Connecting assembly and weighing system

Abstract

The utility model discloses a connecting assembly and a weighing system, the connecting assembly comprises a connecting piece and a mounting seat, the connecting piece comprises a first connector arranged at one end of the connecting piece, the mounting seat is provided with a first mounting groove connected with the first connector, a gap is arranged between the first connector and the groove wall of the first mounting groove, and the connecting piece can rotate around the axis of the connecting piece. One of the first connector and the first mounting groove at least comprises an abutting part, the other one of the first connector and the first mounting groove at least comprises a limiting part, and the limiting part limits the abutting part. According to the utility model, the rotation angle of the connecting piece around the axis is limited through the abutting part and the limiting part, the change range of the contact point between the connecting piece and the weighing sensor is reduced, the weighing error caused by the change of the contact point is reduced, and the weighing precision is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of weighing, and particularly relates to a connecting component and a weighing system. Background Art

[0002] In a weighing system constructed by shear beam or bending beam sensors, a weighing sensor is assembled on a support component such as a bracket or a base through a connecting component. The existing connecting component generally includes a connecting piece and a mounting seat. Two ends of the connecting piece are respectively inserted into mounting grooves on the mounting seat and the weighing sensor, providing load support for the weighing sensor and ensuring the accuracy and reliability of the measurement data of the weighing sensor within the rated load.

[0003] However, since the connecting piece is generally cylindrical, and due to assembly errors, the connecting piece cannot always maintain a vertical state during use, but will tilt at a certain angle, causing the contact point position between the connecting piece and the mounting groove on the weighing sensor to change.

[0004] On the other hand, the cylindrical connecting piece will be subjected to a force perpendicular to its axis direction. This force mostly acts along the tangent direction of the connecting piece, and is distributed at the upper and lower ends of the connecting piece, and the directions of the forces at both ends are opposite. Under this force condition, the connecting piece will rotate, and the contact point between the connecting piece and the weighing sensor will change.

[0005] Under the influence of the above two reasons, the change range of the contact point between the connecting piece and the weighing sensor is large, and the change range is uncontrollable, seriously affecting the weighing accuracy of the weighing system.

[0006] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a connecting component, which is used to solve the problem that the large change range of the contact point between the connecting piece and the weighing sensor affects the weighing accuracy.

[0008] To achieve the above purpose, a specific embodiment of the present utility model provides a connecting component, including a connecting piece and a mounting seat. The connecting piece includes a first connecting head provided at one end thereof. The mounting seat is provided with a first mounting groove for connecting the first connecting head. There is a gap between the first connecting head and the groove wall of the first mounting groove. The connecting piece can rotate around its axis. At least one of the first connecting head and the first mounting groove includes at least one abutting portion, and the other at least includes at least one limiting portion, and the limiting portion limits the abutting portion.

[0009] In one or more embodiments of the present utility model, the first connector includes at least one abutting portion provided on its peripheral wall, the first mounting groove includes at least two limiting portions provided on its groove wall, and the abutting portion is located between the two limiting portions.

[0010] In one or more embodiments of the present utility model, when the connecting member rotates in the first direction to the first limiting position, one of the two limiting portions limits the abutting portion.

[0011] In one or more embodiments of the present utility model, when the connecting member rotates in the second direction to the second limiting position, the other of the two limiting portions limits the abutting portion.

[0012] In one or more embodiments of the present utility model, the first connector includes a prismatic or frustum-shaped body portion, and the abutting portion is formed at the peripheral corner of the body portion.

[0013] In one or more embodiments of the present utility model, a chamfer is provided at the peripheral corner of the body portion, and the chamfered surface of the chamfer is a plane or a curved surface.

[0014] In one or more embodiments of the present utility model, the cross-section of the body portion is a regular polygon.

[0015] In one or more embodiments of the present utility model, the first connector further includes a connecting portion coaxially arranged with the body portion, and a first arc surface is provided at one end of the connecting portion away from the body portion, and the first arc surface abuts against the bottom wall of the first mounting groove.

[0016] In one or more embodiments of the present utility model, the first mounting groove includes a plurality of planar groove walls parallel to the axis of the mounting seat, and the two limiting portions are formed on two different groove walls of the first mounting groove.

[0017] In one or more embodiments of the present utility model, the cross-section of the first mounting groove is a regular polygon, and the two limiting portions are formed on two adjacent groove walls of the first mounting groove.

[0018] In one or more embodiments of the present utility model, the abutting portion is configured as a convex block structure, and the limiting portion is configured as a groove structure for accommodating the abutting portion.

