A spring force adjusting mechanism for reducing spring wear and a pressure maintaining device using the same

Abstract

This utility model discloses a spring force adjustment mechanism for reducing spring wear and a pressure-holding device using the same. The mechanism includes a spring and a spring force adjustment assembly. The spring force adjustment assembly includes a pressure adjusting component and a sleeve. The pressure adjusting component is rotatably and vertically connected to the upper part of the sleeve. One end of the spring is connected to the lower part of the sleeve, and the other end extends out of the sleeve and connects to the component to be pressure-held. A contact block is provided between the pressure adjusting component and the spring. The bottom surface of the contact block abuts against the spring, and the top surface of the contact block abuts against the bottom surface of the pressure adjusting component. A first placement position is provided on the top surface of the contact block, and a second placement position is provided on the bottom surface of the pressure adjusting component. The first and second placement positions correspondingly form a receiving cavity. A steel ball is placed in the receiving cavity with a clearance fit. When the pressure adjusting component adjusts the spring preload, the steel ball applies pressure evenly to the contact block. This utility model achieves a significant reduction in spring wear and precise control of the preload.

Description

Technical Field

[0001] This utility model relates to the field of pressure adjustment technology, and in particular to a spring force adjustment mechanism for reducing spring wear and a pressure holding device using the same. Background Technology

[0002] The pressure adjustment mechanism of the existing pressure holding device adjusts the pressure of the entire system by rotating the adjusting component to compress or release the spring and change the preload. In this mechanical adjustment mechanism, the adjusting component is in direct contact with the spring during the lifting and lowering process. As the adjusting component rotates, the contact part with the spring is constantly sliding and rubbing, which makes the bottom of the adjusting component and the spring prone to wear. Once wear occurs, it will affect the accuracy of the spring force adjustment, so it is necessary to stop the machine and replace the parts to avoid affecting the pressure holding effect. Utility Model Content

[0003] To achieve the above objectives, this utility model provides a spring force adjustment mechanism that reduces spring wear, thereby significantly reducing wear and extending the service life of the adjustment mechanism while adjusting the pressure.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A spring force adjustment mechanism for reducing spring wear includes a spring and a spring force adjustment assembly. The spring force adjustment assembly includes a pressure adjusting component and a sleeve. The pressure adjusting component is rotatably and vertically connected to the upper part of the sleeve. One end of the spring is connected to the lower part of the sleeve, and the other end of the spring extends out of the sleeve and connects to a component to be pressure-held. An abutment block is provided between the pressure adjusting component and the spring. The bottom surface of the abutment block abuts against the spring, and the top surface of the abutment block abuts against the bottom surface of the pressure adjusting component. A first placement position is provided on the top surface of the abutment block, and a second placement position is provided on the bottom surface of the pressure adjusting component. The first placement position and the second placement position correspondingly form a receiving cavity. A steel ball is placed in the receiving cavity, and the steel ball is clearance-fitted with the receiving cavity. When the pressure adjusting component adjusts the spring preload, the steel ball applies pressure evenly to the abutment block.

[0006] In a preferred embodiment, the pressure regulating member includes, from top to bottom, an adjusting part, a rod body, and an abutting part. The rod body connects the adjusting part and the abutting part. The abutting part abuts against the abutting block. The second placement position is located on the side of the abutting part facing the abutting block.

[0007] In a preferred embodiment, the outer side of the adjustment part is provided with tooth-shaped ridges, and the adjustment part is provided with through holes.

[0008] In a preferred embodiment, the adjusting part is connected to the motor.

[0009] In a preferred embodiment, a pressure sensor is also connected between the spring and the component to be pressure-held.

[0010] In a preferred embodiment, the top of the sleeve is provided with an anti-disengagement locking component, which is used to prevent the pressure regulating component from disengaging.

[0011] In a preferred embodiment, a viewing window is provided on the outer side of the sleeve, and a scale value is provided on one side of the viewing window.

[0012] In a preferred embodiment, a guide fixing block is connected to the bottom of the sleeve, and a connecting hole is provided on the guide fixing block. The spring passes through the connecting hole and is sleeved with the sleeve.

