A torsion spring assembly and a lift table

Abstract

The application provides a torsional spring assembly and a lifting table. The torsional spring assembly comprises a torsional spring, a torsional spring seat for sleeving a shaft body, the torsional spring seat comprising a cylindrical part for sleeving the shaft body, the torsional spring being sleeved to the outer surface of the cylindrical part, the outer surface being provided with a groove arranged along the axial direction of the cylindrical part, and the groove being used for accommodating lubricating grease. The application solves the problem that the technical solutions in the prior art cannot solve the abnormal sound problem of the torsional spring assembly in the working process.

Description

Technical Field

[0001] This invention relates to the field of torsion spring assembly technology, and more specifically, to a torsion spring assembly and a height-adjustable table. Background Technology

[0002] Torsion springs, as commonly used mechanical parts, are frequently used in conjunction with spring bases and flanges. During operation, the self-excited vibration of the torsion spring as a whole causes the free end of the spring tail to vibrate at a higher frequency, exhibiting a certain periodicity. This periodic free vibration of the free end of the spring tail continuously contacts the base chassis, thus generating abnormal noise. The abnormal noise originates from the scraping between the free end of the torsion spring and the edge of the flange of the torsion spring support, exciting the interfacial frictional resistance between the inner cylindrical surface of the torsion spring and the cylindrical surface of the support, forming a gap impact excitation. When the frequency of this excitation is close to the natural frequency of the torsion spring, the torsion spring enters a self-excited oscillation state, forming the abnormal noise. Specifically, torsion spring assemblies can be applied in height-adjustable desks. During the upward movement of the desk, the free end of the torsion spring scrapes against the flange, causing the torsion spring to generate self-excited oscillation and resulting in abnormal noise. During the downward movement of the desk, the torsion spring provides a clamping force, at which point no abnormal noise is generated.

[0003] Therefore, it is evident that the problem with the relevant technologies is that the technical solutions in the relevant technologies cannot solve the problem of abnormal noise in the torsion spring assembly during operation. Summary of the Invention

[0004] The problem solved by this invention is that the technical solutions in related technologies cannot solve the problem of abnormal noise in the torsion spring assembly during operation.

[0005] To address the aforementioned problems, the primary objective of this invention is to provide a torsion spring assembly.

[0006] The second objective of this invention is to provide a height-adjustable desk.

[0007] To achieve the first objective of the present invention, an embodiment of the present invention provides a torsion spring assembly, the torsion spring assembly comprising: a torsion spring; a torsion spring seat for sleeved on a shaft, the torsion spring seat comprising a cylindrical portion for sleeved on the shaft, the torsion spring being sleeved on the outer surface of the cylindrical portion, the outer surface being provided with a groove arranged along the axial direction of the cylindrical portion, the groove being used to accommodate grease.

[0008] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the solution of this embodiment can effectively suppress the self-excited oscillation of the torsion spring assembly during operation, thereby solving the problem of abnormal noise of the torsion spring assembly.

[0009] In one embodiment of the present invention, the groove includes a first surface and a second surface, which are arranged opposite to each other to form a groove; both the first surface and the second surface are curved structures; wherein, when the torsion spring seat rotates and throws out the grease, the curved structure can slow down the speed at which the grease is thrown out of the groove.

[0010] In one embodiment of the invention, the first and second surfaces are parallel, and the opening on the outer surface is inclined relative to a radial line extending from the center of the cylindrical portion.

[0011] Compared with the prior art, the technical effect achieved by this technical solution is as follows: The solution of this embodiment can effectively control the amount of grease flowing out of the groove when the torsion spring seat rotates and throws out the grease, avoiding excessive grease overflow and oil leakage. In one embodiment of the present invention, the torsion spring assembly can switch between a first state and a second state; when the torsion spring assembly is in the first state, the torsion spring seat rotates clockwise, and the grease overflows from the groove; when the torsion spring assembly is in the second state, the torsion spring seat rotates counterclockwise, and the grease returns to the groove.

[0012] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the solution of this embodiment can effectively suppress the system oscillation problem of the torsion spring assembly, thereby effectively improving the abnormal noise problem of the torsion spring assembly.

[0013] In one embodiment of the present invention, there are multiple grooves, and the multiple grooves are evenly distributed along the circumference of the cylindrical portion.

[0014] Compared with existing technologies, the technical effect achieved by adopting this technical solution is that multiple grooves are evenly distributed along the circumference of the cylindrical part, making the grease overflow more evenly.

