CN213550352U

CN213550352U - Self-locking lifting table leg

Info

Publication number: CN213550352U
Application number: CN202021991712.1U
Authority: CN
Inventors: 陈千奎
Original assignee: Zhejiang Zhongwei Intelligent Furniture Co ltd
Current assignee: Zhejiang Zhongwei Intelligent Furniture Co ltd
Priority date: 2020-09-12
Filing date: 2020-09-12
Publication date: 2021-06-29
Anticipated expiration: 2030-09-12

Abstract

The utility model relates to a from locking-type lift table leg, including the stay tube, be provided with the lift lead screw in the stay tube, the opening part of stay tube upper end is provided with the lift screw with lift lead screw threaded connection, the upper end of lift lead screw is provided with and is used for driving lift lead screw pivoted rotary mechanism, rotary mechanism's lower extreme is provided with and is used for hindering lift lead screw pivoted locking mechanical system, locking mechanical system is including setting up in the brake lid of rotary mechanism lower extreme, lift lead screw upper end is connected with the brake lever, the lateral wall cover of brake lever is equipped with and is equipped with for brake lid pivoted brake ring, the lateral wall cover of brake ring is equipped with the elasticity torsional spring, the inside wall of elasticity torsional spring is hugged closely with the lateral wall of. After the lifting screw rod stops rotating, the elastic torsion spring applies holding force to the outer side wall of the brake ring, so that the brake ring is limited to rotate unexpectedly, a self-locking effect is formed, and the structural stability of the table leg is improved.

Description

Self-locking lifting table leg

Technical Field

The application relates to the field of table legs, in particular to a self-locking lifting table leg.

Background

The lifting table legs are widely applied to intelligent office equipment such as electric lifting tables and electric lifting platforms and applied to the fields of medical equipment and the like.

At present, the lift table leg includes actuating mechanism and elevating system usually, and elevating system includes the supporting leg usually, installs the lead screw in the supporting leg, and the lead screw nut with lead screw threaded connection is installed to the supporting leg upper end, and actuating mechanism drive lead screw rotates to make the lead screw go up and down for the supporting leg.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: screw on the supporting leg is made by the plastics material usually, and when the lead screw rotated at every turn, can take place wearing and tearing between the internal thread on external screw thread and the screw on the lead screw, after long-time use, the space increase between the internal thread adjacent on the screw to make the frictional force between the external screw thread of lead screw and the internal thread on the screw reduce, make the lead screw rotate and glide under the action of gravity easily, influence the normal use of desk, consequently remain to improve.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the unexpected gliding of lift lead screw, this application provides a from locking-type lift table leg.

The application provides a from locking-type lift table leg adopts following technical scheme:

the utility model provides a from locking-type lift table leg, includes inside cavity and opening stay tube up, be provided with the lift lead screw in the stay tube, the opening part of stay tube upper end is provided with the lift screw with lift lead screw threaded connection, the upper end of lift lead screw is provided with and is used for driving lift lead screw pivoted rotary mechanism, rotary mechanism's lower extreme is provided with and is used for hindering lift lead screw pivoted locking mechanical system, locking mechanical system is including setting up in the brake lid of rotary mechanism lower extreme, lift lead screw upper end is connected with the brake lever, the lateral wall cover of brake lever is equipped with and is equipped with for brake lid pivoted brake ring, the lateral wall cover of brake ring is equipped with the elasticity torsional spring, the inside wall of elasticity torsional spring is hugged closely with the lateral wall of.

Through adopting above-mentioned technical scheme, rotary mechanism can drive the lift lead screw and rotate, when the lift lead screw rotates, the brake lever drives the brake ring and rotates for the brake lid, the power of hugging tightly of elastic torsion spring needs to be overcome to the brake ring this moment, after the lift lead screw stall, the brake ring also stall, elastic torsion spring exerts the power of hugging tightly to the lateral wall of brake ring this moment, thereby the unexpected rotation of restriction brake ring, and then avoid the lift lead screw unexpected rotation under the action of gravity, form the effect of auto-lock, improve the structural stability of table leg.

Preferably, one side of the brake cover, which is far away from the rotating mechanism, is provided with a fixing groove for clamping one end of the elastic torsion spring, and one side of the brake cover, which is far away from the rotating mechanism, is detachably connected with a sealing plate for sealing the fixing groove.

