Anti-fracture transmission shaft of lifting table

Abstract

The utility model discloses an anti-fracture lifting table transmission shaft, which relates to the technical field of lifting tables, and comprises a movable component and a fixed component, the bottom end of the movable component and the top end of the fixed component are installed in a sliding manner, and the fixed component comprises a fixed shaft. Meanwhile, a plurality of reinforcing ribs are evenly distributed on the inner wall of the movable shaft in the axial direction, the bending resistance and torsional rigidity of the movable shaft are enhanced, when the transmission shaft is vibrated or impacted, the high-damping filler can absorb energy, reduce the vibration amplitude and improve the stability of the transmission shaft, the movable shaft meets the overall strength requirement, meanwhile, the weight of the shaft is reduced, and the rotational inertia is reduced; and meanwhile, the nitriding layer is additionally arranged on the outer wall of the movable shaft, so that the hardness and the wear resistance of the shaft surface can be improved, residual compressive stress can be generated on the surface, part of tensile stress generated during working is counteracted, the fatigue life of the transmission shaft is further prolonged, and the fracture resistance of the transmission shaft is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting table technical field especially relates to a kind of anti-fracture lifting table transmission shaft. BACKGROUND

[0002] In modern office and living scene, lifting table provides more healthy, comfortable use experience for user by its adjustable height characteristics, and is widely applied, transmission shaft is as the key component of lifting table to realize lifting function, its performance directly influences the reliability and service life of lifting table.

[0003] As China patent CN221012402U discloses a two-section lifting desk, including table frame, desktop and desk hopper, desktop is fixedly installed on the top of table frame, desk hopper is fixedly installed between the inner wall of both sides of table frame, and is located below desktop, the bottom of both ends of table frame is fixedly connected with movable oval tube, the outer periphery of movable oval tube is slidably sleeved with fixed oval tube, the bottom end of fixed oval tube is fixedly connected with table leg, movable oval tube is communicated with the cavity of corresponding fixed oval tube.

[0004] At present, the common lifting table transmission shaft on market, the transmission shaft of part solid structure, although certain intensity, but weight is larger, increases the load of motor, and stress concentration phenomenon is obvious, simultaneously, transmission shaft bears complex and changeable load in frequent lifting operation process, easily makes transmission shaft produce fatigue crack, with the lapse of time, lead to transmission shaft fracture, influence the normal use of lifting table, in view of above problem, propose a kind of anti-fracture lifting table transmission shaft. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the problems in the prior art and proposes an anti-fracture lifting table transmission shaft.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of anti-fracture lifting table transmission shaft, including movable assembly and fixed component, the bottom end of movable assembly and the top end of fixed component sliding installation, the fixed component includes fixed shaft, the outside annular array of fixed shaft is opened with multiple sliding slots, the top of fixed shaft is opened with movable slot, and the outer edge of movable slot is evenly distributed with multiple limit slots along the axial direction, the movable assembly includes fixed ring and movable shaft, the top end of fixed ring is fixedly connected with the top end of movable shaft, and the bottom end inner edge of fixed ring is fixedly connected with multiple sliding blocks in annular array, one end of sliding block is slidably installed with the inside of sliding slot, the outside of movable shaft is slidably installed with the inside of movable slot, the inner wall of movable shaft is evenly distributed with multiple reinforcing ribs along the axial direction, and the gap between the reinforcing rib inside movable shaft is filled with high-damping filler, the outer wall of movable shaft is provided with nitriding layer, and the outer wall of movable shaft is evenly distributed with multiple convex rods along the axial direction, and the outside of convex rod is slidably installed with the inside of limit slot.

[0007] Preferably, the top of the sliding block is provided with an elastic element one, and the bottom of the sliding block is provided with an elastic element two.

[0008] Preferably, the top of the sliding block is provided with an elastic element one, and the bottom of the sliding block is provided with an elastic element two.

[0009] Preferably, the top of the fixed ring is welded with a connecting shaft, the top of the connecting shaft is welded with a mounting plate one, and the outer wall of the connecting shaft is evenly distributed with multiple reinforcing ribs one along the axial direction.

[0010] Preferably, the bottom of the fixed shaft is welded with a mounting plate two, and the outer wall of the fixed shaft is evenly distributed with multiple reinforcing ribs two along the axial direction.

[0011] Preferably, the bottom of the connecting shaft is welded with the top of the movable shaft, and the top of the fixed ring is fixedly connected with the outer edge of the bottom of the connecting shaft.

[0012] Preferably, the cross section of the reinforcing rib is triangular or trapezoidal, and the reinforcing rib is integrally formed with the inner wall of the movable shaft.

