Double-spring shock-proof trundle

Abstract

The utility model relates to a double-spring shock-proof trundle. Comprising a trundle support, wheels and a shock-proof assembly, the trundle support is of a U-shaped structure which is formed by connecting a mounting plate and two sets of side plates and provided with a downward opening, and the two sets of side plates are connected through a supporting base; the shock-proof assembly comprises an elastic component and a transmission component, the elastic component is movably connected with the supporting seat, the middle part of the transmission component is rotatably connected to the lower end parts of the two groups of side plates, one end of the transmission component is connected with the elastic component, and the other end of the transmission component is rotatably connected with the wheel. The two groups of mutually symmetrical elastic components are arranged on the trundle, and the lower end of the side plate is used as a rotating center, so that when the trundle passes through a bumpy road section, the spring can be compressed through the elastic components, and the damping effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of caster technology, specifically relating to a double-spring shock-absorbing caster. Background Technology

[0002] Casters include swivel casters and fixed casters. Swivel casters, also known as universal casters, allow 360-degree rotation; fixed casters, also called directional casters, have no rotating mechanism and cannot turn. A typical handcart has two fixed casters and two swivel casters, used together to facilitate movement. However, when a handcart is in use, its weight is entirely concentrated on the casters. When the goods on the handcart are heavy, the casters bear significant force. When traversing bumpy roads, because the casters lack shock absorption, they are prone to deformation and damage from hard impacts. This can also affect the goods on the handcart; for fragile items, it can even lead to damage during transport. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a double-spring shock-absorbing caster. By providing two sets of mutually symmetrical elastic components on the caster, with the lower end of the side plate as the rotation center, when the wheel passes through a bumpy road section, the elastic components can compress the spring, thereby playing a shock-absorbing role.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A double-spring shock-absorbing caster includes a caster bracket, a wheel, and a shock-absorbing assembly. The caster bracket is a downward-opening U-shaped structure formed by a mounting plate and two sets of side plates connected together, with the two sets of side plates connected by a support base. The shock-absorbing assembly includes an elastic member and a transmission member. The elastic member is movably connected to the support base, and the middle part of the transmission member is rotatably connected to the lower ends of the two sets of side plates. One end of the transmission member is connected to the elastic member, and the other end of the transmission member is rotatably connected to the wheel.

[0006] The transmission component includes a rotating plate and a connecting column. The rotating plate comprises two sets, the middle portions of which are rotatably connected to the lower ends of two sets of side plates. The front ends of the two sets of rotating plates are connected via the connecting column, and the rear ends of the two sets of rotating plates are respectively connected to the axle of the wheel. The support base has a through hole running vertically through the shaft. The elastic component includes a compression column, a spring, a limiting plate, and a nut. The lower end of the compression column has a collar that passes downward through the through hole and fits onto the connecting column. The upper end of the compression column is threaded into the nut. The spring is fitted onto the outside of the compression column, with its lower end abutting against the upper surface of the support base and its upper end abutting against the lower surface of the nut via the limiting plate. The elastic component comprises two sets, which are symmetrical about the wheel as the center of symmetry.

[0007] The double-spring shock-absorbing caster with this structure has a rotating plate rotatably connected to the lower end of the side plates in the middle. The rotation center is located at the lower ends of the two sets of side plates on the caster bracket. A collar at the lower end of a compression column is fitted onto the connecting column at the front end of the rotating plate. The wheel at the rear end of the rotating plate rests against the ground. When the wheel travels over bumpy surfaces, it moves upwards, causing the connecting column to move downwards, thus pulling the compression column down. To achieve shock absorption, a spring is fitted around the compression column, with the lower end of the spring abutting against the support. On the seat, the upper end of the spring is limited by a limiting plate. Therefore, when the wheel is subjected to the upward force of bumps, the connecting column will pull the collar, causing the limiting plate to compress the spring downward, thereby playing a shock absorption role. The nut locked at the upper end of the compression column can adjust the compression force of the spring, thereby changing the shock absorption effect. Since the compression column does not move up and down in a straight line during the rotation of the rotating plate, the through hole is an elongated hole with the length of the rotating plate as the direction. Therefore, the compression column will not be obstructed by the through hole during its up and down movement.

[0008] The two sets of elastic components symmetrical about the wheel form a double-spring structure, which can withstand stronger forces than a single spring and has better stability due to its left-right symmetry.

[0009] Furthermore, the rotating plate is provided with a slot, and the slot is provided with a plurality of upwardly recessed engaging parts at equal intervals along the length direction of the rotating plate. The lower end of the side plate is provided with a locking post, which is detachably connected to the engaging part.

