An adjustable pre-tensioning combined spring member

Abstract

The application relates to the technical field of spring components, in particular to a combined spring component capable of adjusting pre-tightening force, which comprises a main body frame, an elastic unit group and an adjusting assembly. The elastic unit group is composed of a plurality of elastic units with increasing rigidity in series connection, and the adjusting assembly comprises an adjusting screw rod, an adjusting sleeve and a driving mechanism. The adjusting screw rod is axially moved by rotating a hand wheel, the adjusting sleeve is displaced along a guide groove, and a pressing block exerts pressure on the elastic unit group to realize phased adjustment of the pre-tightening force. The bottom of the main body frame is provided with a mounting base, so that the combined spring component is convenient to fix and adapt to different environments. The application can quickly and conveniently adjust the spring pre-tightening force, improves flexibility and adaptability, and has high practical value.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical structure and elastic element technology, specifically a combined spring component with adjustable preload. Background Technology

[0002] Spring components are common mechanical elements widely used in various mechanical equipment, primarily for providing elastic support, shock absorption, or energy storage. Depending on the application requirements, springs come in various types and structural forms, such as compression springs, tension springs, and torsion springs. In practical applications, certain scenarios demand high preload from the spring. However, traditional spring components typically adjust their performance by changing the spring's material, diameter, or number of coils, making it difficult to achieve quick and convenient preload adjustment.

[0003] Chinese patent document CN215796171 U discloses a material rack, including casters, a bottom frame, a top frame, crossbars, and a curtain. The bottom frame is provided with support columns around its four sides, and the top frame is installed on the top of the support columns to form a frame. Multiple crossbars are arranged sequentially at both ends of the top of the bottom frame, and the multiple crossbars at the top ends correspond to each other. Each pair of crossbars has a shelf, and the top pair of crossbars has a top shelf. Protective pads are provided on both sides and the back of the frame, and outer frames are provided on the protective pads on both sides and the back of the frame. The bottom frame, support columns, and top frame are fixed by the outer frames. A curtain is installed on the front of the frame. When using the material rack, the workpiece is placed on the shelf, and the trolley is pushed to move through the casters to transport the workpiece.

[0004] While the aforementioned technologies can meet basic material transportation needs, the limitations of traditional spring components become apparent when scenarios requiring flexible adjustment of stress states arise. For example, in certain precision equipment, the preload of the spring needs to be dynamically adjusted according to actual working conditions. However, existing technologies often require replacing the spring or reprocessing parts to achieve this, resulting in complex operation and low efficiency. This adjustment method not only increases maintenance costs but may also affect the overall operational stability of the equipment. Utility Model Content

[0005] This invention provides a combined spring component with adjustable preload, aiming to solve the problem that traditional spring components in the prior art are difficult to adjust the preload quickly and conveniently. In practical applications, some precision equipment requires dynamic adjustment of the spring preload, while traditional springs usually achieve performance adjustment by replacing or reprocessing parts. This method is not only complex and inefficient, but may also lead to a decrease in the stability of equipment operation.

[0006] This utility model discloses a combined spring component with adjustable preload, comprising a main frame, an elastic unit group disposed within the main frame, and an adjusting assembly for adjusting the preload of the elastic unit group. The elastic unit group consists of multiple independent elastic units, each including a helical spring segment and connecting ends fixedly connected to both ends of the helical spring segment. The adjusting assembly includes an adjusting screw, an adjusting sleeve threadedly engaged with the adjusting screw, and a driving mechanism for rotating the adjusting screw.

[0007] The main frame is a rectangular frame structure with multiple mounting slots along its length. Each mounting slot contains a set of elastic units. The elastic units in each set are connected in series via connecting ends and fixedly connected to the sidewall of the mounting slot via the connecting ends. The adjusting screw passes through one sidewall of the main frame and extends to the outside of the other sidewall, with the axis of the adjusting screw parallel to the length direction of the elastic unit set. The adjusting sleeve is fitted onto the adjusting screw and located inside the main frame, with the outer circumference of the adjusting sleeve contacting the middle position of the elastic unit set.

[0008] The drive mechanism includes a handwheel fixed to the outside of the main frame and a transmission gear coaxially connected to the handwheel. One end of the adjusting screw is provided with a rack segment that meshes with the transmission gear. When the handwheel rotates, the transmission gear drives the rack segment to move, thereby driving the adjusting screw to move axially. The movement of the adjusting screw pushes the adjusting sleeve to move axially, and the displacement of the adjusting sleeve further compresses or releases the elastic unit group, thereby changing the preload of the elastic unit group.