[0019] On the other hand, the present utility model further provides a weighing system, including a weighing sensor and the above-mentioned connection assembly. A second mounting groove is provided on the weighing sensor. The connecting member includes a second connector provided on the opposite side of the first connector and accommodated in the second mounting groove. A second arc surface is provided at one end of the second connector away from the first connector, and the second arc surface abuts against the groove wall of the second mounting groove facing the first mounting groove.

[0020] Compared with the prior art, after the connection component of the present utility model is assembled with the weighing sensor, the angle of rotation of the connecting piece around its axis can be restricted through the abutting portion and the limiting portion, the change range of the contact point between the connecting piece and the weighing sensor is reduced, the weighing error caused by the change of the contact point is reduced, and the weighing accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is an exploded structure diagram of the weighing system in Embodiment 7 of the present utility model;

[0023] Figure 2 is a sectional structure diagram of the weighing system in Embodiment 7 of the present utility model;

[0024] Figure 3 is a schematic diagram of the change range of the contact point in Embodiment 7 of the present utility model;

[0025] Figure 4 is a planar exploded view of the weighing system in Embodiment 7 of the present utility model;

[0026] Figure 5 is a three-dimensional structure diagram of the connecting piece in Embodiment 1 of the present utility model;

[0027] Figure 6 is a planar structure diagram of the connecting piece in the first limiting position in Embodiment 1 of the present utility model;

[0028] Figure 7 is a planar structure diagram of the connecting piece in the second limiting position in Embodiment 1 of the present utility model;

[0029] Figure 8 is a planar structure diagram of the connection component in Embodiment 2 of the present utility model;

[0030] Figure 9 is a three-dimensional structure diagram of the connection component in Embodiment 3 of the present utility model;

[0031] Figure 10 is a planar structure diagram of the connection component in Embodiment 4 of the present utility model;

[0032] Figure 11 is a planar structure diagram of the connection component in Embodiment 5 of the present utility model;

[0033] Figure 12 This is the planar structure diagram of the connection component in the sixth embodiment of the present utility model.

[0034] Reference numerals: 1 - connecting member, 11 - first connection head, 111 - body part, 1111 - side edge, 1112 - chamfer, 112 - connection part, 113 - first arc surface, 12 - second connection head, 121 - second arc surface, 13, 23 - abutting part, 14, 22 - limiting part, 15 - first sealing groove, 16 - second sealing groove, 2 - mounting seat, 21 - first mounting groove, 22 - limiting part, 3 - weighing sensor, 4 - first sealing ring, 5 - second sealing ring, 6 - first direction, 7 - second direction, 8 - gap, 9 - central axis. Detailed implementation manners

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0036] Embodiment 1:

[0037] Referring to Figures 1 to 7 As shown, this embodiment provides a connection component, including a connecting member 1 and a mounting seat 2. The connecting member 1 includes a first connection head 11 provided at one end thereof. The mounting seat 2 is provided with a first mounting groove 21 for connecting the first connection head 11. There is a gap 8 between the first connection head 11 and the groove wall of the first mounting groove 21, and the connecting member 1 can rotate around its central axis 9.

[0038] Furthermore, in this embodiment, the first connection head 11 includes a prismatic body part 111, and at least one abutting part 13 is formed at the peripheral corner of the body part 111. A plurality of groove walls of the first mounting groove 21 parallel to the axis of the mounting seat 2 serve as limiting parts 22 to realize the limitation of the abutting part 13.

[0039] Preferably, in this embodiment, the cross-sections of both the body part 111 and the first mounting groove 21 are regular polygons, such as square, regular pentagon, regular hexagon, etc. Among them, the cross-sectional area of the first mounting groove 21 is larger than the cross-sectional area of the body part 111 to form a gap 8 between the body part 111 and the groove wall of the first mounting groove 21.

[0040] In other embodiments, the cross-sections of the body part 111 and the first mounting groove 21 can also be set as polygons of other shapes, such as rectangle.

[0041] Referring to Figures 5 to 7 As shown, in this embodiment, six peripheral corners of the body portion 111 respectively form six abutting portions 13, and six lateral plane groove walls of the first installation groove 21 respectively form six limiting portions 22, which is equivalent to each limiting portion 22 being formed on different groove walls of the first installation groove 21. And the six limiting portions 22 of the first installation groove 21 and the six abutting portions 13 are arranged at intervals, and each abutting portion 12 is located between two limiting portions 22.

[0042] Preferably, the two limiting portions 22 that limit the same abutting portion 13 are formed on two adjacent groove walls of the first installation groove 21, that is, each abutting portion 12 is located between two adjacent limiting portions 22.

[0043] In specific applications, without considering material deformation, the side edge 1111 on the body portion 111 that abuts against the limiting portion 22 is parallel to its central axis 9, or is a certain section or a certain end point on the above side edge 1111.

