Spring lifting mechanism of full cop conveying trolley

Abstract

The utility model relates to the technical field of spinning bobbin transfer, in particular to a spring lifting mechanism of a full bobbin yarn transport trolley. Comprising a trolley body, and a lifting bottom plate is arranged in the trolley body; the lifting bottom plate is arranged on the trolley bottom face of the trolley body through two sets of cross arms, and the four sets of compression springs are arranged at the four corners between the lifting bottom plate and the trolley bottom face respectively. A structure for preventing a plate from deviating is fixed between the inner side arms of the two groups of cross arms, so that the spring lifting mechanism of the full bobbin yarn conveying trolley can adjust the height of the bearing platform through self-adaptive lifting according to different scenes and operation requirements, spinning bobbins can be loaded and unloaded at the optimal height, and the working efficiency is improved. And the traditional operation mode that a worker needs to frequently bend down for carrying is thoroughly changed, the labor intensity of the worker is greatly reduced, the occupational health problem possibly caused by long-time bending down operation is effectively reduced, and the effect of remarkably improving the spinning bobbin transfer efficiency is further achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of yarn tube transfer in spinning, and in particular to a spring lifting mechanism for a full-tube yarn transport trolley. Background Technology

[0002] A spinning frame is the main machine used in spinning. It is used to draft, twist, and wind semi-finished roving or sliver into fine yarn bobbins during the spinning process. The finished fine yarn bobbins need to be transported to the automatic winding machine station, where they are made into large-capacity yarns and defects are removed from the yarn so that they can be supplied to warping, weft feeding, or dyeing processes on looms.

[0003] In the traditional process of transferring full yarn tubes, the finished fine yarn tubes are first placed in baskets or bags by manual labor or a collective doffing elevator. Then, the baskets or bags are moved by manual labor to the feeding trolley at the automatic winding machine. The feeding trolley is pushed forward along the bottom guide rail of the automatic winding machine. When passing through each yarn bin, the operator puts the full yarn tubes into the yarn bin.

[0004] The disadvantages of the aforementioned bobbin transfer method are as follows: the baskets or bags have a small capacity, typically holding only 200-300 full bobbins each. When operators load the full bobbins into the winding machine's yarn magazine, the bending over required to retrieve them increases significantly. Furthermore, the process involves multiple trips between the collective doffing spinning machine and the automatic winding machine to transport the full bobbins. This frequent bending, loading, and transporting is extremely labor-intensive, leading to fatigue over long periods, impacting work efficiency and health. Existing transport trolleys have a fixed platform height, and the frequent bending and mismatched operating heights result in a time-consuming, cumbersome, and inefficient transfer process, affecting spinning production progress and increasing operating costs. Long-term, frequent bending during transport also increases the risk of back problems for workers, adding to labor costs and management burdens. Worker discomfort can also lead to decreased work efficiency and increased risk of workplace accidents, resulting in potential economic losses and safety risks.

[0005] Meanwhile, the existing transport trolley carrying platform adjusts the platform height by springs. However, the traditional spring lifting mechanism has problems such as unreliable spring limit structure, transportation vibration can easily cause the spring to be over-compressed or laterally misaligned, causing the mechanism to jam or the yarn tube to tip over. The spring fatigue fracture cycle is short, it is easy to be damaged and maintenance efficiency is low. In addition, the replacement of traditional springs requires a long calibration operation, which directly affects the continuity of the production line. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a spring lifting mechanism for a full-bore yarn transport trolley. This mechanism allows the height of the carrying platform to be adaptively adjusted according to different scenarios and operational needs, enabling the yarn bobbins to be loaded and unloaded at the most suitable height. This completely changes the traditional operating mode where workers need to frequently bend over to carry the yarn, significantly reducing the labor intensity of workers and effectively minimizing occupational health problems that may be caused by prolonged bending over. It also significantly improves the efficiency of yarn bobbin transport.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: it includes a trolley body, and a lifting base plate is provided inside the trolley body; the lifting base plate is connected to the bottom surface of the trolley body by two sets of cross arms, and four sets of compression springs are respectively arranged at the four corners between the lifting base plate and the bottom surface of the trolley; each of the upper and lower ends of the compression spring is provided with a spring positioning box, and the two spring positioning boxes are engaged after the compression spring is compressed; a limit circle is provided inside the spring positioning box, and the compression spring is locked outside the limit circle.

