Lifting weighing type sorting trolley

Abstract

The utility model provides a lifting weighing type sorting trolley. The sorting trolley comprises a frame, a bearing structure and a passive lifting structure, the passive lifting structure comprises a base, a lifting support and a lifting supporting piece. The base is mounted on a frame; the lifting bracket is movably connected to the base; the lifting bracket can be used for lifting and lowering the base; the bearing structure is mounted on the lifting bracket; the lifting supporting piece is arranged on the lifting support or the bearing structure. A passive lifting structure based on a parallelogram mechanism is introduced between the frame and the bearing structure of the sorting trolley; the passive lifting structure is lifted through the weighing platform, so that the weight of the bearing structure can be borne on the weighing platform, and accurate weighing is achieved; due to the fact that the frame is not borne on the weighing platform, the interaction force between the frames of the different sorting trolleys does not affect the weighing precision, and therefore dynamic and accurate weighing of the cargoes on the sorting machine is achieved while a large number of weighing sensors are avoided from being used.

Description

Technical Field

[0001] This utility model belongs to the technical field of logistics sorting equipment, specifically relating to a lifting and weighing sorting trolley. Background Technology

[0002] To weigh goods on a sorting machine, it is usually necessary to install a weighing sensor on each sorting cart. For example, patent publication number "CN112191551A" provides a dynamic weighing method for goods based on a weighing cart on a cross-belt sorting machine, which can accurately detect the weight of goods through the weighing sensor on the sorting cart. However, this weighing method increases the cost of the sorting machine by installing weighing sensors on all sorting carts. On the other hand, the dynamic uploading of weight data by the sorting cart requires the use of a sliding contact line, which increases the complexity of the communication structure.

[0003] Alternatively, an independent weighing track can be separated from the sorting machine track to weigh the entire passing cart. However, the connection structure and interaction forces between adjacent carts will have a significant impact on the weighing results, resulting in lower accuracy of this weighing method. Summary of the Invention

[0004] The purpose of this utility model is to provide a lifting and weighing sorting trolley.

[0005] In a first aspect, this utility model provides a lifting and weighing sorting trolley, which includes a frame, a load-bearing structure, and a passive lifting structure; the passive lifting structure includes a base, a lifting bracket, and a lifting support member; the base is mounted on the frame; the lifting bracket is movably connected to the base; the lifting bracket can raise and lower the base; the load-bearing structure is mounted on the lifting bracket; the lifting support member is on the lifting bracket or the load-bearing structure.

[0006] Preferably, the passive lifting structure further includes a connecting rod. One end of the connecting rod forms a revolute joint with the base; the other end of the connecting rod forms a revolute joint with the lifting bracket; the base, the lifting bracket, and at least two connecting rods form a parallelogram mechanism.

[0007] Preferably, there are two connecting rods. The top of the base is connected to the top of the lifting bracket via a first connecting rod; the bottom of the base is connected to the bottom of the lifting bracket via a second connecting rod.

[0008] Preferably, in the initial state, the lifting bracket is supported on the vehicle frame; in the weighing state, the lifting bracket is separated from the vehicle frame; the lifting support is supported by the weighing platform.

[0009] Preferably, in the initial state, the connecting rod is tilted; the end of the connecting rod connected to the lifting bracket is lower than the end of the connecting rod connected to the base. Under weighing conditions, the connecting rod is in a horizontal position.

[0010] Preferably, the lifting bracket includes a rod portion and a support portion. The connecting rod is connected to the rod portion; the middle part of the support portion is fixed to the rod portion; lifting support members are installed at the bottom of both outer sides of the support portion.

[0011] Preferably, the vehicle frame is provided with a support surface that mates with the bottom of the lifting bracket; in the initial state, the lifting bracket is supported on the support surface of the vehicle frame.

[0012] Preferably, the lifting support is a lifting roller; the lifting roller is rotatably connected to the lifting bracket or load-bearing structure.

[0013] Preferably, the bearing structure is a tilting bearing structure; the tilting bearing structure includes a tilting reset structure and a tray; the tray is installed on top of the tilting reset structure.

[0014] Preferably, the supporting structure adopts a belt conveyor structure. The belt conveyor structure includes a conveyor support frame, a drive roller, a driven roller, and a conveyor belt. The conveyor support frame is fixed to the top of the lifting support frame; the drive roller and the driven roller are respectively installed at both ends of the conveyor support frame. The drive roller and the driven roller are connected by the conveyor belt.

[0015] Preferably, the frame is equipped with a set of guide support wheels that cooperate with the sorting machine track.

