CN214492392U

CN214492392U - Chassis shock attenuation universal wheel

Info

Publication number: CN214492392U
Application number: CN202120680791.2U
Authority: CN
Inventors: 李金波; 周乐俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-10-26
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses a chassis damping universal wheel, which comprises a universal wheel component, a damping swing arm and a damping component, wherein the universal wheel component is rotationally connected with one end of the damping swing arm, and the damping component comprises a damping support, an installation support, a hinge mechanism and an elastic mechanism; the hinge mechanism and the elastic mechanism are connected between the shock absorption support and the mounting support at intervals along the vertical direction, and two ends of the elastic mechanism are respectively abutted against the shock absorption support and the mounting support, so that the shock absorption support is hinged with the mounting support and is also elastically connected through the elastic mechanism; the damping support is fixedly connected with the other end of the damping swing arm, and the mounting support is provided with a connecting mechanism which can be connected with the chassis. Through setting up the hinge mechanism, realize fastening and rotation between shock-absorbing support and the erection support, for shock-absorbing support provides a rotational degree of freedom, can be when the universal wheel passes through unsmooth road surface, fixed damping swing arm and universal wheel subassembly are beated from top to bottom on the shock-absorbing support, cushion through elastic mechanism simultaneously to realize the damping effect.

Description

Chassis shock attenuation universal wheel

Technical Field

The utility model relates to a transportation equipment technical field specifically is a chassis shock attenuation universal wheel.

Background

The universal wheel, i.e., the so-called movable caster, is a wheel that is connected to a lower portion of a transportation device or a robot and can freely change its direction, and is roughly classified into a fixed caster and a rotating caster. The caster is an important component of a plurality of transporting devices or robots, not only is a walking part but also has a damping function, and particularly plays a key role in damping the operation quality of a transporting device or a robot and the noise of an operation environment in logistics places with uneven ground conditions. The existing transporting device or robot usually adopts a steel ball disc mechanism for rotation of the trundle, the running steel ball of the trundle is easy to damage when bearing materials, the load bearing of the trundle is not facilitated, and the stability of left-right swinging is poor.

SUMMERY OF THE UTILITY MODEL

To one or more among the above-mentioned prior art not enough, the utility model provides a chassis shock attenuation universal wheel, not only the shock attenuation is effectual, still has higher flexibility and stability that turns to.

In order to achieve the purpose, the utility model provides a chassis damping universal wheel, which comprises a universal wheel component, a damping swing arm and a damping component, wherein the universal wheel component is rotationally connected with one end of the damping swing arm;

the hinge mechanism and the elastic mechanism are connected between the shock absorption support and the mounting support at intervals in the vertical direction, and two ends of the elastic mechanism are respectively abutted against the shock absorption support and the mounting support, so that the shock absorption support and the mounting support are hinged through the hinge mechanism and are also elastically connected through the elastic mechanism;

the damping support is fixedly connected with the other end of the damping swing arm, and the mounting support is provided with a connecting mechanism which can be connected with the chassis.

In one embodiment, the damping assembly further comprises an adjusting screw, the adjusting screw is screwed on the damping support or the mounting support, and the adjusting screw abuts against the end of the elastic mechanism to adjust the damping coefficient of the elastic mechanism.

In one embodiment, the damping swing arm is of a V-shaped structure, the universal wheel assembly is rotatably connected to the V-shaped bottom end of the damping swing arm, the number of the damping assemblies is two, and the two damping assemblies are symmetrically connected to the two V-shaped top ends of the damping swing arm.

In one embodiment, the end part of the damping swing arm is provided with an upward concave groove, and the universal wheel assembly is rotatably connected in the groove.

In one embodiment, the elastic mechanism comprises a pressure spring, a pressure spring sleeve and a pressure spring gasket, and one of the shock absorption support and the mounting support is provided with an embedded groove corresponding to the pressure spring sleeve;

the compression spring sleeve is embedded into and connected with the embedded groove, one end of the compression spring is arranged in the compression spring sleeve, and the other end of the compression spring is abutted against the other one of the mounting supports through the compression spring gasket and the damping support.

In one embodiment, the hinge mechanism is a shoulder screw connected between the shock mount and the mounting mount.

In one embodiment, the universal wheel assembly comprises a wheel frame and a wheel body, the wheel frame is rotatably connected to the end part of the damping swing arm through a first bearing, and the wheel body is rotatably connected to the wheel frame through a second bearing.