[0008] Furthermore, the mating surface of the spring positioning box is provided with a limiting outer edge, and the spring positioning box is provided with a position adjustment mechanism. The position adjustment mechanisms of the two upper and lower mating spring positioning boxes are respectively located in the front-back direction and the left-right direction.

[0009] Furthermore, the lifting base plate is provided with a lightweight support frame, and the cross arms are hinged between the lifting base plate and the bottom surface of the trolley through the lightweight support frame. At the same hinge point of each cross arm, a long slide plate is provided through a pin, and the long slide plate is connected to the lightweight support frame and the bottom surface of the trolley respectively.

[0010] Furthermore, the outer frame of the lightweight support frame for the lifting base plate is provided with a large hollow frame in the middle and small hollow frames on both sides. The spring positioning boxes of the four sets of compression springs are fixed on the small hollow frames, and the cross arms are fixed on the inner side of the outer frame.

[0011] Furthermore, a cross-shaped support is provided inside the large hollow frame.

[0012] Furthermore, the bottom surface of the trolley is provided with a hollow frame, and the upper and lower ends of the four sets of spring positioning boxes are respectively fixed to the lightweight support frame of the lifting base plate and the hollow frame of the trolley bottom surface.

[0013] Furthermore, the trolley body is composed of a trolley body support frame and trolley body surrounding panels.

[0014] Furthermore, the trolley body is equipped with four casters, which are located at the front, rear, and sides of the bottom of the trolley body.

[0015] Furthermore, the two casters located at the front and rear of the bottom of the trolley body are higher than the two casters located on both sides of the bottom of the trolley body.

[0016] Furthermore, an anti-displacement plate is fixed between the inner arms of the two sets of cross arms. The anti-displacement plate fastens the inner hinged arms of the two sets of cross arms to form a whole. The lifting base plate is set on the bottom surface of the trolley along the front and rear length direction through the two sets of cross arms.

[0017] The system includes a trolley body with an internal lifting base plate. The lifting base plate is connected to the bottom surface of the trolley body via two sets of cross arms. Four sets of compression springs are located at the four corners between the lifting base plate and the bottom surface of the trolley. Each compression spring has a spring positioning box at its upper and lower ends, and two spring positioning boxes are aligned behind the compression spring. Each spring positioning box has a limit circle inside, and the compression spring is locked outside the limit circle. This structure achieves precise positioning and load self-adaptation for the lifting of the full-tube yarn transport trolley, effectively suppresses base plate offset caused by transport vibration, reduces the risk of spring fatigue fracture, improves durability, supports quick replacement of spring components without calibration, reduces maintenance complexity, and ensures overall transport stability. Attached Figure Description

[0018] 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the spring lifting mechanism of the full-tube yarn transport trolley of this utility model;

[0020] Figure 2 This is a bottom view of the spring lifting mechanism of the full-tube yarn transport trolley of this utility model.

[0021] Figure 3 This is an internal schematic diagram of the spring lifting mechanism of the full-tube yarn transport trolley of this utility model;

[0022] Figure 4 This is a schematic diagram of the lightweight support frame for the lifting base plate of this utility model;

[0023] Figure 5This is a schematic diagram of the spring positioning box of this utility model in the engagement state;

[0024] Figure 6 This is a schematic diagram of the spring positioning box of this utility model;

[0025] Figure label:

[0026] Car body 1, Car body support frame 1-1, Car body surrounding panels 1-2, Casters 1-3

[0027] 2. Lifting base plate; 2-1. Lightweight support frame for lifting base plate; 3. Cross arm; 4. Cart bottom surface; 4-1. Hollow frame for car bottom surface; 5. Compression spring; 5. Spring positioning box; 5-1. Limiting circle; 5-2. Limiting outer edge; 5-3. Position adjustment mechanism; 5-4. Anti-deviation plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In the description of this utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] A spring lifting mechanism for a full-tube yarn transport trolley, such as Figures 1-6 As shown, the device includes a trolley body 1, inside which a lifting base plate 2 is provided; the lifting base plate 2 is connected to the bottom surface 4 of the trolley body 1 by two sets of cross arms 3, and four sets of compression springs 5 ​​are respectively arranged at the four corners between the lifting base plate 2 and the bottom surface 4 of the trolley; each of the upper and lower ends of the compression spring 5 is provided with a spring positioning box 5-1, and the two spring positioning boxes 5-1 are engaged after the compression spring 5 is compressed; a limit circle 5-2 is provided inside the spring positioning box 5-1, and the compression spring 5 is locked outside the limit circle 5-2.