[0013] Preferably, the cross section of the convex rod is triangular or trapezoidal.

[0014] Compared with the prior art, the utility model has the advantages and positive effects that:

[0015] 1. The transmission shaft and the transmission assembly are combined to realize the up-down lifting function of the lifting table, the movable shaft can slide up and down along the movable groove, the fixed ring is slidably installed through the bottom end sliding block and the sliding groove, the fixed ring can slide up and down along the outer wall of the fixed shaft, the fixed ring and the movable shaft are combined, the anti-fracture performance of the transmission shaft as a whole is enhanced, and the stability during the up-down lifting of the movable assembly is also enhanced.

[0016] 2. The connecting shaft and the fixed shaft are solid shafts, and the movable shaft is a hollow shaft segment with a smaller diameter. The solid structure connecting shaft provides sufficient strength and rigidity, a plurality of reinforcing ribs are uniformly distributed on the inner wall of the movable shaft in the axial direction, and the reinforcing ribs are integrally formed with the shaft wall, thereby enhancing the bending and torsional stiffness of the movable shaft. Meanwhile, the gap between the reinforcing ribs is filled with high-damping filler. When the transmission shaft is subjected to vibration or impact, the high-damping filler can absorb energy, reduce vibration amplitude, and improve the stability of the transmission shaft. The movable shaft meets the overall strength requirement while reducing the weight of the shaft, thereby reducing the moment of inertia and the stress caused by inertial force. The hollow structure also has a buffering effect, which helps to disperse stress concentration. Meanwhile, a nitriding layer is added to the outer wall of the movable shaft. The nitriding layer not only improves the hardness and wear resistance of the shaft surface, but also generates residual compressive stress on the surface, which offsets part of the tensile stress generated during work, thereby further improving the fatigue life and anti-fracture ability of the transmission shaft. By increasing the fixed ring, the elastic member one and the elastic member two, the elastic member one and the elastic member two have high elasticity. When the elastic member one and the elastic member two are subjected to extrusion, the energy storage and energy absorption effect can be achieved, thereby further enhancing the anti-fracture effect of the transmission shaft. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A three-dimensional structure schematic view of the anti-fracture lifting table transmission shaft is provided for the utility model;

[0018] Figure 2 A structure schematic view of the fixed assembly of the anti-fracture lifting table transmission shaft is provided for the utility model;

[0019] Figure 3 A structure schematic view of the movable assembly of the anti-fracture lifting table transmission shaft is provided for the utility model;

[0020] Figure 4 A front view sectional view of the anti-fracture lifting table transmission shaft is provided for the utility model;

[0021] Figure 5 A top view sectional view of the movable shaft of the anti-fracture lifting table transmission shaft is provided for the utility model.

[0022] Legend: 1. Movable component; 2. Fixed component; 10. Protruding rod; 11. Mounting plate one; 12. Connecting shaft; 13. Reinforcing rib one; 14. Fixing ring; 15. Slider; 16. Movable shaft; 17. Reinforcing rib; 18. High damping filler; 19. Nitriding layer; 110. Elastic element one; 111. Elastic element two; 21. Mounting plate two; 22. Fixed shaft; 23. Slide groove; 24. Movable groove; 25. Limiting groove; 26. Reinforcing rib two. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Example 1: As Figure 1 - Figure 5 As shown, this utility model provides a fracture-resistant lifting table drive shaft, including a movable component 1 and a fixed component 2. The bottom end of the movable component 1 is slidably installed with the top end of the fixed component 2. The fixed component 2 includes a fixed shaft 22, with multiple sliding grooves 23 arranged in a ring array on the outer side of the fixed shaft 22. A movable groove 24 is provided on the top of the fixed shaft 22, and multiple limiting grooves 25 are evenly distributed along the axial direction on the outer edge of the movable groove 24. The movable component 1 includes a fixed ring 14 and a movable shaft 16, with the top end of the fixed ring 14 fixedly connected to the top end of the movable shaft 16. Multiple sliders 15 are fixedly connected to the inner edge of the bottom of the fixed ring 14 in a ring array. One end of the slider 15 is slidably installed with the inner side of the slide groove 23. The outer side of the movable shaft 16 is slidably installed with the inner side of the movable groove 24. Multiple reinforcing ribs 17 are evenly distributed along the axial direction on the inner wall of the movable shaft 16. The gaps between the reinforcing ribs 17 inside the movable shaft 16 are filled with high damping filler 18. A nitriding layer 19 is provided on the outer wall of the movable shaft 16. Multiple protruding rods 10 are evenly distributed along the axial direction on the outer wall of the movable shaft 16. The outer side of the protruding rods 10 is slidably installed with the inner side of the limiting groove 25.