[0010] Compared with the prior art, the advantages of this utility model are as follows: the front and rear ends of the rotating plate are connected to the connecting column and the wheel respectively, with the middle part of the rotating plate as the rotation center. When the wheel passes over a bumpy road, it will move upward, which will cause the connecting column to move downward and pull the compression column downward. The limiting plate above the compression column is compressed downward, thus achieving the shock absorption effect under the action of the spring force. The nut can be adjusted to change the spring compression force to achieve different rebound force requirements. At the same time, the two sets of elastic components with the wheel as the center of symmetry can achieve a more balanced effect, and can withstand stronger forces, making the caster more adaptable. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a top perspective view of the present invention;

[0013] Figure 2 This is a bottom-view perspective view of the present invention;

[0014] Figure 3 This is a top view of the present invention;

[0015] Figure 4 For the present utility model Figure 3 AA section view;

[0016] Figure 5 For the present utility model Figure 3 BB cross-sectional view.

[0017] The components include: 1. Caster bracket; 11. Mounting plate; 12. Side plate; 121. Locking post; 13. Support base; 131. Through hole; 2. Wheel; 3. Shock absorption assembly; 31. Elastic component; 311. Compression post; 312. Spring; 313. Limiting plate; 314. Nut; 315. Collar; 32. Transmission component; 321. Rotating plate; 322. Connecting post; 323. Locking groove; 324. Engaging part. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] The specific embodiments of this utility model will now be described with reference to the accompanying drawings:

[0020] like Figure 1-5 As shown, a double-spring shock-absorbing caster includes a caster bracket 1, a wheel 2, and a shock-absorbing assembly 3. The caster bracket 1 is a downward-opening U-shaped structure formed by connecting a mounting plate 11 and two sets of side plates 12. The two sets of side plates 12 are connected by a support base 13. The shock-absorbing assembly 3 includes an elastic member 31 and a transmission member 32. The elastic member 31 is movably connected to the support base 13. The middle part of the transmission member 32 is rotatably connected to the lower end of the two sets of side plates 12. One end of the transmission member 32 is connected to the elastic member 31, and the other end of the transmission member 32 is rotatably connected to the wheel 2.

[0021] The transmission component 32 includes a rotating plate 321 and a connecting column 322. The rotating plate 321 comprises two sets, with the middle portions of the two sets rotatably connected to the lower ends of two sets of side plates 12. The front ends of the two sets of rotating plates 321 are connected via the connecting column 322, and the rear ends of the two sets of rotating plates 321 are respectively connected to the rotating shaft of the wheel 2. The support base 13 has a through hole 131 extending vertically. The elastic component 31 includes a compression column 311, a spring 312, a limiting plate 313, and a nut 314. The lower end of the compression column 311 is provided with a collar 315, which passes downward through the through hole 131 and fits onto the connecting column 322. The upper end of the compression column 311 is threadedly engaged with the nut 314. The spring 312 is fitted onto the outside of the compression column 311. The lower end of the spring 312 abuts against the upper end surface of the support base 13, and the upper end of the spring 312 abuts against the lower end surface of the nut 314 through the limiting plate 313. The elastic member 31 includes two sets, which are symmetrical about the wheel 2 as the center of symmetry.

[0022] Furthermore, the rotating plate 321 is provided with a slot 323, and the slot 323 is provided with a plurality of upwardly recessed engaging portions 324 at equal intervals along the length direction of the rotating plate 321. The lower end of the side plate 12 is provided with a locking post 121, and the locking post 121 is detachably connected to the engaging portion 324.

[0023] Description of the working principle of this utility model:

[0024] The double-spring shock-absorbing caster with this structure has a rotating plate 321 rotatably connected to the lower end of the side plate 12, with the lower ends of the two sets of side plates 12 on the caster bracket 1 as the rotation center. The connecting column 322 at the front end of the rotating plate 321 is fitted with a collar 315 at the lower end of the compression column 311. The wheel 2 at the rear end of the rotating plate 321 abuts against the ground. When the wheel 2 passes over a bumpy road, the wheel 2 will move upward, causing the connecting column 322 to move downward, thereby pulling the compression column 311 downward. In order to achieve the shock absorption effect, a spring 312 is fitted on the outside of the compression column 311, and the lower end of the spring 312 abuts against the support base 13. The upper end of the spring 312 is limited by the limiting plate 313. Therefore, when the wheel 2 is subjected to the upward force of the bump, the connecting column 322 will pull the collar 315, causing the limiting plate 313 to compress the spring 312 downward, thereby playing a shock absorption role. The nut 314 locked at the upper end of the compression column 311 can adjust the compression force of the spring 312, thereby changing the shock absorption effect. Since the compression column 311 does not move up and down in a straight line during the rotation of the rotating plate 321, the through hole 131 is a long hole with the length of the rotating plate 321 as the direction. Therefore, the compression column 311 will not be obstructed by the through hole 131 during the up and down movement.