[0016] The beneficial effects of this utility model are:

[0017] This invention introduces a passive lifting structure based on a parallelogram mechanism between the frame and the supporting structure of the sorting trolley. By lifting the passive lifting structure through the weighing platform, the weight of the supporting structure can be supported on the weighing platform, thus achieving accurate weighing. Since the frame is not supported on the weighing platform, the interaction force between the frames of different sorting trolleys will not affect the weighing accuracy. Therefore, dynamic and accurate weighing of goods on the sorting machine can be achieved without using a large number of weighing sensors. Attached Figure Description

[0018] Figure 1 This is a side view of Embodiment 1 of the present invention.

[0019] Figure 2 This is a schematic diagram of the combination of the frame, guide support wheel set, and passive lifting structure in Embodiment 1 of this utility model.

[0020] Figure 3This is a schematic diagram of the weighing process in Embodiment 1 of this utility model.

[0021] Figure 4 This is a side view of Embodiment 2 of the present invention.

[0022] Figure 5 This is a three-dimensional schematic diagram of Embodiment 3 of the present invention.

[0023] Reference numerals: 1. Frame; 2. Guide support wheel set; 3. Passive lifting structure; 3-1. Base; 3-2. Linkage rod; 3-3. Lifting bracket; 3-3-1. Rod body; 3-3-2. Support part; 3-4. Lifting roller; 4. Tilting and reset structure; 5. Pallet. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figure 1 As shown, a lifting and weighing sorting trolley includes a frame 1, a guide support wheel assembly 2, a passive lifting structure 3, and a load-bearing structure 4. The guide support wheel assembly 2 is installed at the bottom of the frame 1 and cooperates with the sorting machine track 2 to guide and support the sorting trolley 4. The passive lifting structure 3 is installed on the frame 1; the load-bearing structure 4 is installed on the passive lifting structure 3 and is used to carry and output goods.

[0027] like Figure 2 As shown, the passive lifting structure 3 includes a base 3-1, two connecting rods 3-2, a lifting bracket 3-3, and lifting rollers 3-4. The base 3-1 is fixed to the frame 1. One end of each of the two connecting rods 3-2 forms a revolute joint with two different positions on the base 3-1. The other end of each of the two connecting rods 3-2 forms a revolute joint with two different positions on the lifting bracket 3-3. The base 3-1, the two connecting rods 3-2, and the lifting bracket 3-3 form a parallelogram mechanism, allowing the lifting bracket 3-3 to only translate along a circular trajectory and preventing rotation. The frame 1 has a support surface that mates with the bottom of the lifting bracket 3-3. The support surface provides support for the lifting bracket 3-3 in its lower limit position. In the initial, non-weighing state, the lifting bracket 3-3 is supported on the support surface of the frame 1.

[0028] The lifting support 3-3 includes a rod body 3-3-1 and a support part 3-3-2. The top and bottom of the rod body 3-3-1 are connected to two connecting rods 3-2 respectively; the middle part of the support part 3-3-2 is fixed to the rod body 3-3-1 by bolts; lifting rollers 3-4 are rotatably connected to the bottom of the two outer sides of the support part 3-3-2.

[0029] like Figure 3 As shown, the lifting rollers 3-4 in the passive lifting structure 3 can cooperate with the top surface of the weighing platform set on the sorting machine track, so that the lifting bracket 3-3 is lifted. The specific process is as follows: the two lifting rollers 3-4 reach the position of the weighing platform as the sorting trolley moves and roll and support on the weighing platform; the weighing platform lifts the lifting rollers 3-4, thereby driving the lifting bracket 3-3 to rise.

[0030] After being raised, the lifting support 3-3 separates from the support surface on the frame 1, and the frame 1 can no longer provide support for the lifting support 3-3, the load-bearing structure 4, and the goods on the load-bearing structure 4. At this time, the pressure on the weighing platform can be detected to determine the total weight of the lifting support 3-3, the load-bearing structure 4, and the goods on the load-bearing structure 4, and then the weight of the goods can be calculated.

[0031] In some embodiments, the vertical component of the tension force exerted by the link 3-2 on the lifting bracket 3-3 can cause errors in the weighing of goods. Therefore, the link 3-2 is initially set to be tilted, specifically: the end of the link 3-2 connecting to the lifting bracket 3-3 is lower than the end of the link 3-2 connecting to the base 3-1; when the lifting roller 3-4 is on the weighing platform and lifted into position, it is horizontal, thereby eliminating the error caused by the vertical component of the tension force exerted by the link 3-2 on the lifting bracket 3-3. Furthermore, in other embodiments, error compensation can be performed by calculating the vertical component of the tension force exerted by the link 3-2 on the lifting bracket 3-3, which can also improve the detection accuracy.