In one embodiment, the number of the wheel bodies is two, and the two wheel bodies are symmetrically and rotatably connected to two sides of the wheel frame.

In one embodiment, the first bearing is a double row angular contact bearing.

Compared with the prior art, the chassis damping universal wheel has the following beneficial technical effects:

1. the hinge mechanism is arranged to realize the fastening and the rotation between the damping support and the mounting support, provide a rotational degree of freedom for the damping support, and enable the damping swing arm and the universal wheel component fixed on the damping support to jump up and down when the universal wheel passes through a rugged road surface, and simultaneously buffer through the elastic mechanism, thereby realizing the damping effect;

2. through setting up the wheel body of two mutual symmetries, increased the wheel face width of universal wheel for the walking of universal wheel or the process of turning to is more stable, can also control two wheel body differential motions simultaneously and realize turning to, thereby reduces the steering movement power of universal wheel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of an explosion structure of a chassis damping universal wheel in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a damping swing arm in an embodiment of the present invention;

FIG. 3 is an exploded view of a shock absorbing assembly according to an embodiment of the present invention;

fig. 4 is an exploded schematic view of the universal wheel assembly according to the embodiment of the present invention.

The reference numbers illustrate:

the damping swing arm 10, a second mounting hole 101, a positioning auxiliary groove 102 and a groove 103;

the shock absorption support 20, a second hinge hole 201 and a first mounting hole 202;

the mounting support 30 and the first hinge hole 301;

a hinge mechanism 40;

a pressure spring 501, a pressure spring sleeve 502, a pressure spring gasket 503 and an adjusting screw 504;

swing arm fastening screws 60;

a wheel frame 701 and a wheel body 702;

the bearing comprises a first bearing 80, a first bearing inner ring limit baffle 801, a first bearing outer ring baffle 802, a first bearing inner ring fastening screw 803 and a first bearing outer ring fastening screw 804;

second bearing 90, second bearing inner race baffle 901, second bearing outer race baffle 902, second bearing inner race fastening screw 903, second bearing outer race fastening screw 904, and decorative cover 905.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Fig. 1-4 show a chassis damping universal wheel disclosed in this embodiment, which specifically includes a universal wheel assembly, a damping swing arm 10 and a damping assembly, wherein the universal wheel assembly is rotatably connected to one end of the damping swing arm 10. Wherein, damper assembly includes shock mount 20, erection support 30, hinge mechanism 40 and elastic mechanism, and shock mount 20 fixed connection damps the other end of swing arm 10. Hinge mechanism 40, elastic mechanism connect between shock mount 20 and erection support 30 along vertical interval, and the both ends of elastic mechanism butt shock mount 20 and erection support 30 respectively to when making shock mount 20 articulated through hinge mechanism 40 with erection support 30, still pass through elastic mechanism elastic connection. Through setting up the hinge mechanism 40, realize fastening and rotation between shock mount 20 and erection support 30, for shock mount 20 provides a rotational degree of freedom, can be when the universal wheel passes through unsmooth road surface, the shock attenuation swing arm 10 of fixing on shock mount 20 beats with the universal wheel subassembly from top to bottom, cushions through elastic mechanism simultaneously to realize the shock attenuation effect.

Specifically, the hinge mechanism 40 is a shoulder screw connected between the shock mount 20 and the mounting mount 30, and the mounting mount 30 is a U-shaped base structure, which specifically includes a bottom plate and two end plates connected to the bottom plate, and the bottom plate and the end plates can be fixedly connected by bolts or welding or other fasteners. First hinge hole 301 has been seted up to the bottom of end plate, is provided with the second hinge hole 201 that corresponds with first hinge hole 301 on shock mount 20, realizes articulatedly through the cooperation of shoulder screw with first hinge hole 301, second hinge hole 201 between shock mount 20 and the erection support 30. The elastic mechanism comprises a pressure spring 501, a pressure spring sleeve 502 and a pressure spring gasket 503, and one of the shock absorption support 20 and the installation support 30 is provided with an embedded groove corresponding to the pressure spring sleeve 502; the compression spring sleeve 502 is embedded into the connection embedded groove, one end of the compression spring 501 is arranged in the compression spring sleeve 502, and the other end of the compression spring 501 is abutted against the other mounting support 30 through the compression spring gasket 503 and the shock absorption support 20. In this embodiment, the embedded groove is disposed on the shock absorbing support 20, the elastic mechanism is located above the hinge mechanism, the embedded groove is located above the second hinge hole 201, one end of the pressure spring 501 is located in the pressure spring sleeve 502, and the other end of the pressure spring abuts against the upper portion of the upper bottom plate of the mounting support 30.