[0009] The main frame has guide grooves on both side walls, and the two ends of the adjusting sleeve are respectively embedded in the guide grooves to restrict the radial movement of the adjusting sleeve and ensure that it can only move axially. The outer circumferential surface of the adjusting sleeve is provided with multiple clamping blocks corresponding to the elastic unit groups, each clamping block contacting the middle position of an elastic unit group. When the adjusting sleeve moves axially, the clamping blocks apply pressure to the elastic unit groups, thereby adjusting the preload of the elastic unit groups.

[0010] The helical spring segments of each elastic unit in the elastic unit group are made of steel wires of different diameters, and the stiffness values ​​of the helical spring segments of adjacent elastic units are distributed in an increasing manner. With this design, when pressure is applied by the adjusting sleeve, the elastic units with lower stiffness deform first, while the elastic units with higher stiffness only begin to work under greater pressure, thereby achieving the effect of adjusting the preload in stages.

[0011] The main frame has a mounting base at its bottom, with multiple mounting holes for fixing the main frame to an external device. The mounting base and the main frame are connected by bolts, and the tightness of the bolts can be finely adjusted using an adjustment tool to suit different installation environments.

[0012] Beneficial Effects: Through the design of the above structure, this utility model realizes a combined spring component with adjustable preload. Specifically, when the preload needs to be adjusted, the operator rotates the handwheel, which drives the adjusting screw to move axially via the transmission gear. The movement of the adjusting screw pushes the adjusting sleeve to move along the guide groove. The displacement of the adjusting sleeve applies pressure to the elastic unit group through the clamping block, thereby changing the overall preload of the elastic unit group. Since the stiffness values ​​of each elastic unit in the elastic unit group are distributed in an increasing manner, the preload can be changed in stages during the adjustment process to meet the needs of different working conditions. In addition, the modular design of the main frame makes the entire spring component easy to disassemble and maintain, and the adjustability of the mounting base also enhances its applicability.

[0013] In summary, this utility model solves the problem of inconvenient preload adjustment of traditional spring components by the synergistic effect of the adjustment component and the elastic unit group, while improving the flexibility and adaptability of the spring components, and has high practical value and promotion significance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention, showing the layout relationship of the main frame, elastic unit group, adjustment component and drive mechanism, wherein the adjustment screw passes through the main frame and cooperates with the adjustment sleeve.

[0015] Figure 2 This is a side sectional view of the present invention, which focuses on showing the contact method between the adjusting sleeve and the elastic unit group, as well as the limiting effect of the guide groove on the adjusting sleeve, and also shows the correspondence between the clamping block and the elastic unit group.

[0016] Figure 3 This is a partial enlarged view of the elastic unit group of this utility model, which shows in detail the series connection method of the elastic units and the diameter variation design of the helical spring segment.

[0017] The attached figures are labeled as follows:

[0018] 1. Main frame; 2. Elastic unit group; 3. Adjusting screw; 4. Adjusting sleeve; 5. Drive mechanism;

[0019] 6. Handwheel; 7. Transmission gear; 8. Guide groove; 9. Clamping block; 10. Mounting base. Detailed Implementation

[0020] The specific implementation of a combined spring component with adjustable preload according to this utility model is described in detail with reference to the accompanying drawings. Figure 1 This is a schematic diagram of the overall structure, showing the layout relationship of the main frame 1, the elastic unit group 2, the adjustment component and the drive mechanism 5; Figure 2 The side sectional view highlights the contact method between the adjusting sleeve 4 and the elastic unit group 2, as well as the limiting effect of the guide groove 8 on the adjusting sleeve 4. Figure 3 This is a partial enlarged view of elastic unit group 2, which shows in detail the series connection method of the elastic units and the design of the diameter variation of the helical spring segment.

[0021] The main frame 1 adopts a rectangular frame structure with multiple mounting slots along its length for fixing the elastic unit group 2. Each elastic unit group 2 consists of multiple independent elastic units, each including a helical spring segment and connecting ends fixedly connected to both ends of the helical spring segment. These elastic units are connected in series via the connecting ends and fixedly connected to the sidewalls of the mounting slots. The helical spring segment of each elastic unit in the elastic unit group 2 is made of steel wire of different diameters, and the stiffness values ​​of the helical spring segments of adjacent elastic units increase progressively. This progressive distribution design ensures that during adjustment, the elastic units with lower stiffness deform first, while the elastic units with higher stiffness only begin to work under greater pressure, thus achieving the effect of staged adjustment of the preload.