[0026] The specific settings and effects of the embodiment are as follows: the connecting shaft 12 and the fixed shaft 22 are solid shafts, the movable shaft 16 is a hollow shaft segment with a smaller diameter, the connecting shaft 12 can provide sufficient strength and rigidity, a plurality of reinforcing ribs 17 are uniformly distributed on the inner wall of the movable shaft 16 in the axial direction, the bending and torsional rigidity of the movable shaft 16 is enhanced, and meanwhile, the gap between the reinforcing ribs 17 is filled with high-damping filler 18, which can absorb energy when the transmission shaft is subjected to vibration or impact, thereby improving the stability of the transmission shaft; the hollow movable shaft 16 in the middle can not only meet the overall strength requirement, but also reduce the weight of the shaft, reduce the moment of inertia, and reduce the stress caused by inertial force.

[0027] By adding a nitriding layer 19 on the outer wall of the movable shaft 16, the nitriding layer 19 can not only improve the hardness and wear resistance of the shaft surface, but also generate residual compressive stress on the surface, which can offset part of the tensile stress generated during work, thereby further improving the fatigue life and fracture resistance of the transmission shaft.

[0028] Embodiment two: as shown in Figure 1 Figure 5 The top end of the sliding block 15 is provided with an elastic member one 110, and the bottom end of the sliding block 15 is provided with an elastic member two 111. The top end of the sliding groove 23 is fixedly connected with one end of the elastic member one 110, and the bottom end of the sliding groove 23 is fixedly connected with one end of the elastic member two 111. The top end of the fixed ring 14 is welded with the connecting shaft 12, and the top end of the connecting shaft 12 is welded with the mounting plate one 11. A plurality of reinforcing ribs one 13 are uniformly distributed on the outer wall of the connecting shaft 12 in the axial direction. The bottom end of the fixed shaft 22 is welded with the mounting plate two 21, and a plurality of reinforcing ribs two 26 are uniformly distributed on the outer wall of the fixed shaft 22 in the axial direction. The bottom end of the connecting shaft 12 is welded with the top end of the movable shaft 16. The top end of the fixed ring 14 is fixedly connected with the outer edge of the bottom end of the connecting shaft 12. The cross section of the reinforcing rib 17 is triangular or trapezoidal, and the reinforcing rib 17 is integrally formed with the inner wall of the movable shaft 16. The cross section of the convex rod 10 is triangular or trapezoidal.

[0029] The effect of the whole embodiment is that by increasing the fixed ring 14, the elastic member one 110 and the elastic member two 111, when the movable assembly 1 is lifted up and down, the sliding block 15 moves up and down along the sliding groove 23, thereby extruding the elastic member one 110 or the elastic member two 111. The elastic member one 110 and the elastic member two 111 have high elasticity (which can be rubber or spring). When the elastic member one 110 and the elastic member two 111 are extruded, the energy storage and energy absorption effect can be achieved, thereby further enhancing the anti-fracture effect of the transmission shaft.

[0030] ​The method for using and the working principle of the device are as follows: the transmission shaft of the lifting table is composed of a movable assembly 1 and a fixed assembly 2, the movable assembly 1 can slide up and down along the fixed assembly 2, the transmission shaft is combined with a transmission assembly to realize the up-and-down lifting function of the lifting table, the movable shaft 16 can slide up and down along the movable groove 24, the fixed ring 14 is slidably installed with the sliding block 15 at the bottom end thereof and the sliding groove 23, the fixed ring 14 can slide up and down along the outer wall of the fixed shaft 22, the fixed ring 14 and the movable shaft 16 are combined to enhance the anti-fracture performance of the whole transmission shaft and the stability of the movable assembly 1 during the up-and-down lifting, the connecting shaft 12 and the fixed shaft 22 are solid shafts, the movable shaft 16 is a hollow shaft segment with a smaller diameter, the solid shafts are used to connect the lifting table plate and the driving mechanism, the connecting shaft 12 with a larger diameter and a solid structure can provide sufficient strength and rigidity because it needs to bear a larger torque and axial force, a plurality of reinforcing ribs 17 are uniformly distributed on the inner wall of the movable shaft 16 in the axial direction, and the reinforcing ribs 17 are integrally formed with the shaft wall, so as to enhance the bending and torsional rigidity of the movable shaft 16, meanwhile, the gap between the reinforcing ribs 17 is filled with high-damping filler 18, the high-damping filler 18 can be rubber or damping alloy, when the transmission shaft is subjected to vibration or impact, the high-damping filler 18 can absorb energy to reduce the vibration amplitude, further reduce the additional stress generated by vibration, and improve the stability of the transmission shaft, the hollow movable shaft 16 in the middle can reduce the weight of the shaft, reduce the moment of inertia, and reduce the stress generated by the inertial force, the hollow structure also has a buffering effect, which helps to disperse stress concentration;