In a preferred embodiment, the damping assembly further includes an adjusting screw 504, the adjusting screw 504 is screwed on the damping support 20 or the mounting support 30, and the adjusting screw 504 abuts against an end of the elastic mechanism, that is, the adjusting screw 504 abuts against the compression spring sleeve 502 or the compression spring washer 503, and the relative distance between the damping support 20 and the mounting support 30 can be adjusted by rotating the adjusting screw 504, so as to adjust the length of the compression spring 501, thereby adjusting the damping coefficient of the elastic mechanism to adapt to different weights. For example, the adjusting screw 504 is a 3-M8 damping adjusting screw with a pitch of 1.5MM, the spring coefficient of the compression spring 501 is 261.5N/MM, and the spring force increased by each rotation of the adjusting screw 504 is F-KX-261.5-1.5-392.25N, which is about 40kg, and is sufficient to satisfy the damping of 40kg or more.

It should be noted that although the mounting bracket 30 is illustrated as a U-shaped bracket structure and the shock absorbing bracket 20 is illustrated as a block structure in the present embodiment. However, in the implementation, shock mount 20 may be configured as a U-shaped structure, mount 30 may be configured as a block structure, or other implementation structures with similar functions. In addition, although the elastic mechanism is shown above the hinge mechanism 40, the hinge mechanism 40 may be disposed above the elastic mechanism in a specific implementation.

In this embodiment, the damping support 20 is fixedly connected with the damping swing arm 10 through a bolt. In the specific implementation process, two first mounting holes 202 are arranged on the shock absorption support 20 at intervals along the vertical direction, a second mounting hole 101 corresponding to the first mounting hole 202 is arranged at the end of the shock absorption swing arm 10, and finally the shock absorption support 20 is fixedly connected with the shock absorption swing arm 10 through the matching of the swing arm fastening screw 60 with the first mounting hole 202 and the second mounting hole 101. Preferably, the end of the shock absorbing swing arm 10 is provided with a positioning auxiliary groove 102 capable of supporting the shock absorbing support 20, the second mounting hole 101 is located on the groove wall of the positioning auxiliary groove 102, during the installation process, the shock absorbing support 20 is firstly placed on the positioning auxiliary groove 102, so as to facilitate the alignment of the first mounting hole 202 and the second mounting hole 101, and then the swing arm fastening screw 60 is installed after the alignment. Through the structural design, the installation process between the shock absorption support 20 and the shock absorption swing arm 10 can be effectively simplified.

In this embodiment, the mounting support 30 is provided with a connecting mechanism capable of connecting to a chassis, so that the universal wheels can be mounted on the chassis of the transportation device or the robot through the connecting mechanism. The specific implementation mode of the connecting mechanism can be a bolt connection mode or a connection mode of a buckle connection and a bolt connection matching mode.

As a preferred embodiment, the damping swing arm 10 is a V-shaped structure, the universal wheel assembly is rotatably connected to the V-shaped bottom end of the damping swing arm 10, the number of the damping assemblies is two, and the two damping assemblies are symmetrically connected to the two V-shaped top ends of the damping swing arm 10. Further preferably, the end of the shock absorbing swing arm 10 is provided with an upwardly concave groove 103, and the universal wheel assembly is rotatably connected in the groove 103. Connect universal wheel subassembly and chassis through two damper assembly, not only can further promote its shock attenuation effect, still make the universal wheel have higher flexibility and stability that turns to.

In this embodiment, the universal wheel assembly includes a wheel frame 701 and a wheel body 702, the wheel frame 701 is rotatably connected to the end of the damping swing arm 10 through a first bearing 80, and the wheel body 702 is rotatably connected to the wheel frame 701 through a second bearing 90. The first bearing 80 is a double-row angular contact bearing, the second bearing 90 is a deep groove ball bearing, the wheel body 702 is a PU wheel, and the Shore A hardness of the PU wheel is 70. Preferably, the number of wheel body 702 is two, and two wheel body 702 symmetries are rotated and are connected in the both sides of wheel carrier 701, through setting up two mutual symmetrical wheel bodies 702, has increased the wheel face width of universal wheel for the walking or the process of turning to of universal wheel is more stable, can also control two wheel body 702 differential motions simultaneously and realize turning to, thereby reduces the steering movement power of universal wheel.