[0031] Specifically, the lifting mechanism composed of the cross arm 3 and the compression spring 5 enables the adaptive height adjustment of the lifting base plate 2, allowing workers to reach the full yarn tubes at different depths without bending over. In actual use, as the full yarn tubes are gradually removed, the weight borne by the lifting base plate 2 decreases, and the compression spring 5, through the cross arm 3, slowly raises the lifting base plate 2 along with the removal of the full yarn tubes. Similarly, during the process of placing the full yarn tubes into the trolley before transfer, the lifting base plate 2 slowly lowers along with the placement progress. Four sets of compression springs 5 ​​are distributed at the four corners between the lifting base plate 2 and the bottom surface 4 of the trolley to ensure that the lifting base plate 2 does not tilt, maintaining the overall flatness of the lifting base plate 2 and the full yarn tubes it carries. The lifting mechanism features stable lifting. The spring fixing function and stroke limiting function are integrated into the same component through the spring positioning box 5-1. The end face contact after the upper and lower spring positioning boxes 5-1 are engaged directly limits the minimum compression height of spring 5 and the minimum height of the lifting base plate 2. No additional limiting structure is required, simplifying the mechanism. The limiting circle 5-2 engages with the outer diameter of the spring to prevent the spring from shifting laterally, improving the stability of the lifting process and reducing the risk of spring fatigue fracture. Furthermore, the spring is pre-compressed to the lowest point of the working stroke by the upper and lower spring positioning boxes 5-1 during installation, so it does not need to be installed at its free length. At the same time, spring replacement does not require disassembling the entire lifting mechanism; only the spring positioning box 5-1 needs to be separated for quick spring replacement.

[0032] As a preferred embodiment of the above, such as Figures 1-6 As shown, the mating surface of the spring positioning box 5-1 is provided with a limiting outer edge 5-3, and the spring positioning box 5-1 is provided with a position adjustment mechanism 5-4. The position adjustment mechanisms 5-4 of the two upper and lower mating spring positioning boxes 5-1 are respectively located in the front-back direction and the left-right direction.

[0033] Specifically, the position adjustment mechanism 5-4, which is set separately in the front-back and left-right directions, realizes the bidirectional independent adjustment of the spring preload, thereby compensating for the error of the trolley body 1 or the lifting base plate 2, and avoiding tilting and jamming caused by insufficient spring preload on one side. A limiting outer edge 5-3 is added to the mating surface of the spring positioning box 5-1 to increase the mating area, preventing the upper and lower positioning boxes 5-1 from lateral misalignment due to vibration or impact when the spring is compressed to the lowest point, ensuring the reliability of the limit. Since the position adjustment mechanism 5-4 and the limiting outer edge 5-3 are integrated into the spring positioning box 5-1, rather than being an independent additional structure, the number of parts is reduced, the assembly complexity is reduced, and the weight is further reduced, reducing the lifting burden on the lifting base plate 2.

[0034] As a preferred embodiment of the above, such as Figures 1-6As shown, the lifting base plate 2 is provided with a lightweight support frame 2-1. The cross arms 3 are hinged between the lifting base plate 2 and the trolley bottom surface 4 through the lightweight support frame 2-1. At the same hinge point of each cross arm 3, a long sliding groove plate is provided through a pin. The long sliding groove plate connects the lightweight support frame 2-1 and the trolley bottom surface 4 respectively.

[0035] Specifically, by setting up a lightweight support frame 2-1 for the lifting base plate, the cross arm 3 and the compression spring 5 are fixed between the lifting base plate 2 and the bottom surface 4 of the trolley through this frame. Compared with a direct connection, the support frame can distribute the force from the cross arm 3 and the spring positioning box 5-1 more evenly to the lifting base plate 2, reducing local stress concentration and improving the stability of the entire lifting structure. The support frame forms an integral structure that can better resist lateral forces. During the transfer process, the trolley may be subjected to collisions or bumps, generating lateral forces. The support frame can prevent the lifting base plate 2 from shifting or tilting due to lateral forces, ensuring the smooth operation of the lifting base plate 2. The lightweight support frame 2-1 for the lifting base plate adopts a lightweight design, effectively reducing its own weight while ensuring structural strength. To prevent the excessively heavy support frame from increasing the load on the compression spring 5 and reducing the sensitivity and stability of lifting, the coordinated design of the lightweight support frame and the spring positioning box 5-1 allows the compression spring 5 to more efficiently utilize its elastic potential energy when carrying a full yarn tube, enabling the lifting base plate 2 to lift smoothly and quickly, thus improving the overall working efficiency of the transport trolley. Furthermore, the application of the lightweight support frame reduces the overall weight of the trolley, reducing the force required for workers to push it, further alleviating the workers' pushing burden and improving the convenience of transportation.