By adopting the technical scheme, one end of the elastic torsion spring is clamped into the fixing groove, then the sealing plate is installed on the brake cover, and after the fixing groove is sealed by the sealing plate, one end of the elastic torsion spring can be limited to be separated from the fixing groove, so that the elastic torsion spring is installed between the brake cover and the brake ring; when the elastic torsion spring is damaged, the closing plate is detached, so that the elastic torsion spring can be detached and replaced by a new elastic torsion spring.

Preferably, the closing plate is detachably connected with the brake cover through a limit screw.

Through adopting above-mentioned technical scheme, use the screwdriver to pull down spacing screw and can pull down the closing plate from the brake lid to make the one end of elasticity torsional spring can break away from the fixed slot, and then be convenient for pull down the elasticity torsional spring.

Preferably, one end of the elastic torsion spring, which is far away from the fixing groove, is bent along the direction far away from the brake ring.

Through adopting above-mentioned technical scheme, can avoid causing wearing and tearing to the lateral wall of brake ring after the one end of elasticity torsional spring is buckled to the life of extension brake ring.

Preferably, rotary mechanism includes the fixing base of being connected with the brake cover upper end, the upper end of brake lever is connected with the dwang that stretches into in the fixing base, the cover is equipped with the swivel becket on the dwang, the fixed cover of lateral wall of swivel becket is equipped with first rotation gear, the rotation hole has all been seted up on two inner walls in opposite directions of fixing base, every all be provided with rolling bearing, two in the rotation hole the rotation is connected with the drive tube that is the horizontal direction setting between the rolling bearing, fixed cover is equipped with the second rotation gear with first rotation gear meshing on the drive tube, the upper end of fixing base can be dismantled and be connected with fixed lid, all set up the mounting hole that supplies rolling bearing card to go into on the two inner walls in opposite directions of fixed lid.

Through adopting above-mentioned technical scheme, the driving tube rotates, and the second transmitting gear in the driving tube outside drives first transmitting gear and rotates, and first transmitting gear drives the swivel becket and rotates to make the dwang rotate, and then make the dwang drive the lift lead screw and rotate.

Preferably, be connected with spacing post between dwang and the brake lever, the lower terminal surface of fixing base is connected with first spacing ring, the upper end of brake lid is connected with the second spacing ring, all be provided with the fixed bearing that the cover located the spacing post outside in first spacing ring and the second spacing ring.

Through adopting above-mentioned technical scheme, the fixing bearing cover is established and can be made the lift lead screw rotate more stable on spacing post, takes place to rock when avoiding the lift lead screw to rotate, improves the stability when lift lead screw rotates.

Preferably, a supporting gasket is arranged between the brake ring and the lifting screw nut, and the supporting gasket is sleeved on the brake rod.

Through adopting above-mentioned technical scheme, the supporting washer can prevent to take place to extrude and deformation between brake ring and the lift screw.

Preferably, one end, far away from the rotating mechanism, of the lifting screw rod is connected with a fixed block through a bolt, and the outer side wall of the fixed block is tightly attached to the inner side wall of the supporting pipe.

Through adopting above-mentioned technical scheme, pass through the bolt fastening with the fixed block behind the lower extreme of lift lead screw, the fixed block receives the hindrance of lift screw and can't break away from the stay tube to avoid the lift lead screw to break away from the stay tube.

In summary, the present application includes at least one of the following beneficial technical effects:

the rotating mechanism can drive the lifting screw rod to rotate, when the lifting screw rod rotates, the brake rod drives the brake ring to rotate relative to the brake cover, the brake ring needs to overcome the holding force of the elastic torsion spring, when the lifting screw rod stops rotating, the brake ring also stops rotating, and the elastic torsion spring exerts the holding force on the outer side wall of the brake ring, so that the accidental rotation of the brake ring is limited, the accidental rotation of the lifting screw rod under the action of gravity is further avoided, the self-locking effect is formed, and the structural stability of the table leg is improved;

one end of the elastic torsion spring is clamped into the fixing groove, then the sealing plate is installed on the brake cover, and after the sealing plate seals the fixing groove, one end of the elastic torsion spring can be limited to be separated from the fixing groove, so that the elastic torsion spring is installed between the brake cover and the brake ring; when the elastic torsion spring is damaged, the closing plate is detached, so that the elastic torsion spring can be detached and replaced by a new elastic torsion spring.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1;

fig. 3 is an exploded view of a part of the structure of the present embodiment.

