CN114224048A

CN114224048A - Weighing wheel set

Info

Publication number: CN114224048A
Application number: CN202210050708.2A
Authority: CN
Inventors: 赵学群; 徐福保
Original assignee: Jiaxing Zhaofu Electronic Technology Co ltd
Current assignee: Jiaxing Zhaofu Electronic Technology Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-03-25

Abstract

The invention relates to a weighing wheel set. The weighing wheel set includes a weighing sensing component, a wheel seat, a roller bracket, a shaft sleeve and a roller installed on the roller bracket. The weighing sensing component includes a bearing seat, a weighing sensor, a bearing Ball and bearing shaft, the load cell includes an outer pressure bearing end and an inner force bearing end, the outer pressure bearing end is buckled with the bearing seat, the inner force bearing end is suspended in the lower part of the bearing seat, and the bearing shaft is located just below the inner force bearing end. The lower part of the bearing seat is connected with a ball cage for floatingly supporting the bearing balls. Due to the floating ball cage, when weighing, the bearing balls are in vertical contact with the inner force end and the bearing shaft respectively, which effectively reduces the lateral component force of the bearing shaft and transmits it vertically upward to the load cell on the load cell. The force is as close as possible to the weight of the loaded object, improving the accuracy and repeatability of weighing.

Description

Weighing wheel set

Technical Field

The invention belongs to the technical field of weighing sensors, and particularly relates to a weighing wheel set.

Background

According to the universal wheel set weighing device for the luggage in the prior art, due to the eccentric structure of the universal wheel, when the wheel set is pressed down by a heavy object, the upward acting force of the wheel shaft is not all vertically upward, but a lateral component force can be generated, so that the weighing weight of the wheel set is inaccurate and the repeatability is poor when the wheel set is used for weighing.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a weighing wheel set, which is characterized in that a bearing ball supported by a floating ball retainer is arranged between a bearing end of a weighing sensor and a bearing shaft, and the bearing ball is used for transmitting an acting force in the bearing axial direction to the inner bearing end of the weighing sensor, so that the weighing is accurate and the repeatability is good during weighing.

The invention is realized in such a way, and provides a weighing wheel set, which comprises a weighing sensing assembly, a wheel seat, a wheel support, a shaft sleeve and a wheel arranged on the wheel support, wherein the weighing sensing assembly comprises a bearing seat, a weighing sensor, a bearing ball and a bearing shaft, the bearing ball is arranged between the weighing sensor and the bearing shaft, the weighing sensor is arranged at the lower part of the bearing seat, the weighing sensor comprises an outer bearing end and an inner stress end, the outer bearing end is buckled with the bearing seat, the inner stress end is suspended at the lower part of the bearing seat, the bearing shaft is positioned under the inner stress end, the lower part of the bearing seat is connected with a ball retainer for floatingly supporting the bearing ball, when the weighing wheel set is in a weighing state, the upper surface of the bearing ball is abutted against the lower surface of the inner stress end, and the lower surface of the bearing ball is abutted against the upper surface of the bearing shaft; the wheel seat is provided with a longitudinal shaft hole, the roller wheel bracket is arranged below the wheel seat, the bearing seat is connected with the upper end of the wheel seat, the shaft sleeve is arranged in the longitudinal shaft hole, the upper end of the bearing shaft is arranged in the shaft sleeve, and the lower end of the bearing shaft is connected with the roller wheel bracket.

Furthermore, the ball retainer comprises an outer ring and an inner ring, the inner ring is connected with the outer ring through a plurality of elastic crank arms, a ball pocket is arranged in the inner ring, and bearing balls are arranged in the ball pocket.

Furthermore, the outer ring is provided with a plurality of connecting buckles, and the lower part of the bearing seat is correspondingly provided with a first hanging buckle buckled with each connecting buckle.

Further, the two sides of the lower end of the roller support are respectively provided with rollers, the axial directions of the rollers on the two sides are connected with the lower end of the roller support through a wheel shaft, the upper end of the roller support is longitudinally provided with a shaft mounting hole, and the lower end of the bearing shaft is movably mounted in the shaft mounting hole.

Furthermore, a plurality of axial strip-shaped grooves are formed in the inner wall of the shaft sleeve along the circumferential direction of the shaft sleeve.

Furthermore, a limiting and sliding guiding gap is arranged between the lower end of the shaft sleeve and the roller wheel bracket, and a cover part surrounding the limiting and sliding guiding gap is arranged at the lower end of the roller wheel seat.

Furthermore, the lower end of the bearing shaft is radially provided with a positioning ring groove, one side or two sides of an axle mounting hole of the roller bracket are transversely provided with positioning pin holes in a through mode, and the positioning pin is inserted into the positioning pin holes and is positioned in the positioning ring groove.

Furthermore, a plurality of second hanging buckles used for buckling the outer pressure bearing end are arranged on the bearing seat.

