Spring force adjusting elastic piece

Abstract

The utility model discloses a spring force adjusting elastic piece, which belongs to the technical field of medical rehabilitation instruments and comprises an upper limit seat and a lower limit seat, and a universal joint coupling is arranged between the upper limit seat and the lower limit seat. The spring is arranged between the upper limiting base and the lower limiting base in a compressed mode and coaxially arranged on the universal joint coupler in a sleeving mode. According to the spring force adjusting elastic piece, the spring force can be flexibly adjusted, the structure is ingenious, and installation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of medical rehabilitation equipment technology, specifically relating to a spring force adjustment elastic element. Background Technology

[0002] In existing standing balance training equipment, the spring-swing mechanism design fails to adequately consider the directional coordination of dynamic restoring forces during rotation selection, leading to axial / radial force interference with motion stability. Furthermore, the fixing method introduces unintended "drift" phenomena, exacerbating the risk of spring failure. These issues collectively restrict the safety, durability, and motion control accuracy of the training equipment.

[0003] In traditional spring design, the direction of helix can affect the direction of the restoring force when the spring is subjected to force. When a spring undergoes endless circular oscillation, that is, when the spring oscillates continuously in the circumferential direction without a fixed end, the direction of helix may result in different axial and radial restoring forces. For example, when a spring is subjected to torsional force, left-handed and right-handed springs may produce restoring forces in different directions.

[0004] Potential problems with the fixing method of the spring and support frame: Common fixing methods (such as bolt locking, welding, or clamping) rigidly constrain the two ends of the spring to the upper and lower limit seats. However, the upper and lower limit seats of the spring are only connected by the spring itself. When the user stands on the standing balance training equipment and performs endless circular swinging motion, the mechanism may experience a "drift" phenomenon, that is, the swing center deviates from the preset position, reducing training accuracy, stability, and motion trajectory. At the same time, it leads to a weakening of the restoring force, and the local stress concentration near the fixing point is prone to fatigue fracture of the spring material, significantly shortening its lifespan and further affecting the performance and safety of the mechanism.

[0005] In the field of medical rehabilitation equipment, spring-loaded adjustable elastic elements or devices are widely used as elastic components in electric assistive devices for standing training of patients with lower limb muscle weakness, mainly for functions such as cushioning, shock absorption, and energy storage. However, the stiffness and force of traditional spring devices are usually fixed after manufacturing, and cannot be flexibly adjusted according to actual usage scenarios. This makes it difficult for spring devices to achieve optimal performance under different loads or working conditions. Furthermore, some existing technologies often require complex structural designs to achieve spring force adjustment, increasing manufacturing costs and installation difficulty. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a spring force adjustment elastic element, which can flexibly adjust the spring force, has a clever structure, and is easy to install.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] On the one hand, this utility model provides a spring force adjustment elastic element, including an upper limit seat and a lower limit seat, a universal joint coupling is disposed between the upper limit seat and the lower limit seat, and a spring is compressed between the upper limit seat and the lower limit seat and coaxially sleeved on the universal joint coupling.

[0009] Furthermore, it also includes a spring support seat, and the lower limiting seat is provided with a displacement slot hole that matches the shape of the spring support seat;

[0010] The elastic support seat is adjusted in position along the depth direction of the displacement slot by an adjusting bolt, and when it protrudes from the upper end face of the displacement slot, it presses against and supports the lower end face of the spring.

[0011] Furthermore, the spring support and the displacement slot are in a matching cross shape. The spring support has a through hole at its center for the adjustment bolt to pass through, and the displacement slot has a bolt hole at its center for connecting the adjustment bolt.

[0012] Furthermore, a coupling fixing seat is provided between the upper limiting seat and the lower limiting seat, and the two ends of the universal joint coupling are respectively fixedly connected to the two coupling fixing seats.

[0013] Furthermore, the upper limiting seat and the corresponding coupling fixing seat are bolted together;

[0014] And / or, the lower limiting seat and the corresponding coupling fixing seat are bolted together.

[0015] Furthermore, both ends of the universal joint coupling are bolted to the two coupling mounting seats respectively.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: The spring force adjustment elastic element provided by this utility model consists of an upper limit seat, a lower limit seat, a universal joint coupling and a spring. By setting a spring support seat and an adjusting bolt, the spring support seat can be moved along the depth direction of the displacement slot hole according to actual needs, thereby changing the compression of the spring and realizing flexible adjustment of the spring force. This allows the spring element to adapt to different loads and working conditions, improving its applicability and practicality. The structure is ingenious and the installation is convenient.

[0017] The spring support and the displacement slot adopt a matching cross-shaped structure, which not only ensures the stable movement of the spring support during adjustment, but also ensures close pressure and support contact with the lower end face of the spring when the upper end face of the protruding displacement slot is in contact, effectively preventing the spring from shifting or deforming during operation.

[0018] Universal joint couplings allow springs to move and transmit force in different directions, enabling spring devices to adapt to complex multi-directional motion scenarios and greatly improving the application range and flexibility of elastic components. Universal joint couplings (or hinged fixed structures) improve the connection between the spring and the support frame, significantly optimizing the dynamic performance of the mechanism. In particular, they effectively suppress drift and alleviate the problem of asymmetrical restoring forces caused by rotation, offsetting the pulling effect of asymmetrical restoring forces on the support frame caused by rotation, and preventing the motion trajectory from deviating from the central axis. Attached Figure Description

[0019] Figure 1 An exploded view of a spring force adjustment elastic element provided by this utility model.

