A weighing wheel set

Abstract

The application relates to a kind of weighing wheel groups, and the weighing wheel group includes weighing induction assembly, wheel seat, roller support, shaft sleeve and the roller mounted on roller support, weighing induction assembly includes bearing seat, weighing sensor, bearing ball and bearing shaft, weighing sensor includes outer pressure end and inner force end, outer pressure end is buckled with bearing seat, inner force end is suspended in the lower part of bearing seat, bearing shaft is located just below inner force end, bearing ball is connected with the ball cage for floatingly supporting bearing ball in the lower part of bearing seat.Because of the setting floating ball cage, when weighing, bearing ball is respectively contacted with inner force end and bearing shaft, effectively reduces the lateral component of bearing shaft, the force vertically transmitted to weighing sensor is maximumly close to the weight of the weight, improves the accuracy and repeatability of weighing.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of weighing sensor, and particularly relates to a kind of weighing wheel groups. BACKGROUND

[0002] The existing universal wheel group weighing device for luggage is not accurate and has poor repeatability when weighing due to the eccentric structure of the universal wheel. SUMMARY

[0003] The present application provides a kind of weighing wheel group, which is supported by floating ball retainer between the force end of weighing sensor and the bearing shaft, and the upward force of bearing shaft is conducted to the inner force end of weighing sensor through the bearing ball, so that the weighing is not only accurate but also has good repeatability.

[0004] The present application is implemented by providing a kind of weighing wheel group, which comprises a weighing sensing assembly, a wheel seat, a roller support, a shaft sleeve and a roller mounted on the roller support, 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 pressure receiving end and an inner force receiving end, the outer pressure receiving end is connected with the bearing seat, and the inner force receiving end is suspended at the lower part of the bearing seat, the bearing shaft is located directly below the inner force receiving end, and a ball retainer is connected at the lower part of the bearing seat for floatingly supporting the bearing ball, when the weighing wheel group is in the weighing state, the upper surface of the bearing ball abuts against the lower surface of the inner force receiving end, and the lower surface of the bearing ball abuts against the upper surface of the bearing shaft, a longitudinal shaft hole is formed in the wheel seat, the roller support is arranged below the wheel seat, the bearing seat is connected with the upper end of the wheel seat, the shaft sleeve is installed in the longitudinal shaft hole, and 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 support.

[0005] Further, 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 curved arms, the inner ring is provided with ball pockets, and the bearing ball is arranged in the ball pockets.

[0006] Further, a plurality of connecting buckles are arranged on the outer ring, and the lower part of the bearing seat is provided with a first hanging buckle corresponding to each connecting buckle.

[0007] Further, the roller support is provided with rollers at both sides of the lower end, the shafts of the rollers at both sides are connected with the lower end of the roller support through wheel shafts, the upper end of the roller support is provided with a shaft mounting hole in the longitudinal direction, and the lower end of the bearing shaft is movably installed in the shaft mounting hole.

[0008] Further, a plurality of axial strip grooves are formed on the inner wall of the shaft sleeve in the circumferential direction.

[0009] Further, a limiting and sliding gap is arranged between the lower end of the shaft sleeve and the roller support, and a cover portion is arranged around the limiting and sliding gap at the lower end of the wheel seat.

[0010] Further, a positioning ring groove is radially arranged at the lower end of the bearing shaft, and a positioning pin hole is transversely arranged at one side or both sides of the shaft mounting hole of the roller support, and the positioning pin is inserted into the positioning pin hole and located in the positioning ring groove.

[0011] Further, a plurality of second hanging buckles for buckling the outer pressure-bearing end are arranged on the bearing seat.