Compared with the prior art, the bearing ball supported by the floating ball retainer is arranged between the bearing end of the weighing sensor and the bearing shaft, and the bearing ball is used for transmitting the axial acting force to the inner bearing end of the weighing sensor. The inner ring and the outer ring of the ball retainer are connected through a plurality of elastic crank arms, so that the inner ring can be in a floating state in the outer ring by the elastic crank arms to restrain the moving position. The bearing balls are arranged in the ball pocket holes of the inner ring, so the bearing balls can freely roll in the ball pocket holes, the bearing balls are respectively vertically contacted with the inner stress end and the bearing shaft when weighing, the lateral component force of the bearing shaft is effectively reduced, the force vertically and upwards transferred to the weighing sensor is maximally close to the weight of a borne heavy object, and the weighing accuracy and repeatability are improved.

Drawings

FIG. 1 is a perspective view of a weighing wheel assembly of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic perspective view of the load sensing assembly of FIG. 1;

FIG. 7 is an exploded view of FIG. 6;

FIG. 8 is a schematic perspective view of the load sensing assembly of FIG. 6 after removal of the load bearing shaft;

fig. 9 is a perspective view illustrating an assembled state of the bearing shaft and the bushing in fig. 5.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 9, the weighing wheel set of the present invention includes a wheel seat 6, a roller bracket 7, a shaft sleeve 9, and a roller 8 mounted on the roller bracket 7. Weighing sensing component is including bearing seat 1, weighing sensor 2, bearing ball 3 and bearing axle 4, bears ball 3 and sets up between weighing sensor 2 and bearing axle 4, and weighing sensor 2 sets up in the lower part that bears seat 1.

The weighing sensor 2 comprises an outer bearing end 21 and an inner bearing end 22, the outer bearing end 21 is buckled with the bearing seat 1, the inner bearing end 22 is suspended at the lower part of the bearing seat 1, the bearing shaft 4 is positioned right below the inner bearing end 22, and the lower part of the bearing seat 1 is connected with a ball retainer 5 for floatingly supporting the bearing balls 3. When the weighing wheel group is in a weighing state, the upper surface of the bearing ball 3 abuts against the lower surface of the inner force bearing end 22, and the lower surface of the bearing ball 3 abuts against the upper surface of the bearing shaft 4.

The ball cage 5 comprises an outer ring 51 and an inner ring 52, the inner ring 52 is connected with the outer ring 51 through a plurality of elastic crank arms 53, a ball pocket 521 is arranged in the inner ring 52, and the bearing balls 3 are arranged in the ball pocket 521. Therefore, the inner ring 52 can be restrained by the elastic crank arms 53 to move in the inner part of the outer ring 51, so that the bearing balls 3 are respectively in vertical contact with the inner force bearing end 22 and the bearing shaft 4 during weighing, the lateral component force of the bearing shaft 4 is effectively reduced, the force vertically transmitted upwards to the weighing sensor 2 is maximally close to the weight of a borne heavy object, and the weighing accuracy and repeatability are improved.

The outer ring 51 is provided with a plurality of connecting buckles 54, and the lower part of the bearing seat 1 is correspondingly provided with a first hanging buckle 11 buckled with each connecting buckle 54. A plurality of second hanging buckles 12 used for buckling the outer bearing end 21 of the weighing sensor 2 are arranged on the bearing seat 1. The weighing sensor 2 and the ball retainer 5 are connected to the bearing seat 1 in a buckling mode, so that the weighing sensor is convenient to assemble and produce, and the structure is stable and reliable. The connection method is not limited to the fastening method in this embodiment.

The wheel seat 6 is provided with a longitudinal shaft hole 61, the roller wheel support 7 is arranged below the wheel seat 6, the bearing seat 1 is connected with the upper end of the wheel seat 6, the shaft sleeve 9 is arranged in the longitudinal shaft hole 61, the upper end of the bearing shaft 4 is arranged in the shaft sleeve 9, and the lower end of the bearing shaft is connected with the roller wheel support 7. It should be noted that the bearing seat 1 is provided with a threaded mounting hole on the periphery, and the bearing seat is fixedly connected with the wheel seat 6 through the threaded mounting hole by a screw 13. The two sides of the lower end of the shaft sleeve 9 are provided with connecting lugs 91, the connecting lugs 91 are provided with screw holes, and the shaft sleeve 9 is installed with the wheel seat 60 through the screw holes by fastening screws 14.

The two sides of the lower end of the roller support 7 are respectively provided with a roller 8, the axial directions of the rollers 8 on the two sides are connected with the lower end of the roller support 7 through a wheel shaft 80, the upper end of the roller support 7 is longitudinally provided with a shaft mounting hole 70, and the lower end of the bearing shaft 4 is movably mounted in the shaft mounting hole 70. The bearing shaft 4 can flexibly rotate and slide up and down in the shaft mounting hole 70. The lower end of the bearing shaft 4 is radially provided with a positioning ring groove 40, one side or two sides of an axle mounting hole 70 on the roller bracket 7 are transversely provided with positioning pin holes 71 in a through manner, and the positioning pins 10 are inserted into the positioning pin holes 71 and positioned in the positioning ring groove 40.