[0013] This utility model also provides a pressure-holding device that uses the above-mentioned elastic force adjustment mechanism to reduce spring wear.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model's elastic adjustment mechanism separates the pressure regulating component from the abutment block and employs rolling contact with steel balls. The separate design of the abutment block and pressure regulating component, with the spring contacting the bottom of the abutment block, prevents sliding friction with the pressure regulating component. Instead, compression or release occurs under the action of the abutment block and steel balls, significantly reducing wear. The abutment block, acting as an intermediate component, further absorbs vibration energy, reducing fretting wear with the spring end. The steel balls roll within the receiving cavity, limiting the radial displacement of the pressure regulating component through the cavity sidewalls, ensuring the movement trajectory coincides with the axis, improving pressure control accuracy, and automatically aligning the pressure direction to avoid lateral force transmission. This achieves synergy between elastic adjustment and stress dispersion design. This utility model significantly reduces spring wear and precisely controls preload. Attached Figure Description

[0016] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0017] Figure 1 This is a schematic diagram of the elasticity adjustment mechanism of this utility model;

[0018] Figure 2 Exploded view of the elastic adjustment mechanism;

[0019] Figure 3 This is a schematic diagram of a pressure regulating component;

[0020] Figure 4 This is a schematic diagram of a pressure-holding device that utilizes an elastic adjustment mechanism. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0022] In the description of this utility model, it should be understood that the terms "first", "second", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1 , Figure 2 The spring force adjustment mechanism shown includes a spring 100 and a spring force adjustment assembly 200. The spring force adjustment assembly 200 includes a pressure adjusting component 210 and a sleeve 220. The pressure adjusting component 210 is rotatably and vertically connected to the upper part of the sleeve 220. One end of the spring 100 is connected to the lower part of the sleeve 220, and the other end of the spring 100 extends out of the sleeve 220 and is connected to the component to be pressure-held. An abutment block 230 is provided between the pressure adjusting component 210 and the spring 100. The bottom surface of the abutment block 230 abuts against the spring 100, and the top surface of the abutment block 230 abuts against the bottom surface of the pressure regulating component 210. The top surface of the abutment block 230 is provided with a first placement position 231, and the bottom surface of the pressure regulating component 210 is provided with a second placement position 232. The first placement position 231 and the second placement position 232 form a receiving cavity, and a steel ball 240 is placed in the receiving cavity. The steel ball 240 is in clearance fit with the receiving cavity. When the pressure regulating component 210 adjusts the preload of the spring 100, the steel ball 240 applies pressure evenly to the abutment block 230.

[0025] It should be noted that one end of the spring 100 is fixed inside the sleeve 220 and abuts against the abutment block 230, while the other end extends outside the sleeve 220 and contacts the component to be pressurized. The pressure adjusting component 210 changes the compression of the spring 100 by rotating and raising / lowering, thereby adjusting the preload of the spring 100. When the pressure adjusting component 210 moves downward, the pressure is evenly transmitted to the abutment block 230 through the steel ball 240, and the abutment block 230 further compresses the spring 100, changing its preload. When the pressure adjusting component 210 moves upward, the pressure of the spring 100 is released. Because the steel ball 240 is placed in the receiving cavity between the abutment block 230 and the pressure regulating component 210, forming a rolling friction pair, during the adjustment process, the steel ball 240 and the receiving cavity are in clearance fit. When the pressure regulating component 210 applies pressure, the spring 100 is deformed by the force, and the steel ball 240 can roll slightly to automatically adjust its position to adapt to the relative displacement between the abutment block 230 and the pressure regulating component 210, ensuring that the pressure always acts perpendicularly to the axis of the spring 100, avoiding bending wear caused by lateral forces, and maintaining the stability and uniformity of pressure transmission. In this elastic adjustment mechanism, the abutment block 230 and the pressure regulating component 210 are designed separately. The spring 100 contacts the bottom of the abutment block 230 and does not slide against the pressure regulating component 210. Instead, it is compressed or released under the action of the abutment block 230 and the steel ball 240, which can significantly reduce wear. The abutment block 230, as an intermediate component, can also further absorb vibration energy and reduce fretting wear between itself and the end of the spring 100.