[0022] The adjusting assembly includes an adjusting screw 3, an adjusting sleeve 4 threadedly engaged with the adjusting screw 3, and a drive mechanism 5 for rotating the adjusting screw 3. The adjusting screw 3 passes through one side wall of the main frame 1 and extends to the outside of the other side wall, with its axis parallel to the length direction of the elastic unit group 2. The adjusting sleeve 4 is fitted onto the adjusting screw 3 and is located inside the main frame 1. Multiple clamping blocks 9 are provided on the outer circumferential surface of the adjusting sleeve 4, each clamping block 9 contacting the middle position of an elastic unit group 2. When the adjusting sleeve 4 moves axially, the clamping blocks 9 apply pressure to the elastic unit group 2, thereby changing the overall preload of the elastic unit group 2. Guide grooves 8 are provided on both side walls of the main frame 1, and both ends of the adjusting sleeve 4 are respectively embedded in the guide grooves 8 to restrict the radial movement of the adjusting sleeve 4, ensuring that it can only move axially.

[0023] The drive mechanism 5 includes a handwheel 6 fixed to the outside of the main frame 1 and a transmission gear 7 coaxially connected to the handwheel 6. One end of the adjusting screw 3 is provided with a rack segment that meshes with the transmission gear 7. When the operator rotates the handwheel 6, the transmission gear 7 drives the rack segment to move, thereby driving the adjusting screw 3 to move axially. The movement of the adjusting screw 3 pushes the adjusting sleeve 4 to move along the guide groove 8. The displacement of the adjusting sleeve 4 further compresses or releases the elastic unit group 2, thereby changing the preload of the elastic unit group 2. The above adjustment process is achieved through mechanical transmission, ensuring a smooth and reliable adjustment process.

[0024] The main frame 1 has a mounting base 10 at its bottom, with multiple mounting holes for fixing the main frame 1 to an external device. The mounting base 10 is connected to the main frame 1 by bolts, and the tightness of the bolts can be finely adjusted using an adjustment tool to suit different installation environments. This modular design makes the entire spring assembly easy to disassemble and maintain, while also enhancing its applicability.

[0025] In practical applications, when adjusting the preload, the operator first rotates the handwheel 6. The handwheel 6 drives the adjusting screw 3 axially via the transmission gear 7. The movement of the adjusting screw 3 pushes the adjusting sleeve 4 along the guide groove 8. This displacement of the adjusting sleeve 4 applies pressure to the elastic unit group 2 via the clamping block 9, thereby changing the overall preload of the elastic unit group 2. Since the stiffness values ​​of each elastic unit in the elastic unit group 2 are distributed in an increasing manner, staged changes in preload can be achieved during adjustment to meet the needs of different working conditions. For example, in a certain application scenario, if a lower preload is required in the initial stage, only a slight rotation of the handwheel 6 is needed to apply pressure to the elastic unit with lower stiffness using the adjusting sleeve 4. In subsequent stages, if a further increase in preload is required, the handwheel 6 is rotated to engage the elastic unit with higher stiffness, thus achieving a higher preload level.

[0026] Furthermore, the modular design of the main frame 1 makes the entire spring assembly easy to disassemble and maintain. For example, when a part of the elastic unit is damaged or its performance degrades, that part of the elastic unit can be replaced individually without replacing the entire spring assembly. This design not only reduces maintenance costs but also improves the operational stability of the equipment. The adjustability of the mounting base 10 also enhances its applicability, allowing for flexible adjustments to meet the needs of different installation environments.

[0027] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the implementation principle of this utility model is provided in conjunction with specific application scenarios.

[0028] In a certain precision mechanical device, the preload of the spring components needs to be dynamically adjusted according to the working conditions to maintain its operational stability. The operator first fixes the main frame 1 to the device using the mounting base 10. Multiple mounting holes on the mounting base 10 are used to accommodate the connection requirements of external equipment. If there are deviations in the installation environment of the external equipment, the position of the mounting base 10 can be fine-tuned by adjusting the tightness of the bolts, thereby ensuring precise alignment between the main frame 1 and the device. This step provides a stable installation foundation for the subsequent normal operation of the spring components.