[0012] Compared with the prior art, the weighing wheel set of the present application is provided with a bearing ball supported by a floating ball retainer between the force receiving end of the weighing sensor and the bearing shaft, and the force acting on the bearing shaft is transmitted to the inner force receiving end of the weighing sensor through the bearing ball. The inner ring and the outer ring of the ball retainer are connected by a plurality of elastic curved arms, so that the inner ring can be moved by the elastic curved arms inside the outer ring to make the inner ring in a floating state. The bearing ball is arranged in the ball pocket of the inner ring, so that the bearing ball can freely roll in the ball pocket, so that the bearing ball is in vertical contact with the inner force receiving end and the bearing shaft during weighing, effectively reducing the lateral component of the bearing shaft, and the force transmitted vertically to the weighing sensor is maximized to approach the weight of the object to be weighed, improving the accuracy and repeatability of weighing. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the weighing wheel set of the present application;

[0014] Figure 2 is a side view of Figure 1 ;

[0015] Figure 3 is a sectional view of Figure 2 along A-A;

[0016] Figure 4 is a front view of Figure 1 ;

[0017] Figure 5 is a sectional view of Figure 4 along B-B;

[0018] Figure 6 is a perspective view of the weighing sensing assembly in Figure 1 ;

[0019] Figure 7 is an exploded view of Figure 6 ;

[0020] Figure 8 is a perspective view of the weighing sensing assembly in Figure 6The figure shows the perspective view of the weighing wheel group in the state of dismounting the bearing shaft.

[0021] Figure 9 For Figure 5 The figure shows the perspective view of the assembly state of the bearing shaft and the bearing sleeve. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0023] Please refer to Figures 1-9 The figure shows the perspective view of the weighing wheel group in the state of dismounting the bearing shaft.

[0024] The weighing sensor 2 includes an outer pressure bearing end 21 and an inner force receiving end 22. The outer pressure bearing end 21 is buckled with the bearing seat 1, and the inner force receiving end 22 is suspended in the lower part of the bearing seat 1. The bearing shaft 4 is located directly below the inner force receiving end 22. A ball retainer 5 is connected to the lower part of the bearing seat 1 for floatingly supporting the bearing ball 3. When the weighing wheel group is in the state of weighing, the upper surface of the bearing ball 3 abuts against the lower surface of the inner force receiving end 22, and the lower surface of the bearing ball 3 abuts against the upper surface of the bearing shaft 4.

[0025] The ball retainer 5 includes 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 curved arms 53. The inner ring 52 is provided with a ball pocket 521, and the bearing ball 3 is arranged in the ball pocket 521. Therefore, the inner ring 52 can be moved in the inner part of the outer ring 51 by the elastic curved arms 53, so that the bearing ball 3 is in vertical contact with the inner force receiving end 22 and the bearing shaft 4 respectively when weighing, effectively reducing the lateral component force of the bearing shaft 4, and the force vertically transmitted to the weighing sensor 2 is maximized to approach the weight of the object to be weighed, thereby improving the accuracy and repeatability of weighing.

[0026] 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 for buckling the outer pressure 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 by buckling, which is convenient for assembly and production, and the structure is stable and reliable. The connection mode is not limited to the buckling mode in the embodiment.

[0027] The wheel seat 6 is provided with a longitudinal shaft hole 61, the roller support 7 is arranged below the wheel seat 6, the bearing seat 1 is connected to 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 is connected to the roller support 7. It should be noted that the bearing seat 1 is provided with a threaded mounting hole on the side, which is fixedly connected to the wheel seat 6 through the threaded mounting hole and the screw 13. The lower end of the shaft sleeve 9 is provided with a connecting lug 91 on both sides, the connecting lug 91 is provided with a screw hole, and the shaft sleeve 9 is installed on the wheel seat 60 through the screw hole and the fastening screw 14.

[0028] The lower end of the roller support 7 is provided with a roller 8 on both sides, and the axial direction of the rollers 8 on both sides is connected to the lower end of the roller support 7 through the wheel shaft 80. The upper end of the roller support 7 is provided with a shaft mounting hole 70 in the longitudinal direction, and the lower end of the bearing shaft 4 is movably installed in the shaft mounting hole 70. The bearing shaft 4 can rotate and slide up and down in the shaft mounting hole 70. The lower end of the bearing shaft 4 is provided with a positioning ring groove 40 in the radial direction. The shaft mounting hole 70 of the roller support 7 is provided with a positioning pin hole 71 on one side or both sides in the transverse direction. The positioning pin 10 is inserted into the positioning pin hole 71 and located in the positioning ring groove 40.

[0029] Although the drawings show that one roller 8 is arranged on each side of the lower end of the roller support 7, the structure in which only one roller 8 is arranged on the lower end of the roller support 7 should also be within the protection scope of the present application.