[0036] As a preferred embodiment of the above, such as Figures 1-6 As shown, the outer frame of the lightweight support frame 2-1 for the lifting base plate has a large hollow frame in the middle and small hollow frames on both sides. The four sets of spring positioning boxes 5-1 are fixed on the small hollow frames, and the cross arms 3 are fixed on the inner side of the outer frame.

[0037] As a preferred embodiment of the above, such as Figures 1-6 As shown, a cross-shaped support is provided inside the large hollow frame.

[0038] Specifically, the lightweight support frame 2-1 for the lifting base plate adopts a design combining a large hollow frame in the middle of the outer frame with small hollow frames on both sides. This multi-layered hollow structure, while ensuring the overall structural strength of the frame, minimizes the weight of the support frame and reduces the load on the compression springs 5, making the lifting process more sensitive and efficient. It also reduces the physical effort required for workers to push the trolley, achieving a synergy between structural optimization and lightweighting. Four sets of compression springs 5 ​​are fixed to the small hollow frames, and the cross arms 3 are fixed to the inner side of the outer frame. The compression springs 5 ​​are fixed to the small hollow frames, allowing for more direct transmission of power. The elastic force is transmitted to achieve smooth lifting of the lifting base plate 2; the cross arm 3 is fixed inside the outer frame to ensure its stability and reliability during the lifting process. The two work together to optimize the structure of the entire lifting mechanism. The cross support is set in the large hollow frame to effectively enhance the structural strength of the large hollow frame. The cross support can disperse and transmit forces from different directions to prevent the large hollow frame from deforming or being damaged when under force. It not only improves the overall stability of the support frame, but also provides more reliable support for the lifting base plate 2, ensuring the safety of the full yarn tube during transportation.

[0039] As a preferred embodiment of the above, such as Figures 1-6 As shown, the bottom surface 4 of the trolley is provided with a hollow frame 4-1, and the upper and lower ends of the four sets of spring positioning boxes 5-1 are respectively fixed on the lightweight support frame 2 of the lifting base plate and the hollow frame 4-1 of the trolley bottom.

[0040] Specifically, a hollow frame 4-1 is installed on the bottom of the trolley, and four sets of spring positioning boxes 5-1 are fixed at their upper and lower ends to the lightweight support frame 2 of the lifting base plate and the hollow frame 4-1, respectively. The hollow frame 4-1 reduces the weight of the trolley's bottom, thus lowering the overall weight. The compression spring 5, as a key component connecting the lightweight support frame 2 of the lifting base plate and the hollow frame 4-1, enables the elastic lifting function of the lifting base plate 2. By fixing the spring positioning boxes 5-1 between the two frames, the internal space of the trolley is fully utilized, making the structure more compact. The design of the hollow frame 4-1 reduces the amount of material used, lowering the manufacturing cost of the trolley. At the same time, the standardized design and mass production of the compression spring 5 also reduces its procurement cost.

[0041] As a preferred embodiment of the above, such as Figures 1-6 As shown, the trolley body 1 is supported by the trolley body.

[0042] The supporting frame 1-1 and the four sides of the trolley body form 1-2.

[0043] Specifically, by combining the support frame with the hollow design of the panel, the overall weight is further reduced while ensuring structural strength, thus improving the flexibility and transportation efficiency of the vehicle.

[0044] As a preferred embodiment of the above, such as Figures 1-6 As shown, the trolley body 1 is equipped with four casters 1-3, which are located at the front, back and sides of the bottom of the trolley body 1.

[0045] As a preferred embodiment of the above, such as Figures 1-6 As shown, the two casters 1-3 located at the front and rear of the bottom of the trolley body 1 are higher than the two casters 1-3 located on both sides of the bottom of the trolley body 1.