[0015] In one embodiment of the present invention, the torsion spring seat further includes: a second cylinder, a cylindrical portion disposed on the second cylinder, the outer diameter of the second cylinder being larger than the outer diameter of the cylindrical portion; a flange portion, the flange portion being composed of a first frustum and a first cylinder, the second cylinder being disposed on the upper bottom surface of the first frustum, the diameter of the upper bottom surface being larger than the diameter of the second cylinder; wherein, the second cylinder isolates the torsion spring from the flange portion.

[0016] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: In the solution of this embodiment, the torsion spring is sleeved on the outer surface of the cylindrical part, and the second cylinder isolates the cylindrical part from the flange part, thereby reducing the contact between the torsion spring and the edge of the flange part, and effectively reducing the occurrence of abnormal noise.

[0017] In one embodiment of the present invention, the torsion spring includes a fixed end, which is away from the flange portion, and the fixed end is provided with a buckle for fixing the position of the fixed end.

[0018] Compared with the prior art, the technical effect achieved by adopting this technical solution is: the solution of this embodiment effectively reduces the contact between the end of the torsion spring near the flange and the flange.

[0019] In one embodiment of the present invention, the torsion spring includes a free end, which is close to the flange and has a cross-sectional plane.

[0020] Compared with existing technologies, the technical effect achieved by adopting this technical solution is that cutting the free end flat can effectively suppress the self-excited vibration of the tail end of the torsion spring.

[0021] To achieve the second objective of the present invention, an embodiment of the present invention provides a height-adjustable desk, which includes: a height-adjustable desk body; height-adjustable desk legs; and a torsion spring assembly as described in any of the above embodiments, wherein the torsion spring assembly is disposed inside the height-adjustable desk legs, the height-adjustable desk legs are connected to the height-adjustable desk body, and the torsion spring assembly provides a clamping force during the descent of the height-adjustable desk body.

[0022] The height-adjustable table in this embodiment includes a height-adjustable table body, height-adjustable table legs, and a torsion spring assembly as described in any embodiment of the present invention. The torsion spring assembly is located inside the height-adjustable table legs, and therefore has all the beneficial effects of the torsion spring assembly as described in any embodiment of the present invention, which will not be elaborated here. Attached Figure Description

[0023] Figure 1 This is one of the structural schematic diagrams of the lifting table legs and torsion spring assembly according to some embodiments of the present invention;

[0024] Figure 2 This is a second schematic diagram of the structure of the lifting table legs and torsion spring assembly according to some embodiments of the present invention;

[0025] Figure 3 This is one of the structural schematic diagrams of a torsion spring assembly according to some embodiments of the present invention;

[0026] Figure 4 This is a second schematic diagram of the structure of a torsion spring assembly according to some embodiments of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of a torsion spring seat according to some embodiments of the present invention;

[0028] Figure 6 This is a schematic diagram of the torsion spring structure according to some embodiments of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10-Torsion spring assembly; 100-Torsion spring; 110-Fixed end; 120-Free end; 200-Torsion spring seat; 210-Cylindrical part; 220-Groove; 221-First surface; 222-Second surface; 230-Second cylinder; 240-Flange part; 241-First frustum; 242-First cylinder; 300-Lifting table leg. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] [First Embodiment]

[0033] See Figure 1 , Figure 2 and Figure 4 This embodiment provides a torsion spring assembly 10, which includes: a torsion spring 100; and a torsion spring seat 200 for sleeved on a shaft. The torsion spring seat 200 includes a cylindrical portion 210 for sleeved on the shaft. The torsion spring 100 is sleeved on the outer surface of the cylindrical portion 210, and the outer surface is provided with a groove 220 arranged along the axial direction of the cylindrical portion 210. The groove 220 is used to accommodate grease.

[0034] When the torsion spring assembly 10 is in operation, it is typically fitted onto a shaft assembly for braking, such as a brake screw or motor shaft, and rotates accordingly. During rotation, the torsion spring assembly 10 generates abnormal noise. The periodic free vibration of the torsion spring 100 continuously contacts the torsion spring seat 200. The interface frictional resistance between the torsion spring 100 and the torsion spring seat 200 creates a gap impact excitation. When the frequency of this excitation is close to the natural frequency of the torsion spring, the torsion spring 100 enters a self-excited oscillation state, resulting in the abnormal noise. In this embodiment, the torsion spring seat 200 includes a cylindrical portion 210, and the torsion spring 100 is fitted onto the outer surface of the cylindrical portion 210. The outer surface has a groove 220 arranged axially along the cylindrical portion 210, which is used to accommodate lubricating grease.

[0035] Preferably, when the torsion spring assembly 10 is applied to the height-adjustable table, the torsion spring assembly 10 is located in the table leg. In actual use, when the torsion spring assembly 10 rotates clockwise, the height-adjustable table rises, and there is abnormal noise. In the embodiment of the present invention, the grease in the groove 220 partially overflows after the friction between the torsion spring 100 and the cylindrical part 210 heats up, which improves the friction condition of the contact interface between the torsion spring 100 and the torsion spring seat 200, increases the system damping, and effectively suppresses the self-excited oscillation of the torsion spring assembly 10.