Description of reference numerals: 1. supporting a tube; 11. lifting a screw nut; 2. a lifting screw rod; 3. a rotation mechanism; 31. a fixed seat; 311. rotating the hole; 312. a first limit ring; 32. rotating the rod; 33. a rotating ring; 34. a first rotating gear; 35. a rotating bearing; 36. a drive tube; 37. a second rotating gear; 38. a fixed cover; 381. mounting holes; 4. a locking mechanism; 41. a brake cover; 411. fixing grooves; 412. a second stop collar; 42. a brake lever; 43. a brake ring; 44. an elastic torsion spring; 45. a closing plate; 46. a limiting screw; 5. a limiting column; 6. fixing the bearing; 7. a support washer; 8. and (5) fixing blocks.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a self-locking lifting table leg. Referring to fig. 1 and 2, the self-locking lifting table leg comprises a supporting tube 1 which is installed on the ground along the vertical direction, the supporting tube 1 is hollow inside the supporting tube 1 and has an upward opening, a lifting screw rod 2 is arranged in the supporting tube 1, a lifting screw 11 which is connected with the lifting screw rod 2 in a threaded manner and is made of plastic is clamped at the opening at the upper end of the supporting tube 1, a rotating mechanism 3 which is used for driving the lifting screw rod 2 to rotate is arranged at the upper end of the lifting screw rod 2, and a locking mechanism 4 which is used for blocking the lifting screw rod 2 to rotate is arranged. After the rotation of the lifting screw 2 is stopped, the locking mechanism 4 can restrict the lifting screw 2 from freely rotating, thereby maintaining the stability of the table leg.

Referring to fig. 2 and 3, the locking mechanism 4 includes a brake cover 41 disposed at the lower end of the rotating mechanism 3, a brake rod 42 with a regular hexagonal cross section is fixedly connected to the upper end of the lifting screw rod 2, a brake ring 43 rotating relative to the brake cover 41 is sleeved on the outer side wall of the brake rod 42, and the outer side wall of the brake rod 42 is tightly attached to the inner wall of the brake ring 43, so that the brake rod 42 can be driven to rotate when the brake ring 43 rotates. The outer side wall cover of brake ring 43 is equipped with elasticity torsional spring 44, and the inside wall of elasticity torsional spring 44 is hugged closely with the outer side wall of brake ring 43, and the one end of elasticity torsional spring 44 can be dismantled with brake lid 41 and be connected, the other end is buckled along the direction that deviates from brake ring 43. The rotating mechanism 3 drives the lifting screw rod 2 to rotate, when the lifting screw rod 2 rotates, the brake rod 42 drives the brake ring 43 to rotate relative to the brake cover 41, at the moment, the brake ring 43 needs to overcome the holding force of the elastic torsion spring 44, after the lifting screw rod 2 stops rotating, the brake ring 43 also stops rotating, at the moment, the elastic torsion spring 44 applies the holding force to the outer side wall of the brake ring 43, so that the accidental rotation of the brake ring 43 is limited, the accidental rotation of the lifting screw rod 2 under the action of gravity is further avoided, a self-locking effect is formed, and the structural stability of the table leg is improved.

Referring to fig. 2 and 3, a fixing groove 411 for clamping one end of the elastic torsion spring 44 is formed in one side of the brake cover 41 facing the support tube 1, a closing plate 45 for closing the fixing groove 411 is connected to one side of the brake cover 41 away from the rotating mechanism 3 through two limiting screws 46, and the limiting screws 46 are round-head hexagon socket screws. One end of the elastic torsion spring 44 is caught in the fixing groove 411, and then the closing plate 45 is mounted on the brake cover 41 by the stopper screw 46, and after the closing plate 45 closes the fixing groove 411, one end of the elastic torsion spring 44 can be restricted from being separated from the fixing groove 411, so that the elastic torsion spring 44 is mounted between the brake cover 41 and the brake ring 43. When the elastic torsion spring 44 is damaged, the closing plate 45 can be removed by removing the two limit screws 46 with the phillips screwdriver, so that the elastic torsion spring 44 can be removed and replaced with a new elastic torsion spring 44.