[0044] Referring to Figure 6 As shown, when the connecting member 1 rotates to the first limiting position along the first direction 6, one of the limiting portions 22 limits the abutting portion 13 in contact with it.

[0045] Referring to Figure 7 As shown, when the connecting member 1 rotates to the second limiting position along the second direction 7, another limiting portion 22 adjacent to the above limiting portion 22 limits the same abutting portion 13.

[0046] Referring to Figure 5 As shown, in this embodiment, a chamfer 1112 is provided on the peripheral corner of the body portion 111. The chamfer surface of the chamfer 1112 is a plane, and two side edges 1111 of the chamfer 1112 form the abutting portion 13. When the connecting member 1 is in the first limiting position, one side edge 1111 of the chamfer 1112 abuts against the corresponding groove wall of the first installation groove 21. When the connecting member 1 is in the second limiting position, the other side edge 1111 of the chamfer 1112 abuts against the corresponding groove wall of the first installation groove 21.

[0047] In other embodiments, the chamfer surface of the above chamfer 1112 can also be set as a curved surface, and the curved surface forms the abutting portion 13. When the connecting member 1 is in the first limiting position and the second limiting position, a certain area on the curved surface abuts against the corresponding groove wall of the first installation groove 21.

[0048] Referring to Figure 1 、 Figure 2 and Figure 4As shown, in this embodiment, the first connector 11 further includes a connecting portion 112 coaxially arranged with the main body portion 111. One end of the connecting portion 112 away from the main body portion 111 is provided with a first arc surface 113, and the first arc surface 113 abuts against the bottom wall of the first installation groove 21.

[0049] Embodiment Two:

[0050] Referring to Figure 8 As shown, the difference between this embodiment and Embodiment One is:

[0051] The main body portion 111 of the first connector 11 and the first installation groove 21 are configured as frustum-shaped bodies, and the cross-section of the main body portion 111 and the first installation groove 21 is square. Four peripheral corners of the main body portion 111 form two pairs of abutting portions 13, and four lateral groove walls of the first installation groove 21 form two pairs of limiting portions 22.

[0052] Embodiment Three:

[0053] Referring to Figure 9 As shown, the difference between this embodiment and Embodiment One is:

[0054] The main body portion 111 of the first connector 11 is configured as a frustum-shaped body, and the first installation groove 21 is configured as a prismatic groove. The cross-section of the main body portion 111 and the first installation groove 21 is regular hexagon. Six peripheral corners of the main body portion 111 form three pairs of abutting portions 13, and six lateral groove walls of the first installation groove 21 form three pairs of limiting portions 22.

[0055] Embodiment Four:

[0056] Referring to Figure 10 As shown, the difference between this embodiment and Embodiment One is:

[0057] The connecting member 1 is a column with a circular or elliptical cross-section, and the cross-section of the first installation groove 21 is also circular or elliptical and adapted to the connecting member 1. One abutting portion 13 is arranged in the circumferential direction of the first connector 11, and the abutting portion 13 is configured as a convex block. One limiting portion 22 is arranged on the groove wall of the first installation groove 21. The abutting portion 13 rotates following the connecting member 1 within the space formed by the limiting portion 22 to realize the limitation of the connecting member 1.

[0058] When the connecting member 1 rotates to the first limiting position along the first direction 6, the end face on one side of the limiting portion 22 limits the abutting portion 13.

[0059] When the connecting member 1 rotates to the second limiting position along the second direction 7, the end face on the other side of the limiting portion 22 limits the abutting portion 13.

[0060] Embodiment Five:

[0061] Referring to Figure 11As shown, the difference between this embodiment and the fourth embodiment is as follows:

[0062] On the groove wall of the first installation groove 21, an abutting portion 23 is provided. The abutting portion 23 is configured as a convex block. On the circumference of the first connector 11, a limiting portion 14 is provided. The abutting portion 23 rotates within the space formed by the limiting portion 14 following the rotation of the connecting member 1, thereby achieving the limitation of the connecting member 1.

[0063] Embodiment Six:

[0064] Referring to Figure 12 As shown, the difference from the fourth embodiment is as follows:

[0065] Furthermore, on the circumference of the first connector 11, two oppositely arranged abutting portions 13 are provided. The abutting portions 13 are configured as convex blocks. On the groove wall of the first installation groove 21, two oppositely arranged limiting portions 22 are provided. The abutting portions 13 rotate within the space formed by the limiting portions 22 following the rotation of the connecting member 1, thereby achieving the limitation of the connecting member 1.

[0066] Embodiment Seven:

[0067] Referring to Figures 1 to 4 As shown, this embodiment provides a weighing system, which includes a weighing sensor 3 and the connection assembly in any of the above embodiments.