[0029] Subsequently, the operator rotates handwheel 6, which drives transmission gear 7 to rotate. Transmission gear 7, through meshing with rack segment, drives adjusting screw 3 to move axially. The movement of adjusting screw 3 pushes adjusting sleeve 4 to move along guide groove 8. At this time, both ends of adjusting sleeve 4 are embedded in guide groove 8, restricting its radial movement and ensuring the smoothness of the displacement process. Multiple clamping blocks 9 are provided on the outer circumferential surface of adjusting sleeve 4. When adjusting sleeve 4 moves axially, clamping blocks 9 apply pressure to elastic unit group 2. Since the stiffness values ​​of each elastic unit in elastic unit group 2 are distributed in an increasing manner, in the initial stage, elastic units with smaller stiffness deform first, while elastic units with larger stiffness only begin to work under greater pressure. This design makes the change of preload present a staged effect, meeting the dynamic adjustment needs under different working conditions.

[0030] For example, under a low-load condition, the operator only needs to slightly rotate the handwheel 6 to apply pressure to the less stiff elastic element using the adjusting sleeve 4 to achieve the required preload level. Under a high-load condition, further rotation of the handwheel 6 displaces the adjusting sleeve 4, causing the clamping block 9 to apply greater pressure to the elastic element group 2, thus engaging the more stiff elastic element and achieving a higher preload level. This process is accomplished through mechanical transmission, ensuring the accuracy and reliability of the adjustment.

[0031] Furthermore, when a portion of the elastic unit experiences performance degradation or damage due to prolonged use, the operator can remove the connecting bolts between the main frame 1 and the mounting base 10, remove the elastic unit group 2 from the mounting slot, and replace the damaged elastic unit individually. Since the elastic units in the elastic unit group 2 are connected in series via connecting ends, and each elastic unit is independently designed, there is no need to replace the entire spring assembly, reducing maintenance costs. Simultaneously, the modular design allows the reinstalled spring assembly to quickly return to normal operating conditions, minimizing equipment downtime.

[0032] In practical applications, the above adjustment process can also be automated by combining external sensors. For example, during equipment operation, external sensors monitor the stress state of the spring components in real time and feed the data back to the control system. The control system calculates the required preload value according to a preset algorithm and automatically rotates the handwheel 6 via a motor, thereby achieving dynamic adjustment of the preload of the spring components. This automated control method further enhances the intelligence level of the equipment while reducing the need for manual intervention.

[0033] In summary, this invention achieves phased adjustment of the preload through the synergistic effect of the adjusting component and the elastic unit group 2, meeting the dynamic requirements under different working conditions. Simultaneously, the modular design and the introduction of the adjustable mounting base 10 significantly improve the applicability and maintenance convenience of the spring component, demonstrating high practical value.

Claims

1. A combined spring component with adjustable preload, comprising a main frame, an elastic unit group disposed within the main frame, and an adjusting assembly for adjusting the preload of the elastic unit group, characterized in that, The elastic unit group consists of multiple independent elastic units. Each elastic unit includes a helical spring segment and connecting ends fixedly connected to both ends of the helical spring segment. The adjustment assembly includes an adjustment screw, an adjustment sleeve threaded with the adjustment screw, and a drive mechanism for driving the adjustment screw to rotate. The adjustment screw passes through one side wall of the main frame and extends to the outside of the other side wall. The axis of the adjustment screw is parallel to the length direction of the elastic unit group. The adjustment sleeve is sleeved on the adjustment screw and located inside the main frame. The outer circumferential surface of the adjustment sleeve contacts the middle position of the elastic unit group.

2. The adjustable preload combined spring component according to claim 1, characterized in that, The drive mechanism includes a handwheel fixed to the outside of the main frame and a transmission gear coaxially connected to the handwheel. One end of the adjusting screw is provided with a rack segment that meshes with the transmission gear.

3. The adjustable preload combined spring component according to claim 1, characterized in that, Guide grooves are provided on both sides of the main frame, and the two ends of the adjusting sleeve are respectively embedded in the guide grooves to restrict the radial movement of the adjusting sleeve. Multiple clamping blocks corresponding to the elastic unit group are provided on the outer peripheral surface of the adjusting sleeve, and each clamping block is in contact with the middle position of an elastic unit group.

4. A combined spring component with adjustable preload according to claim 1, characterized in that, The helical spring segment of each elastic unit in the elastic unit group is made of steel wire of different diameters, and the stiffness value of the helical spring segment of adjacent elastic units is distributed in an increasing manner.

5. A combined spring component with adjustable preload according to claim 1, characterized in that, The bottom of the main frame is provided with a mounting base, which has multiple mounting holes for fixing the main frame to an external device. The mounting base and the main frame are connected by bolts.

6. A combined spring component with adjustable preload according to claim 1, characterized in that, Each elastic unit in the elastic unit group is connected in series through a connecting end, and is fixedly connected to the side wall of the mounting groove inside the main frame through the connecting end.

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