Referring to fig. 2 and 3, a support washer 7 is installed between the brake ring 43 and the lifting screw 11, the support washer 7 is sleeved on the brake rod 42, the outer side wall of the brake rod 42 is tightly attached to the inner side wall of the support washer 7, the lower end of the brake ring 43 is tightly attached to the upper end face of the support washer 7, and the lower end face of the support ring is tightly attached to the upper end of the lifting screw 2. The support washer 7 can increase the contact area between the brake ring 43 and the lifting screw 11, and prevent the brake ring 43 and the lifting screw 11 from being deformed due to extrusion.

Referring to fig. 2, the lower end of the lifting screw rod 2 is detachably connected with a fixing block 8 through a bolt, and the outer side wall of the fixing block 8 is tightly attached to the inner side wall of the supporting tube 1. After the fixing block 8 is fixed at the lower end of the lifting screw rod 2 through a bolt, the fixing block 8 is blocked by the lifting screw 11 and cannot be separated from the supporting tube 1, so that the lifting screw rod 2 is prevented from being separated from the supporting tube 1.

Referring to fig. 2 and 3, the rotating mechanism 3 includes a fixing seat 31 installed at the upper end of the brake cover 41 and having a rectangular shape, the fixing seat 31 is hollow and has an upward opening, a limiting column 5 having a circular cross section is fixedly connected to the upper end of the brake rod 42, a first limiting ring 312 having a rectangular shape is fixedly connected to the lower end surface of the fixing seat 31, the inner side wall of the first limiting ring 312 is circular, and a second limiting ring 412 having the same structure as the first limiting ring 312 is fixedly connected to the upper end of the brake cover 41. The first retainer ring 312 and the second retainer ring 412 are connected by a round head cross self-tapping screw. The first limiting ring 312 and the second limiting ring 412 are both provided with a fixed bearing 6 sleeved outside the limiting post 5, and the outer side walls of the two rotating bearings 35 are respectively attached to the inner side walls of the first limiting ring 312 and the second limiting ring 412. The fixed bearing 6 is sleeved on the limiting column 5, so that the lifting screw rod 2 can rotate more stably, the lifting screw rod 2 is prevented from shaking when rotating, and the stability of the lifting screw rod 2 during rotating is improved.

Referring to fig. 2 and 3, the upper end of the limiting column 5 is fixedly connected with a rotating rod 32 extending into the fixing seat 31, and the cross section of the rotating rod 32 is a regular hexagon. The cover is equipped with swivel becket 33 on the dwang 32, and the lateral wall of dwang 32 is hugged closely with the inside wall of dwang 32, and the upper end threaded connection of dwang 32 has hexagon socket head cap screw, hexagon socket head cap screw's nut chucking swivel becket 33 to prevent swivel becket 33 from breaking away from dwang 32. The fixed cover of lateral wall of swivel ring 33 is equipped with first rotation gear 34, has all seted up on two inner walls in opposite directions of fixing base 31 and has rotated hole 311, all installs rolling bearing 35 in every rotation hole 311, rotates between two rolling bearing 35 to be connected with the driving tube 36 that is the horizontal direction setting, and the inside wall cross-section of driving tube 36 is regular hexagon. A second rotating gear 37 engaged with the first rotating gear 34 is fixedly sleeved on the driving pipe 36. The first and second

rotating gears

34 and 37 are both bevel gears. The upper end of the fixing seat 31 is connected with a fixing cover 38 used for sealing the upper end of the fixing seat 31 through a round head cross screw, and mounting holes 381 for the rotary bearing 35 to be clamped in are formed in two opposite inner walls of the fixing cover 38. The drive tube 36 is inserted by a drive rod driven by a servo motor. The driving rod is inserted into the driving tube 36, the servo motor drives the driving rod to rotate, the driving rod drives the driving tube 36 to rotate, and the second rotating gear 37 on the driving tube 36 drives the first gear to rotate, so that the rotating ring 33 drives the rotating rod 32 to rotate, and the lifting screw rod 2 is driven to rotate.