[0068] Specifically, a second installation groove 31 is provided on the weighing sensor 3. The connecting member 1 includes a second connector 12 disposed on the opposite side of the first connector 11 and connecting to the second installation groove 31. At the end of the second connector 12, a second arc surface 121 is provided, and the second arc surface 121 abuts against the groove wall of the second installation groove 31 facing the first installation groove 21.

[0069] Furthermore, a first sealing groove 15 is provided on the circumference of the first connector 11, and a first sealing ring 4 is sleeved in the first sealing groove 15. After the first connector 11 is inserted into the mounting seat 2, the first sealing ring 4 is located within the first installation groove 21. Similarly, a second sealing groove 16 is provided on the circumference of the second connector 12, and a second sealing ring 5 is sleeved in the second sealing groove 16. After the second connector 12 is inserted into the second installation groove 31, the second sealing ring 5 is located within the second installation groove 31.

[0070] After the connection assembly of this embodiment is assembled with the weighing sensor 3, without considering the deformation of the second connector 12, the contact mode between the second arc surface 121 and the groove wall of the second installation groove 31 is point contact.

[0071] Referring to Figure 2 As shown, in the prior art, the connecting member 1 can rotate 360° in the axial direction, that is, the maximum value of the rotation angle Ф of the connecting member 1 is 360°.

[0072] After setting the abutting portion 13 and the limiting portion 22 to limit the rotation angle of the connecting member 1 about its axis, the rotation angle Ф of the connecting member 1 is restricted within a certain range. Generally, the rotation angle Ф of the connecting member 1 is not greater than 20°. In other cases, the rotatable range of the connecting member 1 can be appropriately enlarged, and its rotation angle Ф can be correspondingly set to 25°, 30°, 35° or 40°.

[0073] The reduction of the rotation angle of the connecting member helps to reduce the variation range of the contact point between the connecting member 1 and the weighing sensor 3, and reduces the weighing error caused by the change of the contact point.

[0074] Moreover, by controlling the positions and dimensions of the body portion 111, the first mounting groove 21, the abutting portion 13 and the limiting portion 22, the rotation angle Ф of the connecting member 1 can be accurately controlled, so as to control the rotation angle Ф of the connecting member 1 within a reasonable range.

[0075] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0076] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A connecting component, characterized in that, It includes a connecting piece and a mounting seat. The connecting piece includes a first connecting head provided at one end thereof. The mounting seat is provided with a first mounting groove for connecting the first connecting head. There is a gap between the first connecting head and the groove wall of the first mounting groove. The connecting piece can rotate around its axis. At least one of the first connecting head and the first mounting groove includes at least one abutting portion, and the other of them includes at least one limiting portion, and the limiting portion limits the abutting portion.

2. The connection component according to claim 1, wherein The first connecting head includes at least one abutting portion provided on its peripheral wall. The first mounting groove includes at least two limiting portions provided on its groove wall. The abutting portion is located between the two limiting portions. When the connecting piece rotates in the first direction to the first limiting position, one of the two limiting portions limits the abutting portion. When the connecting piece rotates in the second direction to the second limiting position, the other of the two limiting portions limits the abutting portion.

3. The connecting component according to claim 1, wherein, The first connecting head includes a prismatic or frustum-shaped body portion, and the abutting portion is formed at the peripheral corner of the body portion.

4. The connecting component according to claim 3, characterized in that, A chamfer is provided at the peripheral corner of the body portion, and the chamfer surface of the chamfer is a plane or a curved surface.

5. The connecting component according to claim 3, characterized in that, The cross-section of the body portion is a regular polygon.

6. The connecting component according to claim 3, characterized in that The first connecting head further includes a connecting portion coaxially arranged with the body portion. A first arc surface is provided at one end of the connecting portion away from the body portion, and the first arc surface abuts against the bottom wall of the first mounting groove.

7. The connecting component according to claim 2, characterized in that, The first mounting groove includes a plurality of flat groove walls parallel to the axis of the mounting seat, and the two limiting portions are formed on two different groove walls of the first mounting groove.

8. The connecting component according to claim 7, characterized in that The cross-section of the first mounting groove is a regular polygon, and the two limiting portions are formed on two adjacent groove walls of the first mounting groove.

9. The connecting component according to claim 1, wherein The abutting portion is configured as a bump structure, and the limiting portion is configured as a groove structure for accommodating the abutting portion.

10. A weighing system, characterized in that, Comprising: a load cell provided with a second mounting groove; and a connecting assembly according to any one of claims 1 to 9, wherein the connecting piece includes a second connecting head provided on the opposite side of the first connecting head and accommodated in the second mounting groove. A second arc surface is provided at one end of the second connecting head away from the first connecting head, and the second arc surface abuts against the groove wall of the second mounting groove facing the first mounting groove.

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