[0030] A limiting guide sliding gap 100 is arranged between the lower end of the shaft sleeve 9 and the roller support 7. The purpose is to ensure that the weighing sliding distance between the inner force receiving end 22 of the weighing sensor 2 and the bearing shaft 4 is not affected during weighing, and to limit the movement of the bearing shaft 4 in the direction of the bearing ball 3 when the upper end of the roller support 6 is in contact with the end face of the shaft sleeve 9, thereby protecting the weighing sensor 2 from being damaged by a large impact.

[0031] The lower end of the wheel seat 6 is provided with a cover part 60 around the outer periphery of the limiting guide sliding gap 100, which can play a dustproof role. The upper end of the bearing shaft 4 is provided with a shaft end cap part 41, and a plurality of axial strip grooves 90 are formed on the inner wall of the shaft sleeve 9 along the circumferential direction thereof. When the bearing shaft 4 and the shaft sleeve 9 are connected and guided, the lubricating grease is accumulated in the axial strip grooves 90, so that they are more wear-resistant when cooperating with each other. Moreover, it has a dustproof function, avoiding that dust particles affect the cooperation gap between the bearing shaft 4 and the shaft sleeve 9, but are accumulated in the axial strip grooves 90.

[0032] The weighing wheel set of the present application is not only used on the luggage box, but also used on the packaging box, the garbage can, the cart and other box bodies suitable for weighing.

[0033] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A group of load wheels, characterized in that, The weighing sensing assembly includes a bearing seat (1), a weighing sensor (2), a bearing ball (3) and a bearing shaft (4), the bearing ball (3) is 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) includes an outer pressure bearing end (21) and an inner force receiving end (22), the outer pressure bearing end (21) is buckled with the bearing seat (1), the inner force receiving end (22) is suspended at the lower part of the bearing seat (1), the bearing shaft (4) is located directly below the inner force receiving end (22), a ball retainer (5) for floatingly supporting the bearing ball (3) is connected at the lower part of the bearing seat (1), when the weighing wheel assembly is in a weighing state, the upper surface of the bearing ball (3) abuts against the lower surface of the inner force receiving end (22), and the lower surface of the bearing ball (3) abuts against the upper surface of the bearing shaft (4); a longitudinal shaft hole (61) is formed in the wheel seat (6), the roller 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), and the upper end of the bearing shaft (4) is arranged in the shaft sleeve (9), and the lower end of the bearing shaft (4) is connected with the roller support (7); The ball retainer (5) includes 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 curved arms (53), the inner ring (52) is provided with a ball pocket (521), and the bearing ball (3) is arranged in the ball pocket (521); A plurality of connecting buckles (54) are arranged on the outer ring (51), and the lower part of the bearing seat (1) is correspondingly provided with a first hanging buckle (11) buckled with each connecting buckle (54).

2. The load wheel set of claim 1, wherein, The lower end of the roller support (7) is provided with a roller (8) on each side, the axial directions of the two rollers (8) are connected with the lower end of the roller support (7) through wheel shafts (80), the upper end of the roller support (7) is provided with a shaft mounting hole (70) in the longitudinal direction, and the lower end of the bearing shaft (4) is movably installed in the shaft mounting hole (70).

3. A load wheel set as claimed in claim 2, characterized in that A plurality of axial strip grooves (90) are formed on the inner wall of the shaft sleeve (9) and in the circumferential direction of the shaft sleeve (9).

4. The load wheel set of claim 2, wherein, A limiting guide sliding gap (100) is arranged between the lower end of the shaft sleeve (9) and the roller support (7), and the lower end of the wheel seat (6) is provided with a cover portion (60) surrounding the outer periphery of the limiting guide sliding gap (100).

5. The load wheel set of claim 2, wherein, The lower end of the bearing shaft (4) is provided with a positioning ring groove (40) in the radial direction, and the shaft mounting hole (70) of the roller support (7) is provided with a positioning pin hole (71) penetrating through one side or both sides in the transverse direction, the positioning pin (10) is inserted into the positioning pin hole (71) and located in the positioning ring groove (40).

6. The load wheel set of claim 1, wherein, A plurality of second hanging buckles (12) for buckling the outer pressure bearing end (21) are arranged on the bearing seat (1).

Images