The implementation principle of this application embodiment from locking-type lift table leg does: when the table legs are lifted, the motor is started, the motor drives the driving pipe 36 to rotate through the driving rod, the second rotating gear 37 on the driving pipe 36 drives the first rotating gear 34 to rotate, the first rotating gear 34 drives the rotating ring 33 to rotate, the rotating ring 33 drives the rotating rod 32 to rotate, thereby driving the lifting screw rod 2 to rotate, the lifting screw rod 2 can drive the brake ring 43 to rotate during rotation, so that the brake ring 43 overcomes the holding force of the elastic torsion spring 44 to rotate, after the lifting screw rod 2 stops rotating, the elastic torsion spring 44 is instantly tightened, thereby holding the outer side wall of the brake ring 43 tightly, the rotation of the brake ring 43 is limited, thereby the lifting screw rod 2 cannot continue to rotate, further, when the lifting screw rod 2 stops at any height, the locking can be carried out at the first time, and the lifting screw rod 2 is more stable during up-down.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a from locking-type lift table leg, includes inside cavity and opening stay tube (1) up, be provided with lift lead screw (2) in stay tube (1), the opening part of stay tube (1) upper end is provided with lift screw (11) with lift lead screw (2) threaded connection, its characterized in that: the upper end of lift lead screw (2) is provided with and is used for driving lift lead screw (2) pivoted rotary mechanism (3), the lower extreme of rotary mechanism (3) is provided with and is used for hindering lift lead screw (2) pivoted locking mechanical system (4), locking mechanical system (4) are including setting up in brake lid (41) of rotary mechanism (3) lower extreme, lift lead screw (2) upper end is connected with brake lever (42), the lateral wall cover of brake lever (42) is equipped with for brake lid (41) pivoted brake ring (43), the lateral wall cover of brake ring (43) is equipped with elasticity torsional spring (44), the inside wall of elasticity torsional spring (44) is hugged closely with the lateral wall of brake ring (43), the one end and the brake lid (41) of elasticity torsional spring (44) are connected.

2. The self-locking lifting table leg as claimed in claim 1, wherein: one side of the brake cover (41) far away from the rotating mechanism (3) is provided with a fixing groove (411) for clamping one end of an elastic torsion spring (44), and one side of the brake cover (41) far away from the rotating mechanism (3) is detachably connected with a closing plate (45) for closing the fixing groove (411).

3. The self-locking lifting table leg as claimed in claim 2, wherein: the closing plate (45) is detachably connected with the brake cover (41) through a limiting screw (46).

4. The self-locking lifting table leg as claimed in claim 1, wherein: one end of the elastic torsion spring (44) far away from the fixing groove (411) is bent along the direction far away from the brake ring (43).

5. The self-locking lifting table leg as claimed in claim 1, wherein: the rotating mechanism (3) comprises a fixed seat (31) connected with the upper end of the brake cover (41), the upper end of the brake lever (42) is connected with a rotating lever (32) extending into the fixed seat (31), a rotating ring (33) is sleeved on the rotating rod (32), a first rotating gear (34) is fixedly sleeved on the outer side wall of the rotating ring (33), the two opposite inner walls of the fixed seat (31) are respectively provided with a rotating hole (311), each rotating hole (311) is internally provided with a rotating bearing (35), a driving pipe (36) arranged in the horizontal direction is rotatably connected between the two rotating bearings (35), a second rotating gear (37) meshed with the first rotating gear (34) is fixedly sleeved on the driving pipe (36), the upper end of fixing base (31) can be dismantled and be connected with fixed lid (38), all set up mounting hole (381) that supply rolling bearing (35) card to go into on two inner walls in opposite directions of fixed lid (38).

6. The self-locking lifting table leg as claimed in claim 5, wherein: be connected with spacing post (5) between dwang (32) and brake lever (42), the lower terminal surface of fixing base (31) is connected with first spacing ring (312), the upper end of brake lid (41) is connected with second spacing ring (412), all be provided with fixing bearing (6) that the cover was located the spacing post (5) outside in first spacing ring (312) and second spacing ring (412).

7. The self-locking lifting table leg as claimed in claim 1, wherein: a supporting gasket (7) is arranged between the brake ring (43) and the lifting screw (11), and the brake rod (42) is sleeved with the supporting gasket (7).

8. The self-locking lifting table leg as claimed in claim 1, wherein: one end of the lifting screw rod (2), which is far away from the rotating mechanism (3), is connected with a fixing block (8) through a bolt, and the outer side wall of the fixing block (8) is tightly attached to the inner side wall of the supporting pipe (1).