[0020] Figures 2-5 This utility model provides an assembly process diagram of a spring force adjustment elastic element.

[0021] Figure 6 This is a three-dimensional schematic diagram of a spring force adjustment elastic element provided by this utility model.

[0022] Figure 7 A cross-sectional view of a spring force adjustment elastic element provided by this utility model.

[0023] In the picture:

[0024] 1. Upper limit seat; 2. Lower limit seat; 3. Universal joint coupling; 4. Spring; 5. Spring support seat; 6. Displacement slot; 7. Adjusting bolt; 8. Through hole; 9. Bolt hole; 10. Coupling fixing seat; 11. Bolt. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example

[0029] like Figures 1-7 As shown, this utility model embodiment provides a spring force adjustment elastic element, including an upper limiting seat 1 and a lower limiting seat 2, a universal joint coupling 3 is disposed between the upper limiting seat 1 and the lower limiting seat 2, and a spring that is compressed between the upper limiting seat 1 and the lower limiting seat 2 and coaxially sleeved on the universal joint coupling 3.

[0030] In this embodiment, both the upper limiting seat 1 and the lower limiting seat 2 can be configured as circular structures, such as discs.

[0031] In some embodiments, the spring force adjusting elastic element further includes a spring support seat 5, and the lower limiting seat 2 is provided with a displacement slot 6 that matches the shape of the spring support seat 5.

[0032] The elastic support 5 is adjusted in position along the depth direction of the displacement slot 6 by an adjusting bolt 7, and when it protrudes from the upper end face of the displacement slot 6, it presses against the lower end face of the spring for support.

[0033] In practical applications, operators can adjust the spring support 5 by moving the adjusting bolt 7 along the depth direction of the displacement slot 6, thereby changing the spring compression and flexibly adjusting the spring force. By flexibly adjusting the spring force, optimal buffering, shock absorption, or energy storage effects can be maintained under different working conditions, thus improving overall performance and operational stability, and extending the equipment's service life.

[0034] In some embodiments, the spring support 5 and the displacement slot 6 are in a matching cross shape. The spring support 5 has a through hole 8 for passing through the adjusting bolt 7 at its center, and the displacement slot 6 has a bolt hole 9 for connecting the adjusting bolt 7 at its center.

[0035] The matching cross-shaped structure not only ensures the stable movement of the spring support 5 during adjustment, but also ensures close contact with the lower end face of the spring when the upper end face of the protruding displacement slot 6 is in close pressure support, effectively preventing the spring from shifting or deforming during operation, thus improving the stability and service life of the spring.

[0036] In some embodiments, a coupling fixing seat 10 facing each other and coaxially configured is provided between the upper limiting seat 1 and the lower limiting seat 2, and the two ends of the universal joint coupling 3 are respectively fixedly connected to the two coupling fixing seats 10.

[0037] The upper limiting seat 1 and the corresponding coupling fixing seat 10 are bolted together. For example, the coupling fixing seat 10 is provided with an extension that extends into and inserts into the upper limiting seat 1, and the two are fixedly connected together by several bolts passing through the upper limiting seat 1 and the extension.

[0038] And / or, the lower limit seat 2 and the corresponding coupling fixing seat 10 are bolted together.

[0039] The two ends of the universal joint coupling 3 are bolted to the two coupling fixing seats 10 respectively.

[0040] In addition, other connection methods can be used between the upper limit seat 1 and the corresponding coupling fixing seat 10, between the lower limit seat 2 and the corresponding coupling fixing seat 10, and between the two ends of the universal joint coupling 3 and the two coupling fixing seats 10 respectively. These will not be listed and explained one by one here.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A spring force adjustment elastic element, characterized in that, It includes an upper limit seat and a lower limit seat, a universal joint coupling is disposed between the upper limit seat and the lower limit seat, and a spring is compressed between the upper limit seat and the lower limit seat and coaxially sleeved on the universal joint coupling.

2. The spring force adjusting elastic element according to claim 1, characterized in that, It also includes a spring support seat, and the lower limiting seat is provided with a displacement slot hole that matches the shape of the spring support seat; The spring support seat is adjusted in position along the depth direction of the displacement slot by an adjusting bolt, and when it protrudes from the upper end face of the displacement slot, it presses against and supports the lower end face of the spring.

3. The spring force adjusting elastic element according to claim 2, characterized in that, The spring support and the displacement slot are in a matching cross shape. The spring support has a through hole at its center for the adjustment bolt to pass through, and the displacement slot has a bolt hole at its center for connecting the adjustment bolt.

4. The spring force adjusting elastic element according to claim 1, characterized in that, A coupling fixing seat is provided between the upper limiting seat and the lower limiting seat, and the two ends of the universal joint coupling are respectively fixedly connected to the two coupling fixing seats.

5. The spring force adjusting elastic element according to claim 4, characterized in that, The upper limiting seat and the corresponding coupling fixing seat are bolted together; And / or, the lower limiting seat and the corresponding coupling fixing seat are bolted together.

6. The spring force adjusting elastic element according to claim 4, characterized in that, Both ends of the universal joint coupling are bolted to the two coupling mounting seats respectively.

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