[0036] Understandably, the solution of this embodiment can effectively suppress the self-excited oscillation of the torsion spring assembly 10 during operation, thereby solving the problem of abnormal noise of the torsion spring assembly 10.

[0037] Further, see Figure 4 and Figure 5 In one specific embodiment, the groove 220 includes a first surface 221 and a second surface 222, which are arranged opposite to each other to form the groove 220; both the first surface 221 and the second surface 222 are curved structures; wherein, when the torsion spring seat 200 rotates and throws out the grease, the curved structure can slow down the speed at which the grease is thrown out of the groove 220.

[0038] In one embodiment of the invention, the first surface 221 and the second surface 222 are parallel and inclined at the opening on the outer surface relative to the radial line extending from the center of the cylindrical portion 210.

[0039] In this embodiment, the groove 220 is milled out along the axial direction of the cylindrical portion 210. The groove 220 includes a first surface 221 and a second surface 222 that are disposed opposite to each other. Both the first surface 221 and the second surface 222 are curved structures.

[0040] Understandably, the solution in this embodiment can effectively control the amount of grease flowing out of the groove 220 when the torsion spring seat 200 rotates and throws out the grease, thus preventing excessive grease overflow and oil leakage. Further, see... Figure 3 and Figure 4 In one specific embodiment, the torsion spring assembly 10 can switch between a first state and a second state; when the torsion spring assembly 10 is in the first state, the torsion spring seat 200 rotates clockwise and grease overflows from the groove 220; when the torsion spring assembly 10 is in the second state, the torsion spring seat 200 rotates counterclockwise and grease returns to the groove 220.

[0041] For example, the torsion spring assembly 10 is disposed in the lifting table; when the lifting table rises, the torsion spring seat 200 rotates clockwise, and the torsion spring 100 is pulled apart. At this time, the torsion spring assembly 10 is in the first state. The grease in the groove 220 overflows after the friction between the torsion spring 100 and the cylindrical part 210 heats up, which improves the friction condition of the contact interface between the torsion spring 100 and the torsion spring seat 200, increases the system damping, and effectively suppresses the self-excited oscillation of the torsion spring assembly 10; when the lifting table falls, the torsion spring seat 200 rotates counterclockwise. At this time, the torsion spring assembly 10 is in the second state. The torsion spring assembly 10 provides a clamping force for the lifting table, and the grease returns to the groove 220.

[0042] It should be noted that the lubrication state between the torsion spring 100 and the torsion spring seat 200 is directly related to the system damping, and therefore directly correlated with abnormal noise. When there is no lubrication, the friction between the inner wall of the torsion spring 100 and the cylindrical part 210 increases, resulting in significant contact interface problems and greatly accelerating the wear of the cylindrical part 210; when grease is placed in the groove 220, the friction state of the interface is improved, and the system oscillation is suppressed.

[0043] Understandably, the solution of this embodiment can effectively suppress the system oscillation problem of the torsion spring assembly 10, thereby effectively improving the abnormal noise problem of the torsion spring assembly 10.

[0044] Further, see Figure 4 and Figure 5 In one specific embodiment, there are multiple grooves 220, and the multiple grooves 220 are evenly distributed around the cylindrical portion 210.

[0045] Understandably, multiple grooves 220 are evenly distributed circumferentially along the cylindrical portion 210, so that the grease overflows more evenly.

[0046] Further, see Figure 4 and Figure 5 In one specific embodiment, the torsion spring seat 200 further includes: a second cylinder 230, a cylindrical portion 210 disposed on the second cylinder 230, the outer diameter of the second cylinder 230 being larger than the outer diameter of the cylindrical portion 210; a flange portion 240, the flange portion 240 being composed of a first frustum 241 and a first cylinder 242, the second cylinder 230 being disposed on the upper bottom surface of the first frustum 241, the diameter of the upper bottom surface being larger than the diameter of the second cylinder 230; wherein, the second cylinder 230 isolates the torsion spring 100 from the flange portion 240.

[0047] Preferably, the diameter of the first cylinder 242 is 28 cm, the diameter of the second cylinder 230 is 24.4 cm, and the diameter of the cylindrical portion 210 is 22.4 cm.

[0048] Understandably, in this embodiment, the torsion spring 100 is sleeved on the outer surface of the cylindrical portion 210, and the second cylinder 230 isolates the cylindrical portion 210 from the flange portion 240, thereby reducing the contact between the torsion spring 100 and the edge of the flange portion 240 and effectively reducing the occurrence of abnormal noise.