[0046] Specifically, the front and rear casters 1-3 at the bottom are swivel casters, while the side casters 1-3 are fixed casters. The height of the front and rear casters 1-3 at the bottom of the trolley body 1 is about 10mm higher than that of the side casters 1-3, which not only meets the stability requirements of the trolley during the transportation of full yarn tubes, but also enables flexible steering.

[0047] As a preferred embodiment of the above, such as Figures 1-6 As shown, an anti-displacement plate 6 is fixed between the inner arms of the two sets of cross arms 3. The anti-displacement plate 6 fastens the inner hinged arms of the two sets of cross arms 3 to form a whole. The lifting base plate 2 is set on the bottom surface 4 of the trolley along the front and rear length direction through the two sets of cross arms 3.

[0048] Specifically, by setting two sets of cross arms 3 along the length of the bottom surface 4 of the trolley, the lifting base plate 2 not only achieves a compact longitudinal layout inside the trolley, but also maximizes the distance between the hinge point and the slide connection point of the lifting base plate 2, enhancing the load-bearing capacity of the lifting base plate 2. At the same time, it avoids the problem of excessive width occupation caused by the traditional transverse arrangement, making the trolley thinner in the width direction, which is convenient for flexible movement in narrow passages or dense equipment areas.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spring lifting mechanism for a full-bore yarn transport trolley, characterized in that: Includes a trolley body (1), and a lifting base plate (2) is provided inside the trolley body (1). The lifting base plate (2) is connected to the bottom surface (4) of the trolley body (1) by two sets of cross arms (3), and four sets of compression springs (5) are respectively located at the four corners between the lifting base plate (2) and the bottom surface (4) of the trolley. The compression spring (5) is provided with spring positioning boxes (5-1) at both the upper and lower ends, and the two spring positioning boxes (5-1) are engaged after the compression spring (5) is compressed. The spring positioning box (5-1) is provided with a limit circle (5-2) inside, and the compression spring (5) is locked outside the limit circle (5-2).

2. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 1, characterized in that, The spring positioning box (5-1) has a limiting outer edge (5-3) on its mating surface. The spring positioning box (5-1) is provided with a position adjustment mechanism (5-4). The position adjustment mechanisms (5-4) of the two upper and lower mating spring positioning boxes (5-1) are respectively located in the front-back direction and the left-right direction.

3. The spring lifting mechanism for a full-bore yarn transport trolley according to claim 1, characterized in that, The lifting base plate (2) is provided with a lightweight support frame (2-1). The cross arm (3) is hinged between the lifting base plate (2) and the bottom surface of the trolley (4) through the lightweight support frame (2-1). At the same hinge point of each cross arm (3), a long slide plate is provided through a pin. The long slide plate is connected to the lightweight support frame (2-1) and the bottom surface of the trolley (4) respectively.

4. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 3, characterized in that, The outer frame of the lightweight support frame (2-1) of the lifting base plate is provided with a large hollow frame in the middle and small hollow frames on both sides. The spring positioning boxes (5-1) of the four sets of compression springs (5) are fixed on the small hollow frames, and the cross arms (3) are fixed on the inner side of the outer frame.

5. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 4, characterized in that, The large hollow frame is equipped with cross-shaped supports.

6. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 4, characterized in that, The bottom surface (4) of the trolley is provided with a hollow frame (4-1) for the bottom surface of the trolley. The upper and lower ends of the four sets of spring positioning boxes (5-1) are respectively fixed on the lightweight support frame (2-1) of the lifting base plate and the hollow frame (4-1) for the bottom surface of the trolley.

7. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 1, characterized in that, The trolley body (1) is composed of a trolley body support frame (1-1) and trolley body surrounding panels (1-2).

8. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 1, characterized in that, The trolley body (1) is equipped with four casters (1-3), which are located at the front, back and sides of the bottom of the trolley body (1). The casters (1-3) on the sides are fixed casters, and the casters (1-3) at the front and back are swivel casters.

9. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 8, characterized in that, The two casters (1-3) located at the front and rear of the bottom of the trolley body (1) are higher than the two casters (1-3) located on both sides of the bottom of the trolley body (1).

10. The spring lifting mechanism of a full-bore yarn transport trolley according to claim 1, characterized in that, An anti-deviation plate (6) is fixed between the inner arms of the two sets of cross arms (3). The anti-deviation plate (6) fastens the inner hinge arms of the two sets of cross arms (3) to form a whole. The lifting base plate (2) is set on the bottom surface (4) of the trolley along the front and rear length direction through the two sets of cross arms (3).

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