In the specific implementation process, the universal wheel assembly further comprises a first bearing inner ring limit baffle 801, a first bearing outer ring baffle 802, a first bearing inner ring fastening screw 803, a first bearing outer ring fastening screw 804, a second bearing inner ring baffle 901, a second bearing outer ring baffle 902, a second bearing inner ring fastening screw 903, a second bearing outer ring fastening screw 904 and a decorative cover 905. After the second bearing 90 is mounted on the two wheel bodies 702, the second bearing 90 is rotatably connected to the wheel carrier 701, the inner ring of the second bearing 90 is fastened through a second bearing inner ring baffle 901 and a second bearing inner ring fastening screw 903, the outer ring is fixed through a second bearing outer ring baffle 902 and a second bearing outer ring fastening screw 904, and finally the decorative cover 905 is fixed through K-5904 sealant. Wheel 702, which is fixed by a separate second bearing 90, can provide both synchronous and differential motion. After the wheel body 702 is mounted on the wheel carrier 701 through the second bearing 90, the wheel carrier 701 is provided with a first bearing outer ring baffle 802, the pressed-in first bearing 80 is fixed through a first bearing inner ring limit baffle 801, and is fastened through a first bearing inner ring fastening screw 803, and the whole is fastened to the damping swing arm 10 through a first bearing outer ring fastening screw 804. The first bearing 80 is a double-row angular contact bearing, so that the universal wheel assembly has rotational freedom and can bear axial and radial forces from the universal wheel assembly. Thus ensuring the stability and rotation of the universal wheel, and the two wheel bodies 702 work independently without mutual interference and provide differential speed and synchronization. Compared with a single wheel, the wheel surface is wide in width, more contacts with the ground during rotary motion and linear motion, the larger the static friction coefficient is, the more stable the balance is, and the better the obstacle crossing performance is. And when the rotary motion of the device is performed, the outer ring rotates, the inner ring does not rotate, the accurate control can be realized more in controlling the motion steering, the contact area of the device can be reduced, the rolling friction coefficient is reduced, the driving torque is reduced, and the device realizes the more accurate control of the motion steering and the more easy stop of the stop command generated by the rotation.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A chassis damping universal wheel is characterized by comprising a universal wheel component, a damping swing arm and a damping component, wherein the universal wheel component is rotatably connected to one end of the damping swing arm;

2. The chassis damping universal wheel according to claim 1, wherein the damping assembly further comprises an adjusting screw, the adjusting screw is screwed on the damping support or the mounting support, and the adjusting screw abuts against an end of the elastic mechanism for adjusting a damping coefficient of the elastic mechanism.

3. The chassis damping universal wheel as claimed in claim 1, wherein the damping swing arm is a V-shaped structure, the universal wheel assembly is rotatably connected to the V-shaped bottom end of the damping swing arm, the number of the damping assemblies is two, and two damping assemblies are symmetrically connected to the two V-shaped top ends of the damping swing arm.

4. The chassis damping universal wheel as claimed in claim 3, wherein the damping swing arm is provided with an upwardly concave groove at the end thereof, and the universal wheel assembly is rotatably connected in the groove.

5. The chassis damping universal wheel according to any one of claims 1 to 4, wherein the elastic mechanism comprises a compression spring, a compression spring sleeve and a compression spring gasket, and one of the damping support and the mounting support is provided with an embedded groove corresponding to the compression spring sleeve;

6. The chassis damping universal wheel according to any one of claims 1 to 4, characterized in that the hinge mechanism is a shoulder screw connected between the damping mount and the mounting mount.

7. The chassis damping universal wheel as claimed in any one of claims 1 to 4, wherein the universal wheel assembly comprises a wheel carrier and a wheel body, the wheel carrier is rotatably connected to the end of the damping swing arm through a first bearing, and the wheel body is rotatably connected to the wheel carrier through a second bearing.

8. The chassis damping universal wheel as claimed in claim 7, wherein the number of the wheel bodies is two, and the two wheel bodies are symmetrically and rotatably connected to two sides of the wheel frame.

9. The chassis damping castor of claim 7, wherein said first bearing is a double row angular contact bearing.