wave disc 62 and the lower wave disc 63 together. The perforated edges of the upper wave disc 62 and the perforated edges of the lower wave disc 63 are tightly attached together under the action of the fastener 66, and the inner side wall of the perforated holes of the upper wave disc 62 and the inner side wall of the perforated holes of the lower wave disc 63 are both tightly attached to the outer side wall of the fastener 66. The second annular groove 672 and the third annular groove 673 are staggered in the radial direction of the annular connecting portion 11, and the second annular groove 672 is located on the outer side of the third annular groove 673 in the radial direction. Figure 1 As shown, the upper wave plate 62 is provided with a connection hole for connecting with a carrying device.

[0031] Embodiment 2:

[0032] like Figure 4Another embodiment of the present application is shown, in which a mounting plate is fixedly connected to the upper portion of the mounting frame, the mounting plate is horizontally fixed to the upper portion of the mounting frame and is integrally formed with the mounting frame, and the mounting plate is used to connect to the supporting device.

[0033] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. A vibration-damping caster, characterized in that: The invention comprises a caster bracket and a wheel installed at the lower part of the caster bracket, the caster bracket comprises a suspension, a mounting frame and at least one spring arranged horizontally, the suspension comprises two inner side plates arranged vertically and in parallel and a first baffle connecting the upper parts of the two inner side plates, the lower parts of the two inner side plates are respectively hinged to the wheel axles on both sides of the wheel, which is the first hinge point; the mounting frame comprises two outer side plates arranged vertically and in parallel and a second baffle connecting the upper parts of the two outer side plates, the lower part of each outer side plate is hinged to the outer side of the corresponding inner side plate, which is the second hinge point; the spring is located between the first baffle and the second baffle, and the spring The rear end of the frame abuts against the first baffle, and the front end of the spring abuts against the second baffle; the mounting frame, the suspension and the spring cooperate to form a lever principle, and when the wheel travels on an uneven ground, it will jump upward, thereby driving the suspension to deflect counterclockwise around the second hinge point, and then compressing the spring through the first baffle on the suspension; a limit block is provided on the outer side of the inner plate, and the limit block is located between the first hinge point and the outer plate. When the force of the mounting frame pressed down exceeds the elastic force bearing range of the spring, the spring is compressed to the extreme, and the mounting frame continues to move downward and drives the suspension to continue to rotate counterclockwise, and the rotation of the suspension drives the limit block located thereon. The cam is pressed against the side edges of the outer plates of the mounting frame, thereby limiting the positions of the suspension and the mounting frame; the two outer plates are each provided with a through hole, a reinforcing rod is inserted into the two through holes and connects the two outer plates together, the reinforcing rod is located on the rear side of the first baffle, thereby being able to limit the movement of the first baffle; a turntable assembly capable of horizontal rotation is movably installed on the upper part of the mounting frame, the turntable assembly comprises an upper wave plate, a lower wave plate, a plurality of first ball bearings, a plurality of second ball bearings and a fastener, an annular connecting portion is provided on the caster bracket, the annular connecting portion is located between the upper wave plate and the lower wave plate, and the lower part of the upper wave plate The surface and the upper surface of the annular connecting part are respectively provided with a first annular groove and a second annular groove, the lower surface of the annular connecting part and the upper surface of the lower wave disc are respectively provided with a third annular groove and a fourth annular groove, the cross-sections of the first annular groove, the second annular groove, the third annular groove and the fourth annular groove are all concave arc structures, the first ball is arranged between the first annular groove and the second annular groove, the second ball is arranged between the third annular groove and the fourth annular groove, the caster bracket and the turntable assembly are rotatably connected through the first ball and the second ball, and the fastener passes vertically through the through holes in the centers of the upper wave disc and the lower wave disc in turn and fastens the upper wave disc and the lower wave disc together.

2. The vibration-damping caster according to claim 1, characterized in that: The perforated edge of the upper wave plate and the perforated edge of the lower wave plate are tightly attached together under the action of the fastener, and the perforated inner side wall of the upper wave plate and the perforated inner side wall of the lower wave plate are both tightly attached to the outer side wall of the fastener.

3. The vibration-damping caster according to claim 1, characterized in that: The second annular groove and the third annular groove are staggered in the radial direction of the annular connecting portion, and the second annular groove is located outside the third annular groove in the radial direction.

4. The vibration-damping caster according to claim 1, characterized in that: The upper wave disc is provided with a connection hole for connecting with a carrying device, or the fastener is provided with an insertion rod or a screw rod integrally formed therewith, and the insertion rod and the thread are used for connecting with the carrying device.

5. The vibration-damping caster according to claim 4, characterized in that: A retaining spring is also provided on the upper part of the insertion rod.

6. The vibration-damping caster according to claim 1, characterized in that: A mounting plate is fixedly connected to the upper portion of the mounting frame. The mounting plate is horizontally fixed to the upper portion of the mounting frame and is integrally formed with the mounting frame. The mounting plate is used to be connected to a carrying device.

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