[0025] The two sets of elastic components 31 with the wheel 2 as the center of symmetry constitute the structure of double spring 312. Compared with single spring 312, it can withstand stronger forces and has better stability due to left-right symmetry.

[0026] A slot 323 is added to the rotating plate 321. Several engaging parts 324 are distributed above the slot 323. The locking post 121 on the lower end of the side plate 12 can be inserted into the engaging part 324. By changing the position of the locking post 121 in the engaging part 324, the relative distance between the engaged part 324 and the connecting post 322 and the wheel 2 can be changed, thereby changing the torque. When the locking pin 121 engages with the engagement part 324 closest to the wheel 2, the distance between the engagement part 324 and the connecting pin 322 is longer than the distance between the engagement part 324 and the wheel 2. Therefore, a greater force is required to force the wheel 2 to move upward. Thus, the caster is relatively stiff and suitable for heavy-duty use. When the locking pin 121 engages with the engagement part 324 closest to the connecting pin 322, the distance between the engagement part 324 and the connecting pin 322 is shorter than the distance between the engagement part 324 and the wheel 2. Therefore, a less force is required to force the wheel 2 to move upward. Thus, the caster is relatively soft and suitable for transporting fragile goods. When the locking pin 121 engages with the engagement part 324 at the middle of the rotating plate 321, it is in a moderate state. When it is necessary to change the insertion of the locking post 121 into different engaging parts 324, simply lift the handcart mounted on the caster so that the wheel 2 leaves the ground, and the locking post 121 can be disengaged from the engaging part 324, thereby changing the different engaging parts 324 into which the locking post 121 is inserted to achieve different effects.

[0027] The beneficial effects of this utility model are as follows: the front and rear ends of the rotating plate 321 are connected to the connecting column 322 and the wheel 2 respectively. With the middle part of the rotating plate 321 as the rotation center, when the wheel 2 passes over a bumpy road, it will move upward, which will cause the connecting column 322 to move downward and pull the compression column 311 downward. The limiting plate 313 above the compression column 311 is compressed downward by the spring 312. Therefore, the shock absorption effect is achieved under the action of the spring 312. The nut 314 can be adjusted to change the compression force of the spring 312 to achieve different rebound force requirements. At the same time, the two sets of elastic components 31 with the wheel 2 as the center of symmetry can achieve a more balanced effect and can withstand stronger forces, making the caster more adaptable. The setting of the slot 323 and the engaging part 324 can change the applicability of the caster, so that it can be changed at will in different states of heavy load, carrying fragile objects and general transportation.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dual spring shock absorbing caster wheel characterized by: The system includes a caster bracket, wheels, and a shock-absorbing assembly. The caster bracket is a downward-opening U-shaped structure formed by a mounting plate and two sets of side plates connected together, with the two sets of side plates connected by a support base. The shock-absorbing assembly includes an elastic component and a transmission component. The elastic component is movably connected to the support base, and the middle part of the transmission component is rotatably connected to the lower ends of the two sets of side plates. One end of the transmission component is connected to the elastic component, and the other end is rotatably connected to the wheel. The transmission component includes a rotating plate and a connecting column. The rotating plate comprises two sets, with the middle parts of the two sets of rotating plates rotatably connected to the lower ends of the two sets of side plates, the front ends of the two sets of rotating plates connected by the connecting column, and the rear ends of the two sets of rotating plates respectively connected to the wheel's axle. The support base has a through hole running vertically through the entire structure. The components include a compression column, a spring, a limiting plate, and a nut. The lower end of the compression column has a collar that passes downward through a through hole and fits onto the connecting column. The upper end of the compression column is threaded into the nut. The spring is fitted onto the outside of the compression column, with its lower end abutting against the upper surface of the support base and its upper end abutting against the lower surface of the nut via the limiting plate. The elastic components include two sets, which are symmetrical about the wheel. The rotating plate has a slot with several upwardly recessed engaging parts at equal intervals along the length of the rotating plate. The lower end of the side plate has a locking post that is detachably connected to the engaging parts. By changing the position of the locking post within the engaging parts, the relative distance between the engaged part and the connecting column and the wheel can be changed, thereby altering the torque.

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