Although the drawings show that the rollers 8 are respectively arranged on both sides of the lower end of the roller bracket 7, some structures that only one roller 8 is arranged on the lower end of the roller bracket 7 should be within the protection scope of the present invention.

Be provided with spacing between axle sleeve 9 lower extreme and the gyro wheel support 7 and lead smooth clearance 100, its aim at on the one hand when guaranteeing to weigh, the sliding distance of weighing between weighing sensor 2's interior stress end 22 and the bearing shaft 4 is not influenced, on the other hand when gyro wheel support 6 upper end and axle sleeve 9 end face contact, the restriction bearing shaft 4 continues to the direction motion of bearing ball 3 to the protection weighing sensor 2 is not damaged by the impact energetically that receives.

The lower end of the wheel seat 6 is provided with a cover part 60 surrounding the limiting sliding guide gap 100, so that the dustproof effect can be achieved. The upper end of the bearing shaft 4 is provided with a shaft end cap part 41, and the inner wall of the shaft sleeve 9 is provided with a plurality of axial strip-shaped grooves 90 along the circumferential direction. When the bearing shaft 4 is guided in connection with the sleeve 9, grease accumulates in the axial grooves 90, making them more resistant to wear when they are fitted to each other. And has dustproof function, avoids dust particle influence bearing shaft 4 and axle sleeve 9 fit clearance in, but gathers in axial bar groove 90.

The weighing wheel set is not only used on a luggage case, but also used on a packing case, a dustbin, a trolley and other cases suitable for weighing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A weighing wheel set is characterized by comprising a weighing sensing assembly, a wheel seat (6), a roller wheel support (7), a shaft sleeve (9) and a roller wheel (8) arranged on the roller wheel support (7), wherein the weighing sensing assembly comprises a bearing seat (1), a weighing sensor (2), bearing balls (3) and a bearing shaft (4), the bearing balls (3) are arranged between the weighing sensor (2) and the bearing shaft (4), the weighing sensor (2) is arranged at the lower part of the bearing seat (1), the weighing sensor (2) comprises an outer bearing end (21) and an inner bearing end (22), the outer bearing end (21) is buckled with the bearing seat (1), the inner bearing end (22) is suspended at the lower part of the bearing seat (1), the bearing shaft (4) is positioned right below the inner bearing end (22), a ball retainer (5) for floatingly supporting the bearing balls (3) is connected at the lower part of the bearing seat (1), when the weighing wheel set is in a weighing state, the upper surface of the bearing ball (3) abuts against the lower surface of the inner stress end (22), and the lower surface of the bearing ball (3) abuts against the upper surface of the bearing shaft (4); the wheel seat (6) is provided with a longitudinal shaft hole (61), the roller wheel support (7) is arranged below the wheel seat (6), the bearing seat (1) is connected with the upper end of the wheel seat (6), the shaft sleeve (9) is installed in the longitudinal shaft hole (61), the upper end of the bearing shaft (4) is arranged in the shaft sleeve (9), and the lower end of the bearing shaft is connected with the roller wheel support (7).

2. Weighing wheel group according to claim 1, characterised in that the ball cage (5) comprises an outer ring (51) and an inner ring (52), the inner ring (52) being connected to the outer ring (51) by means of a plurality of resilient crank arms (53), the inner ring (52) being provided with ball pockets (521), the bearing balls (3) being arranged in the ball pockets (521).

3. Weighing wheel group according to claim 2, characterised in that the outer ring (51) is provided with a plurality of connecting buckles (54), and the lower part of the load-bearing seat (1) is correspondingly provided with a first hanging buckle (11) fastened with each connecting buckle (54).

4. The weighing wheel group according to claim 1, wherein the rollers (8) are respectively arranged on two sides of the lower end of the roller bracket (7), the axial direction of the rollers (8) on the two sides is connected with the lower end of the roller bracket (7) through a wheel shaft (80), a shaft mounting hole (70) is longitudinally formed in the upper end of the roller bracket (7), and the lower end of the bearing shaft (4) is movably mounted in the shaft mounting hole (70).

5. Weighing wheel group according to claim 4, characterised in that the axle sleeve (9) is provided with axial grooves (90) on its inner wall and along its circumferential direction.

6. Weighing wheel set according to claim 4, characterised in that a limiting and sliding-guiding gap (100) is provided between the lower end of the sleeve (9) and the roller bracket (7), and a cover (60) surrounding the limiting and sliding-guiding gap (100) is provided at the lower end of the wheel seat (6).

7. The weighing wheel set as claimed in claim 4, wherein the lower end of the bearing shaft (4) is radially provided with a positioning ring groove (40), one side or two sides of the shaft mounting hole (70) of the roller bracket (7) are transversely provided with positioning pin holes (71) in a through manner, and the positioning pin (10) is inserted into the positioning pin holes (71) and positioned in the positioning ring groove (40).

8. Weighing wheel group according to claim 1, characterised in that several second suspension links (12) are provided on the carrier (1) for fastening the outer bearing end (21).