[0031] Meanwhile, a nitriding layer 19 is added to the outer wall of the movable shaft 16 (the surface of the movable shaft 16 is subjected to ion nitriding treatment to form a nitriding layer 19 with high hardness, good wear resistance and certain toughness on the shaft surface), the nitriding layer 19 can not only improve the hardness and wear resistance of the shaft surface, but also generate residual compressive stress on the surface to offset part of the tensile stress generated during work, further improve the fatigue life and anti-fracture ability of the transmission shaft;

[0032] By adding the fixed ring 14, the elastic member one 110 and the elastic member two 111, when the movable assembly 1 is lifted up and down, the sliding block 15 moves up and down along the sliding groove 23, thereby extruding the elastic member one 110 or the elastic member two 111, the elastic member one 110 and the elastic member two 111 have high elasticity (which can be rubber or spring), when they are extruded, they can achieve energy storage and energy absorption effect, thereby further enhancing the anti-fracture effect of the transmission shaft.

[0033] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields with equivalent changes, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A break-proof transmission shaft of a lifting table, comprising a movable assembly (1) and a fixed assembly (2), the bottom end of the movable assembly (1) being slidingly installed with the top end of the fixed assembly (2), characterized in that: The fixed assembly (2) comprises a fixed shaft (22), a plurality of sliding grooves (23) are arranged on the outer side of the fixed shaft (22) in a ring shape, a movable groove (24) is arranged on the top of the fixed shaft (22), and a plurality of limiting grooves (25) are uniformly distributed on the outer edge of the movable groove (24) in an axial direction, the movable assembly (1) comprises a fixed ring (14) and a movable shaft (16), the top end of the fixed ring (14) is fixedly connected with the top end of the movable shaft (16), a plurality of sliding blocks (15) are fixedly connected on the inner edge of the bottom end of the fixed ring (14) in a ring shape, one end of the sliding block (15) is slidably installed in the sliding groove (23), the outer side of the movable shaft (16) is slidably installed in the movable groove (24), a plurality of reinforcing ribs (17) are uniformly distributed on the inner wall of the movable shaft (16) in an axial direction, the gap between the reinforcing ribs (17) in the movable shaft (16) is filled with high-damping filler (18), a nitriding layer (19) is arranged on the outer wall of the movable shaft (16), a plurality of convex rods (10) are uniformly distributed on the outer wall of the movable shaft (16) in an axial direction, and the outer side of the convex rod (10) is slidably installed in the limiting groove (25).

2. The break-resistant lift table drive shaft of claim 1, wherein: The top end of the sliding block (15) is provided with an elastic piece one (110), and the bottom end of the sliding block (15) is provided with an elastic piece two (111).

3. The break-resistant lift table transmission shaft of claim 2, wherein: The top end of the sliding groove (23) is fixedly connected with one end of the elastic piece one (110), and the bottom end of the sliding groove (23) is fixedly connected with one end of the elastic piece two (111).

4. The break-resistant lift table transmission shaft of claim 1, wherein: The top end of the fixed ring (14) is welded with a connecting shaft (12), the top end of the connecting shaft (12) is welded with a mounting plate one (11), and a plurality of reinforcing ribs one (13) are uniformly distributed on the outer wall of the connecting shaft (12) in an axial direction.

5. The break-resistant lift table transmission shaft of claim 1, wherein: The bottom end of the fixed shaft (22) is welded with a mounting plate two (21), and a plurality of reinforcing ribs two (26) are uniformly distributed on the outer wall of the fixed shaft (22) in an axial direction.

6. The break-resistant lift table drive shaft of claim 4, wherein: The bottom end of the connecting shaft (12) is welded with the top end of the movable shaft (16), and the top end of the fixed ring (14) is fixedly connected with the outer edge of the bottom end of the connecting shaft (12).

7. The break-resistant lift table transmission shaft of claim 1, wherein: The cross section of the reinforcing rib (17) is triangular or trapezoidal, and the reinforcing rib (17) is integrally formed with the inner wall of the movable shaft (16).

8. The break-resistant lift table drive shaft of claim 1, wherein: The cross section of the convex rod (10) is triangular or trapezoidal.

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