[0032] Example 2

[0033] like Figure 4 As shown, a lifting and weighing sorting trolley is described. The difference between this embodiment and Embodiment 1 is that the supporting structure 4 is specifically designed as a belt conveyor structure. The belt conveyor structure includes a conveyor support, a driving roller, a driven roller, and a conveyor belt. The conveyor support is fixed to the top of the lifting support; the driving roller and the driven roller are respectively installed at both ends of the conveyor support. The driving roller and the driven roller are connected by the conveyor belt. The conveying direction of the conveyor belt is perpendicular to the travel direction of the sorting trolley.

[0034] Example 3

[0035] like Figure 5 As shown, a lifting and weighing sorting trolley is described. The difference between this embodiment and Embodiment 1 is that the supporting structure 4 is specifically set as a tilting structure. The tilting structure switches the pallet between a horizontal state carrying goods and an inclined state outputting goods by flipping the pallet.

Claims

1. A lifting and weighing sorting trolley, comprising a frame (1) and a load-bearing structure; characterized in that: It also includes a passive lifting structure (3); the passive lifting structure (3) includes a base (3-1), a lifting bracket (3-3) and a lifting support; the base (3-1) is mounted on the frame (1); the lifting bracket (3-3) is movably connected to the base (3-1); the lifting bracket (3-3) can raise and lower the base (3-1); the load-bearing structure is mounted on the lifting bracket (3-3); the lifting support is on the lifting bracket (3-3) or the load-bearing structure.

2. The lifting and weighing sorting trolley according to claim 1, characterized in that: The passive lifting structure (3) further includes a connecting rod (3-2); one end of the connecting rod (3-2) forms a rotating pair with the base (3-1); the other end of the connecting rod (3-2) forms a rotating pair with the lifting bracket (3-3); the base (3-1), the lifting bracket (3-3) and at least two connecting rods (3-2) form a parallelogram mechanism.

3. The lifting and weighing sorting trolley according to claim 2, characterized in that: The number of connecting rods (3-2) is two; the top of the base (3-1) is connected to the top of the lifting bracket (3-3) through the first connecting rod (3-2); the bottom of the base (3-1) is connected to the bottom of the lifting bracket (3-3) through the second connecting rod (3-2).

4. The lifting and weighing sorting trolley according to claim 2, characterized in that: In the initial state, the lifting bracket (3-3) is supported on the vehicle frame; in the weighing state, the lifting bracket (3-3) is separated from the vehicle frame; the lifting support is supported by the weighing platform.

5. The lifting and weighing sorting trolley according to claim 4, characterized in that: In the initial state, the connecting rod (3-2) is tilted; the end of the connecting rod (3-2) that connects to the lifting bracket (3-3) is lower than the end of the connecting rod (3-2) that connects to the base (3-1); under the weighing state, the connecting rod (3-2) is in a horizontal position.

6. The lifting and weighing sorting trolley according to claim 2, characterized in that: The lifting bracket (3-3) includes a rod body (3-3-1) and a support part (3-3-2); the connecting rod (3-2) is connected to the rod body (3-3-1); the middle part of the support part (3-3-2) is fixed to the rod body (3-3-1); lifting support members are installed at the bottom of the two outer sides of the support part (3-3-2).

7. The lifting and weighing sorting trolley according to claim 1, characterized in that: The frame (1) is provided with a support surface that cooperates with the bottom of the lifting bracket (3-3); in the initial state, the lifting bracket (3-3) is supported on the support surface of the frame (1).

8. The lifting and weighing sorting trolley according to claim 1, characterized in that: The lifting support is a lifting roller (3-4); the lifting roller (3-4) is rotatably connected to the lifting bracket (3-3) or the load-bearing structure.

9. The lifting and weighing sorting trolley according to claim 1, characterized in that: The aforementioned load-bearing structure adopts a tilting load-bearing structure; the tilting load-bearing structure includes a tilting and resetting structure and a tray; The tray is mounted on top of the flip-reset structure.

10. The lifting and weighing sorting trolley according to claim 1, characterized in that: The load-bearing structure adopts a belt conveyor structure; the belt conveyor structure includes a conveyor support, a drive roller, a driven roller, and a conveyor belt; the conveyor support is fixed on the top of the lifting support; the drive roller and the driven roller are respectively installed at both ends of the conveyor support; the drive roller and the driven roller are connected by the conveyor belt.

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