[0026] Traditional pressure regulating components 210 directly apply pressure to the spring 100, which can only transmit pressure in one direction and is sensitive to lateral forces. In a vibrating environment, lateral forces can easily cause the spring 100 to bend and wear, and may even cause the regulating component to loosen. In this elastic adjustment mechanism, the pressure regulating component 210 is separated from the abutment block 230 and uses rolling contact with steel balls 240. The steel balls 240 can roll within the receiving cavity and can automatically center the pressure direction, thereby avoiding the transmission of lateral forces and achieving synergy between elastic adjustment and stress dispersion design. The steel balls 240 convert the rotational motion of the pressure regulating component 210 into the smooth linear movement of the abutment block 230. When the steel balls 240 roll within the receiving cavity, the radial displacement of the pressure regulating component 210 is restricted by the cavity sidewall, ensuring that the motion trajectory coincides with the axis, improving the pressure control accuracy, and achieving a significant reduction in spring 100 wear and precise control of preload.

[0027] like Figure 3In some embodiments, the pressure regulating member 210 includes, from top to bottom, an adjusting part 211, a rod 212, and an abutting part 213. The rod 212 connects the adjusting part 211 and the abutting part 213. The abutting part 213 abuts against the abutting block 230. A second placement position 232 is disposed on the side of the abutting part 213 facing the abutting block 230. It is understood that the adjusting part 211, as an operating part, is operated to apply torque to raise or lower the entire pressure regulating member 210, thereby transmitting force from the adjusting part 211 to the rod 212, then to the abutting part 213, and finally to the abutting block 230. The second placement position 232 is located on the bottom surface of the abutting part 213, ensuring that the pressure direction of the steel ball 240 on the abutting block 230 is always perpendicular to the axis of the spring 100, further ensuring reduced bending wear of the spring 100 during adjustment.

[0028] Depending on the adjustment situation, the adjusting part 211 can be designed in different ways to apply torque. In some embodiments requiring manual fine adjustment, the outer side of the adjusting part 211 is provided with toothed protrusions. Rotating the adjusting part 211 causes the rod 212 and the abutment part 213 to rotate and rise within the sleeve 220. The toothed protrusions increase the friction, facilitating manual or tool-assisted rotation. Rotating the adjusting part 211 converts the rotational motion into linear up-and-down movement of the rod 212 and the abutment part 213 within the sleeve 220, thereby adjusting the pressure of the abutment block 230 on the spring 100, and thus changing the height position of the pressure-holding component connected to the pressure adjusting member 210 to meet different working requirements. In specific implementations, a connecting structure such as a through hole can be provided on the adjusting part 211 for installing an auxiliary adjustment handle or connecting and fixing with other components. In some embodiments of automatic adjustment, the adjusting part 211 is connected to a motor. Specifically, the motor-driven adjustment unit 211 applies force to the rod 212 and the abutment part 213, converting the rotational motion into the linear displacement of the pressure adjustment component 210, thereby changing the compression or preload of the spring 100, and ultimately achieving dynamic control of the pressure.

[0029] like Figure 4 In some embodiments requiring high adjustment precision, a pressure sensor 300 is also connected between the spring 100 and the component to be pressure-held. It is understood that in traditional manual adjustment, pressure fluctuations can be significant. To maintain consistent adjustment precision, the pressure sensor 300 provides real-time pressure feedback, assisting the operator in fine-tuning. In motor-driven adjustment, when the motor operates according to preset fixed parameters (such as speed, displacement, or time), the pressure sensor 300 can monitor the actual pressure in real time and dynamically adjust the motor output using the sensor feedback data, thereby eliminating pressure deviations caused by mechanical errors, environmental interference, or material properties.

[0030] like Figure 2During adjustment, if the pressure regulating component 210 falls off, it can lead to uncontrolled system pressure, failure of shock absorption, or loss of preload, causing equipment malfunction or even a safety accident. Therefore, a locking element 221 is provided at the top of the sleeve 220 to prevent the pressure regulating component 210 from falling off. This way, after the pressure regulating component 210 is adjusted, it is locked to fix its position with the sleeve 220. During use, the pressure regulating component 210 will not fall off due to vibration or impact. At the same time, it reduces the fit requirements between the sleeve 220 and the pressure regulating component 210, preventing wear during long-term use due to the tight fit. Specifically, a threaded cap or nut can be used as the locking element 221.