[0049] Further, see Figure 3 and Figure 6 In one specific embodiment, the torsion spring 100 includes a fixed end 110, which is located away from the flange portion 240. The fixed end 110 is provided with a buckle for fixing the position of the fixed end 110.

[0050] Preferably, the buckle fixes the fixed end 110 to the torsion spring seat 200, so that the fixed end 110 does not descend during the rotation of the torsion spring seat.

[0051] Understandably, the solution in this embodiment effectively reduces the contact between the end of the torsion spring 100 near the flange 240 and the flange 240.

[0052] Further, see Figure 3 and Figure 6 In one specific embodiment, the torsion spring 100 includes a free end 120, which is close to the flange portion 240, and the free end 120 is a cross-sectional plane.

[0053] Understandably, cutting the free end 120 flat can effectively suppress the self-excited vibration of the tail end of the torsion spring 100.

[0054] [Second Embodiment]

[0055] See Figure 1 and Figure 2This embodiment provides a height-adjustable desk, which includes: a height-adjustable desk body; height-adjustable desk legs 300; and a torsion spring assembly 10 as described in any of the above embodiments. The torsion spring assembly 10 is disposed inside the height-adjustable desk legs 300, which are connected to the height-adjustable desk body. During the descent of the height-adjustable desk body, the torsion spring assembly 10 provides a clamping force.

[0056] The height-adjustable table in this embodiment includes a height-adjustable table body, height-adjustable table legs 300, and a torsion spring assembly 10 as in any embodiment of the present invention. The torsion spring assembly 10 is disposed inside the height-adjustable table legs 300, and therefore has all the beneficial effects of the torsion spring assembly 10 as in any embodiment of the present invention, which will not be described in detail here.

[0057] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A torsion spring assembly (10) characterized by, The torsional spring assembly (10) comprises: a torsional spring (100); a torsional spring seat (200) for sleeving the shaft body, the torsional spring seat (200) comprising a cylindrical part (210) for sleeving the shaft body, the torsional spring (100) sleeving the outer surface of the cylindrical part (210), the outer surface being provided with a groove (220) arranged along the axial direction of the cylindrical part (210), the groove (220) being used for accommodating lubricating grease; the groove (220) comprises a first face (221) and a second face (222), the first face (221) and the second face (222) being oppositely arranged to form the groove (220); the first face (221) and the second face (222) are both curved structures; wherein, when the torsional spring seat (200) rotates to throw out the lubricating grease, the curved structure can slow down the speed of the lubricating grease thrown out of the groove (220).

2. The torsion spring assembly (10) of claim 1, wherein the first face (221) and the second face (222) are parallel and inclined relative to the radial line extending from the center of the cylindrical part (210) at the opening of the outer surface.

3. The torsion spring assembly (10) of claim 1, wherein the torsional spring assembly (10) can be switched between a first state and a second state; when the torsional spring assembly (10) is in the first state, the torsional spring seat (200) rotates clockwise, and the lubricating grease overflows from the groove (220); when the torsional spring assembly (10) is in the second state, the torsional spring seat (200) rotates counterclockwise, and the lubricating grease returns to the groove (220).

4. The torsion spring assembly (10) of claim 1, wherein the number of the grooves (220) is multiple, and the multiple grooves (220) are uniformly distributed along the circumferential direction of the cylindrical part (210).

5. The torsion spring assembly (10) of claim 1, wherein, the torsional spring seat (200) further comprises: a second cylinder (230), the cylindrical part (210) being arranged on the second cylinder (230), the outer diameter of the second cylinder (230) being greater than the outer diameter of the cylindrical part (210); a flange part (240), the flange part (240) being composed of a first circular truncated cone (241) and a first cylinder (242), the second cylinder (230) being arranged on the upper bottom surface of the first circular truncated cone (241), the diameter of the upper bottom surface being greater than the diameter of the second cylinder (230); wherein, the second cylinder (230) isolates the torsional spring (100) from the flange part (240).

6. The torsion spring assembly (10) of claim 5, wherein, the torsional spring (100) comprises a fixed end (110), the fixed end (110) being away from the flange part (240), the fixed end (110) being provided with a buckle, the buckle being used for fixing the position of the fixed end (110).

7. The torsion spring assembly (10) of claim 5, wherein: the torsional spring (100) comprises a free end (120), the free end (120) being close to the flange part (240), the free end (120) being a truncated plane.

8. A lift table characterized by, the lifting table comprises: a lifting table body; a lifting table leg (300); The torsion spring assembly (10) as claimed in any one of claims 1 to 7, is provided within the lifting table leg (300) connected with the lifting table body, the torsion spring assembly (10) provides a holding force during the lowering of the lifting table body.

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