[0031] To facilitate installation, debugging, and maintenance, a viewing window 222 can be provided on the outer side of the sleeve 220, with a scale value on one side of the viewing window 222. It should be noted that in practical applications, different preload forces may need to be applied depending on the specific clamping task requirements. During the design and debugging phases, the correspondence between the position of the pressure regulating component 210 and the applied preload force can be established through experiments or calculations. This allows operators to easily adjust the position of the pressure regulating component 210 based on the preload information corresponding to the scale value. For example, during the initial installation of the equipment, the pressure regulating component 210 needs to be adjusted to a specific position according to design requirements. Operators only need to rotate the pressure regulating component 210 to the corresponding scale position, eliminating the need for complex measurements and calculations, greatly improving work efficiency. Furthermore, in the event of a malfunction, maintenance personnel can quickly determine whether the position of the pressure regulating component 210 is correct.

[0032] A guide fixing block 223 is connected to the bottom of the sleeve 220. The guide fixing block 223 has a connecting hole, through which the spring 100 passes and is sleeved with the sleeve 220. It should be noted that the guide fixing block 223 can be installed and fixed on the equipment using the elastic adjustment mechanism of this utility model. The setting of the guide fixing block 223 ensures that the spring 100 can only move in the direction of extension and retraction along the axis of the sleeve 220, reducing the lateral force on the spring 100 and ensuring that the spring 100 always remains in a straight state during the extension and retraction process.

[0033] like Figure 4 The aforementioned elastic adjustment mechanism is applied to a pressure holding device. By changing the compression of the elastic component spring 100 through the pressure regulating component 210, the elastic force is directly controlled, thereby precisely adjusting the pressure applied by the pressure holding device to the pressure-holding component. Since the pressure regulating component 210 is separated from the abutment block 230 and uses steel balls 240 for rolling contact, the wear of the spring 100 is significantly reduced and the preload is precisely controlled, thereby reducing the overall downtime and maintenance time of the pressure holding device.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tension adjustment mechanism that reduces spring wear, characterized by, The device includes a spring and a spring adjustment assembly. The spring adjustment assembly includes a pressure adjusting component and a sleeve. The pressure adjusting component is rotatably and vertically connected to the upper part of the sleeve. One end of the spring is connected to the lower part of the sleeve, and the other end of the spring extends out of the sleeve and connects to the component to be pressure-held. An abutment block is provided between the pressure adjusting component and the spring. The bottom surface of the abutment block abuts against the spring, and the top surface of the abutment block abuts against the bottom surface of the pressure adjusting component. The top surface of the abutment block has a first placement position, and the bottom surface of the pressure adjusting component has a second placement position. The first placement position and the second placement position correspond to form a receiving cavity. A steel ball is placed in the receiving cavity, and the steel ball is in clearance fit with the receiving cavity. When the pressure adjusting component adjusts the spring preload, the steel ball applies pressure evenly to the abutment block.

2. The spring force adjustment mechanism for reducing spring wear according to claim 1, characterized in that, The pressure regulating component includes, from top to bottom, an adjusting part, a rod body, and an abutting part. The rod body connects the adjusting part and the abutting part. The abutting part abuts against the abutting block. The second placement position is located on the side of the abutting part facing the abutting block.

3. The spring force adjustment mechanism for reducing spring wear according to claim 2, characterized in that, The outer side of the adjustment part is provided with tooth-shaped ridges.

4. The spring force adjustment mechanism for reducing spring wear according to claim 3, characterized in that, The adjustment part is provided with a through hole.

5. The spring force adjustment mechanism for reducing spring wear according to claim 2, characterized in that, The adjustment unit is connected to the motor.

6. The spring force adjustment mechanism for reducing spring wear according to claim 1, characterized in that, A pressure sensor is also connected between the spring and the component to be pressurized.

7. The spring force adjustment mechanism for reducing spring wear according to claim 1, characterized in that, The top of the sleeve is provided with an anti-detachment locking component, which is used to prevent the pressure regulating component from detaching.

8. The spring force adjustment mechanism for reducing spring wear according to claim 1, characterized in that, The sleeve has a viewing window on its outer side, and a scale value is provided on one side of the viewing window.

9. The spring force adjustment mechanism for reducing spring wear according to claim 1, characterized in that, The bottom of the sleeve is connected to a guide fixing block, and the guide fixing block has a connecting hole. The spring passes through the connecting hole and is sleeved with the sleeve.

10. A pressure-holding device, characterized in that, Includes the spring force adjustment mechanism for reducing spring wear as described in any one of claims 1-9.

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